CN210849320U

CN210849320U - Lathe fixture for boring and chamfering spring ring parts

Info

Publication number: CN210849320U
Application number: CN201921667489.2U
Authority: CN
Inventors: 罗小松; 李红兵; 易承福; 傅仁科; 周家国; 钟仪权; 涂慧婕; 余刚; 闵璐; 吴凡
Original assignee: Jiangxi Hongdu Aviation Industry Group Co Ltd
Current assignee: Jiangxi Hongdu Aviation Industry Group Co Ltd
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-06-26
Anticipated expiration: 2029-10-08

Abstract

The utility model relates to a multi-functional lathe fixture for spring ring class part bore hole and chamfer belongs to the machine-building field. A lathe fixture for boring and chamfering spring ring parts comprises a lathe fixture base, a pressing end cover and a pressing bolt; a step hole is formed in the lathe fixture base along the axis of the lathe fixture base, and the step hole penetrates through two ends of the lathe fixture base; the pressing end cover is provided with a through hole, the aperture of the through hole is consistent with the aperture of the inner hole of the spring ring workpiece, and the pressing end cover is used for pressing the spring ring workpiece in the lathe fixture base; the compression bolt is arranged in the step hole and used for compressing the inner hole of the spring ring workpiece to realize chamfering, turning and positioning of the spring ring workpiece. The utility model has the advantages of as follows: 1. the machining size precision and the surface roughness are improved; 2. the defects of coaxiality and verticality are avoided; 3. the skill requirement on operators is reduced; 4. the structure is simple; 5. the multifunctional lathe fixture can be used for boring the inner hole of the spring ring part and simultaneously turning the end face chamfer of the spring ring part.

Description

Lathe fixture for boring and chamfering spring ring parts

Technical Field

The utility model relates to a multi-functional lathe fixture for spring ring class part bore hole and chamfer belongs to the machine-building field.

Background

In many spring ring class products, in order to satisfy the product assembly requirement, there are axiality and the straightness form and position tolerance requirement that hangs down in spring ring hole and excircle and terminal surface, and the part both ends design has the fish tail chamfer of preventing, and chamfer surface roughness requires highly to satisfy the final assembly test requirement of product. The previous processing scheme of the inner hole and chamfer angle of the spring ring is as follows: turning a bottom hole, boring by a single turning tool, turning a chamfer by a single piece, grinding an inner hole of a spring ring and the chamfer, testing product assembly, and passing, continuing circulation/rejecting a product.

The processing method of the original spring ring inner hole and chamfer angle is mainly turning and reaming the inner hole and chamfer angle. The machining method is low in efficiency and high in requirement on skills of operators, the size of the spring ring part is small and is not easy to clamp, the coaxiality and the verticality of an inner hole after the part is machined, the sizes of chamfers at two ends and the surface roughness are difficult to meet the requirement of product assembly testing, and the machining yield of the product is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that exists among the prior art, provide a lathe fixture that is used for spring ring class part bore hole and chamfer that machining efficiency is high, simple structure product percent of pass is high simultaneously.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a lathe fixture for boring and chamfering spring ring parts comprises a lathe fixture base, a pressing end cover and a pressing bolt; a stepped hole is formed in the lathe fixture base along the axis of the lathe fixture base, the stepped hole penetrates through two ends of the lathe fixture base, one end with a small aperture is clamped in a lathe clamping jaw, and a spring ring workpiece is placed in a large aperture; the pressing end cover is provided with a through hole, the aperture of the through hole is consistent with the aperture of the inner hole of the spring ring workpiece, and the pressing end cover is used for pressing the spring ring workpiece in the lathe fixture base to realize the boring positioning of the inner hole of the spring ring workpiece; the compression bolt is arranged in the step hole and used for compressing the inner hole of the spring ring workpiece to realize chamfering, turning and positioning of the spring ring workpiece.

Preferably, the pressing end cover is provided with an internal thread which is matched with an external thread arranged on the base of the lathe fixture.

Preferably, the outer surface that compresses tightly the end cover is provided with the recess, makes things convenient for operating personnel to rotate and compresses tightly the end cover.

The spring ring workpiece support device further comprises a support bushing, a through hole is formed in the support bushing, the aperture of the through hole is consistent with that of an inner hole of the spring ring workpiece, one end of the through hole abuts against the end portion of the stepped hole, and the other end of the through hole is in contact with the spring ring workpiece and is used for supporting the spring ring workpiece.

