CN216151364U

CN216151364U - Spring top open type edge extruding clamp

Info

Publication number: CN216151364U
Application number: CN202122171407.9U
Authority: CN
Inventors: 杨懿; 张文博
Original assignee: Shaanxi Fast Gear Co Ltd
Current assignee: Shaanxi Fast Gear Co Ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-04-01
Anticipated expiration: 2031-09-08

Abstract

The utility model discloses a spring-ejecting type edge extruding clamp which is used for positioning and clamping a machined part and comprises a base and a support body fixedly arranged on the base, wherein a clamp body is arranged in the support body and fixedly connected with the base, a first power assembly and a positioning and clamping assembly are sequentially arranged in the clamp body from bottom to top, the first power assembly is connected with the base, a second power assembly is arranged at the top of the positioning and clamping assembly, a gland and a second mounting seat are sequentially sleeved outside the second power assembly from bottom to top, a tail frame is arranged at the top of the second power assembly, a part to be machined is arranged outside the positioning and clamping assembly and between the gland and the support body, and the first power assembly and the second power assembly move along the axial direction to drive the positioning and clamping assembly to move so as to clamp the part to be machined. The spring-ejecting type edge extruding clamp disclosed by the utility model has the advantages that the automatic processing is realized by matching with a gear hobbing machine conveniently, the positioning and clamping are reliable, the repeated positioning precision is high, and the quick change of the clamps for different batches of products is realized.

Description

Spring top open type edge extruding clamp

Technical Field

The utility model belongs to the technical field of automobile gear processing equipment, a crowded arris anchor clamps of spring open-topped is related to.

Background

The edge extrusion can effectively reduce burrs generated after gear hobbing, avoid the burrs from damaging the tooth surface, reduce stress concentration during gear heat treatment, reduce gear meshing noise to a certain extent, improve the transmission precision of the gear and prolong the service life of the gear. At present, gear manufacturers in China mostly adopt special chamfering machines and have mature clamp schemes. And at the arris extruding station of the gear hobbing machine, because the power of pulling down the machine tool is not available, the typical positioning mode of expansion sleeve tensioning is not easy to realize. The anchor clamps that current company was taken at random bed adopt the optical axis location, are restricted by the structure, are unfavorable for realizing the automation of gear hobbing machine, accomplish automatic unloading of going up, influence continuous processing, and the part of being processed beats greatly and the repeated positioning accuracy is inconsistent, has great processingquality risk.

In the S-series double-intermediate-shaft transmission case produced in batch, a two-shaft-plate gear realizes automatic processing by using a novel dry-type multi-station gear hobbing machine, and a brand-new edge extrusion process is adopted after a gear hobbing process. The optical axis location structure that current crowded arris anchor clamps adopted has following several risks and drawback in the use: because the clearance between the mandrel and the inner hole of the workpiece is not controllable, the mandrel and the inner hole of the workpiece are in fit interference, so that automatic blanking cannot be performed after the machining is finished, the continuous machining is influenced, and even parts are scrapped; the quality problems of uneven edge extrusion depth caused by poor centering effect, large jumping and low repeated positioning precision after the part is clamped due to overlarge gap between the mandrel and the workpiece; and the tooth top is also damaged when the tool is fed due to the outer circle run-out in the tool setting process. In addition, the two-shaft piece gear is various, and a whole set of clamp needs to be replaced according to parts during replacement, so that unnecessary clamp cost and time cost are wasted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a spring top-opening type edge extruding clamp, which aims to solve the problem of part quality caused by uncontrollable gap between a mandrel and a workpiece in the existing edge extruding clamp and avoid factors such as pull-down power and the like in a machine tool edge extruding station.

