CN210499278U

CN210499278U - Multi-station clamp

Info

Publication number: CN210499278U
Application number: CN201920846858.8U
Authority: CN
Inventors: 张森; 陈垚; 熊向军; 陈进华
Original assignee: Shenzhen Silver Basis Technology Co Ltd
Current assignee: Shenzhen Silver Basis Technology Co Ltd
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2020-05-12
Anticipated expiration: 2029-06-04

Abstract

The utility model provides a multi-station clamp, which comprises a bottom plate and a workpiece clamping mechanism; the bottom plate is provided with a plurality of positioning parts; the workpiece clamping mechanism comprises an exchange plate and at least one workpiece clamping assembly arranged on the exchange plate. And clamping the workpiece through the workpiece clamping mechanism, and positioning the workpiece clamping mechanism and the workpiece on the bottom plate together. The bottom plate is provided with a plurality of positioning parts, and the positioning parts are positioned on the machine tool through at least one positioning part, so that different positioning and mounting positions can be provided for the interchangeable plate. The workpiece clamping mechanism can be disassembled and assembled together with the workpiece relative to the bottom plate due to the fact that the bottom plate and the interchange plate are detachable, external clamping can be achieved, and meanwhile the workpiece clamping mechanism corresponding to different products can be replaced. The bottom plate can be provided with a plurality of workpiece clamping mechanisms, so that the machine tool can be provided with a plurality of stations during machining, the times of clamping products in machining are reduced, the clamping difficulty is reduced, the program is linked, the batch processing is realized, and the program machining time of single products is reduced.

Description

Multi-station clamp

Technical Field

The utility model relates to an anchor clamps technical field especially relates to a multistation anchor clamps.

Background

In machining production, a workpiece needs to be clamped and positioned by the fixture, so that the workpiece can be always fixed when being subjected to cutting force, and therefore the workpiece and the cutter can effectively move relatively, and the cutter can effectively machine the workpiece.

In the prior art, a plurality of varieties and small-batch products are processed by a one-out mode generally, and the processing mode has the following defects:

1. the clamp is not matched with the machine tool, so that resources are wasted;

2. the procedure can not be processed by combined cutting, and needs to be repositioned and adjusted, even the cutter needs to be replaced, thus wasting the processing time;

3. workpieces are clamped in the machine, so that the operation is inconvenient, and the standby time is prolonged;

4. the wire changing and the clamp changing are slow, and the standby time is prolonged.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a multistation anchor clamps to solve anchor clamps wasting of resources that exists among the prior art big, the course of working location/tool changing number of times many, clamping/trade and press from both sides at least one problem in the length consuming time.

Therefore, the purpose of the utility model is realized by the following technical scheme:

a multi-station clamp comprises a bottom plate and a workpiece clamping mechanism;

the base plate is provided with a plurality of positioning parts and can be positioned at different positions of the machine tool through different positioning parts;

the workpiece clamping mechanism comprises an exchange plate and at least one workpiece clamping assembly arranged on the exchange plate, the exchange plate can be positioned at different positions of the bottom plate through different positioning parts, the exchange plate is detachable relative to the bottom plate, and the workpiece clamping assembly is used for clamping workpieces on the exchange plate.

As a further optional scheme of the multi-station fixture, the multi-station fixture further comprises a clamping assembly, the clamping assembly comprises a plurality of clamping pieces, the clamping assembly corresponds to the workpiece clamping mechanism one by one, and the clamping pieces have a clamping stroke for clamping the interchangeable plate on the bottom plate and a releasing stroke for releasing the interchangeable plate.

As a further optional scheme of the multi-station fixture, the multi-station fixture further comprises a supporting plate, the clamping assembly is detachably connected to the bottom plate through the supporting plate, the supporting plate is positioned at different positions of the bottom plate through different positioning portions, and the exchange plate is positioned on the supporting plate;

the supporting plate can be provided with at least one group of clamping assembly.

As a further optional scheme of the multi-station fixture, the clamping assembly further comprises a supporting piece, the supporting piece is connected to the supporting plate and used for supporting the exchange plate, and a positioning structure is formed between the supporting piece and the exchange plate.

