CN212331810U

CN212331810U - Sheet forming die

Info

Publication number: CN212331810U
Application number: CN202021891832.4U
Authority: CN
Inventors: 许木荣; 彭镜齐
Original assignee: Shenzhen Deke Precision Technology Co ltd
Current assignee: Shenzhen Deke Precision Technology Co ltd
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2021-01-12
Anticipated expiration: 2030-09-02

Abstract

The utility model discloses a sheet forming die, which comprises an upper die and a lower die, wherein the lower die comprises a lower die base plate, a die core component and a sheet positioning device, and the lower die base plate is fixedly connected with the sheet positioning device; the mold core assembly comprises an oil cylinder, a shoveling machine and a slide assembly, the oil cylinder is fixedly connected with the lower mold base plate, the shoveling machine is fixedly connected with the oil cylinder, and the shoveling machine is in sliding connection with the inclined surface of the slide assembly; a first through hole is formed in the lower die base plate, the slide assembly is in limit connection with the side wall of the first through hole, a second through hole is formed in the lower surface of the sheet positioning device, and the slide assembly is in clearance fit with the second through hole; when the shovel machine moves along the moving direction of the oil cylinder piston, the slide assembly can move along the direction vertical to the moving direction of the shovel machine and can penetrate through the second through hole under the action of the shovel machine. The mold core assembly can convert the original instant forming processing mode into the sectional forming according to different products during working, the technical problem that the sheet to be processed is easy to break during the original instant forming is avoided, and the processing yield is improved.

Description

Sheet forming die

Technical Field

The utility model relates to a mould manufacturing technical field especially relates to a sheet forming die.

Background

The existing sheet forming die is formed by hot pressing with high-pressure gas, and the dies on the market at present are formed by instantly die-casting a high-temperature sheet to be processed with high-pressure gas. In the processing process of the die, the problems of sheet breakage, inaccurate processing and the like frequently occur in the die-casting process due to uneven stress distribution on the surface of the die core and the surface of a sheet to be processed, and the reject ratio is higher.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems existing in the prior art, the utility model provides a sheet forming die to provide following technical scheme:

a sheet forming die comprises an upper die and a lower die, wherein the lower die comprises a lower die base plate, a die core assembly and a sheet positioning device, and the lower die base plate is fixedly connected with the sheet positioning device; the mold core assembly comprises an oil cylinder, a shoveling machine and a slide assembly, the oil cylinder is fixedly connected with the lower mold base plate through an oil cylinder connecting block, the shoveling machine is fixedly connected with an oil cylinder piston, and the slide assembly is arranged above the shoveling machine and is in sliding connection with the shoveling machine through an inclined plane; a first through hole matched with the slide assembly is formed in the lower die base plate, the slide assembly is in limit connection with the side wall of the first through hole, a second through hole is formed in the lower surface of the sheet positioning device, and the slide assembly is in clearance fit with the second through hole; when the oil cylinder drives the shovel machine to move along the moving direction of the oil cylinder piston, the slide assembly moves along the direction vertical to the moving direction of the shovel machine and can penetrate through the second through hole under the action of the shovel machine and the first through hole.

Further, be equipped with T shape engaging lug on the shovel machine, be equipped with first inclined plane on the T shape engaging lug, the position subassembly lower surface of going is equipped with the T shape draw-in groove with T shape engaging lug adaptation, be equipped with the second inclined plane in the T shape draw-in groove, first inclined plane with the second inclined plane meets, the T shape engaging lug with T shape draw-in groove sliding connection.

Further, the slide assembly comprises an exhaust insert, a mold core and a slide, wherein the mold core is clamped between the exhaust insert and the slide and is fixedly connected with the exhaust insert and the slide respectively; the exhaust insert comprises a breathable layer, the breathable layer is arranged on one side close to the upper die, a first exhaust channel is arranged in the exhaust insert, a second exhaust channel is arranged in the die core, a third exhaust channel is arranged in the slide, one end of the first exhaust channel is communicated with the breathable layer, the other end of the first exhaust channel is communicated with one end of the second exhaust channel, the other end of the second exhaust channel is communicated with one end of the third exhaust channel, and the other end of the third exhaust channel is communicated with the outside of the slide assembly.

