Abstract:
A method for machining at least one workpiece with multiple process includes providing a positioning assembly and at least two machining devices, positioning the at least one workpiece on the positioning assembly, positioning the positioning assembly on one of the at least two machining devices and machining the at least one workpiece, and transferring the positioning assembly together with the at least one workpiece on other different machining devices for undergoing different machining processes.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present disclosure relates generally to machining process, and more particularly, to a method for machining workpieces with multiple processes. 
         [0003]    2. Description of Related Art 
         [0004]    In machining workpieces, a machining device and a positioning assembly are often provided. The positioning assembly is generally fixed on the device to position the workpieces so that the device can accurately machine the workpieces. After the workpieces are machined, the workpieces are disassembled from the positioning assembly. 
         [0005]    With the increasing market demands, workpieces require numerous operations to achieve an extensive range of predetermined sizes and configurations. Thus, the workpieces must be repeatedly assembled to and disassembled from different positioning assemblies of different devices. This transfer and mounting consumes time. Further, positional errors become increasingly likely, with definite impairment of machining precision. Further, damage to the workpieces is also more prevalent. 
         [0006]    Therefore, there is room for improvement within the art. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]    The components in the drawings are not necessarily drawn to scale, the emphasis instead placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
           [0008]      FIG. 1  is a flowchart of an embodiment of a method of machining workpiece. 
           [0009]      FIG. 2  is an isometric view of a first workpiece and a second workpiece before machining. 
           [0010]      FIG. 3  is an isometric view of the first workpiece and the second workpiece positioned on a positioning assembly. 
           [0011]      FIG. 4  is a cross-section of the first workpiece, the second workpiece, and the positioning assembly of  FIG. 3 , taken along line IV-IV. 
           [0012]      FIG. 5  is an isometric view of the positioning assembly together with the first workpiece and the second workpiece of  FIG. 2 , positioned and milled on a milling machine. 
           [0013]      FIG. 6  is an isometric view of the positioning assembly together with the first workpiece and the second workpiece of  FIG. 2 , positioned and ground on a grinding machine. 
           [0014]      FIG. 7  is an isometric view of the positioning assembly together with the first workpiece and the second workpiece of  FIG. 2 , positioned and welded on a welding machine. 
           [0015]      FIG. 8  is an isometric view of the positioning assembly together with the first workpiece and the second workpiece of  FIG. 2 , positioned and sandblasted on a sandblasting machine. 
           [0016]      FIG. 9  is an isometric view of the positioning assembly together with the first workpiece and the second workpiece of  FIG. 2 , positioned and chamfered on a chamfering machine. 
           [0017]      FIG. 10  is an isometric view of the positioning assembly together with the first workpiece and the second workpiece of  FIG. 2 , positioned and marked on a marking machine. 
           [0018]      FIG. 11  is an isometric view of a final product. 
       
    
    
     DETAILED DESCRIPTION 
       [0019]    Referring to  FIG. 1 , an embodiment of a method of machining workpieces is as follows. 
         [0020]    Referring to  FIGS. 2 through 4 , in a first step  501 , a first workpiece  11 , a second workpiece  12 , and a positioning assembly  20  are provided. In the illustrated embodiment, the first workpiece  11  and the second workpiece  12  are substantially U-shaped, and a length of the first workpiece  11  exceeds that of the second workpiece  12 . The first workpiece  11  and the second workpiece  12  are metal materials, such as stainless steel. The positioning assembly  20  includes a first clamping body  21  and a second clamping body  22 . The first clamping body  21  forms a first positioning portion  211  and an assembly portion  213  (see  FIG. 4 ). The first positioning portion  211  is defined in one end of the first clamping body  21  and the assembly portion  213  extends outward from an opposite end of the first clamping body  21 . The second clamping body  22  forms a second positioning portion  221  in a first end of the second clamping body  22 , and defines an assembly hole  223  in a second end opposite to the first end. The first positioning portion  211  and the second positioning portion  221  are grooves in this embodiment. 
