CN111804942B

CN111804942B - Clamping tool in separating

Info

Publication number: CN111804942B
Application number: CN202010586456.6A
Authority: CN
Inventors: 韦雪凯; 黄泳华
Original assignee: Yingnuo Laibi Beijing Technology Co ltd
Current assignee: Yingnuo Laibi Beijing Technology Co ltd
Filing date: 2020-06-24
Publication date: 2024-07-02
Anticipated expiration: 2040-06-24

Abstract

The invention provides a split clamping tool, relates to the technical field of clamping devices, and solves the technical problems that a universal clamp cannot rapidly position and clamp a workpiece and the whole height of the universal clamp is high, so that the machining space of a machine tool is affected. The middle clamping tool comprises a base, a rotating plate, a top plate, a clamping assembly and a handle, wherein the base is provided with an accommodating groove on the upper portion, the rotating plate is arranged in the accommodating groove, the top plate is fixedly connected with the base, the clamping assembly is used for being abutted against a workpiece, the handle is fixedly connected with the rotating plate, a plurality of first guide grooves are formed in the rotating plate, the first ends of the first guide grooves are all close to the edge of the rotating plate, and the second ends of the first guide grooves are all circumferentially and gradually curved to extend towards the direction close to the central axis of the rotating plate. The top plate comprises a platform and a plurality of second guide grooves which are radially arranged along the top plate, a plurality of clamping assemblies are respectively arranged in the second guide grooves, the lower parts of the clamping assemblies can be slidably clamped into the corresponding first guide grooves, and the self-centering clamping device is used for rapidly clamping a workpiece in a self-centering part.

Description

Clamping tool in separating

Technical Field

The invention relates to the technical field of clamping devices, in particular to a split clamping tool.

Background

In the CNC machining process, most workpieces are required to be subjected to flatter, centering and clamping procedures on a base, and the work is repeated and error-prone, and also affects the effective machining time of CNC machining. Currently, universal clamps on the market, such as a vice, a self-centering vice, a four-jaw chuck and the like, cannot well solve the problem of rapidly positioning and clamping workpieces in all directions, or are too high in cost. In addition, the existing four-jaw chuck needs to clamp a workpiece by screwing, and the overall height of the chuck is high, so that the machining space of a machine tool is affected.

Therefore, how to solve the technical problems that the universal fixture in the prior art can not rapidly position and clamp the workpiece and the whole height thereof is high, and the processing space of a machine tool is affected has become an important technical problem to be solved by the person in the field.

Disclosure of Invention

The invention aims to provide a centering clamping tool, which solves the technical problems that a universal clamp in the prior art cannot rapidly position and clamp a workpiece and the whole height is high, so that the machining space of a machine tool is affected. The preferred technical solutions of the technical solutions provided by the present invention can produce a plurality of technical effects described below.

In order to achieve the above purpose, the present invention provides the following technical solutions:

The invention provides a centering clamping tool, which comprises: a base with an accommodating groove at the upper part and an operating groove at the side wall; the rotary plate is rotatably arranged in the accommodating groove, a plurality of first guide grooves are formed in the upper portion of the rotary plate and are arranged along the circumferential direction of the rotary plate, first ends of the first guide grooves are close to the edge of the rotary plate, and second ends of the first guide grooves extend in the circumferential direction of the rotary plate and gradually extend in the direction close to the central axis of the rotary plate in a curved way; the top plate is covered on the upper part of the accommodating groove and fixedly connected with the base, and comprises a platform which is arranged at the middle part of the top plate and is used for placing a workpiece, and a plurality of second guide grooves which are arranged along the radial direction of the top plate; the clamping assembly is arranged in the second guide groove and used for abutting against the workpiece, the lower part of the clamping assembly is clamped into the first guide groove, and the clamping assembly and the first guide groove can slide relatively; the free end of the handle penetrates through and extends out of the operation groove; when the handle drives the rotating plate to rotate to a first position, the clamping assemblies slide inwards along the second guide grooves to the second ends of the first guide grooves, and the clamping assemblies are abutted with a workpiece; when the handle drives the rotating plate to reversely rotate to the second position, the clamping assemblies outwards slide to the first ends of the first guide grooves along the second guide grooves, and the clamping assemblies are far away from the workpiece.

