Aluminum sheet hot compound bottom die structure

Abstract

The utility model discloses an aluminum sheet hot compound bottom die structure which comprises an upper die, a material returning plate, a lower die, a material sheet positioning plate and a lifting mechanism. The center of the bottom of the upper die extends downwards to form a male die, the male die is sleeved with the stripper plate, the upper end of the lifting mechanism is fixed to the upper die, and the lower end of the lifting mechanism is connected with the stripper plate and drives the stripper plate to vertically slide along the male die. The center of the upper side of the lower die extends upwards to form a die surface, and the material sheet positioning plate is detachably arranged on the periphery of the die surface in a sleeving manner; the inner side of the material sheet positioning plate is sunken to form a circle of first annular groove position, the lower side face of the first annular groove position is flush with the die surface, and the outer side of the first annular groove position is an arc-shaped side wall; and the male die and the die surface are coaxially arranged. The die is simple in structure, has a material sealing effect, can effectively prevent various sizes with different diameters after a material sheet is hit, does not need to correct the diameter of the material sheet through rounding, and ensures the concentricity of the material sheet and a bottom sheet; products can be guaranteed not to be eccentric, machining precision is guaranteed, and continuous production of the products can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece processing molds, in particular to an aluminum sheet hot bottom composite mold structure. Background Art

[0002] The bottom types of aluminum products are mainly divided into single bottom, cold composite bottom, and hot composite bottom. Some special ones are hot melt shot bottom. This structure is mainly used in hot composite bottom products, especially imitation die casting series products, which optimizes the molding process of hot composite bottom imitation die casting products. The existing original process is to heat the bottom after the pot body is formed. Since the change of aluminum in the furnace is relatively large, the change of aluminum sheet in the furnace is smaller than that of the pot body, so the hot composite bottom of aluminum sheet has advantages for stretching and imitation die casting products, which greatly improves the product quality. The existing mold structure has many accessories and complex assembly. The aluminum sheet will become very soft after heating. After the impact, the diameter of the aluminum sheet will increase by 3-6mm. For the imitation die casting exposed aluminum products, the rounding process needs to be performed, otherwise the molded product will cause the bottom sheet to have different sizes due to the different sizes of the aluminum sheets, and the bottom sheet and the aluminum sheet cannot be 100% concentric after rounding, and there will be an eccentricity of 0.5mm-1.0mm. In addition, the thickness of the aluminum sheet will also be thinned, which has a greater impact on the hot composite bottom imitation die casting products. Utility Model Content

[0003] The utility model aims to overcome the above-mentioned deficiencies of the prior art and provide an aluminum sheet thermal bottom compounding mold structure.

[0004] The utility model is realized through the following technical scheme: an aluminum sheet hot-bottom compound mold structure, comprising an upper mold, a stripping plate, a lower mold, a sheet positioning plate and a lifting mechanism with a lifting function; the center of the bottom of the upper mold extends downward to form a convex mold, the stripping plate has a through hole and is sleeved on the outer periphery of the convex mold through the through hole, the upper end of the lifting mechanism is fixed on the upper mold, the lower end of the lifting mechanism is connected with the stripping plate and drives the stripping plate to slide up and down along the convex mold; the center of the upper side of the lower mold extends upward to form a mold surface, and the sheet positioning plate is detachably sleeved on the outer periphery of the mold surface; the inner side of the sheet positioning plate is recessed to form a circle of first annular grooves, the lower side surface of the first annular groove is flush with the mold surface, and the outer side of the first annular groove is a side wall with an arc shape; the convex mold is coaxially arranged with the mold surface; during the downward pressing process of the upper mold, the stripping plate sinks and presses against the sheet positioning plate, and during the rising process of the upper mold, the stripping plate gradually separates from the sheet positioning plate.

[0005] The coaxial setting of the punch and the die surface can ensure that the center of the aluminum sheet is located on the axis of the punch coaxial center, and can be accurately positioned to ensure that the edges of the aluminum sheet and the bottom sheet are evenly flush during the production process, without high and low edges, and without being too thick or too thin. The setting of the lifting mechanism can enable the stripping plate and the punch to slide relative to each other, thereby realizing the stripping function. The setting of the first annular groove can constrain the edges of the bottom sheet and the aluminum sheet. The square box aluminum sheet extends outward after being hit, and also realizes the sealing operation of the thermal composite process.

[0006] The outer circumference of the sheet positioning plate bulges upward to form a circle of annular protrusions, and the annular protrusions and the upper side of the sheet positioning plate form an L-shaped positioning stop; the outer circumference of the bottom of the stripper plate is recessed upward to form a circle of second annular grooves, and during the pressing process of the stripper plate, the lower side of the stripper plate is embedded in the positioning stop, and the annular protrusion is embedded in the second annular groove. The lower side of the stripper plate is embedded in the positioning stop, and the annular protrusion is embedded in the second annular groove, and the cooperation of the two can align the upper mold and the lower mold.

