CN210452475U

CN210452475U - Part machining clamp

Info

Publication number: CN210452475U
Application number: CN201921422026.XU
Authority: CN
Inventors: 章海龙; 缪鸣伟; 彭羿飞; 陈金童
Original assignee: Shanghai Aircraft Manufacturing Co Ltd
Current assignee: Shanghai Aircraft Manufacturing Co Ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-05-05
Anticipated expiration: 2029-08-29

Abstract

The utility model discloses a parts machining anchor clamps relates to numerical control processing technology field. The part machining clamp comprises a base and an adsorption mechanism, wherein the adsorption mechanism is arranged on the base, a plurality of crossed air passages are arranged on the upper surface of the adsorption mechanism, and an air suction hole communicated with the air passages is formed in the adsorption mechanism; the upper surface of the adsorption mechanism is also provided with a plurality of positioning holes, the positioning holes are detachably connected with positioning mechanisms, and the positioning mechanisms are configured to position and compress parts. The utility model discloses an adsorption apparatus constructs the upper surface and sets up the locating hole, and positioning mechanism can dismantle through with the locating hole and be connected, realizes the location of sheet metal part and compresses tightly. An operator can set the mounting position of the positioning mechanism according to the size of the part, and the subsequent part can be quickly clamped and machined.

Description

Part machining clamp

Technical Field

The utility model relates to a numerical control processing technology field especially relates to a parts machining anchor clamps.

Background

Precision thin plate parts are common parts for numerical control machining, the general thickness of the parts is only 1-10 mm, and the parts are easy to deform during machining to cause thickness out-of-tolerance, so a vacuum adsorption clamp is often selected for clamping and machining the thin plate parts. The operating principle of traditional vacuum adsorption anchor clamps is through managing the air of managing to find time the intracavity, forms the vacuum and makes the work piece adsorb in the adsorption plate surface, but part can only pass through vacuum adsorption in the anchor clamps of this structure, unable location and compress tightly, and the part easily takes place the displacement during processing, leads to scrapping therefore the practicality not strong.

Accordingly, there is a need for a part machining fixture to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a parts machining anchor clamps possesses the location and compresses tightly the function, and is applicable to the quick clamping processing of part.

To achieve the purpose, the utility model adopts the following technical proposal:

a part machining clamp comprises a base and an adsorption mechanism, wherein the adsorption mechanism is arranged on the base, a plurality of crossed air passages are arranged on the upper surface of the adsorption mechanism, and air suction holes communicated with the air passages are formed in the adsorption mechanism; the upper surface of the adsorption mechanism is also provided with a plurality of positioning holes, the positioning holes are detachably connected with positioning mechanisms, and the positioning mechanisms are configured to position and compress parts.

Optionally, the positioning mechanism includes a positioning column, an external thread is arranged at the lower end of the positioning column, and the positioning column is in threaded connection with the positioning hole.

Optionally, a threaded hole is formed in the top end of the positioning column, the positioning mechanism further comprises a first fastener, and the first fastener penetrates through the part and is in threaded connection with the positioning column.

Optionally, when the positioning column is connected with the positioning hole, the upper end of the positioning column is not higher than the upper surface of the adsorption mechanism.

Optionally, a sealing member is detachably arranged in the air passage, and the size of the sealing member along the depth direction of the air passage is larger than the depth of the air passage.

Optionally, the positioning hole is disposed on the air passage and is disposed in a staggered manner with respect to the intersection of the plurality of air passages, and the sealing member is configured to block the positioning hole.

Optionally, the plurality of air passages divide the surface of the adsorption mechanism into a plurality of polygonal small bosses with flat top surfaces, and the positioning holes are formed in the polygonal small bosses.

Optionally, the positioning mechanism further includes a pressing plate detachable from the positioning column, and the pressing plate is used for abutting against the top surface of the part.

Optionally, the positioning mechanism further includes a second fastening member, a sliding groove extending in the horizontal direction is formed in the pressing plate, and the second fastening member is arranged in the sliding groove in a penetrating manner and is in threaded connection with the top of the positioning column.

Optionally, a vacuum port is arranged on the base, and the vacuum port is communicated with the air suction hole.

