Patent Publication Number: US-2023158589-A1

Title: Saw blade, band saw blade, manufacturing method for saw blade, and manufacturing method for band saw blade

Description:
TECHNICAL FIELD 
     The present disclosure relates to a saw blade and a band saw blade each including, on the surface of a body part thereof, an information part from which information can be visually acquired, and a manufacturing method for the saw blade and a manufacturing method for the band saw blade. 
     BACKGROUND ART 
     Patent Literature 1 describes a band saw blade in which a mark is provided on the surface of a body part thereof, and a saw machine in which the band saw blade is used. The mark functions as an information part from which, for example, information for identifying the band saw blade can be visually acquired. 
     The saw machine described in Patent Literature 1 includes a saw blade guide that guides the traveling of the band saw blade in which the mark is provided on the surface of the body part. While the saw blade guide is arranged close to the surface of the body part to guide the traveling, the saw blade guide includes a recessed part so that a contact with the mark is avoided. 
     As a result, in the band saw blade, the mark will not be scraped by being rubbed against the saw blade guide during traveling, which makes it possible to prevent a problem that information becomes unable to be acquired from the mark over time. 
     CITATION LIST 
     Patent Literature 
     Patent Literature 1: Japanese Patent No. 3454846 
     SUMMARY 
     In order to utilize the disclosure of Patent Literature 1, it is necessary to retrofit saw blade guides that do not include recessed parts, which are attached to a large number of saw machines operating at the processing site, by being replaced with saw blade guides that include recessed parts. However, the retrofit imposes a heavy burden on a user in terms of cost and man-hours. 
     Therefore, a problem addressed by one aspect of the present invention is that the saw machine or an operator becomes unable to acquire information provided to the information part of the saw blade due to a friction or the like between the saw blade guide and the saw blade caused by the use of the saw blade. 
     One aspect of the present invention includes the following configurations and procedures.
         1) A saw blade including a body part, a blade part formed on one edge side of the body part, a first shot blasted part formed on at least one side plane of the body part, a second shot blasted part formed in a part of the first shot blasted part and visually recognized as a range having a surface state different from a surface state of the first shot blasted part, and an information part that is provided to the second shot blasted part and from which information can be acquired.   2) The saw blade according to 1), in which the information is identification information for identifying the saw blade, and the identification information can be visually acquired from the information part.   3) A band saw blade including a body part made into a loop in an endless form at a joint part formed by welding, a blade part formed on one edge side of the body part, a first shot blasted part formed on at least one side plane of the body part, a second shot blasted part formed in a part of the first shot blasted part and visually recognized as a range having a surface state different from a surface state of the first shot blasted part, and an information part that is provided to the second shot blasted part and from which information can be acquired.   4) A band saw blade including a body part made into a loop in an endless form at a joint part formed by welding, a blade part formed on one edge side of the body part, a shot blasted part, on a side plane of the body part, formed in a predetermined range including the joint part and including a surface rougher than a surface of another range, and an information part that is provided to the shot blasted part and from which information can be acquired.   5) The band saw blade according to 4), in which the surface of the predetermined range is scooped out with respect to the surface of the other range.   6) The band saw blade according to any one of 3) to 5), in which the information is identification information for identifying the band saw blade, and the identification information can be visually acquired from the information part.   7) A manufacturing method for a saw blade, including forming a shot blasted part by a first shot blasting on at least one side plane of a body part of a saw blade material including the body part and a blade part formed on one edge side of the body part, forming a shot blasting overlapped part by a second shot blasting in a desired range of the formed shot blasted part, and forming an information part by providing, to the shot blasting overlapped part, an information part from which information can be acquired.   8) The manufacturing method for a saw blade according to 7), further including forming an oil coated film obtained by applying a rust preventive oil to the at least one side plane of the body part during a period other than a period during which the shot blasting overlapped part is formed and the information part is formed.   