As a further optional solution of the multi-station fixture, the clamping member includes a clamping cylinder.

As a further optional scheme of the multi-station clamp, the positioning part is a positioning hole;

the bottom plate is also provided with a plurality of mounting holes, the mounting holes are uniformly distributed on the bottom plate at intervals, the positioning holes are uniformly distributed on the bottom plate at intervals, and the positioning holes and the mounting holes are distributed at intervals;

the precision of the positioning hole is higher than that of the mounting hole.

As a further optional scheme of the multi-station fixture, a positioning piece and a positioning boss are arranged on the interchanging plate, the positioning piece is used for positioning one edge of the workpiece, and the positioning boss is used for positioning one adjacent edge of the edge;

the positioning piece and the workpiece clamping component are arranged oppositely, and the workpiece clamping component is provided with a clamping stroke moving towards the positioning piece and a releasing stroke moving away from the positioning piece.

As a further optional scheme of the multi-station fixture, a cushion block is further arranged on the exchange plate, the cushion block is arranged between the exchange plate and the workpiece, and the positioning boss is arranged on the cushion block.

As a further optional scheme of the multi-station fixture, the workpiece clamping assembly includes a movable clamping block and a bolt, the bolt includes a screw rod and a bolt head which are connected with each other, the screw rod passes through the movable clamping block and is connected to the exchange plate, an inclined surface is formed between the bolt head and the movable clamping block and is matched with the movable clamping block, and the inclined surface inclines downwards or upwards from one side close to the workpiece to one side far away from the workpiece.

As a further optional solution of the multi-station fixture, a handle is provided on the interchanging plate.

The utility model discloses a multistation anchor clamps have following beneficial effect at least:

the workpiece is clamped through the workpiece clamping mechanism, the workpiece clamping mechanism and the workpiece are positioned on the bottom plate as a whole, and the workpiece is positioned through the bottom plate positioning exchange plate equivalently. The bottom plate is provided with a plurality of positioning parts which are positioned on the machine tool through at least one positioning part, and meanwhile, the plurality of positioning parts can provide different positioning and mounting positions for the workpiece clamping mechanism, namely, the exchange plate, so that the workpiece has a better positioning effect relative to the machine tool. The workpiece clamping mechanism can be disassembled and assembled together with the workpiece relative bottom plate due to the fact that the bottom plate and the exchange plate are detachable, external clamping can be achieved, the clamping difficulty is reduced, meanwhile, the workpiece clamping mechanism corresponding to different products can be replaced, line changing positioning is free of correction, and production efficiency is improved. The bottom plate can be provided with a plurality of workpiece clamping mechanisms, so that a machine tool can be provided with a plurality of machining stations during machining, one product is changed into a plurality of products, the number of times of clamping the products during machining is reduced, program linkage and batch processing are realized, and the program machining time of single products is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic top view of a multi-station fixture according to an embodiment of the present invention;

fig. 2 is a schematic view illustrating an axial measurement structure of a multi-station fixture according to an embodiment of the present invention;

fig. 3 is a schematic top view of a partial structure of a multi-station fixture according to an embodiment of the present invention;

fig. 4 is a schematic view of a partial axial measurement structure of a multi-station fixture according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram illustrating a bottom plate of a multi-station fixture according to an embodiment of the present invention;

FIG. 6 shows the schematic of the structure of FIG. 4 with the workpiece removed;

FIG. 7 shows the schematic construction of FIG. 6 with the workpiece clamping mechanism removed;

fig. 8 shows a schematic cross-sectional structure at a in fig. 4.