Preferably, the first guide groove, the second guide groove and the clamping assembly are arranged in a one-to-one correspondence manner in groups, and the clamping assemblies are respectively arranged in a pair mode and a pair mode along the X-axis and the Y-axis.

Preferably, the clamping assembly comprises a sliding block arranged in the second guide groove, a pressing plate fixedly arranged on the upper portion of the sliding block and used for being abutted against a workpiece, and a pin shaft penetrating through the sliding block and the pressing plate and then being clamped into the first guide groove.

Preferably, the upper surface of the platform is a finish grinding surface, and the flatness of the finish grinding surface is equal to or less than 0.005 mm.

Preferably, the platform is a square boss integrally formed with the top plate and protruding upwards from the top plate.

Preferably, the second guide groove is an open groove, one of the side wall of the sliding block and the side wall of the second guide groove is provided with a protruding portion, and the other is provided with a concave portion for the protruding portion to extend into.

Preferably, the end of the pressing plate, which is close to the workpiece, extends outwards out of the side part of the sliding block, and a plurality of grooves are formed in the side wall of the pressing plate.

Preferably, the connection between the base and the top plate and the connection between the pressing plate and the sliding block are detachable.

Preferably, the connection between the handle and the rotating plate is a detachable connection.

Preferably, the platform, the rotating plate and the base are all provided with through holes which are communicated and used for processing workpieces.

The invention provides a centering clamping tool which comprises a base, a rotating plate, a top plate, a clamping assembly and a handle, wherein a first guide groove and a second guide groove are respectively arranged on the rotating plate and the top plate, and a user can firstly and fixedly install the centering clamping tool on a base station integrally, and place a workpiece to be processed on a platform of the top plate so as to set a zero point in the vertical Z-axis direction. During the use, the user can rotate the handle to when making the handle drive the rotor plate rotate to the first position, press from both sides tight position promptly, press from both sides the clamping assembly and all inwards slide to the second end of first guide way along the second guide way, promptly because the existence of first guide way, the rotor plate rotates and carries out rectilinear motion with driving the clamping assembly along the second guide way, so that a plurality of clamping assemblies all are close to platform department in step, thereby make a plurality of clamping assemblies all exert the thrust to the work piece in corresponding direction and support tightly, carry out X axle direction and Y axle direction self-centering to the work piece promptly, in order to carry out subsequent CNC processing. After the processing is finished, the user can reversely rotate the handle to when the handle drives the rotating plate to the second position, namely, the position is released, the clamping assemblies all slide outwards to the first end of the first guide groove along the second guide groove, and the clamping assemblies are far away from the workpiece to release the workpiece. The invention can clamp the workpiece by a mode of holding the handle by a user, can automatically center the workpiece in the XY direction and automatically fix the zero position in the Z direction, can conveniently clamp a blank or a finished aluminum part in a positioning manner, simplifies the earlier stage work of CNC processing, has a simple structure and small thicknesses of the base and the top plate, reduces the overall height of the invention, has low cost, and solves the technical problems that the universal fixture in the prior art can not rapidly clamp the workpiece in a positioning manner and has high overall height, and the processing space of a machine tool is influenced.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of a centering clamping tool provided by an embodiment of the invention;

FIG. 2 is a schematic diagram of the lower part of the centering clamping tool provided by the embodiment of the invention;

FIG. 3 is a cross-sectional view of a split clamping tool provided by an embodiment of the invention;

Fig. 4 is an exploded view of the centering clamping tool provided by the embodiment of the invention.

1-A base in the figure; 2-rotating plate; 3-top plate; 4-a clamping assembly; 5-a handle; 6-an accommodating groove; 7-an operation groove; 8-a first guide groove; 9-a platform; 10-a second guide groove; 11-a workpiece; 12-a slider; 13-pressing plates; 14-pin shafts; 15-a boss; 16-recesses; 17-grooves; 18-through holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.

The invention aims to provide a centering clamping tool, which solves the technical problems that a universal clamp in the prior art cannot rapidly position and clamp a workpiece and the whole height is high, so that the machining space of a machine tool is affected.