9) A manufacturing method for a band saw blade, including forming a shot blasted part by a first shot blasting on at least one side plane of a body part of a saw blade material including the body part and a blade part formed on one edge side of the body part, forming a shot blasting overlapped part by a second shot blasting in a desired range of the formed shot blasted part, forming an information part by providing, to the shot blasting overlapped part, an information part from which information can be acquired, and making the saw blade material into a loop in an endless form so as to form a band saw blade shape before the shot blasting overlapped part is formed or after the information part is formed.   10) The manufacturing method for a band saw blade according to 9), further including forming an oil coated film obtained by applying a rust preventive oil on the at least one side plane of the body part during a period other than a period during which the shot blasting overlapped part is formed and the information part is formed.   11) A manufacturing method for a band saw blade, including welding ends of a saw blade material to each other to make a loop in an endless form, the saw blade material including a body part and a blade part formed on one edge side of the body part, polishing a predetermined range on a side plane of the body part, the predetermined range including the joint part welded in making the loop, forming a shot blasted part by a shot blasting within the predetermined range, and forming an information part by providing, to the shot blasted part, an information part from which information can be acquired.   12) The manufacturing method for a band saw blade according to 11), further including forming an oil coated film obtained by applying a rust preventive oil on the side plane of the body part before the shot blasted part is formed or after the information part is formed.   13) The manufacturing method for a saw blade according to 7) or 8), in which the information part is formed by providing the information part by way of printing with an ink.   14) The manufacturing method for a band saw blade according to any one of 9) to 12), in which the information part is formed by providing the information part by way of printing with an ink.   15) The manufacturing method for a saw blade according to any one of 7), 8), and 13), in which the information is identification information for identifying the saw blade, and the identification information can be visually acquired from the information part.   16) The manufacturing method for a band saw blade according to any one of 9) to 12) and 14), in which the information is identification information for identifying the band saw blade, and the identification information can be visually acquired from the information part.       

     According to the saw blade and the band saw blade and/or the saw blade manufacturing method and the band saw blade manufacturing method of the present invention, an effect can be obtained in which the saw machine or the operator can maintain a state of being able to acquire information from the information part on the surface of the saw blade without retrofitting the saw machine. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is a perspective view showing a coil material  1 C of a saw blade material  1 , which is a material of a band saw blade  1 P that is a first embodiment of a band saw blade according to one aspect of the present invention. 
         FIG.  2    is a partial plan view showing the saw blade material  1 . 
         FIG.  3    is a partial plan view showing a state in which a shot blasted part  21  is formed on the saw blade material  1 . 
         FIG.  4    is a partial plan view showing a state in which a rust preventive oil  22  is applied to the saw blade material  1  on which the shot blasted part  21  shown in  FIG.  3    is formed. 
         FIG.  5    is a partial plan view showing a state in which a shot blasting overlapped part  23  is formed on the saw blade material  1  shown in  FIG.  4    to which the rust preventive oil  22  is applied. 
         FIG.  6    is a cross-sectional view at positions from S 6  to S 6  in  FIG.  5   . 
         FIG.  7    is a partial plan view showing the band saw blade  1 P in which a mark  24 , which is an information part, is provided to the shot blasting overlapped part  23  shown in  FIG.  5   . 
         FIG.  8    is a cross-sectional view at positions from S 8  to S 8  in  FIG.  7   . 
         FIG.  9    is a partial cross-sectional view showing a band saw blade  1 P 1  of a second embodiment. 
         FIG.  10    is a partial cross-sectional view showing a band saw blade  1 P 2  of a third embodiment. 
         FIG.  11    is a procedural diagram showing up to the manufacturing of a loop base material  1 R in the intermediate stage of the manufacturing method for a band saw blade  1 P 3  of a fourth embodiment. 
         FIG.  12    is a cross-sectional view at positions from S 12  to S 12  of the loop base material  1 R shown in (f) of  FIG.  11   . 
         FIG.  13    is a cross-sectional view showing a band saw blade  1 R 1  of a fifth embodiment in which a mark  261 , which is an information part, is provided to the loop base material  1 R. 
         FIG.  14    is a cross-sectional view showing a band saw blade  1 R 2  of a sixth embodiment in which marks  261  and  262 , which are information parts, are provided to the loop base material  1 R. 
         FIG.  15    is a partial plan view of the band saw blade  1 R 1  that shows the mark  261 . 
