Device for machining artificial joint through magnetic jet

Abstract

The invention belongs to the technical field of artificial joint machining, and particularly relates to a device for machining an artificial joint through magnetic jet. The device is composed of a material cylinder, a stirring device, a hydraulic pump, a spray gun structure, a workbench, an electric lifting platform, a clamp, a polishing device and the like. Wherein the stirring device can stir magnetorheological fluid in the material cylinder, the hydraulic pump is matched with the pipeline to convey the magnetorheological fluid, the spray gun structure sprays the magnetorheological fluid to the surface of the artificial joint, and a polishing wheel of the polishing device is composed of a soft magnetic shell and an electromagnetic coil and can generate a specific magnetic field. The device is compact in structure and low in cost, through the unique design of the polishing wheel and the spray gun, the removal function stability and the polishing energy are effectively improved, the machining distance is enlarged, the machining precision of the artificial joint is higher, the effect is more uniform, and the device is particularly suitable for machining of the complex special-shaped curved surface titanium alloy artificial joint.

Description

Technical Field

[0001] The present invention relates to the technical field of artificial joint processing, and is particularly suitable for processing titanium alloy artificial joints with complex anisotropic curved surfaces, and more specifically relates to a device for processing artificial joints by magnetic jet. Background Art

[0002] Titanium alloy artificial joints are mostly made by casting. The molten titanium alloy liquid is injected into the shell mold, allowing the molten liquid to fill the shell mold. After it cools down, the shell mold is broken to obtain the titanium alloy artificial joint. The titanium alloy artificial joint obtained by casting cannot be used directly and needs to undergo subsequent processing such as grinding and polishing.

[0003] Magnetic jet machining technology is a combination of abrasive water jet technology and magnetorheological technology. It uses a designed magnetic field to collimate the magnetorheological fluid jet beam, generating a well-focused jet beam for deterministic precision machining. Titanium alloy artificial joint prostheses after forming and sintering cannot be directly applied to the human body. They also need to undergo a series of subsequent processes such as grinding and polishing to finally obtain an artificial joint with a smooth, uniform, high-quality surface that fits well with human bones. The degree of finish of the artificial joint surface has a crucial impact on its function and service life. Titanium alloy is widely used in artificial joint design due to its high strength and low modulus characteristics. However, there are defects such as poor machinability and low thermal conductivity in the surface finishing of titanium alloy. In addition, the surface of artificial joints is mostly complex curved surfaces. It is difficult to effectively process some surfaces using traditional polishing methods. The polishing efficiency is low and the polishing quality is difficult to stabilize. Summary of the Invention

[0004] In view of the above-mentioned shortcomings, the present invention provides a device for magnetorheological processing of artificial joints and designs a special polishing wheel suitable for this method. The processing method provided by the present invention has higher processing efficiency and higher processing precision.

[0005] The present invention is realized by the following technical scheme: a device for magnetorheological processing of artificial joints, comprising: 1. a material cylinder; 2. a stirring device; 2-1. a motor; 2-2. a connecting shaft; 2-3. a stirring fan; 3. a valve; 4. a first pipe; 5. a hydraulic pump; 6. a second pipe; 7. a spray gun structure; 7-1. a base; 7-2. a bracket; 7-3. a rotating shaft; 7-4. a spray gun; 8. a first workbench; 9. an electric lifting platform; 9-1. a base; 9-2. a guide rail; 9-3. a slider; 9-4. a rotating shaft; Shaft, 9-5, roller, 9-6, lifting plate 1, 9-7, upper cover, 9-8, displacement plate 2, 9-9, connecting shaft 2, 9-10, stepper motor, 10, fixture, 10-1, guide rail 2, 10-2, slider 2, 10-3, connecting plate, 10-4, clamping claw, 10-5, workpiece table, 10-6, ball guide block, 10-7 screw, 10-8, rocker, 10-9, positioning pin, 10-10, support column, 10-11, base 2, 11, artificial joint, 12 , polishing device, 12-1, motor two, 12-2, rotating shaft two, 12-3, coupling, 12-4, positioning shoulder, 12-5, polishing wheel, 12-6, bearing, 12-7, bearing end cover, characterized in that: the material cylinder is installed on workbench two, the stirring device is installed on the material cylinder, the stirring device is composed of a motor, a connecting shaft and a stirring fan, the coupling is installed on the motor, the connecting shaft is installed on the coupling, the stirring fan is installed on the connecting shaft, the hydraulic pump is installed on workbench two, one end of the pipe is installed on the material cylinder, and the other end is installed on the hydraulic pump, the spray gun mechanism is placed on the ground, the spray gun mechanism is composed of a spray gun, a rotating shaft, a bracket and a base, one end of the pipe is connected to the hydraulic pump, and the other end is connected to the spray gun mechanism, the polishing device is installed on workbench two, the polishing device is composed of motor two, rotating shaft two, coupling, positioning shoulder, polishing wheel, bearing, and bearing end cover, the electric lifting platform is installed on workbench two, the fixture is installed on the electric lifting platform, and the artificial joint is installed on the fixture.

