Compression stretching die
By designing a combined structure of male and female molds, the problems of high equipment cost, uneven molding, and difficult demolding in the molding of thin-walled long circumferential wall products were solved, achieving efficient and precise molding and rapid demolding.
Patent Information
- Application Number
- CN202520288075.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-23
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-02-23
AI Technical Summary
When traditional molds are used to form products with thin walls and long circumferences, there are problems such as high equipment costs, complex processes, uneven molding, difficulty in demolding, and inaccurate sheet metal positioning.
A pressing die was designed, including a male die and a female die. The length of the male die exceeds the circumference of the product. It is equipped with an ejector rod, a pressure ring, and air holes. Combined with a guide post and guide sleeve structure, it can achieve one-time molding of the product, precise positioning, and rapid demolding.
It enables efficient one-time molding of thin-walled, long-circumferential-walled products, improves molding quality and mold utilization efficiency, and ensures uniform product wall thickness and rapid demolding.
Smart Images
Figure CN223748337U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of mould, specifically discloses a kind of compression stretch mould for thin-walled and longer circumferential wall product processing. BACKGROUND
[0002] As the core component in product forming process, the mould determines the process complexity of product processing and the quality of final formed product.
[0003] Traditional thin-walled and longer circumferential wall product (see attached Figure 2 ) forming processing generally adopts hierarchical stretching, which needs two sets of mould forming, not only leading to higher equipment and mould cost, but also complex process and low processing efficiency. Currently, there are also one set of mould direct compression molding in the same industry to prepare thin-walled and longer circumferential wall product, but due to the defects and deficiencies in mould design, on the one hand, it will lead to the uneven control of the wall thickness of the formed product; on the second hand, due to the longer circumferential wall of the product, the contact area between the inner wall of the formed product and the outer wall of the male die is large, which cannot make the formed product demould quickly; on the third hand, the sheet metal before compression stretching cannot be effectively positioned, which leads to the sheet metal being unable to be compressed and stretched into the mould wall according to the preset mode under the extrusion of the concave-convex die, thereby affecting the quality of the final formed product. Based on this, the present application proposes a compression stretch mould to solve the problems and deficiencies existing in the one-time compression stretch molding process of the existing thin-walled and longer circumferential wall product. CONTENT OF UTILITY MODEL
[0004] The utility model aims at providing a kind of compression stretch mould for thin-walled and longer circumferential wall product processing to solve the deficiencies existing in the process of forming processing of the existing mould for thin-walled and longer circumferential wall product.
[0005] The utility model is realized by the following technical solutions:
[0006] A compression stretch mould, comprising a lower die plate and an upper die plate, a male die and a female die are respectively arranged on the lower die plate and the upper die plate in alignment, the male die is in cylindrical shape, and the effective height of the male die in the forming process is greater than the length of the circumferential wall of the product, a cylindrical straight groove is arranged on the lower surface of the female die, which is axially aligned with the male die and has a diameter greater than the diameter of the male die, a plurality of vertical material ejecting rods are arranged around the male die, the top of the plurality of material ejecting rods is connected to a blank holder, which is sleeved on the outer cylindrical surface of the male die, and an annular positioning groove is arranged on the upper surface of the blank holder.
[0007] As a further arrangement of the above-mentioned scheme, a gas hole is arranged in the male die, the upper end of the gas hole is communicated to the top surface of the male die, and the lower end of the gas hole is communicated to a gas inlet.
[0008] As a further arrangement of the above-mentioned scheme, the top of the cylindrical straight slot is provided with a discharging block, and a material returning rod connected with the discharging block is arranged through the upper die plate.
[0009] As a further arrangement of the above-mentioned scheme, the upper surface of the lower die plate is fixedly provided with a male die fixed plate, and a stepped pressing hole is arranged at the center of the male die fixed plate, and the lower end of the male die is fixedly arranged on the lower die plate through the stepped pressing hole.
[0010] As a further arrangement of the above-mentioned scheme, the upper surface of the lower die plate is fixedly provided with a guide column, and the lower surface of the upper die plate is fixedly provided with a guide sleeve, and the guide column and the guide sleeve are arranged in axial alignment.
[0011] Compared with the prior art, the utility model has the advantages of the following beneficial effects:
[0012] 1. The compression stretch die in the patent can realize automatic repair of the circumferential wall of the formed product in the process of cooperating with the cylindrical straight slot in the female die, effectively improves the quality of the formed product, and improves the service efficiency and service life of the die.
[0013] 2. The compression stretch die in the patent can better realize auxiliary forming through the design of the edge ring, improve the quality of the product, and combine the positioning effect of the annular positioning groove on the sheet metal before forming to accurately position the parts and reliably form the quality.
[0014] 3. The patent further provides the gas hole and the gas inlet on the male die, can separate the formed product from the male die by injecting high-pressure air after forming, and realizes rapid discharging of the product under the action of the material returning rod and the discharging block, so that the material returning process in the whole product processing process is very fast and effective. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.
[0016] Figure 1 It is a plane structure schematic view of the utility model;
[0017] Figure 2 It is a plane structure schematic view of the product after forming in the utility model. DETAILED DESCRIPTION
[0018] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of the present application.
[0019] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments. Figures 1-2 The present application will be described in detail below with reference to the drawings and in combination with the embodiments.
