Stamping die and ejection structure

Abstract

The utility model provides a kind of stamping die and ejection structure, comprising: lower die holder, the gas top assembly includes the conveying gas pipe for conveying compressed gas, the conveying gas pipe is connected with the lower end of gas nozzle by branch pipe and is sealed, each the guide base inside is symmetrically equipped with two gas nozzles for gas top, in actual use, the setting of gas nozzle can be mutually matched with guide rod to eject the element of stamping forming, can avoid the problem of stress concentration caused by single-point ejection occurs, compared with prior art, the utility model has the beneficial effects as follows: by setting gas top assembly, the stress concentration problem that forming element is received when ejecting can be avoided, and then the ejection force can be only applied to the single position of part, make the area bear far higher than other parts Stress problem, can avoid the necking phenomenon generated when stress exceeds material yield strength even exceeds tensile strength and leads to cracking.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology, and specifically relates to a stamping mold and an ejection structure. Background Technology

[0002] Existing stamping dies, during single-point ejection, are prone to causing localized stress concentration in thin-walled parts, leading to necking or cracking. This drawback stems from the fact that the ejection force acts only on a single location on the part, causing that area to bear much higher stress than other parts. When the stress exceeds the material's yield strength, necking occurs; and if it further exceeds the tensile strength, cracking will result.

[0003] Conventional solutions include optimizing the ejection structure, such as using multi-point ejection to disperse stress, and rationally modifying the mold cavity to improve material motion. However, these methods have certain drawbacks: multi-point ejection structures increase mold complexity and manufacturing costs, and while mold modification can partially alleviate stress concentration problems, it is difficult to completely eliminate them. Therefore, we hope to design a stamping die with a novel structure to solve this problem. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a stamping die and an ejection structure to solve the problems mentioned in the background art.

[0005] This utility model is achieved through the following technical solution: a stamping die and ejection structure, comprising: a lower die base, wherein an air ejector assembly for stamping is installed on the upper side of the lower die base, the lower die base includes a lower die core for stamping, and four guide seats are installed in a rectangular shape inside the lower die core;

[0006] The air-lift assembly includes a delivery pipe for conveying compressed gas. The delivery pipe is sealed to the lower end of the air nozzle through a branch pipe. Each guide seat has two air nozzles symmetrically installed inside for air lifting. In actual use, the air nozzles can cooperate with the guide rod to eject the stamped component, which can avoid stress concentration caused by single-point ejection.

[0007] In a preferred embodiment, the upper surface of the guide seat has four guide holes extending downwards, the four guide holes being distributed in a rectangular structure, and an exhaust hole extending downwards through the middle of the upper surface of the guide seat, the axis of the exhaust hole being collinear with the axis of the guide seat.

[0008] In a preferred embodiment, the lower die core is recessed downwards at the four guide seats to form stamping grooves, the upper end of the guide seat is placed at the bottom of the groove, and the front and rear sides of the upper surface of the guide seat respectively form a fixing hole through downwards.

[0009] In a preferred embodiment, the two fixing holes and the four guide holes are arranged in a ring and are equidistant, and the lower end of each fixing hole is sealed to the upper end of a branch pipe.

[0010] In a preferred embodiment, the lower mold base is equipped with four sets of ejector rods arranged in a rectangular structure. Each set has four ejector rods arranged in a rectangular structure. The distribution of the four ejector rods matches the distribution of the four guide holes. The multiple ejector rods can effectively disperse the stress distribution generated by ejecting the molding element.

[0011] In a preferred embodiment, the air nozzle includes a fixing sleeve, which is installed inside a fixing hole, and the height of the fixing sleeve is less than the depth of the fixing hole. The bottom of the fixing sleeve is connected to the upper end of the branch pipe through the bottom of the fixing hole.

[0012] In a preferred embodiment, the inner wall of the fixing sleeve is provided with a boss, the inner diameter of which is smaller than the diameter of the fixing sleeve, and a slide rod and a limiting head are movably installed inside the upper side of the fixing sleeve.

[0013] In a preferred embodiment, the limiting head is placed at the upper end of the slide rod, the diameter of the limiting head gradually decreases from top to bottom, the maximum diameter at the upper end of the limiting head is smaller than the inner diameter of the fixed sleeve and larger than the inner diameter of the boss, the inner diameter of the slide rod matches the inner diameter of the boss, and the maximum rising distance of the limiting head is 5mm higher than the upper end of the groove and flush with the maximum ejection distance of the ejector rod.

[0014] After adopting the above technical solution, the beneficial effects of this utility model are: 1. By setting the guide seat, the four guide holes and four ejector rods can simultaneously lift the four positions at the bottom of the forming element in the groove, thereby reducing the single-point stress on the forming element during ejection. The vent hole in the middle can discharge a large amount of gas generated by the lifting assembly to prevent the airflow inside from rushing out, and also to exhaust gas during stamping.

