Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is a friction test device for testing the friction performance of a coating of a cutting tool (24). The device comprises a rotary fixing mechanism, a cutting mechanism, a feed motion mechanism, a friction mechanism, a data collection mechanism and a pressure regulating mechanism. The rotary fixing mechanism comprises a three-jaw chuck (11), a first driving device used for driving the three-jaw chuck (11) to rotate in a circumferential direction, and a columnar workpiece (13), which is fixedly mounted on the three-jaw chuck (11) and used in a friction test. The cutting mechanism comprises a pedestal (21), a cutting base (22), a turret (23) mounted on the cutting base (22), and a cutting tool (24) mounted on the turret (23), wherein the cutting tool (24) is located beside the columnar workpiece (13). The friction test device can achieve a long testing duration while ensuring sufficient contact pressure.
A: A computer numerical control woodworking machine integrated with turning and engraving functions comprises a base (2), a cross beam (1), a vertical drive mechanism, a tool bit device, a cross drive mechanism, a longitudinal drive mechanism, and a workholding drive mechanism. The cross beam (1) is mounted at an upper portion of the base (2). The vertical drive mechanism is mounted on the cross beam (1), and comprises a first drive motor (6), a first motor securing base (7), a first slide block (5), a vertical guide-way (8), a first threaded rod (10), a first connection block (11), a vertical guide-way mounting plate (3), and a vertical carriage plate (4). The tool bit device comprises a tool bit rack (30), a turning tool rack (42), an engraving tool bit (41), a turning tool (43), a turning tool-securing plate (44), an adjusting screw (45), and a motor (35). The longitudinal drive mechanism comprises a longitudinal work platform (16), a longitudinal guide-way (23), a fourth slide block (22), a third drive motor (24), a third motor securing lower base (25), a third threaded rod (21), a third connection block (20), and a third bearing support block (19). The cross drive mechanism comprises a cross work platform (18), a cross guide-way (15), a third slide block (14), a second drive motor (26), a second motor securing base (27), a second threaded rod (17), a second connection block (13), and a second bearing support block (12).
B: A multi-purpose precision machine tool, having main structures comprising a machine tool body (1), and a first workpiece fixing mechanism, a second workpiece fixing mechanism, and a tool mechanism provided on the machine tool body (1). The first workpiece fixing mechanism and the second workpeice fixing mechanism respectively comprise an internal expanding clamp (8) and a soft-jaw chuck (9) for clamping a workpiece (14), so as to not only drive the workpiece (14) to rotate but also drive the workpiece (14) to perform horizontal and vertical linear displacement. Therefore, the internal expanding clamp (8) can first clamp the workpiece (14) to machine one end of the workpiece (14), and the then the soft-jaw chuck (9) clamps the other end of the workpiece (14) to machine the other end of the workpiece (14). Therefore, the workpiece (14) can be machined without being detached, and the machine tool features a simple structure and has high workpiece clamping conversion and machining efficiency.
C: A multifunctional pin-on-disk abrasion simulation experiment device, belonging to the technical field of friction and abrasion testing. The device comprises a frame, which is sequentially provided, from top to bottom, with a lead-screw slider lifting and loading system, a plurality of opposite grinding assemblies (5), a temperature chamber assembly (4) and a main shaft rotation system, with the plurality of opposite grinding assemblies (5) being arranged in the temperature chamber assembly (4). The device can carry out multiple opposite grinding experiments without the experiments affecting each other, and can also simultaneously carry out multiple opposite grinding experiments under the conditions of different rotation speeds, different contact pressures and the same temperature, without the experiments affecting each other, thus not only reducing experiment error, but also greatly improving the experiment efficiency. In the device, the temperature in the chamber of the temperature chamber assembly (4) can be changed by a user; the lead-screw slider lifting and loading system can separately and independently start the different opposite grinding assemblies (5) and can separately apply vertical loads to the different opposite grinding assemblies (5); and the main shaft rotation system can drive a friction disk to rotate and provide a corresponding torque.
D: Provided is a dual-spindle machine tool, comprising a machine base (30), and a machine tool cutting part (01) and machine tool spindle mechanism (02) arranged on the machine base (30); the machine cutting part (01) comprises a support frame (011), a translational motion frame (012), a lifting/lowering base (013), and a cutting tool apparatus (014); the support frame (011) is mounted on the base (30); the translational motion frame (012) is mounted on the support frame (011) by means of a translational motion drive apparatus; the lifting/lowering base (013) is mounted on the translational motion frame (012) by means of a lifting/lowering drive apparatus; the cutting tool apparatus (014) is mounted on the lifting/lowering base (013); the cutting tool apparatus (014) is equipped with a cutting tool for cutting a product; the number of machine tool spindle mechanisms (02) is two, and they are arranged side-by-side on the machine base (30); driven by the translational motion drive apparatus, the cutting tool can move between the two machine tool spindle mechanisms. When the cutting tool is machining the product on one of the two spindle mechanisms, a worker can unload the finished product on another spindle mechanism, then clamp the product to be processed on the spindle mechanism. Thus the processing efficiency of the machine tool can be improved.
Answer: C