CN217943000U

CN217943000U - Positioning fixture for machining shaft workpieces with splines

Info

Publication number: CN217943000U
Application number: CN202220888266.4U
Authority: CN
Inventors: 余志华; 陆一骏; 程盛; 令狐浪浪; 王多; 叶和顺; 杨康乐; 陈嘉诚
Original assignee: Zhejiang Wanliyang Intelligent Manufacturing Co ltd
Current assignee: Zhejiang Wanliyang Intelligent Manufacturing Co ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-12-02
Anticipated expiration: 2032-04-18

Abstract

The utility model relates to a frock clamp makes the field, is a positioning fixture is used in processing of axle type work piece with spline. The positioning fixture comprises a core rod and a tip arranged at the front end of the core rod, wherein a spline sleeve is arranged on the outer side of the front end of the core rod, the spline sleeve is coaxial with the tip, an inner spline matched with an outer spline of the outer wall of the end part of the shaft workpiece is arranged on the inner wall of the spline sleeve, and the core rod is in transmission connection with the spline sleeve. The utility model has the advantages that: the phenomenon that the shaft workpiece slips at the joint of the conical surface of the tip in the process of external grinding and grinding can be eliminated; the abrasion of the matching between parts can be reduced, and the stability of the matching between the shaft workpiece and the tip can be improved.

Description

Positioning fixture for machining shaft workpieces with splines

Technical Field

The utility model relates to a frock clamp makes the field, is a positioning fixture is used in processing of axle type work piece with spline.

Background

When a shaft workpiece is ground, a tip is usually fixed on each of the clamping headstock and the clamping tailstock and is driven axially by the clamping tailstock hydraulic pressure, so that the conical surfaces of the tips of the clamping headstock and the clamping tailstock prop against the conical surfaces of two sides of a shaft, the shaft workpiece is in friction fit with the conical surface joint of the tips, and the shaft workpiece cannot be driven to rotate by the grinding wheel.

However, because the conical surface binding surface of the shaft workpiece and the tip is small, when the roughness of the conical surface of the shaft workpiece is poor, the friction force at the binding part of the shaft workpiece and the tip is small, and the shaft workpiece may be driven by the grinding wheel to rotate during grinding, so that the shaft workpiece and the tip slide relatively, and the grinding effect on the shaft workpiece is influenced.

Disclosure of Invention

The utility model aims at providing an axle type is positioning fixture for processing can eliminate the phenomenon that axle type work piece skidded with top conical surface laminating department in grinding process outward.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the positioning fixture comprises a core rod and a tip arranged at the front end of the core rod, wherein a spline sleeve is arranged on the outer side of the front end of the core rod, the spline sleeve is coaxial with the tip, an inner spline matched with an outer spline of the outer wall of the end part of the shaft workpiece is arranged on the inner wall of the spline sleeve, and the core rod is in transmission connection with the spline sleeve.

The center is fixed on a clamping machine tailstock and a clamping machine headstock through a core rod, the center is driven axially through the clamping machine tailstock, so that the top conical surface of the center is attached to the conical surface of the central hole of the shaft workpiece and matched with the clamping machine headstock to support the shaft workpiece, the front end of the spline sleeve can slide into the shaft workpiece by rotating the shaft workpiece, an internal spline is matched with an external spline on the outer wall of the end part of the shaft workpiece, the spline sleeve can limit the sliding between the shaft workpiece and the center, and the phenomenon that the shaft workpiece slips at the attaching position of the conical surface of the center in the external grinding process is eliminated.

Preferably, the cover is equipped with the sliding sleeve on the plug, but the axial can relative movement with plug circumference relative fixation of sliding sleeve, the sliding sleeve cover is established at the sliding sleeve outer wall, and the sliding sleeve can give the certain space of stepping down of internal spline and plug with the equal relative fixation of sliding sleeve circumference and axial through the sliding sleeve, prevents screens and friction between internal spline and the plug, has alleviateed the wearing and tearing of internal spline.

