Sheet forming mold

Abstract

The present invention discloses a sheet forming mold, including an upper mold and a lower mold, wherein the lower mold includes a lower mold pad, a core assembly and a sheet positioning device, and the lower mold pad is fixedly connected to the sheet positioning device; the core assembly includes an oil cylinder, a shovel and a slide assembly, the oil cylinder is fixedly connected to the lower mold pad, the shovel is fixedly connected to the oil cylinder, and the shovel is connected to the inclined sliding surface of the slide assembly; a first through hole is provided on the lower mold pad, the slide assembly is limitedly connected to the side wall of the first through hole, a second through hole is provided on the lower surface of the sheet positioning device, and the slide assembly is gap-matched with the second through hole; when the shovel moves along the direction of movement of the oil cylinder piston, under the action of the shovel and the first through hole, the slide assembly moves in a direction perpendicular to the direction of movement of the shovel and can pass through the second through hole. When the core assembly is working, it can convert the original instant forming processing method into segmented forming according to different products, avoiding the technical problem that the original instant forming sheet to be processed is easy to collapse, and improving the processing yield.

Description

Technical Field

[0001] The invention relates to the technical field of mold manufacturing, in particular to a sheet forming mold. Background Art

[0002] Existing sheet forming molds are all hot-pressed with high-pressure gas. Currently, such molds on the market use high-pressure gas to instantly die-cast the high-temperature sheet to be processed. During the processing of such molds, due to the uneven stress distribution on the surface of the mold core and the surface of the sheet to be processed, problems such as sheet collapse and inaccurate processing often occur during the die-casting process, and the defect rate is high. Summary of the invention

[0003] In order to overcome the problems existing in the above-mentioned prior art, the present invention provides a sheet forming mold and provides the following technical solutions:

[0004] A sheet forming mold comprises an upper mold and a lower mold, the lower mold comprises a lower mold pad, a core assembly and a sheet positioning device, the lower mold pad is fixedly connected to the sheet positioning device; the core assembly comprises a cylinder, a shovel and a slide assembly, the cylinder is fixedly connected to the lower mold pad via a cylinder connecting block, the shovel is fixedly connected to the cylinder piston, the slide assembly is arranged above the shovel and is connected to the shovel through an inclined sliding connection; a first through hole adapted to the slide assembly is provided on the lower mold pad, the slide assembly is limitedly connected to the side wall of the first through hole, a second through hole is provided on the lower surface of the sheet positioning device, and the slide assembly is clearance-matched with the second through hole; when the cylinder drives the shovel to move along the movement direction of the cylinder piston, under the action of the shovel and the first through hole, the slide assembly moves in a direction perpendicular to the movement direction of the shovel and can pass through the second through hole.

[0005] Furthermore, the shovel is provided with a T-shaped connecting ear, the T-shaped connecting ear is provided with a first inclined surface, the lower surface of the sliding assembly is provided with a T-shaped slot adapted to the T-shaped connecting ear, the T-shaped slot is provided with a second inclined surface, the first inclined surface is connected to the second inclined surface, and the T-shaped connecting ear is slidably connected to the T-shaped slot.

[0006] Furthermore, the slide assembly includes an exhaust insert, a mold core and a slide, the mold core is clamped between the exhaust insert and the slide, and is fixedly connected to the exhaust insert and the slide respectively; the exhaust insert includes an air-permeable layer, the air-permeable layer is arranged on a side close to the upper mold, the exhaust insert is provided with a first exhaust channel, the mold core is provided with a second exhaust channel, and the slide is provided with a third exhaust channel, one end of the first exhaust channel is connected to the air-permeable layer, and the other end is connected to one end of the second exhaust channel, the other end of the second exhaust channel is connected to one end of the third exhaust channel, and the other end of the third exhaust channel is connected to the outside of the slide assembly.

[0007] Furthermore, the upper mold includes a panel and an air guide plate, the panel is fixedly connected to the air guide plate, the panel is provided with an air inlet hole and an air outlet groove connected to the air inlet hole, and the middle array of the air guide plate is provided with a third through hole connected to the air outlet groove.

