CN220296506U

CN220296506U - Processing tool for thin-wall frame-shaped workpiece

Info

Publication number: CN220296506U
Application number: CN202321789650.XU
Authority: CN
Inventors: 杨历宾
Original assignee: Ningbo Beilun Shuangdong Machinery Co ltd
Current assignee: Ningbo Beilun Shuangdong Machinery Co ltd
Priority date: 2023-07-10
Filing date: 2023-07-10
Publication date: 2024-01-05
Anticipated expiration: 2033-07-10

Abstract

The utility model relates to a processing tool for a thin-wall frame-shaped workpiece, which is used for processing the thin-wall frame-shaped workpiece. The processing tool comprises: a bottom plate; at least one negative pressure zone comprising at least one negative pressure cavity recessed from the surface; at least two crimping assemblies are arranged on the bottom plate at intervals, and the crimping assemblies are provided with movable dynamic pressure joints positioned above the negative pressure area. And the negative pressure assembly is connected to the negative pressure area and communicated with the negative pressure cavity, and the area of the negative pressure area is smaller than that of the base part. The processing tool for the thin-wall frame-shaped workpiece provided by the utility model utilizes the principle of negative pressure adsorption and is fixed by the crimping assembly, so that the problem that the frame part of the thin-wall frame-shaped workpiece is easy to deform and cannot bear large pressure to clamp and fix is solved.

Description

Processing tool for thin-wall frame-shaped workpiece

Technical Field

The utility model relates to the technical field of clamps, in particular to a frame type workpiece machining tool.

Background

Thin-walled frame-shaped workpieces are very common in the automotive industry and are often used for mounting electrical assembly equipment. The surface of the thin-wall frame-shaped workpiece is provided with a plurality of assembly components at different positions, and the processing precision is required to be high. However, because the side wall of the thin-wall frame-shaped workpiece is thinner, the side wall is easy to deform when bearing larger stress in the vertical direction, and the clamping cannot be performed in a vertical compression joint mode.

Aiming at the problem that the side wall of the thin-wall frame-shaped workpiece is thinner, a common solution is to fix the workpiece by adopting an auxiliary supporting mechanism, for example, chinese patent No. 113618434 discloses a clamping tool device and a clamping method for processing a thin-wall part by using a main supporting mechanism assisted by the auxiliary supporting mechanism.

However, since the main support mechanism and the auxiliary support mechanism form a large number of contact areas when fixing the thin-wall frame-shaped workpiece, a large number of processing surfaces on the surface of the workpiece are occupied, and in order to realize multi-directional processing of the thin-wall frame-shaped workpiece, the clamping positions need to be continuously changed, the process is cumbersome and inconvenient, the workpiece is frequently disassembled and assembled, the technical problems of low positioning precision and error generation of the processing positions are easily caused, and therefore, improvement is needed.

Disclosure of Invention

In order to overcome the problems in the related art, the embodiment of the application provides a processing tool for a thin-wall frame-shaped workpiece, which is used for solving the technical problems that the thin-wall frame-shaped workpiece cannot bear larger stress in the vertical direction and is low in positioning precision.

According to a first aspect of an embodiment of the present utility model, there is provided a processing tool for positioning and processing a thin-walled frame-shaped workpiece, the thin-walled frame-shaped workpiece including a planar base portion and a frame portion surrounding the base portion, the processing tool comprising:

a base plate provided with at least one negative pressure region including at least one negative pressure chamber recessed from a surface;

the compression joint assemblies are arranged on at least two compression joint assemblies of the bottom plate at intervals, the compression joint assemblies are provided with movable compression joints, the compression joint assemblies are positioned above the negative pressure area, and the compression joint assemblies are used for being movably compressed and connected to the frame part;

the negative pressure component is connected to the negative pressure area and communicated with the negative pressure cavity, and the area of the negative pressure area is smaller than that of the base part.

In an embodiment, the negative pressure cavity is formed by recessing from the surface of the bottom plate, and a plurality of supporting bosses are distributed in the negative pressure cavity at intervals.

In an embodiment, the bottom plate further includes a buffer groove recessed around the negative pressure region, and an area surrounded by the buffer groove is smaller than an area of the base portion.

In an embodiment, the recess depth of the buffer groove is greater than the recess depth of the negative pressure region.

In one embodiment, the negative pressure assembly is connected to the center of the negative pressure chamber.

In an embodiment, the bottom plate is further provided with at least one positioning pin arranged at intervals with the negative pressure area, the thin-wall frame-shaped workpiece comprises a connecting boss protruding out of the annular wall, the connecting boss is provided with a positioning hole, and the positioning pin is spliced and positioned with the positioning hole.

In an embodiment, two positioning pins are provided, and the two positioning pins are diagonally distributed on two sides of the negative pressure area.

