A multi-station double-wheel balanced swing polishing device

Abstract

The present application relates to the field of polishing and grinding equipment, in particular to a multi-station double-wheel balanced swing polishing and grinding equipment, which comprises a frame, a fixing device for fixing workpieces and a polishing device for polishing workpieces arranged on the frame, and further comprises a double-sand-wheel balanced swing device; the double-sand-wheel balanced swing device comprises a support frame fixed on the frame, a swing block rotatably connected to the support frame through a central shaft, two sand wheels respectively connected to the upper and lower ends of the swing block through two rotating shafts, and the two ends of the swing block elastically connected to the support frame so that the swing block can swing around the central shaft, and the upper and lower sand wheels swing synchronously in front and back; the frame is further provided with a second driving device for driving the workpieces to approach or move away from the sand belt between the upper and lower sand wheels, so that the workpieces with different feeding amounts on the double stations can be simultaneously polished and ground with high efficiency and high quality, the output is doubled, and the efficiency and cost are saved.

Description

Technical Field

[0001] This invention relates to the field of polishing and grinding equipment, and in particular, to a multi-station dual-wheel balanced oscillating grinding device. Background Technology

[0002] For long, narrow workpieces, such as wrenches and hammers, taking wrenches as an example, they come into contact with the hand and are turned with force. Therefore, each wrench must be polished smooth before leaving the factory to prevent cuts to the hand.

[0003] To improve grinding efficiency, existing single-station grinding equipment has been upgraded to dual-station or multi-station grinding equipment, significantly increasing grinding efficiency. However, the following problems exist in practical applications: Figure 17 and Figure 18 As shown, for dual-station grinding equipment, when the upper workpiece is slightly bent during processing and handling, while the lower workpiece is basically not bent, resulting in different feed rates, the existing equipment often only grinds the upper workpiece. The lower workpiece is not in contact with the abrasive belt, resulting in incomplete or no grinding. Similarly, the workpieces in the existing equipment are constantly rotating. When rotating 180 degrees, due to the opposite bending direction, the lower workpiece contacts the abrasive belt first, while the upper workpiece does not, resulting in incomplete or no grinding. Therefore, under the same grinding time, the grinding effect of the upper and lower workpieces is very poor and incomplete. The rework rate in the above situation is very high, causing the working efficiency of dual-station grinding equipment to decrease rather than increase compared to single-station grinding equipment.

[0004] To solve the above problems, one proposal is to move the grinding area from area a to area b, utilizing the flexibility of the abrasive belt and feeding more workpieces to deform the belt, thereby grinding the upper and lower workpieces in the aforementioned situation, and ultimately achieving simultaneous grinding of the upper and lower workpieces. However, in this case, if... Figure 19 As shown, on the one hand, the sanding belt is in a passively taut state for a long time, which can easily lead to its breakage; on the other hand, the workpiece above is subjected to excessive feed rate and feed pressure, resulting in over-grinding, which drastically reduces the service life of the sanding belt and significantly increases production costs; furthermore, under the same feed rate, the polishing effect of the sanding belt in area b is not as good as that in area a, failing to meet production requirements. Therefore, in actual production, this solution has been proven unable to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art, at least to a certain extent, the technical problems in the related art, and to provide a solution to the problem that existing grinding equipment cannot simultaneously and effectively grind and polish workpieces with different feed rates at two stations with high quality.

[0006] A multi-station dual-wheel balanced oscillation grinding device includes a frame, a fixing device for fixing the workpiece and a grinding device for grinding the workpiece on the frame, and a dual-wheel balanced oscillation device. The grinding device includes two grinding wheels mounted on a frame, a first drive wheel, a sanding belt, and a first drive device fixed on the frame for driving the first drive wheel to rotate. The sanding belt is sleeved on the first drive wheel and the two grinding wheels, and the two grinding wheels are arranged vertically on the frame, one above the other. The dual grinding wheel balancing oscillating device includes a support frame fixed on the machine frame, an oscillating block rotatably connected to the support frame via a central shaft, two grinding wheels respectively connected to the upper and lower sides of the oscillating block via two rotating shafts, and the two ends of the oscillating block elastically connected to the support frame so that the oscillating block can oscillate around the central shaft, thereby making the upper and lower grinding wheels oscillate synchronously back and forth. The frame is also equipped with a second drive device that drives the workpiece to move closer to or further away from the abrasive belt between the upper and lower abrasive wheels; Furthermore, the specific structure of the two ends of the swing block being elastically connected to the support frame includes a connecting block that connects the upper and lower end faces of the swing block respectively, a through hole provided on the connecting block, a pull rod with one end fixed to the support frame and the other end passing through and extending out of the through hole, an inner cap, a spring, an outer cap, and an adjusting nut sequentially sleeved on the pull rod, the inner cap being in contact with the connecting block, the outer cap being in contact with the adjusting nut, and the two ends of the spring being in contact with the inner cap and the outer cap respectively.