[0006] Further, as a preference, the fixture is composed of guide rail 2, slider 2, connecting plate, clamping claw, workpiece table, ball guide block, screw, rocker, positioning pin, support column, and base 2, wherein guide rail 2 is connected to the base by bolts, slider 2 is placed on guide rail 2, slider 2 is connected to the connecting plate by bolts, the clamping claw is connected to the connecting plate by bolts, the ball guide block is connected to the connecting plate by bolts, the ball guide block is connected to the screw, the screw is connected to the positioning pin, the positioning pin is connected to the base by bolts, and the rocker is connected to the screw.

[0007] Further, as a preference, the electric lifting platform structure is composed of a base, a guide rail, a slider, a rotating shaft, a roller, a lifting plate 1, an upper cover, a displacement plate 2, a connecting shaft 2, and a stepper motor. The guide rail is connected to the base by bolts, the slider is connected to the guide rail, the displacement plate 2 is connected to the slider by bolts, the displacement plate 1 is connected to the roller through the rotating shaft, the displacement plate 1 is connected to the upper cover by bolts, and the stepper motor is connected to the displacement plate 2 by bolts.

[0008] Furthermore, preferably, the polishing wheel is composed of a soft magnetic shell and an electromagnetic coil, and the electromagnetic coil is installed inside the soft magnetic shell, thereby generating a magnetic field distribution in the direction of the outer edge.

[0009] Furthermore, as a preference, the spray gun structure is composed of a base, a bracket, a rotating shaft, and a spray gun, wherein the base is connected to the bracket via a fixing nail, and the spray gun is mounted on the bracket via the rotating shaft.

[0010] Further, as a preference, the polishing device is composed of motor 2, rotating shaft 2, a coupling, a positioning shoulder, a polishing wheel, a bearing, and a bearing end cover. Motor 2 is connected to rotating shaft 2 through a coupling. The polishing wheel is connected to the rotating shaft through a key to achieve circumferential positioning and achieves axial positioning through the positioning shoulder. The positioning shoulder is connected to rotating shaft 2 through a fixing pin. The bearing is installed on the bearing end cover, and the bearing end cover is installed on workbench 1 through a bolt connection.

[0011] The benefits of this invention are:

[0012] The device has a simple and compact structure and low production cost. It adopts the method of rotating the polishing wheel constraint component to prevent abrasive particles from depositing on the artificial joint processing surface. It adopts an axial coil to generate a magnetic field distribution in the direction of the outer edge of the polishing wheel. It adopts a spray gun structure to spray out magnetorheological fluid, forming a magnetic field-stabilized magnetorheological fluid jet beam near the artificial joint processing surface, thereby improving the stability of the removal function and the polishing energy, and expanding the processing distance of the polishing tool. Therefore, this magnetic jet device is more suitable for processing the artificial joint surface, making the artificial joint processing precision higher and the effect more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the overall structure of a device for magnetic jet machining artificial joints

