CN221455116U - Thin-wall part processing positioning fixture - Google Patents

Abstract

The utility model belongs to the technical field of thin-wall workpiece machining, and particularly relates to a thin-wall workpiece machining positioning clamp. The thin-wall part machining positioning fixture is characterized in that two positioning devices are respectively arranged at two opposite angles of a bottom plate and used for positioning corresponding positioning reference holes on the thin-wall part; supporting the thin-wall part of the thin-wall part through a plurality of supporting cylinders, and pressing down the thin-wall part through a plurality of first pressing devices which are arranged in one-to-one correspondence with the supporting cylinders; the condition that the processing size is unstable due to deformation of the product can be avoided, and the stability of the processing size is improved; the supporting device can adjust the supporting position according to the deformation of the product, so that the supporting device is in complete contact with the product, and the risk of size rebound after the product is processed is solved.

Description

Thin-wall part processing positioning fixture

Technical Field

The utility model belongs to the technical field of thin-wall workpiece machining, and particularly relates to a thin-wall workpiece machining positioning clamp.

Background

At present, in the die casting forming process of aluminum alloy, the die casting is deformed in the cooling process due to thermal expansion, and in the current die casting process, the deformation defect cannot be eradicated, and particularly in the case of a thin-wall part, the deformation amount can be further increased along with the reduction of the thin-wall thickness of a product. After the die casting is formed through die casting, the high-precision dimension requirement cannot be guaranteed through a die casting process, and the dimension precision of the product is required to be met through subsequent CNC processing. In the prior art, in order to eliminate the influence of die casting deformation on processing in the processing process, usually when designing CNC processing positioning fixture, compress tightly the processing with the product completely through hard strutting arrangement and closing device, can solve the product like this and lead to vibrating the sword bad because of the atress is uneven in the processing process, but when the product processing is accomplished the back, no longer compress tightly the product, because the product warp the rebound, lead to product processing size off tracking, can't satisfy the dimensional accuracy requirement of product.

Disclosure of utility model

The utility model aims to provide a thin-wall part machining positioning clamp which aims to solve the technical problem that the machining dimensional accuracy of a product is affected by product deformation in the machining process.

The application provides a thin-wall part machining positioning fixture. The thin-walled part processing positioning fixture comprises: a bottom plate; the two positioning devices are respectively arranged at two opposite angles of the bottom plate and are used for positioning corresponding positioning reference holes on the thin-wall piece; the supporting cylinders are arranged on the bottom plate and used for supporting the to-be-processed part of the thin-wall piece; and the first pressing devices are arranged in one-to-one correspondence with the supporting cylinders and are used for pressing down the thin-wall parts.

In one embodiment of the present application, the positioning device includes: the fixed seat is arranged on the bottom plate; the positioning pin head is used for extending into the corresponding positioning reference hole; the elastic device is arranged in the fixed seat and is used for elastically supporting the positioning pin head; and the first cylinder is used for driving the elastic device to lift.

In one embodiment of the application, the elastic means comprises: the cylinder body is arranged in the fixed seat, and the lower end of the cylinder body is provided with a plug connected with a driving rod of the first cylinder; the spring is arranged in the cylinder, the lower end of the spring is propped against the blocking head, and the upper end of the spring is propped against the bottom of the positioning pin head; and the spring pin is fixed on the positioning pin head, is matched with the side wall of the cylinder in an up-and-down movable way and is used for limiting the highest position of the spring pin.

In an embodiment of the present application, in the two positioning devices, a positioning pin head of one positioning device is tapered, and a positioning pin head of the other positioning device is flat.

In an embodiment of the application, the thin-walled workpiece processing positioning fixture further includes: a plurality of support blocks mounted on the base plate; and the second pressing devices are arranged in one-to-one correspondence with the supporting blocks and are used for pressing the thin-wall parts on the supporting blocks.

In one embodiment of the present application, the second compressing device includes: the fixed block is fixed on the bottom plate; the second cylinder is fixed on the bottom plate; one end of the compression bar is used for pressing down the thin wall piece, the other end of the compression bar is hinged with a driving rod of the second cylinder, the middle part of the compression bar is hinged with the upper end of a connecting rod, and the lower end of the connecting rod is hinged with the fixed block.