[0007] Furthermore, the fixing device includes a turntable, on which a crossbar is fixed. The two ends of the crossbar are respectively provided with a first bracket and a second bracket. The first bracket and the second bracket are provided with at least two sets of clamping and rotating devices for loosening or clamping the workpiece and driving the workpiece to rotate. Several sets of clamping and rotating devices are arranged vertically and parallel.

[0008] Furthermore, the pressing and rotating device includes a first rotating shaft provided on the first support, a sleeve provided on the second support, a telescopic sleeve located inside the sleeve and sliding relative to the sleeve, and a telescopic cylinder fixed on the second support. The telescopic cylinder is connected to one end of the telescopic sleeve to drive the telescopic sleeve to move inside the sleeve housing, and the other end of the telescopic sleeve is rotatably connected to the second rotating shaft through a bearing, and the second rotating shaft is connected to the second clamp. A first clamp is provided at one end of the first rotating shaft, and a second drive wheel is provided at the other end of the first rotating shaft; It also includes a third drive unit fixed on the first bracket, which drives each of the second drive wheels to rotate via a belt or gear set.

[0009] Furthermore, the pressing and rotating device includes a first rotating shaft provided on the first support and a fourth driving device for driving the first rotating shaft to rotate, a sleeve provided on the second support, a telescopic sleeve located inside the sleeve and sliding relative to the sleeve, and a telescopic cylinder fixed on the second support. The telescopic cylinder is connected to one end of the telescopic sleeve to drive the telescopic sleeve to move inside the sleeve housing, and the other end of the telescopic sleeve is rotatably connected to the second rotating shaft through a bearing, and the second rotating shaft is connected to the second clamp. A first clamp is provided at one end of the first rotating shaft.

[0010] Furthermore, the second driving device includes a second fixed plate, a first fixed plate mounted on the frame, a first lead screw fixed to the first fixed plate by a bearing, a first cylinder liner fixed to the second fixed plate and cooperating with the first lead screw, and a fifth driving device mounted on the frame and driving the first lead screw to rotate. The first fixed plate and the second fixed plate are slidably engaged. The second fixed plate is provided with two guide posts and a second lead screw fixed by bearings. The guide posts are fitted with outer sliding sleeves, which are fixed to the third fixed plate. The second fixed plate is also provided with a sixth driving device for driving the second lead screw to rotate. The second lead screw is fitted with a second cylinder sleeve, which is fixed to the fourth fixed plate. The fourth fixed plate is connected with two sliding sleeves that are slidably connected to the two guide posts. The two sliding sleeves are fitted over the corresponding two guide posts and are slidably connected to the guide posts. It also includes a buffer spring, one end of which is fixed to the third fixed plate and the other end of which is fixed to the fourth fixed plate. The turntable is rotatably connected to the third fixed plate.

[0011] Furthermore, it also includes a rocking device, which includes a rocking cylinder, one end of which is connected to the frame and the other end of which is connected to the crossbar.

[0012] Furthermore, it also includes a belt tensioning device, which includes an obtuse-angled plate hinged at one end in the first bracket, and a screw abutting at the other end. A pulley is rotatably connected at the obtuse angle of the obtuse-angled plate, and the pulley abuts against the belt.

[0013] Furthermore, it also includes a seventh driving device. The first driving device is connected to a guide sleeve, and a guide rail is fixed on the support frame. The guide sleeve and the guide rail are slidably connected. The first driving device is slidably mounted on the support frame through the guide sleeve and the guide rail. One end of the seventh driving device is connected to the guide sleeve, and the other end is connected to the support frame.

[0014] Furthermore, the clamping and rotating device consists of two sets, with the workpieces located between the first and second clamps corresponding one-to-one with the horizontal height of the centers of the upper and lower grinding wheels.

