Chamfering equipment

Abstract

The utility model belongs to the field of devices for grinding, and particularly relates to chamfering equipment. In order to solve the technical problem that in the prior art, due to the fact that an angle adjusting plate of chamfering equipment is used for clamping, fixing and rotating a column tooth, the number of parts is large, and the structure is complex, the utility model provides the chamfering equipment. The chamfering equipment comprises a grinding wheel, a rotating power source used for driving the grinding wheel to rotate and a support, a sleeve is arranged on the support, a cylindrical to-be-chamfered workpiece is installed in the sleeve, the inner wall of the sleeve is in clearance fit with the to-be-chamfered workpiece, and the sleeve is provided with a push rod used for stretching into the sleeve to push the to-be-chamfered workpiece. The side wall of the sleeve is provided with an opening groove allowing the grinding wheel to stretch into. Due to the fact that the to-be-chamfered workpiece is in clearance fit with the inner wall of the sleeve, the to-be-chamfered workpiece can circumferentially rotate under the guidance of the inner wall of the sleeve, the to-be-chamfered workpiece is pushed to the position of the grinding wheel through the push rod, machining of the to-be-chamfered workpiece is achieved, the structure is simple, and machining is convenient.

Description

Technical Field

[0001] The utility model belongs to the field of devices for grinding, and particularly relates to a chamfering device. Background Art

[0002] The diameters of the button bits commonly used in down-the-hole drills are relatively fixed, generally 13mm, 14mm, 16mm or 18mm. Before inlaying the button bits into the tooth holes of the drill bits, it is necessary to process chamfers at the bottoms of the button bits, and a chamfering device is required for chamfering.

[0003] For example, the Chinese utility model patent with the authorization publication number of CN217194395U and the authorization publication date of August 16, 2022 discloses a chamfering device. The chamfering device includes a base, a grinding mechanism arranged on the base, and an angle adjustment plate. The grinding mechanism includes a rotary power source and a grinding wheel (i.e., a grinding wheel). The bottom end surface and the top end surface of the angle adjustment plate form a certain angle α, and the chamfering angle is set by adjusting the angle α. Specifically, the angle adjustment plate is processed with mounting holes for mounting button bits. Bearings are installed inside the mounting holes, a bushing is connected to the bearings, an open-threaded sleeve is installed at the upper end of the bushing, an elastic sleeve is installed in the open-threaded sleeve, and the open-threaded sleeve is provided with a locking nut; when the locking nut is tightened on the open-threaded sleeve, the elastic sleeve deforms, and the button bit is clamped in the elastic sleeve; when the locking nut is unscrewed from the open-threaded sleeve, the elastic sleeve returns to its original state and releases the button bit.

[0004] In the above chamfering device, there are many components for the angle adjustment plate to realize clamping and fixing and rotation of the button bits, resulting in a complex structure of the chamfering device. Moreover, when processing button bits with different chamfering angles, different angle adjustment plates need to be replaced. Of course, the above chamfering device can also be used for processing other cylindrical workpieces to be chamfered except button bits. Content of the Utility Model

[0005] The purpose of the utility model is to provide a chamfering device to solve the technical problem that the angle adjustment plate of the existing chamfering device has many components for realizing clamping and fixing and rotation of the button bits, resulting in a complex structure.

[0006] To achieve the above purpose, the technical solution of the chamfering device provided by the utility model is as follows:

[0007] A chamfering device includes a grinding wheel, a rotary power source for driving the grinding wheel to rotate, and a bracket. A sleeve for loading a cylindrical workpiece to be chamfered and having an inner wall in clearance fit with the workpiece to be chamfered is arranged on the bracket. The sleeve is provided with a push rod for extending into the sleeve to push the workpiece to be chamfered. An opening groove for the grinding wheel to extend into is formed on the side wall of the sleeve, or one end of the sleeve extends to the grinding wheel to push one end of the workpiece to be chamfered out of the sleeve and contact the grinding wheel through the push rod.

