A high-speed reciprocating polishing-based ultra-precision metal workpiece grinding device

Abstract

The application discloses a high-speed reciprocating polishing-based super-precision metal workpiece grinding device and relates to the technical field of metal polishing. Specifically comprising an outer shell, two groups of eccentric shaft assemblies are rotationally connected to the inner side of the outer shell, one same "Y"-shaped swing arm is movably connected to one side of the two groups of eccentric shaft assemblies, and a transition block is slidably connected to the other end of the "Y"-shaped swing arm. The two groups of eccentric shaft assemblies are arranged differently from the single-shaft double-eccentric sleeve of the Sandvik type, the two groups of eccentric shaft assemblies utilize the phase difference of the eccentric vectors, on one hand, the eccentricity of the two groups of eccentric shaft assemblies can drive the first-order translational motion of the "Y"-shaped swing arm, on the other hand, the phase difference of the eccentric vectors can also drive the second-order rotational motion of the "Y"-shaped swing arm, and the first-order motion and the second-order motion are mutually vector superposed, so that the theoretical stay without dead points can be ensured, and the reciprocating amplitude can be adjusted in a large range.

Description

Technical Field

[0001] This invention relates to the field of metal grinding technology, and in particular to an ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding. Background Technology

[0002] Metal parts need to be polished to ensure their surface is smooth, which is beneficial for their compatibility with other parts and also ensures the surface roughness.

[0003] Traditional metal part polishing is mostly divided into two types: shot blasting and abrasive wheel polishing. Abrasive wheel polishing is further divided into rotary abrasive wheel polishing and reciprocating abrasive wheel polishing according to the different motion types of the abrasive wheel.

[0004] For high-speed reciprocating grinding wheels, in existing technologies, the reciprocating drive of the grinding wheel uses a single radial cam or a single eccentric wheel drive, which has the following drawbacks: At frequencies above 1500 spm, the inertial force increases dramatically, and there is a theoretical dwell time at the bottom dead center, resulting in uneven wear marks.

[0005] Therefore, this invention proposes an ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and propose an ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A high-speed reciprocating grinding ultra-precision metal workpiece grinding device includes an outer shell. Two sets of eccentric shaft assemblies are rotatably connected to the inner side of the outer shell. One side of the two sets of eccentric shaft assemblies is movably connected to the same "Y"-shaped swing arm. The other end of the "Y"-shaped swing arm is slidably connected to a transition block. The other end of the transition block is rotatably connected to a grinding seat. A grinding head for grinding metal is fixed to the outer wall of the grinding seat by bolts. The grinding seat is slidably connected to the inner wall of the outer shell by a linear slide rail. The eccentric shaft assembly includes an eccentric shaft and a bushing disposed in the eccentric region of the eccentric shaft, and the "Y"-shaped swing arm is rotatably connected to the outer wall of the bushing. One side of the outer casing is also provided with a drive mechanism for driving the eccentric shaft at the same speed.

[0008] Preferably, the included angle between the eccentricity direction vectors of the two sets of eccentric shaft assemblies is in the range of [0, 180°].

[0009] Furthermore: the inner side of the transition block is elastically supported by a slide block, and one side of the slide block is rotatably connected to a limit wheel via a wheel axle. The limit wheel rolls and engages with the side wall of the "Y"-shaped swing arm. The slide block is slidably connected to the inner wall of the transition block, and the transition block is elastically connected to the slide block through an elastic body.

[0010] Based on the aforementioned scheme: the drive mechanism includes a drive box and a transmission part. The bottom of the drive box is connected to the side wall of the outer shell through a linear motion component, and the output end of the drive box is driven and engaged with the outer wall of two eccentric shafts through the transmission part.

[0011] A preferred embodiment of the aforementioned scheme is as follows: the transmission part includes two sets of variable diameter pulleys, fixed diameter pulleys, and a synchronous belt. The two fixed diameter pulleys are respectively fixed to the outer walls of two eccentric shafts. The two variable diameter pulleys are coaxially arranged and correspond to the positions of the two fixed diameter pulleys. The synchronous belt is driven and engaged with the outer walls of the variable diameter pulleys and the fixed diameter pulleys. The side walls of the two variable diameter pulleys are respectively fixed with a solid shaft and a hollow shaft. The hollow shafts are driven and engaged with the output end of the drive box.