Description of the main element symbols:

1000-multi-station fixture; 1100-backplane; 1110-a positioning section; 1120-mounting holes; 1130-baseplate locating pins; 1140-baseplate bolts; 1200-a workpiece holding mechanism; 1210-exchange plate; 1211-locating element; 1212-positioning a boss; 1213-cushion block; 1214-a handle; 1220-a workpiece clamping assembly; 1221-a movable clamping block; 1222-a bolt; 1223-a washer; 1300-clamping assembly; 1310-clamping the piece; 1320-a support; 1400-pallet.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, 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 therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only 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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, and may be internal to both elements or in any intervening relationship between the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1 and fig. 2, the present embodiment provides a multi-station fixture 1000, which is used in machining, such as a numerical control machine tool, for clamping and positioning a workpiece. The multi-station jig 1000 includes a base plate 1100 and a workpiece holding mechanism 1200. The bottom plate 1100 is used for being installed and fixed on a machine tool, the workpiece clamping mechanism 1200 is used for clamping a workpiece, and the workpiece clamping mechanism 1200 enables the workpiece to be positioned on the machine tool by being installed on the bottom plate 1100.

Referring to fig. 3 and 4, the base plate 1100 has a plurality of positioning portions 1110, the base plate 1100 is positioned on the machine tool by at least one positioning portion 1110, and the base plate 1100 can be positioned on different positions of the machine tool by different positioning portions 1110, so that the positioning position of the base plate 1100 on the machine tool can be adjusted. The base plate 1100 positions the workpiece clamping mechanism 1200 through the positioning portion 1110, so that the workpiece clamping mechanism 1200 can be positioned more accurately on the machine tool. A plurality of workpiece holding mechanisms 1200 can be mounted on the base plate 1100 to enable a plurality of processing stations on the machine tool. The workpiece clamping mechanism 1200 comprises an exchange plate 1210 and at least one workpiece clamping assembly 1220 arranged on the exchange plate 1210, wherein the exchange plate 1210 can be positioned at different positions of the bottom plate 1100 through different positioning parts 1110, so that the positioning of workpieces on the machine tool is more flexible, and meanwhile, the bottom plate 1100 can be adapted to the exchange plates 1210 with various dimensions due to the plurality of positioning parts 1110 on the bottom plate 1100, so that the workpiece clamping mechanism has better adaptability.

The interchanging plate 1210 is detachable with respect to the base plate 1100. Therefore, on one hand, the type of the workpiece clamping mechanism 1200 can be changed to adapt to clamping of workpieces with different sizes, specifications and structures; on the other hand, the workpiece clamping component 1220 and the workpiece can be assembled and disassembled together relative to the base plate 1100, so that the workpiece can be clamped outside the machine, the operation is convenient, and the downtime caused by clamping the workpiece is shortened.

Further, multiple sets of workpiece clamping mechanisms 1200 may be configured. When the workpiece is machined, the workpiece is clamped by the other set of workpiece clamping mechanism 1200 outside the machine, and after the machining of the workpiece inside the machine is completed, the other set of workpiece clamping mechanism 1200 is mounted on the base plate 1100 together with the workpiece, so that the downtime of the machine tool caused by clamping the workpiece can be further shortened. The clamping difficulty is reduced, the workpiece clamping mechanisms corresponding to different products can be replaced, the line changing and positioning are free of correction, and the production efficiency is improved. The machine tool is provided with a plurality of processing stations during processing, one product is changed into a plurality of products, the number of times of clamping the products during processing is reduced, program linkage and batch processing are realized, and the program processing time of single products is reduced.

In this embodiment, the multi-station fixture 1000 further includes a clamping assembly 1300, the clamping assembly 1300 includes a plurality of clamping members 1310, the clamping assemblies 1300 correspond to the workpiece clamping mechanisms 1200 one by one, and the clamping members 1310 have a clamping stroke for clamping the interchangeable plate 1210 on the bottom plate 1100 and a releasing stroke for releasing the interchangeable plate 1210. The workpiece holding mechanism 1200 is connected to the base plate 1100 via the interchangeable plate 1210, and the workpiece holding mechanism 1200 can be attached and detached by attaching and detaching the interchangeable plate 1210. By providing the clamp assembly 1300 to clamp, fix, or release the interchangeable plate 1210, the attachment and detachment of the interchangeable plate 1210 to and from the base plate 1100 can be further simplified, and the attachment and detachment of the interchangeable plate 1210 to and from the base plate 1100 can be improved.

