Equal division and oblique cutting mechanism and cutting method for femoral stem prosthesis centering device

Abstract

The present invention discloses an equal - division bevel - cutting mechanism for a femoral stem prosthesis centering device, comprising: a downward - pressing assembly including a clamping member; a lifting and rotating mechanism including a lifting member, a lifting driving mechanism for driving the lifting member to move towards or away from the clamping member, and a rotating driving mechanism for driving the lifting member to rotate; a bevel - cutting mechanism including a tool holder located on the side of the lifting member, a cutting tool fixed to the end of the tool holder, a base rotatably connected to the tool holder through a rotating shaft, and a tool - holder driving mechanism for driving the tool holder to rotate around the rotating shaft; the clamping member and the lifting member have opposite centering - device workpiece clamping surfaces. This equal - division bevel - cutting mechanism for the femoral stem prosthesis centering device can achieve circumferential equal - division bevel - cutting of the centering - device workpiece. The present invention also discloses a cutting method for a femoral stem prosthesis centering device based on the equal - division bevel - cutting mechanism for the femoral stem prosthesis centering device.

Description

Technical Field

[0001] The present invention relates to the technical field of automated production, and particularly relates to an equal - division oblique - cutting mechanism and a cutting method for a femoral stem prosthesis centering device. Background Art

[0002] In cemented hip arthroplasty, in order to ensure that the femoral stem prosthesis is placed correctly and avoid phenomena such as femoral stem skew, uneven cement layer in the medullary cavity, and rotation of the femoral stem in the medullary cavity, a centering device needs to be implanted into the femoral medullary cavity. The basic structure of the centering device includes a central protrusion and an anti - rotation wing portion surrounding the outer periphery of the central protrusion. The anti - rotation wing portion is obtained by circumferentially equally dividing and cutting a planar disk - shaped workpiece, and then bending and deforming it in a first direction opposite to the direction of the central protrusion. In the use state, the anti - rotation wing portion surrounds the outer periphery of the end of the femoral stem.

[0003] The cutting of the planar disk - shaped workpiece has the following technical difficulties: First, the diameter of the central protrusion part is small, the contact surface between the clamping mechanism and the workpiece to be processed is small, and it is easy to slip, resulting in angular differences in circumferential lobing, which in turn affects the centering effect of the centering device; Second, the cutting surface of the circumferential lobing is a radially curved surface and has an included angle with the disk surface. The mechanism in the prior art that simultaneously punches multiple punching surfaces perpendicular to the disk surface is not applicable; Third, the central circular depression and protrusion are provided on the relative disk surface of the centering device workpiece, and it is difficult to control the equal - division of the lobing angle. Unequal lobing angles will result in defective products. Summary of the Invention

[0004] One of the purposes of the present invention is to overcome the defects existing in the prior art and provide an equal - division oblique - cutting mechanism for a femoral stem prosthesis centering device.

[0005] To achieve the above - mentioned technical effects, the technical solution of the present invention is as follows: An equal - division oblique - cutting mechanism for a femoral stem prosthesis centering device includes:

[0006] A downward - pressing assembly, including a clamping member;

[0007] A jacking and rotating mechanism, including a jacking member, a jacking driving mechanism for driving the jacking member to move towards or away from the clamping member, and a rotating driving mechanism for driving the jacking member to rotate;

[0008] An oblique - cutting mechanism, including a tool holder located on the side of the jacking member, a cutting tool fixed to the end of the tool holder, a base rotatably connected to the tool holder through a rotating shaft, and a tool - holder driving mechanism for driving the tool holder to rotate around the rotating shaft;

[0009] The clamping member and the jacking member have opposite centering - device workpiece clamping surfaces.

[0010] Preferably, the base is connected to a translation mechanism; the translation mechanism drives the rotating shaft to move towards or away from the rotation axis of the jacking member.

[0011] Preferably, the tool holder driving mechanism includes a first turntable, a first turntable driving mechanism for driving the first turntable to rotate, and an eccentric shaft provided on the first turntable;

[0012] The tool holder is provided with a guide rail, the extending direction of the guide rail is perpendicular to the axial direction of the rotating shaft, and the eccentric shaft is rotatably arranged in the guide rail and moves along the guide rail.