         FIG.  16    is a partial plan view showing a state in which the rust preventive oil  22  is applied to the band saw blade  1 R 1 . 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Embodiments of a band saw blade according to one aspect of the present invention will be described by using band saw blades  1 P,  1 P 1 ,  1 P 2 ,  1 R 1 , and  1 R 2  of first to fifth embodiments, respectively. 
     (First Embodiment) 
     The band saw blade of the first embodiment is the band saw blade  1 P, which can be manufactured by the following exemplary manufacturing method described with reference to  FIGS.  1  to  8   . 
       FIG.  1    is a perspective view showing a coil material  1 C of a saw blade material  1 , which is a material of the band saw blade  1 P that is the first embodiment of the band saw blade according to the present embodiment. The band saw blade  1 P is manufactured from, for example, the coil material  1 C of the saw blade material  1  as shown in  FIG.  1   . 
       FIG.  2    is an enlarged view of a C portion in the saw blade material  1  shown in  FIG.  1   . As shown in  FIG.  2   , the saw blade material  1  includes a body part  11  that is a band-shaped member formed of high-speed steel or the like, and a blade part  12  formed on one edge side of the body part  11 . 
     First, as shown in  FIG.  3   , both side planes of the saw blade material  1  are roughened by a first shot blasting, which is the shot blasting performed for the first time, to form a shot blasted part  21  that is a first shot blasted part. The first shot blasting is referred to as shot blasted part formation. In  FIG.  3   , the shot blasted part  21  is shown by using fine dots. 
     A large number of recessed parts  21   a  (see  FIG.  6   ) are formed in the shot blasted part  21 . As a result, the shot blasted part  21  has, for example, a rough surface having an arithmetic mean roughness Ra of about 4 μm. By forming the shot blasted part  21 , the mechanical properties of the saw blade material  1  are improved. For example, fatigue strength is increased. 
     Next, as shown in  FIG.  4   , a rust preventive oil  22  is applied to both side planes of the body part  11 . Since the shot blasted part  21  is formed into a new surface and thus is prone to rust, the rust preventive oil  22  is applied to prevent the occurrence of rust. 
     Next, as shown in  FIG.  5   , masking is performed so that a shot blasting is not applied to a range other than a desired range ARa, and then a second shot blasting, which is the shot blasting performed for the second time, is performed to the range ARa. 
     The second shot blasting is referred to as shot blasting overlapped part formation. By forming the shot blasting overlapped part, a shot blasting overlapped part  23 , which is a second shot blasted part, is formed in the range ARa. 
     In  FIG.  5   , the shot blasting overlapped part  23  is shown by using fine dots whose density is higher than the density of those of the shot blasted part  21 . The range ARa is set to include a range to which a mark  24 , which will be described later, is provided. For example, the range ARa is set to a part other than the vicinity of a joint part at which the saw blade material  1  is made into a loop and the ends thereof are welded to each other to form a band saw blade. 
       FIG.  6    is a cross-sectional view at positions from S 6  to S 6  in  FIG.  5   . In other words,  FIG.  6    shows a cross section of the saw blade material  1  in which the shot blasting overlapped part  23  is formed in the range ARa on one side plane of the body part  11 . 
     The shot blasting overlapped part  23  is in a state in which the rust preventive oil  22  and dust adhering to the surface thereof have been removed by the second shot blasting. 
     With respect to the shot blasted part  21 , the shot blasting overlapped part  23  has, for example, a rough surface of a new surface in which recessed parts  23   a  are formed more densely than the recessed parts  21   a  with the same arithmetic average roughness Ra. 
     With respect to the shot blasted part  21 , the shot blasting overlapped part  23  has a different degree of light reflection and glossiness due to the difference in density of the recessed parts, and thus is visually recognized as a range having a different surface state. 
     The type and degree of the shot blasting applied to the side plane of the body  11  is not limited. For example, any second shot blasting may be performed as long as the rust preventive oil  22  and dust adhering to the surface of the side plane are removed to make the uneven state of the surface denser. 
