CN217668051U - Anchor clamps and CNC processing equipment - Google Patents

Abstract

The application discloses anchor clamps and CNC processing equipment, anchor clamps include pedestal, locating piece and clamping part, and the locating piece is fixed to be set up in the pedestal, slider sliding connection pedestal, and one side that the slider is close to the locating piece is provided with flexible backing plate, work piece and places on the pedestal. The push block is provided with a first inclined surface, the slide block is provided with a second inclined surface corresponding to the first inclined surface, the slide block is arranged on one side of the push block, the push-pull rod component drives the push block to move so that the push block pushes the slide block to slide, the slide block drives the flexible base plate to abut against one side of the workpiece, and the other side of the workpiece abuts against the positioning block, so that the workpiece is fixed. The first inclined plane and the second inclined plane are matched, so that the stroke of the sliding block can be controlled conveniently, the flexible base plate can be in flexible contact with a workpiece, the workpiece is prevented from being intensively pressed, and the surface damage of the workpiece caused by the fixture is reduced when the workpiece is fixed by the fixture.

Description

Anchor clamps and CNC processing equipment

Technical Field

The application relates to the technical field of workpiece fixing devices, in particular to a fixture and CNC (computer numerical control) machining equipment.

Background

The workpiece needs to be held by the fixture in a correct position for machining the product, for example CNC machining. In the related art, in order to stabilize a product in a machining process, a clamp needs to clamp a workpiece, so that the workpiece is prone to surface damage such as clamping damage, scratch or bruise. Further, before CNC machining is performed on a workpiece, the workpiece may be subjected to surface treatment in a previous process, for example, anodizing the workpiece, and thus surface damage of the workpiece may cause the workpiece to be a defective product.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving at least one of the problems in the prior art. To this end, the present application proposes a jig capable of reducing surface damage of a product.

The application also provides CNC processing equipment with the clamp.

A clamp according to an embodiment of the first aspect of the present application, comprising: a seat body, a positioning block and a clamping component,

the positioning block is fixedly arranged on the seat body;

the clamping part comprises a sliding block, a flexible base plate, a pushing block and a pushing rod component, the sliding block is slidably connected with the base body, the sliding block and the positioning block are enclosed to form a fixed position, the flexible base plate is arranged on one side, close to the fixed position, of the sliding block, a first inclined plane is formed on the pushing block, a second inclined plane corresponding to the first inclined plane is formed on the sliding block, the pushing rod component is in driving connection with the pushing block and used for enabling the pushing block to push or keep away from the sliding block, and when the pushing block pushes the sliding block, the pushing block can be pushed to be close to the fixed position through the matching of the first inclined plane and the second inclined plane.

According to the clamp of the embodiment of the application, at least the following beneficial effects are achieved:

the positioning block is fixedly arranged on the base body, the sliding block is connected with the base body in a sliding mode, a flexible base plate is arranged on one side, close to the positioning block, of the sliding block, and the workpiece is placed on the base body. The push block is provided with a first inclined surface, the slide block is provided with a second inclined surface corresponding to the first inclined surface, the slide block is arranged on one side of the push block, the push-pull rod component drives the push block to move so that the push block pushes the slide block to slide, the slide block drives the flexible base plate to abut against one side of the workpiece and abut against the other side of the workpiece on the positioning block, and therefore the workpiece is fixed. The first inclined plane and the second inclined plane are matched, so that the stroke of the sliding block can be controlled conveniently, the flexible base plate can be in flexible contact with a workpiece, the workpiece is prevented from being intensively pressed, and the surface damage of the workpiece caused by the fixture is reduced when the workpiece is fixed by the fixture.

According to some embodiments of the application, the fixture further comprises a vacuum adsorption component, wherein the seat body is provided with an adsorption hole, the position of the adsorption hole corresponds to the fixing position, and the vacuum adsorption component is communicated with the adsorption hole.

According to some embodiments of the application, the push-pull rod member includes a rod member and a driving assembly, the seat body is provided with a through hole, the rod member passes through the through hole, the driving assembly is connected with the push block through the rod member, the rod member is arranged along the vertical direction, the driving assembly is arranged below the seat body, and the positioning block, the sliding block and the push block are arranged above the seat body.