[0007] The upper circumference of the mold surface is provided with a third annular groove, and the sheet positioning plate is detachably sleeved in the third annular groove, and the lower side of the sheet positioning plate presses against the lower side of the third annular groove. The third annular groove can position the sheet positioning plate and prevent it from sliding.

[0008] The sheet positioning plate is fixed to the outer side wall of the mold surface by bolts.

[0009] The lifting mechanism includes a guide rod, a positioning nut and a spring; the stripping plate is provided with a through hole and a guide hole connected thereto, and the through hole and the guide hole together penetrate the upper and lower sides of the stripping plate; the upper end of the guide rod is mounted on the upper die, and the lower end thereof is located in the guide hole after passing through the through hole and is tightened with the positioning nut, the positioning nut is located in the guide hole, and the diameter of the positioning nut is larger than the aperture of the through hole; the spring is sleeved on the outer periphery of the guide rod, the upper end of the spring presses against the lower side of the upper die, and the lower end of the spring presses against the side of the stripping plate. The setting of the spring can maintain the tension between the upper die and the stripper plate; the setting of the positioning nut restricts the range of movement of the stripper plate; in normal state, the spring pushes the stripper plate downward, so that the lower side of the stripper plate is lower than the height of the lower side of the punch; during thermal bonding, due to the action of the sheet positioning plate and the stripper plate, the punch can slide downward along the through hole in the stripper plate to complete the thermal bonding operation. As the upper die rises, the stripper plate gradually returns to its original position, and the upper die will rise with the aluminum sheet adhered to it. At this time, the stripper plate can scrape the aluminum sheet off and drop it on the die surface.

[0010] There are a plurality of lifting mechanisms, which are evenly distributed around the punch; the number of through holes matches the number of lifting mechanisms, which are evenly distributed on the stripper plate. There are a plurality of lifting mechanisms, which can uniformly operate the stripper plate, making its lifting speed uniform and its force uniform.

[0011] The stripping plate is a circular ring structure.

[0012] The outer diameter of the first annular groove is larger than the diameter of the punch, and the outer diameter of the first annular groove is larger than the diameter of the through hole of the stripping plate, so that the lower side of the stripping plate can scrape off the aluminum sheet when stripping.

[0013] The sheet positioning plate is an annular structure with a through hole.

[0014] Compared with the prior art, the advantages of the utility model are: the mold has a simple structure, fewer production processes, has the function of sealing the material, can effectively prevent the material from having various diameters after being hit, does not need to correct the diameter of the material by rounding, and ensures the concentricity of the material and the base film; the mold is composite, the mold structure is optimized, the mold development is reduced, the mold cost is saved, and the production efficiency is improved; it can ensure that the product is not eccentric, ensure the processing accuracy, and enable the product to achieve continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0016] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0017] The meanings of the reference numerals in the figure are as follows: 1. upper die; 2. material stripping plate; 21. second annular groove; 22. through hole; 23. guide hole; 3. lower die; 4. sheet positioning plate; 41. first annular groove; 42. annular protrusion; 43. positioning stop; 5. punch; 6. die surface; 61. third annular groove; 71. guide rod; 72. positioning nut; 73. spring. DETAILED DESCRIPTION

[0018] The content of the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Example

[0020] See also Figure 1 to Figure 2The present invention relates to a hot-bottomed aluminum sheet mold structure, comprising an upper mold 1, a stripping plate 2, a lower mold 3, a sheet positioning plate 4 and a lifting mechanism with a lifting function; the center of the bottom of the upper mold 1 extends downward to form a punch 5, the stripping plate 2 has a through hole and is sleeved on the outer periphery of the punch 5 through the through hole, the upper end of the lifting mechanism is fixed on the upper mold 1, and the lower end of the lifting mechanism is connected with the stripping plate 2 and drives the stripping plate 2 to slide up and down along the punch 5; the center of the upper side of the lower mold 3 extends upward to form a mold surface 6, and the sheet positioning plate 4 is detachably sleeved on the outer periphery of the mold surface 6; the inner side of the sheet positioning plate 4 is recessed to form a circle of first annular grooves 41, the lower side surface of the first annular groove 41 is flush with the mold surface 6, and the outer side of the first annular groove 41 is a circular arc-shaped side wall; the punch 5 is coaxially arranged with the mold surface 6; during the downward pressing process of the upper mold 1, the stripping plate 2 sinks and presses against the sheet positioning plate 4, and during the rising process of the upper mold 1, the stripping plate 2 gradually separates from the sheet positioning plate 4.

