A kind of force rheological polishing device and polishing method

Abstract

The present invention provides a force rheological polishing device and a polishing method. A frame is provided with a rotatable polishing trough and a rotatable workpiece clamping portion. The workpiece clamping portion is located in the polishing trough, and has the following beneficial effects: polishing liquid is contained in the polishing trough, and the workpiece is clamped on the workpiece clamping portion. The polishing liquid is driven to rotate by the rotating polishing trough. The workpiece rotates under the drive of the rotating clamping portion, and the force acting on the contact area of ​​the surface to be polished increases sharply, thereby realizing the polishing of the workpiece surface. The force rheological polishing device has a simple structure and can polish the surface to be polished efficiently, with high quality and at low cost.

Description

Technical Field

[0001] The invention relates to the field of polishing, and in particular to a force rheological polishing device and a polishing method. Background Art

[0002] The current polishing methods, especially for complex surfaces, mainly include magnetorheological polishing, abrasive jet polishing, ion beam polishing and airbag polishing. The main principle of magnetorheological polishing is to add polishing powder to the magnetorheological fluid, and achieve the purpose of removing trace materials on the surface of the workpiece through the solidification phenomenon of the rheological fluid formed by the high-intensity magnetic field. However, the research on this technology in China is not deep enough, and the research level needs to be further improved. Abrasive jet polishing is to shoot a high-speed jet mixed with abrasive particles to the surface of the workpiece through a special nozzle, and use the high-speed impact and scouring of the abrasive to achieve the purpose of removing materials. It has many advantages and is often used to polish optical hard and brittle materials such as quartz and ceramics. It has achieved certain application and development in the field of optical component processing. Ion beam polishing mainly uses the principle of ion beam sputtering to achieve the purpose of material removal. Based on the above removal principle, ion beam polishing has the characteristics of high processing accuracy, good material removal certainty, stress-free, non-contact processing, etc., and is particularly suitable for ultra-precision processing of complex optical surfaces. The main principle of air bag polishing is to use a spherical polishing tool that is much smaller than the component being processed. Under computer control, the surface of the workpiece is polished at a certain path, pressure and speed. The hardness of the air bag polishing head is controlled by the pressure of the gas rushing into the polishing head to achieve material removal on the processed surface.

[0003] Due to various reasons such as cost and difficulty, some workpieces with complex curved surfaces, such as watch case frames, are still mostly polished by hand felt polishing. This is not only inefficient but also highly dependent on manual experience, which is not conducive to improving the efficiency and benefits of enterprises. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a mechanorheological polishing device and a polishing method, which can polish complex curved surfaces with high efficiency, high quality and low cost.

[0005] To achieve the above-mentioned purpose, the present invention provides a mechanorheological polishing device, wherein a rotatable polishing trough and a rotatable workpiece clamping portion are provided on the frame, and the workpiece clamping portion is located in the polishing trough.

[0006] Preferably, it also includes a spindle system for driving the polishing trough to rotate, and the spindle system includes a spindle fixed to the polishing trough and a spindle motor that drives the spindle to rotate.

[0007] Preferably, when a workpiece is fixed on the workpiece clamping portion, an angle between the curved surface to be polished of the workpiece and the rotation direction of the polishing trough is between 10° and 60°.

[0008] Preferably, a support member is connected to the frame, and the workpiece clamping portion and a rotation motor for driving the workpiece clamping portion to rotate are arranged on the support member.

[0009] Preferably, an angle adjustment motor is fixedly disposed on the frame, and an output shaft of the angle adjustment motor is connected to the support member.

[0010] Preferably, there are multiple workpiece clamping parts; a driving gear is fixed on the output shaft of the self-rotating motor, and a driven gear is fixed on each of the workpiece clamping parts, the driving gear is meshed with one of the driven gears, and the other two adjacent driven gears are meshed; the workpiece clamping part is rotatably supported on the support member through a bearing

[0011] Preferably, the frame is also provided with a lifting mechanism, which includes a lifting member and a cylinder fixed on the frame, one end of the lifting member is hinged to the frame, and the other end is connected to the support member; the piston rod of the cylinder is connected to the lifting member, and the straight line where the piston rod is located is staggered with the straight line where the lifting member is located.