The utility model has the advantages that:

the utility model provides a pair of parts machining anchor clamps, the adsorption apparatus of this anchor clamps constructs the upper surface and is provided with the locating hole, and positioning mechanism can dismantle through with the locating hole and be connected, realizes the location of sheet metal part and compresses tightly, and the operator can set up positioning mechanism's mounted position according to the part size, follow-up quick clamping processing part.

In addition, positioning mechanism can be selective be provided with the clamp plate, supports the mode of pressing the part top surface through the clamp plate and further fixes the part, prevents to add the part and takes place the displacement man-hour to better processing effect has.

Drawings

Fig. 1 is a schematic structural diagram of a part machining fixture according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a positioning column according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;

fig. 4 is a schematic structural view of a part machining jig provided in embodiment 1 of the present invention;

fig. 5 is a schematic structural view of a part machining jig provided in embodiment 2 of the present invention;

fig. 6 is a schematic structural view of a part machining jig according to embodiment 3 of the present invention.

In the figure:

1-a base; 2-an adsorption mechanism;

11-a vacuum interface; 21-the airway; 22-a positioning mechanism; 23-a platen;

211-air extraction holes; 212-positioning holes; 213-polygonal small boss; 221-positioning columns; 222-a first fastener; 223-a second fastener; 231-chute.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

The first embodiment is as follows:

the embodiment provides a parts machining anchor clamps, possesses the location and compresses tightly the function, and is applicable to the quick location clamping of part. As shown in fig. 1, the part processing fixture includes a base 1 and an adsorption mechanism 2, the adsorption mechanism 2 is disposed on the base 1, and the adsorption mechanism 2 may be an adsorption plate. The upper surface of the adsorption mechanism 2 is provided with a plurality of crossed air passages 21 and air exhaust holes 211 communicated with the air passages 21, the base 1 is provided with a vacuum interface 11 communicated with the air exhaust holes 211, and external vacuum-pumping equipment can adsorb parts on the surface of the adsorption mechanism 2 in vacuum through the vacuum interface 11.

In the prior art, when thin-plate parts are machined and clamped, the parts can be fixed only through vacuum adsorption, on one hand, the parts cannot be positioned, and the parts cannot be clamped quickly according to a coordinate system set in a machine tool, so that the efficiency is low; on the other hand, the vacuum adsorption is only applied to fix the parts, the parts cannot be compressed, and the parts are easy to displace during processing, so that the parts are scrapped.

In order to solve the above problem, in the present embodiment, a plurality of positioning holes 212 are further disposed on the upper surface of the adsorption mechanism 2, the positioning holes 212 are detachably connected with the positioning mechanism 22, and the positioning and pressing of the parts are realized through the positioning mechanism 22.

Specifically, the positioning hole 212 may be a threaded hole, and the threaded structure has the characteristics of good sealing performance and convenient assembly and disassembly, so that the positioning mechanism 22 can be detachably connected with the positioning hole 212 through the threaded structure. In addition, the positioning holes 212 can also be provided as pin holes, and the precise positioning of the parts can be performed through transition fit of the positioning pins and the pin holes.

Preferably, as shown in fig. 1-3, in order to realize the matching of the positioning mechanism 22 and the positioning hole 212, the positioning mechanism 22 includes a positioning column 221, a lower end of the positioning column 221 is provided with an external thread, and the positioning column 221 is connected with the positioning hole 212 through a thread. Correspondingly, the lower end of the positioning hole 212 is provided with an internal thread, and the upper end of the positioning hole 212 is provided with a pin hole, so that a structure combining the thread and the pin hole is formed, and the positioning mechanism 22 can be detachably connected with the positioning hole 212. Through the mode of combination on the one hand can utilize the screw to dismantle convenient characteristics, the operator of being convenient for unscrews reference column 221, and on the other hand can realize more accurate location through the locating pin. In addition, can set up to hexagon socket head cap structure at reference column 221 top, can twist out reference column 221 through more convenient instruments such as spanners.