[0015] The main technical effects of this invention are reflected in the following aspects: 1. This invention, through a double grinding wheel balancing swing device, enables the simultaneous processing of two workpieces with different feed rates, truly achieving high quality and high efficiency while processing two workpieces simultaneously, thereby improving work efficiency, saving energy, ensuring processing quality, and achieving the goal of energy conservation and emission reduction; 2. The connecting block adopts an L-shape to provide space and prevent positional interference. One end of the pull rod is fixed to the support frame, and the other end passes through and extends out of the through hole. The diameter of the through hole is smaller than the outer diameter of the inner cap, but it should not be too small to prevent interference to the pull rod during swaying. Then, the inner cap, spring, outer cap, and adjusting nut are sequentially fitted outside the pull rod. The adjusting nut is threaded to the end of the pull rod. Tightening the nut makes the inner cap abut against the connecting block, and the outer cap abut against the adjusting nut. The two ends of the spring abut against the inner cap and the outer cap respectively, which can adjust the workpiece feed to make the swing block deflect. 3. Adjust the "hardness" of the spring force to overcome the swing; 4. Adjust the "hardness" according to the degree of polishing (whether it is over-polished). The greater the spring compression deformation, the tighter the adjusting nut is to adjust the spring, that is, the "harder" the swing. The smaller the spring compression deformation, the looser the adjusting nut is to adjust the spring, that is, the "softer" the swing. If there is over-polishing, then adjust the swing to be "softer"; if the polishing is not thorough, then adjust the swing to be "harder"; 5. The other end of the telescopic sleeve is connected to the second rotating shaft through a bearing. Specifically, the other end of the telescopic sleeve is arranged from the inside to the outside with a planar thrust bearing and several deep groove ball bearings, and is limited by a snap ring. The second rotating shaft is interference-fitted with the inner ring of the deep groove ball bearing. Preferably, the outer ring of the planar thrust bearing and the outer ring of the deep groove ball bearing are interference-fitted with the inner wall of the other end of the telescopic sleeve to minimize the friction generated when the telescopic cylinder is pressed. 5. Through the above design, where the upper workpiece and the center of the upper grinding wheel are at the same horizontal height, and the lower workpiece and the center of the lower grinding wheel are at the same horizontal height, testing shows that when the workpiece is applied to area a of the abrasive belt, the grinding effect is better because the grinding wheel acts as a support. If the workpiece is applied to area b, there is nothing to support the abrasive belt, which is prone to deformation, resulting in poor grinding effect. 6. When the abrasive belt is used for grinding in area b, it will deform uncontrollably. However, when it is used for grinding in area a, the abrasive belt deflects with the grinding wheel, allowing the abrasive belt to grind and polish the workpiece under the optimal feed rate and feed pressure, thereby extending the service life of the abrasive belt and effectively saving costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1This is a perspective view highlighting the second driving device of the present invention.

[0018] Figure 2 This is a three-dimensional schematic diagram highlighting the seventh driving device of the present invention.

[0019] Figure 3 The present invention provides a schematic diagram of the grinding device and fixing device, highlighting the fourth driving device.

[0020] Figure 4 for Figure 3 Enlarged schematic diagram of part G.

[0021] Figure 5 This is a schematic diagram of the structure of the grinding device and fixing device of the present invention, showing the telescopic cylinder.

[0022] Figure 6 A schematic diagram of a double grinding wheel balancing swing device for the support frame.

[0023] Figure 7 A schematic diagram of the protruding hanging lugs of the double grinding wheel balancing swing device.

[0024] Figure 8 This is a schematic diagram of the structure of the dual grinding wheel balancing oscillating device, highlighting the grinding wheel.

[0025] Figure 9 This is a schematic diagram of the structure of two sets of clamping and rotating devices.

[0026] Figure 10 This is a cross-sectional schematic diagram of the clamping and rotating device.

[0027] Figure 11 This is a schematic diagram of the structure when grinding two workpieces with the same feed rate.

[0028] Figure 12 This is a schematic diagram of a grinding process where the feed rate of the upper workpiece is greater than that of the lower workpiece.

[0029] Figure 13 This is a schematic diagram of the structure when the feed rate of the lower workpiece is greater than that of the upper workpiece during grinding.

[0030] Figure 14 for Figure 11 A left-side view diagram.

[0031] Figure 15 for Figure 12 A left-side view diagram.

[0032] Figure 16 for Figure 13 A left-side view diagram.

[0033] Figure 17 This is a schematic diagram of the existing grinding process.