The clamping member 1310 may be a clamping cylinder, and a piston rod of the clamping cylinder is connected to a clamping block for clamping the interchangeable plate 1210. Thereby make the clamp splice remove through the flexible of piston rod, the piston rod drives the clamp splice when contracting to make the clamp splice butt with exchanging board 1210 centre gripping on exchanging board 1210, and the retraction stroke of piston rod is the clamping stroke promptly, drives the clamp splice when the piston rod stretches out and makes clamp splice and exchange board 1210 separate and exchange board 1210 and loosen exchanging board 1210, and the extension of piston rod forms the release stroke promptly.

Further, the clamp 1310 is a rotary clamping cylinder, which has a telescopic stroke and a rotary stroke. Thus, when the clamp block of the rotary clamp cylinder is at a position separated from the interchangeable plate 1210, there is no overlapping position between the clamp block and the interchangeable plate 1210, and the interference of the mounting and dismounting strokes of the clamp block with respect to the interchangeable plate 1210 can be effectively avoided.

Further, the clamping members 1310 of the same group of clamping assemblies 1300 can share one air source, so that the actions of the clamping members 1310 of the same group have good synchronism, stable clamping of the interchangeable plate 1210 can be realized, and especially when the interchangeable plate 1210 is clamped, the synchronism of the clamping members 1310 can ensure uniform stress of the interchangeable plate 1210, and the positioning accuracy of the interchangeable plate 1210 is ensured.

In other embodiments, the clamp 1310 may also be a clamping cylinder, which can provide a strong clamping force for the interchangeable plate 1210 with a small volume and a small working noise.

In this embodiment, the interchangeable plate 1210 is rectangular plate-shaped, and the set of clamping assemblies 1300 includes four clamping members 1310 respectively disposed at four corners of the interchangeable plate 1210, for example, at two ends of a set of opposite sides of the interchangeable plate 1210. Of course, the interchangeable plate 1210 may have other shapes, and the clamp 1310 of the clamp assembly 1300 may have a corresponding distribution according to the shape of the interchangeable plate 1210, so as to provide a stable and uniform clamping force to the interchangeable plate 1210 as much as possible.

Since the position of the interchangeable plate 1210 on the bottom plate 1100 is adjustable and the size of the interchangeable plate 1210 is replaceable on the bottom plate 1100, the position of the clamp 1310 of the clamp assembly 1300 on the bottom plate 1100 should also be adjustable and replaceable, and the clamp 1310 can be positioned by the positioning portion 1110 on the bottom plate 1100.

In this embodiment, the multi-station fixture 1000 further includes a supporting plate 1400, the clamping assembly 1300 is detachably connected to the base plate 1100 through the supporting plate 1400, and the supporting plate 1400 is positioned at different positions of the base plate 1100 through different positioning portions 1110; at least one set of clamping assemblies 1300 can be mounted on the pallet 1400, and the interchangeable plate 1210 is positioned on the pallet 1400. The pallet 1400 is positioned by the base plate 1100, and the pallet 1400 positions the interchangeable plate 1210, thereby positioning the interchangeable plate 1210 on the base plate 1100. The clamping assembly 1300 is mounted on the supporting plate 1400, the clamping assembly 1300 is positioned on the bottom plate 1100 through the positioning of the supporting plate 1400 relative to the bottom plate 1100, and the mounting position of the clamping assembly 1300 on the supporting plate 1400 corresponds to the position of the interchanging plate 1210 on the supporting plate 1400. Therefore, when the same product is processed, the interchangeable plate 1210 can be assembled and disassembled only by clamping and loosening the interchangeable plate 1210 through the clamping piece 1310; when different products are processed, the workpiece clamping mechanism 1200 and the clamping assembly 1300 are replaced together by assembling and disassembling the supporting plate 1400, and the line changing efficiency is improved.