     After the shot blasting overlapped part  23  is formed on the range ARa on the one side plane of the body part  11  as shown in  FIGS.  5  and  6   , the mark  24  is printed on the range ARa as shown in  FIG.  7   . Specifically, a printing device causes an ink to adhere, in the shape of the predetermined mark  24 , to a desired position within the shot blasting overlapped part  23 . The treatment of adhering the mark  24  is referred to as information part formation. 
     The saw blade material  1  is provided with the mark  24 , and is made into a loop in an endless form by way of welding by which the ends thereof are jointed to each other for making a loop, so as to become the band saw blade  1 P. Further, after the saw blade material  1  is provided with the mark  24  to form the band saw blade  1 P, the rust preventive oil  22  is applied to the range ARa. Oil coated film formation, which is the application of the rust preventive oil  22 , is carried out during a period other than a period from forming the shot blasting overlapped part  23  to providing the mark. 
     The mark  24  is an information part from which information, such as identification information for identifying the type, physical properties, material, application, and the like of the band saw blade to be manufactured, can be visually acquired in a direct or indirect manner. Specifically, the mark  24  is a character, a symbol, a pattern, a one-dimensional or two-dimensional code, or the like. 
       FIG.  8    is a cross-sectional view at positions from S 8  to S 8  in  FIG.  7   . 
     As shown in  FIG.  8   , no oil or dust adheres to the surface of the area ARa in which the shot blasting overlapped part  23  is formed. 
     Therefore, the printing operation of the printing device causes an ink  24   a  to satisfactorily enter inside of the recessed parts  23   a  in a part corresponding to the mark  24 , and thus is maintained with a high degree of adhesion. 
     In other words, in the band saw blade  1 P, the mark  24 , which is the information part, is printed with a high degree of adhesion to the shot blasting overlapped part  23  in which the oil and dust have been removed by performing the shot blasting a plurality of times to make the unevenness denser than the other parts. 
     Therefore, even when the band saw blade  1 P is used in a band saw, travels while passing through a saw blade guide, and repeats the cutting process, the mark  24  is less likely to disappear compared with a case in which the mark  24  is printed in a state in which the oil or the dust adheres. Further, the mark  24  is less likely to disappear compared with a case in which the mark  24  is printed on the shot blasted part  21  to which the shot blasting is applied once. 
     Further, since the range ARa provided with the mark  24 , which is the information part, is the shot blasting overlapped part  23  in which the shot blasting is executed a plurality of times, a part in the vicinity of the surface in the surface direction and in the thickness direction is harder than that of the shot blasted part  21  that is a part in which the shot blasting is executed once. 
     Therefore, when the band saw blade  1 P is set in the band saw machine and is travelling, the shot blasting overlapped part  23  is particularly less likely to be scrapped even if the saw blade guide comes into contact with the side plane of the body part  11 . 
     As a result, the mark  24 , which is the information part provided to the shot blasting overlapped part  23 , is less likely to disappear, and the problem that the information becomes unable to be acquired from the mark  24  over time is less likely to occur. 
     The first embodiment may be a simple band-shaped saw blade  1 N that is not made into a loop in an endless form (see  FIGS.  7  and  8   ). For example, the first embodiment may be a saw blade for a reciprocating saw. 
     (Second Embodiment) 
       FIG.  9    is a cross-sectional view of the band saw blade  1 P 1  of the second embodiment. 
     As shown in  FIG.  9   , with respect to the band saw blade  1 P of the first embodiment, in the band saw blade  1 P 1 , the shot blasting overlapped parts  23  are formed as shot blasting overlapped parts  231  and  232  on both side planes of the body part  11 , and the mark  24  is provided as a mark  241  only to the shot blasting overlapped part  231  of one side. 
     Specifically, in the band saw blade  1 P 1 , the shot blasting overlapped part  231  is formed in the range ARa of one surface of the body part  11 , and the shot blasting overlapped part  232  is formed in the range ARb of the other surface. The second embodiment may be a simple band-shaped saw blade  1 N 1  that is not made into a loop in an endless form (see  FIG.  9   ). For example, the second embodiment may be a saw blade for a reciprocating saw. 
