Precise inner inverted buckle punch forming die

Abstract

The utility model discloses a precise inner back-off punch forming die. The precise inner back-off punch forming die comprises an upper die base, an upper die plate, a lower base plate, a lower die base, a guide column, a guide sleeve, an upper forming assembly and two groups of lower forming assemblies, the upper die base and the upper die plate are fixed together, the lower base plate and the lower die base are fixed together, the upper end of the guide column is fixed to the upper die plate, the lower end of the guide column movably penetrates through the guide sleeve, and the guide sleeve is fixedly installed on the lower base plate. The upper forming assembly is installed on the upper die plate, and the two sets of lower forming assemblies are installed on the lower base plate and are oppositely arranged. Due to the fact that the upper forming assembly installed on the upper die plate moves downwards and is matched with the two sets of lower forming assemblies installed on the lower base plate, a horn mouth in an upper outer forming block in the upper forming assembly moves downwards under the action of a punch press sliding block, the outer edge of a product is extruded, an elastic piece on the product is forcibly bent inwards, and an inverted buckle structure is formed. And the forming mechanism has the advantages of reliable forming action and high yield.

Description

Technical Field

[0001] The utility model relates to a stamping die, in particular to a precision inner undercut stamping forming die. Background Art

[0002] Stamping die is a special process equipment that processes materials (metal or non-metal) into parts in cold stamping process. Figure 1 As shown, the upper part of the product 100 has a plurality of forked spring sheets 101, and the top of each spring sheet 101 needs to be bent inward to form an inverted structure of the inwardly bent section 102. The traditional bending mold cannot achieve the bending of the spring sheet 102, and a special mold needs to be designed. Utility Model Content

[0003] The utility model aims to provide a precise inner undercut stamping forming die with reliable forming action and high yield rate.

[0004] To achieve the above purpose, the technical solution of the utility model is:

[0005] The utility model is a precision inner undercut stamping forming die, comprising an upper die seat, an upper die plate, a lower pad, a lower die seat, a guide column, a guide sleeve, an upper forming component, and two groups of lower forming components;

[0006] The upper die base is fixed to the upper die plate, the lower pad is fixed to the lower die base, a through hole for product positioning is opened in the middle of the lower pad and the lower die base, the upper end of the guide column is fixed to the upper die plate, the lower end of the guide column is movably inserted into the guide sleeve, and the guide sleeve is fixedly mounted on the lower pad; the upper forming assembly is mounted on the upper die plate, and the two groups of lower forming assemblies are mounted on the lower pad and arranged opposite to each other, the two groups of lower forming assemblies are located directly below the upper forming assembly, and a product processing position is formed between the two groups of lower forming assemblies;

[0007] The upper forming assembly comprises a nitrogen cylinder, a cushion block, a push rod, an elastic sliding rod, an upper outer forming block, a slide rod latch, an inner forming block, and an inclined wedge; the cylinder body of the nitrogen cylinder is fixedly mounted on the upper die seat, the top core of the nitrogen cylinder passes through the cushion block and is connected to the upper end of the push rod, the cushion block is mounted in the upper die plate, the lower end of the push rod is inserted into the upper outer forming block and is connected to the upper end of the elastic sliding rod, the upper part of the elastic sliding rod is movably inserted into the upper outer forming block, and the slot on the upper part of the elastic sliding rod is slidably connected to the inner end of the slide rod latch, the outer end of the slide rod latch is fixed on the upper outer forming block, and the lower end of the elastic sliding rod is connected to the inner forming block;

[0008] The lower forming component includes a spring seat plate, a slider seat, a slider, a slider spring, a spring screw, and a lower outer forming block; the spring seat plate is fixed on the lower pad, the slider seat is slidably connected to the lower pad, the spring screw gap passes through the spring seat plate from the outside to the inside and is connected to the outer end of the slider seat, the outer end of the slider is fixed to the inner end surface of the slider seat, the top inclined surface of the slider is opposite to the bottom inclined surface of the inclined wedge in the upper forming component and the bottom inclined surface of the inclined wedge can be pressed against the top inclined surface of the slider, driving the slider to move inward, the slider spring is sleeved on the outside of the spring screw and the two ends of the slider spring are respectively pressed against the spring seat plate and the pan head of the spring screw, the lower outer forming block is fixed to the inner end of the slider, and the lower outer forming blocks on the two groups of lower forming components constitute the outer forming surface of the product.

[0009] The lower end of the upper outer forming block is provided with a bell mouth.

[0010] The utility model also comprises an upper pad foot and an upper supporting plate; the upper pad foot is connected between the upper die seat and the upper supporting plate.

[0011] The utility model also includes a lower pad, a lower supporting plate, and a product positioning column; the lower pad is connected between the lower mold base and the lower supporting plate, and the lower end of the product positioning column is fixed on the lower supporting plate and is located directly below the through hole in the middle of the lower pad and the lower mold base, for placing the product.

[0012] The upper template comprises an upper backing plate, an upper pad and an upper clamping plate; the upper backing plate, the upper pad and the upper clamping plate are fixed together in sequence.

[0013] After adopting the above scheme, since the utility model includes an upper die base, an upper template, a lower pad, a lower die base, a guide column, a guide sleeve, an upper forming component, and two groups of lower forming components, the upper forming component installed on the upper template moves downward and cooperates with the two groups of lower forming components installed on the lower pad, and the bell mouth on the upper outer forming block in the upper forming component moves downward under the action of the punch slider, squeezing the outer edge of the product to force the spring sheet on the product to bend inward to form a bending section and an inverted structure. Since the forming of the utility model is mainly completed by the upper forming component and the two groups of lower forming components, the forming action is reliable and the yield rate is high.