One or more sets of clamping assemblies 1300 can be mounted on the supporting plate 1400, and as the clamping assemblies 1300 correspond to the workpiece clamping mechanisms 1200 one by one, the number of the workpiece clamping mechanisms 1200 on one supporting plate 1400 is at least one. Meanwhile, a plurality of pallets 1400 can be mounted on the base plate 1100, so that the multi-station jig 1000 becomes a multi-station jig. In this embodiment, two sets of clamping assemblies 1300 and two workpiece clamping mechanisms 1200 are mounted on one supporting plate 1400, two supporting plates 1400 are disposed on the base plate 1100, and the multi-station fixture 1000 has four stations.

As shown in fig. 5, the positioning portion 1110 on the bottom plate 1100 is a positioning hole, the bottom plate 1100 is further provided with a plurality of mounting holes 1120, the mounting holes 1120 are uniformly distributed on the bottom plate 1100 at intervals, the positioning portions 1110 are uniformly distributed on the bottom plate at intervals, and the positioning portions 1110 and the mounting holes 1120 are distributed at intervals. The base plate 1100 is attached to a component mounted thereon, in this embodiment a pallet 1400, by locating holes through mounting holes 1120. Meanwhile, the bottom plate 1100 is positioned with the machine tool through a positioning hole, and is connected through a mounting hole 1120. The accuracy requirement of the positioning holes is higher than that of the mounting holes 1120, thereby enabling the base plate 1100 to insert positioning pins through the positioning holes to achieve accurate positioning of the components mounted thereon. The spacing of the positioning holes from the mounting holes 1120 prevents interference between positioning and connection.

Further, a plurality of mounting holes 1120 are uniformly distributed on the bottom plate 1100 in a grid shape, the positioning holes are also uniformly distributed in a grid shape, but the grid density of the positioning holes is less than that of the mounting holes 1120, and the axis of each positioning hole falls on the central point of the smallest grid unit of the mounting hole 1120.

In this embodiment, the positioning holes are light holes, the accuracy is H7, pin positioning of other components is realized by inserting the bottom plate positioning pins 1130, the mounting holes 1120 are threaded holes, the accuracy may not be required, and connection and fixation of other components is realized by screwing the bottom plate bolts 1140.

The pallet 1400 is mounted on the base plate 1100 through a plurality of mounting holes 1120, the base plate 1100 is mounted on the machine tool through the mounting holes 1120, the pallet 1400 is positioned on the base plate 1100 through positioning holes, and the base plate 1100 is positioned on the machine tool through the positioning holes. By ensuring the position accuracy between the positioning holes on the base plate 1100 and the accuracy of the positioning holes themselves, it can be ensured that the supporting plate 1400 has higher positioning and mounting accuracy relative to the machine tool when the base plate 1100 is positioned on the machine tool and the supporting plate 1400 is positioned on the base plate 1100.

The bottom plate 1100 can be well positioned on the machine tool, so that when different supporting plates 1400 are mounted on the bottom plate 1100, the bottom plate 1100 can always provide a good positioning reference for the supporting plates 1400, and after the supporting plates 1400 are replaced, the positioning accuracy does not need to be corrected.

The positioning portion 1110 of the base plate 1100 may be a positioning hole, or may be a positioning boss.

Referring to fig. 6 and 7, the clamping assembly 1300 further includes a supporting member 1320, the supporting member 1320 is connected to the supporting plate 1400 and is used for supporting the interchangeable plate 1210, and a positioning structure is formed between the supporting member 1320 and the interchangeable plate 1210. Thus, the interchangeable plate 1210 achieves positioning on the pallet 1400 by positioning with the support 1320. The support member 1320 is attached to the plate 1400 and acts as a support for the interchangeable plate 1210. Since the clamping member 1310 has a certain height, if the interchangeable plate 1210 is directly placed on the supporting plate 1400, the thickness of the interchangeable plate 1210 is increased, which is inconvenient for disassembly and transportation. The supporting member 1320 is provided to compensate for the height of the clamping member 1310, so that the interchangeable plate 1210 can be made thinner. The supporting member 1320 may be a separate member connected to the supporting plate 1400 or an integrated boss formed on the supporting plate 1400, and the supporting member 1320 and the interchangeable plate 1210 have a positioning structure therebetween, but are not connected, and the interchangeable plate 1210 is clamped on the supporting member 1320 by the clamping of the clamping member 1310.