[0014] Figure 2 Schematic diagram of the fixture

[0015] Figure 3 Schematic diagram of the agitator structure

[0016] Figure 4 Schematic diagram of the lifting platform structure

[0017] Figure 5 Schematic diagram of the spray gun structure

[0018] Figure 6 Schematic diagram of polishing structure

[0019] Figure 7 Schematic diagram of polishing wheel

[0020] In the figure: 1 - material cylinder, 2 - stirring device, 201 - motor, 202 - connecting shaft, 203 - stirring fan, 3 - valve, 4 - pipeline 1, 5 - hydraulic pump, 6 - pipeline 2, 7 - spray gun structure, 701 - base, 702 - bracket, 703 - rotating shaft, 704 - spray gun, 8 - workbench, 9 - electric lifting platform, 901 - base, 902 - guide rail, 903 - slider, 904 - rotating shaft, 905 - roller, 906 - lifting plate 1, 907 - upper cover, 908 - displacement plate 2, 909 - connecting shaft 2, 910 - stepper Motor, 10—fixture, 1001—guide rail 2, 1002—slider 2, 1003—connecting plate, 1004—clamping claw, 1005—workpiece table, 1006—ball guide block, 1007—screw, 1008—rocker, 1009—locating pin, 1010—support column, 1011—base 2, 11—artificial joint, 12—polishing device, 1201—motor 2, 1202—rotating axis 2, 1203—coupling, 1204—locating shoulder, 1205—polishing wheel, 1206—bearing, 1207—bearing end cover DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concept of the present invention. Other embodiments obtained by those of ordinary skill in the art without making creative work are all within the scope of protection of the present invention.

[0022] Please read the attached Figure 1 —Attachment Figure 7The present invention provides a technical solution: a device for magnetic jet processing of artificial joints, which is composed of a material cylinder 1, a stirring device 2, a valve 3, a pipe 4, a hydraulic pump 5, a pipe 6, a spray gun structure 7, a workbench 8, an electric lifting platform 9, a clamp 10, an artificial joint 11, a polishing device 12 and a workbench 13, and is characterized in that: the material cylinder 1 is installed on the workbench 8, the stirring device 2 is installed on the material cylinder 1, the stirring device is composed of a motor 201, a connecting shaft 201 and a stirring fan 203, the hydraulic pump 5 is installed on the workbench 13, one end of the pipe 3 is installed on the material cylinder, and the other end is installed on the hydraulic pump 5, the spray gun mechanism 6 is placed on the ground, and the spray gun mechanism is composed of a spray gun 704, a rotating shaft 703, a bracket 702 and a base 701 One end of the pipe 2 6 is connected to the hydraulic pump 5, and the other end is connected to the spray gun mechanism 7. The polishing device is installed on the workbench 1 8. The polishing device is composed of a motor 2 1201, a rotating shaft 2 1202, a coupling 1203, a positioning shoulder 1204, a polishing wheel 1205, a bearing 1206, and a bearing end cover 1207. The electric lifting platform 9 is installed on the workbench 1 8. The fixture 10 is installed on the electric lifting platform. The fixture is composed of a guide rail 2 1001, a slider 2 1002, a connecting plate 1003, a clamping claw 1004, a workpiece table 1005, a ball guide block 1006, a screw 1007, a rocker 1008, a positioning pin 1009, a support column 1010, and a base 2 1011. The artificial joint 11 is installed on the fixture 10.

[0023] Before the device is put into operation, the artificial joint 11 is mounted on the fixture 10 according to the size of the artificial joint 11, the electric lifting platform 9 is used to adjust the distance between the artificial joint 11 and the polishing wheel 1205, and the angle of the spray gun 704 is adjusted so that the nozzle is aligned with the processing surface of the artificial joint 11.

[0024] When the device is working, the valve 3 is opened and the power is turned on to start the hydraulic pump 5. The magnetorheological fluid flows from the cylinder 1 through the pipe 1 2 into the hydraulic pump 5, and then from the hydraulic pump 5 through the pipe 2 6 into the spray gun structure 7. The spray gun 704 sprays the magnetorheological fluid from the nozzle to the surface of the artificial joint. The motor 1201 is turned on to rotate the polishing wheel 1205. A contoured flow channel is formed between the polishing wheel 1205 and the artificial joint 11. The polishing wheel 1205 is made of soft magnetic material and has an electromagnetic coil inside, thereby generating a magnetic field distribution in the direction of the outer edge. The magnetorheological fluid is sprayed into the contoured flow channel through the nozzle, and a magnetorheological fluid jet beam is formed near the contoured flow channel. The magnetorheological fluid jet beam passes through the surface of the artificial joint 11 to complete the processing of the artificial joint 11.

