Double-arc-surface forming die structure for reducing multi-section difference surface bending extrusion of thick material
By adopting a double-arc forming punch design in the mold to bend in sequence, the problem of severe material extrusion in the bending and forming of thick materials with multi-segment differences is solved, thereby improving the flatness of the product and production efficiency.
Patent Information
- Application Number
- CN202422391121.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-09-29
AI Technical Summary
In existing technologies, when forming thick materials with multi-segment differential surfaces, the excessive thickness of the material and the forming of a single circular arc surface cause severe material extrusion on the bending surface of the product, affecting product yield and production efficiency.
The design employs a double-arc forming punch with sequential bending, utilizing two arc forming surfaces to reduce the stress on the product's bending surface, alleviate the material extrusion of the second arc forming surface onto the first segment, and improve the flatness of the product's bending surface.
By reducing the mold structure for bending and extruding thick materials with multiple uneven surfaces, the flatness of the product and production efficiency are improved, thereby enhancing product quality and production safety.
Smart Images
Figure CN223454944U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of mold technology, and particularly relates to a double arc surface forming mold structure for alleviating multi-stage differential surface bending and extrusion of thick materials. Background Art
[0002] The traditional process for forming and bending with a stamping die is to design contoured modules for the upper and lower dies. The blanking force presses the raw material into the formed shape between the upper and lower dies, thereby achieving the desired bending effect. In this embodiment, the product strip has special processing requirements. When its multiple step-difference surfaces are bent and formed, the existing technology, due to factors such as the thick material thickness and the single arc-shaped forming process, can lead to severe material extrusion on the bent surface of the product, resulting in low product yield and serious impact on production efficiency. Utility Model Content
[0003] In this embodiment, the product (such as Figure 4 (As shown) During stamping, the existing technology will cause serious material extrusion on the product's bending surface due to excessive material thickness and single arc surface forming, resulting in defective products and seriously affecting production efficiency. In order to compensate for the shortcomings of the existing technology, the utility model provides a double arc surface forming die structure that reduces the extrusion of thick materials during multi-stage differential bending. The two arc forming surfaces of the double arc surface forming punch are bent in sequence to reduce the force on the product's bending surface, reducing the extrusion of the second arc forming surface on the first stage differential surface of the product, thereby improving the flatness of the product's bending surface, improving product quality, and improving production efficiency and production safety.
[0004] In order to make up for the shortcomings of the existing technology, the utility model provides a double arc surface forming die structure that reduces the multi-stage differential bending and extrusion of thick materials. The technical solution is:
[0005] A double arc surface forming die for alleviating multi-stage differential bending and extrusion of thick materials, comprising an upper die and a lower die; the upper die comprises an upper die base, an upper pad, an upper clamping plate, a stop plate, and a stripper plate stacked in sequence; the lower die comprises a lower die plate, a lower pad, and a lower die base stacked in sequence;
[0006] The mold further includes a curved surface forming assembly, which includes a double-arc surface forming punch and a lower die forming insert; the upper end of the double-arc surface forming punch is fixed to the lower end surface of the upper pad, and the lower end passes through the stop plate and the stripper plate; the lower die forming insert is arranged in the lower template and can cooperate with the lower end processing surface of the double-arc surface forming punch when the mold is closed;
[0007] The lower end processing surface of the double arc surface forming punch has two arc forming surfaces, and the arc shapes of the arc processing surfaces can be the same or different;
[0008] The lower end processing surface of the double arc surface forming punch has the following characteristics:Figure 6 The structure shown,
[0009] The double-arc-surface forming punch lower end processing surface can be provided with 3-5 arc forming surfaces according to product requirements, and the arc shapes of the arc forming surfaces can be the same or different;
[0010] The mold further comprises a guide column assembly; the guide column assembly comprises an outer guide sleeve, a lower mold outer guide column assembly, an inner guide column, an upper mold inner guide column, and a lower mold inner guide sleeve;
[0011] The inner guide column is arranged inside the upper backing plate, the upper mold inner guide sleeve is arranged inside the stripper plate, and the inner guide column passes through the upper clamp plate, the stop plate and the upper mold inner guide sleeve; when the mold is closed, the inner guide column can cooperate with the lower mold inner guide sleeve arranged in the lower mold plate;
[0012] The outer guide sleeve is arranged inside the upper mold seat; the lower mold outer guide column assembly is arranged inside the lower mold seat and cooperates with the outer guide sleeve when the mold is closed;
[0013] The mold further comprises a hanging plate; the upper mold seat, the upper backing plate and the upper clamp plate are sequentially stacked and locked and connected; after the stop plate and the stripper plate are stacked and locked, the hanging plate is connected to the upper clamp plate;
[0014] The mold further comprises a nitrogen gas spring; the upper end of the nitrogen gas spring is arranged in the upper mold seat, and the lower end passes through the upper backing plate and the upper clamp plate.
