CN212329393U

CN212329393U - Box part preparation mould

Info

Publication number: CN212329393U
Application number: CN202020961446.1U
Authority: CN
Inventors: 杨万忠; 张成浩
Original assignee: Wanshengxing Precision Technology Huizhou Co ltd
Current assignee: Wanshengxing Precision Technology Huizhou Co ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-01-12
Anticipated expiration: 2030-05-29

Abstract

The application provides a box part preparation mould, the mould includes cope match-plate pattern and lower bolster, and the cooperation forms one between cope match-plate pattern and the lower bolster and is used for treating the fashioned shaping chamber of machined part, treats that the machined part includes the box bottom and encloses to be located the box wall of box bottom is equipped with the storage area between box wall and the box bottom, wherein: the upper template is provided with an auxiliary punch and an air inlet channel which are used for pressing the inner side of the box bottom; the lower template is provided with a forming cavity wall and an exhaust channel, wherein the forming cavity wall and the exhaust channel are used for pressing the box bottom and the outer side of the box wall; the die also comprises a heating device, and the heating devices are respectively arranged in the upper template and the lower template; when the upper template and the lower template are matched, an air expansion area is formed in the molding cavity by matching the air inlet channel and the air outlet channel; and placing the storage area of the workpiece to be processed in an air expansion area for high-temperature air expansion forming. The embodiment of the application improves the forming quality of the box body parts, and further improves the manufacturing yield of the box body parts.

Description

Box part preparation mould

Technical Field

The application relates to the field of automation equipment, in particular to a box part preparation mould.

Background

In order to improve the texture of the product, the thin metal plate is light and thin, so that the external shell structure of 5G, communication, television products or other electronic products is realized, the advantages of thickness and weight are obtained, and the appeal of high-quality and high-tech feeling in various current large-brand factories is achieved.

In the forming process of the box body part, generally, the metal plate is subjected to stamping and deep drawing, so that the metal plate is formed into a corresponding part shape by utilizing a stamping and deep drawing process. In order to seek better shape characteristics, complex structures such as corners or other structures requiring reverse buckling, inward folding and the like are often arranged on the box walls or other positions of the box parts.

However, by means of stamping and drawing, wrinkling and scratching of complex structures or cracking caused by uneven wall thickness are easy to occur, the forming quality of box body parts is difficult to control, and the yield in the manufacturing process is relatively low.

SUMMERY OF THE UTILITY MODEL

The application provides a box body part preparation mould can improve the manufacturing yields of box body part.

The embodiment of the application discloses box body part preparation mould, the mould includes cope match-plate pattern and lower bolster, the cooperation forms one between cope match-plate pattern and the lower bolster and is used for treating the fashioned shaping chamber of machined part, treat that the machined part includes the box bottom and encloses and locate the box wall of box bottom, be equipped with the storage area between box wall and the box bottom, wherein:

the upper die plate is provided with an auxiliary punch and an air inlet channel, wherein the auxiliary punch is used for pressing the inner side of the box bottom, one port of the air inlet channel is communicated with the outside of the die, and the other port of the air inlet channel penetrates through the auxiliary punch and is communicated with the forming cavity;

the lower template is provided with a forming cavity wall and an exhaust channel, the forming cavity wall and the exhaust channel are used for pressing the box bottom and the outer side of the box wall, one port of the exhaust channel is communicated with the outside of the die, and the other port penetrates through the forming cavity wall to be communicated with the forming cavity;

the die also comprises heating devices which are respectively arranged inside the upper template and the lower template;

when the upper template and the lower template are matched, the air inlet channel and the air outlet channel are matched to form an inflatable area in the forming cavity; and the storage area of the workpiece to be machined is placed in the air inflation area for high-temperature air inflation forming.

Optionally, the storage area of the workpieces to be processed includes:

the deep drawing material storage area is positioned between the box bottom and the box wall; and

and the reverse-pull material storage area is positioned at the periphery of the box wall.

Optionally, a material pressing plate for pressing the workpiece to be machined and sealing the forming cavity is arranged between the upper die plate and the lower die plate.

Optionally, an inverted structure for inverting the box wall of the workpiece to be machined is arranged on the forming cavity wall of the lower template;

when the upper template and the lower template are assembled, the inverted buckle structure is opposite to the material storage area of the workpiece to be machined.

Optionally, the lower template is provided with a demolding slide block for demolding the workpiece to be processed;

the demolding slider can obliquely slide relative to the horizontal direction, and the reversing structure is arranged on the outer side of the demolding slider.

Optionally, the reverse buckling structure is provided with a convex edge for forming a reverse buckling corner at the edge of the box wall opposite to the piece to be processed.