[0008] Furthermore, the sleeve is a transparent sleeve.

[0009] Furthermore, the bracket includes a base and a connecting seat. The sleeve is fixedly arranged on the connecting seat, and the connecting seat is rotatably mounted on the base to adjust the angle between the axis of the sleeve and the axis of the grinding wheel; the connecting seat and the base are configured with a locking member for unlocking or locking the relative position between the connecting seat and the base.

[0010] Furthermore, a rotating shaft is provided on the base, a through hole corresponding to the rotating shaft is provided on the connecting seat, the rotating shaft passes through the through hole and a part of the rotating shaft is provided with an external thread, and a locking nut is connected to the outside of the external thread of the rotating shaft, and the locking nut constitutes the locking member.

[0011] Furthermore, a graduated scale is provided on the connecting seat, and an indicating portion for indicating the rotation angle of the connecting seat is provided on the base; or, a graduated scale is provided on the base, and an indicating portion for indicating the rotation angle of the connecting seat is provided on the connecting seat.

[0012] Furthermore, the graduated scale is arranged on the connecting seat, the indicating portion is parallel to the axis of the grinding wheel, and the axis of the sleeve is parallel to the zero scale of the graduated scale.

[0013] Furthermore, a clamping structure for clamping the sleeve is provided on the bracket, and the clamping structure includes at least two clamping members arranged on the bracket along the axial direction of the sleeve.

[0014] Furthermore, each clamping member includes two clamping jaws for clamping the sleeve and an adjusting member for adjusting the relative distance between the two clamping jaws.

[0015] Furthermore, the central angle corresponding to the opening groove is less than 180°.

[0016] Furthermore, the push rod is a magnetic push rod for adsorbing on the workpiece to be chamfered made of metal.

[0017] The beneficial effects of the chamfering device of the present utility model are as follows: The present utility model is an improved invention. The grinding wheel can be driven to rotate by a rotating power source to grind the workpiece to be chamfered; the sleeve is arranged on the bracket, and the inner wall of the sleeve is in clearance fit with the cylindrical workpiece to be chamfered, so that the workpiece to be chamfered can move axially and rotate circumferentially along the sleeve. At the same time, the axis of the workpiece to be chamfered coincides with the axis of the sleeve. In one technical solution, by opening an opening groove on the side wall of the sleeve, the workpiece to be chamfered can be pushed to the opening groove by a push rod, and the grinding wheel can be extended into the opening groove to grind the workpiece to be chamfered, so as to realize the processing of the workpiece to be chamfered, with a simple structure and convenient processing; in another technical solution, one end of the sleeve extends to the grinding wheel, and one end of the workpiece to be chamfered is pushed out of the sleeve by a push rod and contacts the grinding wheel, so as to realize the processing of the workpiece to be chamfered, with a simple structure and convenient processing. When using the chamfering device in the present utility model to chamfer the workpiece to be chamfered, first, the workpiece to be chamfered is inserted into the sleeve, and the rotating power source is turned on to make the grinding wheel rotate. Then, in one technical solution, the workpiece to be chamfered is pushed to the opening groove by a push rod. At this time, the grinding wheel contacts the workpiece to be chamfered, and the workpiece to be chamfered rotates under the guidance of the inner wall of the sleeve, so as to realize the processing of the workpiece to be chamfered; in another technical solution, one end of the workpiece to be chamfered is pushed out of the sleeve by a push rod and contacts the grinding wheel, and the other end of the workpiece to be chamfered is still in the sleeve. Therefore, the workpiece to be chamfered rotates under the guidance of the inner wall of the sleeve, so as to realize the processing of the workpiece to be chamfered. Finally, the chamfered workpiece is taken out, and a new workpiece to be chamfered is replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a top view of an embodiment of the chamfering device of the present utility model;

[0019] Figure 2 is a schematic structural diagram of an embodiment of the chamfering device of the present utility model;