[0015] Beneficial effects
[0016] The utility model relates to product in stamping forming, and the prior art will cause product bending surface extrusion to be serious because of material super thick and single arc surface forming, causes product to be defective, seriously influences production efficiency. In order to make up for the deficiency of prior art, the utility model provides a kind of double arc surface forming mold structure for reducing thick material multi-section difference surface bending extrusion, utilize the bending sequence of the two arc forming surfaces of double arc surface forming punch, make the stress of product bending surface reduce, reduce the extrusion of the second arc forming surface to product first section difference surface, to improve the flatness of product bending surface, improve the quality of product, improve production efficiency and production safety. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 A mold structure for reducing thick material multi-section difference surface bending extrusion of double arc surface forming provided by the utility model is shown in the open mold schematic view.
[0018] Figure 2 A mold structure for reducing thick material multi-section difference surface bending extrusion of double arc surface forming provided by the utility model is shown in the closed mold schematic view.
[0019] Figure 3It is a partial schematic diagram of the material strip in the embodiment of the present utility model.
[0020] Figure 4 This is a partial schematic diagram of a product in an embodiment of the present utility model.
[0021] Figure 5 Schematic diagram of three limit states of the double arc surface forming punch in the embodiment of the present utility model.
[0022] Figure 6 Schematic diagram of a double arc surface forming punch in an embodiment of the present utility model.
[0023] Description of the marks in the figure:
[0024] 1——Upper die seat 2——Upper pad
[0025] 3——Upper splint 4——Stop plate
[0026] 5——Stripping board 6——Hanging board
[0027] 7——lower template 8——lower pad
[0028] 9——lower die base 10——lower die forming insert
[0029] 11——Product strip 12——Guide sleeve in lower die
[0030] 13——Lower die outer guide pin assembly 14——Upper die inner guide sleeve
[0031] 15——Outer guide sleeve 16——Inner guide pin
[0032] 17——Dual arc surface forming punch 18——Nitrogen spring DETAILED DESCRIPTION
[0033] Example
[0034] In this embodiment, the product (such as Figure 4 (As shown) During stamping, the existing technology will cause serious material extrusion on the product's bending surface due to excessive material thickness and single arc surface forming, resulting in defective products and seriously affecting production efficiency. In order to compensate for the shortcomings of the existing technology, the utility model provides a double arc surface forming die structure that reduces the extrusion of thick materials during multi-stage differential bending. The two arc forming surfaces of the double arc surface forming punch are bent in sequence to reduce the force on the product's bending surface, reducing the extrusion of the second arc forming surface on the first stage differential surface of the product, thereby improving the flatness of the product's bending surface, improving product quality, and improving production efficiency and production safety.
[0035] 1. Combination of the following Figures 3-4 The molded product involved in this utility model is described as follows:
[0036] The final molding state of the product in this embodiment is as follows Figure 4 As shown, Figure 4 The figure shows the top view and side view of the molded product. From the side view, the product has three sections with thicknesses of 3.80mm, 4.00mm and 2.50mm respectively, and the thickness of the remaining section is 4.00mm. The molded product involved in this utility model is obtained after multiple steps of processing. Figure 3 A simplified schematic diagram of the multi-step process of processing the material strip.
[0037] Figure 3 The processing steps in the diagram are as follows: first punching processing step - thinning processing step - second punching processing step - double arc surface forming punch bending step - multiple ordinary bending steps. After the above steps, the following is obtained. Figure 4 The molded product shown. Among them, the structure of the double arc surface forming mold provided by the utility model to reduce the multi-stage differential bending and extrusion of thick materials is a mold structure designed for the "double arc surface forming punch bending step".