Furthermore, the upper die comprises a panel and an air guide plate, the panel is fixedly connected with the air guide plate, an air inlet hole and an air outlet groove communicated with the air inlet hole are formed in the panel, and a third through hole communicated with the air outlet groove is formed in the middle of the air guide plate in an array mode.

Further, the lower die further comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with the lower surface of the lower die base plate, the bottom surface of the shovel machine is connected with the upper surface of the bottom plate in a sliding mode, a first wear-resistant block is arranged at the joint of the bottom plate and the shovel machine, and a second wear-resistant block is arranged at the position, corresponding to the first wear-resistant block, of the bottom surface of the shovel machine.

Furthermore, a third wear-resistant block is arranged on the second inclined plane, and a fourth wear-resistant block is arranged on 4 surfaces of the slide matched with the first through hole.

The heating device comprises a temperature control box, a heating rod and a temperature sensing wire, wherein the heating rod and the temperature sensing wire are respectively electrically connected with the temperature control box; the panel, the sheet positioning device, the slide, the lower die base plate and the bottom plate are respectively and fixedly provided with the heating rod and the temperature sensing line.

Furthermore, the sheet positioning device comprises an upper pressing plate and a lower pressing plate, one end of the upper pressing plate is hinged with one end of the lower pressing plate, the upper pressing plate is detachably connected with the opposite end of the hinged end of the lower pressing plate, a groove is formed in the middle of the bottom surface of the lower pressing plate, and the second through hole is formed in the groove; the matching surface of the lower pressing plate and the upper pressing plate is provided with a first positioning device, and the corresponding position of the upper pressing plate and the first positioning device is provided with a second positioning device.

Furthermore, the first positioning structure comprises an annular positioning bulge arranged on the outer side of the groove and positioning columns respectively arranged on the outer sides of 4 corners of the positioning bulge; the second positioning structure comprises a positioning hole arranged at a position corresponding to the positioning column and a positioning groove arranged at a position corresponding to the positioning bulge, the positioning hole is matched with the positioning column, and the positioning groove is matched with the positioning bulge.

Furthermore, the positioning protrusion comprises a first positioning protrusion and a second positioning protrusion arranged on the outer side of the first positioning protrusion, and the height of the first positioning protrusion is smaller than that of the second positioning protrusion.

Compared with the prior art, the utility model discloses possess following beneficial effect:

1. the mold core assembly structure can convert the original instant forming processing mode into the sectional forming according to different products by matching with the lower mold base plate, and the technical problem that the original instant forming sheet to be processed is easy to collapse can be effectively avoided.

2. The heating device enables the mold to be always in a constant temperature state when the mold works; on the other hand, the arrangement of the exhaust insert and the exhaust channel can exhaust trapped air generated during machining to the maximum extent, and machining accuracy and yield can be improved.

Drawings

FIG. 1 is a schematic view of the exploded structure of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 5 is an enlarged view of portion C of FIG. 4;

FIG. 6 is an enlarged view of portion D of FIG. 4;

FIG. 7 is an exploded view of the mold core assembly of the present invention;

FIG. 8 is an exploded view of the slide module of the present invention;

fig. 9 is a schematic view of the panel structure of the present invention;

FIG. 10 is a structural view of the airway structure of the present invention;

fig. 11 is a schematic structural view of the upper press plate of the present invention;

fig. 12 is a schematic view of the structure of the lower pressing plate of the present invention;

fig. 13 is a schematic view of the panel of the present invention.

Detailed Description

To further illustrate the technical means and technical effects of the present invention, the following describes a preferred embodiment of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 13, a sheet forming die includes an upper die and a lower die. The upper die comprises a panel 1 and an air guide plate 2, and the panel 1 and the air guide plate 2 are fixedly connected through screws. Be equipped with inlet port 101 in the panel 1, during operation, high-pressure gas enters into inside the mould from inlet port 101, and the lower surface of panel 1 is equipped with out the air slot 102, and inlet port 101 communicates with out air slot 102. Third through holes 201 penetrating through the upper surface and the lower surface of the air guide plate 2 are arranged in an array at the positions of the air guide plate 2 corresponding to the air outlet grooves 102. In order to prevent high-pressure gas from leaking, two annular clamping grooves are formed in the outer side of the third through hole 201, sealing rings 202 are fixedly arranged in the clamping grooves, and the joints of the two sealing rings 202 are not located in the same direction.