In an embodiment, at least one crimping component is distributed on two opposite sides of each negative pressure area, and two crimping components are crimped on the diagonal corners of the frame part.

In an embodiment, the negative pressure assembly comprises a control valve connected with an air source and a negative pressure pipe connected with the control valve and the negative pressure cavity, and the control valve controls the opening and closing of the negative pressure cavity.

In an embodiment, the negative pressure region comprises a first region and a second region which are distributed at intervals, and the length direction of the first region is intersected with the length direction of the second region.

The technical scheme provided by the embodiment of the utility model can comprise the following beneficial effects: the processing tool utilizes the principle of negative pressure absorption of the negative pressure cavity to enable the bottom of the thin-wall frame-shaped workpiece to be subjected to air pressure, so that the thin-wall frame-shaped workpiece is absorbed on the tool, and deformation caused by the fact that the side wall of the thin-wall frame-shaped workpiece is subjected to upper pressure is avoided. The compression joint assembly is used for exerting pressure to position, so that the thin-wall frame-shaped workpiece is tightly attached to the negative pressure area in the vertical direction, negative pressure failure is prevented, and the stability of negative pressure adsorption is improved. In addition, the crimping assembly can reduce vibration generated in the machining process of the side wall, and is beneficial to improving machining precision. The crimping assembly is arranged in a small amount, so that excessive machining surfaces are prevented from being occupied, the workpiece replacement times are reduced, and the machining efficiency is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

Fig. 1 is a schematic structural view of a thin-walled frame-shaped workpiece processing tool according to an exemplary embodiment.

Fig. 2 is a bottom view of a thin-walled frame workpiece processing tool shown according to an exemplary embodiment.

FIG. 3 is a detailed schematic diagram of a negative pressure region of a thin-walled frame workpiece processing tool, according to an exemplary embodiment.

Fig. 4 is a schematic diagram of a structure of a thin-walled frame-shaped workpiece, according to an exemplary embodiment.

Fig. 5 is a top view of a thin-walled frame shaped workpiece processing tool shown according to another exemplary embodiment.

Fig. 6 is a bottom view of a thin-walled frame workpiece processing tool shown according to another exemplary embodiment.

Fig. 7 is a schematic structural view of a thin-walled frame workpiece processing tool after clamping a workpiece according to another exemplary embodiment.

In the figure, a base plate 10; a negative pressure region 20; a negative pressure chamber 21; a support boss 22; a buffer groove 23; a crimping assembly 30; crimping the telescoping member 31; a hinge base 32; a crimping block 33; a negative pressure assembly 40; a negative pressure generator 41; a switching valve 42; a compressed air line 43; a three-way valve 44; a positioning pin 50; a work piece 60; a base portion 61; a frame portion 62; a connection boss 63; a positioning hole 64; a circular through hole 641; long hole 642.

Detailed Description

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, rather than indicating or implying that the apparatus or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and should not be construed as limiting the present patent, and that the specific meaning of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.

In the description of the present utility model, unless explicitly stated and limited otherwise, the term "coupled" or the like should be interpreted broadly, as it may be fixedly coupled, detachably coupled, or integrally formed, as indicating the relationship of components; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two parts or interaction relationship between the two parts. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model provides a thin-wall frame-shaped workpiece processing tool which is used for processing a thin-wall frame-shaped workpiece 60, wherein the processed thin-wall frame-shaped workpiece 60 is made of plastic or metal, the thin-wall frame-shaped workpiece 60 comprises a planar base part 61 and a frame part 62 surrounding the base part 61, and the side wall of the frame part 62 is of a thin-wall structure. Optionally, the thin-walled frame workpiece 60 includes a bottom connecting boss 63 protruding from the annular wall, and the connecting boss 63 is provided with a positioning hole 64.

In the embodiments referred to in this specification, the workpieces 60 are all thin-walled frame-shaped workpieces 60, and the tools are all thin-walled frame-shaped workpiece processing tools.

As shown in fig. 1 to 4, the present utility model provides a thin-walled frame-shaped workpiece processing tool for positioning and processing a thin-walled frame-shaped workpiece 60.

The processing tool comprises a bottom plate 10, a negative pressure area 20, two crimping assemblies 30 arranged on the bottom plate 10 at intervals, and a set of negative pressure assembly 40, wherein the negative pressure area 20 comprises a negative pressure cavity 21 recessed from the surface, the crimping assemblies 30 are provided with movable crimping heads, and the crimping heads are positioned above the negative pressure area 20. The negative pressure assembly 40 is connected to the negative pressure region 20 and communicates with the negative pressure chamber 21, and the area of the negative pressure region 20 is smaller than that of the base portion 61.

