Cone shaft body edge grinding clamp

Abstract

The utility model discloses a cone shaft body edging clamp which comprises a clamp body, the clamp body comprises a positioning end and a clamping end, the clamping end comprises a positioning groove used for positioning the clamp, the positioning groove comprises a groove bottom, a first groove wall and a second groove wall, the first groove wall is provided with a positioning step, and the second groove wall is provided with a positioning hole. A positioning hole is formed in the first groove wall, a positioning pin capable of being adjusted in the axis direction of the positioning hole is coaxially arranged in the positioning hole, a limiting screw hole is further formed in the second groove wall, a limiting bolt is arranged in the limiting screw hole, a positioning block is further detachably arranged between the positioning step and the positioning pin, and a limiting groove is formed in the side, close to the first groove wall, of the positioning block. And the other side of the positioning block is in clearance fit with the positioning pin. According to the scheme, the two end faces of the product do not need to be punched, on one hand, the machining precision of the product is guaranteed, on the other hand, subsequent machining procedures are reduced, and machining efficiency and machining precision are improved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical processing, in particular to a tapered shaft edge grinding fixture. Background Art

[0002] In existing mechanical processing, for grinding and polishing the end face of a tapered shaft or a cylinder, as shown in the utility model patent with the authorization announcement number CN214135300U, it is only necessary to position one end of the tapered shaft or cylinder by a fixture and set a grinding device at the other end to complete the grinding of the product end face. However, when grinding the outer peripheral surface of the tapered shaft or cylinder, the product is required to rotate during the grinding process, so it is necessary to limit the two ends of the product.

[0003] The existing conical shaft edge grinding fixture usually needs to pre-process the process center hole on the two end faces of the product due to the single fixture structure. When fixing and clamping the conical shaft, a bearing is set in the process center hole, and the bearings at both ends are set on the fixture. During the edge grinding process, a guide wheel is set on one side of the product and a grinding wheel is set on the other side. The product is driven to rotate by the guide wheel, and the outer peripheral surface of the product is grinded by the grinding wheel. This ensures that the product does not shift during the grinding process. However, this processing method will leave the process center hole on the two end faces of the conical shaft after grinding. This requires further processing to remove the process center hole, which not only increases the processing and manufacturing cost, but also reduces the processing efficiency. At the same time, the method of further grinding the two ends of the product will also reduce the product height and affect the processing accuracy of the product. In addition, the above clamping method is only applicable to products with cones or cylinders at both ends. For conical products, one end cannot be punched for positioning. Utility Model Content

[0004] Therefore, in order to solve the above problems, the utility model provides a tapered shaft edge grinding fixture.

[0005] The utility model is realized by the following technical solutions:

[0006] A conical shaft grinding fixture comprises a fixture body, the fixture body comprises a positioning end and a clamping end, the clamping end comprises a positioning groove for positioning the fixture, the positioning groove is U-shaped, comprises a groove bottom for limiting the radial position of a product and a first groove wall and a second groove wall vertically arranged on both sides of the groove bottom, the groove bottom is a plane, a positioning step is vertically arranged on the inner side surface of the first groove wall, the side of the positioning step opposite to the second groove wall is a plane, a positioning hole coaxial with the positioning step is arranged on the second groove wall, the positioning hole is cylindrical, and is located inside and outside the second groove wall. A side opening is provided, and a positioning pin is coaxially arranged in the positioning hole, and the positioning pin can be adjusted along its axial direction. A limiting screw hole is also provided in the second groove wall, and the limiting screw hole is communicated with the positioning hole and the axis of the limiting screw hole is perpendicular to the axis of the positioning hole. A limiting bolt is provided in the limiting screw hole, and a positioning block is detachably provided between the positioning step and the positioning pin. The positioning block is provided with a limiting groove on a side close to the first groove wall, and the positioning block and the limiting groove in the positioning block are coaxial with the positioning step, and the other side of the positioning block is clearance-matched with the positioning pin.

[0007] Preferably, the gap distance between the positioning block and the positioning pin is 0.03mm-0.1mm.

[0008] Preferably, the positioning pin includes a shaft portion and a head portion coaxially arranged at one end of the shaft portion, the diameter of the head portion is larger than the diameter of the shaft portion, and the diameter of the shaft portion is the same as the diameter of the positioning hole.

[0009] Preferably, the head of the positioning pin is arranged at one end thereof close to the positioning step, and the head is clearance-matched with the positioning block.

[0010] Preferably, the limiting groove is a conical groove, and an opening is provided at the end of the conical groove with a larger diameter, and the opening is provided on a side surface of the positioning block close to the first groove wall.