In an embodiment of the application, the thin-walled workpiece processing positioning fixture further comprises a four-axis turntable and a four-axis positioning seat; two opposite sides of the bottom plate are respectively fixed on the four-axis turntable and the four-axis positioning seat through corresponding L-shaped plates.

In one embodiment of the present application, the first compressing device includes a third cylinder and a compression rod.

The beneficial effects of the utility model are as follows: the thin-wall part machining positioning fixture is characterized in that two positioning devices are respectively arranged at two opposite angles of a bottom plate and used for positioning corresponding positioning reference holes on the thin-wall part; supporting the thin-wall part of the thin-wall part through a plurality of supporting cylinders, and pressing down the thin-wall part through a plurality of first pressing devices which are arranged in one-to-one correspondence with the supporting cylinders; the condition that the processing size is unstable due to deformation of the product can be avoided, and the stability of the processing size is improved; the supporting device can adjust the supporting position according to the deformation of the product, so that the supporting device is in complete contact with the product, and the risk of size rebound after the product is processed is solved.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and drawings.

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a thin-walled workpiece machining positioning jig according to a preferred embodiment of the present utility model;

FIG. 2 is a perspective view of a thin-walled workpiece machining positioning jig according to a preferred embodiment of the present utility model;

FIG. 3 is a schematic view of a cone-shaped positioning device according to a preferred embodiment of the present utility model;

FIG. 4 is a schematic view of a flat positioning device according to a preferred embodiment of the present utility model;

FIG. 5 is a cross-sectional view of a positioning device of a preferred embodiment of the present utility model;

FIG. 6 is a schematic illustration of the cooperation of the first hold-down device and the support cylinder of a preferred embodiment of the present utility model;

fig. 7 is a schematic view showing the cooperation of the second pressing means and the supporting block according to a preferred embodiment of the present utility model.

In the figure:

The thin-walled workpiece 100, the bottom plate 1, the conical positioning device 2, the fixed seat 21, the positioning pin head 22, the elastic device 23, the cylinder 231, the plug 232, the spring 233, the spring pin 234, the first cylinder 24, the flat positioning device 3, the supporting cylinder 4, the first pressing device 5, the third cylinder 51, the pressing rod 52, the supporting block 6, the second pressing device 7, the fixed block 71, the second cylinder 72, the pressing rod 73, the connecting rod 74, the four-axis turntable 8, the four-axis positioning seat 9 and the L-shaped plate 10.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The application provides a thin-walled workpiece processing positioning fixture, which is respectively described in detail below. It should be noted that the following description order of the embodiments is not intended to limit the preferred order of the embodiments of the present application. In the following embodiments, the descriptions of the embodiments are focused on, and for the part that is not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

Referring to fig. 1 and 2, in an embodiment, a thin-walled member machining positioning jig includes: a base plate 1; the two positioning devices 2 and 3 are respectively arranged at two opposite angles of the bottom plate 1 and are used for positioning corresponding positioning reference holes on the thin-wall piece 100; a plurality of support cylinders 4 provided on the base plate 1 for supporting portions to be processed of the thin-walled member 100; and a plurality of first pressing means 5, which are provided in one-to-one correspondence with the supporting cylinders 4, for pressing down the thin-wall member 100.

In the present embodiment, the supporting cylinder 4 is supported on the portion to be processed of the thin-walled workpiece 100, such as a CNC processing area, so that the stress of the thin-walled workpiece 100 is balanced during the processing;

In this embodiment, preferably, the positioning device 2, 3 includes: a fixed seat 21 mounted on the base plate 1; the positioning pin heads 22 are used for extending into the corresponding positioning reference holes; an elastic device 23 disposed in the fixed seat 21 for elastically supporting the positioning pin head 22; and a first cylinder 24 for driving the elastic device 23 to lift.

Referring to fig. 3 and 4, in the present embodiment, it is preferable that the positioning pin head of the positioning device is tapered, that is, the tapered positioning device 2; the positioning pin head of the other positioning device is flat, namely a flat positioning device 3.