The lower die comprises a sheet positioning device 3, a die core assembly 4, a lower die base plate 5 and a bottom plate 6. The sheet positioning device 3 comprises an upper pressing plate 31 and a lower pressing plate 32, and the lower pressing plate 32 is fixedly connected with the lower die base plate 5 through screws. One end of the upper pressure plate 31 is hinged with one end of the lower pressure plate 32, and the other end of the hinged end of the upper pressure plate 31 and the other end of the hinged end of the lower pressure plate 32 are detachably connected in a snap mode. The middle of the lower pressing plate 32 is provided with a groove 321, and the bottom of the groove 321 is provided with a second through hole 322. When processing, the sheet to be processed is fixed between the upper pressing plate 31 and the lower pressing plate 32, in order to prevent the sheet to be processed from moving away in the processing process, a first positioning device is fixedly arranged on the lower pressing plate 32, and a second positioning device matched with the first positioning device is fixedly arranged on the upper pressing plate 31. The first positioning device comprises two annular positioning bulges 323 arranged at the outer sides of the periphery of the groove 321 and first positioning columns 324 respectively arranged at the outer sides of four corners of the positioning bulges 323; wherein the height of the first positioning protrusion 3231 adjacent to the groove 321 is smaller than the height of the second positioning protrusion 3232 adjacent to the first positioning column 324. The second positioning means includes a first positioning hole 311 respectively fitted with the 4 first positioning posts 324 and two annular positioning grooves 312 respectively fitted with the first positioning projection 3231 and the second positioning projection 3232. In order to facilitate accurate closing and positioning of the upper pressing plate 31 and the lower pressing plate 32, tapered positioning columns 325 are respectively and fixedly arranged on 4 side edges of the upper surface of the lower pressing plate 32, and tapered positioning holes 313 matched with the tapered positioning columns 325 are arranged at positions of the upper pressing plate 32 corresponding to the tapered positioning columns 325. For the convenience of operation, a first handle 314 is fixedly arranged on the side of the detachable end of the upper pressure plate 31, and a clamping block 315 is fixedly arranged on the side of the first handle 314. The detachable side edge of the lower pressing plate 32 is fixedly provided with a second handle 326, and the second handle 326 is fixedly provided with a buckle 327 matched with the clamping block 315. The mold core assembly 4 comprises an oil cylinder 401, a shovel machine 402 and a slide assembly 403, wherein the oil cylinder 401 is fixedly connected with the lower mold base plate 5 through an oil cylinder connecting block 404, and the shovel machine 402 is fixedly connected with an oil cylinder piston 406 through a shovel machine base 405. A T-shaped connecting lug 407 is arranged on the shovel machine 402, and a first inclined surface 408 is arranged on the upper surface of the T-shaped connecting lug 407. The lower surface of slide subassembly 403 is equipped with T shape draw-in groove 409, is equipped with the second inclined plane 410 with first inclined plane 408 adaptation in the T shape draw-in groove 409, and T shape engaging lug 407 and T shape draw-in groove 409 sliding connection. The lower die base plate 5 is provided with a first through hole 51 matched with the slide assembly 403, and the slide assembly 403 is in limit connection with the side wall of the first through hole 51. The bottom plate 6 is fixedly connected with the bottom surface of the lower die base plate 5 through screws, and the upper surface of the bottom plate 6 is connected with the lower surface of the shovel machine 402 in a sliding mode.

During assembly, the oil cylinder 401 is connected with an external control system and then fixed on the lower die base plate 5, so that the shovel machine 402 is fixed relative to the lower die base plate 5, the lower pressing plate 32 is fixedly connected with the upper surface of the lower die base plate 5, the positions of the second through holes 322 and the first through holes 51 correspond to each other, the bottom plate 6 is fixedly connected with the lower surface of the lower die base plate 5 through screws, and the slide assembly 403 is arranged in the first through holes 51 and is in sliding connection with the shovel machine 402. In operation, the cylinder 401 drives the cylinder piston 406 to move, so as to drive the shovel machine 402 to move along the direction of the movement of the cylinder piston 406, and under the action of the sliding fit of the inclined surfaces of the first inclined surface 408 and the second inclined surface 410 and the reaction force of the side wall of the first through hole 51, the slide assembly 403 moves along the direction perpendicular to the direction of the movement of the cylinder piston 406 and passes through the second through hole 322. The speed and time period of relative movement of the line subassembly 403 can be controlled by controlling the speed and time period of movement of the ram piston 406.