[0015] 2. By setting up an air-cushion assembly, the stress concentration problem of the forming element during ejection can be avoided. This solves the problem that the ejection force only acts on a single position of the part, causing that area to bear much higher stress than other parts. It can also avoid the necking phenomenon caused by stress exceeding the material yield strength or even exceeding the tensile strength, which can lead to cracking. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of a stamping die and ejection structure according to the present invention.

[0018] Figure 2 This is a schematic diagram showing the connection between the guide seat and the lower die core of a stamping die and ejection structure according to this utility model.

[0019] Figure 3 This is a schematic diagram showing the connection between the air ejector assembly and the guide seat of a stamping die and ejection structure according to this utility model.

[0020] Figure 4 This is a schematic diagram of the lower structure of the fixed sleeve of a stamping die and ejection structure according to the present invention.

[0021] Figure 5 This is a schematic diagram of the upper structure of the fixed sleeve of a stamping die and ejection structure according to the present invention.

[0022] Figure 6 This is a schematic diagram of the sliding rod and limiting head structure of a stamping die and ejection structure according to the present invention.

[0023] In the diagram, 100-lower mold base, 110-lower mold core, 120-guide seat, 121-guide hole, 122-vent hole, 123-fixing hole;

[0024] 200-Air top assembly, 210-Air delivery pipe, 220-Branch pipe, 230-Air nozzle, 231-Fixing sleeve, 232-Boss, 233-Slide rod, 234-Limit head. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] As the first embodiment of this utility model:

[0027] Please see Figures 1 to 3A stamping die and ejection structure, comprising: a lower die base 100, an air ejector assembly 200 for stamping is mounted on the upper side of the lower die base 100, the lower die base 100 includes a lower die core 110 for stamping, and four guide seats 120 are mounted in a rectangular shape inside the lower die core 110.

[0028] The air-lift assembly 200 includes a delivery pipe 210 for conveying compressed gas. The delivery pipe 210 is sealed to the lower end of the air nozzle 230 through a branch pipe 220. Each guide seat 120 has two air nozzles 230 symmetrically installed inside for air lifting. In actual use, the air nozzles 230 can cooperate with the guide rod to eject the stamped component, which can avoid the stress concentration problem caused by single-point ejection.

[0029] Four guide holes 121 are formed through the upper surface of the guide seat 120. The four guide holes 121 are distributed in a rectangular structure. An exhaust hole 122 is formed through the middle of the upper surface of the guide seat 120. The axis of the exhaust hole 122 is collinear with the axis of the guide seat 120.

[0030] The lower die core 110 is recessed downwards at the four guide seats 120 to form stamping grooves. The upper end of the guide seat 120 is placed at the bottom of the groove. The front and rear sides of the upper surface of the guide seat 120 respectively form a fixing hole 123.

[0031] The two fixing holes 123 and the four guide holes 121 are arranged in a ring and are equidistant. The lower end of each fixing hole 123 is sealed to the upper end of a branch pipe 220.

[0032] The lower mold base 100 is equipped with four sets of ejector rods arranged in a rectangular structure. Each set has four ejector rods arranged in a rectangular structure. The distribution of the four ejector rods matches the distribution of the four guide holes 121. The multiple ejector rods can effectively disperse the stress distribution generated by ejecting the molding element.

[0033] Specifically, in actual use, the upper surface of the guide seat 120 forms four guide holes 121 extending downwards, and the four guide holes 121 are distributed in a rectangular structure. The upper surface of the guide seat 120 also forms an exhaust hole 122 extending downwards in the middle. The axis of the exhaust hole 122 is collinear with the axis of the guide seat 120. The four guide holes 121, together with the four ejector rods, can simultaneously lift the four positions at the bottom of the forming element in the groove, thereby reducing the single-point stress on the forming element during ejection. The exhaust hole 122 located in the middle can discharge a certain amount of gas generated by the lifting assembly, preventing the airflow inside from rushing out, and also venting during stamping.

[0034] As a second embodiment of this utility model:

[0035] Please see Figures 1 to 6The air nozzle 230 includes a fixing sleeve 231, which is installed inside the fixing hole 123. The height of the fixing sleeve 231 is less than the depth of the fixing hole 123. The bottom of the fixing sleeve 231 is connected to the upper end of the branch pipe 220 through the bottom of the fixing hole 123.

[0036] The inner wall of the fixed sleeve 231 is provided with a boss 232. The inner diameter of the boss 232 is smaller than the diameter of the fixed sleeve 231. A slide rod 233 and a limiting head 234 are movably installed inside the upper side of the fixed sleeve 231.

[0037] The limiting head 234 is placed on the upper end of the slide rod 233. The diameter of the limiting head 234 gradually decreases from top to bottom. The maximum diameter of the upper end of the limiting head 234 is smaller than the inner diameter of the fixing sleeve 231 and larger than the inner diameter of the boss 232. The inner diameter of the slide rod 233 matches the inner diameter of the boss 232. The maximum rising distance of the limiting head 234 is 5mm higher than the upper end of the groove and is flush with the maximum ejection distance of the ejector rod.

