Automatic testing device and method for torsional separating force of acetabular lining

Abstract

The invention relates to the technical field of medical implantation component quality detection, in particular to an automatic testing device and method for the torsional separating force of an acetabular lining, a six-claw electric control chuck and a pressure sensor A realize fixation of an acetabular lining and an acetabular cup combination, a transmission part enables a miniature electric drill electric grinding engraving machine to realize processing of uniformly distributed grooves of the acetabular lining, and a clamping part is used for clamping the acetabular lining; the miniature air blower removes chips, the transmission part and the vertical shaft torque servo motor enable a boss on the ball head to be matched with a groove, the ball head rotates to measure the transfer power value of the acetabular lining in the acetabular cup, and the device automatically completes actions of acetabular alignment, pressing, groove machining, chip removal, matching of the boss on the ball head and the groove in the acetabular lining, force measurement and the like. And the test quality and efficiency are improved through automation.

Description

Technical Field

[0001] The invention relates to the technical field of quality inspection of medical implant components, and in particular to an automatic testing device and method for torsional separation force of an acetabulum liner. Background Art

[0002] The human hip joint is a spherical joint, that is, a spherical femoral head and a bowl-shaped acetabulum. The artificial acetabulum is composed of an acetabular cup and an acetabular liner, also known as a combined acetabulum. The acetabular cup provides additional support or reinforcement for the acetabular liner. The external geometry of the acetabular liner matches the acetabular cup. The locking mechanism provides mechanical resistance to the movement between the acetabular liner and the acetabular cup, such as slots, gear rings, etc., to limit the rotation, translation and axial movement between the two, so that the two have integrity. If the locking mechanism is not perfect, it will cause micro-movement between the acetabular liner and the acetabular cup, causing wear, dents and scratches on the dorsal side of the acetabular liner, which will accelerate the premature failure of the locking mechanism, leading to bone dissolution and implant failure. Therefore, the quality of the acetabular components is of great concern. Testing is particularly important. Among them, testing the torsional separation force between the acetabular liner and the acetabular cup is to evaluate the resistance generated by the locking mechanism when a strong friction force attempts to cause the acetabular liner to twist in the acetabular cup. The method is: after the acetabular liner is correctly assembled in the acetabular cup, at least four positions on the top of the acetabular cup are evenly pressed, and at least four evenly spaced grooves at specified positions are machined on the inner surface of the acetabular liner. Then, a ball head suitable for the diameter of the acetabular liner is placed, and a boss matching the groove on the acetabular liner is provided on the ball head. After the ball head is placed in the acetabular liner, torque is applied to the ball head along the polar axis of the acetabular liner to measure the resistance value of the locking mechanism between the acetabular liner and the acetabular cup. There is currently no automatic testing device and method for use specifically for the torsional separation force of the acetabular liner.

[0003] To this end, the present application designs an automatic testing device and method for the torsional separation force of an acetabular liner to solve the above-mentioned problems. Summary of the invention

[0004] In order to make up for the deficiencies in the prior art, the present invention provides an automatic testing device and method for the torsional separation force of an acetabular liner.

[0005] An automatic test device for torsional separation force of an acetabular liner, comprising an acetabular liner and acetabular cup combined fixing device, an acetabular liner groove processing device and a torsional separation force test device, characterized in that: The acetabular liner and acetabular cup combined fixing device is arranged at the center of the horizontal platform, and the acetabular liner and acetabular cup are fixed at the center of the horizontal platform by means of a lifting device, a multi-claw chuck and a matching sensor; The acetabular liner groove processing device is arranged on one side of the horizontal platform, wherein a milling cutter with a movable position is arranged therein for processing the groove of the acetabular liner; The torsional separation force testing device is arranged on the other side of the horizontal platform, wherein a ball head with a movable position is arranged, and a torsional force test is performed after the boss on the ball head is inserted into the groove.

[0006] Furthermore, in order to better realize the present invention, the acetabular liner and acetabular cup combined fixing device includes a six-claw electric-controlled chuck, the horizontal platform is placed on the workbench through the legs with height adjustment knobs at the bottom, and a six-claw electric-controlled chuck is installed above the center of the horizontal platform. A hole is opened at the center of the horizontal platform, and a vertical telescopic shaft K is inserted into the hole. The vertical telescopic shaft K is driven up and down by a vertical telescopic shaft servo motor K. A round tray is horizontally fixed on the top of the vertical telescopic shaft K, and a pressure sensor B is connected to the round tray. An acetabular cup with an opening facing upward is placed on the pressure sensor B, and the six-claw electric-controlled chuck clamps the upper part of the acetabular cup.