[0034] Figure 18 for Figure 17 A top-down view.

[0035] Figure 19 This is a schematic diagram of the existing structure during area grinding.

[0036] Figure 20 This is a schematic diagram of the pressing and rotating device in Example 2.

[0037] Figure 21 This is a schematic diagram of the third driving device in Example 2.

[0038] Figure 22 for Figure 21 Front view diagram. Detailed Implementation

[0039] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0041] Example 1: As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown: A multi-station dual-wheel balanced oscillation grinding device includes a frame 1, on which a fixing device for fixing the workpiece and a grinding device for grinding the workpiece are provided, and also includes a dual-wheel balanced oscillation device. The grinding device includes two grinding wheels 21 mounted on the frame 1, a first drive wheel 22, a sanding belt 23, and a first drive device 24 fixed on the frame 1 for driving the first drive wheel 22 to rotate. The sanding belt 23 is sleeved on the first drive wheel 22 and the two grinding wheels 21, and the two grinding wheels 21 are arranged one above the other on the frame 1. The first driving device 24 is a motor, which drives the first driving wheel 22 to rotate, and drives the two grinding wheels 21 to rotate through the sanding belt 23 to feed the workpiece. The sanding belt 23 in area a is used for grinding and polishing the workpiece.

[0042] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown: The dual-grinding wheel balancing oscillating device includes a support frame 31 fixed on the machine frame 1 and an oscillating block 33 rotatably connected to the support frame 31 via a central shaft 32. Lugs 34 are provided on both sides of the support frame 31, and the two lugs 34 limit the two ends of the central shaft 32 and are tightened with screws to allow the oscillating block 33 to have oscillation space relative to the support frame 31. The central shaft 32 can be a fixed shaft or a hinge shaft. The oscillating block 33 is connected to the central shaft 32 via bearings. The two grinding wheels 21 are respectively connected to the same side of the upper and lower ends of the oscillating block 33 via two rotating shafts 35 to prevent misalignment. Interference allows the two grinding wheels 21 and the first drive wheel 22 to be located on the same vertical plane. At the same time, the two rotating shafts 35 are fixed inside the upper and lower ends of the swing block 33 by bearings and are respectively connected to the two grinding wheels 21. The two ends of the swing block 33 are elastically connected to the support frame 31 so that the swing block 33 can swing back and forth in a balanced manner around the central axis 32, thereby making the upper and lower grinding wheels 21 swing synchronously one forward and one backward. The synchronous one forward and one backward means that if the upper grinding wheel 21 swings forward, the lower grinding wheel 21 swings backward; if the lower grinding wheel 21 swings forward, the upper grinding wheel 21 swings backward. It should be noted that the bending amplitude of a workpiece during rough machining and handling will not be too large. If the bending amplitude is too large, it will be a scrap product or a bending correction process will be performed. For workpieces with a small bending amplitude, the swing amplitude of the swing block 33 does not need to be too large. The swing amplitude of the grinding wheel 21 is between 1mm and 15mm. Therefore, there is no need to consider the resonance problem caused by the elastic connection of the two ends of the swing block 33 to the support frame 31.

[0043] This invention utilizes a dual-grinding wheel balancing oscillation device to simultaneously process two workpieces with different feed rates (one workpiece is bent, the other is not bent; or both workpieces are bent, but to different degrees). This truly achieves high quality and high efficiency by processing two workpieces simultaneously, thereby improving work efficiency, saving energy, ensuring processing quality, and achieving the goal of energy conservation and emission reduction.

[0044] The frame 1 is also provided with a second driving device for driving the workpiece to approach or move away from the sanding belt 23 between the upper and lower grinding wheels 21. The purpose of the second driving device is to feed the workpiece from various directions (including the inclined direction). like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown: The specific structure of the two ends of the swing block 33 being elastically connected to the support frame 31 includes a connecting block 41 that connects the upper and lower end faces of the swing block 33 respectively, a through hole 42 provided on the connecting block 41, a pull rod 43 with one end fixed to the support frame 31 and the other end passing through and extending out of the through hole 42, an inner cap 44, a spring 45, an outer cap 46 and an adjusting nut 47 sequentially sleeved on the pull rod 43, the inner cap 44 abutting against the connecting block 41, the outer cap 46 abutting against the adjusting nut 47, and the two ends of the spring 45 abutting against the inner cap 44 and the outer cap 46 respectively.

