Split type clamp for double-end-face grinding equipment

Abstract

The split type clamp for the double-end-face grinding equipment comprises a supporting part, a clamp body and a driving mechanism, and the clamp body comprises a rotating ring, a clamp disc used for containing a workpiece and a transmission connecting piece; the rotating ring is rotationally connected into the assembling hole of the supporting part, and the clamp disc is in coaxial clearance fit with a ring cavity of the rotating ring; one end of the transmission connecting piece is movably and detachably connected with the rotating ring, and the other end of the transmission connecting piece is fixed with the clamp disc, so that the clamp disc has axial deflection; the driving mechanism is installed on the supporting part, and the driving end of the driving mechanism is in transmission connection with the rotating ring to drive the rotating ring to drive the clamp disc to rotate. According to the double-face end grinding clamp disc, the rotating ring used for transmission and the clamp disc used for fixing a workpiece are designed in a split mode, and the technical problem that a traditional double-face end grinding clamp disc is not suitable for the workpiece with the large height-diameter ratio and the large plane grinding allowance is solved.

Description

Technical Field

[0001] The invention relates to the field of grinding fixtures, and more particularly to a split fixture for double-end surface grinding equipment. Background Art

[0002] The double-end surface grinder is a high-efficiency plane processing machine tool, which is mainly composed of upper and lower grinding wheels, feed plates, fixture plates, etc. It can grind two parallel end surfaces at the same time in one processing process with high processing efficiency. Therefore, it is widely used in surface grinding processing industries such as bearings and sleeves.

[0003] However, in the actual processing process, since the workpiece is subjected to the grinding force of the upper and lower grinding wheel end faces in the fixture disk, and the upper and lower grinding wheels rotate in opposite directions, the corresponding grinding forces are opposite. When the conventional clamping method is used to process workpieces with a large aspect ratio, the overturning moment of the workpiece in the fixture disk is greater. After grinding, the inclination variation of the generatrix of the inner and outer diameter surfaces of the workpiece to the end face of the workpiece is often too large, that is, the verticality of the workpiece after plane processing exceeds the process range, which will make it difficult to ensure the processing accuracy of the workpiece in the subsequent processing, reduce the processing qualification rate, reduce production efficiency, and seriously restrict large-scale industrial applications.

[0004] The existing double-end face grinder feed plate structure is only optimized and improved for the service life of the feed plate, the service life of the fixture plate, and the height and size range of the workpiece to be processed. It pays little attention to whether the size and shape of the workpiece after processing meet the requirements. Especially for workpieces with large aspect ratios and large surface grinding allowances such as carbide bearings and sleeves, the verticality deviation after processing will seriously affect subsequent production and fail to play the advantage of high efficiency of double-end face processing. At the same time, the existing double-end face fixture discs are all made in an integral manner, with large size and high precision, and their processing and manufacturing costs are also correspondingly high, and it is not convenient and quick to replace the fixture disc.

[0005] Therefore, how to provide a new split fixture disc for double-end surface grinding equipment, which is suitable for grinding parts with a large aspect ratio and can also reduce the use cost of the fixture disc is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0006] In view of this, the present invention provides a split fixture for double-end surface grinding equipment, aiming to solve the technical problem that the above-mentioned traditional double-sided end grinding fixture disc is not suitable for workpieces with a large aspect ratio and a large surface grinding allowance.

[0007] A split fixture for a double-end surface grinding device, wherein the double-end surface grinding device has an upper grinding wheel disc and a lower grinding wheel disc that are arranged oppositely and horizontally; comprising:

[0008] The clamp body comprises a support part, a rotating ring, a fixture disc for placing a workpiece, and a transmission connection piece; the support part is provided with an assembly hole at one end corresponding to the upper grinding wheel disc and the lower grinding wheel disc; the rotating ring is rotatably connected in the assembly hole, and the clamp disc and the ring cavity of the rotating ring are coaxially gap-matched; the transmission connection piece is located in the gap, and one end of the transmission connection piece is movable and detachably connected to the rotating ring, and the other end is fixed to the clamp disc, so that the clamp disc has an axial deflection amount;

[0009] The driving mechanism is installed on the supporting part and its driving end is transmission-connected with the rotating ring to drive the rotating ring to drive the clamping disk to rotate.