[0007] Furthermore, in order to better realize the present invention, a pressure sensor A is provided at the end of the horizontally movable claw of the six-claw electric-controlled chuck, and an upper right-angled edge is opened on the horizontally movable claw. The pressure sensor A contacts the upper side surface of the acetabular cup, and the upper right-angled edge contacts the upper top surface of the acetabular cup; the horizontal axis J is inserted into the transmission system of the six-claw electric-controlled chuck through interference fit, and the horizontal axis servo motor J that drives the horizontal axis J is fixed on the horizontal platform.

[0008] Furthermore, in order to better realize the present invention, the acetabular liner groove processing device includes a vertical tube A connected to a horizontal platform, the top of the vertical tube A is connected to a vertical axis servo motor A through a flange A, the vertical axis A of the vertical axis servo motor A is connected to a horizontal telescopic axis servo motor B through a flange B, the horizontal telescopic axis B of the horizontal telescopic axis servo motor B is connected to a vertical telescopic axis servo motor C through a flange C, the vertical telescopic axis C of the vertical telescopic axis servo motor C is connected to a vertical axis servo motor D through a flange D, the vertical axis D of the vertical axis servo motor D is connected to a vertical step shaft through a flange E, the upper half of the vertical step shaft is connected to a retaining ring A, a camera A is installed on the retaining ring A, the lower half of the vertical step shaft is connected to a retaining ring B, a blower is installed on the retaining ring B, a micro electric drill and electric grinder engraving machine is installed at the bottom of the vertical step shaft, the micro electric drill and electric grinder engraving machine is connected to a milling cutter, and the milling cutter is used to process the groove on the acetabular liner.

[0009] Furthermore, in order to better realize the present invention, the torsional separation force testing device includes a vertical tube B connected to the horizontal platform, the top of the vertical tube B is connected to the vertical axis servo motor F through a flange F, the vertical axis of the vertical axis servo motor F is connected to the horizontal telescopic axis servo motor G through a flange G, the horizontal telescopic axis G of the horizontal telescopic axis servo motor G is connected to the vertical telescopic axis servo motor H through a flange H, the vertical telescopic axis H of the vertical telescopic axis servo motor H is connected to the vertical axis torque servo motor I through a flange I, the vertical axis I of the vertical axis torque servo motor I, and the bottom of the vertical axis I is connected to a ball head through a flange J, and a boss is provided on the ball head.

[0010] Furthermore, in order to better implement the present invention, a clamping ring C is connected to the vertical axis I, and a camera B is installed on the clamping ring C.

[0011] An automatic test method for torsional separation force of acetabular liner: The tester only needs to place the assembled acetabulum on the cross center line and the center of the concentric circle mark on the pressure sensor B, and press the test start button in the touch screen PLC controller. The device automatically completes the actions of acetabulum alignment, pressing and holding, groove processing, chip cleaning, matching the boss on the ball head with the groove in the acetabulum liner, and force measurement.

