CN211052191U

CN211052191U - Automatic centering clamp

Info

Publication number: CN211052191U
Application number: CN201921750152.8U
Authority: CN
Inventors: 刘海波; 李旭辉
Original assignee: Suzhou Lingyu Electronic Technology Co Ltd
Current assignee: Suzhou Lingyu Electronic Technology Co Ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-07-21
Anticipated expiration: 2029-10-18

Abstract

The utility model provides an automatic centering anchor clamps, including base, X to dog, Y to clamping component and Z to compressing tightly the subassembly, X sets firmly to the dog the one end of base, Z to compressing tightly the subassembly setting on the base, Y to clamping component including floating promote, elasticity portion and set up at the clamp splice of floating promotion both sides. The elastic part drives the floating push pin to descend, so that the wedge-shaped hole is enlarged, and the two clamping blocks are close to each other. When a workpiece is placed between the two clamping blocks, the two clamping blocks are opened, the wedge-shaped hole is reduced, the floating pushing pin is lifted, and meanwhile, the workpiece is always clamped and drawn close to the center through the pretightening force between the two clamping blocks, so that the workpiece is automatically centered. And then, one end of the workpiece is abutted against the X-direction stop block, and the workpiece is pressed by the Z-direction pressing assembly to finish the fixation of the workpiece.

Description

Automatic centering clamp

Technical Field

The utility model relates to a machine tooling field, concretely relates to automatic centering anchor clamps.

Background

In the machining process of a blank (hereinafter, referred to as a workpiece), the blank needs to be fixed and centered. However, the existing positioning clamp can fix the workpiece, but cannot accurately align the center line of the product.

As shown in FIG. 1, the workpiece 100 is locked and fixed from above by the pressing plate 300 by inserting the positioning teeth 101 at both sides into the jig 200 below. The utility model provides a work piece 100 is crowded section bar, and the size of crowded type mould is fixed, and the work piece size that theoretically it produced is also fixed. However, the sizes of the positioning teeth 101 on both sides of the extruded workpiece 100 are different, and the variation is mainly caused by self-heating deformation (i.e., expansion and contraction). The deformation is characterized by simultaneous changes in relative dimensions (i.e., both larger and smaller), a fixed center of the workpiece 100, and changes in dimensional widths on both sides. Therefore, the variation of the Y-direction positioning dimension of the workpiece is large, positioning is affected, the position of a processed product is inaccurate, and the dimension yield is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an automatic centering anchor clamps that can automatic alignment work piece center and location.

The utility model provides a technical scheme that its technical problem adopted provides an automatic centering anchor clamps, including base, X to dog, Y to clamping component and Z to compressing tightly the subassembly, X sets firmly to the dog the one end of base, Z sets up on the base to compressing tightly the subassembly, Y includes to clamping component: the floating push pin is arranged in the base in a lifting manner, and the bottom of the floating push pin is conical or wedge-shaped; one end of the elastic part is connected with the base, and the other end of the elastic part is connected with the top of the floating push pin; the clamping blocks are arranged on two sides of the floating push pin, one end of each clamping block extends out of the base, and the other end of each clamping block is inserted into the base and provided with a wedge-shaped notch; the two clamping blocks are mutually clasped through the wedge-shaped gaps to form wedge-shaped holes; the floating push pin is inserted in the wedge-shaped hole; when the floating push pin descends, the two clamping blocks are close to each other; when the two clamping blocks are far away from each other, the floating push pin is lifted.

The utility model provides a pair of automatic centering anchor clamps orders about through elasticity portion and floats to promote the decline for the wedge grow, make two clamp splices be close to each other. When a workpiece is placed between the two clamping blocks, the two clamping blocks are opened, the wedge-shaped hole is reduced, the floating pushing pin is lifted, and meanwhile, the workpiece is always clamped and drawn close to the center through the pretightening force between the two clamping blocks, so that the workpiece is automatically centered. And then, one end of the workpiece is abutted against the X-direction stop block, and the workpiece is pressed by the Z-direction pressing assembly to finish the fixation of the workpiece.