[0012] Preferably, the inner peripheral wall of the polishing material groove extends outwardly from the groove bottom toward the groove opening.

[0013] The present invention also proposes a polishing method, utilizing the force rheological device described in claim 1, comprising the following steps: S1, adding polishing liquid into the polishing trough, and clamping the workpiece on the workpiece clamping part; S2, driving the polishing trough and the workpiece clamping part to rotate, and the polishing liquid and the surface to be polished of the workpiece move relative to each other.

[0014] Preferably, when executing step S2, the angle between the surface to be polished of the workpiece and the rotation direction of the polishing tank is between 10° and 60°.

[0015] As described above, the present invention relates to a force rheological polishing device and a polishing method, which have the following beneficial effects: polishing liquid is placed in a polishing trough, and a workpiece is clamped on a workpiece clamping portion, the polishing liquid is driven to rotate by the self-rotating polishing trough, and the workpiece rotates driven by the self-rotating clamping portion, and the force acting on the contact area of ​​the polishing surface increases sharply, thereby achieving polishing of the workpiece surface; the force rheological polishing device has a simple structure and can polish the polishing surface efficiently, with high quality, and at low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a force rheological polishing device of the present invention;

[0017] Figure 2 This is a schematic diagram of a force rheological polishing device of the present invention after the frame is removed;

[0018] Figure 3 It is a structural schematic diagram of a lifting mechanism connected with a support member in the present invention;

[0019] Figure 4 It is a schematic diagram of the structure of the support member in the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the polishing tank in the present invention;

[0021] Figure 6 It is a schematic diagram of the relative position of the rotation direction of the polishing material tank and the surface to be polished of the workpiece clamped on the workpiece clamping part in the present invention.

[0022] Reference numerals:

[0023] 100, frame; 200, polishing trough; 210, spindle; 220, spindle motor; 230, reducer; 300, workpiece clamping part; 310, workpiece; 320, support member; 330, rotating motor; 331, bearing; 332, gear; 400, lifting member; 410, cylinder; 411, piston rod; 412, connecting block; 413, lifting seat; 500, air cooler. DETAILED DESCRIPTION

[0024] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0025] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0026] like Figure 1 and Figure 2As shown, an embodiment of the present invention provides a mechanorheological polishing device, including a frame 100 , on which a rotatable polishing trough 200 and a rotatable workpiece clamping portion 300 are provided, and the workpiece clamping portion 300 is located in the polishing trough 200 .

[0027] Based on this, the present invention also proposes a polishing method of a rheological device, comprising the following steps: S1, adding polishing liquid into the polishing trough 200, and clamping the workpiece 310 on the workpiece clamping part 300; S2, driving the polishing trough 200 and the workpiece clamping part 300 to rotate, and the polishing liquid and the surface to be polished of the workpiece 310 move relative to each other.

[0028] During operation, the polishing liquid is placed in the polishing tank 200, and the workpiece 310 is clamped on the workpiece clamping part 300. The polishing liquid is driven to rotate by the self-rotating polishing tank 200, and the workpiece 310 with the polishing surface is driven to rotate by the self-rotating workpiece clamping part 300. When the relative speed between the workpiece 310 and the polishing liquid exceeds a certain value, shear thickening will occur, and the force in the contact area of ​​the surface to be polished will increase sharply. The "flexible fixed abrasive" formed in the contact area performs micro-cutting on the workpiece 310 to achieve polishing of the surface of the workpiece 310. The mechanorheological polishing device only needs to drive the polishing tank 200 and the workpiece clamping part 300 to rotate to work. It has a simple structure and can polish the surface to be polished efficiently, with high quality and low cost. In actual industrial applications, the surface to be polished can be a complex curved surface, such as a watch case.

