CN217618201U - Gear grinding machining clamp - Google Patents

Abstract

The utility model discloses a gear grinding processing jig, which comprises an expansion sleeve seat and an expansion sleeve mandrel arranged coaxially. The expansion sleeve seat comprises a vertically arranged cylindrical cylinder, an expansion sleeve hole in the center of the cylindrical cylinder is open at the upper end, and the cylindrical cylinder has an open upper end. A plurality of vertically extending expansion slits are arranged on the cylinder wall to divide the upper part of the cylindrical cylinder wall into a plurality of side walls with the upper ends separated and the lower ends connected, and the upper end of the cylindrical cylinder extends into the inner hole of the gear to be processed, The outer periphery of the lower end is provided with a positioning platform, the upper end surface of the positioning platform supports the lower end surface of the gear to be processed, and the sleeve expansion mandrel can be inserted into the expansion sleeve hole through the opening at the upper end, and the multiple side walls of the cylindrical cylinder are stretched outward, so that the cylindrical cylinder wall The outer side supports the inner hole wall of the gear to be processed. The gear to be processed is supported by the sleeve expansion seat and the sleeve expansion mandrel. The method has strong versatility, high positioning accuracy, and fast locking. After tightening, the parts and the clamping mechanism can be concentric, which can ensure the high quality of parts processing and improve the Efficiency, reliability, convenience, and low labor intensity.

Description

A gear grinding jig

technical field

The utility model relates to the field of parts processing, in particular to a gear grinding processing fixture.

Background technique

Gear parts have high precision requirements. When the teeth are ground, there is no screw hole on the end face, or when other holes are used for clamping, if the inner hole of the gear is used for clamping, the alignment of the parts cannot be achieved by aligning the inner hole. The finishing of the teeth is performed. Therefore, the finishing of the teeth is generally realized by clamping with the aid of an external tool. The existing methods for processing such parts are generally: making a mandrel, assembling the mandrel and the gear together, using the center hole of the mandrel, the chuck clamps the outer circle of one end of the mandrel, and the center hole at the other end of the top of the top realizes the parts processing.

However, in the prior art, the above-mentioned positioning method takes a long time in the process of installation and alignment, and during the disassembly of the mandrel, the inner hole of the gear part is often strained, which seriously affects the surface quality and even causes the generation of substandard products.

Therefore, how to provide a convenient and fast gear grinding jig is a technical problem that those skilled in the art need to solve at present.

Utility model content

The purpose of the utility model is to provide a gear grinding processing fixture, which is suitable for clamping high-precision parts in large quantities, can ensure high quality of parts processing, improve efficiency, reliability, convenience and speed, and low labor intensity.

In order to solve the above technical problems, the present utility model provides a gear grinding jig, which includes a coaxially arranged expansion sleeve seat and an expansion sleeve mandrel, the expansion sleeve seat includes a vertically arranged cylindrical cylinder, and the center of the cylindrical cylinder is The upper end of the expansion sleeve hole is open, and the cylinder wall of the cylindrical cylinder is provided with a plurality of vertically extending expansion slits to divide the upper part of the cylindrical cylinder wall into a plurality of side walls with the upper ends separated and the lower ends connected, The upper end of the cylindrical cylinder extends into the inner hole of the gear to be processed, the outer periphery of the lower end of the cylindrical cylinder is provided with a positioning platform, the upper end surface of the positioning platform supports the lower end surface of the gear to be processed, and the expansion sleeve can be inserted through the opening of the upper end. The expanding sleeve hole stretches the plurality of side walls of the cylindrical cylinder outwards, so that the outer side of the cylindrical cylinder wall can support the inner hole wall of the gear to be processed.

Preferably, a plurality of the expansion slits are evenly distributed along the circumference.

Preferably, the lower end of the expansion slit is provided with a strain relief hole.

Preferably, the lower end of the cylindrical cylinder is provided with a straight hole that communicates with the expansion hole, the diameter of the expansion hole is smaller than the diameter of the straight hole, and the connection between the straight hole and the expansion hole is provided with a transition rounded corners.

Preferably, the positioning platform is an annular platform surrounding the lower end of the cylindrical cylinder, and the lower end surface of the annular platform is flush with the lower end surface of the cylindrical cylinder.

Preferably, the positioning platform is provided with a plurality of stepped through holes, and bolts pass through the stepped through holes to connect the workbench.