Hereinafter, embodiments will be described with reference to the drawings. Furthermore, the embodiments shown below do not limit the summary of the invention described in the claims. The whole contents of the constitution shown in the following examples are not limited to the solution of the invention described in the claims.

Referring to fig. 1-4, the invention provides a centering clamping tool, which comprises a base 1, a rotating plate 2, a top plate 3, a clamping assembly 4 and a handle 5, wherein an accommodating groove 6 with a circular cross section profile is formed in the upper part of the base 1 and is used for installing and placing the rotating plate 2, and the two parts can rotate relatively. The side wall of the base 1 is provided with a strip-shaped operation groove 7 for a user to rotate the handle 5 to drive the rotating plate 2 to rotate. The rotating plate 2 is rotatably arranged in the accommodating groove, the outer diameter of the rotating plate 2 is equal to or slightly smaller than the inner diameter of the accommodating groove 6, a plurality of first guide grooves 8 are arranged at the upper part of the rotating plate 2, the plurality of first guide grooves 8 are uniformly distributed along the circumferential direction of the rotating plate 2, the first end of any first guide groove 8 is arranged near the edge position of the rotating plate 2, the second end of any first guide groove 8 extends along the circumferential direction of the rotating plate 2 and gradually extends towards the direction near the central axis of the rotating plate 2, namely, the first guide groove 8 can be an arc-shaped groove structure with gradually increased curvature so as to guide and position the clamping assembly 4, the shape of the plurality of first guide grooves 8 and the positions relative to the center and the edge of the rotating plate 2 are the same, So as to align the movement of the plurality of clamping assemblies 4. The top plate 3 covers the upper part of the accommodating groove 6 and is fixedly connected with the bottom plate so as to be buckled with the bottom plate, and the rotating plate 2 has the functions of limiting and preventing falling. The top plate 3 comprises a platform 9 and a plurality of second guide grooves 10, wherein the platform 9 is fixedly arranged at the middle position of the top plate 3 and used for placing a workpiece 11. The second guide groove 10 may be a linear groove provided in the radial direction of the top plate 3 to provide a guide function for the clamping assembly 4 toward or away from the platform 9. The clamping component 4 is arranged in the second guide groove 10 and can slide along the length direction of the second guide groove 10, the width of the clamping component 4 is equal to or slightly smaller than that of the second guide groove 10, the lower part of the clamping component 4 is clamped into the first guide groove 8, and the clamping component 4 can also slide along the length contour direction of the first guide groove 8 so as to be in butt joint with the workpiece 11. The handle 5 is fixedly connected with the rotating plate 2, and the free end of the handle penetrates through and extends out of the operating groove 7 for being held and operated by a user. So arranged, a user can firstly and fixedly install the invention on the base station, and put the workpiece 11 to be processed on the platform 9 of the top plate 3 so as to set the zero point in the vertical Z-axis direction. The Z-axis direction refers to a vertical direction perpendicular to the upper surface of the stage 9, and the X-axis and Y-axis directions refer to two directions perpendicular to each other in which the upper surface of the stage 9 extends at its center position. During the use, the user can rotate handle 5 to when making handle 5 drive rotor plate 2 rotate to the first position, press from both sides tight position promptly, clamp assembly 4 all inwards slides to the second end of first guide way 8 along second guide way 10, promptly because the existence of first guide way 8, rotor plate 2 rotates and carries out rectilinear motion with drive clamp assembly 4 along second guide way 10, so that a plurality of clamp assemblies 4 all are close to in step 9 departments, thereby make a plurality of clamp assemblies 4 all exert the thrust to work piece 11 in corresponding direction and support tightly, promptly carry out X axle direction and Y axle direction automatic centering to work piece 11, in order to carry out subsequent CNC processing. After the processing is completed, the user can reversely rotate the handle 5, so that when the handle 5 drives the rotating plate 2 to the second position, namely, the loosening position, the clamping assemblies 4 slide outwards along the second guide grooves 10 to the first ends of the first guide grooves 8, and the clamping assemblies 4 are far away from the workpiece 11 to loosen the workpiece 11. The invention can clamp the workpiece 11 by a mode that a user holds the handle 5, can automatically center the workpiece 11 in the XY direction and automatically fix the zero position in the Z direction, can conveniently position and clamp blanks or finished aluminum pieces, simplifies the earlier work of CNC processing, has simple structure, only needs to accommodate the rotating plate 2 between the base 1 and the top plate 3, has small thickness, reduces the whole height of the invention, has low cost, and solves the technical problems that the universal fixture in the prior art can not quickly position and clamp the workpiece 11 and has high whole height, and the processing space of a machine tool is influenced.