The negative pressure chamber 21 is formed from a surface depression of the bottom plate 10, the surface depression forming an air passage communicating with each other, the air passage dividing the surface not depressed into a plurality of support bosses 22. Preferably, the air passages are distributed in the negative pressure area 20 vertically and horizontally, the width of the air passages is 5-10mm, the depth of the air passages is 5-10mm, the supporting bosses 22 are divided into rectangular shapes by the air passages, and each rectangular supporting boss 22 is symmetrically distributed in the negative pressure area 20. At the center of the negative pressure chamber 21, an air hole penetrating through the bottom plate 10 is provided, and the air hole communicates with the negative pressure assembly 40. The negative pressure assembly 40 is used for generating negative pressure for the negative pressure area 20 so as to absorb the base portion 61 of the thin-wall frame-shaped workpiece 60. In this embodiment, the negative pressure assembly 40 includes a negative pressure generator 41 disposed on the back of the base plate 10 and using compressed air as a source of air, a set of compressed air pipes 43, and a compressed air switching valve 42. The compressed air switching valve 42 is used for controlling the on-off of the compressed air, and also plays a role in indirectly controlling the start and stop of the negative pressure generator 41.

The workpiece 60 is placed in the negative pressure area 20, the negative pressure generator 41 is connected, air in the air passage is pumped out from the air hole, the negative pressure cavity 21 forms a negative pressure environment, and the workpiece 60 is fixed on the negative pressure area 20 under the action of negative pressure adsorption. The work piece 60 is caused to lie flat against the negative pressure region 20 due to the suction effect of the negative pressure, and the base portion 61 of the thin-walled frame work piece 60 is kept flat thanks to the supporting effect of the plurality of supporting bosses 22.

The soleplate 10 further comprises a buffer groove 23 recessed around the negative pressure region 20. The air passage at the edge of the negative pressure cavity 21 and the buffer groove 23 form a circle of sealing wall which is flush with the bottom plate 10 in height by the inner and outer package. The buffer groove 23 surrounds an area smaller than that of the base portion 61, and the recess depth of the buffer groove 23 is larger than that of the negative pressure region 20. The inner ring of the sealing wall is a concave negative pressure cavity 21, and the outer ring is a buffer groove 23. When the workpiece 60 is placed in the negative pressure area 20, the negative pressure cavity 21 is recessed and the buffer groove 23 is respectively enclosed with the workpiece 60 to form an inner air passage and an outer air passage, and the inner air passage and the outer air passage are separated by a sealing wall. The inner airway and the outer airway together form a double seal for negative pressure adsorption. When the sealing wall is tightly adhered to the workpiece 60, the air tightness of the inner air passage is good, and the negative pressure adsorption effect of the negative pressure cavity 21 on the workpiece 60 is good. When the sealing wall is attached to the workpiece 60 to generate a gap, and the negative pressure of the inner air passage fails, the inner air passage and the outer air passage can be together, the air pressure of the outer air passage is equal to that of the inner air passage and the air pressure of the outer air passage is negative pressure, the workpiece 60 is tightly attached to the tool bottom plate 10, and the workpiece 60 is adsorbed on the tool bottom plate 10 by the negative pressure. Preferably, the sealing wall and the bottom plate 10 are coated with a rubber coating of uniform thickness to enhance the air tightness of the negative pressure region 20 with the workpiece 60 and to enhance the firmness of the suction of the workpiece 60.

In order to match the fixation of the work piece 60 with the boss connected to the bottom of the annular wall and the fixture, the bottom plate 10 is further provided with two positioning pins 50, the two positioning pins 50 are diagonally distributed on two sides of the negative pressure region 20 and correspond to the negative pressure region, the boss connected to the bottom of the annular wall is provided with two positioning holes 64, and the positioning pins 50 are inserted and positioned with the positioning holes 64.

Preferably, one of the two positioning holes 64 is a circular through hole 641 and the other is a long hole 642. The circular through hole 641 is tightly matched with the corresponding positioning pin 50, and the long hole 642 and the corresponding positioning pin 50 can relatively move in the length direction of the long hole 642, so that fine adjustment of the position of the workpiece 60 is realized. Because the locating pins 50 are diagonally distributed on two sides of the negative pressure region 20, the work of the negative pressure region 20 is not affected, and the fixture can be used for fixing the workpiece 60 no matter whether the thin-wall frame-shaped workpiece 60 is provided with a boss or not.

Considering that the negative pressure adsorption of the workpiece 60 and the tool depends on the air tightness of the negative pressure, any factors breaking the air tightness can lead to failure of the adsorption. Particularly, during the machining process, the tool acts on the workpiece 60, and the workpiece 60 is liable to shake. At opposite sides of the negative pressure region 20, a pressing assembly 30 is respectively disposed for pressing against the diagonal corner of the frame 62, which is helpful for enhancing the stability of the workpiece 60 and reducing the wobble of the workpiece 60.