[0008] Furthermore, the lower mold also includes a bottom plate, the upper surface of the bottom plate is fixedly connected to the lower surface of the lower mold pad, the bottom surface of the shovel is slidably connected to the upper surface of the bottom plate, a first wear-resistant block is provided at the connection between the bottom plate and the shovel, and a second wear-resistant block is provided at the corresponding position of the bottom surface of the shovel and the first wear-resistant block.

[0009] Furthermore, a third wear-resistant block is provided on the second inclined surface, and a fourth wear-resistant block is provided on the four surfaces of the slide that cooperate with the first through hole.

[0010] Furthermore, it also includes a heating device, which includes a temperature control box, a heating rod and a temperature sensing wire, and the heating rod and the temperature sensing wire are electrically connected to the temperature control box respectively; the heating rod and the temperature sensing wire are fixedly provided on the panel, sheet positioning device, slide, lower mold pad and bottom plate respectively.

[0011] Furthermore, the sheet positioning device includes an upper pressure plate and a lower pressure plate, one end of the upper pressure plate is hinged to one end of the lower pressure plate, the upper pressure plate and the lower pressure plate are detachably connected at the opposite end of the hinged end, a groove is provided in the middle of the bottom surface of the lower pressure plate, and the second through hole is arranged in the groove; a first positioning device is provided on the mating surface of the lower pressure plate and the upper pressure plate, and a second positioning device is provided at the corresponding position of the upper pressure plate and the first positioning device.

[0012] Further, the first positioning structure includes an annular positioning protrusion arranged on the outside of the groove and positioning columns respectively arranged on the outside of the four corners of the positioning protrusion; the second positioning structure includes a positioning hole arranged at a position corresponding to the positioning column and a positioning groove arranged at a position corresponding to the positioning protrusion, the positioning hole is adapted to the positioning column, and the positioning groove is adapted to the positioning protrusion.

[0013] Further, the positioning protrusion includes a first positioning protrusion and a second positioning protrusion arranged outside the first positioning protrusion, and the height of the first positioning protrusion is smaller than the height of the second positioning protrusion.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The core assembly structure and the lower die pad can transform the original instant forming processing method into segmented forming according to different products, which can effectively avoid the technical problem of easy collapse of the original instant forming sheet to be processed.

[0016] The heating device keeps the mold at a constant temperature during operation; on the other hand, the setting of the exhaust insert and the exhaust channel can discharge the trapped air generated during processing to the greatest extent, which can improve the processing accuracy and yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the decomposed structure of the present invention;

[0018] Figure 2 It is a top view of the utility model;

[0019] Figure 3 yes Figure 2 Middle AA section;

[0020] Figure 4 yes Figure 2 Middle BB section;

[0021] Figure 5 yes Figure 4 Enlarged view of part C in the middle;

[0022] Figure 6 yes Figure 4 Enlarged view of part D in the middle;

[0023] Figure 7 It is a schematic diagram of the exploded structure of the mold core assembly of the present invention;

[0024] Figure 8 It is a schematic diagram of the exploded structure of the slide assembly of the present invention;

[0025] Fig. 9 It is a schematic diagram of the panel structure of the present invention;

[0026] Fig.10 This is a structural view of the air guide plate of the present invention;

[0027] Fig.11 It is a schematic diagram of the structure of the upper pressing plate of the present invention;

[0028] Fig.12 It is a schematic diagram of the structure of the lower pressing plate of the present invention;

[0029] Fig.13 It is a schematic diagram of the decomposed structure of the panel of the present invention. DETAILED DESCRIPTION

[0030] To further illustrate the technical means and technical effects of the present invention, the preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1-13 As shown, a sheet forming mold includes an upper mold and a lower mold. The upper mold includes a panel 1 and an air guide plate 2, and the panel 1 and the air guide plate 2 are fixedly connected by screws. An air inlet 101 is provided in the panel 1. When working, high-pressure gas enters the interior of the mold from the air inlet 101. An air outlet groove 102 is provided on the lower surface of the panel 1, and the air inlet 101 is connected to the air outlet groove 102. The air guide plate 2 is provided with an array of third through holes 201 that penetrate the upper and lower surfaces of the air guide plate 2 at positions corresponding to the air outlet groove 102. In order to prevent leakage of high-pressure gas, two annular grooves are provided on the outer side of the third through hole 201, and a sealing ring 202 is fixed in the groove, and the interfaces of the two sealing rings 202 are not in the same direction.