[0012] Furthermore, in order to better realize the present invention, the specific steps of aligning and holding the acetabulum are as follows: after the acetabulum liner is correctly assembled in the acetabulum cup, it is placed at the center of the pressure sensor B with the cup mouth facing upwards, and the start button in the touch screen PLC controller is pressed, and each electronic control component enters the working state. The touch screen PLC controller controls the horizontal axis servo motor J to work so that the six horizontal moving claws move slowly toward the center. When the six pressure sensors A lightly touch the outer major diameter of the acetabulum cup, the touch screen PLC controller will receive the tiny force value transmitted by the pressure sensor A. At this time, the touch screen PLC controller controls the horizontal axis servo motor J to work in the opposite direction so that the six moving claws move slowly away from the center. At this time, the touch screen PLC controller will slowly reduce the pressure value transmitted by the pressure sensor A to zero, and repeat this 1 to several times. When the pressure values ​​transmitted by the six pressure sensors A received by the touch screen PLC controller are all The uniformity conforms to the programmed setting range, that is, the synchronization of the increase and decrease of the six pressure values ​​conforms to the setting range. At this time, the vertical center line of the combined acetabular liner and acetabular cup is coaxial with the vertical center line of the six-claw electric control chuck and the vertical center line of the vertical telescopic axis servo motor K. After meeting this condition, the touch screen PLC controller controls the horizontal axis servo motor J to work so that the pressure values ​​of the six pressure sensors A drop to zero again, and then the servo motor J stops working; the touch screen PLC controller controls the vertical telescopic axis servo motor K to work so that the vertical telescopic axis K rises, so that the pressure sensor B on the round tray pushes the combination of the acetabular cup and the acetabular liner to rise synchronously, and the annular opening on the top of the acetabular cup contacts the upper right-angle edges on the six evenly distributed horizontal moving claws and the contact areas are the same. When the pressure value transmitted by the pressure sensor B reaches the programmed setting value, the touch screen PLC controller controls the vertical telescopic axis servo motor K to stop working.

[0013] Further, in order to better realize the present invention, the specific steps of the groove processing and chip cleaning are as follows: the touch screen PLC controller controls the vertical axis servo motor A to work according to the programming, so that the horizontal telescopic axis servo motor B rotates horizontally, controls the horizontal telescopic axis servo motor B to work, so that the vertical telescopic axis servo motor C moves horizontally and linearly, controls the vertical telescopic axis servo motor C to work so that the vertical axis servo motor D moves vertically up and down, and controls the vertical axis servo motor D to work so that the component fixed under the flange can rotate, thereby moving the milling cutter to the programmed set position, the touch screen PLC controller starts the micro electric drill and electric grinder engraving machine to work, so that the milling cutter rotates, and the touch screen PLC controller controls the vertical axis servo motor A, the horizontal telescopic axis servo motor B, the vertical telescopic axis servo motor C, and the vertical axis servo motor D with reference to the image data of camera A and the programmed displacement setting to complete the milling of the uniformly distributed grooves of the acetabular liner. After the groove processing and milling are completed, the micro electric drill and electric grinder engraving machine stops working, and the touch screen PLC controller controls the relevant motors to work according to the image of camera A, and turns on the blower to blow away the processing chips in the acetabular liner. After the chips are blown away, the blower stops working.

[0014] Further, in order to better realize the present invention, the specific steps of matching the boss on the ball head with the groove in the acetabular liner and measuring the force are as follows: the touch screen PLC controller refers to the image data of camera B and the programmed displacement setting, controls the relevant motor to move the boss on the ball head to the groove on the acetabular liner, and the touch screen PLC controller controls the vertical axis torque servo motor I to work, and measures the maximum torque value of the acetabular liner when it rotates in the acetabular cup. Repeat the above operation 5 times, test the torque of the acetabular liners after 5 combinations when they rotate from the acetabular cup, and the touch screen PLC controller automatically gives the test results.

[0015] The beneficial effects of the present invention are: The invention can automatically complete the actions of acetabulum alignment, pressing and holding, groove processing, chip cleaning, matching of the boss on the ball head with the groove in the acetabulum liner, force measurement, etc., and the automation improves the test quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the present invention; Figure 2 A top view of the present invention; Figure 3 is a diagram of the torsion state of the acetabular liner of the present invention; Figure 4 For the present invention Figure 1 Middle AA section enlarged view; Figure 5 It is the electric control principle diagram of the present invention.