Preferably, the anterior segment of plug forms a path section, the root of path section is a step face, be equipped with a plurality of blind hole on the step face, the sliding sleeve cover is established at path section outer wall, is equipped with compression spring in the blind hole, compression spring's outer end offsets with the tip of sliding sleeve, compression spring makes the sliding sleeve have the outside motion trend of axial.

Can drive the sliding sleeve through compression spring and slide for the spline housing can float, and when the internal spline was in coordination with the external spline of axle type work piece tip outer wall, make the internal spline have the outside motion trend of axial, kept the external spline complex stability of internal spline and axle type work piece tip outer wall.

Preferably, pass through the key-type connection between sliding sleeve and the plug, make the plug can restrict the rotation of sliding sleeve, but can not restrict the slip of sliding sleeve.

Preferably, minor diameter section front end cover is equipped with and is used for sliding spacing circlip to the sliding sleeve for circlip is spacing to the sliding distance of sliding sleeve, prevents the sliding sleeve roll-off plug.

Preferably, the axial length of the inner spline is smaller than that of the outer spline of the outer wall of the end part of the shaft workpiece, so that a sliding gap exists between the inner spline and the outer spline when the inner spline is matched with the outer spline, the inner spline is not easy to clamp when matched with the outer spline, friction between the inner spline and the outer spline sleeve is reduced, and abrasion of the inner spline and the outer spline is reduced.

The outer side of the core rod is sleeved with a round nut in threaded connection, the round nut can rotate to extrude the core rod fixed on the tailstock of the clamping machine, the round nut rotates to extrude the tailstock of the clamping machine, the round nut can eject the core rod in the rotation process, and the iron core is more convenient to disassemble.

Preferably, the round nut front side is equipped with the uide bushing that is used for sliding guide to the sliding sleeve for the uide bushing can prevent that the gliding axis of sliding sleeve from taking place the skew to the gliding direction of sliding sleeve.

The utility model has the advantages that: the phenomenon that the shaft workpiece slips at the joint of the conical surface of the tip in the process of external grinding and grinding can be eliminated; the abrasion of the matching between parts can be reduced, and the stability of the matching between the shaft workpiece and the tip can be improved.

Drawings

Fig. 1 is a schematic structural view of a positioning fixture for shaft machining according to the present invention;

fig. 2 is a half sectional view of a positioning jig for shaft machining according to the present invention;

fig. 3 is a schematic structural view of the center of the present invention;

FIG. 4 is a schematic structural view of the spline housing of the present invention;

fig. 5 is a schematic structural view of the sliding sleeve of the present invention.

Detailed Description

The invention will be further described with reference to the drawings and the specific embodiments.

Shown by fig. 1-5, the utility model discloses an axle type work piece processing is with positioning fixture with spline, including plug 1 with locate top 2 of 1 front end of plug, the front end outside of plug 1 is equipped with spline housing 3, spline housing 3 with top 2 coaxial and inner wall be equipped with be used for with axle type work piece tip outer wall's external splines complex internal spline 10, internal spline 10 axial length be less than with the axial length of axle type work piece tip outer wall's external splines, the cover is equipped with sliding sleeve 4 on plug 1, has seted up keyhole 15 on the sliding sleeve 4, be equipped with on plug 1 can with the key-type connection between 14 and the plug 1 of keyhole 15 complex parallel key, spline housing 3 and the 4 thread fixing of sliding sleeve are connected.

As shown in fig. 2-3, the front section of the mandrel 1 is formed into a small diameter section 12, the root of the small diameter section 12 is a step surface 13, three blind holes 11 are formed on the step surface 13, the sliding sleeve 4 is sleeved on the outer wall of the small diameter section 12, a compression spring 5 is arranged in the blind hole 11, the outer end of the compression spring 5 abuts against the end of the sliding sleeve 4, and the compression spring 5 makes the sliding sleeve 4 have an axial outward movement tendency.

As shown in fig. 2, the front end of the small diameter section 12 is sleeved with a circlip 15 for limiting the sliding of the sliding sleeve 4.