[0038] 2. Combination of the following Figures 1-6 The structure of a double arc surface forming die for alleviating the multi-stage differential bending and extrusion of thick materials provided by the present invention is described as follows:
[0039] The utility model provides a new mold process design structure for double bending forming in one step without deformation of the material, including an upper mold, a lower mold, a guide column assembly, and a curved surface forming assembly;
[0040] The upper die includes an upper die base 1, an upper pad 2, an upper clamping plate 3, a stop plate 4, a stripper plate 5, a hanging plate 6, an inner guide pin 16, an upper die inner guide sleeve 14, a nitrogen spring 18 and an outer guide sleeve 15;
[0041] The lower die includes a lower die plate 7, a lower backing plate 8, a lower die base 9, a lower die inner guide sleeve 12 and a lower die outer guide column assembly 13;
[0042] The guide pin assembly includes an outer guide sleeve 15, a lower die outer guide pin assembly 13, an inner guide pin 13, an upper die inner guide pin 14, and a lower die inner guide sleeve 12;
[0043] The arc surface forming assembly includes a double arc surface forming punch 17 and a lower die forming insert 10;
[0044] The upper die base 1, upper pad 2, and upper clamping plate 3 are sequentially stacked and locked together; the stop plate 4 is stacked and locked together with the stripper plate 5, and then connected to the upper clamping plate 3 via the hanging plate 6; one end of the nitrogen spring 18 is disposed in the upper die base 1, and the other end passes through the upper pad 2 and the upper clamping plate 3, and contacts the stop plate 4 when the mold is closed;
[0045] One end of the double arc surface forming punch 17 is fixed to the lower end surface of the upper pad 2, and the other end is the punch end. The punch end passes through the stop plate 4 and the stripper plate 5, and can cooperate with the lower mold forming insert 10 set in the lower mold plate 7 when the mold is closed;
[0046] The lower template 7, the lower pad 8, and the lower die base 9 are sequentially stacked and locked;
[0047] The inner guide pin 16 is arranged inside the upper backing plate 2, and the upper die inner guide sleeve 14 is arranged inside the stripper plate 5. The inner guide pin 16 passes through the upper clamping plate 3, the stop plate 4, and the upper die inner guide sleeve 14; when the mold is closed, the inner guide pin 16 can cooperate with the lower die inner guide sleeve 12 built into the lower template;
[0048] The outer guide sleeve 15 is arranged inside the upper mold base 1; the lower mold outer guide column assembly 13 is arranged inside the lower mold base 9, and cooperates with the outer guide sleeve 15 when the mold is closed.
[0049] like Figure 6 The schematic diagram of the double arc surface forming punch 17 shown in the figure, the double arc surface forming punch 17 has two arc forming surfaces. This arrangement is to utilize the successive bending order of the two arc forming surfaces of the double arc surface forming punch to reduce the force on the bending surface of the product, reduce the extrusion of the second arc forming surface on the first section difference surface of the product, and improve the flatness of the bending surface of the product.
[0050] 3. Combination of the following Figures 1-6 The working principle of the double arc surface forming die provided by the utility model for alleviating the multi-stage differential bending and extrusion of thick materials is explained as follows:
[0051] Step 1: Assemble and debug the mold, and install the debugged mold as a whole into the punch press;
[0052] Step 2: Adjust the installed mold to the open mold state, and place the sheet processed by the previous step into the forming processing position of the double arc surface forming punch 17;
[0053] Step 3: The mold enters the production state. The punch moves downward, driving the upper mold downward. The lower mold outer guide pin assembly 13 is inserted into the upper mold outer guide sleeve 15, and the upper mold inner guide pin 16 is inserted into the lower mold inner guide sleeve 12. As the upper mold continues to move downward, the stripper plate 5 contacts the upper end surface of the product strip 11 first, so that the product strip 11 fits the lower mold plate 7.
