CN216608067U - Machining universal fixture - Google Patents

Abstract

The utility model discloses a universal fixture for machining, which comprises at least one group of clamping components, wherein each group of clamping component comprises a base, a stop block and a pressing block, the base is fixed on a workbench of an external machine tool, the stop block and the pressing block are oppositely arranged on one side of the base, which is far away from the workbench, the bottom of the stop block is connected with the base, the pressing block is detachably connected with the base through a fastening piece, one side of the pressing block, which is far away from the stop block, is provided with an inclined plane which inclines towards the base, a through chute is arranged on the inclined plane, the chute is vertically arranged with the inclined plane, the base is provided with a plurality of threaded holes which are vertical to the inclined plane, and the fastening piece penetrates through the chute and is screwed with the threaded holes. According to the universal clamp for machining, the two opposite side walls of the workpiece are respectively abutted against the stop block and the pressing block, the fastener penetrates through the sliding groove to be screwed with the threaded hole in the base, and due to the existence of the inclined surface, the pressing block is fixed on the base and simultaneously clamps the workpiece in the process that the fastener is screwed with the threaded hole.

Description

Machining Universal Fixtures

technical field

The utility model relates to the technical field of machining, in particular to a universal clamp for machining.

Background technique

With the development of science and technology, CNC machine tool processing is increasingly welcomed by the manufacturing industry because of its processing efficiency and processing accuracy. And CNC equipment occupies most of the share in CNC locomotives. By machining the workpiece on the CNC, the workpiece needs to be fixed on the table of the machine tool. There are three ways to fix the workpiece on the table. Clamping is inconvenient and unreliable, the workpiece is easily unstable during processing, which affects the machining accuracy; the second is to use a vise to clamp, fix the vise on the workbench, and then clamp it with a vise Workpieces, this way of clamping is because the weight of the vise itself is relatively large, and the force of the worker is required to be larger when clamping the vise, and it is easy to cause injury. In addition, the clamping block on the vise is driven by a screw rod. Yes, when the workpiece needs to be clamped, it is necessary to turn the screw rod of the vise to open the vise and clamp the workpiece, and the clamping efficiency is low; The workpiece is clamped on a special fixture. The special fixture has the characteristics of accurate positioning and high clamping efficiency, but the special fixture is suitable for mass production. For the processing of workpieces with small batches, the development cost of special fixtures is too high.

Utility model content

The purpose of the utility model is to provide a general machining fixture with simple structure, convenient clamping and wide application range, so as to overcome the deficiencies in the prior art.

In order to achieve the above object, the utility model provides the following technical solutions:

A universal jig for machining, comprising at least one set of clamping assemblies, a single set of the clamping assemblies includes a base, a stopper and a pressing block, the base is fixed on an external workbench of a machine tool, and the stopper is connected to all the clamps. The pressure block is relatively arranged on the side of the base away from the workbench, the bottom of the stopper is connected to the base, the pressure block is detachably connected to the base through a fastener, and the pressure block is detachably connected to the base. The side away from the block is provided with an inclined surface inclined towards the base, the inclined surface is provided with a through chute, the chute is perpendicular to the inclined surface, and the base is provided with a number of A threaded hole with a vertical inclined plane, the fastener penetrates the sliding slot and is screwed with the threaded hole.

In one embodiment, the block and the base are integrally formed, and a hollow groove is provided at the connection between the block and the base.

In one embodiment, the block and the base are connected by fasteners, and the bottom of the block close to the pressing block is provided with a chamfer.

In one of the embodiments, the bottom of the pressing block on the side close to the blocking block is provided with a chamfer.

In one embodiment, the stopper is provided with a holding part for holding the workpiece and a clamping part for positioning the workpiece, and the bottom of the holding part is connected with the holding part.

In one embodiment, a hollow groove is provided at the connection between the clamping portion and the supporting portion.

In one embodiment, the clamping assembly further includes a spacer block for supporting the workpiece, and the spacer block is arranged between the stop block and the pressing block.

In one of the embodiments, the machining universal jig further includes a fixing plate, the fixing plate is mounted on the worktable, and the base is mounted on the fixing plate.

In one embodiment, a positioning block is provided on the fixing plate, and the positioning block is used to assist the positioning of the base.

In one embodiment, the clamping assemblies are three groups, and the three groups of clamping assemblies are installed on the fixed plate at intervals.

Compared with the prior art, the beneficial effects of the present utility model are as follows:

In the universal fixture for machining of the utility model, the workpiece is placed between the stopper block and the pressure block, so that the opposite two side walls of the workpiece are respectively abutted with the stopper block and the pressure block, and then the fastener is passed through the chute and on the base. The threaded hole is screwed together. Due to the existence of the inclined surface, a lateral component force applied to the workpiece and a vertical component force to lock the pressure block on the base will be generated during the process of screwing the fastener with the threaded hole, so the pressure The cooperation of the block and the stop block can firmly fix the workpiece, and has the characteristics of simple structure, convenient clamping and reliable clamping.