     In the band saw blade  1 P of the first embodiment, the shot blasting overlapped part  23  is formed only on the surface of one side. 
     Therefore, residual stress generated by the shot blasting is larger on the side on which the shot blasting overlapped part  23  is formed than on a side on which the shot blasting overlapped part  23  is not formed. Thus, strictly speaking, as the band saw blade  1 P, the residual stress in the thickness direction in the range Ara is in an unbalanced state. 
     On the other hand, in the band saw blade  1 P 1  of the second embodiment, the shot blasting overlapped parts  231  and  232  are formed substantially symmetrically on both surfaces of the body part  11 . Therefore, in the range ARa and the range ARb, the residual stress is in a highly balanced state in the thickness direction. 
     Therefore, in the band saw blade  1 P 1 , even if the cumulative travelling time in the saw machine is long, distortion due to uneven residual stress is less likely to occur, which leads to a long life. 
     (Third Embodiment) 
       FIG.  10    is a cross-sectional view of the band saw blade  1 P 2  of the third embodiment. 
     As shown in  FIG.  10   , with respect to the band saw blade  1 P 1  of the second embodiment, in the band saw blade  1 P 2 , the marks  24 , which are the information parts, are provided to the shot blasting overlapped parts  231  and  232  on both sides of the body part  11 , respectively, as the marks  241  and  242 . 
     Specifically, a large number of recessed parts  231   a  are formed by the shot blasting on the shot blasting overlapped part  231 , and an ink  241   a  is maintained in the recessed parts  231   a  corresponding to the mark  241 . 
     Further, a large number of recessed parts  232   a  are formed by the shot blasting on the shot blasting overlapped part  232 , and an ink  242   a  is maintained in the recessed parts  232   a  corresponding to the mark  242 . 
     As a result, even if the band saw blade  1 P 2  is used for band saw machines each having a different traveling direction to each other, either one of the marks  241  and  242  can be easily visually recognized, which makes handling thereof highly convenient. The third embodiment may be a simple band-shaped saw blade  1 N 2  that is not made into a loop in an endless form (see  FIG.  10   ). For example, the third embodiment may be a saw blade for a reciprocating saw. 
     (Fourth Embodiment) 
     The band saw blades  1 P,  1 P 1 , and  1 P 2  of the first to third embodiments are respectively provided with the marks  24 ,  241 , and  242  each on the side plane not in the vicinity of the joint part at which the saw blade material  1  is made into a loop in an endless form by way of welding. On the other hand, the band saw blade  1 R 1  of the fourth embodiment includes a mark  261 , which is the information part, on a side plane in the vicinity of the joint part including the joined part. 
     An example of a manufacturing method for the band saw blade  1 R 1  will be described with reference to  FIGS.  11  to  13   . 
       FIG.  11    is a procedural diagram showing up to the manufacturing of an endless loop base material  1 R in the intermediate stage of the manufacturing method for the band saw blade  1 R 1 .  FIG.  12    is a cross-sectional view of a joint part M of the endless loop base material  1 R and its vicinity.  FIG.  13    is a cross-sectional view showing a state in which the loop base material  1 R is provided with the mark  261 , which is the information part, to form the band saw blade  1 R 1 . 
     As shown in (a) of  FIG.  11   , the band saw blade  1 R 1  is manufactured from, for example, the coil material  1 C of the saw blade material  1 . The saw blade material  1  includes the body part  11  that is a band-shaped member made of high-speed steel or the like, and the blade part  12  that is formed on one edge of the body part  11 . 
     First, with respect to the surface of the saw blade material  1  in a state of being pulled out from the coil material  1 C [see (a)] or the saw blade material  1  pulled out from the coil material  1 C and cut into a predetermined length, as shown in (b) and (c), (b) the shot blasting is performed, and (c) the rust preventive oil is applied. The saw blade material  1  in the state of being pulled out from the coil material  1 C is cut into a predetermined length. 
     Next, with respect to the saw blade material  1  cut into the predetermined length, pre-welding treatment such as removing a burr generated at the cut end is performed. Then, as shown in (d), welding is performed on the joint part M in which the ends of the saw blade material  1  are abutted to each other, to form the loop base material  1 R in a band saw shape including the body part  11  and the blade part  12  that are in an endless loop form. 