In this embodiment, as shown in fig. 1 and 4, when the positioning post 221 is connected to the positioning hole 212, the upper end of the positioning post 221 is not higher than the upper surface of the adsorption mechanism 2, so as to place the component on the surface of the adsorption mechanism 2. In order to press the part on the upper surface of the adsorption mechanism 2, a threaded hole is provided at the top end of the positioning column 221, and the positioning mechanism 22 further comprises a first fastening piece 222, and the first fastening piece 222 is in threaded connection with the positioning column 221. Because the edge of the part often leaves a margin, an operator can select the corresponding positioning hole 212 according to the position of the part placed on the adsorption mechanism 2, and the first fastening piece 222 is penetrated in the position of the part leftover material, and the first fastening piece 222 is connected with the positioning column 221 through threads, so that the part is compressed. In addition, the four first fastening pieces 222 are arranged and evenly distributed at the four corners of the part, and the arrangement mode enables the pressing force to be more balanced and the fixing effect to be better. In this embodiment, the first fastening member 222 may be a screw.

In this embodiment, the plurality of intersecting air passages 21 divide the surface of the adsorption mechanism 2 into a plurality of polygonal small bosses 213 with flat top surfaces, a sealing member is detachably disposed in the air passage 21 at the outer ring of the polygonal small bosses 213, and the size of the sealing member in the depth direction of the air passage 21 is larger than the depth of the air passage 21. The positioning hole 212 may be arranged on the air passage 21 by staggering the intersection positions of the air passages 21, or arranged on the polygonal small boss 213, when the positioning hole 212 is arranged on the air passage 21, the sealing member needs to be configured to block the positioning hole 212, so as to ensure that the inside of the sealing member is in a vacuum state, and vacuum-adsorb the part on the upper surface of the adsorption mechanism 2.

Preferably, the sealing element can be arranged in a cylindrical shape, the bottom wall of the air passage 21 is correspondingly arranged in an arc shape, and compared with other contact modes with water caltrops, the arc contact mode has higher shape matching degree, and gaps are not easy to form, so that the sealing element has better sealing property. In addition, foaming type silica gel strip can be chooseed for use to the sealing member, and foaming type silica gel strip has advantages such as texture is soft, the resilience is good and repeatedly usable, changes in carrying out sealed of air flue 21.

When the operator processes the thin plate part, the following steps can be taken:

in the first step, the placing position on the adsorption mechanism 2 is selected according to the shape and size of the part to be processed, the positioning hole 212 of the edge part of the part is judged, and meanwhile, the part is ensured to cover the air suction hole 211.

Secondly, determining the margin of the edge of the part to be processed, ensuring that the position of the edge positioning hole 212 is within the range of the margin of the edge, setting a coordinate system at a corresponding position in the machine tool, and penetrating a first fastener 222 connected with the positioning column 221 at the corresponding position of the part.

And thirdly, selecting a corresponding air channel 21 to place a sealing element according to the position of the part, and ensuring that the part can completely cover the annular area formed by the sealing element. After the external vacuum equipment is connected with the vacuum interface 11, the part is horizontally placed on the sealing element, the first fastening piece 222 connected with the positioning column 221 is screwed down, the top end of the sealing element is abutted to the part, the bottom end of the sealing element is abutted to the air channel 21, a sealing space can be formed between the part and the adsorption mechanism 2 through deformation of the sealing element, and the upper end opening of the annular region is closed by the part.

And fourthly, starting a vacuum switch, pumping air in the enclosed space between the part and the sealing element and between the part and the adsorption mechanism 2 out through the pumping hole 211 by using the pumping equipment, and fixing the part on the adsorption mechanism 2 under the action of the first fastening piece 222 and the atmospheric pressure, so that the part can be machined.

And fifthly, after the machining is finished, the vacuum switch is closed, air enters between the part and the adsorption mechanism 2, the sealing element deformed by pressure rebounds, the first fastening piece 222 is detached from the positioning column 221, and the machined part can be easily taken down.

Example two:

the embodiment provides a part machining clamp, which is different from the first embodiment in that, as shown in fig. 1 and 5, the positioning mechanism 22 further includes a pressing plate 23 selectively connected to the positioning column 221, and the pressing plate 23 presses against the top surface of the part, so that the part is stressed more uniformly, and the part is prevented from being deformed due to excessive pressing force. Simultaneously can set up a plurality of clamp plates 23 and support and press the part surface, restriction part takes place the displacement in other directions, and in addition, a plurality of clamp plates 23 symmetry set up in the part both sides in this embodiment, and this arrangement mode makes the part compress tightly more evenly.