[0020] Figure 3 is Figure 1 an enlarged structural view of the column teeth in

[0021] DESCRIPTION OF THE REFERENCE NUMERALS:

[0022] 1, base; 2, rotating motor; 3, grinding wheel; 4, connecting seat; 41, indexer; 5, locking nut; 6, connecting bolt; 7, clamping member; 8, sleeve; 9, adjusting bolt; 10, column teeth. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to solve the technical problem that the structure of the chamfering device in the prior art is relatively complex, the present utility model proposes a new chamfering device. By providing a sleeve with an opening groove, a cylindrical workpiece to be chamfered that is in clearance fit with the inner wall of the sleeve can be placed into the sleeve. Since the workpiece to be chamfered is in clearance fit with the inner wall of the sleeve, the workpiece to be chamfered can rotate circumferentially under the guidance of the inner wall of the sleeve. The workpiece to be chamfered is pushed to the opening groove by a push rod, or one end of the workpiece to be chamfered is pushed out of the sleeve by a push rod, and the workpiece to be chamfered is ground by a grinding wheel, thereby realizing the processing of the workpiece to be chamfered.

[0024] The following further describes the present utility model in detail with reference to embodiments.

[0025] Specific Embodiment 1 of the chamfering device provided by the present utility model:

[0026] As Figures 1 to 3 shown, the chamfering device includes a grinding wheel, a rotary power source for driving the grinding wheel to rotate, and a bracket. The bracket is provided with a sleeve 8 for loading a cylindrical workpiece to be chamfered and having an inner wall in clearance fit with the workpiece to be chamfered. The sleeve 8 is configured with a push rod for extending into the sleeve 8 to push the workpiece to be chamfered. An opening groove for the grinding wheel to extend into is formed on the side wall of the sleeve 8.

[0027] Specifically, the grinding wheel is a cylindrical grinding wheel 3, the rotary power source is a rotary motor 2. The bracket is provided with a clamping structure for clamping the sleeve 8. The clamping structure is connected to the bracket by a connecting bolt 6. There is a certain included angle between the axis of the sleeve 8 and the axis of the grinding wheel 8. The chamfering angle depends on the included angle between the axis of the sleeve 8 and the axis of the grinding wheel 8. However, in other specific embodiments, the grinding wheel and the rotary power source can also be other existing grinding wheels and rotary power sources for grinding workpieces. For example, the grinding wheel is a frustum-shaped grinding wheel. When the axis of the sleeve 8 is parallel to the axis of the grinding wheel, there is a certain angle at the contact between the workpiece to be chamfered and the grinding wheel, and this angle is the chamfering angle; or, the clamping structure is not provided, and the sleeve is directly fixedly connected to the bracket; or, the clamping structure can also be integrally formed with the bracket.

[0028] The rotary power source can drive the grinding wheel to rotate to grind the workpiece to be chamfered; the clamping structure provided on the bracket can conveniently fix the sleeve 8. The inner wall of the sleeve 8 is in clearance fit with the cylindrical workpiece to be chamfered, so that the workpiece to be chamfered can axially move and circumferentially rotate along the sleeve 8, and the axis of the workpiece to be chamfered coincides with the axis of the sleeve 8; by forming an opening groove on the side wall of the sleeve 8, the workpiece to be chamfered can be pushed to the opening groove by a push rod, and the grinding wheel can extend into the opening groove to grind the workpiece to be chamfered, thereby realizing the processing of the workpiece to be chamfered, with a simple structure and convenient processing.

[0029] When chamfering a workpiece to be chamfered using the chamfering device in this specific embodiment, first, insert the workpiece to be chamfered into the sleeve 8 and turn on the rotary power source to rotate the grinding wheel. Then, use the push rod to push the workpiece to be chamfered to the open slot. At this time, the grinding wheel contacts the workpiece to be chamfered, and the workpiece to be chamfered rotates under the guidance of the inner wall of the sleeve 8, thereby realizing the processing of the workpiece to be chamfered. Finally, take out the chamfered workpiece and replace it with a new workpiece to be chamfered.