In some conventional machining scenarios, the common dowel heads are both rounded or one rounded and one tapered. However, for die castings with thinner wall thicknesses, deformation is easy to occur in the die casting process, so that the die castings cannot be placed in the positioning pins due to the positioning Kong Pianwei on the product. In the embodiment, the positioning pin heads of the two positioning devices are respectively designed into a conical shape and a flat shape, so that the influence that the positioning pin cannot be placed due to the deviation of the positioning holes caused by deformation of products can be eliminated.

Referring to fig. 5, the elastic means 23 includes: a cylinder 231 disposed in the fixed seat 21, and having a plug 232 connected to the driving rod of the first cylinder 24 at its lower end; the spring 233 is arranged in the cylinder 231, the lower end of the spring 233 is propped against the plug 232, and the upper end of the spring 233 is propped against the bottom of the positioning pin head 22; and a spring pin 234 fixed on the positioning pin head 22 and movably matched with the side wall of the cylinder 231 up and down for limiting the highest position of the spring pin 234.

In this embodiment, the first cylinder 24 can drive the elastic device 23 to extend out of the fixing seat 21; the side wall of the cylinder 231 and the side wall of the fixing seat 21 can be provided with strip-shaped holes vertically arranged, the spring pin 234 can move up and down along the strip-shaped holes, and the strip-shaped holes can limit the stroke of the spring 233.

In an application scene, two holes on opposite angles are selected as positioning reference holes on a thin-walled workpiece 100 to be processed, and positioning devices 2 and 3 are used for positioning products; when a product to be processed is clamped, the front small end parts of the conical locating pin and the flat locating pin are contacted with the product locating hole, when the product locating hole and the locating pin are not completely concentric due to deformation, the conical locating pin and the flat locating pin move downwards under the pressure of the product, and the pin head is always contacted with the reference hole, so that the positioning of the reference hole can be always kept; the positioning requirement of the product can be ensured, and the influence of the deformation of the product on the positioning can be eliminated.

As shown in fig. 6, the first pressing device 5 includes a third cylinder 51 and a pressing rod 52.

In an application scene, a first pressing device 5 is arranged on a supporting cylinder, a plurality of supporting cylinders 4 are arranged on a bottom plate 1, and the supporting cylinders 4 are connected with air pipes; after the anchor clamps are put into to the product, through positioner 2, 3 location back, first closing device 5 begins work and compresses tightly the product under compressed air's effect, prevent that the product from shifting in the course of working, guarantee the stability of processing size, after the product is compressed tightly by closing device, support jar 4 upwards moves under compressed air's effect, support jar 4 and product contact back, can stop moving, and fix in this position, when the product warp, support jar 4 can be according to the deformation situation of product, automatic alignment supporting point and support the product, the unable problem of adjusting along with the product deflection of fixed strutting arrangement has been avoided, guarantee product and strutting arrangement and laminate completely simultaneously, play the effect of full support.

Referring to fig. 2, the thin-walled workpiece processing positioning fixture further includes: a plurality of support blocks 6 mounted on the base plate 1; the second pressing devices 7 are arranged in one-to-one correspondence with the supporting blocks 6 and are used for pressing the thin-wall parts 100 on the supporting blocks 6; the workpiece may be further secured.

Referring to fig. 7, the second pressing device 7 includes: a fixing block 71 fixed to the base plate 1; a second cylinder 72 fixed to the base plate 1; the pressing rod 73 has one end for pressing down the thin-walled member 100, the other end hinged to the driving rod of the second cylinder 72, the middle part hinged to the upper end of a link 74, and the lower end of the link 74 hinged to the fixed block 71.

Further, the thin-walled workpiece processing and positioning clamp also comprises a four-axis turntable 8 and a four-axis positioning seat 9; two opposite sides of the bottom plate 1 are respectively fixed on the four-axis turntable 8 and the four-axis positioning seat 9 through corresponding L-shaped plates 10.