In this embodiment, the first fastening member 222 may be selectively disposed on the surface of the part, that is, when the machining allowance of the part is small and is not suitable for being pressed by the positioning pillar 221, the part may be pressed only by the pressing plate 23.

Specifically, the positioning mechanism 22 further includes a second fastening member 223, and the second fastening member 223 is inserted into the pressing plate 23 and is connected to the positioning column 221 through a screw thread, so as to press and fix the component.

Preferably, the pressing plate 23 is provided with a sliding groove 231 extending along the horizontal direction, the second fastening member 223 penetrates through the sliding groove 231 and is in threaded connection with the top of the positioning column 221, and the pressing plate 23 changes the pressing position along the sliding groove 231, so that the parts can be fixed more conveniently. In this embodiment, the second fastener 223 may be a screw.

When the operator processes the part by pressing the pressing plate 23, the first fastening member 222 can be selectively arranged, the arrangement method is the same as that of the first embodiment, and the second fastening member 223 can be installed by the following steps:

Secondly, selecting a corresponding positioning column 221 according to the position where the part is placed, and penetrating a second fastener 223 on the pressing plate 23.

And thirdly, selecting a corresponding air channel 21 to place a sealing element according to the position of the part, and ensuring that the part can completely cover the annular area formed by the sealing element. After the external vacuum equipment is connected with the vacuum interface 11, the part is horizontally placed on the sealing element.

Fourthly, adjusting the position of the pressing plate 23 along the direction of the sliding groove 231 according to the position of the part, after the position of the pressing plate 23 is selected, screwing a second fastening piece 223 connected with the positioning column 221 on the pressing plate 23, pressing the pressing plate 23 to the part, enabling the top end of the sealing element to be abutted against the part, enabling the bottom end of the sealing element to be abutted against the air channel 21, forming a sealing space between the part and the adsorption mechanism 2 through deformation of the sealing element, and sealing the upper end opening of the annular region by the part.

And fifthly, starting a vacuum switch, pumping air in the enclosed space between the part and the sealing element and the adsorption mechanism 2 out through the air pumping hole 211 by the vacuum pumping equipment, and fixing the part on the adsorption mechanism 2 under the action of the pressure plate 23 and atmospheric pressure, so that the part can be machined.

And sixthly, after the processing is finished, the vacuum switch is closed, air enters between the part and the adsorption mechanism 2, the sealing element deformed by pressure rebounds, the second fastening piece 223 is detached from the positioning column 221, the pressing plate 23 is removed, and the processed part can be easily taken down.

Example three:

in this embodiment, as shown in fig. 1 and 6, when the pressing plate 23 in the second embodiment is used to press a part, the positioning column 221 may be partially screwed out, and the upper end of the positioning column 221 may protrude from the surface of the adsorption mechanism 2. The placing position of the part can be selected on the surface of the adsorption mechanism 2 according to the shape and size of the part, the positioning column 221 in the corresponding positioning hole 212 is screwed out locally, the upper end of the positioning column 221 is higher than the upper surface of the adsorption mechanism 2, the positioning column 221 is abutted with the edge of the part, the fixed-point placing of the part is realized, a coordinate system of a corresponding position can be set in a machine tool in advance through the fixed-point position, and when the subsequent part is machined, the part can be quickly clamped without repeatedly calibrating the original point.

When an operator carries out rapid part clamping and machining, the following steps can be taken:

in a first step, the placement position on the suction mechanism 2 is selected according to the shape and size of the part to be machined while ensuring that the part covers the suction hole 211. The positioning hole 212 of the outer edge portion of the part is determined, and the positioning post 221 in the positioning hole 212 is partially screwed out, so that the upper end of the positioning post 221 is higher than the upper surface of the adsorption mechanism 2.