In order to achieve the purpose, the utility model discloses the following technical scheme:

a spring top-open type edge extruding clamp is used for positioning and clamping a processed part and comprises a base and a support body fixedly arranged on the base, a clamp body is arranged in the support body and fixedly connected with the base, a first power assembly and a positioning and clamping assembly are sequentially arranged in the clamp body from bottom to top, the first power assembly is connected with the base, the top of the positioning and clamping assembly is provided with a second power assembly, the outer part of the second power assembly is sleeved with the gland and the second mounting seat from bottom to top in sequence, the top of the second power assembly is provided with a tail frame, the outer part of the positioning and clamping component, the gland and the support body form a part mounting part to be processed, the first power assembly and the second power assembly move along the axial direction to drive the positioning and clamping assembly to move, so that the part to be machined is clamped;

the positioning and clamping assembly comprises a pull rod arranged in the clamp body and an expansion sleeve clamped on the pull rod, a clamping part is arranged at the top of the pull rod, a groove is formed in the clamping part along the circumferential direction, the expansion sleeve is clamped in the groove, and the inner wall of the expansion sleeve is matched with the conical surface of the outer wall of the clamp body;

the first power assembly comprises a first mounting seat and a first spring, wherein the first mounting seat and the first spring are arranged at the bottom of the first mounting seat in a sleeved mode, the first spring is abutted to the base, the bottom of the pull rod is abutted to the first mounting seat, and the pull rod drives the first power assembly to move along the axial direction to achieve expansion sleeve expansion or contraction.

Specifically, the second power component include pressure head and the second spring of coaxial coupling setting, the pressure head runs through second mount pad and gland, just the lower terminal surface of pressure head surpass the gland the terminal surface with the joint portion butt of pull rod, the upper end of pressure head sets up spacing platform, with the second mount pad slides spacingly.

Preferably, the angle of the conical fit between the inner wall of the expansion sleeve and the outer wall of the clamp body is 30 degrees.

Further, the bottom of first mount pad sets up and is used for spacing boss, the boss with the bottom of anchor clamps body is inconsistent.

Specifically, the upper end surface of the second spring is connected with the tailstock.

Specifically, a flange plate is arranged between the tail frame and the second mounting seat.

Optionally, a gasket is arranged between the pressure head and the second mounting seat.

Furthermore, the support body is fixedly connected with the base through screws, and the clamp body is fixedly connected with the base through screws.

Optionally, the base is fixed on an external machine tool through a base, and the base is connected with the base through a ball plunger.

Compared with the prior art, the utility model has the following beneficial effects:

the spring-ejecting type edge extruding clamp adopts a tensioning mode of adhering the expansion sleeve, solves the problems of poor positioning and centering effects and low repeated positioning precision of the original optical axis, and ensures the effect of an edge extruding process; the requirement of fast changing production is met. The automatic feeding and discharging process of the machine tool in the machining process is facilitated, the repeated positioning precision of the clamp can reach within 0.05mm, and the requirement of part machining is met. The clamp can complete quick production change only by replacing three parts of the expansion sleeve, the support and the gland. The fixture has the advantages of convenient realization of automatic processing by matching with a gear hobbing machine, reliable positioning and clamping, high repeated positioning precision and realization of fixture quick change of products in different batches.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic view of the structure of the clamp of the present invention;

FIG. 2 is a schematic structural view of the positioning and clamping assembly, the clamp body and the first power assembly;

FIG. 3 is a schematic perspective view of the clamp of the present invention;

FIG. 4 is a schematic view of a part configuration;

the reference numerals in the figures denote:

1. a base; 1-1, a ball plunger; 2. a base; 3. a support body; 3-1, a clamp body; 3-1-1, a first mounting cavity; 3-1-2, a second mounting cavity; 4. a first power assembly; 4-1, a first mounting seat; 4-2, a first spring; 4-3, boss; 5. positioning the clamping assembly; 5-1, a pull rod; 5-2, expanding sleeve; 6. a second power assembly; 6-1, pressing head; 6-2, a second spring; 6-3, a gasket; 7. a gland; 8. a second mounting seat; 9. a tailstock; 9-1, a flange plate; 10. a screw; 10-1, and fastening screws.

Detailed Description

It should be noted that, when the present invention is described in terms of orientation, the terms "above", "below", "upper", "lower", "top", "bottom", and the like, indicate orientations and positional relationships, and are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and that "inside" and "outside" refer to the inside and the outside of the corresponding component profile, and the terms should not be construed as limiting the present invention. If the particular gesture changes, the directional indication changes accordingly. In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two unless specifically defined otherwise. In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

The edge extrusion clamp adopts the floating gland to tightly press the center of the machine tool, and controls the expansion and the release of the expansion sleeve through the elastic force difference of the rectangular springs at the two ends of the clamp, so as to realize the positioning and the clamping of the processed part. The fixture has the advantages of convenient realization of automatic processing by matching with a gear hobbing machine, reliable positioning and clamping, high repeated positioning precision and realization of fixture quick change of products in different batches.