Since the negative pressure generator 41 is driven by compressed air, the driving source of the compression joint assembly 30 is also compressed air in the present embodiment due to the simple tooling structure and the unified power source. The compression joint assembly 30 comprises a compression joint telescopic piece 31 arranged on the bottom plate 10, a hinge seat 32 fixed on the bottom plate 10 and a compression joint block 33, wherein the middle part of the compression joint block 33 is hinged with the hinge seat 32, the compression joint telescopic piece 31 is hinged with one end of the compression joint block 33, and the other end of the compression joint block 33 faces to the frame part 62. The compression telescopic member 31 is a compressed air driven cylinder piston, and the cylinder piston moves upward under the drive of compressed air, and jacks up the compression block 33 connected with the piston, and the compression block 33 moves downward under the leverage and abuts against the frame 62.

As shown in fig. 5 to 7, on the basis of the foregoing embodiment, the present utility model provides another thin-walled frame-shaped workpiece processing tool, which includes a base plate 10, two negative pressure areas 20, namely, a first negative pressure area 20 and a second negative pressure area 20, and the length direction of the first negative pressure area 20 and the length direction of the second negative pressure area 20 intersect. Each negative pressure zone 20 includes a negative pressure cavity 21 recessed from the surface and two crimp assemblies 30 mounted at spaced apart locations in the respective negative pressure zone 20. The two negative pressure regions 20 share a set of negative pressure components 40.

The negative pressure assembly 40 includes a negative pressure generator 41, a three-way valve 44, a switching valve 42, and a set of compressed air lines 43. The switching valve 42 is a two-in one-out switching valve 42, wherein one inlet is communicated with the compressed air, and the other inlet is in an open state and is communicated with the atmosphere. The outlet of the switching valve 42 is connected to the negative pressure generator 41, the negative pressure port of the negative pressure generator 41 is connected to one port of the three-way valve, and the other two ports of the three-way valve are respectively communicated with the first negative pressure zone 20 and the second negative pressure zone 20. When the switching valve 42 is opened from the atmosphere to the compressed air, the negative pressure generator 41 starts to operate, and the negative pressure region 20 builds up a negative pressure.

The tool can simultaneously clamp two workpieces 60, and the two workpieces 60 are respectively placed transversely and longitudinally. Thanks to the principle that the fixture utilizes negative pressure adsorption, the fixture is assisted by the fixing of the crimping component 30, the contact area of the fixture and the workpiece 60 is small, and a large number of machining surfaces are exposed on the surface of the workpiece 60. The two workpieces 60 placed in the transverse direction and the longitudinal direction can simultaneously process the exposed transverse frame portion 62 and the exposed longitudinal frame portion 62 respectively. In this embodiment, the two thin-walled frame-shaped workpieces 60 can be machined by only changing the left and right positions once, so that the positioning accuracy and the machining efficiency are effectively improved.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.

It is to be understood that the utility model is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims

1. The utility model provides a processing frock of thin wall frame work piece, thin wall frame work piece includes planar base portion and encircles the frame portion of base portion, its characterized in that, processing frock includes:

2. The tooling of claim 1, wherein the negative pressure cavity is recessed from the surface of the base plate, and a plurality of support bosses are spaced apart from each other in the negative pressure cavity.

3. The tooling of claim 1, wherein the bottom plate further comprises a buffer groove recessed around the negative pressure region, the buffer groove surrounding an area smaller than an area of the base portion.

4. A tooling according to claim 3, wherein the buffer groove has a recess depth greater than the recess depth of the negative pressure region.

5. The tooling of claim 1, wherein the negative pressure assembly is connected to a center of the negative pressure cavity.

6. The tooling of claim 1, wherein the base plate is further provided with at least one locating pin spaced from the negative pressure region, the thin-walled frame-shaped workpiece comprises a connecting boss protruding out of the annular wall, the connecting boss is provided with a locating hole, and the locating pin is inserted into and located with the locating hole.

7. The tooling of claim 6, wherein two of the locating pins are diagonally distributed on two sides of the negative pressure region.

8. The tooling of claim 1, wherein at least one of the crimping assemblies is disposed on opposite sides of each negative pressure region, and two of the crimping assemblies are crimped to diagonally opposite corners of the frame portion.

9. The tooling of claim 1, wherein the negative pressure assembly comprises a control valve connected to a gas source, a negative pressure tube connecting the control valve and the negative pressure chamber, the control valve controlling the opening and closing of the negative pressure chamber.

10. The tooling of claim 1, wherein the negative pressure zone comprises first and second zones spaced apart, the first zone having a length that intersects the second zone.