In this embodiment, two supporting members 1320 are disposed under one exchanging plate 1210, and are block-shaped, and the middle of the bottom surface is hollowed to reduce the influence of the flatness of the supporting members 1320 and the supporting plate 1400 on the connection stability of the two. Two support members 1320 are provided on a set of opposite sides of the interchangeable panel 1210, the corners of the support members 1320 fall on the corners of the interchangeable panel 1210, and the interchangeable panel 1210 is positioned by aligning with the four corners of the support members 1320 when placed on the support members 1320. The positioning structure between the interchangeable plate 1210 and the support 1320 is thus positioned in corner alignment. Of course, in other embodiments, the interchangeable plate 1210 and the support 1320 may be located with a boss and a groove or with a locating pin.

By ensuring the positional accuracy of the support members 1320 on the pallet 1400, it is possible to ensure the positional accuracy of the interchanging plate 1210 with respect to the pallet 1400, the positional accuracy of the interchanging plate 1210 with respect to the base plate 1100, and the positional accuracy of the interchanging plate 1210 with respect to the machine tool. And the positioning accuracy of the workpiece clamping and positioning of the workpiece clamping assembly 1220 on the interchanging plate 1210 is ensured, so that the workpiece is positioned step by step sequentially through the workpiece clamping assembly 1220, the supporting piece 1320, the supporting plate 1400 and the bottom plate 1100, and the positioning accuracy of the workpiece on the machine tool is ensured.

In this embodiment, the interchanging plate 1210 is provided with a positioning member 1211 and a positioning boss 1212, the positioning member 1211 is used for positioning one edge of the workpiece, and the positioning boss 1212 is used for positioning one adjacent edge of the edge, thereby positioning the workpiece and limiting the movement of the workpiece on two edges sharing a common corner. If the workpiece is rectangular, the positioning element 1211 and the workpiece clamping element 1220 are disposed on a pair of edges of the workpiece, and the positioning boss 1212 is disposed on an adjacent edge sandwiched by the pair of edges. The workpiece placed on the interchangeable plate 1210 is pre-positioned by the positioning of the positioning member 1211 and the positioning boss 1212, the workpiece holding assembly 1220 is disposed opposite to the positioning, and the workpiece holding assembly 1220 has a clamping stroke moving toward the positioning member 1211 and a releasing stroke moving away from the positioning member 1211.

The positioning members 1211 and the positioning bosses 1212 correspond to fixed gripping structures and the workpiece holding assembly 1220 corresponds to movable gripping structures, and when a workpiece is placed on the interchangeable plate 1210, the workpiece is positioned by the positioning members 1211 and the positioning bosses 1212 and then released by the clamping or unclamping of the workpiece holding assembly 1220.

The positioning element 1211 and the positioning boss 1212 may be integrally formed with the interchangeable plate 1210, and directly formed as a raised structure on the plate body of the interchangeable plate 1210. In this embodiment, the positioning element 1211, the positioning boss 1212 and the interchangeable plate 1210 are a split type assembly structure. The positioning member 1211 has a bar-shaped block shape and is attached to the interchangeable plate 1210 in the same manner as the supporting plate 1400 is attached to the base plate 1100, i.e., the positioning member 1211 is mounted to the interchangeable plate 1210 using a positioning hole (insertion positioning pin) and a connecting hole (screw-in bolt) to ensure the positioning accuracy on the interchangeable plate 1210. The locating boss 1212 is a raised feature attached to the interchangeable plate 1210.

Further, a cushion block 1213 is further arranged on the interchanging plate 1210, the cushion block 1213 is arranged between the interchanging plate 1210 and the workpiece, and the positioning boss 1212 is arranged on the cushion block 1213. The cushion block 1213 may be bolted to the interchanging plate 1210 and the positioning boss 1212 is a positioning pin inserted into the cushion block 1213. It should be noted that the pads 1213 do not interfere with the clamping of the workpiece by the workpiece clamping assembly.