[0013] Preferably, the pressing-down assembly includes a pressing-down seat, the clamping member is rotatably connected to the pressing-down seat, and the rotation axes of the clamping member and the jacking member coincide.

[0014] Preferably, the jacking member is rotatably connected to the jacking seat, the rotation driving mechanism is fixedly connected to the jacking seat, and the jacking driving mechanism drives the jacking seat to move towards or away from the clamping member.

[0015] Preferably, an acute included angle is formed between the extending direction of the cutting edge of the cutting tool and the jacking direction of the jacking member.

[0016] Preferably, the tool holder is provided with a limiting groove for accommodating the outer edge of the centralizer workpiece, and the first notch of the limiting groove is arranged opposite to the groove bottom; the cutting tool is blocked at the side opposite to the groove bottom of the first notch and is located between the two ends of the limiting groove.

[0017] Preferably, the base is provided with a perforation for accommodating the jacking member and the centralizer workpiece to pass through.

[0018] Preferably, it further includes a workpiece carrier, and the workpiece carrier is provided with a through hole for accommodating the jacking member to pass through.

[0019] The second object of the present invention is to provide a cutting method for a femoral stem prosthesis centralizer, including the following steps:

[0020] S1: The jacking member jacks up the centralizer workpiece until the jacking member and the clamping member clamp the centralizer workpiece;

[0021] S2: The tool holder driving mechanism drives the tool holder to rotate around the rotating shaft, and the cutting tool cuts the centralizer workpiece along the arc direction from the outer edge to the center, and then the cutting tool resets to the side of the centralizer workpiece;

[0022] S3: The rotation driving mechanism drives the jacking member and the centralizer workpiece to rotate a predetermined angle; the tool holder driving mechanism drives the tool holder to rotate around the rotating shaft, and the cutting tool cuts the centralizer workpiece along the arc direction from the outer edge to the center, and then the cutting tool resets to the side of the centralizer workpiece.

[0023] The advantages and beneficial effects of the present invention are as follows:

[0024] The pressing-down component of the equal-dividing bevel-cutting mechanism of the femoral stem prosthesis centering device and the lifting and rotating mechanism clamp the centering device workpiece and drive the workpiece to rotate a predetermined angle. The cutting tool of the bevel-cutting mechanism cuts the centering device workpiece along the arc direction from the outer edge to the center, and circumferential equal-dividing bevel cutting of the centering device workpiece can be realized.

[0025] The cutting method steps of the femoral stem prosthesis centering device are simple and the degree of automation is high. Description of the Drawings

[0026] Figure 1 is a schematic three-dimensional structure diagram of the equal-dividing bevel-cutting mechanism of the femoral stem prosthesis centering device in the embodiment;

[0027] Figure 2 is Figure 1 a partial enlarged view of A in

[0028] Figure 3 is Figure 1 a partial enlarged view of B in

[0029] Figure 4 is another schematic three-dimensional structure diagram of the equal-dividing bevel-cutting mechanism of the femoral stem prosthesis centering device in the embodiment;

[0030] Figure 5 is Figure 4 a partial enlarged view of C in

[0031] Figure 6 is a schematic connection structure diagram of the tool holder and the translation mechanism;

[0032] In the figure: 1. Pressing-down component; 11. Clamping piece; 12. Pressing-down seat;

[0033] 2. Lifting and rotating mechanism; 21. Lifting piece; 22. Lifting drive mechanism; 23. Rotating drive mechanism; 24. Lifting seat;

[0034] 3. Bevel-cutting mechanism; 31. Tool holder; 311. Limit groove; 32. Cutting tool; 33. Rotating shaft; 34. Base; 341. Perforation; 35. Tool holder drive mechanism; 351. First turntable; 352. First turntable drive mechanism; 353. Eccentric shaft; 354. Long hole; 355. Limiting piece;

[0035] 4. Translation mechanism; 5. Second turntable; 51. Through hole;

[0036] a. Centering device workpiece. Detailed Embodiments

[0037] The following combines embodiments to further describe the specific embodiments of the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0038] In the description of the present application, it should be noted that unless otherwise specified, the meaning of "a plurality of" is more than two; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0039] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Embodiment