[0032] The lower die includes a sheet positioning device 3, a core assembly 4, a lower die pad 5 and a bottom plate 6. The sheet positioning device 3 includes an upper pressing plate 31 and a lower pressing plate 32, and the lower pressing plate 32 is fixedly connected to the lower die pad 5 by screws. One end of the upper pressing plate 31 and one end of the lower pressing plate 32 are hinged together, and the other ends of the hinged ends of the upper pressing plate 31 and the lower pressing plate 32 are detachably snap-connected. A groove 321 is provided in the middle of the lower pressing plate 32, and a second through hole 322 is provided at the bottom of the groove 321. During 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 during the processing, a first positioning device is fixedly provided on the lower pressing plate 32, and a second positioning device adapted to the first positioning device is fixedly provided on the upper pressing plate 31. The first positioning device includes two annular positioning protrusions 323 arranged on the outer sides of the groove 321 and first positioning columns 324 respectively arranged on the outer sides of the four corners of the positioning protrusions 323; wherein the height of the first positioning protrusion 3231 close to the groove 321 is less than the height of the second positioning protrusion 3232 close to the first positioning column 324. The second positioning device includes first positioning holes 311 respectively adapted to the four first positioning columns 324 and two annular positioning grooves 312 respectively adapted to the first positioning protrusions 3231 and the second positioning protrusions 3232. In order to facilitate the accurate closing and positioning of the upper pressing plate 31 and the lower pressing plate 32, conical positioning columns 325 are respectively fixed on the four sides of the upper surface of the lower pressing plate 32, and conical positioning holes 313 adapted to the conical positioning columns 325 are provided at the corresponding positions of the upper pressing plate 31 and the conical positioning columns 325. In order to facilitate operation, the side of the detachable end of the upper pressing plate 31 is fixedly provided with a first handle 314, and the side of the first handle 314 is fixedly provided with a clamping block 315. A second handle 326 is fixedly provided on the detachable end side of the lower pressing plate 32, and a buckle 327 adapted to the clamping block 315 is fixedly provided on the second handle 326. The core assembly 4 includes a cylinder 401, a shovel 402 and a slide assembly 403. The cylinder 401 is fixedly connected to the lower die pad 5 through a cylinder connecting block 404, and the shovel 402 is fixedly connected to the cylinder piston 406 through a shovel seat 405. A T-shaped connecting ear 407 is provided on the shovel 402, and a first inclined surface 408 is provided on the upper surface of the T-shaped connecting ear 407. A T-shaped slot 409 is provided on the lower surface of the slide assembly 403, and a second inclined surface 410 adapted to the first inclined surface 408 is provided in the T-shaped slot 409, and the T-shaped connecting ear 407 is slidably connected to the T-shaped slot 409. The lower die pad 5 is provided with a first through hole 51 adapted to the slide assembly 403, and the slide assembly 403 is limitedly connected to the side wall of the first through hole 51. The bottom plate 6 is fixedly connected to the bottom surface of the lower die pad 5 by screws, and the upper surface of the bottom plate 6 is slidably connected to the lower surface of the shovel 402.