         [0021]    In a second step  502 , the first workpiece  11  and the second workpiece  12  are positioned on the positioning assembly  20 . In the illustrated embodiment, the first workpiece  11  and the second workpiece  12  are both sleeved on the assembly portion  213  of the first clamping body  21 . The assembly portion  213  is then received in the assembly hole  223 , until the first workpiece  11  and the second workpiece  12  are clamped by the first clamping body  21  and the second clamping body  22 . The first workpiece  11  and the second workpiece  12  partially extend from an outer surface of the positioning assembly  20 . 
         [0022]    Referring to  FIGS. 1 and 5 , in a third step  503 , a milling machine  31  is provided. The positioning assembly  20  is positioned on the milling machine  31  via the first positioning portion  211  and the second positioning portion  221 . Outer surfaces of the first workpiece  11  and the second workpiece  12  are then milled by the milling machine  31 . In the illustrated embodiment, the positioning assembly  20  is grasped by two fixing members  311  with protrusions (not shown) of the fixing members  311  received in the first positioning portion  211  and the second positioning portion  221  of the positioning assembly  20 . 
         [0023]    Referring to  FIGS. 1 and 6 , in a fourth step  504 , the positioning assembly  20  is detached from the milling machine  31  and repositioned on a grinding machine  32  via the first positioning portion  211  and the second positioning portion  221 . Outer surfaces of the first workpiece  11  and the second workpiece  12  are then grinded by the grinding machine  32 . 
         [0024]    Referring to  FIGS. 1 and 7 , in a fifth step  505 , the positioning assembly  20  is detached from the grinding machine  32  and repositioned on a welding machine  33  via the first positioning portion  211  and the second positioning portion  221 . The first workpiece  11  and the second workpiece  12  are then welded by the welding machine  33 . It should be appreciated that the first workpiece  11  and the second workpiece  12  can also be connected by an injection molding machine (not shown). In this case, the first workpiece  11  and the second workpiece  12  are connected by plastic material injected by the injection molding machine. 
         [0025]    Referring to  FIGS. 1 and 8 , in a sixth step  506 , the positioning assembly  20  is detached from the welding machine  33  and repositioned on a sandblasting machine  34  via the first positioning portion  211  and the second positioning portion  221 . Outer surfaces of the first workpiece  11  and the second workpiece  12  are then sandblasted by the sandblasting machine  34 . 
         [0026]    Referring to  FIGS. 1 and 9 , in a seventh step  507 , the positioning assembly  20  is detached from the sandblasting machine  34  and repositioned on a chamfering machine  35  via the first positioning portion  211  and the second positioning portion  221 . Corners of the first workpiece  11  and the second workpiece  12  are then chamfered by the chamfering machine  35 . 
         [0027]    Referring to  FIGS. 1 and 10 , in an eighth step  508 , the positioning assembly  20  is detached from the chamfering machine  35  and repositioned on a laser marking machine  36  via the first positioning portion  211  and the second positioning portion  221 . A sign “N” is then marked on the first workpiece  11  by the laser marking machine  36  in this embodiment. 
         [0028]    Referring to  FIGS. 1 and 11 , in a ninth step  509 , after the machining processes described, a final product  10  is achieved and detached from the positioning assembly  20 . 
         [0029]    In machining, the first workpiece  11  and the second workpiece  12  are always combined with the positioning assembly  20  when transferred between different machining devices. Therefore, there is no need to detach or reposition the first workpiece  11  and the second workpiece  12  from or to different positioning assemblies of the different machining devices, thereby providing machining with high efficiency and precision. In addition, the first workpiece  11  and the second workpiece  12  avoid damage thereto. The positioning assembly  20  can be substantially rectangular, so that the positioning assemblies  20  are easy for stacking and handling. 
         [0030]    It should be pointed out that, the above-described machining method of workpieces can also be applied for one workpiece or three or more workpieces. The positioning assembly  20  may also form more assembly portions  213  for assembling more workpieces, and one or more positioning portions  211 ,  221  for fixing onto the machining devices. The positioning portions  211 ,  221  may be positioning protrusions. In addition, a shape of the positioning assembly  20  can be designed according to shapes of workpieces. 
         [0031]    It is believed that the present embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the disclosure or sacrificing all of its material advantages.