According to some embodiments of the application, the upper end surface of the seat body is further formed with a plurality of guide blocks, the guide blocks extend along the vertical direction, and the guide blocks are connected with the push blocks in a sliding mode so that the push blocks move along the vertical direction.

According to some embodiments of the application, the fixture further comprises an elastic member, the elastic member is connected with the base body, and the elastic member is used for resetting the sliding block.

According to some embodiments of the application, the base body is further provided with a slag discharge hole which is communicated with the through hole.

According to some embodiments of the application, be provided with the guide holder on the pedestal, be formed with the second spout on the guide holder, the second spout extends along the slip direction of slider, is formed with the inserted block on the side of slider, and the inserted block passes through second spout sliding connection guide holder.

According to some embodiments of the application, the connecting groove has been seted up on the side that the slider is close to the locating piece, and flexible backing plate detachably sets up in the connecting groove.

According to some embodiments of the application, the base body is further provided with a positioning groove, the positioning block is partially placed in the positioning groove, the side face of the positioning block is abutted against the groove wall of the positioning groove, and the positioning block is detachably connected with the base body.

A CNC machining apparatus according to an embodiment of the second aspect of the present application includes the fixture of the embodiment of the first aspect described above.

According to the CNC processing equipment of the embodiment of the application, at least the following beneficial effects are achieved: the CNC machining device of the embodiment of the second aspect has all the advantages of the clamp of the embodiment of the first aspect, and the description is omitted here.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The present application is further described with reference to the following figures and examples, in which:

FIG. 1 is a schematic view of the overall structure of a clamp according to an embodiment of the present application;

FIG. 2 is a schematic top view of the fixture of FIG. 1;

FIG. 3 is a cross-sectional structural view of the fixture of FIG. 2;

FIG. 4 is a schematic view of another state of the clamp of FIG. 3;

FIG. 5 is a schematic view of the structure of the fixing member of FIG. 1;

FIG. 6 is another schematic view of the securing element of FIG. 5;

FIG. 7 is a cross-sectional structural view of the fixture of FIG. 3;

FIG. 8 is a cross-sectional structural view of another state of the clamp of FIG. 7;

fig. 9 is a schematic structural diagram of a workpiece according to an embodiment of the present application.

Reference numerals:

the clamping device comprises a clamping component 100, a push block 110, a first inclined surface 111, a sliding block 120, a second inclined surface 121, a stop block 122, an insertion block 123, a connecting groove 124, a flexible backing plate 125, a rod 131 and a driving component 132;

a vacuum adsorption assembly 200;

the device comprises a base body 300, an adsorption hole 310, a through hole 320, a deslagging hole 330, a guide block 340, a first sliding groove 350, an elastic piece 360, a guide base 370, a second sliding groove 380 and a positioning groove 390;

a workpiece 400;

and a positioning block 500.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, 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 functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it should be understood that the positional descriptions referred to, for example, the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.

In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present number, and the above, below, within, etc. are understood as including the present number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present application, unless otherwise specifically limited, terms such as set, installed, connected and the like should be understood broadly, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present application in combination with the specific contents of the technical solutions.

In the description of the present application, reference to the description of "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc., means 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 present application. In this specification, the schematic representations of the terms used above do not necessarily 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.

A clip according to an embodiment of the first aspect of the present invention will be described with reference to fig. 1 to 9.

Referring to fig. 1 to 9, the clip of the present embodiment includes: a base body 300, a positioning block 500 and a clamping component 100.

It can be understood that the clamp of the present application clamps the workpiece 400 by placing the workpiece 400 on the seat body 300 with the workpiece 400 between the positioning block 500 and the clamping unit 100 through the cooperation of the clamping unit 100 and the positioning block 500.

The positioning block 500 is fixedly arranged on the base 300; specifically, the holder body 300 is disposed in the direction of the horizontal plane. Specifically, the positioning block 500 has a structure like a rectangular parallelepiped. When the clamping member 100 and the positioning block 500 are engaged to clamp the workpiece 400, the positioning block 500 abuts against one side of the workpiece 400.