[0033] During assembly, the oil cylinder 401 is connected to the external control system and then fixed on the lower die pad 5, so that the shovel 402 is fixed relative to the lower die pad 5, the lower pressure plate 32 is fixedly connected to the upper surface of the lower die pad 5, so that the positions of the second through hole 322 and the first through hole 51 correspond to each other, the bottom plate 6 is fixedly connected to the lower surface of the lower die pad 5 by screws, and the slide assembly 403 is arranged in the first through hole 51 and is slidably connected to the shovel 402. During operation, the oil cylinder 401 drives the oil cylinder piston 406 to move, driving the shovel 402 to move in the direction of movement of the oil cylinder piston 406. Under the action of the inclined sliding cooperation 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 will move in a direction perpendicular to the movement direction of the oil cylinder piston 406 and pass through the second through hole 322. The relative movement speed and time period of the slide assembly 403 can be controlled by controlling the movement speed and time period of the oil cylinder piston 406.

[0034] In another embodiment, in order to effectively discharge the trapped air generated during hot pressing, on the basis of the above-mentioned mold structure, the slide assembly 403 includes a 3D metal printed exhaust insert 411, a mold core 412 and a slide 413, the upper surface of the mold core 412 is provided with a first placement groove 414, the exhaust insert 411 is fixed in the first placement groove 414 by screws, and the thickness of the exhaust insert 411 is greater than or equal to the depth of the first placement groove 414; a boss 415 is provided in the middle of the lower surface of the mold core 412, and a first limiting step 416 is provided around the boss 415; a second placement groove 417 adapted to the boss 415 is provided in the middle of the upper surface of the slide 413, the depth of the second placement groove 417 is less than or equal to the height of the boss 415, and second limiting steps 418 are provided around the side of the second placement groove 417; the boss 415 on the lower surface of the mold core 412 is fixedly arranged in the second placement groove 417, and the first limiting step 416 is fixedly connected to the second limiting step 417. The exhaust insert 411 is provided with an air-permeable layer 419, and many air holes are provided in the air-permeable layer 419, and the air-permeable layer 419 is arranged on the side close to the upper mold; a first exhaust channel 420 is provided in the exhaust insert 411, a second exhaust channel 421 is provided in the mold core 412, and the second exhaust channel 421 runs through the upper and lower surfaces of the mold core 412, and a third exhaust channel 422 is provided in the slide 413; one end of the first exhaust channel 420 is connected to the air-permeable layer 419, and the other end is connected to one end of the second exhaust channel 421, the other end of the second exhaust channel 421 is connected to one end of the third exhaust channel 422, and the other end of the third exhaust channel 422 is connected to the outside of the slide assembly 403.

[0035] In another embodiment, in order to reduce wear and increase the service life of the mold, on the basis of the above-mentioned mold structure, a first wear-resistant block 7 is provided at the connection between the base plate 6 and the shovel 402, a second wear-resistant block 8 is fixedly provided 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 provided on the second inclined surface 410, and a fourth wear-resistant block 10 is provided on the four surfaces of the slide 413 that cooperate 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 all nitrided to form a nitride layer.

