Please select the most similar patent number from A, B, C and D. Which number is?
A cutting machine (100), comprising a base (10) and a cutting system (30), positioning and feeding system (40), material collecting system (50), and a control box (60), all disposed on the base (10). The cutting system (30) and positioning and feeding system (40) are both electrically connected to the control box (60). The cutting system (30) is used to cut a material, the positioning and feeding system (40) is used to position and move the material as needed for material processing, and the material collecting system (50) is used to collect and recycle the scrap material generated from cutting. The cutting system (30) comprises a explosion-proof motor (31), a revolving shaft (32), a power transmission belt (33) connected to one end of the revolving shaft (32) and to the explosion-proof motor (31), a saw blade (34) disposed on the other end of the revolving shaft (32), and a guard (35) covering the saw blade (34). The positioning and feeding system (40) comprises a servomotor (41) and a positioning jig (42) disposed on the servomotor (41). The positioning jig (42) is used to position or secure the material, and is driven to move by the servomotor (41) such that the material is cut by the saw blade (34). The provision of the guard (35) prevents high-temperature scrap material from flying out during the cutting process, enhancing safety. Movement of the material for cutting is automatically controlled by the positioning and feeding system (40), reducing manual labor and enhancing productivity.
A: A cutting device (20), comprising a cutting member (40) and a valve leaflet positioning mechanism (30). The cutting member (40) is provided with a cutting section (42) at a distal end, and the cutting section (42) is electrically connected to an ablation power supply at a proximal end; the cutting section (42) is used to cut a valve leaflet; and the valve leaflet positioning mechanism (30) is used to stabilize the position of the cut valve leaflet. Since the valve leaflet positioning mechanism (30) is capable of stabilizing the position of the cut valve leaflet, the cutting part (42) is placed on a valve leaflet to be cut and forms a radial cut on the cut valve leaflet by moving. The cut valve leaflet splits and forms an opening at a coronary artery, and may push open an original valve leaflet when a transcatheter heart valve is implanted. Therefore, the cut valve leaflet will not block the coronary artery orifice and will prevent the original valve leaflet from covering the coronary artery orifice during transcatheter aortic valve replacement and cause blocking. Also disclosed is a cutting system (100) provided with the cutting device (20).
B: Disclosed is a tapping machine (100), comprising a rack (10), a feeding module (20), an unloading module (50), a positioning fixture (60) mounted on the rack (10), a tapping device (40) docking with the positioning fixture (60), and a control unit, wherein the tapping device (40) comprises a positive tapping module (410), and the positive tapping module (410) comprises a plurality of tapping shafts (4103) and a plurality of first servo motors (4101) corresponding to the plurality of tapping shafts (4103) on a one-to-one basis. The control unit is connected to the feeding module (20), the unloading module (50), the positioning fixture (60) and the tapping device (40), and controls the feeding module (20), the unloading module (50), the positioning fixture (60) and the tapping device (40) to act in a predetermined order, thereby realizing a cycle of action for feeding, tapping and unloading. At the same time, the plurality of tapping shafts (4103) can simultaneously tap a plurality of positions of a workpiece, thus allowing the tapping time to be shortened greatly.
C: A cutting tool (100), comprises a housing (20); a motor (22) accommodated in the housing (20); a drive mechanism (23) connected to the motor (22) so as to drive a blade (24), the blade (24) having a blade plane; a bottom plate (136) connected to the housing (20), the bottom plate (136) comprising a first bottom plate (136) having a first bottom surface (138) and a second bottom plate (148) having a second bottom surface (152); an abutment surface (140), coplanar with the blade plane, is provided on at least one of the first bottom plate (136) and the second bottom plate (148), the abutment surface (140) is used for cooperating with a guide surface (111), the first bottom plate (136) and the second bottom plate (148) move relative to each other so as to expose the abutment surface (140). This cutting tool (100) operates very conveniently. Since the relative movement of the first bottom plate (136) and the second bottom plate (148) enables the exposure of the abutment surface (140), when cutting a workpiece, the abutment surface (140) cooperates with the guide surface (111), and then the cutting tool (100) moves to cut.
D: A tire material (100) conveying device, comprising a conveying frame (10), a lifting member (20), a positioning component, and a cutting component (40). The conveying frame (10) is provided with a cutting position. The tire material (100) is conveyed forwards on the conveying frame (10). The lifting member (20) is provided below the tire material (100), and can move from bottom to top to lift the tire material (100). The positioning component is provided above the tire material (100), and comprises a first pressure plate (31) and a second pressure plate (32) arranged at intervals. The first pressure plate (31) can release or press a tire component (100a). The cutting component (40) is provided above the conveying frame (10), and can move between the first pressure plate (31) and the second pressure plate (32) to cut the tire material (100) when both the first pressure plate (31) and the second pressure plate (32) are located at the pressing position.
Answer: C