Preferably, the cylindrical barrel and the positioning platform are integrally formed.

Preferably, the diameter of the sleeve-expanding mandrel gradually decreases from top to bottom, and the taper of the outer wall of the sleeve-expanding mandrel matches the taper of the sleeve-expanding hole.

Preferably, the upper end of the expansion sleeve is provided with a lifting ring.

Preferably, a threaded hole is provided at the center of the upper end face of the expanding mandrel, and the lower end of the lifting ring is screwed into the threaded hole.

The utility model provides a gear grinding processing jig, which comprises an expansion sleeve seat and an expansion sleeve core shaft arranged coaxially, the expansion sleeve seat comprises a vertically arranged cylindrical cylinder, an expansion sleeve hole in the center of the cylindrical cylinder is open at the upper end, A plurality of vertically extending expansion slits are arranged on the cylinder wall to divide the upper part of the cylindrical cylinder wall into a plurality of side walls with the upper ends separated and the lower ends connected, and the upper end of the cylindrical cylinder extends into the inner hole of the gear to be processed, The outer periphery of the lower end is provided with a positioning platform, the upper end surface of the positioning platform supports the lower end surface of the gear to be processed, and the sleeve expansion mandrel can be inserted into the expansion sleeve hole through the opening at the upper end, and the multiple side walls of the cylindrical cylinder are stretched outward, so that the cylindrical cylinder wall The outer side supports the inner hole wall of the gear to be processed.

The gear to be processed is supported by the sleeve expansion seat and the sleeve expansion mandrel. The method has strong versatility, high positioning accuracy, and fast locking. After tightening, the parts and the clamping mechanism can be concentric, and there is no need to align again, which is suitable for large quantities. High-precision parts clamping can ensure high-quality parts processing, improve efficiency, reliability, convenience, and low labor intensity.

Description of drawings

1 is a schematic cross-sectional view of a specific embodiment of a gear grinding processing fixture provided by the utility model;

Fig. 2 is the front sectional schematic diagram of the expansion sleeve seat in a specific embodiment of the gear grinding processing fixture provided by the utility model;

FIG. 3 is a schematic top view of the expansion sleeve seat in a specific embodiment of the gear grinding processing fixture provided by the present invention.

Detailed ways

The core of the utility model is to provide a gear grinding processing fixture, which is suitable for clamping high-precision parts in large quantities, and can ensure the high quality of parts processing, improve efficiency, reliability, convenience and speed, and low labor intensity.

In order to make those skilled in the art better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Please refer to FIGS. 1 to 3 , FIG. 1 is a schematic cross-sectional view of a specific embodiment of a gear grinding jig provided by the utility model; FIG. 2 is a specific embodiment of the gear grinding jig provided by the utility model. Figure 3 is a schematic top view of the expansion sleeve in a specific embodiment of the gear grinding processing fixture provided by the utility model.

The specific embodiment of the present utility model provides a gear grinding jig, which includes an expanding sleeve seat 1 and an expanding sleeve mandrel 2 arranged coaxially. The expansion hole, the upper end of the expansion hole is open, the cylinder wall of the cylindrical cylinder 11 is provided with a plurality of vertically extending expansion slits 12, the expansion slits 12 are cut down from the top of the cylinder wall to the middle of the cylinder wall, and a plurality of expansion slits are formed. The slits 12 are arranged in sequence along the circumferential direction, and the upper part of the cylindrical wall of the cylindrical cylinder 11 is divided into a plurality of side walls by a plurality of expansion slits 12, and the plurality of side walls are arranged in sequence around the axis to form a cylindrical structure. The upper ends of the plurality of side walls are separated and the lower ends are connected. The upper end of the cylindrical cylinder 11 extends into the inner hole of the gear 3 to be processed. The outer circumference of the lower end of the cylindrical cylinder 11 is provided with a positioning platform 13, which is installed on the workbench through the positioning platform 13. The upper end surface of the positioning platform 13 The lower end face of the gear 3 to be processed is supported, and the sleeve expansion mandrel 2 can be inserted into the sleeve expansion hole from the upper end opening, and the multiple side walls of the cylindrical cylinder 11 are stretched outwards, so that the outer side of the cylinder wall of the cylindrical cylinder 11 supports the gear 3 to be processed. the inner hole wall.