[0045] The connecting block 41 is L-shaped to expand space and prevent positional interference. One end of the pull rod 43 is fixed to the support frame 31, and the other end passes through and extends out of the through hole 42. The diameter of the through hole 42 is smaller than the outer diameter of the inner cap 44, but it should not be too small to prevent interference with the pull rod 43 when it swings. Then, the inner cap 44, spring 45, outer cap 46 and adjusting nut 47 are sequentially fitted on the outside of the pull rod 43. The adjusting nut 47 is threaded to the end of the pull rod 43. Tighten the nut so that the inner cap 44 abuts against the connecting block 41 and the outer cap 46 abuts against the adjusting nut 47. The two ends of the spring 45 abut against the inner cap 44 and the outer cap 46 respectively. In the initial state, it is preferable that the two springs 45 are in a compressed state. In the actual production process, the "hardness" of the swing can be adjusted by rotating the adjusting nut 47 in the forward or reverse direction. The tighter the spring 45 is compressed, the "harder" the swing; the looser the spring 45 is compressed, the "softer" the swing.

[0046] Another advantage is that the "hardness" can be adjusted according to the degree of polishing (whether it is over-polished). The greater the compression deformation of spring 45, the tighter the adjusting nut 47 adjusts spring 45, that is, the "harder" the oscillation. The smaller the compression deformation of spring 45, the looser the adjusting nut 47 adjusts spring 45, that is, the "softer" the oscillation. If there is over-polishing, then adjust the oscillation to be "softer"; if the polishing is not thorough enough, then adjust the oscillation to be "harder".

[0047] The present invention can arrange the inner cap 44, spring 45, outer cap 46 and adjusting nut 47 between the connecting block 41 and the support frame 31. However, in this way, the operating space for the adjusting nut 47 to rotate is small, making it inconvenient to adjust.

[0048] like Figure 11 and Figure 14 As shown, when the feed rates of the two workpieces are the same, the oscillating block 33 does not wobble, and the two grinding wheels 21 do not move back and forth; as Figure 12 and Figure 15As shown, when the feed rate of the upper workpiece is high, the upper grinding wheel 21 is subjected to force and shifts backward, forcing the upper part of the swing block 33 to swing backward, and the upper spring 45 is pushed to both sides by its own elastic force; until the lower part of the swing block 33 swings forward, the lower grinding wheel 21 shifts forward and contacts the lower workpiece for polishing, while the lower spring 45 is further compressed; as Figure 13 and Figure 16 As shown, the top and bottom are reversed.

[0049] It is worth mentioning that during the operation of the equipment, the second drive device drives the workpiece to do work on the grinding wheel 21 corresponding to the sanding belt 23 in area a to overcome the elastic force of the spring 45. Even when the equipment stops, since the difference in the feed amount of the upper and lower workpieces is not large, the amplitude of the spring 45 is not large. In actual production, even if the two springs 45 resonate (the two springs 45 rebound), it will not affect the stability of the equipment (core components such as the tie rod 43, the central shaft 32, and the rotating shaft 35).

[0050] like Figure 9 and Figure 10 As shown, the fixing device includes a turntable 51, on which a crossbar 52 is fixed. The two ends of the crossbar 52 are respectively provided with a first bracket 53 and a second bracket 54. The first bracket 53 and the second bracket 54 are provided with at least two sets of clamping and rotating devices for loosening or clamping the workpiece and driving the workpiece to rotate. Preferably, the two sets of clamping and rotating devices are arranged vertically and parallel, that is, one above the other.

[0051] Specifically, the pressing and rotating device includes a first rotating shaft 61 provided on the first bracket 53 and a fourth driving device 62 for driving the first rotating shaft 61 to rotate, a sleeve 63 provided on the second bracket 54, a telescopic sleeve 64 located inside the sleeve and sliding relative to the sleeve 63, and a telescopic cylinder 65 fixed on the second bracket 54. The fourth drive device 62 is a servo motor, which is used to drive the first rotating shaft 61 to rotate, and then drive the first clamp 610 to rotate. The two sets of servo motors can be used to drive the upper and lower workpieces at the same speed or different speeds. The telescopic cylinder 65 is used to move the telescopic sleeve 64 left and right, thereby driving the second clamp 69 to move left and right.