[0011] Preferably, an internal thread is provided in the hole wall of the limiting screw hole, an external thread matching the internal thread is provided on the stud of the limiting bolt, and a height of the stud of the limiting bolt is greater than a height of the limiting screw hole.

[0012] Preferably, the axis of the limiting screw hole passes through half of the length of the positioning hole.

[0013] Preferably, the positioning step and the positioning block are both cylindrical, and the width of the positioning groove is greater than the diameters of the positioning step, the positioning block and the positioning pin head.

[0014] Preferably, the axes of the positioning step and the positioning hole are located at half the height of the positioning groove.

[0015] Preferably, the positioning end of the clamp body is located at the bottom of the clamping end, and a plurality of positioning screw holes are provided at the bottom of the positioning end of the clamp body.

[0016] The beneficial effects of the technical solution of the utility model are mainly reflected in:

[0017] 1. The bottom of the positioning groove of the tapered shaft edge grinding fixture is a plane, which can be used to radially position the product. The first groove wall and the second groove wall of the positioning groove are respectively provided with positioning mechanisms for positioning the end faces of the product at both ends. The clearances between the positioning step and the product, between the positioning pin and the positioning block, and between the positioning block and the product are matched. During the edge grinding process, the product is axially positioned while ensuring that the product can rotate, thereby achieving grinding of the outer peripheral surface of the product without drilling holes on the two end faces of the product. On the one hand, it ensures the precision of product processing, and on the other hand, it reduces subsequent processing steps and improves processing efficiency.

[0018] 2. A positioning block is provided between the positioning step and the positioning pin, and a limiting groove is provided in the positioning block, wherein the shape and diameter of the limiting groove can be adjusted as needed, so that it can adapt to cylindrical, cone or frustum products of different diameters and shapes, thereby improving the adaptability range of the fixture and the flexibility of the use of the fixture. At the same time, the limiting groove can be used to locate the tip of the conical product without damaging the product.

[0019] 3. A positioning hole is set on the second groove wall, and a positioning pin is adjustably set in the positioning hole. The positioning pin is limited by a limiting bolt. By adjusting the position of the positioning pin, the clamping space of the fixture can be adjusted to be suitable for products of different heights. In addition, it is also convenient to accurately adjust the gaps between the positioning mechanisms and between the positioning mechanisms and the products. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the fixture body in the tapered shaft edge grinding fixture;

[0021] Figure 2 It is a cross-sectional view of the positioning pin, the limit bolt and the positioning block in the tapered shaft edge grinding fixture;

[0022] Figure 3 This is a schematic diagram of the clamping state of the tapered shaft edge grinding fixture;

[0023] Figure 4 It is a schematic diagram of the positional relationship between the tapered shaft edge grinding fixture and the product, edge grinding machine, guide wheel and grinding wheel. DETAILED DESCRIPTION

[0024] In order to make the purpose, advantages and features of the utility model more clearly and in detail, the following preferred embodiments are illustrated and explained through non-limiting descriptions. This embodiment is only a typical example of the application of the technical solution of the utility model. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the utility model.

[0025] At the same time, it is stated that in the description of the scheme, it should be noted that the directions or positional relationships indicated by the terms "center", "up", "down", "left", "right", "front", "back", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0026] In addition, the terms "first" and "second" in this solution are only used for descriptive purposes and cannot be understood as indicating or implying the order of importance, or implicitly indicating the number of technical features shown. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In this utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] The utility model discloses a conical shaft edge grinding fixture, such as Figure 1-Figure 3 As shown, it includes a fixture body, and the fixture body includes a positioning end and a clamping end. The clamping end includes a positioning groove for positioning the fixture. The positioning groove is U-shaped, including a groove bottom 4 for limiting the radial position of the product 14 and a first groove wall 2 and a second groove wall 3 vertically arranged on both sides of the groove bottom 4. The groove bottom 4 is a plane, and a positioning step 1 is vertically arranged on the inner side surface of the first groove wall 2. The side of the positioning step 1 opposite to the second groove wall 3 is a plane, and the plane is used to position one of the end surfaces of the product 14. The second groove wall 3 is provided with a positioning hole 11 coaxial with the positioning step 1. The positioning hole 11 is cylindrical and opens on the inner and outer sides of the second groove wall 3. A locating pin 7 is coaxially arranged in the locating hole 11, and the locating pin 7 can be adjusted along its axial direction. By adjusting the axial position of the locating pin 7, the distance between each locating mechanism and the product 14 can be adjusted to complete the clamping and loosening of the fixture on the product 14. It is also used to match products 14 of different heights. A limiting screw hole 8 is also arranged in the second groove wall 3. The limiting screw hole 8 is communicated with the locating hole 11 and the axis of the limiting screw hole 8 is perpendicular to the axis of the locating hole 11. A limiting bolt 9 is arranged in the limiting screw hole 8, and the locating pin 7 is positioned by the limiting bolt 9. When the locating pin 7 is adjusted, the limiting bolt 9 is tightened and abutted against the outer peripheral surface of the locating pin 7, thereby ensuring that the locating pin 7 does not move.