Example 1

With reference to the accompanying drawings, the embodiment provides a spring-ejecting type edge extrusion clamp for positioning and clamping a machined part, which comprises a base 2 and a support body 3 fixedly arranged on the base 2, wherein a clamp body 3-1 is arranged inside the support body 3, the clamp body 3-1 is fixedly connected with the base 2, a first power assembly 4 and a positioning and clamping assembly 5 are sequentially arranged inside the clamp body 3-1 from bottom to top, the first power assembly 4 is connected with the base 2, a second power assembly 6 is arranged at the top of the positioning and clamping assembly 5, a gland 7 and a second mounting seat 8 are sequentially sleeved outside the second power assembly 6 from bottom to top, a tail frame 9 is arranged at the top of the second power assembly 6, a part to be machined is formed between the outside of the positioning and clamping assembly 5, the gland 7 and the support body 3, the first power assembly 4 and the second power assembly 6 move along the axial direction to drive the positioning and clamping assembly 5 to move, further realizing the clamping of the processed part;

the positioning and clamping assembly 5 comprises a pull rod 5-1 arranged inside the clamp body 3-1 and an expansion sleeve 5-2 clamped on the pull rod 5-1, the top of the pull rod 5-1 is provided with a clamping part, a groove (not marked in the figure) is arranged on the clamping part along the circumferential direction, the expansion sleeve 5-2 is clamped in the groove, and the inner wall of the expansion sleeve 5-2 is matched with the conical surface of the outer wall of the clamp body 3-1; in the embodiment, a first installation cavity 3-1-1 and a second installation cavity 3-1-2 are communicated with the interior of the clamp body 3-1, the first installation cavity 3-1-1 is used for arranging a positioning and clamping assembly 5, namely a pull rod 5-1 and an expansion sleeve 5-2, and the second installation cavity 3-1-2 is used for installing a first power assembly 4. The inner diameter of the first installation cavity 3-1-1 is smaller than that of the second installation cavity 3-1-2.

The clamp adopts a structure that the expansion sleeve 5-2 with larger expansion amount is expanded, the clearance between the expansion sleeve 5-2 and the inner hole of the processed part can reach (-0.5, -0.2) mm, the automatic loading and unloading process of a machine tool in the processing process is facilitated, the repeated positioning precision of the clamp can reach within 0.05mm, and the requirement of part processing is met.

The first power assembly 4 comprises a first mounting seat 4-1 and a first spring 4-2, wherein the first mounting seat 4-1 is attached to the bottom end inside the clamp body 3-1, the first spring 4-2 is sleeved at the bottom of the first mounting seat 4-1, the first spring 4-2 is abutted against the base 2, the bottom of the pull rod 5-1 is abutted against the first mounting seat 4-1, and the pull rod 5-1 moves along the axial direction to drive the first power assembly 4 to move so as to realize expansion or contraction of the expansion sleeve 5-2.

Specifically, the second power assembly 6 comprises a pressure head 6-1 and a second spring 6-2 which are coaxially connected, the pressure head 6-1 penetrates through the second mounting seat 8 and the gland 7, the lower end face of the pressure head 6-1 exceeds the end face of the gland 7 and is abutted to the clamping portion of the pull rod 5-1, and the upper end of the pressure head 6-1 is provided with a limiting table which is limited by the second mounting seat 8 in a sliding manner.

In this embodiment, the height difference between the pressing cover 7 and the pressing head 6-1 is 6.5mm, during the pressing process of the tailstock 9, due to the height difference, the pressing head 6-1 firstly touches the positioning and clamping assembly 5 consisting of the expansion sleeve 5-2 and the pull rod 5-1, the expansion sleeve 5-2 moves downwards along the conical surface matched with the clamp body 3-1, the expansion sleeve 5-2 is expanded through the spring force generated by the second spring 6-2 to clamp the workpiece, meanwhile, the second spring 6-2 is compressed under the action of the pull rod 5-1 and the first mounting seat 4-1, and after the workpiece is clamped, the pressing cover 7 also compresses the workpiece under the power of the tailstock 9. This process achieves the positioning and clamping of the workpiece. After the extrusion processing of the part is finished, the tail frame 9 is loosened, the expansion sleeve 5-2 moves upwards under the action of the spring force of the compressed first spring 4-2, and the workpiece is loosened.

