transverse stretching mechanism

Abstract

The utility model relates to the technical field of punch die, specifically disclose a kind of transverse stretching mechanism. Including upper die holder and lower die holder, upper die holder is fixed with upper die forming insert below, the both sides of upper die forming insert are equipped with upper die slider, and upper die slider is equipped with elastic reset piece and is connected in transverse sliding below upper die holder;Lower die holder is fixed with the lower die kernel directly opposite with upper die forming insert, the both sides of lower die kernel are equipped with edge ring, and edge ring is equipped with first lower die elastic member and lower die holder elastic assembly, and the top surface of the edge ring of the both sides of lower die kernel is inclined downward to the side of lower die kernel, and float is equipped on the edge ring, and float can be moved along the direction of its inclined top surface, and float is directly opposite with upper die slider, and second lower die elastic member is assembled between the bottom surface of float and the top surface of edge ring, and the elastic force of second lower die elastic member is less than first lower die elastic member.

Description

Technical Field

[0001] This utility model relates to the technical field of stamping dies, and specifically discloses a transverse stretching mechanism. Background Technology

[0002] Existing transverse stretching mechanisms are typically used to form arched sheet metal. Their working principle involves the cooperation of an upper and lower die base, utilizing the die cavity to stamp and form the sheet metal. For example, in traditional punch press stretching dies, the upper and lower die assemblies work together to draw the sheet metal into the die cavity for forming. While this mechanism can meet the forming requirements of arched sheet metal to some extent, it still has some shortcomings in practical applications.

[0003] Taking the punching and stretching device with patent number CN214442216U as an example, it utilizes the pressure applied by the hydraulic press to the upper and lower templates of the stretching die to tightly press the two ends of the sheet metal material. Then, the lower cavity plate moves upward under the force transmission of the hydraulic press push rod, and the sheet metal material is smoothly pulled into the corresponding concave cavity at the bottom of the upper cavity plate through the convex mold cavity at the top of the lower cavity plate and formed. Although this structure, which directly punches and forms through the convex and concave mold cavities, can guarantee the forming effect of the sheet metal material to a certain extent, the resulting arched sheet metal has geometric springback characteristics. It is often difficult to maintain the arched shape after forming, and it is easy to flatten into a flat shape. The product edge springback is large. Conventional forming and compensation methods cannot match the customer's product surface requirements. To address this issue, a transverse stretching mechanism is proposed. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a transverse stretching mechanism.

[0005] This utility model discloses a transverse tensioning mechanism, which adopts the following technical solution: A transverse stretching mechanism includes an upper mold base and a lower mold base. An upper mold forming insert is fixedly disposed on the lower part of the upper mold base. Upper mold sliders are disposed on both sides of the upper mold forming insert. The upper mold sliders are provided with elastic reset members and are laterally slidably connected to the upper mold base. A lower mold core is fixedly disposed on the lower mold base, facing the upper mold forming insert. A pressure ring is disposed on both sides of the lower mold core. The pressure ring is provided with a first lower mold elastic member and elastically assembled with the lower mold base. The top surfaces of the pressure rings on both sides of the lower mold core are inclined downward toward the lower mold core. A float block is disposed on the pressure ring and can move along its inclined top surface direction. The float block is facing the upper mold slider. A second lower mold elastic member is assembled between the bottom surface of the float block and the top surface of the pressure ring. The elastic force of the second lower mold elastic member is less than that of the first lower mold elastic member.

[0006] Preferably, the upper mold slider includes a slider clamping part and a slider locking part, the slider clamping part is provided with a slider insert, and the slider locking part is provided with a locking block; the float block includes a float block clamping part and a float block locking part, the float block clamping part is provided with a float block groove that matches and is fitted into the slider insert, and the float block locking part is provided with a locking groove for the locking block to be inserted. Preferably, the locking block is provided with a slider side guide plate on its outer side.

[0007] Preferably, the upper mold base is provided with a cavity for mounting the upper mold slider, and a slider top guide plate is provided between the bottom of the cavity and the top of the slider.

[0008] Preferably, a float guide plate is provided inside the locking groove.

[0009] Preferably, the lower mold base is provided with a limiting guide plate, and the top of the float is provided with a limiting surface that is directly opposite to the limiting guide plate.

[0010] Preferably, the upper mold base is provided with a guide plate, and the lower mold base is provided with a guide groove for the guide plate to be inserted.

[0011] Preferably, both the upper mold base and the lower mold base are provided with lifting lugs.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects: This invention features an upper die slider with an elastic reset element installed under the upper die base, and a pressure ring with an inclined top surface and a movable float on the lower die base. During the stamping process, the upper die slider first cooperates with the float to stretch the sheet metal laterally. Then, the sheet metal contacts the lower die core, and the upper die base continues to descend until the upper die forming insert closes with the lower die core, completing the stamping of the sheet metal. This "stretch first, then form" method effectively reduces stress rebound, solves the problem of large springback in arched geometric products in traditional direct stamping, and improves the forming accuracy and quality stability of the product. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the mold opening state of the transverse stretching mechanism in this embodiment; Figure 2 This is a schematic diagram showing the state of the two ends of the sheet metal clamped by the transverse stretching mechanism in this embodiment. Figure 3 This is a schematic diagram of the state of the transversely stretched sheet material in the transverse stretching mechanism of this embodiment; Figure 4 This is a schematic diagram of the arched sheet metal forming state of the transverse stretching mechanism in this embodiment. Figure 5 This is a schematic diagram of the upper mold slider of the transverse stretching mechanism in this embodiment.