[0021] The punch 5 and the die surface 6 are coaxially arranged to ensure that the center of the aluminum sheet is located on the coaxial axis of the punch 5, and can be accurately positioned to ensure that the edges of the aluminum sheet and the bottom sheet are evenly flush during the production process, without high and low edges, and without being too thick or too thin. The setting of the lifting mechanism allows the stripping plate 2 and the punch 5 to slide relative to each other, thereby realizing the stripping function. The setting of the first annular groove 41 can constrain the edges of the bottom sheet and the aluminum sheet, and the square box aluminum sheet extends outward after being hit, which also realizes the sealing operation of the thermal composite process.

[0022] The outer circumference of the sheet positioning plate 4 is raised upward to form a circle of annular protrusions 42, and the annular protrusions 42 and the upper side of the sheet positioning plate 4 form an L-shaped positioning stop 43; the outer circumference of the bottom of the stripping plate 2 is recessed upward to form a circle of second annular grooves 21. During the pressing process of the stripping plate 2, the lower side of the stripping plate 2 is embedded in the positioning stop 43, and the annular protrusions 42 are embedded in the second annular groove 21. The lower side of the stripping plate 2 is embedded in the positioning stop 43, and the annular protrusions 42 are embedded in the second annular groove 21. The cooperation of the two can align the upper mold 1 and the lower mold 3. In this embodiment, through the setting of the positioning stop 43, it has the functions of positioning and limiting, ensuring stability and accuracy during assembly and use, and also facilitating assembly. When designing the stopper, the mating surface should have a demoulding slope greater than 3 to 5°, and the end should be chamfered or rounded. These designs are beneficial to the assembly process and improve production efficiency. In product design, the stopper design not only improves the stability and appearance quality of the product, but also facilitates the assembly process and prevents potential interference problems.

[0023] A third annular groove 61 is formed on the outer circumference of the upper section of the mold surface 6, and the sheet positioning plate 4 is detachably sleeved in the third annular groove 61, and the lower side of the sheet positioning plate 4 presses against the lower side of the third annular groove 61. The third annular groove 61 can position the sheet positioning plate 4 to prevent it from sliding.

[0024] The blank positioning plate 4 is fixed to the outer side wall of the mold surface 6 by bolts.

[0025] The lifting mechanism includes a guide rod 71, a positioning nut 72 and a spring 73; the stripping plate 2 is provided with a through hole 22 and a guide hole 23 connected thereto, and the through hole 22 and the guide hole 23 together penetrate the upper and lower sides of the stripping plate 2; the upper end of the guide rod 71 is mounted on the upper mold 1, and its lower end is located in the guide hole 23 after passing through the through hole 22 and is tightened with a positioning nut 72, and the positioning nut 72 is located in the guide hole 23, and the diameter of the positioning nut 72 is larger than the aperture of the through hole 22; the spring 73 is sleeved on the outer periphery of the guide rod 71, and the upper end of the spring 73 presses against the lower side of the upper mold 1, and the lower end of the spring 73 presses against the upper side of the stripping plate 2. The setting of spring 73 can maintain tension between the upper mold 1 and the stripping plate 2; the setting of positioning nut 72 restricts the range of movement of the stripping plate 2; in normal state, spring 73 pushes the stripping plate 2 downward, so that the lower side of the stripping plate 2 is lower than the height of the lower side of the punch 5; during thermal bonding, due to the action of the sheet positioning plate 4 and the stripping plate 2, the punch 5 can slide downward along the through hole in the stripping plate 2 to complete the thermal bonding operation. As the upper mold 1 rises, the stripping plate 2 gradually returns to its original position, and the upper mold 1 will rise with the aluminum sheet adhered to it. At this time, the stripping plate 2 can scrape the aluminum sheet off and drop it on the mold surface 6.

[0026] There are several lifting mechanisms, which are evenly distributed around the punch 5; the number of through holes 22 matches the number of lifting mechanisms, and the through holes 22 are evenly distributed on the stripper plate 2. There are multiple lifting mechanisms, which can uniformly operate the stripper plate 2, making its lifting speed uniform and the force uniform.

[0027] The stripper plate 2 is a circular ring structure.

[0028] The outer diameter of the first annular groove 41 is larger than the diameter of the punch 5 , and the outer diameter of the first annular groove 41 is larger than the diameter of the through hole of the stripping plate 2 , so that the lower side of the stripping plate 2 can scrape off the aluminum sheet when stripping.

[0029] The sheet positioning plate 4 is an annular structure with a through hole.