[0010] Through the above technical scheme, the present invention drives the rotating ring to rotate through the servo motor, and then drives the clamp disk to rotate through the transmission connecting part. When the processed workpiece is subjected to opposite grinding forces from the upper and lower grinding wheels, it rotates in the clamp disk and makes circular motion with the clamp disk. Since the outer wall surface of the clamp disk is matched with the annular cavity gap of the rotating ring, the lower disk surface of the clamp disk is always in contact with the upper grinding surface of the lower grinding wheel during the rotation of the rotating ring, and is not affected by the deflection of the axis during the rotation of the rotating ring, so that the workpiece fixed in the clamp disk always maintains a vertical state. Therefore, during the grinding process of the workpiece, the force and removal of the end faces at both ends are more uniform. Moreover, compared with the integral clamp disk, the clamp disk in which the rotating ring and the clamp disk are separately arranged needs to ensure that the area of ​​the high-precision area is smaller, which reduces the manufacturing cost of the clamp disk. It is suitable for workpieces with a large aspect ratio and a large surface grinding allowance and has the characteristics of low manufacturing cost.

[0011] Preferably, the inner ring surface of the rotating ring is provided with a movable groove, and the outer ring surface of the rotating ring has teeth; the transmission connecting member is a transmission connecting block, which is tightly connected to the outer ring surface of the clamping disk and is movable and transmission-connected with the movable groove.

[0012] The driving mechanism includes a workbench, which is located on one side of the double-end surface grinding device;

[0013] A servo motor, wherein the fixed end of the servo motor is tightly connected to the workbench, and the power output end of the servo motor is tightly connected to a gear plate that meshes with the teeth for transmission.

[0014] Preferably, a plurality of positioning holes are evenly arranged on the fixture plate.

[0015] Preferably, the upper and lower disk surfaces of the clamping disk are both provided with a plurality of chip removal grooves radiating from the center position of the disk surface to the surrounding areas.

[0016] Preferably, a single chip removal groove is in an arc shape.

[0017] Preferably, it also includes a support ring, which is coaxially arranged with the assembly hole, the upper surface of the support ring is fastened to the lower surface of the support part, the bottom end of the rotating ring is fastened to a coaxially arranged limiting ring, and the outer ring surface of the limiting ring is rotatably connected to the inner ring surface of the support ring.

[0018] Preferably, the maximum outer contour of the rotating ring teeth is clearance-matched with the assembly hole.

[0019] Preferably, the number of the movable grooves is three, which are evenly arranged along the circumference of the rotating ring, and the number of the transmission connecting blocks is three, which are evenly arranged along the circumference of the clamping disk and are all tightly connected to the outer ring surface of the clamping disk.

[0020] Preferably, the upper and lower disc surfaces of the fixture disc are both located within the grinding range of the upper grinding wheel disc and the lower grinding wheel disc.

[0021] Preferably, it also includes a transmission wheel, which is rotatably connected to the table top of the workbench, and the gear plate to which the power output end of the servo motor is fastened is connected to the teeth of the rotating ring through the transmission wheel.

[0022] It can be seen from the above technical solution that, compared with the prior art, the present invention discloses a split fixture for double-end surface grinding equipment, which has the following beneficial effects: the fixture disk and the rotating ring are coaxially matched with each other, and even if the rotating ring undergoes some axial overturning during rotation, the displacement caused by the overturning will be absorbed by the gap between the two, thereby not affecting the horizontal rotation of the fixture disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional schematic diagram of a split fixture for a double-end surface grinding device provided by the present invention;

[0024] Figure 2 A three-dimensional schematic diagram of a split fixture for double-end surface grinding equipment provided by the present invention (after removing the upper grinding disc);