Further, still include the hole bush that rises, set up the through-hole that matches with compression bolt along its axle center, its outside and spring coil work piece contact.

Preferably, the through hole is a 60 ° taper.

The working principle is as follows: the inner hole and the turning chamfer are respectively bored by positioning the outer circle and the end face of a workpiece, the inner hole is bored by a workpiece for pressing the end cover fixing spring ring, and the inner hole expanding bush and the pressing bolt fixing spring ring are used for turning the chamfer, so that the requirements of the size, the surface roughness, the coaxiality and the verticality of the inner hole and the chamfer on the spring ring workpiece are met, and the requirements of product assembly testing are finally met.

Compared with the prior art, the utility model has the advantages of as follows:

1. the processing dimensional accuracy and the surface roughness of the inner hole and the chamfer of the spring ring part are improved, the form and position tolerance of the inner hole and the surface roughness of the chamfers at two ends are ensured, and the assembly and test requirements are met;

2. the defects that the coaxiality and the verticality of the inner hole of the spring ring are difficult to ensure in the clamping and processing of a single lathe, and the faults of uneven and out-of-tolerance chamfer sizes at two ends and the like are avoided;

3. the quick positioning, clamping and processing of the inner hole and the chamfer of the spring ring part are realized, the clamping and processing efficiency of the part is improved, and the requirement on the skill of an operator is reduced;

4. the lathe fixture is simple in structure, can be repeatedly used and is not easy to damage;

5. the multifunctional lathe fixture can be used for boring the inner hole of the spring ring part and simultaneously turning the end face chamfer of the spring ring part.

Drawings

FIG. 1 is a schematic view of clamping processing in boring an inner hole according to an embodiment of the present invention;

FIG. 2 is a schematic view of clamping processing when the chamfer is turned;

FIG. 3 is a schematic view of the lathe fixture of FIG. 1 (without lathe jaws);

FIG. 4 is a schematic view of the lathe clamp of FIG. 2 (without the lathe dog);

FIG. 5 is a schematic view of the structure of the lathe fixture base in the embodiment of the present invention;

fig. 6 is a schematic view of the structure of the compression end cap in the embodiment of the present invention;

FIG. 7 is a cross-sectional view of FIG. 6;

FIG. 8 is a schematic diagram of a spring coil workpiece according to an embodiment of the present invention;

FIG. 9 is a cross-sectional view of FIG. 8;

FIG. 10 is a schematic view of an embodiment of the present invention showing the inner hole expanding bush;

FIG. 11 is a view A-A of FIG. 10;

fig. 12 is a schematic view of the structure of the hold-down bolt in the embodiment of the present invention;

FIG. 13 is a right side view of FIG. 12;

in the figure, S1, lathe fixture base; s2, pressing the end cover; s3, spring coil workpieces; s4, supporting the bushing; s5, expanding the inner hole to form a lining; s6, pressing bolts; s7, lathe jaws.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings 1-13: as shown in fig. 1-4, a lathe clamp for boring and chamfering a spring ring part comprises a lathe clamp base S1, a pressing end cover S2, a support bush S4, an inner hole expanding bush S5 and a pressing bolt S6; a step hole is formed in the lathe clamp base S1 along the axis of the lathe clamp base, the step hole penetrates through two ends of the lathe clamp base, one end with a small aperture is clamped in a lathe clamping jaw S7, and a spring ring workpiece S3 is placed in a large aperture; the pressing end cover S2 is provided with a through hole, the aperture of the through hole is consistent with the aperture of the inner hole of the spring ring workpiece S3, and the pressing end cover S2 is used for pressing the spring ring workpiece in a lathe clamp base S1 to realize the boring positioning of the inner hole of the spring ring workpiece; and the compression bolt S6 is arranged in the step hole and used for compressing the inner hole of the spring ring workpiece to realize chamfering, turning and positioning of the spring ring workpiece.

As shown in fig. 5, the lathe fixture base S1 can be configured and positioned according to the size of the flange and the size of the bottom hole of the stepped hole in the flange.

As shown in fig. 6-7, the pressing end cover S2 is connected with the external thread on the base of the lathe fixture through the internal thread, so as to flatten and press the spring ring workpiece.

As shown in FIGS. 8-9, the spring coil workpiece S3 should have a certain clamping amount of wall thickness for clamping and positioning the workpiece on the lathe fixture, and then the workpiece is grooved and cut after finishing.