     In (e) of  FIG.  11   , a plan view is shown in which the joint part M of the endless loop base material  1 R and the vicinity thereof are shown. As shown in (e), the shot blasted part  21  is formed by the shot blasting on a side plane of the endless loop base material  1 R, to which the rust preventive oil  22  is applied. 
     Next, polishing treatment is performed on a predetermined range ARc in which the joint part M in the endless loop base material  1 R is located at a substantially central position in the longitudinal direction in order to smooth the surface by removing a protruded part and the like generated by the butt welding. The polishing treatment is referred to as protruded part polishing, and the area in which the polishing treatment is performed is referred to as a polished part  25 . 
     In (e), the range in which the polished part  25  is formed is indicated by the range ARc in the longitudinal direction with hatching using non-inclined horizontal lines. 
     The method of the polishing treatment is not limited, and belt polishing is used, for example. 
     Next, as shown in (f) of  FIG.  11   , the shot blasting is performed, which is the first time for the polished part  25 , to at least a range ARe included in the range ARc while masking is performed so that shot blasting is not applied to a range other than the polished part  25 . 
     As a result, a shot blasted part  27  is formed on the entire polished part  25  or a part thereof of the range ARc. The surface on which the shot blasted part  27  is provided becomes a new surface, with the rust preventive oil  22  and dust adhering to the surface being removed. The range ARe on which the shot blasted part  27  is formed is indicated by using fine dots in (f). 
       FIG.  12    is a cross-sectional view at positions from S 12  to S 12  in (f) of  FIG.  11   . 
     The polished parts  25  are formed as polished parts  251 , and  252 , respectively, in substantially corresponding ranges on both sides of the body part  11 . With respect to the other parts, the polished parts  251  and  252  are parts that are scooped out due to the polishing processing. The surface shape of the polished parts  251  and  252  is not limited as long as it is a surface that is a recessed part with respect to a surface other than the polished parts  251  and  252 . 
     Shot blasted parts  271  and  272  are formed as shot blasted parts  27  in the polished parts  251  and  252 , respectively, to form new surfaces. Further, in the shot blasted parts  271  and  271 , the oil and dust adhering to the respective surfaces are also removed with recessed parts  271   a  and  272   a  being formed. The shot blasted parts  271  and  272  are formed in such a manner that the arithmetic average roughness Ra and the density of the unevenness are, for example, the same as those of the shot blasted part  21 . 
     In  FIG.  12   , the range ARe in which the shot blasted part  271  is formed is a range that is the same as the range ARc in which the polished part  251  is formed, or is a range included in the range ARc. 
     A range ARf in which the shot blasted part  272  is formed is a range that is the same as the range ARd in which the polished part  252  is formed, or is a range included in the range ARd. 
     Next, as shown in  FIG.  13   , the printing machine causes an ink  261   a  to adhere, in the shape of the predetermined mark  261 , only to the polished part  251  in which the shot blasted part  271  including a large number of the recessed parts  271   a  is formed. In other words, the mark  261  is printed on the range ARc. 
     The mark  261  is the information part from which, for example, information such as identification information for identifying the type, physical properties, material, application, and the like of the band saw blade to be manufactured can be visually acquired in a direct or indirect manner. Specifically, the mark  261  is a character, a symbol, a pattern, a one-dimensional or two-dimensional code, or the like. 
     Since the polished part  251  is made into a new surface and the oil and dust are also removed, the ink  261   a  with which the printing is performed satisfactorily enters the recessed parts  271   a  of the part corresponding to the mark  261  and is maintained with a high degree of adhesion. 
     The loop base material  1 R is provided with the mark  261  to become the band saw blade  1 R 1  of the fourth embodiment. 
     As described above, in the band saw blade  1 R 1 , since the mark  261 , which is the information part, is provided to the shot blasted part  271  that is a new surface from which the oil and dust have been removed, the mark  261  has a high degree of adhesion with the recessed parts  271   a  and is less likely to disappear over time. 
