CN218891452U

CN218891452U - Vacuum suction positioning fixture

Info

Publication number: CN218891452U
Application number: CN202222917826.7U
Authority: CN
Inventors: 刘波
Original assignee: Suzhou Wanda Precision Technology Co ltd
Current assignee: Suzhou Wanda Precision Technology Co ltd
Priority date: 2022-11-02
Filing date: 2022-11-02
Publication date: 2023-04-21
Anticipated expiration: 2032-11-02

Abstract

The utility model relates to a vacuum suction positioning clamp which is provided with a base and a placing plate, wherein the placing plate is arranged on the upper side of the base, and vacuum suction grooves are arranged on the upper surface of the placing plate at equal intervals along the length direction of the base; the upper surface of the placing plate is fixedly provided with a rubber ring around the port of the vacuum suction groove, the inner walls of the two sides of the vacuum suction groove along the length direction of the base are respectively provided with a communication hole, a one-way valve A is arranged in the communication hole on one side, and a one-way valve B is arranged in the communication hole on the other side; the flow guiding directions of the one-way valve A and the one-way valve B are opposite; air passages are vertically arranged in the placement plate and below the vacuum suction grooves respectively, and the communication holes are communicated in the air passages; the base is internally provided with a vacuum device, and the vacuum suction groove is internally provided with a negative pressure vacuum effect through the vacuum device. The clamping device replaces the traditional clamping or locking mode by bolts, so that the situation that the surface of a workpiece is damaged by excessive clamping extrusion force is avoided, the workpiece clamping and canceling process is convenient and quick, and the machining efficiency is improved.

Description

Vacuum suction positioning fixture

Technical Field

The utility model relates to the technical field of clamps, in particular to a vacuum suction positioning clamp.

Background

In the processing manufacturing industry, the workpiece is often required to be milled, and when the workpiece is milled, the workpiece is required to be fixed on a processing platform by using a clamp, so that the defect that a processed product is unqualified due to the fact that the workpiece moves in the processing process is avoided, and after the workpiece is processed, the workpiece is taken down again, and the processing of the next workpiece is continued.

Part work piece anchor clamps that exist on the market at present carry out centre gripping fixed or come fixed part through the locking screw with the work piece through the clamping jaw, and excessive clamping force or extrusion force act on the work piece and can harm the work piece surface, and this kind of clamping mode is comparatively loaded down with trivial details simultaneously, consumes longer time when the work piece is got the blowing, reduces machining efficiency.

Disclosure of Invention

The utility model aims to provide a high-efficiency vacuum suction positioning fixture.

In order to achieve the above purpose, the present utility model provides the following technical solutions.

The vacuum sucking positioning fixture comprises a base and a placing plate, wherein the placing plate is arranged on the upper side of the base, and vacuum sucking grooves are arranged on the upper surface of the placing plate at equal intervals along the length direction of the base; the upper surface of the placing plate is fixedly provided with a rubber ring around the port of the vacuum suction groove, the inner walls of the two sides of the vacuum suction groove along the length direction of the base are respectively provided with a communication hole, a one-way valve A is arranged in the communication hole on one side, and a one-way valve B is arranged in the communication hole on the other side; the flow guiding directions of the one-way valve A and the one-way valve B are opposite; air passages are vertically arranged in the placement plate and below the vacuum suction grooves respectively, and the communication holes are communicated in the air passages; the base is internally provided with a vacuum device, and the vacuum suction groove is internally provided with a negative pressure vacuum effect through the vacuum device.

Therefore, the bottom surface of the workpiece is attached to the locating pin, the vacuum device is used for sucking negative pressure between the vacuum suction groove and the bottom surface of the workpiece under the flow guiding action of the air passage and the communication hole, so that the workpiece is firmly held above the holding plate, the workpiece is fixed, the traditional clamping or bolt locking mode is replaced, the situation that the surface of the workpiece is damaged due to excessive clamping extrusion force is avoided, the rubber ring is tightly attached to the lower surface of the workpiece, the sealing effect is improved, after the processing is finished, the vacuum negative pressure in the vacuum suction groove is canceled through the vacuum device, the workpiece can be taken down, the workpiece clamping and the canceling process are convenient and quick, and the processing efficiency is improved.

Further, a built-in cavity with an open upper end is arranged in the base; the vacuum device comprises a vacuum generator respectively fixed in the built-in cavity and a connecting conduit respectively connected with the vacuum generator; the top end of the connecting catheter correspondingly penetrates into the airway and is communicated with the airway.

Through the cooperation of the vacuum generator and the compressor, the vacuum effect can be conveniently realized in the vacuum suction groove under the flow guiding effect of the connecting guide pipe, the air passage and the communication hole, thereby being convenient for sucking the workpiece on the placement plate in vacuum.

Further, the flow guiding direction of the one-way valve A is guided into the vacuum suction groove by the air passage, and the flow guiding direction of the one-way valve B is guided into the air passage by the vacuum suction groove.