[0029] like Figure 2 As shown, the polishing trough 200 is connected to a spindle system that can drive the polishing trough 200 to rotate, and the spindle system includes a spindle 210 connected to the polishing trough 200 and a spindle motor 220 that drives the spindle 210 to rotate. The spindle motor 220 drives the spindle 210 to rotate, driving the polishing trough 200 on the spindle 210 to rotate. A reducer 230 is also provided between the spindle motor 220 and the spindle 210, and the spindle motor 220 adjusts the speed through the reducer 230, thereby driving the spindle 210 to rotate. In this embodiment, the spindle 210 is connected to the bottom end of the polishing trough 200 along the central axis d5 of the polishing trough 200, and the spindle motor 220 drives the polishing trough 200 to rotate along the central axis d5 of the polishing trough 200 itself. It should be noted that the output shaft of the spindle motor 220 can rotate clockwise or counterclockwise, so the polishing tank 200 can be driven to rotate in two directions, that is, from a top view, the polishing tank 200 can rotate in both clockwise and counterclockwise directions. The clockwise and counterclockwise rotation directions of the polishing liquid are controlled by the rotation direction of the polishing tank 200, so as to achieve polishing of the front and back surfaces to be polished of the workpiece 310.

[0030] like Figure 2 and Figure 6 As shown, when the workpiece 310 is fixed on the workpiece clamping part 300, the angle between the surface to be polished of the workpiece 310 and the rotation direction F of the polishing tank 200 is between 10° and 60°. This angle range can not only prevent the polishing liquid from directly impacting the surface of the workpiece 310, resulting in loss of kinetic energy and reduced speed, but also prevent the solid dispersed particles of the mechanorheological polishing liquid from reducing the holding force of the abrasive particles, reducing the plowing effect of the abrasive particles, and thus long polishing time, incomplete polishing, etc.

[0031] like Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, a support member 320 is connected to the frame 100, and a workpiece clamping part 300 and a self-rotating motor 330 for driving the workpiece clamping part 300 to rotate are arranged on the support member 320. When the force rheological polishing device is working, the self-rotating motor 330 drives the workpiece clamping part 300 to rotate, thereby driving the workpiece 310 to rotate. In this embodiment, the workpiece clamping part 300 is rotatably arranged on the support member 320, and the central axis d2 of the workpiece clamping part 300 is roughly perpendicular to the length direction of the support member 320. When the force rheological polishing device is in a working state, the length direction of the support member 320 is roughly parallel to the central axis d5 of the polishing material tank 200, and the workpiece clamping part 300 is vertically connected to the support member 320. The workpiece 310 is clamped at the end of the workpiece clamping part 300, and the surface to be polished of the workpiece 310 is roughly perpendicular to the central axis d2 of the workpiece clamping part 300. The self-rotating motor 330 drives the workpiece clamping part 300 to rotate along its own central axis d2, thereby driving the surface to be polished of the workpiece 310 to rotate along the central axis d2 of the workpiece clamping part 300. When the workpiece 310 is fixed to the workpiece clamping part 300, since the surface to be polished of the workpiece 310 is approximately at right angles to the central axis d2 of the workpiece clamping part 300, the support member 320 can be rotated around the central axis d1 of the support member 320 to a certain angle, and the angle between the surface to be polished of the workpiece 310 and the rotation direction F of the polishing tank 200 is adjusted to between 10° and 60°.

[0032] like Figure 2 , Figure 3 and Figure 4As shown, there are multiple workpiece clamping parts 300; a driving gear 332 is fixed on the output shaft of the self-rotating motor 330, and a driven gear 332 is fixed on each workpiece clamping part 300, the driving gear 332 is meshed with one of the driven gears 332, and the other two adjacent driven gears 332 are meshed; the workpiece clamping part 300 is rotatably supported on the support member 320 through a bearing 331. In this embodiment, the workpiece clamping part 300 passes through the support member 320 through the bearing 331, and one end of the workpiece clamping part 300 is provided with a driven gear 332, and the other end is a clamping workpiece end. Several workpiece clamping parts 300 on the support member 320 are arranged in a row along the length direction of the support member 320 in sequence, and two adjacent driven gears 332 are meshed with each other. The self-rotating motor 330 is arranged at the end of the support member 320, and the driving gear 332 on the output shaft of the self-rotating motor 330 is also meshed with the driven gear 332 on the nearest workpiece clamping part 300. When the rotation motor 330 is started, a plurality of workpiece clamping parts 300 located on the same support member 320 rotate simultaneously along the central axis d2 of each workpiece clamping part 300 itself.