[0041] As Figures 1-3 shown, the equal division bevel cutting mechanism of the femoral stem prosthesis centering device in the embodiment includes a pressing-down component 1, a lifting and rotating mechanism 2, and a bevel cutting mechanism 3; the pressing-down component 1 includes a clamping member 11; the lifting and rotating mechanism 2, the lifting and rotating mechanism 2 includes a lifting member 21, a lifting driving mechanism 22 for driving the lifting member 21 to move towards or away from the clamping member 11, and a rotating driving mechanism 23 for driving the lifting member 21 and the centering device workpiece a to rotate; the bevel cutting mechanism 3 includes a tool holder 31 located on the side of the lifting member 21, a cutting tool 32 fixed to the end of the tool holder 31, a base 34 rotatably connected to the tool holder 31 through a rotating shaft 33, and a tool holder driving mechanism 35 for driving the tool holder 31 to rotate around the rotating shaft 33; the clamping member 11 and the lifting member 21 have opposite centering device workpiece a clamping surfaces.

[0042] Optionally, the clamping member 11 in the pressing-down component 1 is fixedly arranged at a certain height above the lifting member 21. The lifting member 21 lifts the centering device workpiece a until the centering device workpiece a is clamped between the lifting member 21 and the clamping member 11.

[0043] The function of the rotation drive mechanism 23 is not only to drive the lifting member 21, but also to drive the centering device workpiece a. When the lifting member rotates, the positions of the lifting member 21 and the centering device workpiece a are relatively fixed, such as by bonding or suction cup adsorption, or the positions of the centering device workpiece a, the lifting member 21, and the clamping member 11 are relatively fixed, such as by a clamping structure. When the positions of the two components of the lifting member 21 and the centering device workpiece a are relatively fixed, the rotation drive mechanism 23 can achieve the rotation of the lifting member 21 and the centering device workpiece a in the following way: when the rotation drive mechanism 23 drives the lifting member 21, the centering device workpiece a is separated from the clamping member 11, and when cutting, it is switched to a structure in which the lifting member 21 and the clamping member 11 clamp the centering device workpiece a; when the positions of the three components of the centering device workpiece a, the lifting member 21, and the clamping member 11 are relatively fixed, the rotation drive mechanism 23 must drive the clamping structure to move, that is, the clamping member 11 in the pressing component 1 rotates concentrically with the lifting member 21.

[0044] The length of the cutting tool 32 and the position of the rotating shaft 33 are specifically determined according to the size of the centering device workpiece a. When the tool holder 31 rotates around the rotating shaft 33, the cutting tool located at the end of the tool holder 31 also rotates accordingly. The movement trajectory of the cutting tool 32 intersects with the central outer peripheral area of the centering device workpiece a, forming an arc-shaped cutting surface on the central outer periphery of the centering device workpiece a. The tool holder drive mechanism 35 drives the tool holder 31 to rotate around the rotating shaft 33. The tool holder drive mechanism 35 can be selected as a linear telescopic drive member such as a cylinder or a linear hydraulic cylinder, and the drive end of the telescopic mechanism is pin-connected to the tool holder 31.

[0045] It can be understood that the arcs corresponding to the cutting surfaces in the circumferential direction of the centering device workpiece a are of equal length. Therefore, the lifting member 21 and the clamping member 11 clamp the centering device workpiece a at the central position.

[0046] As a component implanted into the bone marrow cavity, the material of the femoral stem prosthesis centering device can be selected as ultra-high molecular weight polyethylene, polylactic acid, etc. Further, the area of the clamping surface is small. In order to ensure the stable position of the workpiece during lifting and clamping of the centering device workpiece a, the clamping surfaces of the clamping member 11 and the lifting member 21 are provided with structures to increase friction, such as rubber cushions, rough clamping surfaces, etc.; furthermore, the above structures to increase friction are preferably those that do not damage the surface of the centering device workpiece a and do not generate fine debris.

[0047] The centering device workpiece a above the lifting member 21 can be fed manually by hand or by a feeding mechanism. Compared with manual feeding, the feeding mechanism has a high degree of automation and is coordinated with the operation of the bevel cutting mechanism 3, which is beneficial to improving the production efficiency of the centering device.

[0048] The lifting drive mechanism 22 can be selected as any known linear drive mechanism, such as a lead screw slide or a linear hydraulic cylinder; the rotation drive mechanism 23 can be selected as a rotary cylinder, a rotary hydraulic cylinder, etc.