The gear 3 to be processed is supported by the sleeve expansion seat 1 and the sleeve expansion mandrel 2. The method has strong versatility, high positioning accuracy, and fast locking. After tightening, the parts and the clamping mechanism can be concentric, and there is no need to align them again. It is suitable for high-precision parts clamping in large quantities, which can ensure the high quality of parts processing, improve efficiency and reliability, and is convenient and fast, with low labor intensity.

Specifically, the positioning platform 13 is an annular platform surrounding the lower end of the cylindrical cylinder 11 , and the lower end surface of the annular platform is flush with the lower end surface of the cylindrical cylinder 11 .

During use, place the expansion sleeve 1 on the workbench, align the outer circle of the expansion sleeve 1, ensure the coaxiality of the upper and lower outer circles of the expansion sleeve 1, and align the lower end face to ensure that it is perpendicular to the outer circle. Then fasten the sleeve 1 on the workbench. It is ensured that the expansion sleeve 1 is concentric with the machine tool table and cannot move relative to it. Specifically, the roughness of each outer surface is guaranteed to be Ra0.8.

Install the gear 3 to be processed on the upper end of the cylinder 11 , fit the inner hole of the gear 3 to be processed with the outer side of the cylinder wall of the cylinder 11 , and fit the lower end face of the gear 3 to be processed with the upper end face of the positioning platform 13 .

Insert the expansion sleeve mandrel 2 into the expansion sleeve hole from the upper end opening, and press the expansion sleeve mandrel 2 downward. Due to the structure of the expansion slot 12, radial elastic expansion and contraction can be generated. By pressing the expansion sleeve mandrel 2, it can be The cylinder wall of the cylindrical cylinder 11 is opened outward, making the cylindrical cylinder 11 radially larger, and supporting the inner hole wall of the gear 3 to be processed, and the interference fit between the various components can be achieved, and the parts can be locked to realize the expansion of the sleeve seat 1. , Precise positioning of the gear 3 to be processed and the mandrel 2 to expand the sleeve.

After completing the clamping and finishing the teeth, the repeated positioning accuracy of different workpieces can reach 0.01, and the grinding accuracy can reach three levels.

After finishing the finishing of the gear teeth, pull out the sleeve shaft 2, under the action of elasticity, the cylinder wall of the cylinder 11 is retracted inward, and the outer circle of the sleeve seat 1 and the inner hole of the gear 3 to be processed become a clearance fit, which can be easily Remove the gear 3 to be processed without causing damage to the inner hole of the gear.

By adopting the above method, through the assembly of the sleeve expansion seat 1, the sleeve expansion mandrel 2, and the gear to be processed 3, the positioning of the parts and the clamping mechanism can be realized after fastening, and the workpiece does not need to be aligned again, which greatly improves the work efficiency and efficiency. positioning accuracy. The diameter of the inner hole of the part varies within the range of ±0.1, and the sleeve 1 can be clamped. Adding reducing sleeves and adjusting pads can clamp a variety of parts with different diameters and different tooth widths.

Preferably, the plurality of expansion slits 12 are evenly distributed along the circumference. The lower end of the expansion slit 12 is provided with a strain relief hole 14 to avoid cracking of components and ensure the safety and reliability of the equipment.

In the gear grinding processing fixture provided by the specific embodiment of the present invention, the cylindrical cylinder 11 is a sleeve structure that penetrates up and down, the lower end of the cylindrical cylinder 11 is provided with a straight hole that communicates with the expansion hole, and the diameter of the expansion hole is smaller than the diameter of the straight hole. Diameter, a transition fillet is set at the connection between the straight hole and the expansion hole, so that the cylinder wall at the connection is thinner and the elastic deformation of the side wall is convenient.

In order to achieve stable connection with the workbench, the positioning platform 13 is provided with a plurality of stepped through holes 15. During installation, the bolts pass through the stepped through holes 15 and then connect to the workbench, and the bolts are completely embedded in the stepped through holes 15 to ensure positioning. The flatness of the upper end surface of the platform 13 . Specifically, the plurality of stepped through holes 15 are uniformly arranged on the positioning platform 13 in turn in the circumferential direction, and other connection methods, such as snap connection, can also be used, which are all within the protection scope of the present invention. Wherein, the cylindrical barrel 11 and the positioning platform 13 are integrally formed.