Description of drawings

Fig. 1 is the structural schematic diagram of the general fixture for machining of the first embodiment of the present invention;

FIG. 2 is a cross-sectional view of the base, the stopper and the pressing block in the universal jig for machining shown in FIG. 1 along the central axis along the length direction of the base.

Description of the attached drawings:

Universal jig 100 for machining;

Clamping assembly 10 , base 11 , threaded hole 111 , stopper 12 , supporting portion 121 , clamping portion 122 , avoidance groove 13 , pressing block 14 , chute 141 , cushion block 15 ; fixed plate 20 , positioning block 21 .

Detailed ways

In order to make the above objects, features and advantages of the present utility model more clearly understood, the specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not subject to the specific embodiments disclosed below. limit.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When the number of an element is referred to as being "plural", it can be any number of two or more. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The present utility model will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings:

As shown in FIG. 1 and FIG. 2 , it is a general machining fixture 100 according to a preferred embodiment of the present invention, comprising at least one set of clamping components 10 , and a single set of clamping components 10 includes a base 11 , a stopper 12 and The pressure block 14 and the base 11 are fixed on the workbench of the external machine tool. The stopper 12 and the pressure block 14 are oppositely arranged on the side of the base 11 away from the workbench. The bottom of the stopper 12 is connected with the base 11. The firmware is detachably connected to the base 11, and has the characteristics of simple structure, convenient clamping and reliable clamping.

As shown in FIG. 1 , a single set of clamping assemblies 10 includes a base 11 , a stopper 12 and a pressing block 14 . The base 11 is fixed on the table of the machine tool by bolts, and the bottom of the stopper 12 is connected to the upper end surface of the base 11 , preferably Ground, the stopper 12 is arranged at one end of the base 11; further, the stopper 12 can be integrally formed with the base 11, and the stopper 12 and the base 11 can also be a separate structure. In this embodiment, the stopper 12 and the base 11 are integrated forming. When the stopper 12 and the base 11 are integrally formed, in order to avoid interference with the edge of the workpiece at the connection between the stopper 12 and the base 11 , a hollow groove 13 is provided at the connection between the stopper 12 and the base 11 ; 11 is a split structure, the stopper 12 and the base 11 are connected by bolts, in order to avoid interference with the edge of the workpiece at the connection between the stopper 12 and the base 11, the bottom of the stopper 12 close to the pressing block 14 is provided with a chamfer. In a specific embodiment, when the height of the stopper 12 is relatively high, in order to adapt to workpieces with different clamping thicknesses, the stopper 12 is provided with a stepped structure, and the support portion 121 is parallel to the upper end surface of the base 11 , The clamping part 122 is perpendicular to the upper end surface of the base 11 , the supporting part 121 is used to support the workpiece, and the clamping part 122 is used to locate the workpiece; similarly, in order to avoid the connection between the clamping part 122 and the supporting part 121 When the workpiece interferes, the connection between the clamping part 122 and the supporting part 121 is provided with a hollow groove 13 .

As shown in FIG. 1 and FIG. 2 , the pressure block 14 and the stopper 12 and the pressure block 14 are disposed opposite to the side of the base 11 away from the workbench, and the pressure block 14 is detachably connected to the base 11 through fasteners. In order to avoid pressure The edge of the bottom of the block 14 interferes with the workpiece, and the bottom of the pressing block 14 is provided with a chamfer on the side close to the stopper 12; A through chute 141 is provided. The chute 141 is perpendicular to the inclined surface. The base 11 is provided with a number of threaded holes 111 perpendicular to the inclined surface. By arranging the chute 141, the fastener can slide in the chute 141, so as to adjust the position of the pressure block 14, so that the pressure block 14 can better clamp the workpiece in cooperation with the stopper 12. By setting the inclined surface, the tightening force generated when the fastener is screwed into the threaded hole 111 can be decomposed into a lateral component force applied to the workpiece and a vertical component force that locks the pressing block 14 on the base 11, While the pressure block 14 is tightly connected with the base, the cooperation between the pressure block 14 and the stopper 12 can firmly fix the workpiece; in this embodiment, the fastener for locking the pressure block 14 is a bolt.

Optionally, in order to make the pressing block 14 suitable for clamping workpieces with different thicknesses, the same stepped structure as that on the stopper 12 can be provided on the pressing block 14. Considering that the pressing block 14 is provided with a slope, the stepped structure is When the thickness of the pressure block 14 is small, the strength of the pressure block 14 may be insufficient. Therefore, in a specific embodiment, the clamping assembly 10 further includes a spacer block 15 for supporting the workpiece. Between the stopper 12 and the pressing block 14, when clamping the workpiece, the lower end surface of the cushion block 15 abuts against the base 11, and the upper end surface abuts the workpiece, which makes the workpiece clamping more stable and reliable.