Optionally, when the upper mold plate and the lower mold plate are closed, wherein:

the reverse buckling structure is opposite to the deep drawing material storage area of the workpiece to be machined;

and a material pressing plate used for pressing the workpiece to be machined and sealing the forming cavity is arranged between the upper template and the lower template, and the area between the convex edge and the material pressing plate is opposite to the reverse-pulling material storage area of the workpiece to be machined.

Optionally, the heating device includes a plurality of heat pipes, and the heat pipes are uniformly arranged in the upper template and the lower template.

From the above, according to the box body part manufacturing method and the box body part manufacturing die in the embodiment of the application, the to-be-processed piece provided with the storage area is subjected to high-temperature air inflation, so that the storage area material of the to-be-processed piece can be subjected to air inflation forming in the manufacturing die, the box wall of the to-be-processed piece is used for stretching compensation, complex structures such as corners or back-off structures are formed, the forming quality of the box body part is improved, and the manufacturing yield of the box body part is further improved.

Drawings

Fig. 1 is a schematic structural diagram of a workpiece to be processed according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a first state of a box part preparation mold according to an embodiment of the present application.

Fig. 3 is a structural schematic diagram of a second state of the box part preparation mold according to the embodiment of the present application.

Fig. 4 is a structural schematic diagram of a third state of the box part preparation mold according to the embodiment of the present application.

Detailed Description

The following detailed description of the preferred embodiments of the present application, taken in conjunction with the accompanying drawings, will make the advantages and features of the present application more readily appreciated by those skilled in the art, and thus will more clearly define the scope of the invention.

Referring to fig. 1, a structure of a workpiece to be processed according to an embodiment of the present application is shown.

Wherein the piece to be worked is in the form of a transition of the product obtained by preforming.

As shown in fig. 1, in order to reduce the problems of wrinkling, scratching, or cracking caused by uneven wall thickness during the forming process, the workpiece 1 to be processed includes a box bottom and a box wall surrounding the box bottom, and a storage area is arranged between the box wall and the box bottom.

The box bottom length L of the workpiece 1 to be machined is smaller than the box bottom length of the formed box body part, and the height H of the workpiece 1 to be machined is smaller than the box bottom length of the formed box body part, so that material supplementing is carried out by utilizing a material storage area in the gas expansion forming process, and excessive extension thinning is avoided.

Through in the box wall, and the storage area between and the box bottom for can let more materials compensate when the physiosis shaping in follow-up forming process, can reduce the percentage of extension when the final high temperature physiosis of corner material, thereby avoid the serious attenuation of material to lead to cracked risk.

In one embodiment the magazine of workpieces 1 to be worked comprises a drawing magazine 11 and a reverse drawing magazine 12. The deep-drawing stock area 11 is located between the box bottom and the box wall, and the counter-drawing stock area 12 is located at the periphery of the box wall.

In particular, the drawing stock zone 11 may be provided with convex hulls for forming and drawing four box walls to compensate for the material of the four formed box walls. The reverse draw stock area 12 may be pre-formed with a convex hull for reverse drawing, the preformed reverse draw forcing the peripheral material to flow to this area to compensate for the lack of material in the periphery of the box wall due to draw.

Since the material consumption of the reverse magazine is greater in relation to the material consumption of the deep-drawing magazine 11 during the forming process, the material reserve of the reverse-drawing magazine 12 can be greater in relation to the material reserve of the deep-drawing magazine 11, i.e. the preformed convex hull size is greater.

Referring to fig. 2, a first state structure of a mold for manufacturing a box part according to an embodiment of the present disclosure is shown.

The first state is a mold closing state of the box part preparation mold.

As shown in fig. 2, the box body part preparation mold comprises an upper mold plate 2 and a lower mold plate 3, and a molding cavity for molding the to-be-processed part 1 is formed between the upper mold plate 2 and the lower mold plate 3 in a matching manner. Namely, the workpiece 1 to be processed is placed in a forming cavity for high-temperature air inflation forming.

The upper template 2 is provided with an auxiliary punch 21 and an air inlet channel 22 which are used for pressing the inner side of the box bottom, one port of the air inlet channel 22 is communicated with the outside of the die, and the other port penetrates through the auxiliary punch 21 and is communicated with the forming cavity.

The gas inlet end of the gas inlet channel 22 can be connected to a gas supply device for supplying gas, so that the gas of the gas supply device enters the molding cavity through the gas inlet channel 22. The gas may be an inert gas such as helium or the like. The head size of the auxiliary punch 21 of the upper template 2 can be close to the inner side of the bottom of the workpiece 1 to be processed, so that the bottom of the workpiece 1 to be processed can be pressed when the template is closed, and the subsequent expansion stretching of the storage area of the workpiece 1 to be processed is facilitated.