[0036] In another embodiment, in order to keep the mold in a constant temperature state at all times to obtain a higher processing yield, the sheet forming mold also includes a heating device, which includes a temperature control box, a heating rod 11 and a temperature sensing line 12, and the heating rod 11 and the temperature sensing line 12 are electrically connected to the temperature control box respectively; the panel 1, the upper pressing plate 31, the lower pressing plate 32, the position 413, the lower mold pad 5 and the bottom plate 6 are respectively provided with heating rod mounting holes, and the heating rod 11 is respectively fixed in the mounting holes; the panel 1, the upper pressing plate 31, the lower pressing plate 32, the position 413, the lower mold pad 5 and the bottom plate 6 are respectively provided with temperature sensing line grooves 13, and the temperature sensing line 12 is respectively arranged in the temperature sensing line grooves 13 and fixed by screws through the pressing plate 14. According to continuous practice, when the mold temperature is controlled at 150°C, the yield of the sheet is the highest, so the heating temperature of the heating rod 11 is set at 150°C.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A sheet forming mold, comprising an upper mold and a lower mold, characterized in that: The lower die comprises a lower die pad, a die core assembly and a sheet positioning device, and the lower die pad is fixedly connected to the sheet positioning device; The core assembly includes an oil cylinder, a shovel and a slide assembly, the oil cylinder is fixedly connected to the lower die pad through an oil cylinder connecting block, the shovel is fixedly connected to the oil cylinder piston, and the slide assembly is arranged above the shovel and is connected to the shovel through an inclined sliding surface; The lower die pad is provided with a first through hole adapted to the slide assembly, the slide assembly is limitedly connected to the side wall of the first through hole, the lower surface of the sheet positioning device is provided with a second through hole, and the slide assembly is gap-matched with the second through hole; When the oil cylinder drives the shovel to move along the moving direction of the oil cylinder piston, under the action of the shovel and the first through hole, the sliding assembly moves in a direction perpendicular to the moving direction of the shovel and can pass through the second through hole; The shovel is provided with a T-shaped connecting ear, the T-shaped connecting ear is provided with a first inclined surface, the lower surface of the slide assembly is provided with a T-shaped slot adapted to the T-shaped connecting ear, the T-shaped slot is provided with a second inclined surface, the first inclined surface is connected to the second inclined surface, and the T-shaped connecting ear is slidably connected to the T-shaped slot; 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 to the opposite end of the hinged end of the lower pressing plate, a groove is provided in the middle of the bottom surface of the lower pressing plate, and the second through hole is provided in the groove; A first positioning device is provided on the matching surface of the lower pressing plate and the upper pressing plate, and a second positioning device is provided at a position of the upper pressing plate corresponding to the first positioning device; The upper pressing plate is provided with a first handle, and the lower pressing plate is provided with a second handle.

2. The sheet forming mold according to claim 1, characterized in that: 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 to the exhaust insert and the slide respectively; The exhaust insert includes a breathable layer, which is arranged on a side close to the upper mold. A first exhaust channel is provided in the exhaust insert, a second exhaust channel is provided in the mold core, and a third exhaust channel is provided in the slide. One end of the first exhaust channel is connected to the breathable layer, and the other end is connected to one end of the second exhaust channel. The other end of the second exhaust channel is connected to one end of the third exhaust channel, and the other end of the third exhaust channel is connected to the outside of the slide assembly.

3. The sheet forming mold according to claim 2, characterized in that: The upper mold includes a panel and an air guide plate, the panel is fixedly connected to the air guide plate, the panel is provided with an air inlet hole and an air outlet groove connected to the air inlet hole, and the middle array of the air guide plate is provided with a third through hole connected to the air outlet groove.

4. The sheet forming die according to claim 3, characterized in that: The lower mold also includes a bottom plate, the upper surface of the bottom plate is fixedly connected to the lower surface of the lower mold pad, the bottom surface of the shovel is slidably connected to the upper surface of the bottom plate, a first wear-resistant block is provided at the connection between the bottom plate and the shovel, and a second wear-resistant block is provided at the corresponding position of the bottom surface of the shovel and the first wear-resistant block.

5. The sheet forming die according to claim 4, characterized in that: A third wear-resistant block is disposed on the second inclined surface, and a fourth wear-resistant block is disposed on the four surfaces of the slide that cooperate with the first through hole.

6. The sheet forming die according to claim 5, characterized in that: It also includes a heating device, which includes a temperature control box, a heating rod and a temperature sensing wire, and the heating rod and the temperature sensing wire are electrically connected to the temperature control box respectively; The heating rod and the temperature sensing wire are fixedly arranged on the panel, the sheet positioning device, the slide, the lower die pad and the bottom plate respectively.

7. The sheet forming die according to claim 6, wherein: The first positioning device includes an annular positioning protrusion arranged outside the groove and positioning columns respectively arranged outside the four corners of the positioning protrusion; The second positioning device includes a positioning hole arranged at a position corresponding to the positioning column and a positioning groove arranged at a position corresponding to the positioning protrusion, the positioning hole is adapted to the positioning column, and the positioning groove is adapted to the positioning protrusion.

8. The sheet forming die according to claim 7, wherein: The positioning protrusion includes a first positioning protrusion and a second positioning protrusion arranged outside the first positioning protrusion, and the height of the first positioning protrusion is smaller than the height of the second positioning protrusion.

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