[0017] In the figure, 1. Workbench, 2. Level, 3. Vertical tube A, 4. Touch screen PLC controller, 5. Flange A, 6. Vertical axis servo motor A, 7. Vertical axis A, 8. Flange B, 9. Horizontal telescopic axis B, 10. Horizontal telescopic axis servo motor B, 11. Flange C, 12. Snap ring A, 13. Camera A, 14. Micro electric drill and grinder engraving machine, 15. Milling cutter, 16. Upper right angle edge, 17. Pressure sensor A, 18. Vertical telescopic axis servo motor C, 19. Vertical telescopic axis C, 20. Flange D, 21. Vertical axis servo motor D, 22. Vertical axis D, 23. Flange E, 24. Vertical stepped shaft, 25. Snap ring B, 26. Blower, 27. Groove, 28. Acetabular liner, 29. Horizontal moving claw, 30. Six-claw electric control chuck, 31. Flange F, 32. Method Blue plate I, 33, vertical axis F, 34, flange G, 35, flange H, 36, vertical telescopic axis H, 37, horizontal telescopic axis servo motor G, 38, horizontal telescopic axis G, 39, vertical axis servo motor F, 40, retaining ring C, 41, camera B, 42, vertical axis torque servo motor I, 43, ball head, 44, boss, 45, vertical tube B, 46, horizontal axis J, 47, horizontal axis servo motor J, 48, horizontal platform, 49, height adjustment knob, 50, pressure sensor B, 51, round tray, 52, vertical telescopic axis K, 53, vertical telescopic axis servo motor K, 54, hole, 55, acetabular cup, 56, vertical telescopic axis servo motor H, 57, vertical axis I, 58, flange J, 59, reinforcement rib, 60, flange K, 61, output shaft of micro electric drill, electric grinder and engraving machine. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0020] Figure 1-Figure 5This is a specific embodiment of the present invention. In this embodiment, the milling cutter 15 is fixed on the micro-electric drill and electric grinder engraving machine output shaft 61 of the micro-electric drill and electric grinder engraving machine 14. The micro-electric drill and electric grinder engraving machine 14 is fixed to the lower end of the vertical step shaft 24 through a flange K60 and a reinforcing rib 59. A blower 26 for downward blowing is fixed to the middle and lower part of the vertical step shaft 24 through a clamping ring B25. A camera A13 for downward monitoring is fixed to the middle and upper part of the vertical step shaft 24 through a clamping ring A12. The top of the vertical step shaft 24 is fixed to a flange E23 by bolts. The flange E23 is fixed to the lower end of the vertical axis D22 of the vertical axis servo motor D21. The vertical axis servo motor D21 is fixed to the lower end of the flange D20 by bolts. The flange D20 is fixed to the lower end of the vertical telescopic shaft C19. The vertical telescopic shaft C1 9 is the axis of the vertical telescopic shaft servo motor C18, the vertical telescopic shaft servo motor C18 is fixed on the flange C11 by bolts, the flange C11 is fixed on the end of the horizontal telescopic shaft B9, the horizontal telescopic shaft B9 is the axis of the horizontal telescopic shaft servo motor B10, the horizontal telescopic shaft servo motor B10 is fixed on the flange B8 by bolts, the flange B8 is fixed to the upper end of the vertical shaft A7 of the vertical shaft servo motor A6, the vertical shaft servo motor A6 is fixed on the flange A5 by bolts, the flange A5 is welded on the vertical pipe A3, the vertical pipe A3 is fixed on the left side of the horizontal platform 48 by bolts, the horizontal platform 48 is provided with a spirit level 2, and the four corners of the lower surface of the horizontal platform 48 are respectively provided with height adjustment knobs 49, and the horizontal platform 48 can be in a horizontal state by observing the spirit level 2 and adjusting the height adjustment knobs 49. A hole 54 is provided at the center of the horizontal platform 48, into which a vertical telescopic shaft K52 can be inserted, and the vertical telescopic shaft K52 is the shaft of the vertical telescopic shaft servo motor K53, which is fixed to the upper surface of the horizontal platform 48 by bolts, and a horizontal round tray 51 is fixed on the top of the vertical telescopic shaft K52, and a pressure sensor B50 is installed on the horizontal round tray 51, and a cross center line indicating the center and a plurality of concentric circles are provided on the upper surface of the pressure sensor B50. The pressure sensor B50, the round tray 51 and the vertical telescopic shaft servo motor K53 are all located in the center hole of the six-claw electric control chuck 30, and the six-claw electric control chuck 30 is fixed to the horizontal platform 48 by bolts, and the vertical center line of the six-claw electric control chuck 30 is coaxial with the vertical center line of the vertical telescopic shaft servo motor K53.A downward right angle is provided on the end of each horizontally movable claw 29 on the six-claw electric-controlled chuck 30, i.e., the claw 29 close to one end of the vertical center line of the chuck 30, wherein the upper right-angle side 16 is horizontal, and the pressure sensor A17 is fixed on the lower right-angle side. The six-claw electric-controlled chuck 30 is a common component of the prior art. The difference is that the original manual control is changed to electric control. In addition, the original clamping end of the movable claw of the six-claw electric-controlled chuck is now processed with a downward right angle, wherein the upper right-angle side 16 is horizontal, and the pressure sensor A17 is fixed on the lower right-angle side. The end of the horizontal axis J46 of the horizontal-axis servo motor J47 is a regular hexagon. The regular hexagon of the end of the horizontal axis J46 is inserted into the transmission system of the six-claw electric-controlled chuck 30 through interference fit, and the horizontal-axis servo motor J47 is fixed on the horizontal platform 48 by bolts. A vertical pipe B45 is also fixed on the right side of the horizontal platform 48 by bolts. A flange F31 is welded on the top of the vertical pipe B45. The flange F31 is fixed to the vertical axis servo motor F39 by bolts. A flange G34 is fixed on the top of the vertical axis F33. The flange G34 is fixed to the horizontal telescopic axis servo motor G37 by bolts. The end of the horizontal telescopic axis G38 is fixed to the flange H35. The flange H35 is fixed to the vertical telescopic axis servo motor H56 by bolts. The lower end of the vertical telescopic axis H36 is fixed to the flange Disk I32, flange I32 is fixed to the vertical axis torque servo motor I42 by bolts, the lower end of the vertical axis I57 of the vertical axis torque servo motor I42 is fixed to the flange J58, the flange J58 is connected to the ball head 43 by bolts, the diameter of the ball head 43 is the same as the inner diameter of the acetabulum liner 28, the ball head 43 has evenly distributed bosses 44, the size and position of the bosses 44 match the evenly distributed grooves 27 on the acetabulum liner 28, that is, the evenly distributed bosses 44 on the ball head 43 can be inserted into the evenly distributed grooves 27 of the acetabulum liner 28 from top to bottom. Vertical axis servo motor A6, horizontal telescopic axis servo motor B10, vertical telescopic axis servo motor C18, vertical axis servo motor D21, camera A13, blower 26, micro electric drill and electric grinder engraving machine 14, pressure sensor A17, pressure sensor B50, vertical telescopic axis servo motor K53, horizontal axis servo motor J47, vertical axis servo motor F39, horizontal telescopic axis servo motor G37, vertical telescopic axis servo motor H56, vertical axis torque servo motor I42 and other electrical control wires are all connected to the touch screen PLC controller 4, and the automatic test control program and image analysis software are input into the touch screen PLC controller 4.