[0052] The telescopic cylinder 65 is connected to one end of the telescopic sleeve 64 to drive the telescopic sleeve 64 to move within the housing 63, as shown in the figure. The other end of the telescopic sleeve 64 is rotatably connected to a second rotating shaft via a bearing. Specifically, a planar thrust bearing 66 and several deep groove ball bearings 67 are sequentially arranged inside the other end of the telescopic sleeve 64 from the inside out, and are limited by a snap ring 68. The second rotating shaft is interference-fitted with the inner ring of the deep groove ball bearing 67. Preferably, the outer rings of the planar thrust bearing 66 and the outer rings of the deep groove ball bearings 67 are interference-fitted with the inner wall of the other end of the telescopic sleeve 64. The second rotating shaft is connected to a second clamp 69; a first clamp 610 is provided at one end of the first rotating shaft 61. With the above design, when the two robotic arms grasp two workpieces between the first clamp 610 and the second clamp 69, and move them to the first clamp 610 at one end of the workpiece, the telescopic cylinder 65 drives the second clamp 69 on the telescopic sleeve 64 to move to the other end of the corresponding workpiece to tighten and limit it. The two robotic arms reset, and then the fourth drive device 62 drives the first rotating shaft 61 to rotate, thereby driving the first clamp 610, the workpiece and the second clamp 69 to rotate.

[0053] like Figure 1 and 2 As shown: The second driving device includes a second fixed plate 71, a first fixed plate 72 mounted on the frame 1, a first lead screw 73 fixed on the first fixed plate 72 by bearings, a first cylinder liner fixed on the second fixed plate 71 and cooperating with the first lead screw 73, and a fifth driving device 75 mounted on the frame 1 and driving the first lead screw 73 to rotate. The fifth driving device 75 is a motor. The first fixed plate 72 and the second fixed plate 71 are slidably engaged; thereby enabling the turntable 51 to move in the X-axis direction.

[0054] The second fixed plate 71 is provided with two guide posts 76 and a second lead screw 77 fixed by bearings. An outer sliding sleeve 78 is fitted over the guide posts 76, and the sliding sleeve 78 is slidably connected to the guide posts 76. The sliding sleeve 78 is fixed to the third fixed plate 79. The second fixed plate 71 is also provided with a sixth driving device 710 for driving the second lead screw 77 to rotate. The sixth driving device 710 is a motor. The second lead screw 77 is fitted with a second cylinder sleeve 711, and the second lead screw 77 is threadedly connected to the second cylinder sleeve 711. The second cylinder sleeve 711 is fixed to the fourth fixed plate 712. The fixed plate 712 is connected to two sliding sleeves 714 that are slidably connected to the two guide posts 76. The two sliding sleeves 714 are sleeved on the corresponding two guide posts 76 and slidably connected to the guide posts 76. It also includes a buffer spring 713. One end of the buffer spring 713 is fixed on the third fixed plate 79 and the other end is fixed on the fourth fixed plate 712. On the one hand, it enables the turntable 51 to move in the Y-axis direction. On the other hand, the buffer spring 713 plays a role in buffering and flexible polishing to prevent excessive wear. The turntable 51 is rotatably connected to the third fixed plate 79 through a bearing.

[0055] like Figure 1 and Figure 2 As shown, it also includes a swinging device, which includes a swinging cylinder 81. One end of the swinging cylinder 81 is connected to the frame 1, and the other end is connected to the crossbar 52. Driving the swinging cylinder 81 causes the turntable 51 to rotate relative to the third fixed plate 79, thereby realizing the inclined feeding of the workpiece. It is used to grind the arc surface of the wrench without the need for setting sanding belts 23 at multiple angles. The structure is simple and the cost is lower.

[0056] like Figure 2 As shown, it also includes a seventh drive device 91, which is a cylinder. The first drive device 24 is connected to a guide sleeve 92, and a guide rail 93 is fixed on the support frame 31. The guide sleeve 92 and the guide rail 93 are slidably connected. The first drive device 24 is slidably mounted on the support frame 31 through the guide sleeve 92 and the guide rail 93. One end of the seventh drive device 91 is connected to the guide sleeve 92, and the other end is connected to the support frame 31. When changing the sanding belt 23 or adjusting the tension of the sanding belt 23, the seventh drive device 91 is driven to move the first drive wheel 22 on the first drive device 24 back and forth.

[0057] like Figure 1 , Figure 3 , Figure 5 , Figures 11-16 As shown, the clamping and rotating device consists of two sets. The workpieces located between the first clamp 610 and the second clamp 69 in the upper and lower sets correspond one-to-one with the horizontal height of the center of the upper and lower grinding wheels 21.