[0049] Preferably, the axial direction of the rotating shaft 33 is consistent with the jacking direction of the jacking member 21.

[0050] As Figures 5-6 shown, in some preferred embodiments, the base 34 is connected to the translation mechanism 4; the translation mechanism 4 drives the rotating shaft 33 to move towards or away from the rotation axis of the jacking member 21.

[0051] The jacking member 21 coincides with the center of the centralizer workpiece a. By the translation mechanism 4, the distance between the rotating shaft 33 and the central axis or the rotation axis of the centralizer workpiece a is reduced. Compared with the case where the distance between the rotating shaft 33 and the central axis of the centralizer workpiece is a fixed value, the force arm of the cutting tool 32 applying a cutting force to the centralizer workpiece a is smaller. Based on the lever principle and the same driving force for rotating the tool holder 31, the cutting force of the cutting tool 32 on the centralizer workpiece a increases. With a certain cutting force area, the pressure increases, which is beneficial to reducing the probability of slipping between the cutting tool 32 and the centralizer workpiece a and improving the cutting accuracy. Further, the translation mechanism 4 drives the base 34 to move along a first direction towards or away from the jacking member 21 within the cross-section of the rotating shaft 33.

[0052] As Figure 2 、 5 shown, in some preferred embodiments, the tool holder driving mechanism 35 includes a first turntable 351, a first turntable driving mechanism 352 for driving the first turntable 351 to rotate, and an eccentric shaft 353 provided on the first turntable 351; the tool holder 31 is provided with a guide rail, and the extending direction of the guide rail is perpendicular to the axial direction of the rotating shaft 33. The eccentric shaft 353 is rotatably arranged in the guide rail and moves along the guide rail.

[0053] Figures 5-6 In, the guide rail is a long hole 354 provided on the tool holder 31, and the extending direction of the guide rail is the long side direction of the long hole 354. A limiting member 355 is provided at the free end of the eccentric shaft 353 to ensure that the middle section of the eccentric shaft 353 passes through the long hole 354.

[0054] When the tool holder 31 undergoes translation, the tool holder driving mechanism 35 can optionally translate therewith; the above tool holder driving mechanism 35 is adapted to the translation mechanism 4 that drives the base 34 to move along the first direction. When the translation mechanism 4 drives the tool holder 31 to translate, the tool holder driving mechanism 35 does not move with the tool holder 31, that is, the tool holder 31 is fixedly connected to the machine frame, improving the stability of the tool holder driving mechanism 35.

[0055] When the linear telescopic driving member drives the tool holder 31, before and after the translation mechanism 4 drives the tool holder 31, the extended length of the piston rod of the linear telescopic driving member will change; and before and after the translation mechanism 4 drives the tool holder 31, the relative position of the eccentric shaft 353 in the long hole 354 changes, and the position of the eccentric shaft 353 relative to the lifting member 21 remains unchanged; that is, there is no need for the first turntable driving mechanism 352 to act with the translation mechanism 4, and the first turntable driving mechanism 352 is controlled independently, which is conducive to the control of the production rhythm of automated production.

[0056] As Figure 2 shown, in some preferred embodiments, the pressing component 1 includes a pressing seat 12, and the clamping member 11 is rotatably connected to the pressing seat 12, and the rotation axes of the clamping member 11 and the lifting member 21 coincide.

[0057] Compared with the above-mentioned adsorption of the middle placer workpiece a by the lifting member 21, the clamping member 11, the middle placer workpiece a, and the lifting member 21 remain relatively fixed in position before all the slitting of the same workpiece is completed, and rotation and slitting are carried out alternately, which is conducive to improving the slitting efficiency. Optionally, the clamping member 11 is rotatably connected to the pressing seat 12 through a bearing. Further, the clamping member 11 is connected to a clamping driving mechanism that drives it to move towards or away from the lifting member 21. Since the diameter of the contact surface between the lifting member 21 and the middle placer workpiece a is small, the clamping driving mechanism drives the clamping member 11 close to the lifting member 21, which can reduce the stroke of the lifting driving mechanism 22 driving the lifting member 21 to move towards the clamping member 11, is conducive to improving the position stability of the middle placer workpiece a during the lifting process, and reduces the probability of the middle placer workpiece a being deflected.