[0021] The method of using this embodiment is as follows: After the acetabular liner 28 is properly assembled in the acetabular cup 55, it is placed at the center of the pressure sensor B50 with the cup opening facing upward. Figure 1, press the start button in the touch screen PLC controller 4, and each electronic control component enters the working state. The touch screen PLC controller 4 controls the horizontal axis servo motor J47 to work so that the six horizontal moving claws 29 move slowly toward the center. When the six pressure sensors A17 slightly touch the outer major diameter of the acetabular cup 55, the touch screen PLC controller 4 will receive the tiny force value transmitted by the pressure sensor A17. At this time, the touch screen PLC controller 4 controls the servo motor J47 to work in the reverse direction so that the six moving claws 29 move slowly away from the center. At this time, the touch screen PLC controller 4 will receive the pressure value transmitted by the pressure sensor A17 and slowly decrease. To zero, and repeat this 1 to several times. When the uniformity of the pressure values ​​transmitted by the six pressure sensors A17 received by the touch screen PLC controller 4 meets the programmed setting range, that is, the synchronization of increase and decrease of the six pressure values ​​meets the setting range, at this time, the vertical center line of the combined acetabular liner 28 and acetabular cup 55 is coaxial with the vertical center line of the six-jaw electric control chuck 30 and the vertical center line of the vertical telescopic shaft servo motor K53. After this condition is met, the touch screen PLC controller 4 controls the horizontal axis servo motor J47 to work so that the pressure values ​​of the six pressure sensors A17 drop to zero again, and then the horizontal axis servo motor J47 stops working. The touch screen PLC controller 4 controls the vertical telescopic shaft servo motor K53 to work, so that the vertical telescopic shaft K52 rises, and the pressure sensor B50 on the round tray 51 pushes the combination of the acetabular cup 55 and the acetabular liner 28 to rise synchronously. The top annular opening of the acetabular cup 55 contacts the upper right-angle edges 16 on the six evenly distributed horizontal movable claws 29 and the contact areas are the same. When the pressure value transmitted by the pressure sensor B50 reaches the programmed set value, the touch screen PLC controller 4 controls the vertical telescopic shaft servo motor K53 to stop working. The touch screen PLC controller 4 controls the vertical axis servo motor A6 according to the programming to make the horizontal telescopic axis servo motor B10 rotate horizontally, controls the horizontal telescopic axis servo motor B10 to make the vertical telescopic axis servo motor C18 move horizontally, controls the vertical telescopic axis servo motor C18 to make the vertical axis servo motor D21 move vertically up and down, and controls the vertical axis servo motor D21 to make the component fixed under the flange 23 rotate, thereby moving the milling cutter 15 to the programmed set position, and the touch screen PLC controller 4 starts the micro electric drill, electric grinder and engraving machine 14 to make the milling cutter 15 rotate, and the touch screen The PLC controller 4 controls the related actions of the vertical axis servo motor A (6), the horizontal telescopic axis servo motor B (10), the vertical telescopic axis servo motor C (18), and the vertical axis servo motor D (21) with reference to the image data of the camera A13 and the programmed displacement setting to complete the milling of the evenly distributed grooves 27 of the acetabular liner 28. After the milling of the grooves 27 is completed, the micro electric drill and electric grinder 14 stops working, and the touch screen PLC controller 4 controls the operation of the related motors according to the image of the camera A13, and turns on the blower 26 to blow away the machining chips in the acetabular liner 28. After the chips are blown away, the blower 26 stops working.The touch screen PLC controller 4 refers to the image data of the camera B41 and the programmed displacement setting, and controls the operation of the relevant motor to move the boss 44 on the ball head 43 into the groove 27 on the acetabulum liner 28, see. Figure 3 The touch screen PLC controller 4 controls the vertical axis torque servo motor 142 to work, and measures the maximum torque value of the acetabular liner 28 when it rotates in the acetabular cup 55. Repeat the above operation 5 times, and test the torque of the acetabular liners 28 after 5 combinations when they rotate from the acetabular cup 55, and the touch screen PLC controller 4 automatically gives the test results.