And the support bush S4 is used for supporting the spring ring workpiece, and the size and the precision of the excircle and the inner hole of the support bush are properly selected and matched according to the size of the boring hole of the workpiece and the protrusion amount of the chamfer of the workpiece.

As shown in FIGS. 10-11, the bore expansion liner S5 is used to compress spring coil workpieces, and the bore expansion liner thickness is tailored to the workpiece thickness.

As shown in FIGS. 12-13, the hold-down bolt S6 acts on the 60 degree taper of the inner bore expansion bush, which is forced to expand the hold-down spring ring work piece.

The embodiment of boring an inner hole is shown in fig. 1, the embodiment of turning a chamfer is shown in fig. 2, and the specific implementation steps are as follows:

(1) firstly, the support bush S4 is placed into an inner hole of a lathe clamp base S1, then a clamping boss (also designed into a standard taper shank form) of the lathe clamp base S1 is clamped in a lathe clamping jaw S7, and the end face of the clamp is clamped after being flatly attached to the clamping jaw;

(2) placing the spring coil workpiece S3 into a lathe fixture base S1;

(3) sleeving the pressing end cover S2 into a lathe fixture base S1, rotating the pressing end cover S2, and flattening a pressing spring ring workpiece S3 through threaded connection;

(4) the inner hole of the spring ring workpiece S3 can be bored by pressing the end face hole of the end cover S2;

(5) after boring and processing the inner hole of the spring ring workpiece S3, taking down the pressing end cover S2, and loading the inner hole expanding bush S5 into a lathe clamp base S1;

(6) the pressing end cover S2 is mounted on the lathe fixture base S1 again, after the pressing spring ring workpiece S3 is flattened, a pressing bolt S6 is mounted on the lathe fixture base S1 and presses the inner hole expanding bush S5, the pressing end cover S2 is taken down after the spring ring workpiece S3 is clamped and stabilized, and the end face chamfer of the spring ring workpiece S3 is turned;

(7) after chamfering of one end face, taking down the compression bolt S6, turning around and clamping the spring ring workpiece S3, and repeating the operation of the step (6) to finish chamfering of the other end face of the workpiece;

(8) according to the operation contents of the steps (1) to (7), the inner hole and the chamfers of the two end faces of the spring coil workpiece S3 can be repeatedly machined.

The above embodiments are merely preferred embodiments of the present invention, and do not limit the present invention. The structure of the supporting bushing, the pressing end cover and the pressing bolt can be changed according to actual needs, and persons skilled in the art should understand that any extension and deformation made on the basis of the principle of the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides a turning attachment for spring ring class part bore hole and chamfer which characterized in that: the lathe clamp comprises a lathe clamp base, a pressing end cover and a pressing bolt; a stepped hole is formed in the lathe fixture base along the axis of the lathe fixture base, the stepped hole penetrates through two ends of the lathe fixture base, one end with a small aperture is clamped in a lathe clamping jaw, and a spring ring workpiece is placed in a large aperture; the pressing end cover is provided with a through hole, the aperture of the through hole is consistent with the aperture of the inner hole of the spring ring workpiece, and the pressing end cover is used for pressing the spring ring workpiece in the lathe fixture base to realize the boring positioning of the inner hole of the spring ring workpiece; the compression bolt is arranged in the step hole and used for compressing the inner hole of the spring ring workpiece to realize chamfering, turning and positioning of the spring ring workpiece.

2. The lathe clamp for boring and chamfering of spring ring parts according to claim 1, wherein: an internal thread is arranged on the pressing end cover and matched with an external thread arranged on the lathe fixture base.

3. The lathe clamp for boring and chamfering the spring ring parts according to claim 2, wherein: the outer surface that compresses tightly the end cover is provided with the recess, makes things convenient for operating personnel to rotate and compresses tightly the end cover.

4. The lathe clamp for boring and chamfering of spring ring parts according to claim 1, wherein: the spring ring workpiece support device is characterized by further comprising a support bushing, a through hole is formed in the support bushing, the aperture of the through hole is consistent with that of an inner hole of the spring ring workpiece, one end of the through hole abuts against the end portion of the stepped hole, and the other end of the through hole is in contact with the spring ring workpiece and is used for supporting the spring ring workpiece.

5. The lathe clamp for boring and chamfering of spring ring parts according to claim 1, wherein: still include the hole bush that rises, set up the through-hole that matches with clamp bolt along its axle center, its outside contacts with the spring coil work piece.

6. The lathe clamp for boring and chamfering of spring ring parts according to claim 5, wherein: the through hole is a conical surface of 60 degrees.