As an alternative implementation manner of the embodiment of the present invention, the first guide groove 8, the second guide groove 10 and the clamping assembly 4 are arranged in a one-to-one correspondence manner, preferably, the first guide groove 8, the second guide groove 10 and the clamping assembly 4 are arranged in a group, and four groups of the clamping assembly 4 are respectively arranged in pairs along the X axis and the Y axis so as to respectively and synchronously clamp the X axis direction and the Y axis direction of the workpiece 11.

As an alternative implementation manner of the embodiment of the invention, the clamping assembly 4 comprises a sliding block 12, a pressing plate 13 and a pin shaft 14, the sliding block 12 is slidably arranged in the second guide groove 10, the pressing plate 13 is fixedly connected to the upper part of the sliding block 12 and is used for being abutted against the workpiece 11, the pin shaft 14 penetrates through the sliding block 12 and the pressing plate 13 and then is clamped into the first guide groove 8, namely, the sliding block 12 and the pressing plate 13 are vertically provided with through holes 18 for the pin shaft 14 to penetrate through, the diameter of the pin shaft 14 can be equal to or slightly smaller than the width of the first guide groove 8, optionally, the side wall of the first guide groove 8 close to the second end can be provided with a rubber sheet so as to enhance the friction force and clamping force between the pin shaft 14 and the side wall of the first guide groove 8, or the width between the side wall of the first guide groove 8 close to the second end can be gradually reduced, and a transversely concave clamping groove is arranged at the second end position of the pin shaft 14 so as to further strengthen the friction force and the clamping force between the pin shaft 14 and the first guide groove 8, and the side wall of the first guide groove 8 can be clamped into the clamping force between the side walls and the side wall of the first guide groove 14 and the side wall of the second guide groove 8, and the side wall of the first guide groove 8 close to the side wall is not close to the second guide groove 8 and the second guide groove 8, and the side wall is convenient to the side to move along the first guide groove 12 and the side position of the first guide groove 11 and the side groove, and the side is far away from the center groove 11.

Further, the upper surface of the platform 9 is a finish grinding surface, and the flatness of the finish grinding surface is equal to or less than 0.005 mm, so that the zero point position of the workpiece 11 in the Z direction is further accurate, and the machining precision of the workpiece 11 is improved.

Further, the platform 9 is a square boss integrally formed with the top plate 3 and protruding upwards from the top plate 3, that is, the X-axis direction and the Y-axis direction can be along the length direction and the width direction of the platform 9, so that a user can easily identify the position of the platform 9, and then place the workpiece 11.

Further, the second guide groove 10 is an open groove to facilitate the installation of the clamping assembly 4. One of the side walls of the sliding block 12 and the side wall of the second guiding groove 10 is provided with a protruding portion 15, the other is provided with a recessed portion 16 for the protruding portion 15 to extend in, and the protruding portion 15 and the recessed portion 16 are of strip-shaped structures so as to guide and limit the sliding block 12 to move along the second guiding groove 10.

Further, the end of the pressing plate 13 near the workpiece 11 protrudes outwards from the side of the slide block 12, that is, only the side wall of the end of the pressing plate 13 abuts against the workpiece 11, the side wall of the pressing plate 13 is provided with a plurality of grooves 17, and the grooves 17 can be but are not limited to strip-shaped grooves, so that the contact area between the clamping assembly 4 and the workpiece 11 can be reduced, and machining errors caused by insufficient flatness of a contact plane can be reduced.

Further, the connection between the base 1 and the top plate 3 and the connection between the pressing plate 13 and the sliding block 12 are all detachable connections, and the connection can be, but not limited to, screw connection, convenient installation and connection, and convenient maintenance and replacement of all parts.