In order to facilitate the smooth pull-out of the sleeve-expanding mandrel 2, an inverted tapered surface can be set on the outer circumference of the sleeve-expanding mandrel 2, and the inner wall of the sleeve-expanding hole is also set to a matching conical surface, that is, the sleeve-expanding mandrel 2 is in the shape of an inverted truncated cone. The diameter of the expanding mandrel 2 gradually decreases from top to bottom, the shape of the expanding hole is similar, and the taper of the outer wall of the expanding mandrel 2 is matched with the taper of the expanding hole.

On the basis of the gear grinding processing jig provided by the above-mentioned specific embodiments, the upper end of the expanding mandrel 2 is provided with a lifting ring. Specifically, a threaded hole 21 is provided at the center of the upper end face of the expanding mandrel 2 , and the lower end of the lifting ring is screwed into the threaded hole 21 . After finishing the finishing of the gear teeth, screw the lifting ring into the threaded hole 21 on the upper end face of the expanding mandrel 2, and then the expanding mandrel 2 can be pulled out.

The gear grinding processing fixture provided by the present utility model has been introduced in detail above. The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present utility model, some improvements and modifications can also be made to the present utility model, and these improvements and modifications also fall into the protection of the claims of the present utility model. within the range.

Claims (10)

1. A gear grinding jig, characterized in that it comprises an expanding sleeve seat (1) and an expanding sleeve mandrel (2) arranged coaxially, and the expanding sleeve seat (1) comprises a vertically arranged cylindrical cylinder (1). 11), the upper end of the expansion sleeve hole in the center of the cylindrical cylinder (11) is open, and a plurality of vertically extending expansion slits (12) are provided on the cylinder wall of the cylindrical cylinder (11) to connect the cylindrical cylinder (11). (11) The upper part of the cylinder wall is divided into a plurality of side walls with separate upper ends and connected lower ends, the upper end of the cylindrical cylinder (11) extends into the inner hole of the gear (3) to be processed, and the outer periphery of the lower end of the cylindrical cylinder (11) is provided There is a positioning platform (13), the upper end surface of the positioning platform (13) supports the lower end surface of the gear (3) to be processed, and the expansion sleeve mandrel (2) can be inserted into the expansion sleeve hole from the upper end opening, and the cylindrical The multiple side walls of the cylinder (11) are stretched outward, so that the outer side of the cylinder wall of the cylindrical cylinder (11) supports the inner hole wall of the gear (3) to be processed. 2 . The gear grinding jig according to claim 1 , wherein a plurality of the expansion slits ( 12 ) are evenly distributed along the circumference. 3 . 3 . The gear grinding jig according to claim 2 , wherein a strain relief hole ( 14 ) is provided at the lower end of the expansion slit ( 12 ). 4 . 4 . The gear grinding jig according to claim 3 , wherein the lower end of the cylindrical cylinder ( 11 ) is provided with a straight hole communicating with the expansion hole, and the diameter of the expansion hole is smaller than the diameter of the straight hole. 5 . The diameter of the hole, the connection between the straight hole and the expansion sleeve hole is provided with a transition fillet. 5. The gear grinding jig according to claim 1, wherein the positioning platform (13) is specifically a circular ring platform surrounding the lower end of the cylindrical cylinder (11), and the lower end surface of the circular ring platform and The lower end surface of the cylindrical cylinder (11) is flush. 6 . The gear grinding jig according to claim 5 , wherein a plurality of stepped through holes ( 15 ) are provided on the positioning platform ( 13 ), and bolts pass through the stepped through holes ( 15 ). 7 . Connect the workbench. 7 . The gear grinding jig according to claim 6 , wherein the cylindrical barrel ( 11 ) and the positioning platform ( 13 ) are integrally formed. 8 . 8 . The gear grinding jig according to claim 1 , wherein the diameter of the expanding mandrel ( 2 ) gradually decreases from top to bottom, and the taper of the outer wall of the expanding mandrel ( 2 ) is the same as that of the expanding mandrel ( 2 ). Casing taper fit. 9. The gear grinding jig according to any one of claims 1 to 8, characterized in that a lifting ring is provided on the upper end of the expanding mandrel (2). 10 . The gear grinding jig according to claim 9 , wherein a threaded hole ( 21 ) is provided at the center of the upper end face of the expansion sleeve ( 2 ), and the lower end of the lifting ring is screwed into the threaded hole. 11 . (21).

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