The cushion block 1213 can compensate the thickness of the workpiece with the height of the positioning element 1211 and the workpiece clamping assembly, so as to lift the workpiece, and avoid the interference of the positioning element 1211, the positioning boss 1212 and the workpiece clamping assembly 1220 on the workpiece during processing.

Because the interchange plate 1210 and the supporting member 1320 are positioned by the edge angle, the cushion block 1213 and the interchange plate 1210 are directly connected by bolts, and the two positioning modes two without positioning pins have the advantages that: the manufacturing procedures of the multi-station clamp 1000 are reduced, the structure is simplified, and the manufacturing cost is reduced; the interchangeability and the adaptability of the multi-station clamp 1000 are enhanced. However, the two positioning modes can cause certain positioning accumulated errors, corresponding allowance can be reserved on the workpiece, and the shape and the size of the workpiece cannot be influenced as long as the processing program and the cutter have no problems.

It is understood that for a workpiece requiring high machining accuracy, the multi-station jig 1000 may be provided with positioning pins between the interchangeable plate 1210 and the support 1320, and positioning pins between the interchangeable plate 1210 and the cushion block 1213.

As shown in fig. 8, the workpiece clamping assembly 1220 includes a movable clamping block 1221 and a bolt 1222, the bolt 1222 includes a screw and a bolt head connected with each other, the screw passes through the movable clamping block 1221 and is connected to the interchanging plate 1210, and the bolt head and the movable clamping block 1221 form a slope fit therebetween, and the slope inclines downwards or upwards from a side close to the workpiece to a side far from the workpiece.

The head of the bolt forms a wedge-shaped fit with the movable clamping block 1221, the slope declining from the side closer to the workpiece to the side farther from the workpiece, whereby when the bolt 1222 is tightened against the interchanging plate 1210, the movable clamping block moves towards the side closer to the workpiece to clamp the workpiece, and when the bolt 1222 is loosened against the interchanging plate 1210, the movable clamping block moves away from the workpiece to release the workpiece.

It will be appreciated that if the length of the screw is long enough/the threaded length of the screw on the interchanging plate 1210 is long enough, that is, when the bolt 1222 provides a stable coupling force both for clamping and releasing the workpiece at the movable clamping block, the ramp on the clamping block can also be set to rise from the side closer to the workpiece to the side farther from the workpiece, so that when the bolt 1222 is loosened from the interchanging plate 1210, the movable clamping block moves closer to the workpiece to clamp the workpiece, and when the bolt 1222 is tightened against the interchanging plate 1210, the movable clamping block moves away from the workpiece to release the workpiece.

It can be understood that the distance between the screw and the workpiece is constant, and the distance between the movable clamping block 1221 and the workpiece is variable, so that there is a bidirectional movement between the screw and the movable clamping block 1221 along and perpendicular to the interchanging plate 1210, and the movable clamping block 1221 is provided with a strip-shaped through slot in the same moving direction as the movable clamping block 1221.

The axis of the screw rod can be vertically arranged relative to the interchanging plate 1210, and a wedge block/trapezoid block matched with the inclined surface of the movable clamping block 1221 can be clamped between the bolt head and the movable clamping block 1221, so that the reciprocating linear motion of the bolt head in the direction perpendicular to the interchanging plate 1210 can be changed into the reciprocating linear motion of the movable clamping block 1221 in the direction parallel to the interchanging plate 1210.