[0058] As Figure 3 shown, in some preferred embodiments, the lifting member 21 is rotatably connected to the lifting seat 24, the rotation driving mechanism 23 is fixedly connected to the lifting seat 24, and the lifting driving mechanism 22 drives the lifting seat 24 to move reciprocally. After the lifting driving mechanism 22 drives the lifting member 21, the lifting seat 24, and the rotation driving mechanism 23 to move towards or away from the clamping member 11 at the same time, the rotation driving mechanism 23 drives the lifting member 21 to rotate relative to the lifting seat 24. Specifically, the lifting member 21 is rotatably connected to the lifting seat 24 through a bearing.

[0059] It can be understood that, in some embodiments, the extending direction of the cutting edge of the cutting tool 32 is the same as the axial direction of the rotating shaft 33, or as Figure 2 , 6 shown, in some preferred embodiments, the extending direction of the cutting edge of the cutting tool 32 forms an acute angle with the lifting direction of the lifting member 21. The lifting direction of the lifting member 21 is the same as the thickness direction of the outer edge disk surface of the middle placer workpiece a, and the inclined setting of the cutting tool 32 enables a cutting surface that forms an angle with the disk surface to be realized.

[0060] When the extending direction of the cutting edge of the cutter 32 is consistent with the axial direction of the rotating shaft 33, the cutting action area between the cutter 32 and the outer edge disk surface of the centering device workpiece a is the smallest, the direction of the cutting force is parallel to the disk surface, and it is not easy to cause the deformation of the outer periphery of the centering device workpiece a to split; when there is an acute angle between the cutting edge of the cutter 32 and the lifting direction of the lifting member 21, the cutting action area increases, and there is a component force of the cutting force deviating from the disk surface, which will exacerbate the deformation of the outer edge disk surface of the centering device workpiece a. Moreover, the more times the same workpiece is cut, the smaller the width of the connecting part between the outer edge of the centering device workpiece a to be cut and the center of the centering device workpiece a during the later cutting, and the connecting part is more likely to bend and deform, ultimately resulting in the inability to smoothly perform the later cutting of the same workpiece. The bending deformation of the split connecting part is in the direction away from the cutter. For example, when the fixed end of the cutter is below the outer edge disk surface of the centering device workpiece a, the split is likely to slide towards the free end of the cutter and bend upwards.

[0061] As Figures 5-6 shown, in some preferred embodiments, the tool holder 31 is provided with a limiting groove 311 for accommodating the outer edge of the centering device workpiece a, and the first notch of the limiting groove 311 is arranged opposite to the groove bottom; the cutter 32 is blocked at the side opposite to the groove bottom of the first notch and is located between the two ends of the limiting groove 311.

[0062] During the cutting operation, the outer edge or the split to be cut of the centering device workpiece a first enters the limiting groove 311, and then the split to be cut abuts against the cutting edge of the cutter 32. The deformation amount of the split to be cut is limited by the groove surface of the limiting groove 311 to ensure the smooth completion of the oblique cutting. The limiting groove helps to control the cutting surface error caused by the split deformation within a small range.

[0063] Furthermore, the groove width of the limiting groove 311 is slightly larger than the thickness of the outer edge disk surface of the centering device workpiece a. The groove width of the limiting groove 311 determines the error of the splitting angle of the centering device workpiece a. Further, the rotation direction of the lifting member 21 is from the groove bottom to the first notch direction, that is, the rotation direction of the outer edge of the centering device workpiece a located in the limiting groove 311 is from the groove bottom to the first notch direction. The width of the connecting part between the split to be cut and the center of the centering device workpiece a is always greater than that of the split after cutting. Taking the 16 - equal - division of the outer edge of the centering device workpiece a as an example, the included angle of the split after cutting is about 22.5°, and the minimum included angle of the split to be cut is about 45°. Cutting will generate new stresses on the split, and the stresses will further cause the split to deform. Due to being limited by the connecting part, the deformation of the split to be cut is smaller than that of the split after cutting. The above rotation direction of the lifting member 21 ensures that the split to be cut is always located within the limiting groove 311. On the contrary, when the rotation direction of the lifting member 21 is from the first notch to the groove bottom direction, the deformation of the split to be cut is too large, and there is a problem that the split to be cut interferes with the notch of the limiting groove during the later cutting of the same centering device workpiece a, and further causes the split to be cut unable to enter the limiting groove.