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, a lifting mechanism is also provided on the frame 100, and the lifting mechanism includes a lifting member 400 and a cylinder 410 fixed on the frame 100, one end of the lifting member 400 is hinged to the frame 100, and the other end is connected to the support member 320; the piston rod 411 of the cylinder 410 is connected to the lifting member 400, and the straight line where the piston rod 411 is located is staggered with the straight line where the lifting member 400 is located, that is, the central axis d4 of the piston rod 410 and the central axis d3 of the lifting member d3 are staggered.

[0034] like Figure 3 , Figure 4As shown, in this embodiment, the support member 320 has two extreme positions, namely, the position in the working state and the position in the non-working state; in the working state, the length direction of the support member 320 (that is, the direction of the central axis d1 of the support member 320) is parallel to the axis of the polishing groove 200, and the workpiece clamping parts 300 on the support member 320 are all located in the polishing groove 200; in the non-working state, the central axis d1 of the support member 320 is roughly parallel to the bottom surface of the polishing groove 200, and the workpiece clamping parts 300 on the support member 320 are all located outside the polishing groove 200. The cylinder 410 is arranged on the frame 100, and the piston rod 411 on the cylinder 410 extends from the position close to the polishing groove 200 to the direction away from the polishing groove 200, and the free end of the piston rod 411 is connected to the middle position of the lifting member 400. When the cylinder 410 is started, the piston rod 411 extends, driving the support member 320 to move from the position in the working state to the position in the non-working state, until the length direction of the support member 320 is roughly parallel to the bottom surface of the polishing tank 200; when the cylinder 410 is stopped, the piston rod 411 contracts, driving the support member 320 to move from the position in the non-working state to the position in the working state, until the length direction of the support member 320 is parallel to the axis of the polishing tank 200. In order to enable the piston rod 411 to drive the lifting member 400 to move more smoothly, the end of the piston rod 411 is connected to the lifting member 400 with a connecting block 412, wherein the connecting block 412 is rotatably connected to the piston rod 411.

[0035] like Figure 2 As shown, in order to increase the efficiency of polishing the workpiece 310, a plurality of support members 320 can be evenly arranged along the circumference of the polishing tank 200, and a plurality of rotatable workpiece clamping parts 300 are arranged on the support members 320. Each support member 320 is connected to the frame 100 through its own lifting mechanism, which increases the number of workpieces 310 polished at one time.

[0036] like Figure 2 As shown, in the present embodiment, the support member 320 is fixed on the lifting member 400, and the angle between the surface to be polished of the workpiece 310 and the rotation direction of the polishing trough 200 is fixed. Of course, the support member 320 can also be rotatably connected to the lifting member 400, and the support member 320 can rotate around its own axis. For example, an angle adjustment motor (not shown in the figure) can also be fixed on the frame 100, and the output shaft of the angle adjustment motor is connected to the support member 320. When the force rheological polishing device is working, the angle adjustment motor drives the support member 320 to rotate around the axis of the support member 320 itself, thereby adjusting the angle between the surface to be polished of the workpiece 310 and the rotation direction of the polishing trough 200.

[0037] like Figure 5As shown, the inner peripheral wall of the polishing tank 200 extends outwardly from the bottom of the tank toward the tank opening. In this embodiment, the support member 320 can be arranged close to the inner peripheral wall of the polishing tank 200. When the polishing tank 200 rotates, the centrifugal force throws the polishing liquid toward the inner peripheral wall, and the polishing liquid can reach a higher height, and is thrown to all workpieces 310 while saving the polishing liquid. Preferably, the angle α between the bottom edge of the polishing tank 200 and the inner peripheral wall of the polishing tank 200 is 90°, and the central position of the polishing tank 200 is convex upward. In order to facilitate the replacement of the polishing liquid, a liquid replacement hole 210 is also provided on the polishing tank 200.