Because the flow guiding directions of the one-way valve A and the one-way valve B are opposite, in the vacuum sucking process, air in the vacuum sucking groove can be sucked into the air passage through the communication hole, so that the vacuum negative pressure effect of stars in the vacuum sucking groove is facilitated, and when the material is taken, air in the air passage can be guided into the vacuum sucking groove through the communication hole, so that the air pressure in the vacuum sucking groove is balanced with the external air pressure, the holding force on a workpiece is eliminated, and the workpiece is convenient to take down.

Further, the communicating hole is a transverse J shape, and the port of the communicating hole in the vacuum suction groove is positioned in the middle of the inner side wall of the vacuum suction groove.

The port of the communication hole is arranged on the side wall of the vacuum suction groove, so that the upper end part of the communication hole is in a horizontal state, and the phenomenon that the pipeline is blocked due to the fact that impurities falling into the vacuum suction groove or processing scrap iron directly fall into the communication hole is avoided, and the vacuum suction work is influenced.

Further, the upper surface of the placing plate is positioned at two sides of the vacuum suction groove port along the width direction of the base, and the two sides are respectively and vertically fixed with a positioning pin which is matched with a positioning hole on the workpiece.

Through inserting the locating pin alignment in the locating hole on the work piece, can carry out quick location with the work piece, avoid traditional work piece correction and seek the trouble of limit, guaranteed machining precision.

The placing plate is fixed above the base through the fastening screw, and meanwhile, the fastening screw is screwed off, so that the placing plate can be conveniently detached from the upper part of the base, and parts in the built-in cavity are not overhauled.

Drawings

FIG. 1 is a perspective view of the overall structure of the present utility model;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1A;

FIG. 3 is a schematic view of a partial cross-sectional structure of a base in the present utility model;

fig. 4 is a schematic view of a partial cross-sectional structure of a placement plate according to the present utility model.

In the figure: 1. a base; 11. a built-in cavity; 2. placing a plate; 21. a positioning pin; 22. fastening a screw; 3. a vacuum suction groove; 31. a rubber ring; 32. an airway; 33. a communication hole; 34. a one-way valve A; 35. a one-way valve B; 4. a vacuum generator; 41. and connecting the guide pipes.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The 01 direction in the figure is the length direction of the equipment and the parts thereof, the 02 direction in the figure is the width direction of the equipment and the parts thereof, and the 03 direction in the figure is the height direction of the equipment and the parts thereof.

Referring to fig. 1-4, the vacuum suction positioning fixture provided by the utility model is provided with a base 1 and a placing plate 2, wherein the placing plate 2 is arranged on the upper side of the base 1, and vacuum suction grooves 3 are arranged on the upper surface of the placing plate 2 at equal intervals along the length direction of the base 1; the upper surface of the placing plate 2 is fixedly provided with a rubber ring 31 around the port of the vacuum suction groove 3, the inner walls of the two sides of the vacuum suction groove 3 along the length direction of the base 1 are respectively provided with a communication hole 33, a one-way valve A34 is arranged in the communication hole 33 on one side, and a one-way valve B35 is arranged in the communication hole 33 on the other side; the flow guiding directions of the check valve A34 and the check valve B35 are opposite; an air passage 32 is vertically arranged in the placement plate 2 below the vacuum suction groove 3, and the communication holes 33 are all communicated in the air passage 32; the base 1 is internally provided with a vacuum device, and a negative pressure vacuum effect is generated in the vacuum suction groove 3 through the vacuum device.

In the process of fixing a workpiece to be milled by using the device, the workpiece is horizontally placed above the placing plate 2, the bottom surface of the workpiece is attached to the positioning pin 21, the vacuum device is used for sucking the workpiece in the vacuum suction groove 3 and the bottom surface of the workpiece to a negative pressure vacuum state under the flow guiding effect of the air passage 32 and the communication hole 33, so that the workpiece is firmly held above the placing plate 2, the workpiece is fixed, the traditional clamping or bolt locking mode is replaced, the condition that the surface of the workpiece is damaged by excessive clamping extrusion force is avoided, the rubber ring 31 is tightly attached to the lower surface of the workpiece, the sealing effect is improved, after the workpiece is processed, the vacuum negative pressure in the vacuum suction groove 3 is cancelled by the vacuum device, the workpiece can be taken down, the workpiece clamping and the canceling process are convenient and quick, and the processing efficiency is improved.

Specifically, an inner cavity 11 with an open upper end is arranged in the base 1; the vacuum device comprises a vacuum generator 4 respectively fixed in the built-in cavity 11 and a connecting conduit 41 respectively connected with the vacuum generator 4; the tip of connecting conduit 41 extends into airway 32 and communicates with airway 32. Through the cooperation of the vacuum generator 4 and the compressor, and the diversion effect of the connecting conduit 41, the air passage 32 and the communication hole 33, the vacuum effect can be conveniently realized in the vacuum suction groove 3, thereby being convenient for sucking the workpiece on the placing plate 2 in vacuum.