[0064] Further, the limiting groove 311 is combined with the translation mechanism 4, and the function of the translation mechanism 4 is also to drive the limiting groove 311 to move to the limiting station. The groove surfaces of the limiting groove 311 at the limiting station are respectively arranged on the opposite sides of the outer edge of the centering device workpiece a.

[0065] Optionally, the base 34 is arranged on one side of the lifting member 21. As Figure 6 shown, in some preferred embodiments, the base 34 is provided with a through hole 341 for the lifting member 21 and the centering device workpiece a to pass through, that is, the base 34 is in a frame shape. Since the translation mechanism 4 of the base 34 and the tool holder driving mechanism 35 are arranged offset from each other on the outer periphery of the base 34, compared with the base 34 arranged on one side of the lifting member 21, the frame-shaped base 34 has higher strength and structural stability, and the deformation amount of the base 34 under the action of the two driving mechanisms is controlled to be smaller.

[0066] As Figure 2 、 4 shown, in some preferred embodiments, the femoral stem prosthesis centering device equal division bevel cutting mechanism 3 further includes a workpiece carrier table, and the workpiece carrier table is provided with a through hole 51 for the lifting member 21 to pass through. Further, the through hole 51 is also a positioning hole for the centering device workpiece a.

[0067] Optionally, the workpiece carrier table Figure 2 、 4 the second turntable 5 shown in, the second turntable 5 is connected to a rotation driving mechanism such as a cam divider. Further, the second turntable 5 is simultaneously provided with a plurality of positioning holes to adapt to different processing and detection steps for the centering device workpiece a. As an alternative, the workpiece carrier table is connected to a telescopic driving member, and the workpiece carrier table is used in cooperation with a feeding mechanism for the centering device workpiece a one by one.

[0068] The cutting method of the femoral stem prosthesis centering device includes the following steps:

[0069] S1: The lifting member 21 lifts the centering device workpiece a until the lifting member 21 and the clamping member 11 clamp the centering device workpiece a;

[0070] S2: The tool holder driving mechanism 35 drives the tool holder 31 to rotate around the rotating shaft 33, and the cutting tool 32 cuts the centering device workpiece a along the arc direction from the outer edge to the center, and then the cutting tool 32 returns to the side of the centering device workpiece a;

[0071] S3: The rotation driving mechanism 23 drives the lifting member 21 and the centering device workpiece a to rotate a predetermined angle; the tool holder driving mechanism 35 drives the tool holder 31 to rotate around the rotating shaft 33, and the cutting tool 32 cuts the centering device workpiece a along the arc direction from the outer edge to the center, and then the cutting tool 32 returns to the side of the centering device workpiece a.

[0072] Specifically, the cutting method of the femoral stem prosthesis centering device includes the following steps:

[0073] S1: The lifting member 21 extends into the through hole 51 of the second turntable 5 and continuously ascends in the plumb direction. The lifting member 21 lifts the workpiece of the centering device to disengage from the second turntable 5, passes through the perforation 341 of the base 34 until the top surface of the workpiece a of the centering device contacts and presses against the clamping member 11. At this time, the outer edge disk surface of the workpiece a of the centering device is horizontally arranged.

[0074] S2: The translation mechanism 4 drives the tool holder 31 to translate until the cutting edge of the cutting tool 32 approaches the outer edge disk surface and the outer edge disk surface is located in the limit groove 311. The first turntable driving mechanism 352 drives the first turntable 351 to rotate. The eccentric shaft 353 drives the tool holder 31 to rotate around the rotating shaft 33. The cutting tool 32 cuts the workpiece a of the centering device along the arc direction from the outer edge to the center. After the first turntable driving mechanism 352 drives the first turntable 351 to rotate one week, the cutting tool 32 resets to the side of the workpiece a of the centering device.

[0075] S3: The rotation driving mechanism 23 drives the lifting member 21, the workpiece a of the centering device and the clamping member 11 to rotate a predetermined angle along the bottom to the opening direction of the limit groove 311. The first turntable driving mechanism 352 drives the first turntable 351 to rotate. The eccentric shaft 353 drives the tool holder 31 to rotate around the rotating shaft 33. The cutting tool 32 cuts the workpiece a of the centering device along the arc direction from the outer edge to the center. After the first turntable driving mechanism 352 drives the first turntable 351 to rotate one week, the cutting tool 32 resets to the side of the workpiece a of the centering device.