[0054] Step 4: The upper die continues to descend and compresses the nitrogen spring 18. During the downward movement, the first and second arc forming surfaces of the double arc forming punch 17 contact the product strip 11 in sequence until the die is closed. At this point, the product strip 11 is bent by the double arc forming punch and the forming step is completed.
[0055] Step five, the mold is opened, the product strip 11 processed by the double circular arc surface forming punch bending step enters the next step processing; after the mold is completely opened, the upper mold, the arc surface forming assembly and the lower mold complete resetting, and a new batch of product strips 11 to be processed enter the processing position to perform a new round of double circular arc surface forming punch bending step processing.
[0056] Need to be explained is that the final product has multiple high-low differences, and the double circular arc surface forming punch 17 has two circular arc forming surfaces, and the bending forming process of step four has three extreme states in total, the first extreme state is that the first circular arc forming surface of the double circular arc surface forming punch 17 just starts to contact the third difference surface of the product strip, the second extreme state is that the first and second circular arc forming surfaces of the double circular arc surface forming punch 17 simultaneously contact the third and first difference surfaces of the product, and the third extreme state is that the mold is lowered to the closed state, and the double circular arc surface forming punch 17 performs stamping processing on the first difference surface of the product strip 11.
[0057] From the first extreme state to the second extreme state, the first circular arc forming surface of the double circular arc surface forming punch 17 first partially bends the product strip 11, so that the bending edge of the product strip to be processed is partially bent, and part of the bending force is released; therefore, in the process from the second extreme state to the third extreme state, when the second circular arc forming surface performs stamping processing on the first difference surface of the product strip 11, the extrusion degree of the first difference surface is reduced, thereby improving the flatness of the first difference surface of the product strip 11.
Claims
1. A mold structure for forming a double circular arc surface of thick material multi-stage difference surface bending extrusion, comprising an upper mold and a lower mold; the upper mold comprises an upper mold base, an upper pad, an upper clamp plate, a stop plate and a stripping plate which are sequentially stacked; the lower mold comprises a lower mold plate, a lower pad and a lower mold base which are sequentially stacked; characterized in that the mold further comprises an arc surface forming assembly, the arc surface forming assembly comprises a double circular arc surface forming punch and a lower mold forming insert; the upper end of the double circular arc surface forming punch is fixed to the lower end surface of the upper pad, and the lower end penetrates through the stop plate and the stripping plate; the lower mold forming insert is arranged in the lower mold plate and can cooperate with the lower end processing surface of the double circular arc surface forming punch when the mold is closed.
2. The mold structure of claim 1, wherein The lower end processing surface of the double circular arc surface forming punch has two circular arc forming surfaces, and the circular arc shapes of the circular arc processing surfaces can be the same or different.
3. The mold structure of claim 2, wherein The lower end processing surface of the double circular arc surface forming punch can be provided with 3-5 circular arc forming surfaces according to product needs, and the circular arc shapes of the circular arc forming surfaces can be the same or different.
4. The mold structure of claim 1, wherein, The mold further comprises a guide column assembly; the guide column assembly comprises an outer guide sleeve, a lower mold outer guide column assembly, an inner guide column, an upper mold inner guide column and a lower mold inner guide sleeve; the inner guide column is arranged inside the upper pad, the upper mold inner guide sleeve is arranged inside the stripping plate, and the inner guide column penetrates through the upper clamp plate, the stop plate and the upper mold inner guide sleeve; when the mold is closed, the inner guide column can cooperate with the lower mold inner guide sleeve arranged in the lower mold plate; the outer guide sleeve is arranged inside the upper mold base; the lower mold outer guide column assembly is arranged inside the lower mold base, and cooperates with the outer guide sleeve when the mold is closed.
5. The mold structure of claim 1, wherein The mold further comprises a hanging plate; the upper mold base, the upper pad and the upper clamp plate are sequentially stacked and locked and connected; after the stop plate and the stripping plate are stacked and locked, they are connected to the upper clamp plate through the hanging plate.
6. The mold structure of claim 1, wherein The mold further comprises a nitrogen gas spring; the upper end of the nitrogen gas spring is arranged in the upper mold base, the lower end penetrates through the upper pad and the upper clamp plate, and the upper end surface of the stop plate is contacted during the closing process of the mold.