[0022] The tester only needs to place the assembled acetabulum on the cross center line and the center of the concentric circle mark on the pressure sensor B50, and press the test start button in the touch screen PLC controller 4. The device automatically completes the actions of acetabulum alignment, pressing and holding, groove 27 processing, chip cleaning, matching of the boss 44 on the ball head 43 with the groove 27 in the acetabulum liner 28, force measurement, etc. Automation improves the test quality and efficiency.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. An automatic test device for torsional separation force of an acetabular liner, comprising an acetabular liner and acetabular cup combined fixing device, an acetabular liner groove processing device and a torsional separation force testing device, characterized in that: The acetabular liner and acetabular cup combined fixing device is arranged at the center of the horizontal platform (48), and the acetabular liner (28) and the acetabular cup (55) are fixed at the center of the horizontal platform (48) by means of a lifting device, a multi-claw chuck and a matching sensor; The acetabular liner groove processing device is arranged on one side of the horizontal platform (48), wherein a milling cutter (15) with a movable position is arranged therein for processing the groove (27) on the acetabular liner (28); The torsional separation force testing device is arranged on the other side of the horizontal platform (48), wherein a ball head (43) is arranged in a movable position, and a torsional force test is performed after the boss (44) on the ball head (43) is inserted into the groove (27).

2. The automatic test device for acetabular liner torsion separation force according to claim 1, characterized in that: The acetabular liner and acetabular cup combined fixing device comprises a six-claw electric-controlled chuck (30), the horizontal platform (48) is placed on the workbench (1) via legs with height adjustment knobs (49) at the bottom, the six-claw electric-controlled chuck (30) is installed above the center of the horizontal platform (48), a hole is opened at the center of the horizontal platform (48), a vertical telescopic shaft K (52) is inserted into the hole (54), the vertical telescopic shaft K (52) is driven by a vertical telescopic shaft servo motor K (53) to move up and down, a round tray (51) is horizontally fixed on the top of the vertical telescopic shaft K (52), a pressure sensor B (50) is connected to the round tray (51), an acetabular cup (55) with its opening facing upward is placed on the pressure sensor B (50), and the six-claw electric-controlled chuck (30) clamps the upper part of the acetabular cup (55).