Specifically, the flow guiding direction of the check valve a34 is led into the vacuum suction groove 3 from the air channel 32, and the flow guiding direction of the check valve B35 is led into the air channel 32 from the vacuum suction groove 3. Because the flow guiding directions of the check valve A34 and the check valve B35 are opposite, in the vacuum sucking process, air in the vacuum sucking groove 3 can be sucked into the air passage 32 through the communication hole 33, so that the vacuum sucking groove 3 is convenient for a star vacuum negative pressure effect, and when the material is taken, air in the air passage 32 can be guided into the vacuum sucking groove 3 through the communication hole 33, so that the air pressure in the vacuum sucking groove 3 is balanced with the external air pressure, the holding force on a workpiece is eliminated, and the workpiece is convenient to take down.

Specifically, the communication hole 33 is in a transverse J shape, and a port of the communication hole 33 in the vacuum suction groove 3 is positioned in the middle of the inner side wall of the vacuum suction groove 3. The port of the communication hole 33 is arranged on the side wall of the vacuum suction groove 3, so that the upper end part of the communication hole 33 is in a horizontal state, and the phenomenon that the pipeline is blocked due to the fact that impurities falling into the vacuum suction groove 3 or processing scrap iron directly fall into the communication hole 33 to influence the vacuum suction work is avoided.

Specifically, the upper surface of the placing plate 2 is positioned at two sides of the port of the vacuum suction groove 3 along the width direction of the base 1 and is vertically fixed by positioning pins 21, and the positioning pins 21 are matched with positioning holes on a workpiece. When the workpiece is placed on the placing plate 2, the workpiece can be rapidly positioned by inserting the positioning pins 21 into the positioning holes on the workpiece in an aligned manner, so that the trouble of correcting and edge searching of the traditional workpiece is avoided, and the machining precision is ensured.

Specifically, the placement plate 2 is fixed above the base 1 by fastening screws 22 provided at four corners thereof. The placing plate 2 is fixed above the base 1 through the fastening screw 22, and meanwhile, the placing plate 2 can be conveniently detached from the upper side of the base 1 by unscrewing the fastening screw 22, so that the parts in the built-in cavity 11 are not overhauled.

The foregoing detailed description of the utility model has been presented in conjunction with a specific embodiment, and it is not intended that the utility model be limited to such detailed description. Several equivalent substitutions or obvious modifications will occur to those skilled in the art to which this utility model pertains without departing from the spirit of the utility model, and the same should be considered to be within the scope of this utility model as defined in the appended claims.

Claims

1. The utility model provides a vacuum suction positioning fixture, has base (1) and place board (2), its characterized in that:

the placing plate (2) is arranged on the upper side of the base (1), and vacuum suction grooves (3) are formed in the upper surface of the placing plate (2) in an equidistant manner along the length direction of the base (1);

a rubber ring (31) is fixed on the upper surface of the placement plate (2) around the port of the vacuum suction groove (3), communication holes (33) are respectively formed in the inner walls of the two sides of the vacuum suction groove (3) along the length direction of the base (1), a one-way valve A (34) is arranged in one communication hole (33), and a one-way valve B (35) is arranged in the other communication hole (33);

the flow guiding directions of the one-way valve A (34) and the one-way valve B (35) are opposite;

an air passage (32) is vertically arranged in the placement plate (2) and below the vacuum suction groove (3), and the communication holes (33) are all communicated in the air passage (32);

the base (1) is internally provided with a vacuum device, and the vacuum device is used for generating a negative pressure vacuum effect in the vacuum suction groove (3).

2. A vacuum chuck positioning fixture as set forth in claim 1, wherein:

a built-in cavity (11) with an open upper end is arranged in the base (1);

the vacuum device comprises a vacuum generator (4) which is respectively fixed in the built-in cavity (11) and a connecting conduit (41) which is respectively connected with the vacuum generator (4);

the top end of the connecting conduit (41) correspondingly penetrates into the air passage (32) and is communicated with the air passage (32).

3. A vacuum chuck positioning fixture as set forth in claim 1, wherein:

the flow guiding direction of the one-way valve A (34) is guided into the vacuum suction groove (3) by the air passage (32), and the flow guiding direction of the one-way valve B (35) is guided into the air passage (32) by the vacuum suction groove (3).

4. A vacuum chuck positioning fixture as set forth in claim 1, wherein:

the communication hole (33) is in a transverse J shape, and a port of the communication hole (33) positioned in the vacuum suction groove (3) is positioned in the middle of the inner side wall of the vacuum suction groove (3).

5. A vacuum chuck positioning fixture as set forth in claim 1, wherein:

the upper surface of the placing plate (2) is positioned at two sides of the port of the vacuum suction groove (3) along the width direction of the base (1) and is respectively and vertically fixed with a positioning pin (21), and the positioning pin (21) is matched with a positioning hole on a workpiece.

6. A vacuum chuck positioning fixture as set forth in claim 1, wherein:

the placing plate (2) is fixed above the base (1) through fastening screws (22) arranged at the four top corners of the placing plate.