[0025] Figure 3 for Figure 2 A partial enlarged view of point A;

[0026] Figure 4 A top view of a split fixture for double-end surface grinding equipment provided by the present invention (after removing the upper grinding disc);

[0027] Figure 5 for Figure 4 BB cross-sectional view;

[0028] Figure 6 for Figure 5 A partial enlarged view of point C;

[0029] Figure 7 An exploded schematic diagram of a clamping body provided by the present invention;

[0030] Figure 8 A three-dimensional schematic diagram of a support portion provided by the present invention;

[0031] Fig. 9 A three-dimensional schematic diagram of a rotating ring provided by the present invention;

[0032] Fig.10 A three-dimensional schematic diagram of the clamping plate provided by the present invention.

[0033] Among them: 1- double-end surface grinding equipment; 2- workbench; 3- clamping base; 4- servo motor; 6- transmission wheel; 11- upper grinding wheel; 12- lower grinding wheel; 31- support part; 32- rotating ring; 33- fixture disk; 34- support ring; 311- assembly hole; 321- movable groove; 322- limiting ring; 331- transmission connecting block; 332- positioning hole; 333- chip removal groove. DETAILED DESCRIPTION

[0034] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0035] See attached Figure 1-10 The embodiment of the present invention discloses a split fixture for a double-end surface grinding device. The double-end surface grinding device 1 has an upper grinding wheel disc 11 and a lower grinding wheel disc 12 that are arranged oppositely and horizontally; it includes: a fixture body 3 and a driving mechanism;

[0036] The clamp body 3 includes a support portion 31, a rotating ring 32, a clamping disc 33 for placing a workpiece, and a transmission connection member; the support portion 31 is provided with an assembly hole 311 at one end corresponding to the upper grinding wheel disc 11 and the lower grinding wheel disc 12; the rotating ring 32 is rotatably connected in the assembly hole 311, and the clamping disc 33 and the annular cavity of the rotating ring 32 are coaxially gap-matched; the transmission connection member is located in the gap and one end is movable and detachably connected to the rotating ring 32, and the other end is fixed to the clamping disc 33, so that the clamping disc 33 has an axial deflection amount;

[0037] The driving mechanism is installed on the supporting portion 31 and the driving end thereof is transmission-connected with the rotating ring 32 to drive the rotating ring 32 to drive the clamping plate 33 to rotate.

[0038] In some embodiments, the inner ring surface of the rotating ring 32 is provided with a movable groove 321, and the outer ring surface of the rotating ring 32 has teeth; the transmission connecting member is a transmission connecting block 331, and the transmission connecting block 331 is tightly connected to the outer ring surface of the clamp plate 33 and is movable and transmission-connected with the movable groove 321.

[0039] The driving mechanism includes a workbench 2, which is located on one side of the double-end surface grinding device 1;

[0040] A servo motor 4, wherein a fixed end of the servo motor 4 is tightly connected to the workbench 2, and a power output end of the servo motor 4 is tightly connected to a gear plate that meshes with the teeth for transmission.

[0041] In some other embodiments, a plurality of positioning holes 332 are evenly formed on the fixture plate 33 .

[0042] Specifically, the gap between the workpiece to be ground and the positioning hole 332 is generally between 0.15 mm and 0.25 mm.

[0043] More specifically, the thickness of the fixture plate 33 is greater than the distance between the bottom end of the rotating ring 32 and the lower grinding wheel disc 12. Thus, the transmission connecting block 331 of the fixture plate 33 is prevented from being separated from the movable groove 321.

[0044] In one embodiment, the upper and lower surfaces of the fixture plate 33 are provided with a plurality of chip discharge grooves 333 radiating from the center of the plate surface to the surrounding areas. This facilitates the discharge of grinding fluid and grinding particles, and prevents the grinding products from settling and accumulating in the positioning holes, which is beneficial to the grinding processing accuracy of the product.

[0045] In one embodiment, the single chip discharge groove 333 is in an arc shape, so that the grinding products can be discharged quickly along the direction of rotation of the clamping disc 33 during its rotation.