[0030] As Figure 1 shown, in order to conveniently observe the position of the workpiece to be chamfered, as a specific embodiment, the sleeve 8 is a transparent sleeve, and the staff can directly see the position of the workpiece to be chamfered. However, in other specific embodiments, the sleeve 8 can also be a non-transparent sleeve. When the staff hears the sound generated during grinding, they can know that the workpiece to be chamfered has come into contact with the grinding wheel 3.

[0031] As Figures 1 to 2 shown, in order to ensure that the sleeve 8 does not shake, as a specific embodiment, the clamping structure includes two clamping members 7 arranged on the bracket along the axial direction of the sleeve 8. However, in other specific embodiments, the number of clamping members 7 can also be three, four or more; or, there is one clamping member 7, but the length of the clamping member 7 along the axial direction of the sleeve 8 is long enough to ensure that the sleeve 8 does not shake by increasing the length of the clamping member 7 along the axial direction of the sleeve 8.

[0032] As Figures 1 to 2 shown, in order to conveniently replace sleeves with different inner diameters so as to realize the processing of cylindrical workpieces to be chamfered with different outer diameters, as a specific embodiment, each clamping member 7 includes two jaws for clamping the sleeve 8 and an adjusting member for adjusting the relative distance between the two jaws. Specifically, the adjusting member is an adjusting bolt 9; or, there is a screw on the jaw, and the adjusting member is an adjusting nut or other structures. By adjusting the adjusting bolt 9, the relative distance between the two jaws can be conveniently adjusted, thereby clamping different sleeves 8 and realizing the processing of workpieces to be chamfered with different outer diameters. However, in other specific embodiments, the clamping member 7 can be two elastic splints, and the sleeve 8 is clamped by the elastic force of the elastic splints. At the same time, the outer diameters of multiple sleeves 8 can be the same, but the inner diameters of each sleeve 8 are different, thereby realizing the processing of workpieces to be chamfered with different outer diameters; or, the clamping member 7 is removed by the connecting bolt 6 and different clamping members 7 are replaced to clamp different sleeves 8. In this embodiment, the specific structure of the adjusting member is not limited, as long as the adjusting member can adjust the relative distance between the two jaws.

[0033] As Figures 1 to 3As shown, in order to better prevent the workpiece to be chamfered from slipping out of the opening groove, as a specific embodiment, the central angle corresponding to the opening groove is less than 180°. Specifically, the size of the central angle corresponding to the opening groove can be 179°, 135°, 90° or 45°, etc. In this specific embodiment, the sleeve 8 has an open section with an opening groove and a closed section without an opening groove. The central angle corresponding to the opening groove can also be 185°. The staff pushes the workpiece to be chamfered forcefully through the push rod to ensure that the grinding wheel 3 always presses tightly against the workpiece to be chamfered, thereby preventing the workpiece to be chamfered from slipping out of the opening groove. However, in other specific embodiments, the sleeve 8 can also be a "C"-shaped sleeve. In this case, the sleeve only has an open section.

[0034] As Figures 1 to 2 shown, in order to conveniently achieve the machining of chamfers at different angles, as a specific embodiment, the bracket includes a base 1 and a connecting seat 4. The sleeve 8 is fixedly arranged on the connecting seat 4, and the connecting seat 4 is rotatably installed on the base 1 to adjust the included angle between the axis of the sleeve 8 and the axis of the grinding wheel. The connecting seat 4 and the base 1 are provided with locking members for unlocking or locking the relative positions of the connecting seat 4 and the base 1. Specifically, a rotating shaft is provided on the base 1, a through hole corresponding to the rotating shaft is provided on the connecting seat 4, the rotating shaft passes through the through hole and the passing part is provided with an external thread, and a locking nut 5 is connected to the outside of the external thread of the rotating shaft. The locking nut 5 constitutes the locking member.