[0030] The operation steps of this embodiment are as follows:

[0031] 1) The aluminum sheet and the bottom sheet are riveted together in a heating furnace.

[0032] 2) After the aluminum sheet and the negative film are heated in the tunnel furnace, the employee clamps the edge of the negative film with a clip, places it in the center of the mold structure, and presses the striking button.

[0033] 3) The upper mold 1 strikes downward, and the bottom sheet and the aluminum sheet surface are combined by instantaneous friction.

[0034] 4) After the striking, the aluminum sheet may stick to the upper mold 1. During the rising process of the upper mold 1, the aluminum sheet is scraped off by the stripper plate 2 and falls on the mold surface 6 of the lower mold 3.

[0035] 5) The employee uses a suction cup to hold the film surface, removes it from the mold and cools it with water.

[0036] The product of this embodiment can also be verified as follows:

[0037] 1) Passed the thermal shock test, 400 degrees Celsius dry-burning 5 times.

[0038] 2) Tensile test: The tensile test requires more than 100N for stretching, and more than 120N for die casting.

[0039] The advantages of this embodiment are:

[0040] 1) This mold structure has a sealing function, that is, the positioning stop 43 on the sheet positioning plate 4, combined with the data of the concave and convex mold 5, can effectively prevent the sheet from having various diameters after being hit, without having to correct the sheet diameter by rounding, thereby ensuring the concentricity of the sheet and the film.

[0041] 2) The mold structure of this embodiment is simple. The mold processing method is simple. The existing original mold structure requires wire cutting processing, and various auxiliary fixtures need to be completed by wire cutting. The new mold structure of this application only needs lathe processing, mainly the main body upper mold 1 and lower mold 3.

[0042] The above detailed description is a specific description of a feasible embodiment of the utility model. The embodiment is not intended to limit the patent scope of the utility model. Any equivalent implementation or modification that does not deviate from the utility model should be included in the patent scope of this case.

Claims

1. An aluminum sheet hot bottom mold structure, characterized in that: The cam is provided with a plurality of cams, and the cam is provided with a plurality of cams, and the cams are provided with a plurality of cams, and the cams are provided with a plurality of cams.

2. The aluminum sheet thermal bottoming mold structure according to claim 1 is characterized in that: The outer circumference of the sheet positioning plate protrudes upward to form a circle of annular protrusions, and the annular protrusion and the upper side of the sheet positioning plate form an L-shaped positioning stop; the outer circumference of the bottom of the stripping plate is recessed upward to form a circle of second annular grooves, and during the downward pressing process of the stripping plate, the lower side of the stripping plate is embedded in the positioning stop, and the annular protrusion is embedded in the second annular groove.

3. The aluminum sheet thermal bottoming mold structure according to claim 1 is characterized in that: A circle of third annular grooves is provided on the outer circumference of the upper section of the mold surface, and the sheet positioning plate is detachably sleeved in the third annular groove, and the lower side of the sheet positioning plate presses against the lower side surface of the third annular groove.

4. The aluminum sheet thermal bottoming mold structure according to claim 3 is characterized in that: The sheet positioning plate is fixed to the outer side wall of the mold surface by bolts.

5. The aluminum sheet thermal bottoming mold structure according to claim 1, characterized in that: The lifting mechanism includes a guide rod, a positioning nut and a spring; the stripping plate is provided with a through hole and a guide hole connected thereto, and the through hole and the guide hole together penetrate the upper and lower sides of the stripping plate; the upper end of the guide rod is mounted on the upper die, and the lower end thereof is located in the guide hole after passing through the through hole and is tightened with the positioning nut, the positioning nut is located in the guide hole, and the diameter of the positioning nut is larger than the aperture of the through hole; the spring is sleeved on the outer periphery of the guide rod, the upper end of the spring presses against the lower side of the upper die, and the lower end of the spring presses against the side of the stripping plate.

6. The aluminum sheet thermal bottom-reinforced mold structure according to claim 5, characterized in that: There are a plurality of lifting mechanisms, which are evenly distributed around the punch; the number of the through holes matches the number of the lifting mechanisms, which are evenly distributed on the stripping plate.

7. The aluminum sheet thermal bottom-reinforced mold structure according to claim 1, characterized in that: The stripping plate is a circular ring structure.

8. The aluminum sheet thermal bottom-reinforced mold structure according to claim 1, characterized in that: The outer diameter of the first annular groove is greater than the diameter of the punch, and the outer diameter of the first annular groove is greater than the diameter of the stripper plate through hole.

9. The aluminum sheet thermal bottom-reinforced mold structure according to claim 1, characterized in that: The sheet positioning plate is an annular structure with a through hole.

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