3. The automatic test device for acetabular liner torsion separation force according to claim 2, characterized in that: A pressure sensor A (17) is provided at the end of the horizontal movable claw (29) of the six-claw electric control chuck (30), and an upper right-angle edge (16) is formed on the horizontal movable claw (29), the pressure sensor A (17) abuts against the upper side surface of the acetabular cup (55), and the upper right-angle edge (16) abuts against the upper top surface of the acetabular cup (55); The horizontal shaft J (46) is inserted into the transmission system of the six-claw electric control chuck (30) through interference fit, and the horizontal shaft servo motor J (47) driving the horizontal shaft J (46) is fixed on the horizontal platform (48).

4. The automatic test device for acetabular liner torsion separation force according to claim 1, characterized in that: The acetabulum liner groove processing device comprises a vertical tube A (3) connected to a horizontal platform (48); the top of the vertical tube A (3) is connected to a vertical axis servo motor A (6) via a flange A (5); the vertical axis A (7) of the vertical axis servo motor A (6) is connected to a horizontal telescopic axis servo motor B (10) via a flange B (8); the horizontal telescopic axis B (9) of the horizontal telescopic axis servo motor B (10) is connected to a vertical telescopic axis servo motor C (18) via a flange C (11); the vertical telescopic axis C (19) of the vertical telescopic axis servo motor C (18) is connected to the vertical axis servo motor D (20) via a flange D (21). (21), the vertical axis D (22) of the vertical axis servo motor D (21) is connected to the vertical step axis (24) through the flange E (23), the upper part of the vertical step axis (24) is connected to the clamping ring A (12), the clamping ring A (12) is equipped with a camera A (13), the lower part of the vertical step axis (24) is connected to the clamping ring B (25), the clamping ring B (25) is equipped with a blower (26), a micro electric drill and electric grinder engraving machine (14) is installed at the bottom of the vertical step axis (24), the micro electric drill and electric grinder engraving machine (14) is connected to the milling cutter (15), and the milling cutter (15) is used to process the groove (27) on the acetabular liner (28).

5. The automatic test device for acetabular liner torsion separation force according to claim 1, characterized in that: The torsional separation force testing device comprises a vertical tube B (45) connected to a horizontal platform (48); the top of the vertical tube B (45) is connected to a vertical axis servo motor F (39) via a flange F (31); the vertical axis F (33) of the vertical axis servo motor F (39) is connected to a horizontal telescopic axis servo motor G (37) via a flange G (34); the horizontal telescopic axis G (38) of the horizontal telescopic axis servo motor G (37) is connected to a vertical telescopic axis servo motor H (56) via a flange H (35); the vertical telescopic axis H (36) of the vertical telescopic axis servo motor H (56) is connected to a vertical axis torque servo motor I (42) via a flange I (32); the vertical axis I (57) of the vertical axis torque servo motor I (42); the bottom of the vertical axis I (57) is connected to a ball head (43) via a flange J (58); and a boss (44) is provided on the ball head (43).

6. The automatic test device for acetabular liner torsion separation force according to claim 5, characterized in that: A clamping ring C (40) is connected to the vertical axis I (57), and a camera B (41) is mounted on the clamping ring C (40).

7. An automatic test method for torsional separation force of an acetabular liner, based on the automatic test device for torsional separation force of an acetabular liner according to claim 1, characterized in that: The tester places the assembled acetabulum on the center line of the cross and the center of the concentric circle mark on the pressure sensor B (50), and presses the test start button in the touch screen PLC controller (4). The device automatically completes the actions of acetabulum alignment, pressing, groove (27) processing, chip cleaning, matching of the boss (44) on the ball head (43) with the groove (27) in the acetabulum liner (28), and force measurement.