In another embodiment, in order to effectively discharge trapped air generated during hot press forming, on the basis of the above mold structure, the slide assembly 403 includes a 3D metal printing exhaust insert 411, a mold core 412 and a slide 413, the upper surface of the mold core 412 is provided with a first placing groove 414, the exhaust insert 411 is fixed in the first placing groove 414 by screws, and the thickness of the exhaust insert 411 is greater than or equal to the depth of the first placing groove 414; a boss 415 is arranged in the middle of the lower surface of the mold core 412, and first limiting steps 416 are arranged around the boss 415; a second placing groove 417 matched with the boss 416 is arranged in the middle of the upper surface of the row position 413, the depth of the second placing groove 417 is smaller than or equal to the height of the boss 416, and second limiting steps 418 are arranged around the side edges of the second placing groove 417; the boss 416 on the lower surface of the mold core 414 is fixedly disposed in the second placement groove 417, and the first limit step 416 is fixedly connected with the second limit step 417. The exhaust insert 411 is provided with a ventilation layer 419, a plurality of ventilation holes are formed in the ventilation layer 419, and the ventilation layer 419 is arranged on one side close to the upper die; a first exhaust channel 420 is arranged in the exhaust insert 411, a second exhaust channel 421 is arranged in the mold core 412, the second exhaust channel 421 penetrates through the upper surface and the lower surface of the mold core 412, and a third exhaust channel 422 is arranged in the slide 413; one end of the first exhaust channel 420 is communicated with the breathable layer 419, the other end of the first exhaust channel is communicated with one end of the second exhaust channel 421, the other end of the second exhaust channel 421 is communicated with one end of the third exhaust channel 422, and the other end of the third exhaust channel 422 is communicated with the outside of the slide assembly 403.

In another embodiment, in order to reduce wear and increase the service life of the die, on the basis of the above die structure, a first wear-resistant block 7 is arranged at the joint of the bottom plate 6 and the shovel 402, a second wear-resistant block 8 is fixedly arranged on the bottom surface of the shovel 402 at a position corresponding to the first wear-resistant block 7, a third wear-resistant block 9 is fixedly arranged on the second inclined surface 410, and a fourth wear-resistant block 10 is arranged on 4 surfaces of the slide 413 matched with the side wall of the first through hole 51; the first wear-resistant block 7, the second wear-resistant block 8, the third wear-resistant block 9 and the fourth wear-resistant block 10 are subjected to nitriding treatment to form nitride layers.

In another embodiment, in order to keep the mold in a constant temperature state all the time to obtain a higher processing yield, the sheet forming mold further comprises a heating device, the heating device comprises a temperature control box, a heating rod 11 and a temperature sensing wire 12, and the heating rod 11 and the temperature sensing wire 12 are respectively electrically connected with the temperature control box; heating rod mounting holes are respectively formed in the panel 1, the upper pressing plate 31, the lower pressing plate 32, the slide 413, the lower die base plate 5 and the bottom plate 6, and the heating rods 11 are respectively fixed in the mounting holes; temperature sensing wire grooves 13 are respectively formed in the panel 1, the upper pressure plate 31, the lower pressure plate 32, the slide 413, the lower die cushion plate 5 and the bottom plate 6, and the temperature sensing wires 12 are respectively arranged in the temperature sensing wire grooves 13 and fixed by screws through the pressure plates 14. According to the continuous practice, when the mold temperature is controlled at 150 ℃, the yield of the sheet is the highest, so that the heating temperature of the heating rod 11 is set at 150 ℃.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Claims

1. The sheet forming die comprises an upper die and a lower die, and is characterized in that the lower die comprises a lower die base plate, a die core assembly and a sheet positioning device, and the lower die base plate is fixedly connected with the sheet positioning device;

the mold core assembly comprises an oil cylinder, a shoveling machine and a slide assembly, the oil cylinder is fixedly connected with the lower mold base plate through an oil cylinder connecting block, the shoveling machine is fixedly connected with an oil cylinder piston, and the slide assembly is arranged above the shoveling machine and is in sliding connection with the shoveling machine through an inclined plane;

a first through hole matched with the slide assembly is formed in the lower die base plate, the slide assembly is in limit connection with the side wall of the first through hole, a second through hole is formed in the lower surface of the sheet positioning device, and the slide assembly is in clearance fit with the second through hole;

when the oil cylinder drives the shovel machine to move along the moving direction of the oil cylinder piston, the slide assembly moves along the direction vertical to the moving direction of the shovel machine and can penetrate through the second through hole under the action of the shovel machine and the first through hole.