As shown in FIG. 1 , the number of clamping assemblies 10 and the distance between two adjacent groups of clamping assemblies 10 can be adjusted according to the size of the workpiece to be clamped, because the spacing of the locking grooves on the machine table is fixed , in order to facilitate the adjustment of the number of clamping assemblies 10 and the distance between the two adjacent groups of clamping assemblies 10, the universal jig 100 for machining also includes a fixing plate 20, the fixing plate 20 is installed on the workbench by bolts, and the base 11 It is mounted on the fixing plate 20 by bolts. The fixing plate 20 is provided with several threaded holes for installing the base 11 , so as to adjust the number of the clamping assemblies 10 and the arrangement of the clamping assemblies 10 according to actual requirements. Further, in order to facilitate positioning when the base 11 is installed on the fixing plate 20 , the fixing plate 20 is provided with a positioning block 21 , and the positioning block 21 is used to assist the positioning of the base 11 . Considering that if the spacer block 15 is movable, during mass production, each time the workpiece is clamped, the spacer block 15 may be displaced, which will affect the clamping efficiency. Therefore, during mass production, the spacer block 15 can pass the bolts. fixed on the fixing plate. In this embodiment, there are three groups of clamping assemblies 10 , and the three groups of clamping assemblies 10 are installed on the fixed plate 20 at intervals.

When clamping the workpiece, according to the size of the workpiece to be clamped, select the appropriate number of clamping components 20 and the distance between the adjacent clamping components 20, and choose whether to add spacers as needed, and then place the workpiece in the The upper end face of the base 11, and the side wall of the workpiece is in contact with the side wall of the stopper 12, and then the pressing block 14 is moved toward the workpiece, so that the side wall of the pressing block 14 is in contact with the workpiece, and then the fastener is locked, The pressing block 14 is tightly fixed with the base 11 while pressing the workpiece, and the workpiece clamping is completed.

In the universal jig 100 for machining of the present invention, the workpiece is placed between the stopper 12 and the pressure block 14, so that the opposite two side walls of the workpiece are in contact with the stopper 12 and the pressure block 14 respectively, and then the fastener is passed through The chute 141 is screwed with the threaded hole 111 on the base 11. Due to the existence of the inclined plane, a lateral component force applied to the workpiece will be generated during the screwing of the fastener with the threaded hole 111 and a force will be generated to lock the pressing block 14. The vertical component of the force on the base 11, so the cooperation of the pressing block 14 and the stopper 12 can firmly fix the workpiece, and has the characteristics of simple structure, convenient clamping and reliable clamping.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present utility model, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the utility model patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for this utility model shall be subject to the appended claims.

Claims (10)

1. The utility model provides a machining universal fixture, its characterized in that includes at least a set of centre gripping subassembly, singly organize centre gripping subassembly includes base, dog and briquetting, the base is fixed on the workstation of outside lathe, the dog with the briquetting sets up relatively the base is kept away from one side of workstation, the bottom of dog with the base is connected, the briquetting pass through the fastener with the base can be dismantled and be connected, the briquetting is kept away from dog one side is equipped with the court the inclined plane of base slope, be equipped with the spout that link up on the inclined plane, the spout with the inclined plane sets up perpendicularly, be equipped with on the base a plurality of with inclined plane vertically screw hole, the fastener is worn to establish the spout with the screw hole spiral shell closes.

2. The universal machining fixture of claim 1, wherein the stop is integrally formed with the base, and a clearance groove is formed at a connection between the stop and the base.

3. The universal machining fixture of claim 1, wherein the stop is connected to the base by a fastener, and a chamfer is provided on a bottom of the stop on a side thereof adjacent to the press block.

4. The universal machining fixture of claim 1, wherein a bottom of the pressing block on a side close to the stopper is chamfered.

5. The universal machining fixture of claim 1, wherein the stop block is provided with a supporting portion for supporting the workpiece and a clamping portion for positioning the workpiece, and a bottom of the clamping portion is connected to the supporting portion.

6. The universal machining fixture of claim 5, wherein a clearance groove is formed at the joint of the clamping portion and the supporting portion.

7. The universal machine tool clamp of claim 1 wherein said clamping assembly further comprises a pad for holding a workpiece, said pad being disposed between said stop and said press block.

8. The universal machining fixture of claim 1 further comprising a fixed plate mounted on said table, said base being mounted on said fixed plate.

9. The universal machining fixture of claim 8, wherein a positioning block is disposed on the fixing plate, and the positioning block is used for assisting in positioning the base.

10. A universal machine tool clamp as claimed in claim 8, wherein said clamping assemblies are in three groups, the three groups being spaced apart on said fixed plate.

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