In some embodiments, each of the clamping blocks comprises a clamping arm and a connecting arm perpendicularly connected to the clamping arm; the wedge-shaped notch is formed in the connecting arm; and the two connecting arms are mutually clasped through the wedge-shaped gaps to form the wedge-shaped hole.

In some embodiments, the Y-clamp assembly further comprises a circlip; the clamp spring is clamped on the clamping arm, is perpendicular to the clamping arm and is abutted against the upper surface of the base.

In some embodiments, the end of the clamping arm remote from the connecting arm is further provided with a ramp for guiding.

In some embodiments, the resilient portion is a compression spring; and two ends of the compression spring are respectively connected with the base and the floating push pin.

In some embodiments, the Y-clamp assembly further comprises a headless screw; the headless screw is in threaded connection with the base; one end of the compression spring abuts against the headless screw, and the other end of the compression spring abuts against the floating push pin.

In some embodiments, the Z-compression assembly comprises a compression bar and a locking screw; the pressing strip is pressed on the workpiece and fixed on the base through the screw.

In some embodiments, bosses are provided at both ends of the base, and each boss is provided with a mounting hole.

In some embodiments, handles are further provided on both sides of the base.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

FIG. 1 is a schematic diagram illustrating a state of use of a positioning fixture in the related art;

Fig. 2 is a schematic perspective view of an automatic centering fixture for a mounted workpiece according to an embodiment of the present invention;

FIG. 3 is a schematic perspective view of an automatic centering fixture without a workpiece according to an embodiment of the present invention;

Fig. 4 is a schematic perspective view of a base according to an embodiment of the present invention;

Fig. 5 is a schematic bottom view of an embodiment of the present invention;

Fig. 6 is a schematic perspective view of an X-directional block according to an embodiment of the present invention;

3 FIG. 3 7 3 is 3 a 3 schematic 3 cross 3- 3 sectional 3 view 3 taken 3 at 3 the 3 location 3 A 3- 3 A 3 in 3 FIG. 3 2 3; 3

Fig. 8 is an exploded view of the automatic centering fixture according to the embodiment of the present invention;

Fig. 9 is a schematic perspective view of a clamp block according to an embodiment of the present invention;

Fig. 10 is a schematic view of an operating state of the clamping block according to the embodiment of the present invention;

Fig. 11 is a partially enlarged schematic view of a portion at position B in fig. 8.

The reference numerals are explained below:

100-a workpiece; 101-positioning teeth; 200-a jig; 300-pressing plate; 1-a base; 11-a cover plate; 12-a boss; 14-handle 13-mounting hole; a 2-X direction block; 31-a floating promotion; 32-an elastic portion; 33-a clamping block; 34-a gripper arm; 35-a linker arm; 36-a wedge-shaped notch; 37-a wedge-shaped hole; 38-a clamp spring; 39-headless screws; a 4-Z direction pressing component; 41-pressing strips; 42-locking screw.

Detailed Description

Exemplary embodiments that embody features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.

Referring to fig. 2, 3, 7 and 8, the present embodiment provides an automatic centering fixture, which includes a base 1, an X-direction stopper 2, a Y-direction clamping assembly and a Z-direction pressing assembly 4.

Wherein, the X-direction block 2 is fixedly arranged at one end of the base 1. The Z-direction pressing member 4 is provided on the base 1 to press the workpiece 100. The Y-direction clamping assembly comprises a floating push pin 31, an elastic part 32 and clamping blocks 33 arranged at two sides of the floating push pin 31. The floating push pin 31 is arranged in the base 1 in a lifting way, and the bottom of the floating push pin is conical or wedge-shaped. One end of the elastic part 32 is connected with the base 1, and the other end is connected with the top of the floating push pin 31. The clamp blocks 33 are slidably disposed on the base 1. One end of the clamping block 33 extends out of the base 1, and the other end is inserted in the base 1 and provided with a wedge-shaped gap 36. The two clamping blocks 33 form a wedge-shaped hole 37 through mutual embracing of the wedge-shaped notches 36. The floating push pin 31 is inserted into the wedge hole 37. When the floating push pin 31 descends, the two clamping blocks 33 are close to each other and the distance between the two clamping blocks 33 is smaller than the width of the workpiece 100; when the two clamping blocks 33 move away from each other, the floating push pin 31 rises.