Referring to fig. 5, the clamping unit 100 includes a slider 120, a flexible pad 125, a push block 110, and a push-pull rod member, specifically, a cylinder, and it is understood that the push-pull rod member may be driven by a linear driving motor.

Referring to fig. 5, the slider 120 is slidably connected to the base 300, the slider 120 and the positioning block 500 enclose to form a fixing position, the flexible cushion plate 125 is disposed on one side of the slider 120 close to the fixing position, and the first inclined plane 111 is formed on the pushing block 110, specifically, the first inclined plane 111 is formed on a side surface of the pushing block 110 close to the positioning block 500.

The slider 120 is formed with a second inclined surface 121 corresponding to the first inclined surface 111, specifically, the workpiece 400 is placed on the seat 300, the push-pull rod member is drivingly connected to the push block 110 for pushing the push block 110 or moving away from the slider 120, when the push block 110 pushes the slider 120, the push block 110 can push the slider 120 to approach the fixed position through cooperation of the first inclined surface 111 and the second inclined surface 121, and the push block 110 pushes the workpiece 400 to abut against the positioning block 500.

With reference to fig. 8, it should be understood that, through the cooperation of the first inclined surface 111 and the second inclined surface 121, the motion of the push-pull rod member driving the slider 120 is converted into the sliding of the slider 120 on the seat 300, so that the sliding stroke of the slider 120 can be controlled by controlling the moving stroke of the push block 110, and further, the stroke of the slider 120 can be controlled by controlling the sliding stroke of the slider 120, thereby preventing the push-pull rod member from directly driving the slider 120, resulting in difficulty in controlling the pressure of the slider 120 on the workpiece 400, and thus reducing the damage to the surface of the workpiece 400. It should also be understood that when the push block 110 pushes the slide block 120 to move through the cooperation of the first inclined surface 111 and the second inclined surface 121, the slide block 120 has the farthest movable stroke, and when the workpiece 400 is a thin-walled workpiece, the slide block 120 does not excessively push the side wall of the workpiece 400 to deform, so that damage to the workpiece 400 can be avoided.

It should be appreciated that after the workpiece 400 is secured to the fixture, the workpiece 400 is further CNC machined, such as by milling grooves into the workpiece 400, and the workpiece 400 is subjected to vibration during machining of the workpiece 400, the flexible pad 125 of this embodiment absorbs and eliminates the vibration of the workpiece 400, thereby reducing the risk of damage to the surface of the workpiece 400.

The drive form for the clamping member 100 has at least four forms, specifically:

the first drive form is: with reference to fig. 3, it will be appreciated that the push-pull rod member may drive the push block 110 to move in a vertical direction. Specifically, referring to fig. 5, the first inclined surface 111 is inclined from the direction in which the push-pull rod pushes the push block 110 toward the outer normal direction of the side surface of the push block 110. The first driving type of the clamping component 100 moves such that when the push-pull rod member pulls the push block 110 to move downward, the push block 110 pushes the slide block 120 to slide toward the positioning block 500, so that the slide block 120 presses the workpiece 400. When the push-pull rod member pushes the push block 110 to move upward, the push block 110 moves away from the slide block 120, so that the slide block 120 no longer presses the workpiece 400. Because the pulling force of the cylinder is determined by the atmospheric pressure when the type of the cylinder is determined, the maximum pulling force received by the pushing block 110 and thus the maximum pressure of the sliding block 120 on the workpiece 400 can be conveniently controlled.

The second drive form is: as will be understood from fig. 6, the second driving type differs from the first driving type in that the first inclined surface 111 is inclined toward the inner normal direction of the side surface of the push block 110 from the direction in which the push-pull rod pushes the push block 110. The second driving type of the clamping unit 100 moves such that when the push-pull rod member pushes the push block 110 upward, the push block 110 pushes the slide block 120 to slide toward the positioning block 500, so that the slide block 120 presses the workpiece 400. When the push-pull rod member pulls the push block 110 downward, the push block 110 moves away from the slide block 120, so that the slide block 120 no longer presses the workpiece 400.