In summary, the thin-walled workpiece processing positioning fixture is provided with two positioning devices at two opposite angles of the bottom plate respectively, and the positioning devices are used for positioning corresponding positioning reference holes on the thin-walled workpiece; supporting the thin-wall part of the thin-wall part through a plurality of supporting cylinders, and pressing down the thin-wall part through a plurality of first pressing devices which are arranged in one-to-one correspondence with the supporting cylinders; the condition that the processing size is unstable due to deformation of the product can be avoided, and the stability of the processing size is improved; the supporting device can adjust the supporting position according to the deformation of the product, so that the supporting device is in complete contact with the product, and the risk of size rebound after the product is processed is solved.

It should be noted that the supporting cylinder is one of the components of the tool clamp, and is an executing element with higher technical content. The supporting cylinder generally uses a clamp product with higher automation degree, is mainly used for supporting a workpiece to prevent the workpiece from being deformed by cutting force during processing, and avoids vibration during processing, so that the processing precision of the workpiece is affected, the supporting cylinder has a low-pressure self-locking function, and corrosion-resistant materials can prevent cooling liquid and working environment from corroding the cylinder body. The support cylinder is mainly used for preventing deformation and support of a workpiece to be machined during machining, and is therefore referred to as a "support cylinder" in the industry.

It should be noted that, each device (the component not illustrating the specific structure) selected in the present application is a general standard component or a component known to those skilled in the art, and the structure and principle thereof are known by those skilled in the art through technical manual or through routine experimental methods.

In describing embodiments of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly coupled, detachably coupled, or integrally coupled.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (8)

1. The utility model provides a thin wall spare adds clamping apparatus which characterized in that includes:

A bottom plate;

The two positioning devices are respectively arranged at two opposite angles of the bottom plate and are used for positioning corresponding positioning reference holes on the thin-wall piece;

the supporting cylinders are arranged on the bottom plate and used for supporting the to-be-processed part of the thin-wall piece; and

And the plurality of first pressing devices are arranged in one-to-one correspondence with the supporting cylinders and are used for pressing down the thin-wall parts.

2. The thin-walled workpiece machining positioning jig according to claim 1, wherein,

The positioning device comprises:

the fixed seat is arranged on the bottom plate;

the positioning pin head is used for extending into the corresponding positioning reference hole;

the elastic device is arranged in the fixed seat and is used for elastically supporting the positioning pin head; and

And the first cylinder is used for driving the elastic device to lift.

3. The thin-walled workpiece machining positioning jig according to claim 2, wherein,

The elastic means includes:

The cylinder body is arranged in the fixed seat, and the lower end of the cylinder body is provided with a plug connected with a driving rod of the first cylinder;

The spring is arranged in the cylinder, the lower end of the spring is propped against the blocking head, and the upper end of the spring is propped against the bottom of the positioning pin head; and

And the spring pin is fixed on the positioning pin head, is matched with the side wall of the cylinder in an up-and-down movable way and is used for limiting the highest position of the spring pin.

4. The thin-walled workpiece machining positioning jig according to claim 2, wherein,

In the two positioning devices, the positioning pin head of one positioning device is conical, and the positioning pin head of the other positioning device is flat.

5. The thin-walled workpiece machining positioning jig according to claim 1, wherein,

The thin-walled part processing positioning fixture further comprises:

A plurality of support blocks mounted on the base plate; and

And the second pressing devices are arranged in one-to-one correspondence with the supporting blocks and are used for pressing the thin-wall parts on the supporting blocks.

6. The thin-walled workpiece machining positioning jig according to claim 5, wherein,

The second compressing device includes:

The fixed block is fixed on the bottom plate;

The second cylinder is fixed on the bottom plate;

one end of the compression bar is used for pressing down the thin wall piece, the other end of the compression bar is hinged with a driving rod of the second cylinder, the middle part of the compression bar is hinged with the upper end of a connecting rod, and the lower end of the connecting rod is hinged with the fixed block.

7. The thin-walled workpiece machining positioning jig according to claim 1, wherein,

The thin-wall part machining positioning fixture further comprises a four-axis turntable and a four-axis positioning seat;

Two opposite sides of the bottom plate are respectively fixed on the four-axis turntable and the four-axis positioning seat through corresponding L-shaped plates.

8. The thin-walled workpiece machining positioning jig according to claim 1, wherein,

The first pressing device comprises a third cylinder and a pressing rod.