The floating push pin 31 is driven to descend by the elastic part 32, so that the wedge hole 37 is enlarged, and the two clamping blocks 33 are close to each other. When the workpiece 100 is placed between the two clamping blocks 33, the two clamping blocks 33 are spread, the wedge-shaped hole 37 is reduced, the floating push pin 31 is lifted, and meanwhile, the workpiece 100 is always clamped and drawn close to the center by the pretightening force between the two clamping blocks 33, so that the automatic centering of the workpiece 100 is realized. Then, one end of the workpiece 100 is abutted against the X-direction stop block 2, and the workpiece 100 is pressed by the Z-direction pressing component 4, so that the workpiece 100 is fixed.

Specifically, the automatic centering fixture in this embodiment is a double-station fixture.

Referring to fig. 4 and 5, the base 1 serves as a carrying body, and has a plurality of accommodating grooves formed therein for accommodating the Y-direction clamping assembly and is closed by a cover plate 11. Bosses 12 are arranged at two ends of the base 1, mounting holes 13 are formed in the bosses 12, and the whole fixture can be mounted on a workbench of a machine tool through the mounting holes 13. Handles 14 are arranged on two sides of the base 1, so that the whole set of clamp can be carried conveniently.

Referring to fig. 6, the X-directional stopper 2 in this embodiment has a 7-shape. The X-direction stopper 2 is inserted into the base 1 and fixed by screws (not shown).

Referring to fig. 9 and 10 together, specifically, each clamp block 33 includes a clamp arm 34 and a connecting arm 35 perpendicularly connected to the clamp arm 34. The wedge-shaped recess 36 opens onto the connecting arm 35. When the wedge-shaped hole 37 becomes larger, the two connecting arms 35 are close to each other, and the two holding arms 34 are also close to each other; when the wedge-shaped hole 37 becomes smaller, the two connecting arms 35 are away from each other, and the two holding arms 34 are also away from each other. Therefore, by changing the size of the wedge-shaped hole 37, the two clamping arms 34 can be controlled to be separated and closed, and the structure is ingenious and convenient.

Referring to fig. 11, the Y-clamp assembly further includes a circlip 38. The clamp spring 38 is clamped on the clamping arm 34, is perpendicular to the clamping arm 34, and is pressed against the upper surface of the base 1. By providing the clamp spring 38 on the clamp arm 34, and the clamp spring 38 is close to the surface of the base 1, the clamp arm 34 is ensured not to tilt when the clamp arm 34 moves back and forth.

With continued reference to fig. 11, the end (i.e., the top end) of the clamp arm 34 remote from the connecting arm 35 is also provided with a ramp for guiding to facilitate placement of the workpiece 100 between the clamp arms 34.

In this embodiment, the elastic portion 32 is a compression spring, and two ends of the compression spring are respectively connected to the base 1 and the floating push pin 31. In other embodiments, the elastic portion 32 may also be formed by two magnets, which provide downward pressure to the floating push pin 31 by utilizing the principle that like poles repel each other. Further, the Y-clamp assembly also includes a headless screw 39. The headless screw 39 is screwed to the base 1. The compression spring is compressed between the headless screw 39 and the floating push pin 31. Through being equipped with headless screw 39 on the surface of base 1, not only be convenient for change compression spring from the top of anchor clamps, need not to overturn base 1, through twisting headless screw 39 moreover, can adjust the height of headless screw 39 in base 1, and then change compression spring's length, realize changing the pretightning force (the clamp dynamics promptly) between two clamp splice 33.