As an alternative implementation of the embodiment of the invention, the connection between the handle 5 and the rotating plate 2 is a detachable connection, which can be, but not limited to, a threaded connection, is convenient to install, and when the handle 5 is clamped or unclamped in place, the user can detach the handle 5 to avoid the interference of the handle with other devices.

As an alternative implementation of the embodiment of the present invention, the platform 9, the rotating plate 2 and the base 1 are all provided with vertical through holes 18 which are communicated with each other and are used for processing the workpiece 11, such as drilling the middle part of the workpiece 11. Optionally, an annular extension may be disposed at the lower portion of the rotating plate 2 and may extend into the through hole 18 of the base 1, so as to further improve the coaxiality of the rotating plate 2 and the base 1.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. Clamping frock in dividing, its characterized in that includes:

a base (1) with an accommodating groove (6) at the upper part and an operating groove (7) at the side wall;

The rotary plate (2) is rotatably arranged in the accommodating groove (6), a plurality of first guide grooves (8) are formed in the upper portion of the rotary plate, the first ends of the first guide grooves (8) are close to the edge of the rotary plate (2), and the second ends of the first guide grooves extend in the circumferential direction of the rotary plate (2) and gradually extend in the direction close to the central axis of the rotary plate (2) in a curved manner;

The top plate (3) is covered on the upper part of the accommodating groove (6) and is fixedly connected with the base (1), and comprises a platform (9) which is arranged at the middle position of the top plate and is used for placing a workpiece (11) and a plurality of second guide grooves (10) which are arranged along the radial direction of the top plate;

A clamping assembly (4) which is arranged in the second guide groove (10) and is used for abutting with the workpiece (11), wherein the lower part of the clamping assembly is clamped into the first guide groove (8) and the clamping assembly and the first guide groove can slide relatively;

a handle (5) fixedly connected with the rotating plate (2), and the free end of the handle penetrates through and extends out of the operation groove (7);

When the handle (5) drives the rotating plate (2) to rotate to a first position, the clamping assemblies (4) slide inwards to the second end of the first guide groove (8) along the second guide groove (10), and the clamping assemblies (4) are abutted with the workpiece (11); when the handle (5) drives the rotating plate (2) to reversely rotate to a second position, the clamping assemblies (4) slide outwards along the second guide grooves (10) to the first ends of the first guide grooves (8), and the clamping assemblies (4) are far away from the workpiece (11);

The first guide grooves (8), the second guide grooves (10) and the clamping assemblies (4) are arranged in a one-to-one correspondence manner in groups, and the clamping assemblies (4) are arranged in a pair-to-pair manner along the X-axis and the Y-axis respectively;

the clamping assembly (4) comprises a sliding block (12) arranged in the second guide groove (10), a pressing plate (13) fixedly arranged at the upper part of the sliding block (12) and used for being abutted against the workpiece (11), and a pin shaft (14) penetrating through the sliding block (12) and the pressing plate (13) and then being clamped into the first guide groove (8);

The second guide groove (10) is an open groove, one of the side wall of the sliding block (12) and the side wall of the second guide groove (10) is provided with a protruding portion (15), and the other is provided with a concave portion (16) for the protruding portion (15) to extend into.

2. The centering and clamping tool according to claim 1, wherein the upper surface of the platform (9) is a finish grinding surface with a flatness of 0.005 mm or less.

3. The centering clamping tool according to claim 2, wherein the platform (9) is a square boss integrally formed with the top plate (3) and protruding upwards from the top plate (3).

4. The centering clamping tool according to claim 1, wherein the end of the pressing plate (13) close to the workpiece (11) extends outwards out of the side part of the sliding block (12), and the side wall of the pressing plate (13) is provided with a plurality of grooves (17).

5. The centering clamping tool according to claim 1, wherein the connection between the base (1) and the top plate (3) and the connection between the pressing plate (13) and the sliding block (12) are detachable connections.

6. The centering clamping fixture according to claim 1, characterized in that the connection between the handle (5) and the rotating plate (2) is a detachable connection.

7. The centering clamping tool according to claim 1, wherein the platform (9), the rotating plate (2) and the base (1) are provided with through holes (18) which are communicated and used for processing a workpiece (11).