[0012] As a further embodiment of the present invention: the variable diameter pulley includes a base wheel and an arc-shaped wheel block that is radially slidably connected to the outer wall of the base wheel via a sliding column. The base wheel is fixed to a solid shaft or a hollow shaft, and the arc-shaped wheel block is in transmission cooperation with the base wheel.

[0013] Meanwhile, a timing disc is rotatably connected to one side of the base wheel, and a torsion spring is provided between the base wheel and the timing disc. A limit post is fixed to the side wall of the sliding column, and an inclined sliding groove is provided on the inner wall of the timing disc. The inclined sliding groove and the limit post are in a movable limiting fit.

[0014] As a preferred embodiment of the present invention: the linear motion assembly includes a motor, a bracket, and a threaded rod. The bracket is fixed to the side wall of the housing by bolts. A guide rod is fixed to the inner side of the bracket. A mounting seat is fixed to the bottom of the drive box by bolts. The mounting seat is slidably connected to the outer wall of the guide rod. The threaded rod is rotatably connected to the inner wall of the bracket. The outer wall of the threaded rod is threadedly connected to the inner wall of the mounting seat. The motor is fixed to the side wall of the bracket by bolts, and the output end of the motor is fixed to the end of the threaded rod.

[0015] Meanwhile, pleated pads are fixed on both sides of the grinding head, and the other end of the pleated pads is fixed to the inner wall of the outer shell.

[0016] As a preferred embodiment of the present invention: the bushing is also eccentrically configured, and the bushing is rotatably connected to the outer wall of the eccentric region of the eccentric shaft; Furthermore, the eccentric region of the eccentric shaft and the end of the bushing are both provided with grooves, and the outer wall of the eccentric shaft is connected to a locking plate that can only slide axially. The end face of the locking plate is provided with a protruding rib that engages with the groove. The eccentric shaft has a key-shaped groove on its circumferential wall, and a key-shaped protrusion is fixed on the inner side wall of the locking plate. The key-shaped protrusion is slidably connected to the inner wall of the key-shaped groove, and the locking plate is fixed to the side wall of the eccentric region of the eccentric shaft by a locking pin.

[0017] The beneficial effects of this invention are as follows: 1. This invention, by setting two sets of eccentric shaft assemblies, and the arrangement of the two sets of eccentric shaft assemblies is different from that of the Sandvik single-axis double eccentric sleeve, the two sets of eccentric shaft assemblies utilize the phase difference of their eccentric vectors. On the one hand, they can use their own eccentricity to drive the first-order translational motion of the "Y"-shaped swing arm. On the other hand, they can also use the phase difference of the eccentric vectors to drive the second-order rotational motion of the "Y"-shaped swing arm. The first-order motion and the second-order motion are vectorically superimposed on each other, so as to ensure that there is no theoretical dead point and that the reciprocating amplitude can be adjusted over a wide range.

[0018] 2. In this invention, on the one hand, by setting a limiting wheel and an elastic body, the limiting wheel can guide the transition block to slide and connect with the "Y"-shaped swing arm, and the elasticity of the elastic body can compensate for wear, preventing the vibration and noise of the device from being aggravated by wear gaps. On the other hand, when the grinding head is grinding at high speed, the reaction force it receives is uneven, which will generate high-frequency vibration. The elastic body can also absorb the high-frequency vibration, protect the core components related to eccentricity and reduce noise.

[0019] 3. This invention, through targeted design of the transmission part, utilizes the cooperation of two sets of variable diameter pulleys, fixed diameter pulleys, and synchronous belts to achieve stepless adjustment of the transmission ratio, thereby changing the phase difference of the two sets of eccentric shaft assemblies and realizing flexible adjustment of the grinding amplitude under different grinding conditions.

[0020] 4. The present invention, by providing a pleated pad, can seal the gap between the grinding head and the outer shell, preventing grinding metal particles from entering the interior of the outer shell, thereby increasing the lifespan of the entire device.