The third drive form is: with reference to fig. 4, it will be further understood that the first inclined surface 111 and the second inclined surface 121 are inclined in the same direction as the first driving manner, and the third driving manner is different from the first driving manner in that the push-pull rod member can drive the push block 110 to move in the horizontal direction, so that the push-pull rod member can be directly fixed on the upper end surface of the seat body 300, and thus the machining of the seat body 300 can be reduced.

The fourth drive form is: referring to fig. 4, the first inclined surface 111 and the second inclined surface 121 are inclined in the same direction as the second driving type, and the fourth driving type is different from the second driving type in that the push-pull rod member can drive the push block 110 to move in the horizontal direction.

Specifically, the positioning block 500 may be made of a PEEK material having a self-lubricating property, so that the positioning block 500 does not damage the surface of the workpiece 400 when abutting against the workpiece 400. Specifically, the flexible pad 125 is made of a high-strength rubber material, and the high-strength rubber has elasticity, so that the surface of the workpiece 400 is not damaged when the slider 120 pushes the flexible pad 125 to fix the workpiece 400.

It should be appreciated that the second ramp 121 follows the first ramp 111. When the push block 110 pushes the slide block 120 to slide through the first inclined plane 111, the slide block 120 drives the flexible backing plate 125 to abut against one side of the workpiece 400, and the other side of the workpiece 400 abuts against the positioning block 500, so that the workpiece 400 is positioned and fixed; when the push block 110 is far away from the slide block 120, the workpiece 400 is loosened, so that the operator can take out the workpiece 400.

Referring to fig. 7 and 8, in order to further prevent the surface of the workpiece 400 from being damaged, the fixture further includes a vacuum adsorption assembly 200, the base 300 is provided with an adsorption hole 310, the position of the adsorption hole 310 corresponds to the fixed position, and the vacuum adsorption assembly 200 is communicated with the adsorption hole 310.

It should be understood that the vacuum absorption assembly 200 can fix the lower end surface of the workpiece 400, so as to provide a fixing force of the workpiece 400 in the vertical direction, and can reduce the lateral force required for fixing the workpiece 400, thereby reducing the pressure of the slider 120 on the workpiece 400, and thus reducing the risk of damaging the surface of the workpiece 400. Specifically, a sealing groove may be formed in the base 300, the sealing groove is disposed around the suction hole 310, and a sealing washer is disposed in the sealing groove, so as to increase the suction force of the vacuum suction assembly 200 on the workpiece 400.

When the workpiece 400 is fixed, the workpiece 400 is placed on the suction hole 310, the vacuum suction assembly 200 operates, suction force is generated through the suction hole 310, and the slider 120 is then engaged with the positioning block 500 to fix the side surface of the workpiece 400. Therefore, the workpiece 400 is prevented from being separated from the adsorption hole 310 and being incapable of being adsorbed after the workpiece 400 is fixed by the slider 120 and the positioning block 500.

When the workpiece 400 is taken out, the slider 120 firstly releases the side of the workpiece 400, and the vacuum adsorption assembly 200 stops working, thereby facilitating the taking out of the workpiece 400. Thereby preventing the workpiece 400 from being displaced by the slider 120.

Referring to fig. 7 and 8, for the specific structure of the push-pull rod member, the push-pull rod member includes a rod 131 and a driving assembly 132, a through hole 320 is formed in the seat body 300, the rod 131 passes through the through hole 320, the driving assembly 132 is connected to the push block 110 through the rod 131, the rod 131 is disposed along the vertical direction, the driving assembly 132 is disposed below the seat body 300, and the positioning block 500, the sliding block 120 and the push block 110 are disposed above the seat body 300.

Specifically, the arrangement can make the clamp more compact, avoid too many parts on the seat body 300 and reduce the interference in processing the workpiece 400. Specifically, the push block 110 may be detachably connected to the rod 131 by a fastener, thereby facilitating replacement of push blocks 110 of different lengths to fit different workpieces 400. It should be understood that the slider 120 is detachably coupled to the housing 300, thereby facilitating replacement of the slider 120.