[0025] For those skilled in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. A device for magnetic jet machining of artificial joints, characterized in that: The invention comprises a material cylinder (1), a stirring device (2), a valve (2), a pipe (4), a hydraulic pump (5), a pipe (6), a spray gun structure (7), a workbench (8), an electric lifting platform (9), a fixture (10), an artificial joint (11), a polishing device (12), and a workbench (13); the material cylinder (1) is installed on the workbench (13), the stirring device (2) is installed on the material cylinder (1), the stirring device is composed of a motor (201), a connecting shaft (202) and a stirring fan (203), the connecting shaft (202) is installed on the motor (201), and the stirring fan (203) is installed on the connecting shaft (202); the hydraulic pump (5) is installed on the workbench (13), and one end of the pipe (4) is installed on the material cylinder (1). ) on the hydraulic pump (5); the other end is installed on the hydraulic pump (5); the spray gun mechanism consists of a spray gun (704), a rotating shaft (703), a bracket (702) and a base (701); the spray gun mechanism is placed on the ground; one end of the pipe (6) is connected to the hydraulic pump (5) and the other end is connected to the spray gun mechanism; the polishing device consists of a motor (1201), a rotating shaft (1202), a coupling (1203), a positioning shoulder (1204), a polishing wheel (1205), a bearing (1206), and a bearing end cover (1207); the polishing device is installed on a workbench (8); the electric lifting platform (9) is installed on the workbench (8), the fixture (10) is installed on the electric lifting platform (9), and the artificial joint (11) is installed on the fixture.

2. The device for magnetic jet machining of artificial joints according to claim 1, characterized in that: The clamp is composed of a second guide rail (1001), a second slider (1002), a connecting plate (1003), a clamping claw (1004), a workpiece table (1005), a ball guide block (1006), a lead screw (1007), a rocker (1008), a positioning pin (1009), a support column (1010), and a second base (1011), wherein the second guide rail is connected to the base by bolts, the second slider is placed on the second guide rail, the second slider is connected to the connecting plate by bolts, the clamping claw is connected to the connecting plate by bolts, the ball guide block is connected to the connecting plate by bolts, the ball guide block is connected to the lead screw, the lead screw is connected to the positioning pin, the positioning pin is connected to the base by bolts, and the rocker is connected to the lead screw.

3. The device for magnetic jet machining of artificial joints according to claim 1, characterized in that: The electric lifting platform structure is composed of a base (901), a guide rail (102), a slider (903), a rotating shaft (904), a roller (905), a lifting plate 1 (906), an upper cover (907), a displacement plate 2 (908), a connecting shaft 2 (909), and a stepping motor (910). The guide rail is connected to the base by bolts, the slider is connected to the guide rail, the displacement plate 2 is connected to the slider by bolts, the displacement plate 1 is connected to the roller by a rotating shaft, the displacement plate 1 is connected to the upper cover by bolts, and the stepping motor is connected to the displacement plate 2 by bolts.

4. The device for magnetic jet machining of artificial joints according to claim 1, characterized in that: The polishing wheel consists of a soft magnetic shell and an electromagnetic coil. The electromagnetic coil is installed inside the soft magnetic shell, thereby generating a magnetic field distribution in the direction of the outer edge.

5. The device for magnetic jet machining of artificial joints according to claim 1, characterized in that: The spray gun structure consists of a base (701), a bracket (702), a rotating shaft (703), and a spray gun (704), wherein the base (701) is connected to the bracket (702) through a fixing nail, and the spray gun (704) is installed on the bracket (702) through the rotating shaft (703).

6. The device for magnetic jet machining of artificial joints according to claim 1, characterized in that: In the polishing device, motor 2 (1201) is connected to rotating shaft 2 (1202) via a coupling (1203), the polishing wheel (1205) is connected to the rotating shaft via a key to achieve circumferential positioning, and is positioned axially via a positioning shoulder (1204), the positioning shoulder (1204) is connected to rotating shaft 2 (1202) via a fixing pin, the bearing (1206) is mounted on the bearing end cover (1207), and the bearing end cover is mounted on the workbench 1 (8) via a bolt connection.

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