With continued reference to fig. 2 and 3, the Z-clamp assembly 4 includes a hold-down bar 41 and a locking screw 42. The pressing strip 41 is pressed against the workpiece 100 and is fixed on the base 1 through the screw, so that the operation is very simple, convenient and quick. In this embodiment, a plurality of Z-direction pressing assemblies 4 are disposed on the base 1. In other embodiments, the Z-direction pressing component 4 may also adopt a cylinder structure, and the workpiece 100 is pressed from above by extending a piston rod of the cylinder.

In summary of the above description of the structure of the automatic centering fixture, the following describes the usage of the fixture in detail:

The workpiece 100 is pressed between the two clamping arms 34, the two clamping arms 34 are expanded, the wedge-shaped hole 37 is reduced, the floating push pin 31 is lifted, the two clamping arms 34 clamp and center the workpiece 100 from two sides under the action of a pre-tightening force, and a gap between the positioning teeth 101 and a clamp due to variation is eliminated, so that the positioning influence caused by width size change is eliminated. One end of the workpiece 100 is then pressed against the X-stop 2. Finally, the workpiece 100 is pressed down until the positioning teeth 101 of the workpiece are tightly attached to the surface of the base 1, and the workpiece 100 is fixed through the pressing strips 41 and the locking screws 42.

After the machining is completed, the locking screw 42 and the bead 41 are unfastened, and the workpiece 100 is taken out from between the two holding arms 34. At the same time, the compression spring drives the floating push pin 31 to descend, the wedge hole 37 is expanded, and the two clamping arms 34 are close to each other and reset.

While the present invention has been described with reference to the exemplary embodiments described above, it is understood that the terms used are words of description and illustration, rather than words of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. The utility model provides an automatic centering anchor clamps, includes that base, X are to dog, Y to clamping component and Z to compressing tightly the subassembly, X sets firmly to the dog the one end of base, Z is to compressing tightly the subassembly setting on the base, its characterized in that, Y includes to clamping component:

The floating push pin is arranged in the base in a lifting manner, and the bottom of the floating push pin is conical or wedge-shaped;

One end of the elastic part is connected with the base, and the other end of the elastic part is connected with the top of the floating push pin; and

The clamping blocks are arranged on two sides of the floating pushing pin, one end of each clamping block extends out of the base, and the other end of each clamping block is inserted into the base and provided with a wedge-shaped notch; the two clamping blocks are mutually clasped through the wedge-shaped gaps to form wedge-shaped holes; the floating push pin is inserted in the wedge-shaped hole;

When the floating push pin descends, the two clamping blocks are close to each other; when the two clamping blocks are far away from each other, the floating push pin is lifted.

2. The automatic centering fixture of claim 1, wherein each of the clamping blocks comprises a clamping arm and a connecting arm perpendicularly connected to the clamping arm; the wedge-shaped notch is formed in the connecting arm; and the two connecting arms are mutually clasped through the wedge-shaped gaps to form the wedge-shaped hole.

3. The automatic centering fixture of claim 2, wherein the Y-direction clamping assembly further comprises a snap spring; the clamp spring is clamped on the clamping arm, is perpendicular to the clamping arm and is abutted against the upper surface of the base.

4. The automatic centering fixture as claimed in claim 3, wherein an end of said holding arm away from said connecting arm is further provided with a slope for guiding.

5. The automatic centering jig of claim 1, wherein the elastic part is a compression spring; and two ends of the compression spring are respectively connected with the base and the floating push pin.

6. The auto-centering fixture of claim 5, wherein the Y-clamp assembly further comprises a headless screw; the headless screw is in threaded connection with the base; one end of the compression spring abuts against the headless screw, and the other end of the compression spring abuts against the floating push pin.

7. The automatic centering fixture of claim 1, wherein said Z-direction compression assembly comprises a compression bar and a locking screw; the pressing strip is pressed on the workpiece and fixed on the base through the screw.

8. The automatic centering fixture of any one of claims 1 to 7, wherein bosses are provided at both ends of the base, and each boss is provided with a mounting hole.

9. The automatic centering fixture of claim 8, wherein handles are further provided on both sides of the base.