Referring to fig. 7 and 8, in order to make the movement direction of the push block 110 correct, a plurality of guide blocks 340 are further formed on the upper end surface of the base body 300, the guide blocks 340 extend in the vertical direction, and the guide blocks 340 are slidably connected with the push block 110 so as to make the push block 110 move in the vertical direction.

Specifically, the guide block 340 is disposed around the push block 110, and when the rod 131 drives the push block 110 to move along the vertical direction, the guide block 340 can guide the push block 110. The guide block 340 also acts as a stop for the push block 110 when the push block 110 pushes against the slider 120, thereby preventing the rod 131 from bending due to the reaction force applied to the push block 110, and protecting the push block 110 and the push-pull rod member.

Referring to fig. 5 and 8, in order to automatically reset the slider 120, the clamping apparatus further includes an elastic member 360, the elastic member 360 is connected to the housing 300, and the elastic member 360 is used to reset the slider 120.

Specifically, the base 300 is provided with a first sliding slot 350, the first sliding slot 350 extends along the sliding direction of the slider 120, the bottom surface of the slider 120 is formed with a stopper 122, the stopper 122 is located in the first sliding slot 350, and two ends of the elastic element 360 respectively abut against a slot wall of the first sliding slot 350 and one side of the stopper 122.

Specifically, the elastic member 360 is a spring, one end of the spring abuts against one side of the stopper 122 close to the positioning block 500, and the other end of the spring abuts against a groove wall of the first sliding groove 350. When the pushing block 110 pushes the sliding block 120 to move from the initial position to the positioning block 500, the elastic member 360 is contracted. When the push block 110 moves away from the slider 120, the elastic member 360 rebounds and returns the slider 120 to the original position. Thereby facilitating removal of the workpiece 400.

Referring to fig. 7 and 8, in order to avoid the influence of the cutting chips on the movement, the base 300 is further provided with a slag discharge hole 330, and the slag discharge hole 330 is communicated with the through hole 320.

Specifically, in the CNC machining process of the workpiece 400, cutting chips that splash may be generated and may fall through the slag discharge hole 330, so that the cutting chips may be prevented from being caught between the rod 131 and the through hole 320. It should be appreciated that the drain holes 330 also facilitate the flow of cutting fluid, avoiding the cutting fluid from being retained on the seat 300. Specifically, the slag discharge holes 330 may be disposed between the guide blocks 340, thereby facilitating the slag discharge holes 330 to communicate with the through-holes 320.

Referring to fig. 5 and 7, in order to guide the movement of the slider 120, the base body 300 is provided with a guide base 370, the guide base 370 is formed with a second sliding groove 380, the second sliding groove 380 extends along the sliding direction of the slider 120, the side surface of the slider 120 is formed with an insertion block 123, and the insertion block 123 is slidably connected to the guide base 370 through the second sliding groove 380.

Specifically, the second sliding groove 380 is disposed along a horizontal plane, and the guide seat 370 can guide the movement of the sliding block 120 and prevent the sliding block 120 from deflecting after pressing the workpiece 400. Specifically, the guide holder 370 includes two guide plates, on which the second sliding groove 380 is formed, and the two guide plates are respectively disposed at both sides of the slider 120.

Referring to fig. 5, in order to facilitate replacement of the flexible pad 125, the side of the slider 120 close to the positioning block 500 is provided with a connecting groove 124, and the flexible pad 125 is detachably disposed in the connecting groove 124.

Specifically, the connecting grooves 124 can increase the thickness of the flexible pallet 125, thereby making the flexible pallet 125 more elastic. The connecting groove 124 can facilitate detachment of the flexible backing plate 125, can facilitate replacement of a damaged flexible backing plate 125, and can also facilitate selection of different flexible backing plates 125 for different workpieces 400.

Referring to fig. 3 and 4, in order to make the positioning block 500 more stable, the base 300 further has a positioning groove 390, the positioning block 500 is partially disposed in the positioning groove 390, a side surface of the positioning block 500 abuts against a groove wall of the positioning groove 390, and the positioning block 500 is detachably connected to the base 300.