[0021] 5. In this invention, by also setting the bushing as an eccentric structure, its eccentric vector can be superimposed with that of the eccentric shaft, thereby further increasing the adjustment range of the eccentric drive of the "Y"-shaped swing arm, and ultimately further increasing the adjustment range of the reciprocating vibration amplitude of the grinding head. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding proposed in this invention. Figure 2 This is a schematic diagram of one side of the eccentric shaft assembly of an ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding proposed in this invention. Figure 3 This is a schematic diagram of the other side of the eccentric shaft assembly of an ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding proposed in this invention. Figure 4This is a schematic diagram of the transition block and "Y"-shaped swing arm cooperation structure of an ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding proposed in this invention. Figure 5 This is a schematic diagram of the transmission part of an ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding proposed in this invention. Figure 6 This is a schematic diagram of a variable diameter pulley structure for an ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding proposed in this invention. Figure 7 This is a schematic diagram of the torsion spring structure of an ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding proposed in this invention. Figure 8 This is a schematic diagram of the linear movement component of an ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding proposed in this invention.

[0023] In the diagram: 1. Outer shell; 2. Eccentric shaft assembly; 3. Drive mechanism; 4. Linear slide rail; 5. Pleated pad; 6. Grinding head; 7. Grinding base; 8. Transition block; 9. "Y"-shaped swing arm; 10. Bushing; 11. Eccentric shaft; 12. Locking plate; 13. Locking pin; 14. Groove; 15. Key-shaped protrusion; 16. Key-shaped groove; 17. Wheel axle; 18. Limiting wheel; 19. Elastomer; 20. Slide seat 21. Variable diameter pulley; 22. Fixed diameter pulley; 23. Synchronous belt; 24. Solid shaft; 25. Hollow shaft; 26. Drive box; 27. Linear motion assembly; 28. Base wheel; 29. ​​Arc-shaped wheel block; 30. Sliding column; 31. Limiting column; 32. Inclined slide groove; 33. Synchronous disc; 34. Torsion spring; 35. Mounting base; 36. Motor; 37. Bracket; 38. Guide rod; 39. Threaded rod. Detailed Implementation

[0024] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0025] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] Example 1: An ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding, such as Figures 1-8As shown, the device includes an outer shell 1. Two sets of eccentric shaft assemblies 2 are rotatably connected to the inner side of the outer shell 1. The same "Y"-shaped swing arm 9 is movably connected to one side of the two sets of eccentric shaft assemblies 2. A transition block 8 is slidably connected to the other end of the "Y"-shaped swing arm 9. A grinding seat 7 is rotatably connected to the other end of the transition block 8. A grinding head 6 for grinding metal is fixed to the outer wall of the grinding seat 7 by bolts. The grinding seat 7 is slidably connected to the inner wall of the outer shell 1 by a linear slide rail 4. The eccentric shaft assembly 2 includes an eccentric shaft 11 and a bushing 10 disposed in the eccentric region of the eccentric shaft 11, and the "Y"-shaped swing arm 9 is rotatably connected to the outer wall of the bushing 10.

[0027] A drive mechanism 3 for driving the eccentric shaft 11 at the same speed is also provided on one side of the outer casing 1.

[0028] The included angle between the eccentric direction vectors of the two sets of eccentric shaft assemblies 2 is in the range of [0, 180°].

[0029] In this embodiment, when the eccentric directions of the two sets of eccentric shaft assemblies 2 are consistent, the eccentric vectors generated on the "Y"-shaped swing arm 9 when the two sets of eccentric shaft assemblies 2 rotate synchronously are completely consistent. The "Y"-shaped swing arm 9 only has first-order left-right and up-down movement. The left-right movement is transmitted to the grinding head 6 through the transition block 8 and the grinding seat 7, causing the grinding head 6 to swing left and right for grinding. When the eccentric directions of the two sets of eccentric shaft assemblies 2 are inconsistent, that is, when there is a phase difference in their eccentricity, since the eccentric vectors at the top two ends of the "Y"-shaped swing arm 9 are different, the "Y"-shaped swing arm 9 will not only have first-order left-right and up-down linear movement, but also a second-order rotational movement. For the bottom end of the "Y"-shaped swing arm 9, the second-order rotational movement will also be vectorically superimposed with the left-right movement of the "Y"-shaped swing arm 9. When the vector angle is less than 90 degrees, the two are numerically superimposed, and the reciprocating vibration amplitude of the grinding head 6 increases. When the vector angle is greater than 90 degrees, the two cancel each other out vertically, and the reciprocating vibration amplitude of the grinding head 6 decreases.