[0058] With the above design, where the upper workpiece is at the same horizontal height as the center of the upper grinding wheel 21 and the lower workpiece is at the same horizontal height as the center of the lower grinding wheel 21, tests show that when the workpiece is applied to area a of the abrasive belt, the grinding wheel 21 acts as a support, resulting in better grinding effect. However, if the workpiece is applied to area b, there is nothing to support the abrasive belt 23, which is prone to deformation, leading to poor grinding effect.

[0059] Meanwhile, when the abrasive belt 23 is grinding in area b, it will deform indiscriminately. However, when grinding in area a, the abrasive belt 23 swings along with the abrasive wheel 21, allowing the abrasive belt 23 to grind and polish the workpiece under the optimal feed rate and feed pressure, thereby extending the service life of the abrasive belt 23 and effectively saving costs.

[0060] Example 2: This example is basically the same as Example 1, except that, as Figure 20 , Figure 21 and Figure 22 As shown: The pressing and rotating device includes a first rotating shaft 61 provided on the first support 53, a housing 63 provided on the second support 54, a telescopic sleeve 64 located inside the housing and sliding relative to the housing 63, and a telescopic cylinder 65 fixed on the second support 54; the telescopic cylinder 65 is connected to one end of the telescopic sleeve 64 to drive the telescopic sleeve 64 to move inside the housing 63, and the other end of the telescopic sleeve 64 is rotatably connected to the second rotating shaft through a bearing, and the second rotating shaft is connected to a second clamp 69; one end of the first rotating shaft 61 is provided with a first clamp 610, and the other end of the first rotating shaft 61 is provided with a second drive wheel 02; like Figure 20 As shown, this embodiment also includes a third drive device 06 fixed on the first bracket 53. The third drive device 06 is a motor. The third drive device drives each second drive wheel 02 to rotate through a belt 01 or a gear set.

[0061] In this embodiment, a belt 01 or a gear set is used to drive each second drive wheel 02 to rotate, so that the upper and lower workpieces rotate at the same speed and rotate synchronously. Apart from this, the effect of this embodiment is basically the same as that of embodiment 1.

[0062] like Figure 21 and Figure 22 As shown: This embodiment also includes a belt tensioning device, which includes an obtuse angle plate 03 with one end hinged in the first bracket 53, and a screw 04 abutting the other end. The screw 04 passes through from the outside and abuts against the obtuse angle plate 03. A pulley 05 is rotatably connected to the obtuse angle of the obtuse angle plate 03, and the pulley 05 abuts against the belt 01.

[0063] Tighten screw 04 to push pulley 05 against belt 01, thereby tightening belt 01.

[0064] Of course, the above are just typical examples of the present invention. In addition, the present invention may have many other specific embodiments. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. A multi-station, dual-wheel balanced oscillating grinding device, comprising a frame, a fixing device for fixing the workpiece and a grinding device for grinding the workpiece, characterized in that: It also includes a dual-grinding wheel balancing oscillating device; The grinding device includes two grinding wheels mounted on a frame, a first drive wheel, a sanding belt, and a first drive device slidably mounted on the frame and used to drive the first drive wheel to rotate. The sanding belt is sleeved on the first drive wheel and the two grinding wheels, and the two grinding wheels are arranged one above the other on the frame. The dual grinding wheel balancing oscillating device includes a support frame fixed on the machine frame and an oscillating block rotatably connected to the support frame via a central shaft. The two grinding wheels are respectively connected to the same side of the upper and lower ends of the oscillating block via two rotating shafts. The upper and lower ends of the oscillating block are elastically connected to the support frame so that the oscillating block can oscillate around the central shaft, thereby making the upper and lower grinding wheels oscillate synchronously back and forth, so that two workpieces with different feed rates can be processed at the same time. The frame is also equipped with a second drive device that drives the workpiece to move closer to or further away from the abrasive belt between the upper and lower abrasive wheels; The fixing device includes a turntable, on which a crossbar is fixed. The two ends of the crossbar are respectively provided with a first bracket and a second bracket. The first bracket and the second bracket are provided with two sets of clamping and rotating devices for loosening or clamping the workpiece and driving the workpiece to rotate. The two sets of clamping and rotating devices are arranged vertically and parallel. When the two workpieces are ground by the sanding belt, the grinding wheel is used as abutment.