Specifically, the shape of the horizontal section of the positioning groove 390 and the shape of the horizontal section of the positioning block 500 are identical. The positioning groove 390 can make the positioning element and the base 300 better fixed, and when the pushing block 110 pushes the workpiece 400 to one side of the workpiece 400 to press the positioning element 500, the groove wall of the positioning groove 390 can abut against the positioning element, thereby preventing the positioning element from moving. The positioning piece is detachably connected with the base body 300, so that the positioning piece can be conveniently replaced. It should be understood that a plurality of positioning members can be disposed on the seat 300, when different workpieces 400 need to be fixed, an operator can detach some of the positioning members, so that workpieces 400 with different shapes can also be placed in the fixing positions, and the positioning groove 390 does not obstruct the placement of the workpieces 400, thereby increasing the versatility of the fixture.

With reference to fig. 1 to 9, a CNC processing apparatus according to an embodiment of the second aspect of the present invention is described below, and the CNC processing apparatus according to the embodiment includes the fixture according to the above-described embodiment of the first aspect.

By providing the fixture of the first aspect embodiment in the CNC processing equipment of the second aspect embodiment, all the beneficial effects of the fixture of the first aspect embodiment are included, and the details are not repeated here.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

Claims (10)

1. The anchor clamps, its characterized in that includes:

a base body;

the positioning block is fixedly arranged on the seat body; and

the clamping component comprises a sliding block, a flexible base plate, a pushing block and a push-pull rod component, the sliding block is connected with the base in a sliding mode, the sliding block and the positioning block are enclosed to form a fixing position, the flexible base plate is arranged on one side, close to the fixing position, of the sliding block, a first inclined plane is formed on the pushing block, a second inclined plane corresponding to the first inclined plane is formed on the sliding block, the push-pull rod component is connected with the pushing block in a driving mode and used for enabling the pushing block to push or keep away from the sliding block, and when the pushing block pushes the sliding block, the pushing block can push the sliding block to be close to the fixing position through the matching of the first inclined plane and the second inclined plane.

2. The clamp of claim 1, further comprising a vacuum suction assembly, wherein the base has a suction hole, the suction hole is located at a position corresponding to the fixing position, and the vacuum suction assembly is communicated with the suction hole.

3. The clamp of claim 1 or 2, wherein the push-pull rod member comprises a rod member and a driving assembly, the base body is provided with a through hole, the rod member passes through the through hole, the driving assembly is connected with the pushing block through the rod member, the rod member is arranged along a vertical direction, the driving assembly is arranged below the base body, and the positioning block, the sliding block and the pushing block are arranged above the base body.

4. The clamp according to claim 3, wherein a plurality of guide blocks are further formed on the upper end surface of the base body, the guide blocks extend in the vertical direction, and the guide blocks are slidably connected with the push blocks so as to enable the push blocks to move in the vertical direction.

5. The clip of claim 3, further comprising a resilient member, the resilient member being coupled to the seat, the resilient member being configured to return the slider.

6. The clamp of claim 3, wherein the base body is further provided with a slag discharge hole, and the slag discharge hole is communicated with the through hole.

7. The clamp according to claim 1 or 2, wherein the base body is provided with a guide seat, the guide seat is provided with a second sliding groove, the second sliding groove extends along the sliding direction of the sliding block, the side surface of the sliding block is provided with an insertion block, and the insertion block is slidably connected with the guide seat through the second sliding groove.

8. The clamp of claim 1 or 2, wherein a connecting groove is formed on a side surface of the sliding block close to the positioning block, and the flexible backing plate is detachably arranged in the connecting groove.

9. The fixture according to claim 1 or 2, wherein the base body further comprises a positioning groove, the positioning block is partially disposed in the positioning groove, a side surface of the positioning block abuts against a groove wall of the positioning groove, and the positioning block is detachably connected to the base body.

Cnc machining apparatus, characterized in that it comprises the clamp of any one of claims 1 to 9.

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