[0035] By rotating the connecting seat 4, the included angle between the axis of the sleeve 8 and the axis of the grinding wheel 3 can be conveniently adjusted, so as to adjust the angle of chamfering the workpiece to be chamfered. By the locking nut 5, the connecting seat 4 can be conveniently locked, and the connecting seat 4 can be effectively prevented from rotating when the grinding wheel 3 grinds the workpiece to be chamfered. Of course, in other specific embodiments, the bracket can be integrally formed and fixed on the ground, and the angle of chamfering the workpiece to be chamfered is adjusted by rotating the axis of the grinding wheel 3. Or, a radial through hole is provided after the rotating shaft passes out of the through hole, and the relative positions of the base 1 and the connecting seat 4 are locked by inserting a split pin into the radial through hole. The split pin constitutes the locking member.

[0036] As Figures 1 to 2 shown, in order to conveniently judge the included angle between the axis of the sleeve and the axis of the grinding wheel 3, as a specific embodiment, a graduated scale 41 is provided on the connecting seat 4, and an indicating part for indicating the rotation angle of the connecting seat 4 is provided on the base 1. Specifically, the indicating part is parallel to the axis of the grinding wheel, and the axis of the sleeve 8 is parallel to the zero scale of the graduated scale 41. Among them, an edge of the base 1 constitutes the indicating part. However, in other specific embodiments, a pointer can also be provided on the base 1, and the pointer constitutes the indicating part. Or, a graduated scale 41 is provided on the base 1, and an indicating part for indicating the rotation angle of the connecting seat 4 is provided on the connecting seat 4.

[0037] The rotation angle of the connecting seat 4 can be conveniently indicated by the indicating part. When the indexing instrument 41 is located on the connecting seat 4 and the indicating part is parallel to the axis of the grinding wheel, since the axis of the sleeve 8 is parallel to the zero scale of the indexing instrument 41, the angle indicated by the indicating part is the included angle between the axis of the sleeve 8 and the axis of the grinding wheel. Of course, in other specific embodiments, the indexing instrument 41 may not be provided, and the included angle between the axis of the sleeve 8 and the axis of the grinding wheel can be measured with a protractor; or, the indicating part is perpendicular to the axis of the grinding wheel, and 90° is added / subtracted to / from the angle indicated by the indicating part to calculate the included angle between the axis of the sleeve 8 and the axis of the grinding wheel.

[0038] In this embodiment, the cylindrical workpiece to be chamfered is the column tooth 10 made of cemented carbide. To conveniently take out the column tooth 10, the push rod is a magnetic push rod used to adsorb on the workpiece to be chamfered made of metal. After the column tooth 10 is processed, the column tooth 10 is sucked by the magnetic push rod, and the column tooth 10 is taken out from the end of the sleeve 8 far away from the grinding wheel 3. Then, the new column tooth 10 to be chamfered is loaded into the sleeve 8 to realize continuous chamfering of the column tooth 10. However, in other specific embodiments, the workpiece to be chamfered can also be other cylindrical workpieces that need to be chamfered, and the workpiece to be chamfered may not be made of metal material. At this time, the push rod is not a magnetic push rod. After the workpiece to be chamfered is processed, the rotary motor 2 can be turned off, and the sleeve 8 can be removed to take out the workpiece to be chamfered.

[0039] Specific embodiment 2 of the chamfering device provided by the present utility model:

[0040] Refer to Figures 1 - 3 As shown, the chamfering device includes a grinding wheel and a rotary power source for driving the grinding wheel to rotate, and further includes a bracket. A sleeve 8 is provided on the bracket for loading a cylindrical workpiece to be chamfered and having an inner wall in clearance fit with the workpiece to be chamfered. The sleeve 8 is configured with a push rod for extending into the sleeve 8 to push the workpiece to be chamfered. Different from the specific embodiment 1 of the chamfering device of the present utility model, in this embodiment, one end of the sleeve 8 extends to the grinding wheel to push one end of the workpiece to be chamfered out of the sleeve 8 and contact the grinding wheel through the push rod.