In particular, the inlet passage 22 may comprise a plurality of ports, which may be arranged opposite to the magazine of workpieces 1 to be machined, so as to allow the gas to pass directly into the inflation zone of the forming cavity.

The lower template 3 is provided with a forming cavity wall 31 and an exhaust channel 32, wherein the forming cavity wall 31 and the exhaust channel 32 are used for pressing the box bottom and the outer side of the box wall, one port of the exhaust channel 32 is communicated with the outside of the mould, and the other port penetrates through the forming cavity wall 31 to be communicated with the forming cavity.

The shape of the forming cavity wall 31 corresponds to the shape of the outer side of the box body part, so that the workpiece 1 to be machined can be attached to the forming cavity wall 31 after being subjected to inflation forming and can be shaped by the forming cavity wall 31. The exhaust passage 32 is used for exhausting gas between the lower template 3 and the workpiece 1 to be processed in the forming cavity, so that the gas pressure in the region does not influence the ballooning process.

In one embodiment, in order to realize the inflation molding, a pressure plate 5 for compressing the workpiece 1 to be processed and sealing the molding cavity is arranged between the upper die plate 2 and the lower die plate 3. Treat the compressing tightly of machined part 1 through pressure flitch 5, not only can avoid treating that machined part 1 shifts, make moreover treat and form a confined space between machined part 1 and the cope match-plate pattern 2, be convenient for let in gas and form the high pressure.

The die further comprises a heating device 4, and the heating device 4 is respectively arranged inside the upper die plate 2 and the lower die plate 3. Specifically, the heating device 4 may include a plurality of heat pipes, and the heat pipes are uniformly arranged in the upper mold plate 2 and the lower mold plate 3.

It is understood that the heating device 4 of the mold may adopt other heating forms, such as a semiconductor heating form, and the specific heating form of the mold is not limited herein.

When the upper template 2 and the lower template 3 are matched, an air inflation area is formed in the molding cavity by matching the air inlet channel 22 and the air outlet channel 32; the storage area of the workpiece 1 to be processed is placed in an air inflation area for high-temperature air inflation forming.

Referring to fig. 3, a second state structure of the mold for preparing the box body part according to the embodiment of the present application is shown.

Wherein, the second state structure of this box body part preparation mould is the high temperature physiosis state.

When high-temperature inflation is needed, the die is heated firstly, so that the workpiece 1 to be processed is subjected to high temperature to improve the ductility of the workpiece, and the material in the storage area can be stretched and flowed along with the inflation more easily.

Then, gas is introduced into the molding cavity through the gas inlet passage 22, so that the part to be processed 1 and the upper template 2 are in a high-pressure state. At this time, the material storage area of the workpiece 1 to be processed is inflated in the inflation area of the forming cavity in the process of squeezing and inflating by air pressure, and is extended to the forming cavity wall 31 to form the product form of the box body part.

In an embodiment, the forming cavity wall 31 of the lower template 3 is provided with an inverse-buckling structure 331 for inversely buckling the box wall of the workpiece 1 to be processed; when the upper and

lower mold plates

2 and 3 are closed, the reversing structure 331 is opposite to the storage area of the workpiece 1 to be processed.

The upper part of the inverted structure 331 is inverted relative to the middle part of the lower template 3, and the workpiece 1 to be processed can be matched with the inverted structure 331 after high-temperature air inflation to form a box wall inverted relative to the box bottom. When high-temperature air inflation is carried out, the drawing storage area 11 of the workpiece 1 to be processed is drawn towards one side of the reversing structure 331 under the action of air pressure, and air between the workpiece 1 to be processed and the forming cavity wall 31 is exhausted from the air inlet through the exhaust channel 32 to form a box wall.

In an embodiment, the undercut 331 is provided with a ledge 332 at the edge of the box wall opposite the piece 1 to be machined for forming an undercut corner. The convex edge 332 can make the workpiece 1 to be processed form an inverted corner in the stretching and storing area in the air inflation process so as to meet the processing requirement on the corner.

In one embodiment, the undercut 331 is opposite to the draw stock 11 of the workpiece 1 to be worked, while the area between the ledge 332 and the pressure plate 5 is opposite to the reverse draw stock 12 of the workpiece 1 to be worked. Through the above setting of the positions, the box wall of the to-be-processed workpiece 1 can be stretch-formed by the undercut 331 using the deep drawing storage area 11 of the to-be-processed workpiece 1, and the corner structure of the to-be-processed workpiece 1 can be stretch-formed by the convex edge 332 using the reverse drawing storage area 12 of the to-be-processed workpiece 1, so that the situation that the box wall is too thin in the forming process of the box body part is further avoided.