As shown in fig. 1-2, a threaded round nut 6 is sleeved outside the core rod 1, the round nut 6 can be rotatably extruded out of the core rod 1 fixed on the tailstock of the clamping machine, and a guide sleeve 7 for slidably guiding the sliding sleeve 4 is arranged on the front side of the round nut 6.

Firstly, a centre 2 is fixed on a clamping machine tailstock and a clamping machine headstock through a core rod 1, and is driven axially through the clamping machine tailstock, so that the top conical surface of the centre is attached to the conical surface of the central hole of the shaft workpiece, and the centre is matched with the clamping machine headstock to support the shaft workpiece.

Secondly, in the process of rotating the shaft workpiece, the compression spring 5 extrudes the sliding sleeve 4 to drive the sliding sleeve 4 to axially slide on the flat key 14, and simultaneously drives the spline sleeve 3 to axially slide, and the sliding distance of the sliding sleeve 4 is limited through the elastic retainer ring 8, so that the front end of the spline sleeve 3 is extruded onto the shaft workpiece through the axial extrusion force of the compression spring 5, and the internal spline 10 is matched with the external spline of the outer wall of the end part of the shaft workpiece, so that the spline sleeve can limit the sliding between the shaft workpiece and the tip 2, and the phenomenon that the shaft workpiece slips at the conical surface fitting part of the tip in the external grinding process is eliminated.

Finally, after the shaft part is machined, the round nut 6 is rotated, so that the round nut 6 can extrude the tailstock of the clamping machine and push out the core rod 1, and the core rod is convenient to disassemble.

Claims

1. The utility model provides a shaft class positioning fixture for work piece processing with spline which characterized in that: the shaft type workpiece end part spline assembly comprises a core rod (1) and a tip (2) arranged at the front end of the core rod (1), wherein a spline sleeve (3) is arranged on the outer side of the front end of the core rod (1), the spline sleeve (3) is coaxial with the tip (2), an inner spline (10) matched with an outer spline of the outer wall of the end part of a shaft type workpiece is arranged on the inner wall of the spline sleeve, and the core rod (1) is in transmission connection with the spline sleeve (3).

2. The positioning fixture for processing the shaft workpieces with splines of claim 1, characterized in that: the plug (1) is sleeved with a sliding sleeve (4), the sliding sleeve (4) and the plug (1) are circumferentially relatively fixed and axially relatively movable, the outer wall of the sliding sleeve (4) is sleeved with a spline sleeve (3), and the spline sleeve (3) and the sliding sleeve (4) are circumferentially and axially relatively fixed.

3. The positioning fixture for processing the shaft workpieces with splines of claim 2, wherein: the anterior segment of plug (1) forms into a path section (12), the root of path section (12) is a step face (13), be equipped with a plurality of blind hole (11) on step face (13), sliding sleeve (4) cover is established at path section (12) outer wall, is equipped with compression spring (5) in blind hole (11), the outer end of compression spring (5) offsets with the tip of sliding sleeve (4), compression spring (5) make sliding sleeve (4) have the outside motion trend of axial.

4. The positioning fixture for processing the shaft-type workpiece with the spline according to claim 2 or 3, characterized in that: the sliding sleeve (4) is connected with the core rod (1) through a key.

5. The positioning fixture for processing the shaft workpieces with splines of claim 3, wherein: the front end of the small-diameter section (12) is sleeved with an elastic check ring (8) used for limiting the sliding of the sliding sleeve (4).

6. The positioning fixture for processing the shaft workpiece with the spline according to claim 1, characterized in that: the axial length of the internal spline (10) is smaller than that of an external spline on the outer wall of the end part of the shaft workpiece.

7. The positioning fixture for processing the shaft workpieces with splines of claim 1, characterized in that: the outer side of the core rod (1) is sleeved with a round nut (6) in threaded connection, and the round nut (6) can rotate to extrude the core rod (1) fixed on the tailstock of the clamping machine.

8. The positioning fixture for processing the shaft workpieces with splines of claim 7, wherein: the front side of the round nut (6) is provided with a guide sleeve (7) which is in sliding fit with the sliding sleeve (4) and is used for guiding the sliding sleeve (4) in a sliding manner.