[0020] Embodiment 1
[0021] Embodiment 1 discloses a compression stretching mold, referring to the drawings Figure 1 , including a lower mold plate 1 and an upper mold plate 2, a male mold fixed plate 5 is fixedly installed on the upper surface of the lower mold plate 1 through round pin columns 3 and internal hexagonal screws 4, a stepped compression hole is formed in the center of the male mold fixed plate 5, and a male mold 6 vertically upwardly protruding from the male mold fixed plate 5 is fixedly arranged in the stepped compression hole of the male mold fixed plate 5. The male mold 6 is in a cylindrical shape, and the effective height of the male mold 6 during the forming process is greater than the circumferential wall length of the product. At the same time, an air hole 601 is formed in the male mold 6 along the axial direction, the upper end of the air hole 601 is communicated to the top surface of the male mold 6, and the lower end is connected to an external compressed air source through a radial air inlet 602.
[0022] A plurality of vertically arranged material ejection rods 7 are arranged around the male mold 6, and the lower ends of the material ejection rods 7 are arranged to be able to be raised and lowered through the male mold fixed plate 5 and the lower mold plate 1, so that the lower ends can be connected to a material ejector. A pressing ring 8 is connected to the top of the plurality of material ejection rods 7, and the pressing ring 8 is sleeved on the outer cylindrical surface of the male mold 6. Then, an annular positioning groove 801 is formed on the upper surface of the pressing ring 8, so that the size of the annular positioning groove 801 is slightly larger than the size of the raw material sheet metal to be formed, so that the raw material sheet metal can be positioned and limited by the annular positioning groove 801 when placed on the pressing ring 8.
[0023] Similarly, a female mold 9 is fixedly installed on the lower surface of the upper mold plate 2 through round pin columns 3 and internal hexagonal screws 4, a cylindrical straight groove 901 is arranged at the center of the lower surface of the female mold 9, which is axially aligned with the male mold 6, the hole diameter of the cylindrical straight groove 901 is slightly larger than the diameter of the male mold 6, so that after the male mold 6 is inserted into the cylindrical straight groove 901, a uniform and equal-thickness forming annular gap can be formed between the two. In addition, a material ejection rod 10 is arranged through the upper surface of the upper mold plate 2 directly above the female mold 9, and a material discharging block 11 is connected to the lower end of the material ejection rod 10 extending into the cylindrical straight groove 901, and the lower surface of the material discharging block is matched with the top shape of the male mold 6.
[0024] Finally, the guide column 12 is fixed on the upper surface of the lower die plate 1, the guide sleeve 13 is fixed on the lower surface of the upper die plate 2, and the guide column 12 and the guide sleeve 13 are arranged in axial alignment, so that the entire stretching die can be precisely moved up and down through the guiding action between the guide column 12 and the guide sleeve 13 during the closing process.
[0025] The processing steps and working principle of the stretching die disclosed in the embodiment 1 during the processing process are as follows:
[0026] Firstly, the raw material sheet metal to be formed is placed in the annular positioning groove 801 on the edge ring 8, and the raw material sheet metal is precisely positioned before processing through the annular positioning groove 801.
[0027] Then, the edge ring 8 is pushed upward by the ejector rod 7 until the upper surface of the edge ring 8 contacts the lower surface of the female die 9, at which time the raw material sheet metal can be tightly fixed through the pressing action of the female die 9. Subsequently, the entire lower die plate 1 and the male die 6 are pushed upward, or the upper die plate 2 and the female die 9 are pushed downward, so that the male die 6 presses the center of the raw material sheet metal into the cylindrical straight groove 901 until the entire raw material sheet metal is stretched into the forming annular gap, and then the male die 6 is further pushed upward by a certain distance. In this process, due to the action between the outer wall of the male die 6 and the inner wall of the cylindrical straight groove 901, the wall thickness of the formed workpiece can be automatically repaired, so that the wall thickness of the formed product is consistent with the thickness of the forming annular gap.
[0028] After the workpiece is formed, the die plate 1 and the male die 6 are controlled to move downward, and at the same time, high-pressure air is injected into the air hole 601, so that the workpiece is separated from the male die 6. After separation, the male die 6 completely exits the cylindrical straight groove 901, and then the stripper block 11 is pushed downward by the stripper rod 10, so that the workpiece falls from the cylindrical straight groove 901, and the unloading action is completed.
[0029] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A pressing die, comprising a lower template and an upper template, wherein a male die and a female die aligned vertically are respectively disposed on the lower template and the upper template, characterized in that, The male mold is cylindrical, and its effective height during the forming process is greater than the circumferential wall length of the product. The lower surface of the female mold has a columnar straight groove aligned with the axial direction of the male mold and with a diameter greater than that of the male mold. Several vertically arranged ejector rods are arranged around the male mold, and the tops of the ejector rods are connected to a pressure ring fitted on the outer circumference of the male mold. The upper surface of the pressure ring has an annular positioning groove.
2. The pressing die according to claim 1, characterized in that, The male mold is provided with air holes, the upper end of which is connected to the top surface of the male mold, and the lower end of which is connected to an air inlet.
3. The pressing die according to claim 2, characterized in that, The top of the columnar straight groove is provided with a discharge block, and a material ejection rod connected to the discharge block is provided through the upper template.
4. The pressing die according to claim 1, characterized in that, A male mold fixing plate is fixedly installed on the upper surface of the lower template, and a stepped pressing hole is opened at the center of the male mold fixing plate. The lower end of the male mold is fixedly installed on the lower template through the stepped pressing hole.
5. The pressing die according to claim 1, characterized in that, The upper surface of the lower template is fixedly provided with a guide post, and the lower surface of the upper template is fixedly provided with a guide sleeve. The guide post and the guide sleeve are aligned and fitted together axially.