2. The sheet forming die of claim 1, wherein the shoveling machine is provided with a T-shaped connecting lug, the T-shaped connecting lug is provided with a first inclined surface, the lower surface of the slide assembly is provided with a T-shaped clamping groove matched with the T-shaped connecting lug, the T-shaped clamping groove is internally provided with a second inclined surface, the first inclined surface is connected with the second inclined surface, and the T-shaped connecting lug is slidably connected with the T-shaped clamping groove.

3. The sheet forming die of claim 2, wherein the slide assembly includes a vented insert, a core, and a slide, the core being sandwiched between and fixedly attached to the vented insert and the slide, respectively;

the exhaust insert comprises a breathable layer, the breathable layer is arranged on one side close to the upper die, a first exhaust channel is arranged in the exhaust insert, a second exhaust channel is arranged in the die core, a third exhaust channel is arranged in the slide, one end of the first exhaust channel is communicated with the breathable layer, the other end of the first exhaust channel is communicated with one end of the second exhaust channel, the other end of the second exhaust channel is communicated with one end of the third exhaust channel, and the other end of the third exhaust channel is communicated with the outside of the slide assembly.

4. The sheet forming die of claim 3, wherein the upper die comprises a panel and an air guide plate, the panel is fixedly connected with the air guide plate, the panel is provided with an air inlet hole and an air outlet groove communicated with the air inlet hole, and the middle array of the air guide plate is provided with third through holes communicated with the air outlet groove.

5. The sheet forming die of claim 4, wherein the lower die further comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with the lower surface of the lower die backing plate, the bottom surface of the shovel is slidably connected with the upper surface of the bottom plate, a first wear-resistant block is arranged at the position where the bottom surface of the shovel is connected with the shovel, and a second wear-resistant block is arranged at the position where the bottom surface of the shovel corresponds to the first wear-resistant block.

6. The sheet forming die of claim 5, wherein a third wear-resistant block is arranged on the second inclined surface, and a fourth wear-resistant block is arranged on 4 surfaces of the row which are matched with the first through holes.

7. The sheet forming die of claim 6, further comprising a heating device, wherein the heating device comprises a temperature control box, a heating rod and a temperature sensing wire, and the heating rod and the temperature sensing wire are respectively electrically connected with the temperature control box;

the panel, the sheet positioning device, the slide, the lower die base plate and the bottom plate are respectively and fixedly provided with the heating rod and the temperature sensing line.

8. The sheet forming die of claim 7, wherein the sheet positioning device comprises an upper pressing plate and a lower pressing plate, one end of the upper pressing plate is hinged to one end of the lower pressing plate, the upper pressing plate is detachably connected with the opposite end of the hinged end of the lower pressing plate, a groove is formed in the middle of the bottom surface of the lower pressing plate, and the second through hole is formed in the groove;

the matching surface of the lower pressing plate and the upper pressing plate is provided with a first positioning device, and the corresponding position of the upper pressing plate and the first positioning device is provided with a second positioning device.

9. The sheet forming die of claim 8, wherein the first positioning structure comprises an annular positioning protrusion disposed outside the groove and positioning pillars disposed outside 4 corners of the positioning protrusion, respectively;

the second positioning structure comprises a positioning hole arranged at a position corresponding to the positioning column and a positioning groove arranged at a position corresponding to the positioning bulge, the positioning hole is matched with the positioning column, and the positioning groove is matched with the positioning bulge.

10. The sheet forming die of claim 9, wherein the positioning protrusion includes a first positioning protrusion and a second positioning protrusion disposed outside the first positioning protrusion, and a height of the first positioning protrusion is smaller than a height of the second positioning protrusion.