[0038] Based on the first embodiment described above, further, in actual use, since the two fixing holes 123 and the four guide holes 121 are arranged in a ring and are equidistant, the lower end of each fixing hole 123 is sealed to the upper end of a branch pipe 220, and the air nozzle 230 includes a fixing sleeve 231, which is installed inside the fixing hole 123. The height of the fixing sleeve 231 is less than the depth of the fixing hole 123, and the bottom of the fixing sleeve 231 is connected to the upper end of the branch pipe 220 through the bottom of the fixing hole 123. After the stamping of the forming element is completed, the ejector rod and the air delivery pipe 210 are started simultaneously. The air delivery pipe 210 delivers compressed gas to the air nozzle 230 inside the fixing hole 123 through the branch pipe 220 (the air delivery pipe 210 is connected to an external compressed gas device through a solenoid valve, and its operation is synchronized with the ejector rod). The compressed gas pushes the slide rod 233 and the limiting head 234 inside the fixing sleeve 231 upwards through pressure (the sum of the weights of the slide rod 233 and the limiting head 234). The airflow thrust is greater than the upward thrust of the airflow (here, the airflow thrust refers to the upper end of the limiting head 234 moving to a position 5mm above the upper end of the groove). When the limiting head 234 is higher than the upper end of the fixing sleeve 231, the airflow rushes out of the fixing sleeve 231 to perform air-push on the molding element in the groove. Since the limiting head 234 is placed on the upper end of the slide rod 233, the diameter of the limiting head 234 gradually decreases from top to bottom, and the maximum diameter of the upper end of the limiting head 234 is smaller than the inner diameter of the fixing sleeve 231 and larger than the inner diameter of the boss 232. The inner diameter of the slide rod 233 matches the inner diameter of the boss 232. The slide rod 233 and the limiting head 234 will not be pushed out by the airflow. By setting the air-push assembly 200, the ejection effect can be enhanced, and the stress concentration problem of the molding element during ejection can be avoided. In addition, the ejection force can be solved by acting on a single position of the part, so that the area bears a much higher stress than other parts. This can avoid the necking phenomenon caused by the stress exceeding the yield strength of the material or even exceeding the tensile strength, which can lead to cracking.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stamping die and ejection structure, comprising: The lower die holder (100) is characterized in that an air ejector assembly (200) for stamping is installed on the upper side of the lower die holder (100), and the lower die holder (100) includes a lower die core (110) for stamping, and four guide seats (120) are installed in a rectangular shape inside the lower die core (110). The air-lift assembly (200) includes a delivery pipe (210) for delivering compressed gas. The delivery pipe (210) is sealed to the lower end of the air nozzle (230) through a branch pipe (220). Each guide seat (120) has two air nozzles (230) symmetrically installed inside for air lifting.

2. The stamping die and ejection structure as described in claim 1, characterized in that: The upper surface of the guide seat (120) has four guide holes (121) extending downwards, and the four guide holes (121) are distributed in a rectangular structure. The upper surface of the guide seat (120) has an exhaust hole (122) extending downwards in the middle, and the axis of the exhaust hole (122) is collinear with the axis of the guide seat (120).

3. The stamping die and ejection structure as described in claim 2, characterized in that: The lower die core (110) is recessed downwards at the four guide seats (120) to form stamping grooves. The upper end of the guide seat (120) is placed at the bottom of the groove. The front and rear sides of the upper surface of the guide seat (120) are respectively formed by a fixing hole (123) through downwards.

4. The stamping die and ejection structure as described in claim 3, characterized in that: The two fixing holes (123) and the four guide holes (121) are arranged in a ring and are equidistant. The lower end of each fixing hole (123) is sealed to the upper end of a branch pipe (220).

5. A stamping die and ejection structure as described in claim 2, characterized in that: The lower mold base (100) is equipped with four sets of ejector rods arranged in a rectangular structure. Each set has four ejector rods arranged in a rectangular structure, and the distribution of the four ejector rods matches the distribution of the four guide holes (121).

6. The stamping die and ejection structure as described in claim 5, characterized in that: The air nozzle (230) includes a fixing sleeve (231), which is installed inside the fixing hole (123). The height of the fixing sleeve (231) is less than the depth of the fixing hole (123). The bottom of the fixing sleeve (231) is connected to the upper end of the branch pipe (220) through the bottom of the fixing hole (123).

7. A stamping die and ejection structure as described in claim 6, characterized in that: The inner wall of the fixed sleeve (231) is provided with a boss (232), the inner diameter of the boss (232) is smaller than the diameter of the fixed sleeve (231), and a slide rod and a limiting head (234) are movably installed inside the upper side of the fixed sleeve (231).

8. A stamping die and ejection structure as described in claim 7, characterized in that: The limiting head (234) is placed on the upper end of the slide rod. The diameter of the limiting head (234) gradually decreases from top to bottom. The maximum diameter of the upper end of the limiting head (234) is smaller than the inner diameter of the fixing sleeve (231) and larger than the inner diameter of the boss (232). The inner diameter of the slide rod matches the inner diameter of the boss (232). The maximum rising distance of the limiting head (234) is 5mm higher than the upper end of the groove and is flush with the maximum ejection distance of the ejector rod.

Images