8. The method for automatically testing the torsional separation force of the acetabular liner according to claim 7, characterized in that: The specific steps of aligning and holding the acetabulum are as follows: after the acetabulum liner (28) is correctly assembled in the acetabulum cup (55), the cup mouth is placed upward at the center position of the pressure sensor B (50), and the start button in the touch screen PLC controller (4) is pressed, and each electronic control component enters the working state. The touch screen PLC controller (4) controls the horizontal axis servo motor J (47) to work so that the six horizontal movable claws (29) move slowly toward the center. When the six pressure sensors A (17) slightly contact the outer major diameter of the acetabulum cup (55), the touch screen PLC controller (4) will receive the small force value transmitted by the pressure sensor A (17). At this time, the touch screen PLC controller (4) controls the horizontal axis servo motor J (47) to work in the reverse direction so that the six movable claws (29) move slowly away from the center. At this time, the touch screen PLC controller (4) will slowly reduce the pressure value transmitted by the pressure sensor A (17) to zero. This is repeated 1 to several times. When the uniformity of the pressure values ​​transmitted by the six pressure sensors A (17) received by the touch screen PLC controller (4) meets the programmed setting range, that is, the six pressure sensors A (17) are in the same range. The synchronization of force increase and decrease is within the set range. At this time, the vertical center line of the combined acetabular liner (28) and acetabular cup (55) is coaxial with the vertical center line of the six-claw electric control chuck (30) and the vertical center line of the vertical telescopic shaft servo motor K (53). After this condition is met, the touch screen PLC controller (4) controls the horizontal axis servo motor J (47) to work so that the pressure values ​​of the six pressure sensors A (17) are reduced to zero again, and then the horizontal axis servo motor J (47) stops working; the touch screen PLC controller (4) controls the vertical The telescopic shaft servo motor K (53) operates to move the vertical telescopic shaft K (52) upward, so that the pressure sensor B (50) on the round tray (51) pushes the combination of the acetabular cup (55) and the acetabular liner (28) to move upward synchronously, and the top annular opening of the acetabular cup (55) contacts the upper right-angle edges (16) on the six evenly distributed horizontal movable claws (29) with the same contact area. When the pressure value transmitted by the pressure sensor B (50) reaches the programmed set value, the touch screen PLC controller (4) controls the servo motor K (53) to stop working.

9. The method for automatically testing the torsional separation force of the acetabular liner according to claim 7, characterized in that: The specific steps of machining and chip removal of the groove (27) are as follows: the touch screen PLC controller (4) controls the vertical axis servo motor A (6) to work according to programming, so that the horizontal telescopic axis servo motor B (10) rotates horizontally; controls the horizontal telescopic axis servo motor B (10) to work, so that the vertical telescopic axis servo motor C (18) moves horizontally and linearly; controls the vertical telescopic axis servo motor C (18) to work so that the vertical axis servo motor D (21) moves vertically up and down; controls the vertical axis servo motor D (21) to work so that the component fixed under the flange (23) rotates, thereby moving the milling cutter (15) to a programmed set position; the touch screen PLC controller (4) starts the micro electric drill, electric grinder and engraving machine (14) to work; The milling cutter (15) is rotated, and the touch screen PLC controller (4) controls the related actions of the vertical axis servo motor A (6), the horizontal telescopic axis servo motor B (10), the vertical telescopic axis servo motor C (18), and the vertical axis servo motor D (21) with reference to the image data of the camera A (13) and the programmed displacement setting to complete the milling of the evenly distributed grooves (27) of the acetabular liner (28). After the grooves (27) are milled, the micro electric drill and electric grinder (14) stop working, and the touch screen PLC controller (4) controls the related motors to work according to the image of the camera A (13), and turns on the blower (26) to blow away the machining chips in the acetabular liner (28). After the chips are blown away, the blower (26) stops working.

10. The method for automatically testing the torsional separation force of the acetabular liner according to claim 7, characterized in that: The specific steps of matching the boss (44) on the ball head (43) with the groove (27) in the acetabular liner (28) and measuring the force are as follows: the touch screen PLC controller (4) refers to the image data of the camera B (41) and the programmed displacement setting to control the operation of the relevant motor to move the boss (44) on the ball head (43) into the groove (27) on the acetabular liner (28); the touch screen PLC controller (4) controls the vertical axis torque servo motor I (42) to operate and measure the maximum torque value of the acetabular liner (28) when it rotates in the acetabular cup (55); repeat the above operation 5 times to test the torque of the acetabular liners (28) after 5 combinations when they rotate from the acetabular cup (55), and the touch screen PLC controller (4) automatically gives the test results.

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