[0014] Explanation of icon numbers: 1. Upper mold base; 101. Guide plate; 2. Upper mold forming insert; 3. Upper mold slider; 31. Slider insert; 32. Locking block; 301. Slider side guide plate; 302. Slider top guide plate; 4. Elastic reset component; 5. Lower mold base; 501. Limiting plate; 6. Lower mold core; 7. Pressure ring; 8. First lower mold elastic component; 9. Floating block; 91. Floating block groove; 92. Locking groove; 901. Floating block guide plate; 10. Second lower mold elastic component; 11. Lifting lug. Detailed Implementation

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] This embodiment discloses a transverse tensioning mechanism, referring to... Figure 1-4 It includes an upper mold base 1 and a lower mold base 5. An upper mold forming insert 2 is fixedly provided under the upper mold base 1. Upper mold sliders 3 are provided on both sides of the upper mold forming insert 2. The upper mold sliders 3 are provided with elastic reset members 4 and are laterally slidably connected under the upper mold base 1. See Figure 5 The elastic reset component 4 may specifically include a nitrogen counterblock mounted on the upper mold base 1 and a retracting nitrogen spring connected to the nitrogen counterblock. The retracting nitrogen spring acts on one side of the upper mold slider 3. The lower mold base 5 is fixedly provided with a lower mold core 6 that is directly opposite to the upper mold forming insert 2. The lower mold core 6 is provided with pressure rings 7 on both sides. The pressure rings 7 are provided with a first lower mold elastic component 8 that is elastically assembled with the lower mold base 5. In fact, the pressure rings 7 can be a structure that surrounds the outer circumference of the lower mold core 6. The top surfaces of the pressure rings 7 on both sides of the lower mold core 6 are inclined downward toward the lower mold core 6. The pressure rings 7 are provided with floats 9 that can move along their inclined top surfaces. The floats 9 are directly opposite to the upper mold slider 3. A second lower mold elastic component 10 is assembled between the bottom surface of the floats 9 and the top surface of the pressure rings 7. The elastic force of the second lower mold elastic component 10 is less than that of the first lower mold elastic component 8. Both the first lower mold elastic component 8 and the second lower mold elastic component 10 can be nitrogen springs.

[0017] The transverse stretching mechanism of this solution employs the above structural design. During the stamping process, the upper die slider 3 first cooperates with the float block 9 to clamp the sheet metal, stretching it laterally until the second lower die elastic element 10 is compressed to the bottom. Then, the sheet metal begins to contact the lower die core 6. The upper die base 1 continues to descend and compress the first lower die elastic element 8 until the upper die forming insert 2 closes with the lower die core 6, completing the stamping of the sheet metal. This mechanism stretches the sheet metal first and then forms it, which can effectively reduce the springback problem after product forming and improve product quality and stability.

[0018] As a preferred embodiment, the upper die slider 3 includes a slider clamping part and a slider locking part. The slider clamping part is provided with a slider insert 31, and the slider locking part is provided with a locking block 32. The float block 9 includes a float block clamping part and a float block locking part. The float block clamping part is provided with a float block groove 91 that matches and is fitted into the slider insert 31, and the float block locking part is provided with a locking groove 92 for the locking block 32 to be inserted. This structural design enables precise clamping and locking between the upper die slider 3 and the float block 9, ensuring the stability and reliability of the product during the stretching process and further improving the molding quality of the product.

[0019] As a preferred embodiment, a slider-side guide plate 301 is provided on the outer side of the locking block 32. The slider-side guide plate 301 serves a guiding function, making the insertion process of the locking block 32 of the upper die slider 3 smoother and preventing jamming or offset, thereby ensuring a smoother fit between the upper die slider 3 and the float block 9, and improving the operating efficiency and stability of the entire stretching mechanism. In addition, a float block guide plate 901 is provided on the inner side of the locking groove 92. The float block guide plate 901 has a similar function to the slider-side guide plate 301, further improving the smoothness of the fit between the upper die slider 3 and the float block 9.

[0020] As a preferred embodiment, the upper mold base 1 is provided with a cavity for mounting the upper mold slider 3, and a slider top guide plate 302 is provided between the bottom of the cavity and the top of the slider. The slider top guide plate 302 is designed to guide the top of the upper mold slider 3, keeping it stable during lateral sliding and preventing wobbling or tilting, thereby ensuring the accuracy and consistency of the stretching process and further improving the molding precision of the product.