[0076] S4: Repeat S3 until the workpiece a of the same centering device is cut a predetermined number of times.

[0077] S5: The lifting member 21 drives the cut workpiece a of the centering device to descend. The workpiece a of the centering device falls into the positioning hole of the second turntable 5. The second turntable 5 rotates to drive the cut workpiece a of the centering device to discharge.

[0078] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A femoral stem prosthesis centering equal division bevel cutting mechanism, characterized in that, Comprising: A downward pressing assembly, including a clamping member; A lifting and rotating mechanism, including a lifting member, a lifting driving mechanism for driving the lifting member to move towards or away from the clamping member, and a rotating driving mechanism for driving the lifting member to rotate; An inclined cutting mechanism, including a tool holder located on the side of the lifting member, a cutting tool fixed to the end of the tool holder, a base rotatably connected to the tool holder through a rotating shaft, and a tool holder driving mechanism for driving the tool holder to rotate around the rotating shaft; The clamping member and the lifting member have opposite centralizer workpiece clamping surfaces; The tool holder driving mechanism includes a first turntable, a first turntable driving mechanism for driving the first turntable to rotate, and an eccentric shaft provided on the first turntable; the tool holder is provided with a guide rail, the extending direction of the guide rail is perpendicular to the axial direction of the rotating shaft, and the eccentric shaft is rotatably arranged in the guide rail and moves along the guide rail; The tool holder is provided with a limiting groove for accommodating the outer edge of the centralizer workpiece, and the first notch of the limiting groove is arranged opposite to the groove bottom; the cutting tool is blocked on the side opposite to the groove bottom of the first notch and is located between the two ends of the limiting groove.

2. The equal division bevel cutting mechanism of the femoral stem prosthesis centering device according to claim 1, characterized in that The base is connected to a translation mechanism; the translation mechanism drives the rotating shaft to move towards or away from the rotating shaft of the lifting member.

3. The equal division bevel cutting mechanism of the femoral stem prosthesis centering device according to claim 1, characterized in that, The downward pressing assembly includes a downward pressing base, the clamping member is rotatably connected to the downward pressing base, and the rotating shafts of the clamping member and the lifting member coincide.

4. The equal division bevel cutting mechanism of the femoral stem prosthesis centering device according to claim 1, characterized in that The lifting member is rotatably connected to a lifting base, the rotating driving mechanism is fixedly connected to the lifting base, and the lifting driving mechanism drives the lifting base to move towards or away from the clamping member.

5. The equal division bevel cutting mechanism of the femoral stem prosthesis centering device according to claim 1, characterized in that, The extending direction of the cutting edge of the cutting tool forms an acute angle with the lifting direction of the lifting member.

6. The equal division and bevel cutting mechanism of the femoral stem prosthesis centering device according to claim 2, characterized in that, The base is provided with a through hole for accommodating the lifting member and the centralizer workpiece to pass through.

7. The equal division bevel cutting mechanism of the femoral stem prosthesis centering device according to claim 1, characterized in that, It further includes a workpiece carrier table, and the workpiece carrier table is provided with a through hole for accommodating the lifting member to pass through.

8. A method for cutting a femoral stem prosthesis centering device, characterized in that, Based on the femoral stem prosthesis centralizer equal division inclined cutting mechanism according to any one of claims 1 to 7, the following steps are included: S1: The lifting member lifts the centralizer workpiece until the lifting member and the clamping member clamp the centralizer workpiece; S2: The tool holder driving mechanism drives the tool holder to rotate around the rotating shaft, and the cutting tool cuts the centralizer workpiece along the arc direction from the outer edge to the center, and then the cutting tool resets to the side of the centralizer workpiece; S3: The rotating driving mechanism drives the lifting member and the centralizer workpiece to rotate a predetermined angle; the tool holder driving mechanism drives the tool holder to rotate around the rotating shaft, and the cutting tool cuts the centralizer workpiece along the arc direction from the outer edge to the center, and then the cutting tool resets to the side of the centralizer workpiece.

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