In this embodiment, the inclined surface of the movable clamping block 1221 is inclined downward from the side close to the workpiece to the side far from the workpiece. The movable clamping block 1221 is trapezoidal, the bottom surface of the movable clamping block is slidably disposed on the exchanging plate 1210, a strip-shaped through groove penetrating to the ground is disposed on the inclined surface of the movable clamping block, and the strip-shaped through groove is perpendicular to the inclined surface. The screw of the bolt 1222 passes through the through-bar slot perpendicular to the inclined plane and is then obliquely connected to the interchanging plate 1210, i.e. the inclination angle of the screw is the same as the inclination angle of the inclined plane of the movable clamping block 1221. In this way, the bottom surface of the bolt head and the inclined surface of the movable clamping block 1221 can be directly in inclined surface fit, and the movable clamping block 1221 can be adjusted in the moving position of the interchanging plate 1210 by screwing the bolt 1222. A washer 1223 may be provided between the bolt head and the movable clamping block 1221 to balance the force between the bolt head and the movable clamping block 1221, to transmit the force of the bolt head to the movable clamping block 1221 in a balanced manner, and to drive the movable clamping block 1221 to slide on the interchanging plate 1210. The gasket 1223 can be a nylon gasket with good wear resistance and lubricity.

In this embodiment, the positioning element 1211 is in a bar shape, and both sides of the positioning element 1211 are provided with the workpiece clamping assembly 1220 and the positioning boss 1212, so that one workpiece clamping mechanism 1200 can clamp two workpieces, and the number of stations of the multi-station fixture 1000 is further increased. At least one set of workpiece-holding assemblies 1220, 3 in this embodiment, is disposed on each side of the positioning member 1211.

The interchangeable plate 1210 is provided with a handle 1214 for facilitating application of force to facilitate handling of the interchangeable plate 1210, i.e., the workpiece holding mechanism 1200. In this embodiment, a handle 1214 is disposed on each of a set of opposing sides of the interchangeable plate 1210.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A multi-station clamp, comprising:

the base plate is provided with a plurality of positioning parts and can be positioned at different positions of the machine tool through different positioning parts; and

the workpiece clamping mechanism comprises an exchange plate and at least one workpiece clamping assembly arranged on the exchange plate, the workpiece clamping mechanism can be installed on the bottom plate in a plurality, the exchange plate can be positioned on different positions of the bottom plate through different positioning portions, the exchange plate is detachable relative to the bottom plate, and the workpiece clamping assembly is used for clamping workpieces on the exchange plate.

2. A multi-station clamp as claimed in claim 1, further comprising a clamping assembly, wherein the clamping assembly comprises a plurality of clamping members, the clamping members correspond to the workpiece clamping mechanisms one to one, and the clamping members have a clamping stroke for clamping the interchangeable plate on the bottom plate and a releasing stroke for releasing the interchangeable plate.

3. A multi-station clamp according to claim 2, further comprising a support plate, wherein the clamping assembly is detachably connected to the base plate through the support plate, the support plate is positioned at different positions on the base plate through different positioning parts, and the exchange plate is positioned on the support plate;

4. A multi-station clamp as claimed in claim 3, wherein the clamping assembly further comprises a support member connected to the support plate for supporting the interchangeable plate, and a positioning structure is formed between the support member and the interchangeable plate.

5. A multi-station clamp as claimed in claim 2, wherein said clamping means comprises a clamping cylinder.

6. A multi-station clamp according to claim 1, wherein the locating portion is a locating hole;

the precision of the positioning hole is higher than that of the mounting hole.

7. A multi-station clamp as claimed in claim 1, wherein the interchanging plate is provided with a positioning member and a positioning boss, the positioning member is used for positioning one edge of the workpiece, and the positioning boss is used for positioning one adjacent edge of the edge;

8. A multi-station clamp according to claim 7, wherein a cushion block is further arranged on the interchanging plate, the cushion block is arranged between the interchanging plate and the workpiece, and the positioning boss is arranged on the cushion block.

9. A multi-station clamp as claimed in claim 7, wherein the workpiece clamping assembly comprises a movable clamping block and a bolt, the bolt comprises a screw and a bolt head which are connected with each other, the screw passes through the movable clamping block and is connected to the exchange plate, and an inclined surface which inclines downwards or upwards from one side close to the workpiece to one side far away from the workpiece is formed between the bolt head and the movable clamping block.

10. A multi-station clamp according to claim 1, wherein said interchangeable plates are provided with handles.