[0038] like Figure 1 and Figure 2 As shown, a cooling fan 500 is also provided above the polishing tank 200. The cooling fan 500 cools the polishing liquid in the working state during the polishing process to prevent the polishing liquid from overheating and affecting the polishing performance.

[0039] like Figure 1 As shown, when the mechanorheological polishing device of this embodiment is used for polishing, first, a proper amount of polishing liquid is added into the polishing trough 200, and a number of workpieces 310 are clamped on the workpiece clamping part 300; the cylinder 410 is started, and the workpiece clamping part 300 is driven to park in the polishing trough 200; the spindle motor 220, the rotation motor 330 and the cooling fan 500 are started respectively, the polishing trough 200 and the workpiece clamping part 300 rotate, and the polishing surface of the workpiece 310 begins to be polished.

[0040] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A mechanorheological polishing device, comprising a frame (100), characterized in that: The frame (100) is provided with a rotatable polishing trough (200) and a rotatable workpiece clamping portion (300), wherein the workpiece clamping portion (300) is located in the polishing trough (200); the frame (100) is connected with a support member (320), wherein the support member (320) is arranged close to the inner peripheral wall of the polishing trough (200); the inner peripheral wall of the polishing trough (200) extends outwardly from the bottom of the trough in an inclined direction toward the trough opening; the angle α between the edge of the bottom surface of the polishing trough (200) and the inner peripheral wall of the polishing trough (200) is 90°, and the central position of the polishing trough (200) is convex upward.

2. A mechanorheological polishing device according to claim 1, characterized in that: It also includes a spindle system for driving the polishing tank (200) to rotate, and the spindle system includes a spindle (210) fixed to the polishing tank (200) and a spindle motor (220) for driving the spindle (210) to rotate.

3. A mechanorheological polishing device according to claim 1, characterized in that: When a workpiece (310) is fixed on the workpiece clamping portion (300), the angle between the curved surface to be polished of the workpiece (310) and the rotation direction of the polishing material tank (200) is between 10° and 60°.

4. A mechanorheological polishing device according to claim 3, characterized in that: The support member (320) is provided with the workpiece clamping portion (300) and a rotation motor (330) for driving the workpiece clamping portion (300) to rotate.

5. A mechanorheological polishing device according to claim 4, characterized in that: An angle adjustment motor is fixedly arranged on the frame (100), and an output shaft of the angle adjustment motor is connected to the support member (320).

6. A mechanorheological polishing device according to claim 4, characterized in that: There are a plurality of workpiece clamping parts (300); a driving gear is fixed on the output shaft of the self-rotating motor (330); a driven gear (332) is fixed on each of the workpiece clamping parts (300); the driving gear is meshed with one of the driven gears (332), and the other two adjacent driven gears (332) are meshed; the workpiece clamping parts (300) are rotatably supported on the support member (320) via a bearing (331).

7. A mechanorheological polishing device according to claim 4, characterized in that: The frame (100) is also provided with a lifting mechanism, which comprises a lifting member (400) and a cylinder (410) fixed on the frame (100); one end of the lifting member (400) is hinged to the frame (100), and the other end is connected to the support member (320); a piston rod (411) of the cylinder (410) is connected to the lifting member (400), and a straight line where the piston rod (411) is located is staggered with a straight line where the lifting member (400) is located.

8. A force rheological polishing method, characterized in that: Utilizing the mechanorheological polishing device described in claim 1, the mechanorheological polishing method comprises the following steps: S1, adding polishing liquid into the polishing trough (200), and clamping the workpiece (310) on the workpiece clamping part (300); S2, driving the polishing trough (200) and the workpiece clamping part (300) to rotate, and the polishing liquid and the surface to be polished of the workpiece (310) move relative to each other.

9. A mechanorheological polishing method according to claim 8, characterized in that: When executing step S2, the angle between the curved surface to be polished of the workpiece (310) and the rotation direction of the polishing tank (200) is between 10° and 60°.

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