2. The multi-station dual-wheel balanced oscillating grinding device according to claim 1, characterized in that: The specific structure of the two ends of the swing block being elastically connected to the support frame includes a connecting block that connects the upper and lower end faces of the swing block respectively, a through hole provided on the connecting block, a pull rod with one end fixed to the support frame and the other end passing through and extending out of the through hole, an inner cap, a spring, an outer cap and an adjusting nut sequentially sleeved on the pull rod, the inner cap abutting against the connecting block, the outer cap abutting against the adjusting nut, and the two ends of the spring abutting against the inner cap and the outer cap respectively.

3. The multi-station dual-wheel balanced oscillating grinding device according to claim 1, characterized in that: The pressing and rotating device includes a first rotating shaft provided on the first support, a housing provided on the second support, a telescopic sleeve located inside the housing and sliding relative to the housing, and a telescopic cylinder fixed on the second support. The telescopic cylinder is connected to one end of the telescopic sleeve to drive the telescopic sleeve to move inside the sleeve housing, and the other end of the telescopic sleeve is rotatably connected to the second rotating shaft through a bearing, and the second rotating shaft is connected to the second clamp. A first clamp is provided at one end of the first rotating shaft, and a second drive wheel is provided at the other end of the first rotating shaft; It also includes a third drive unit fixed on the first bracket, which drives each of the second drive wheels to rotate via a belt or gear set.

4. The multi-station dual-wheel balanced oscillating grinding device according to claim 1, characterized in that: The pressing and rotating device includes a first rotating shaft on the first support and a fourth driving device for driving the first rotating shaft to rotate, a housing on the second support, a telescopic sleeve located inside the housing and sliding relative to the housing, and a telescopic cylinder fixed on the second support. The telescopic cylinder is connected to one end of the telescopic sleeve to drive the telescopic sleeve to move inside the sleeve housing, and the other end of the telescopic sleeve is rotatably connected to the second rotating shaft through a bearing, and the second rotating shaft is connected to the second clamp. A first clamp is provided at one end of the first rotating shaft.

5. A multi-station dual-wheel balanced oscillating grinding device according to claim 1, characterized in that: The second driving device includes a second fixed plate, a first fixed plate mounted on the frame, a first lead screw fixed to the first fixed plate by a bearing, a first cylinder liner fixed to the second fixed plate and cooperating with the first lead screw, and a fifth driving device mounted on the frame and driving the first lead screw to rotate. The first fixed plate and the second fixed plate are slidably engaged. The second fixed plate is provided with two guide posts and a second lead screw fixed by bearings. The guide posts are fitted with outer sliding sleeves, which are fixed to the third fixed plate. The second fixed plate is also provided with a sixth driving device for driving the second lead screw to rotate. The second lead screw is fitted with a second cylinder sleeve, which is fixed to the fourth fixed plate. The fourth fixed plate is connected with two sliding sleeves that are slidably connected to the two guide posts. The two sliding sleeves are fitted over the corresponding two guide posts and are slidably connected to the guide posts. It also includes a buffer spring, one end of which is fixed to the third fixed plate and the other end of which is fixed to the fourth fixed plate. The turntable is rotatably connected to the third fixed plate.

6. The multi-station dual-wheel balanced oscillating grinding device according to claim 1, characterized in that: It also includes a rocking device, which includes a rocking cylinder, one end of which is connected to the frame and the other end of which is connected to a crossbar.

7. A multi-station dual-wheel balanced oscillating grinding device according to claim 3, characterized in that: It also includes a belt tensioning device, which includes an obtuse-angled plate hinged at one end to the first bracket, and a screw abutting at the other end. A pulley is rotatably connected to the obtuse angle of the obtuse-angled plate, and the pulley abuts against the belt.

8. A multi-station dual-wheel balanced oscillating grinding device according to claim 1, characterized in that: It also includes a seventh driving device. The first driving device is connected to a guide sleeve, and a guide rail is fixed on the support frame. The guide sleeve and the guide rail are slidably connected. The first driving device is slidably mounted on the support frame through the guide sleeve and the guide rail. One end of the seventh driving device is connected to the guide sleeve, and the other end is connected to the support frame.

9. A multi-station dual-wheel balanced oscillating grinding device according to claim 3 or 4, characterized in that: The clamping and rotating device consists of two sets, with the workpieces located between the first and second clamps corresponding one-to-one with the horizontal height of the centers of the upper and lower grinding wheels.

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