[0046] In some embodiments, a support ring 34 is further included, the support ring 34 is coaxially arranged with the assembly hole 311, the upper surface of the support ring 34 is fastened to the lower surface of the support portion 31, the bottom end of the rotating ring 32 is fastened to a coaxially arranged limiting ring 322, and the outer ring surface of the limiting ring 322 is rotatably connected to the inner ring surface of the support ring 34. Thus, the rotation of the rotating ring 32 is limited by the support ring 35.

[0047] In this embodiment, the maximum outer contour of the teeth of the rotating ring 32 is clearance-matched with the assembly hole 311 .

[0048] Specifically, the gap between the maximum outer contour of the teeth of the rotating ring 32 and the inner wall of the assembly hole 311 is between 1-2 mm.

[0049] Thus, the teeth of the rotating ring 32 are prevented from interfering with the inner wall of the assembly hole 311 .

[0050] In some specific embodiments, the number of movable grooves 321 is three, which are evenly arranged along the circumference of the rotating ring 32 , and the number of transmission connecting blocks 331 is three, which are evenly arranged along the circumference of the clamping disk 33 and are all tightly connected to the outer ring surface of the clamping disk 33 .

[0051] In some other specific embodiments, the upper and lower disc surfaces of the clamp disc 33 are both located within the grinding range of the upper grinding wheel disc 11 and the lower grinding wheel disc 12 .

[0052] In some other specific embodiments, a transmission wheel 6 is further included, which is rotatably connected to the table surface of the workbench 2 , and a gear plate fixedly connected to the power output end of the servo motor 4 is transmission-connected to the teeth of the rotating ring 32 via the transmission wheel 6 .

[0053] Specifically, in the process of manufacturing the clamp body 3, we can use the worn and scrapped clamp disc body, adopt the electric spark wire cutting processing method, and process the rotating ring 32 and the clamp disc 33 at the same time according to the given dimensions in the drawing, and require the gap between the rotating ring 32 and the clamp disc 33 to be between 0.25mm-0.35mm. Alternatively, it can be manufactured according to the size of the clamp disc 33. The manufacturing method is to first use the wire cutting technology to process the outer dimensions of the clamp disc 33 on a plate of specified thickness, including the transmission connecting block 331; then, multiple positioning holes 332 on the clamp disc 33 can be machined by milling, and the number of positioning holes 332 is set according to the size of the product; finally, milling is used to machine the cutting grooves 333 on the upper and lower surfaces of the positioning holes 332.

[0054] The manufacturing of the clamp plate 33 of the present invention belongs to the recycling of scrapped integral clamp plate bodies, which is conducive to the reuse of resources.

[0055] Production of rotating ring 32: The rotating ring 32 is processed according to the dimensions of the drawing. The outer disk gear of the fixture is first processed by milling, and then the inner hole is processed by wire cutting, and a corresponding movable groove 321 is left to cooperate with the fixture disk 33. In order to increase the service life of the rotating ring 32, the rotating ring 32 also needs to be subjected to corresponding heat treatment to improve its hardness and wear resistance.

[0056] When changing the model of the processed product, the split clamp disclosed in the present invention only needs to replace the clamp plate 33, and does not need to disassemble the rotating ring 32. The operation is simple, the efficiency of the model change is improved, and the labor intensity of the personnel is reduced.

[0057] The specific principle and use method of a split fixture for double-end surface grinding equipment provided in this embodiment are as follows:

[0058] During the grinding process of the product, due to the coaxial clearance fit between the clamp disk 33 and the rotating ring 32, even if the rotating ring 32 has some axial overturning during the rotation process, the displacement caused by the overturning will be absorbed by the gap between the two. Therefore, during the rotation of the rotating ring 32, the lower disk surface of the clamp disk 33 is always in contact with the upper grinding surface of the lower grinding wheel disk 12, and is not affected by the deflection of the axis during the rotation of the rotating ring 32, so that the workpiece fixed in the clamp disk 33 always remains in a vertical state. Therefore, during the grinding process of the workpiece, the force and removal of the end faces at both ends are more uniform.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A split fixture for a double-end surface grinding device, wherein the double-end surface grinding device (1) has an upper grinding wheel (11) and a lower grinding wheel (12) arranged oppositely and horizontally; characterized in that: include: A clamp body (3), the clamp body (3) comprising a support portion (31), a rotating ring (32), a fixture disk (33) for placing a workpiece, and a transmission connection member; the support portion (31) is provided with an assembly hole (311) at one end corresponding to between the upper grinding wheel disk (11) and the lower grinding wheel disk (12); the rotating ring (32) is rotatably connected in the assembly hole (311), and the fixture disk (33) and the annular cavity of the rotating ring (32) are coaxially gap-matched; the transmission connection member is located in the gap, and one end of the fixture disk (33) is movably and detachably connected to the rotating ring (32), and the other end is fixed to the fixture disk (33), so that the fixture disk (33) has an axial deflection amount; A driving mechanism is installed on the supporting portion (31) and a driving end of the driving mechanism is transmission-connected to the rotating ring (32) so as to drive the rotating ring (32) to drive the clamping plate (33) to rotate.

2. A split fixture for double-end surface grinding equipment according to claim 1, characterized in that: The inner ring surface of the rotating ring (32) is provided with a movable groove (321), and the outer ring surface of the rotating ring (32) has teeth; the transmission connecting member is a transmission connecting block (331), and the transmission connecting block (331) is tightly connected to the outer ring surface of the clamping plate (33) and is movably and transmission-connected to the movable groove (321); The driving mechanism comprises a workbench (2), and the workbench (2) is located on one side of the double-end surface grinding device (1); A servo motor (4), wherein the fixed end of the servo motor (4) is tightly connected to the workbench (2), and the power output end of the servo motor (4) is tightly connected to a gear plate that meshes with the teeth for transmission.

3. A split fixture for double-end surface grinding equipment according to claim 1, characterized in that: The clamp plate (33) is evenly provided with a plurality of positioning holes (332).

4. A split fixture for double-end surface grinding equipment according to claim 1, characterized in that: The upper and lower disk surfaces of the clamp disk (33) are both provided with a plurality of chip removal grooves (333) radiating from the center of the disk surface to the surrounding areas.

5. A split fixture for double-end surface grinding equipment according to claim 4, characterized in that: A single chip removal groove (333) is in an arc shape.

6. A split fixture for double-end surface grinding equipment according to claim 1, characterized in that: It also includes a support ring (34), which is coaxially arranged with the assembly hole (311), the upper surface of the support ring (34) is tightly connected to the lower surface of the support portion (31), and the bottom end of the rotating ring (32) is tightly connected with a coaxially arranged limiting ring (322), and the outer ring surface of the limiting ring (322) is rotatably connected to the inner ring surface of the support ring (34).

7. A split fixture for double-end surface grinding equipment according to claim 1, characterized in that: The maximum outer contour of the teeth of the rotating ring (32) is clearance-matched with the assembly hole (311).

8. The split fixture for double-end surface grinding equipment according to claim 2, characterized in that: The number of the movable grooves (321) is three, which are evenly arranged along the circumference of the rotating ring (32); the number of the transmission connection blocks (331) is three, which are evenly arranged along the circumference of the clamping plate (33) and are all tightly connected to the outer ring surface of the clamping plate (33).

9. The split fixture for double-end surface grinding equipment according to claim 1, characterized in that: The upper and lower disc surfaces of the clamp disc (33) are both located within the grinding range of the upper grinding wheel disc (11) and the lower grinding wheel disc (12).

10. The split fixture for double-end surface grinding equipment according to claim 2, characterized in that: It also includes a transmission wheel (6), which is rotatably connected to the table surface of the workbench (2), and a gear plate fixedly connected to the power output end of the servo motor (4) is connected to the teeth of the rotating ring (32) through the transmission wheel (6).

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