[0041] Since one end of the sleeve 8 extends to the grinding wheel, the end of the workpiece to be chamfered can be pushed out of the sleeve 8 by the push rod and brought into contact with the grinding wheel, thereby realizing the machining of the workpiece to be chamfered. The chamfering angle depends on the included angle between the axis of the sleeve 8 and the axis of the grinding wheel. When chamfering the workpiece to be chamfered using the chamfering device in this specific embodiment, first, the workpiece to be chamfered is inserted into the sleeve 8, and the rotary power source is turned on to rotate the grinding wheel; then, the end of the workpiece to be chamfered is pushed out of the sleeve 8 by the push rod and brought into contact with the grinding wheel. The other end of the workpiece to be chamfered is still inside the sleeve 8. Therefore, the workpiece to be chamfered rotates under the guidance of the inner wall of the sleeve 8, thereby realizing the machining of the workpiece to be chamfered; finally, the chamfered workpiece is taken out, and a new workpiece to be chamfered is replaced.

[0042] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still make modifications to the technical solutions described in the foregoing embodiments without creative efforts, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A chamfering device, comprising a grinding wheel and a rotary power source for driving the grinding wheel to rotate, characterized in that: It also includes a bracket, on which is provided a sleeve for loading a cylindrical workpiece to be chamfered and whose inner wall is gap-matched with the workpiece to be chamfered, and the sleeve is provided with a push rod for extending into the sleeve to push the workpiece to be chamfered; an open groove for the grinding wheel to extend into is provided on the side wall of the sleeve, or one end of the sleeve extends to the grinding wheel, so that one end of the workpiece to be chamfered can be pushed out of the sleeve through the push rod and contact the grinding wheel.

2. The chamfering device according to claim 1, characterized in that: The sleeve is a transparent sleeve.

3. The chamfering device according to claim 1 or 2, characterized in that: The bracket includes a base and a connecting seat, the sleeve is fixedly arranged on the connecting seat, and the connecting seat is rotatably mounted on the base to adjust the angle between the axis of the sleeve and the axis of the grinding wheel; the connecting seat and the base are configured with a locking member for unlocking or locking the relative position of the connecting seat and the base.

4. The chamfering device according to claim 3, characterized in that: A rotating shaft is arranged on the base, a through hole corresponding to the rotating shaft is arranged on the connecting seat, the rotating shaft passes through the through hole and an external thread is arranged on the passing part, a locking nut is connected to the external thread of the rotating shaft, and the locking nut constitutes a locking member.

5. The chamfering device according to claim 3, characterized in that: The connecting seat is provided with a dividing meter, and the base is provided with an indicating part for indicating the rotation angle of the connecting seat; or, the base is provided with a dividing meter, and the connecting seat is provided with an indicating part for indicating the rotation angle of the connecting seat.

6. The chamfering device according to claim 5, characterized in that: The indexing instrument is arranged on the connecting seat, the indicating part is parallel to the axis of the grinding wheel, and the axis of the sleeve is parallel to the zero scale of the indexing instrument.

7. The chamfering device according to claim 1 or 2, characterized in that: The bracket is provided with a clamping structure for clamping the sleeve, and the clamping structure comprises at least two clamping members arranged on the bracket along the axial direction of the sleeve.

8. The chamfering device according to claim 7, characterized in that: Each clamping member comprises two clamping jaws for clamping the sleeve and an adjusting member for adjusting the relative distance between the two clamping jaws.

9. The chamfering device according to claim 1 or 2, characterized in that: The central angle corresponding to the opening groove is less than 180°.

10. The chamfering device according to claim 1 or 2, characterized in that: The push rod is a magnetic push rod used for adsorbing on a metal workpiece to be chamfered.

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