In order to meet the force of the expanding sleeve 5-2, the first spring 4-2 and the second spring 6-2 which are selected in the clamp are both rectangular springs which are comfortable and can reach high rigidity, the power of a machine tool tailstock 9 is utilized, the rigidity of the second spring 6-2 (an overload spring) is larger than that of the first spring 4-2 (a heavy load spring) through the pressure difference of the first spring 4-2 and the second spring 6-2, and the expanding and the releasing of the clamp are realized. Preferably, the angle of conical fit between the inner wall of the expansion sleeve 5-2 and the outer wall of the clamp body 3-1 is 30 degrees.

In this embodiment, the first mounting seat 4-1 is also a spring mounting seat. The bottom end of the first mounting seat 4-1 is provided with a boss 4-3 for limiting, and the boss 4-3 is abutted against the bottom of the clamp body 3-1. The top of the first mounting seat 4-1 is abutted against the bottom surface of the first mounting cavity 3-1-1; this limits the displacement of the first mounting seat 4-1 with respect to the upward movement of the jig body 3-1, while the bottom surface of the first mounting seat 4-1 abuts against the support body 3 when moving downward.

Further, the upper end face of the second spring 6-2 is connected with the tail frame 9. And in the relaxed state of the second spring 6-2, the upper end surface of the second spring 6-2 extends out of the second mounting seat 8.

Specifically, a flange 9-1 is arranged between the tail frame 9 and the second mounting seat 8. The flange 9-1 is provided for connecting and fixing the tailstock 9 and the second mounting seat 8, and the second power assembly 6 is mounted in the second mounting seat 8.

Optionally, a gasket 6-3 is arranged between the pressure head 6-1 and the second mounting seat 8. The axial distance between the pressure head 6-1 and the gland 7 after assembly is ensured to be a certain fixed value through the thickness of the wear-matching gasket 6-3.

Further, the support body 3 and the base 2, and the clamp body 3-1 and the base 2 are fixedly connected through screws 10. Meanwhile, the flange 9-1 and the tail frame 9, and the flange 9-1 and the second mounting seat 8 are fixed through screws 10.

Optionally, the base 2 is fixed on an external machine tool through the base 1, and the base 2 is connected with the base 1 through the ball plunger 1-1. In addition, the base 2 and the base 1 are fixed by a set screw 10-1.

The gland 7 is installed in a mode of a set screw 10-1, so that the floating function is realized, and the gland 7 can well compress a workpiece.

In order to meet the requirement of quick production change, the spring top-opening type edge extrusion clamp only needs to replace three parts, namely the expansion sleeve 5-2, the support body 3 and the gland 7.

In conclusion, the spring top-open type edge extruding clamp disclosed by the utility model has the following working process:

1. when the clamp is integrally installed and debugged, the base 1 is fixedly installed on a machine tool and is not moved, the clamp can be integrally installed on the base 1, and the rotation precision of the clamp can meet the use requirement by adjusting the ball plunger 1-1 arranged on the side face.

2. After the gear hobbing process is finished, the machine tool automatically places the machined part on the support body 3 of the clamp through the rotation of the mechanical arm.

3. The oil cylinder of the machine tool tailstock 9 acts, because the end face of the pressure head 6-1 exceeds the end face of the gland 7, the pressure head 6-1 firstly contacts the pull rod 5-1 and then the second spring 6-2 is compressed, the pull rod 5-1 simultaneously drives the first mounting seat 4-1 to compress the first spring 4-2 at the lower end, and the expansion sleeve 5-2 expands the expansion sleeve 5-2 through the matching with the conical surface of the clamp body 3-1 by the force generated by the pressure difference of the upper rectangular spring and the lower rectangular spring, so that the clamping of a workpiece is realized.

4. With the continuous compression of the spring and the pressing of the tail frame 9, the pressing cover 7 simultaneously presses the workpiece after the expansion sleeve 5-2 expands.