[0028] like Figure 2 , Figure 3 As shown, a positioning block 5 is detachably provided between the positioning step 1 and the positioning pin 7. The positioning block 5 is provided with a limiting groove 6 on one side close to the first groove wall 2. The limiting groove 6 is used to position the end of the product 14. The positioning block 5 and the limiting groove 6 in the positioning block 5 are coaxial with the positioning step 1, and the other side of the positioning block 5 is clearance-matched with the positioning pin 7, so that the positioning block 5 can rotate with the product while ensuring stability, thereby avoiding the positioning pin 7 from interfering with the rotation of the product. In some embodiments, the gap distance between the positioning block 5 and the positioning pin 7 is 0.03mm-0.1mm, and the gap between the positioning step 1 and the product 14 is equivalent to the gap distance between the positioning block 5 and the positioning pin 7. Within this gap distance range, the stability of the axial positioning of the product 14 can be guaranteed, and interference with the rotation of the product 14 can be avoided. The two end faces of the product are axially positioned by each positioning mechanism, and then radially positioned by the groove bottom 4 of the positioning groove, thereby achieving three-sided positioning of the product 14 and ensuring the stability of the product 14 during rotation.

[0029] During the clamping process, one end of the product 14 is first matched with the limiting groove 6 in the positioning block 5, and the product 14 is placed in the positioning groove, the end face of the other end is matched with the positioning step 1, and the side of the product 14 is in contact with the bottom 4 of the positioning groove, and then the position of the positioning pin 7 is adjusted until the product 14 is positioned and a suitable gap is retained between the positioning step 1 and the product 14 and between the positioning block 5 and the positioning pin 7, and then the limiting bolt 9 is tightened to complete the clamping and positioning of the product 14.

[0030] like Figure 2 , Figure 3 As shown, in some embodiments, the locating pin 7 includes a shaft portion 701 and a head portion 702 coaxially arranged at one end of the shaft portion 701, the diameter of the head portion 702 is larger than the diameter of the shaft portion 701, and the diameter of the shaft portion 701 is the same as the diameter of the locating hole 11, further preventing the locating pin 7 from loosening during the grinding process of the product 14, the head portion 702 of the locating pin 7 is arranged at one end thereof close to the locating step 1, and the head portion 702 is clearance-fitted with the locating block 5, and since the head portion 702 of the locating pin 7 has a larger diameter, when the diameter of the product 14 is slightly reduced during the grinding process, the downward movement of the center of gravity of the product 14 will not affect the clearance fit between the locating block 5 and the locating pin 7, and similarly, when the product 14 is a tapered shaft, cone or frustum, the locating step 1 is in contact with the end of the product 14 with a larger diameter, and when the center of gravity of the product 14 moves downward, it will not affect the clearance fit between the locating step 1 and the end face of the product 14.

[0031] like Figure 3As shown, in some embodiments, the limiting groove 6 is a conical groove, and an opening is provided at the end with a larger diameter of the conical groove. The opening is provided on a side surface of the positioning block 5 close to the first groove wall 2, and the opening is arranged opposite to the positioning step 1.

[0032] like Figure 2 , Figure 3 As shown, in some embodiments, an internal thread 10 is provided in the hole wall of the limiting screw hole 8, and an external thread 12 matching the internal thread 10 is provided on the stud of the limiting bolt 9. The height of the stud of the limiting bolt 9 is greater than the height of the limiting screw hole 8, which facilitates the stud of the limiting bolt 9 to extend into the positioning hole 11 and abut against the positioning pin 7 in the positioning hole 11. In a preferred embodiment, the axis of the limiting screw hole 8 passes through half of the length of the positioning hole 11, further ensuring the stability of the limiting bolt 9 in the second groove wall 3.