And thirdly, selecting a corresponding air channel 21 to place a sealing element according to the position of the part, and ensuring that the part can completely cover the annular area formed by the sealing element. After the external vacuum equipment is connected with the vacuum interface 11, the part is horizontally placed on the sealing element. The position of the pressing plate 23 is adjusted along the direction of the sliding groove 231 according to the position of the part, after the position of the pressing plate 23 is selected, the second fastening piece 223 connected with the positioning column 221 on the pressing plate 23 is screwed, the pressing plate 23 is pressed on the part, the top end of the sealing piece is abutted against the part, the bottom end of the sealing piece is abutted against the air channel 21, a sealing space can be formed between the part and the adsorption mechanism 2 through deformation of the sealing piece, and the upper end opening of the annular area is closed by the part.

And fourthly, starting a vacuum switch, pumping air in the enclosed space between the part and the sealing element and between the part and the adsorption mechanism 2 out through the air pumping hole 211 by the vacuum pumping equipment, and fixing the part on the adsorption mechanism 2 under the action of the pressure plate 23 and the atmospheric pressure, so that the part can be machined.

And fifthly, after the machining is finished, the vacuum switch is closed, air enters between the part and the adsorption mechanism 2, the pressed and deformed sealing element rebounds, the second fastening piece 223 is detached from the positioning column 221, the pressing plate 23 is removed, and the machined part can be easily taken down.

And subsequently, parts with the same shape and size are clamped or the same part is turned over, the part can be directly placed at the position of the fixed point of the convex positioning column 221 without repeated calibration, and the quick clamping and processing of the part can be realized by repeating the fourth step and the fifth step.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A part machining clamp comprises a base (1) and an adsorption mechanism (2), wherein the adsorption mechanism (2) is arranged on the base (1), and the upper surface of the adsorption mechanism (2) is provided with a plurality of crossed air passages (21), and is characterized in that the adsorption mechanism (2) is provided with an air suction hole (211) communicated with the air passages (21);

the upper surface of the adsorption mechanism (2) is further provided with a plurality of positioning holes (212), the positioning holes (212) are internally detachably connected with positioning mechanisms (22), and the positioning mechanisms (22) are configured to position and press parts.

2. The part machining clamp according to claim 1, wherein the positioning mechanism (22) comprises a positioning column (221), the lower end of the positioning column (221) is provided with an external thread, and the positioning column (221) is in threaded connection with the positioning hole (212).

3. The part machining clamp according to claim 2, wherein a threaded hole is formed in the top end of the positioning column (221), the positioning mechanism (22) further comprises a first fastening member (222), and the first fastening member (222) penetrates through the part and is in threaded connection with the positioning column (221).

4. The part processing clamp according to claim 2, wherein when the positioning column (221) is connected to the positioning hole (212), an upper end of the positioning column (221) is not higher than an upper surface of the adsorption mechanism (2).

5. A parts machining jig according to any one of claims 1 to 4, characterized in that a seal member is detachably provided in the air path (21), and a dimension of the seal member in a depth direction of the air path (21) is larger than a depth of the air path (21).

6. The parts machining jig according to claim 5, wherein the positioning hole (212) is provided in the air passage (21) so as to be offset from an intersection of a plurality of the air passages (21), and the sealing member is configured to block the positioning hole (212).

7. The parts machining jig according to any one of claims 1 to 4, wherein a plurality of air passages (21) define a plurality of polygonal small bosses (213) having flat top surfaces on the surface of the suction mechanism (2), and the positioning holes (212) are provided on the polygonal small bosses (213).

8. A parts machining fixture according to claim 3, wherein the positioning mechanism (22) further comprises a pressing plate (23) detachably connected to the positioning post (221), the pressing plate (23) being configured to press against the top surface of the part.

9. The part machining clamp according to claim 8, wherein the positioning mechanism (22) further comprises a second fastening member (223), a sliding slot (231) extending along the horizontal direction is formed in the pressing plate (23), and the second fastening member (223) is inserted into the sliding slot (231) and is in threaded connection with the top of the positioning column (221).

10. The part machining clamp according to any one of claims 1 to 4, characterized in that a vacuum port (11) is arranged on the base (1), and the vacuum port (11) is communicated with the suction hole (211).