[0030] This device, by setting two sets of eccentric shaft assemblies 2, differs from the arrangement of the Sandvik single-axis double eccentric sleeve. The two sets of eccentric shaft assemblies 2 utilize the phase difference of their eccentric vectors to drive the first-order translational motion of the "Y"-shaped swing arm 9 using their own eccentricity. On the other hand, they can also drive the second-order rotational motion of the "Y"-shaped swing arm 9 by utilizing the phase difference of the eccentric vectors. The first-order motion and the second-order motion are vectorically superimposed on each other, thus ensuring that there is no theoretical dead point and that the reciprocating amplitude can be adjusted over a wide range.

[0031] To solve the wear compensation problem; such as Figure 4As shown, the inner side of the transition block 8 is elastically supported by a slide block 20. One side of the slide block 20 is rotatably connected to a limiting wheel 18 via a wheel axle 17. The limiting wheel 18 rolls against the side wall of the "Y"-shaped swing arm 9.

[0032] The slide block 20 is slidably connected to the inner wall of the transition block 8, and the transition block 8 is elastically connected to the slide block 20 through the elastic body 19.

[0033] The elastic body 19 can generate an inward elastic force, which is applied to the limiting wheel 18 through the slide 20. The two sets of limiting wheels 18 tightly clamp the "Y"-shaped swing arm 9, and the "Y"-shaped swing arm 9 and the transition block 8 are linearly slidably engaged by the guide of the limiting wheels 18.

[0034] This device, on the one hand, by setting a limiting wheel 18 and an elastic body 19, can not only guide the transition block 8 and the "Y"-shaped swing arm 9 to slide, but also use the elasticity of the elastic body 19 to compensate for wear and prevent the vibration and noise of the device from being aggravated by wear gaps. On the other hand, when the grinding head 6 is grinding at high speed, the reaction force it receives is uneven, which will generate high-frequency vibration. The elastic body 19 can also absorb the high-frequency vibration, protect the core components related to eccentricity and reduce noise.

[0035] To solve the phase adjustment problem; such as Figure 5 As shown, the drive mechanism 3 includes a drive box 26 and a transmission part. The bottom of the drive box 26 is connected to the side wall of the outer shell 1 through a linear motion component 27. The output end of the drive box 26 is driven and engaged with the outer wall of two eccentric shafts 11 through the transmission part.

[0036] The transmission part includes two sets of variable diameter pulleys 21, fixed diameter pulleys 22, and synchronous belts 23. The two fixed diameter pulleys 22 are respectively fixed to the outer walls of the two eccentric shafts 11. The two variable diameter pulleys 21 are coaxially arranged and correspond to the positions of the two fixed diameter pulleys 22. The synchronous belt 23 is driven and engaged with the outer walls of the variable diameter pulleys 21 and the fixed diameter pulleys 22. The side walls of the two variable diameter pulleys 21 are respectively fixed with a solid shaft 24 and a hollow shaft 25. The hollow shafts 25 are driven and engaged with the output end of the drive box 26.

[0037] The specific type of the drive box 26 is not limited in this device. It can be used in conjunction with a motor and a reducer. Its purpose is to synchronously drive the solid shaft 24 and the hollow shaft 25 to rotate. Since it is existing technology and relatively mature, those skilled in the art are familiar with its structure and operating principle. This embodiment has not made any creative effort on it, so it will not be described in detail.

[0038] The variable diameter pulley 21 includes a base wheel 28 and an arc-shaped wheel block 29 that is radially slidably connected to the outer wall of the base wheel 28 via a sliding column 30. The base wheel 28 is fixed to a solid shaft 24 or a hollow shaft 25, and the arc-shaped wheel block 29 is in transmission cooperation with the base wheel 28.

[0039] A timing disc 33 is rotatably connected to one side of the base wheel 28. A torsion spring 34 is provided between the base wheel 28 and the timing disc 33. A limit post 31 is fixed to the side wall of the sliding column 30. An inclined sliding groove 32 is provided on the inner wall of the timing disc 33. The inclined sliding groove 32 and the limit post 31 are in a movable limiting cooperation.