[0033] Among them, Figure 1 As shown, the positioning end of the clamp body is located at the bottom of the clamping end, and a plurality of positioning screw holes 13 are provided at the bottom of the positioning end of the clamp body. During assembly, the positioning screw holes 13 are matched with the bolts on the edge grinder 15 by using an inner hexagonal wrench to fix the clamp body on the edge grinder 15. Figure 4 As shown, at this time, a guide wheel 16 is provided on one side of the clamp body, and a grinding wheel 17 is provided on the other side. The guide wheel 16 contacts the portion of the outer periphery of the product 14 exposed outside the positioning groove, and drives the product 14 on the clamp to rotate. The grinding wheel 17 on the other side also contacts the portion of the outer periphery of the product 14 exposed outside the positioning groove, and evenly grinds the outer peripheral surface of the product 14 during the rotation process.

[0034] In some embodiments, the positioning step 1 and the positioning block 5 are both cylindrical. When the product 14 is ground, the portion of the product 14 exposed outside the positioning groove is ground by the grinding wheel 17. Therefore, the width of the positioning groove is larger than the diameter of the positioning step 1, the positioning block 5 and the head 702 of the positioning pin 7, so as to avoid interference between the positioning mechanisms such as the positioning step 1, the positioning block 5 and the positioning pin 7 and the grinding wheel 17 or the guide wheel 16. In a preferred embodiment, the axis of the positioning step 1 and the positioning hole 11 is preferably located at half the height of the positioning groove.

[0035] There are many implementation methods of the utility model, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the utility model.

Claims

1. A conical shaft edge grinding fixture, comprising a fixture body, wherein the fixture body comprises a positioning end and a clamping end, and is characterized in that: The clamping end includes a positioning groove for a positioning fixture, the positioning groove is U-shaped, including a groove bottom for limiting the radial position of the product and a first groove wall and a second groove wall vertically arranged on both sides of the groove bottom, the groove bottom is a plane, a positioning step is vertically arranged on the inner side surface of the first groove wall, the side of the positioning step opposite to the second groove wall is a plane, a positioning hole coaxial with the positioning step is arranged on the second groove wall, the positioning hole is cylindrical and opens on the inner and outer sides of the second groove wall, a positioning pin is coaxially arranged in the positioning hole, and the positioning pin can be adjusted along its axial direction, a limiting screw hole is also arranged in the second groove wall, the limiting screw hole is communicated with the positioning hole and the axis of the limiting screw hole is perpendicular to the axis of the positioning hole, a limiting bolt is arranged in the limiting screw hole, a positioning block is also detachably arranged between the positioning step and the positioning pin, the positioning block is provided with a limiting groove on the side close to the first groove wall, the positioning block and the limiting groove in the positioning block are coaxial with the positioning step, and the other side of the positioning block is clearance-matched with the positioning pin.

2. The tapered shaft edge grinding fixture according to claim 1, characterized in that: The gap distance between the positioning block and the positioning pin is 0.03mm-0.1mm.

3. The tapered shaft edge grinding fixture according to claim 2, characterized in that: The positioning pin includes a shaft portion and a head portion coaxially arranged at one end of the shaft portion, the diameter of the head portion is larger than the diameter of the shaft portion, and the diameter of the shaft portion is the same as the diameter of the positioning hole.

4. The tapered shaft edge grinding fixture according to claim 3, characterized in that: The head of the positioning pin is arranged at one end thereof close to the positioning step, and the head is clearance-matched with the positioning block.

5. The tapered shaft edge grinding fixture according to claim 1, characterized in that: The limiting groove is a conical groove, and an opening is arranged at one end of the conical groove with a larger diameter, and the opening is arranged on a side surface of the positioning block close to the first groove wall.

6. The tapered shaft edge grinding fixture according to claim 1, characterized in that: An internal thread is arranged in the hole wall of the limiting screw hole, an external thread matching the internal thread is arranged on the stud of the limiting bolt, and a height of the stud of the limiting bolt is greater than a height of the limiting screw hole.

7. The tapered shaft edge grinding fixture according to claim 1, characterized in that: The axis of the limiting screw hole passes through half of the length of the positioning hole.

8. The tapered shaft edge grinding fixture according to claim 1, characterized in that: The positioning step and the positioning block are both cylindrical, and the width of the positioning groove is greater than the diameters of the positioning step, the positioning block and the positioning pin head.

9. The tapered shaft edge grinding fixture according to claim 8, characterized in that: The axes of the positioning step and the positioning hole are located at half the height of the positioning groove.

10. The tapered shaft edge grinding fixture according to claim 1, characterized in that: The positioning end of the clamp body is located at the bottom of the clamping end, and a plurality of positioning screw holes are arranged at the bottom of the positioning end of the clamp body.

Images