5. The positioning and clamping process of the workpiece is completed, and the chamfering process can be carried out.

6. After the machining is finished, the tail frame 9 rises, the first spring 4-2 at the lower end of the clamp releases force, and in the process that the compressed state is changed into the original length, the expansion sleeve 5-2 is jacked up and loosened, so that a mechanical arm can conveniently grab the machined part, and the machining process is finished.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A spring-ejecting type edge extruding clamp is used for positioning and clamping a machined part and comprises a base (2) and a support body (3) fixedly arranged on the base (2), and is characterized in that a clamp body (3-1) is arranged in the support body (3), the clamp body (3-1) is fixedly connected with the base (2), and a first power assembly (4) and a positioning and clamping assembly (5) are sequentially arranged in the clamp body (3-1) from bottom to top;

the first power assembly (4) is connected with the base (2), the second power assembly (6) is arranged at the top of the positioning and clamping assembly (5), the pressing cover (7) and the second mounting seat (8) are sequentially sleeved on the outer portion of the second power assembly (6) from bottom to top, the tail frame (9) is arranged at the top of the second power assembly (6), a machined part mounting portion is formed among the outer portion of the positioning and clamping assembly (5), the pressing cover (7) and the supporting body (3), and the first power assembly (4) and the second power assembly (6) move along the axial direction to drive the positioning and clamping assembly (5) to move so as to clamp a machined part;

the positioning and clamping assembly (5) comprises a pull rod (5-1) arranged inside the clamp body (3-1) and an expansion sleeve (5-2) clamped on the pull rod (5-1), the top of the pull rod (5-1) is provided with a clamping part, a groove is formed in the clamping part along the circumferential direction, the expansion sleeve (5-2) is clamped in the groove, and the inner wall of the expansion sleeve (5-2) is matched with the conical surface of the outer wall of the clamp body (3-1);

the first power assembly (4) comprises a first mounting seat (4-1) and a first spring (4-2) which is arranged at the bottom of the first mounting seat (4-1) in a sleeved mode, wherein the first mounting seat (4-1) and the first spring (4-2) are arranged at the bottom of the first mounting seat (4-1) in a sleeved mode, the first spring (4-2) is connected with the base (2) in a abutted mode, the bottom of the pull rod (5-1) is connected into the first mounting seat (4-1) in a abutted mode, and the pull rod (5-1) drives the first power assembly (4) to move along the axial direction to achieve expansion or contraction of the expansion sleeve (5-2).

2. The spring top open type arris extrusion clamp of claim 1, wherein the second power assembly (6) comprises a pressure head (6-1) and a second spring (6-2) which are coaxially connected, the pressure head (6-1) penetrates through the second mounting seat (8) and the pressure cover (7), the lower end face of the pressure head (6-1) exceeds the end face of the pressure cover (7) to abut against the clamping portion of the pull rod (5-1), and the upper end of the pressure head (6-1) is provided with a limit table to limit the sliding of the second mounting seat (8).

3. The spring-ejecting type prism extrusion jig according to claim 1, wherein the angle of conical fit between the inner wall of the expansion sleeve (5-2) and the outer wall of the jig body (3-1) is 30 °.

4. The spring top-open type prism extrusion clamp as claimed in claim 2, wherein a boss (4-3) for limiting is arranged at the bottom end of the first mounting seat (4-1), and the boss (4-3) is abutted against the bottom of the clamp body (3-1).

5. The spring-top edge extrusion jig according to claim 4, wherein the upper end surface of the second spring (6-2) is connected with the tailstock (9).

6. The spring-top edge extrusion clamp according to claim 5, wherein a flange (9-1) is arranged between the tailstock (9) and the second mounting seat (8).

7. The spring-ejecting type arris-extruding jig according to claim 2, wherein a gasket (6-3) is provided between the ram (6-1) and the second mounting seat (8).

8. The spring-ejecting type prism extrusion jig according to claim 1, wherein the support body (3) and the base (2) and the jig body (3-1) and the base (2) are fixedly connected by a screw (10).

9. The spring-ejecting type prism extrusion jig according to claim 1, wherein the base (2) is fixed on an external machine tool through a base (1), and the base (2) and the base (1) are connected by a ball plunger (1-1).