[0040] The torsion spring 34 generates an elastic torque between the base wheel 28 and the synchronous disc 33. This elasticity is transmitted through the limiting post 31 and the inclined slide groove 32, giving the sliding post 30 and the arc-shaped wheel block 29 an outward expanding elastic force. This tightens the synchronous belt 23, ensuring reliable transmission between the entire variable diameter pulley 21 and the fixed diameter pulley 22. Furthermore, when the center distance between the variable diameter pulley 21 and the fixed diameter pulley 22 changes, the transmission radius of the entire variable diameter pulley 21 changes because the circumference of the synchronous belt 23 remains constant, thereby changing the transmission ratio. Based on this, in actual use, the center distance between the two sets of variable diameter pulleys 21 and fixed diameter pulleys 22 can be changed first to make their transmission ratios different. Then, the solid shaft 24 and the hollow shaft 25 are driven to rotate synchronously through the drive box 26. At this time, the rotation angles of the two variable diameter pulleys 21 are different, thus forming a phase difference. After the required phase difference is achieved, the center distance between the two sets of variable diameter pulleys 21 and fixed diameter pulleys 22 can be changed again to make their transmission ratios the same, and then vibratory grinding is performed.

[0041] This device, through targeted design of the transmission part, utilizes the cooperation of two sets of variable diameter pulleys 21, fixed diameter pulleys 22, and synchronous belts 23 to achieve stepless adjustment of the transmission ratio, thereby changing the phase difference between the two sets of eccentric shaft assemblies 2 and realizing flexible adjustment of the grinding amplitude under different grinding conditions.

[0042] To solve the problem of center distance adjustment; such as Figure 8 As shown, the linear motion assembly 27 includes a motor 36, a bracket 37, and a threaded rod 39. The bracket 37 is fixed to the side wall of the outer casing 1 by bolts. A guide rod 38 is fixed to the inner side of the bracket 37. A mounting base 35 is fixed to the bottom of the drive box 26 by bolts. The mounting base 35 is slidably connected to the outer wall of the guide rod 38, and the threaded rod 39 is rotatably connected to the inner wall of the bracket 37. The outer wall of the threaded rod 39 is threadedly connected to the inner wall of the mounting base 35. The motor 36 is fixed to the side wall of the bracket 37 by bolts, and the output end of the motor 36 is fixed to the end of the threaded rod 39.

[0043] When the motor 36 starts, it can drive the threaded rod 39 to rotate, thereby driving the mounting base 35 to move linearly along the guide rod 38 through the thread action, thereby driving the drive box 26 to move linearly, thereby changing the center distance of the two sets of variable diameter pulleys 21, fixed diameter pulleys 22 and synchronous belts 23.

[0044] To solve the dust prevention problem; such as Figure 1 As shown, pleated pads 5 are fixed on both sides of the grinding head 6, and the other end of the pleated pads 5 is fixed to the inner wall of the outer shell 1.

[0045] This device, by providing a pleated pad 5, can seal the gap between the grinding head 6 and the outer casing 1, preventing grinding metal particles from entering the interior of the outer casing 1, thereby increasing the lifespan of the entire device.

[0046] In this embodiment, when the eccentric directions of the two sets of eccentric shaft assemblies 2 are consistent, the eccentric vectors generated on the "Y"-shaped swing arm 9 when the two sets of eccentric shaft assemblies 2 rotate synchronously are completely consistent. The "Y"-shaped swing arm 9 only has first-order left-right and up-down movement. The left-right movement is transmitted to the grinding head 6 through the transition block 8 and the grinding seat 7, causing the grinding head 6 to swing left and right for grinding. When the eccentric directions of the two sets of eccentric shaft assemblies 2 are inconsistent, that is, when there is a phase difference in their eccentricity, since the eccentric vectors at the top two ends of the "Y"-shaped swing arm 9 are different, the "Y"-shaped swing arm 9 will not only produce... In addition to the first-order linear movement left and right and up and down, there will also be a second-order rotational motion. For the bottom end of the "Y"-shaped swing arm 9, the second-order rotational motion will also be vector-superimposed with the left and right movement of the "Y"-shaped swing arm 9. When the vector angle is less than 90 degrees, the two are numerically superimposed, and the reciprocating vibration amplitude of the grinding head 6 increases. When the vector angle is greater than 90 degrees, the two cancel each other out vertically, and the reciprocating vibration amplitude of the grinding head 6 decreases. In addition, the elastic body 19 can generate an inward elastic force, which is applied to the limiting wheel 18 through the slide 20. Using two sets of limiting wheels 18 tightly clamps the "Y"-shaped swing arm 9, and then uses the guide of the limiting wheel 18 to achieve a linear sliding fit between the "Y"-shaped swing arm 9 and the transition block 8. At the same time, the torsion spring 34 can generate an elastic torque between the base wheel 28 and the synchronous disc 33. The elasticity is transmitted through the limiting post 31 and the inclined slide groove 32, so that the sliding post 30 and the arc-shaped wheel block 29 have an outward expanding elastic force, thereby tightening the synchronous belt 23, so that the entire variable diameter pulley 21 and the fixed diameter pulley 22 can reliably transmit power. In addition, when the center distance between the variable diameter pulley 21 and the fixed diameter pulley 22 changes, due to... The circumference of the synchronous belt 23 remains unchanged, which changes the transmission radius of the entire variable diameter pulley 21, thereby changing the transmission ratio. Based on this, in actual use, the center distance between the two sets of variable diameter pulleys 21 and the fixed diameter pulley 22 can be changed first to make their transmission ratios different. Then, the solid shaft 24 and the hollow shaft 25 are driven to rotate synchronously through the drive box 26. At this time, the rotation angles of the two variable diameter pulleys 21 are different, thus forming a phase difference. After the required phase difference is achieved, the center distance between the two sets of variable diameter pulleys 21 and the fixed diameter pulley 22 is changed again to make their transmission ratios the same, and then vibratory grinding is performed.