     As a result, the band saw blade  1 R 1  can maintain a state in which information can be acquired from the mark  261  for a long period of time. 
     The polished part  251  is a part that is scooped out deeper than the other parts in the body part  11 . Therefore, when the band saw blade  1 R 1  is mounted on the saw machine and is caused to travel, the saw blade guide is less likely to come into contact with the polished part  251 . Even if the saw blade guide comes into contact with the polished part  251  of the travelling band saw blade  1 R 1 , almost no force is applied in the thickness direction. 
     Therefore, in the band saw blade  1 R 1 , the mark  261  is hardly scraped over time as the band saw blade  1 R 1  travels, and the state can be maintained in which information can be acquired from the mark  261  for a long period of time. 
     (Fifth Embodiment) 
       FIG.  14    is a cross-sectional view of the band saw blade  1 R 2  of the fifth embodiment. 
     As shown in  FIG.  14   , the band saw blade  1 R 2  includes the polished part  251  of the range ARc in which the shot blasted part  271  is formed as the range ARe, and the polished part  252  of the range ARd in which a shot blasted part  272  is formed as a range ARf. 
     Then, in the band saw blade  1 R 2 , the printing device causes inks  261   a  and  262   a  to adhere, in the form of the marks  261  and  262 , to the polished parts  251  and  252 , respectively. 
     In other words, in the band saw blade  1 R 2 , the mark  261  is provided to the range ARe and the mark  262  is provided to the range ARf. 
     As a result, even if the band saw blade  1 R 2  is used for the band saw machines each having a different traveling direction to each other, either one of the marks  261  and  262  can be easily visually recognized, which makes handling thereof highly convenient. 
     Further, the marks  261  and  262  of the band saw blade  1 R 2  are respectively provided to the polished parts  251  and  252 , each of which is the part that is scooped out deeper than the other parts of the body part  11 . 
     Therefore, both the marks  261  and  262  of the band saw blade  1 R 2  are hardly scraped as the band saw blade  1 R 2  travels, and the state can be maintained in which information can be acquired from the marks  261  and  262  for a long period of time. 
       FIG.  15    is a plan view of the vicinity of the band saw blade  1 R 1  or the band saw blade  1 R 2  including the joint part M. 
     As shown in  FIG.  15   , the mark  261 , which is the information part from which information can be visually acquired, is provided to the shot blasted part  27  formed in the polished part  25 . 
     As shown in  FIG.  16   , the band saw blade  1 R 1  and the band saw blade  1 R 2  each including at least the information part of the mark  261  are respectively shipped with the rust preventive oil  221  applied to the polished part  25  thereof. 
     As described above in detail, in the respective band saw blades  1 P,  1 P 1 ,  1 P 2 ,  1 R 1 , and  1 R 2  of the first to fifth embodiments and the respective saw blades  1 N,  1 N 1 , and  1 N 2  of the first to third embodiments, the saw machine or the operator can acquire information from the information part provided to the side plane of the body part  11  thereof without retrofitting the saw machine, and the state can be maintained in which information can be acquired for a long period of time. 
     The embodiments are not limited to the configurations and procedures described above, and may be modified as long as they do not deviate from the summary of the present invention. 
     Although the mark  24  formed of ink has been described as an example of the information part, the mark  24  is not limited to the one formed of ink and may be provided by another method such as laser marking. 
     A method of roughening the surface including the polished part  25  of the body part  11  is not limited to the shot blasting. A well-known method of roughening the surface of a metal material can be used. 
     The mark  261  that is the information part formed on each of the band saw blades  1 P,  1 P 1 , and  1 P 2  of the first to third embodiments can also be applied to a band saw blade in a band shape and a saw blade in a disk shape that is not a saw blade. 
     In the band saw blades  1 P,  1 P 1 , and  1 P 2  of the first to third embodiments, respectively, the saw blade material  1  can be made into a loop in an endless form before the shot blasting overlapped part  23  is formed or after the marks  24  and  241  are formed. 
     The disclosure of the present application is related to the subject matter described in Japanese Patent Application No. 2020-049269 filed on Mar. 19, 2020, all of which are incorporated herein by reference.