[0021] As a preferred embodiment, the lower mold base 5 is provided with a limiting plate 501, and the top of the float 9 is provided with a limiting surface directly opposite the limiting plate 501. The cooperation between the limiting plate 501 and the limiting surface can limit the stroke of the float 9, preventing the float 9 from being ejected upwards beyond the predetermined range by the action of the lower mold elastic element when the mold opens. This avoids problems such as poor molding or equipment damage caused by the float 9 colliding with the product due to excessive stroke, thereby improving the safety and reliability of the equipment.

[0022] As a preferred embodiment, the upper mold base 1 is provided with a guide plate 101, and the lower mold base 5 is provided with a guide groove into which the guide plate 101 is inserted. The cooperation between the guide plate 101 and the guide groove can guide the relative movement between the upper mold base 1 and the lower mold base 5, so that they maintain precise alignment during mold closing and opening, avoiding misalignment or skewing, thereby ensuring the forming accuracy and quality of the product and improving the operational stability and reliability of the entire stretching mechanism.

[0023] As a preferred option, both the upper mold base 1 and the lower mold base 5 are equipped with lifting lugs 11. The lifting lugs 11 facilitate the hoisting and transportation of the upper mold base 1 and the lower mold base 5, making the installation, debugging and maintenance of the equipment convenient, improving work efficiency, and also providing convenient conditions for the daily maintenance and repair of the equipment.

[0024] The working process of the transverse tensioning mechanism in this scheme is as follows: like Figure 1 As shown, in the mold open state, the elastic reset component 4 acts on the upper mold slider 3, causing it to abut against one side of the upper mold forming insert 2; like Figure 2 As shown, the mold begins to close, and the upper mold base 1 drives the upper mold forming insert 2 and the upper mold slider 3 to move down synchronously. The upper mold slider 3 first contacts the float block 9, thereby clamping the sheet metal between the slider insert 31 of the upper mold slider 3 and the float block groove 91 of the float block 9.

[0025] like Figure 3 As shown, the upper mold base 1 continues to descend, causing the upper mold slider 3 to press down on the float 9 and compress the second lower mold elastic element 10, so that the upper mold slider 3 and the float 9 clamp the sheet metal. As the upper mold slider 3 presses down on the float 9, the float 9 slides along the inclined top surface of the pressure ring 7 when it moves down, thereby generating an outward lateral displacement during the downward movement, stretching the sheet metal laterally until the float 9 is compressed to the bottom of the stroke on the second lower mold elastic element 10. like Figure 4 As shown, the upper die holder 1 continues to descend, causing the sheet metal to begin to contact the lower die core 6, until the upper die holder 1 compresses the pressure ring 7 to the bottom of the first lower die elastic member 8. The sheet metal is then sandwiched between the upper die forming insert 2 and the lower die core 6, and the upper die holder 1 and the pressure ring 7 close, completing the stamping and forming of the arched sheet metal.

[0026] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A transverse stretching mechanism, comprising an upper die base and a lower die base, characterized in that, The upper mold base is fixedly provided with an upper mold forming insert, and the upper mold forming insert is provided with upper mold sliders on both sides. The upper mold sliders are provided with elastic reset members and are laterally slidably connected under the upper mold base. The lower mold base is fixedly provided with a lower mold core that is directly opposite to the upper mold forming insert. The lower mold core is provided with pressure rings on both sides. The pressure rings are provided with a first lower mold elastic element that is elastically assembled with the lower mold base. The top surfaces of the pressure rings on both sides of the lower mold core are inclined downwards towards the lower mold core. The pressure rings are provided with floats that can move along their inclined top surfaces. The floats are directly opposite the upper mold slider. A second lower mold elastic element is assembled between the bottom surface of the floats and the top surface of the pressure rings. The elastic force of the second lower mold elastic element is less than that of the first lower mold elastic element.

2. The transverse stretching mechanism according to claim 1, characterized in that, The upper mold slider includes a slider clamping part and a slider locking part. The slider clamping part is provided with a slider insert, and the slider locking part is provided with a locking block. The float block includes a float block clamping part and a float block locking part. The float block clamping part is provided with a float block groove that matches and is fitted into the slider insert, and the float block locking part is provided with a locking groove for the locking block to be inserted.

3. The transverse stretching mechanism according to claim 2, characterized in that, The locking block is provided with a slider side guide plate on its outer side.

4. The transverse stretching mechanism according to claim 2, characterized in that, The upper mold base is provided with a cavity for mounting the upper mold slider, and a slider top guide plate is provided between the bottom of the cavity and the top of the slider.

5. The transverse stretching mechanism according to claim 2, characterized in that, A float guide plate is provided inside the locking groove.

6. The transverse stretching mechanism according to claim 1, characterized in that, The lower mold base is provided with a limiting guide plate, and the top of the float is provided with a limiting surface that is directly opposite the limiting guide plate.

7. The transverse stretching mechanism according to claim 1, characterized in that, The upper mold base is provided with a guide plate, and the lower mold base is provided with a guide groove for the guide plate to be inserted.

8. The transverse stretching mechanism according to claim 1, characterized in that, Both the upper mold base and the lower mold base are equipped with lifting lugs.

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