[0047] Example 2: An ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding, such as Figure 2 , 3 As shown, in order to solve the eccentricity problem, this embodiment makes the following improvements based on embodiment 1: the bushing 10 is also eccentrically set, and the bushing 10 is rotatably connected to the outer wall of the eccentric region of the eccentric shaft 11.

[0048] Furthermore, the eccentric region of the eccentric shaft 11 and the end of the bushing 10 are both provided with grooves 14. The outer wall of the eccentric shaft 11 is connected to a locking plate 12 that can only slide axially. The end face of the locking plate 12 is provided with a protruding rib that engages with the groove 14.

[0049] The eccentric shaft 11 has a key-shaped groove 16 on its circumferential wall, and a key-shaped protrusion 15 is fixed on the inner side wall of the locking plate 12. The key-shaped protrusion 15 is slidably connected to the inner wall of the key-shaped groove 16, and the locking plate 12 is fixed to the side wall of the eccentric region of the eccentric shaft 11 by a locking pin 13.

[0050] In this embodiment, the eccentric shaft 11 has its own eccentricity, and the bushing 10 also has its eccentricity. The "Y"-shaped swing arm 9 is rotatably connected to the outer wall of the bushing 10. The eccentric drive it receives is equivalent to the sum of the eccentric vectors of the bushing 10 and the eccentric vector of the eccentric shaft 11. At the same time, when the locking pin 13 is released and the locking plate 12 moves axially along the eccentric shaft 11, the ribs and grooves 14 on the side wall of the locking plate 12 are not along the river. At this time, the bushing 10 can rotate relative to the eccentric shaft 11, thereby changing the sum of the eccentric vectors.

[0051] This device, by also setting the bushing 10 as an eccentric structure, allows the eccentric vector of the bushing 10 to be superimposed on the eccentric vector of the eccentric shaft 11, thereby further increasing the adjustment range of the eccentric drive of the "Y"-shaped swing arm 9, and ultimately further increasing the adjustment range of the reciprocating vibration amplitude of the grinding head 6.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-speed reciprocating grinding device for ultra-precision metal workpieces, comprising a housing (1), characterized in that, The inner side of the outer shell (1) is rotatably connected to two sets of eccentric shaft assemblies (2). One side of the two sets of eccentric shaft assemblies (2) is movably connected to the same "Y"-shaped swing arm (9). The other end of the "Y"-shaped swing arm (9) is slidably connected to a transition block (8). The other end of the transition block (8) is rotatably connected to a grinding seat (7). The outer wall of the grinding seat (7) is fixed with a grinding head (6) for grinding metal by bolts. The grinding seat (7) is slidably connected to the inner wall of the outer shell (1) by a linear slide rail (4). The eccentric shaft assembly (2) includes an eccentric shaft (11) and a bushing (10) disposed in the eccentric region of the eccentric shaft (11), and the "Y"-shaped swing arm (9) is rotatably connected to the outer wall of the bushing (10); One side of the outer casing (1) is also provided with a drive mechanism (3) for driving the eccentric shaft (11) at the same speed.

2. A high-speed reciprocating polishing-based ultra-precision metal workpiece grinding device according to claim 1, characterized in that, The range of the included angle between the eccentric direction vectors of the two sets of eccentric shaft assemblies (2) is [0, 180°].