Of course, in addition to performing the inflation molding on the workpiece 1 in the mold by using the above-mentioned undercut structure 331 and the convex edge 332, other structures may be provided to extrude and stretch the magazine area to form a desired box structure, which is not limited in this application.

Through setting up protruding edge 332 and cooperating the storage area of treating machined part 1 and carry out the physiosis shaping, can solve traditional sheet metal shaping and can't obtain extremely the shortcoming of corner structure, improve the throughput to sheet metal's complex construction.

Referring to fig. 4, a third state structure of the mold for preparing the box body part according to the embodiment of the present application is shown.

In one embodiment, the preparation mold is heated and inert gas is injected into the molding cavity, and the preparation mold is heated to T ≧ 0.3 Ts. Wherein Ts is the superplastic temperature of the plate, and T is the temperature of the die. Through the heating, the fluidity of the material can be improved, and the material storage area of the workpiece to be machined can be molded by better matching with the air inflation.

In one embodiment, the heating process can control the deformation rate V of the workpiece to be processed to be less than or equal to 10 mm/s. On the principle that the product is not cracked and not seriously thinned, the material flow forming effect of the workpiece to be processed can be improved by a smaller deformation rate, and the forming quality of the workpiece to be processed is ensured.

In addition, in the process of injecting inert gas into the forming cavity to obtain high pressure, the pressure applied by the gas may be 1-100MPa, and of course, the pressure value may be set according to the characteristics of different materials, so that the ballooning process of the workpiece to be processed meets the processing requirements, and the specific pressure value is not limited herein.

Wherein, the third state of this box body part preparation mould is the demoulding state.

When the work piece after the gas pocket is demolded, can utilize the inlet channel to lose heart decompression earlier to carry out the drawing of patterns in order to.

In one embodiment, to facilitate demolding of box walls with undercut features, the undercut structure 331 may be provided as a demolding slide 33 for demolding the part 1 to be processed; the demolding slide 33 can slide obliquely relative to the horizontal direction, for example, slide obliquely upward at a certain angle, so that the molded workpiece 1 to be processed is removed.

The reverse structure 331 is disposed outside the demolding slider 33, that is, the reverse structure 331 is mounted outside the demolding slider 33 or integrally formed with the demolding slider 33.

After demoulding the inflatable workpiece 1 to be machined, the workpiece can be further machined, and the redundant part is removed by cutting to obtain the box body part with the inverted buckle structure 331 and the corners. It can be understood that other specific machining and forming processes can be determined according to actual conditions after the workpiece 1 to be processed is subjected to high-temperature air inflation.

The cooperation of the material storage area and the high-temperature air inflation process arranged on the workpiece to be machined 1 can overcome the problem of product springback caused by elastic deformation in common forming such as cold stretching and cold inflation, and reduces the rigorous requirement of the traditional high-temperature air inflation forming on material refinement, thereby facilitating the popularization and application of the machining mode.

From the above, the box body part preparation mould in the embodiment of the application carries out high-temperature air inflation through waiting to add workpiece 1 that is equipped with the storage area for the storage area material of waiting to add workpiece 1 can utilize the air inflation shaping to let the box wall of waiting to add workpiece 1 be used for tensile compensation in the preparation mould, with complex structures such as formation corner or back-off, has improved the shaping quality of box body part, and then has improved the manufacturing yields of box body part.

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 above embodiments, and various changes can be made without departing from the spirit of the present application within the knowledge of those skilled in the art.

Claims

1. The utility model provides a box body part preparation mould, a serial communication port, the mould includes cope match-plate pattern and lower bolster, the cooperation forms one and is used for treating the fashioned shaping chamber of machined part between cope match-plate pattern and the lower bolster, treat that the machined part includes the box bottom and enclose to locate the box wall of box bottom, be equipped with the storage area between box wall and the box bottom, wherein:

2. The box body part preparation mold according to claim 1, wherein the magazine of parts to be machined comprises:

3. The box body part preparation mold according to claim 1, wherein a pressure plate for compressing the part to be processed and sealing the forming cavity is provided between the upper mold plate and the lower mold plate.

4. The box body part preparation mold according to claim 2, wherein an inverted structure for inverting the box wall of the part to be machined is arranged on the forming cavity wall of the lower template;

5. The cartridge body part preparation mold of claim 4, wherein:

the lower template is provided with a demoulding slide block for demoulding the workpiece to be machined;

6. The box part preparing mold according to claim 4 or 5, wherein the undercut structure is provided with a protruding edge for forming an undercut corner at an edge of the box wall with respect to the member to be processed.

7. The cartridge body part preparation mold of claim 6, wherein when the upper and lower mold plates are closed, wherein:

8. The mold for preparing a box body part according to claim 1, wherein the heating device comprises a plurality of heat pipes, and the heat pipes are uniformly arranged in the upper template and the lower template.