3. A high-speed reciprocating polishing-based ultra-precision metal workpiece grinding device according to claim 1, characterized in that, The inner side of the transition block (8) is elastically supported by a slide (20). One side of the slide (20) is rotatably connected to a limiting wheel (18) via a wheel axle (17). The limiting wheel (18) rolls against the side wall of the "Y"-shaped swing arm (9). The slide (20) is slidably connected to the inner wall of the transition block (8), and the transition block (8) is elastically connected to the slide (20) through an elastic body (19).

4. The ultra-precision metal workpiece grinding device based on high-speed reciprocating polishing according to claim 1, characterized in that, The drive mechanism (3) includes a drive box (26) and a transmission part. The bottom of the drive box (26) is connected to the side wall of the outer shell (1) through a linear motion component (27). The output end of the drive box (26) is driven and engaged with the outer wall of two eccentric shafts (11) through the transmission part.

5. The ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding according to claim 4, characterized in that, The transmission part includes two sets of variable diameter pulleys (21), fixed diameter pulleys (22) and synchronous belts (23). The two fixed diameter pulleys (22) are respectively fixed to the outer walls of the two eccentric shafts (11). The two variable diameter pulleys (21) are arranged coaxially and correspond to the positions of the two fixed diameter pulleys (22). The synchronous belt (23) is driven and engaged with the outer walls of the variable diameter pulleys (21) and the fixed diameter pulleys (22). The side walls of the two variable diameter pulleys (21) are respectively fixed with solid shafts (24) and hollow shafts (25). The hollow shafts (25) are driven and engaged with the output end of the drive box (26).

6. The ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding according to claim 5, characterized in that, The variable diameter pulley (21) includes a base wheel (28) and an arc-shaped wheel block (29) that is radially slidably connected to the outer wall of the base wheel (28) via a sliding column (30). The base wheel (28) is fixed to a solid shaft (24) or a hollow shaft (25), and the arc-shaped wheel block (29) is in transmission cooperation with the base wheel (28).

7. The ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding according to claim 6, characterized in that, A timing disc (33) is rotatably connected to one side of the base wheel (28). A torsion spring (34) is provided between the base wheel (28) and the timing disc (33). A limit post (31) is fixed to the side wall of the sliding column (30). An inclined sliding groove (32) is provided on the inner wall of the timing disc (33). The inclined sliding groove (32) and the limit post (31) are in a movable limiting cooperation.

8. The ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding according to claim 4, characterized in that, The linear motion assembly (27) includes a motor (36), a bracket (37), and a threaded rod (39). The bracket (37) is fixed to the side wall of the outer casing (1) by bolts. A guide rod (38) is fixed to the inner side of the bracket (37). A mounting seat (35) is fixed to the bottom of the drive box (26) by bolts. The mounting seat (35) is slidably connected to the outer wall of the guide rod (38), and the threaded rod (39) is rotatably connected to the inner wall of the bracket (37). The outer wall of the threaded rod (39) is threadedly connected to the inner wall of the mounting seat (35). The motor (36) is fixed to the side wall of the bracket (37) by bolts, and the output end of the motor (36) is fixed to the end of the threaded rod (39).

9. The ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding according to claim 1, characterized in that, Both sides of the grinding head (6) are fixed with pleated pads (5), and the other end of the pleated pads (5) is fixed to the inner wall of the outer shell (1).

10. The ultra-precision metal workpiece grinding device based on high-speed reciprocating grinding according to claim 1, characterized in that, The bushing (10) is also eccentrically set, and the bushing (10) is rotatably connected to the outer wall of the eccentric region of the eccentric shaft (11); Furthermore, the eccentric region of the eccentric shaft (11) and the end of the bushing (10) are both provided with grooves (14), and the outer wall of the eccentric shaft (11) is connected to a locking plate (12) that can only slide axially. The end face of the locking plate (12) is provided with a protruding rib that engages with the groove (14). The eccentric shaft (11) has a key-shaped groove (16) on its circumferential wall, and a key-shaped protrusion (15) is fixed on the inner side wall of the locking plate (12). The key-shaped protrusion (15) is slidably connected to the inner wall of the key-shaped groove (16), and the locking plate (12) is fixed to the side wall of the eccentric region of the eccentric shaft (11) by a locking pin (13).

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