[0014] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Axonometric drawing of the product;

[0016] Figure 2 It is a schematic diagram of the utility model product before processing;

[0017] Figure 3 It is a schematic diagram of the upper molding component of the utility model not contacting the product;

[0018] Figure 4 It is a schematic diagram of the upper molding component contacting the product of the utility model;

[0019] Figure 5 It is a schematic diagram of the bending product of the upper forming component of the utility model;

[0020] Figure 6 It is a schematic diagram of the product of the utility model after molding. DETAILED DESCRIPTION

[0021] like Figure 2 As shown, the utility model is a precision internal undercut stamping forming die, comprising an upper die base 1, an upper die plate 2, a lower pad 3, a lower die base 4, an upper forming component 5, two sets of lower forming components 6, a guide column 7, a guide sleeve 8, an upper pad 9, an upper support plate 10, a lower pad 20, a lower support plate 30, and a product positioning column 40.

[0022] The upper mold base 1 is fixed together with the upper mold plate 2, the upper pad 9 is connected between the upper mold base 1 and the upper support plate 10, the lower pad 3 is fixed together with the lower mold base 4, the lower pad 20 is connected between the lower mold base 4 and the lower support plate 30, and a through hole 34 for positioning the product 100 is opened in the middle of the lower pad 3 and the lower mold base 4. The upper end of the guide column 7 is fixed on the upper mold plate 2, and the lower end of the guide column 7 is movably inserted in the guide sleeve 8, and the guide sleeve 8 is fixedly mounted on the lower pad 3; the upper forming component 5 is mounted on the upper mold plate 2, and two groups of lower forming components 6 are mounted on the lower pad 3 and arranged opposite to each other. The two groups of lower forming components 6 are located directly below the upper forming component 5, and a processing position for the product 100 is formed between the two groups of lower forming components 6. The lower end of the product positioning column 40 is fixed on the lower support plate 30 and is located directly below the through hole in the middle of the lower pad 3 and the lower mold base 4, for placing the product 100.

[0023] The upper template 2 includes an upper backing plate 21, an upper pad 22, and an upper clamping plate 23; the upper backing plate 21, the upper pad 22, and the upper clamping plate 23 are fixed together in sequence.

[0024] The upper forming assembly 5 includes a nitrogen cylinder 51, a cushion block 52, a push rod 53, an elastic slide rod 54, an upper outer forming block 55, a slide rod latch 56, an inner forming block 57, and an inclined wedge 58; the cylinder body of the nitrogen cylinder 51 is fixedly installed on the upper mold base 1, the top core of the nitrogen cylinder 51 passes through the cushion block 52 and is connected to the upper end of the push rod 53, the cushion block 52 is installed in the upper mold plate 2, the lower end of the push rod 53 is inserted into the upper outer forming block 55 and is connected to the upper end of the elastic slide rod 54, the upper part of the elastic slide rod 54 is movably inserted into the upper outer forming block 55, and the lower end of the upper outer forming block 55 has a trumpet mouth 551 for forming, the outer side of the upper part of the elastic slide rod 54 is provided with a slot 541 arranged along the length, the slot 541 is slidably connected with the inner end of the slide rod latch 56, the outer end of the slide rod latch 56 is fixed on the upper outer forming block 55, and the lower end of the elastic slide rod 56 is connected to the inner forming block 57.

[0025] The lower molding assembly 6 includes a spring seat plate 61, a slider seat 62, a slider 63, a slider spring 64, a spring screw 65, and a lower outer molding block 66; the spring seat plate 61 is fixed on the lower pad 3, the slider seat 62 is slidably connected to the lower pad 3, the spring screw 65 passes through the spring seat plate 61 from the outside to the inside and is connected to the outer end of the slider seat 62, the outer end of the slider 63 is fixed on the inner end surface of the slider seat 62, the top inclined surface 631 of the slider 63 is aligned with the bottom inclined surface 58 of the inclined wedge 58 in the upper molding assembly 5 The bottom inclined surface 581 of the inclined wedge 58 is opposite to the top inclined surface 631 of the slider 63, driving the slider 63 to move inward, the slider spring 64 is sleeved on the outside of the spring screw 65, and the two ends of the slider spring 64 are respectively pressed against the spring seat plate 61 and the pan head of the spring screw 65, the lower outer forming block 66 is fixed to the inner end of the slider 63, and the inner side shape of the lower outer forming block 66 corresponds to the outer wall of the product 100, and the lower outer forming blocks 66 on the two groups of lower forming components 6 constitute the outer forming surface of the product 100.

[0026] The working principle of this utility model:

[0027] like Figure 3 As shown, 1. the lower end of the product 100 is sleeved on the product positioning column 40, and the upper die moves downward under the action of the punch slide; 2. The inclined wedge 58 contacts the slide 63, causing the slide 63 to move inward until the slide is closed; 3. At the same time, the inner forming block 57 moves downward, and the product 100 blank is pressed into the closed slide 63 under the action of the nitrogen cylinder 51.

[0028] like Figure 4 As shown, 1. the upper die continues to move downward under the action of the punch slider; 2. at the same time, the inner forming block 57, the elastic slide rod 54, the push rod 53, the cushion block 52, and the top core of the nitrogen cylinder 51 remain motionless under the action of the nitrogen pressure; 3. the upper outer forming block 55 moves downward under the action of the punch slider, starts to squeeze the outer edge of the product 100, and performs an inward buckling forming movement until the punch slider reaches the lower starting point.

[0029] like Figure 5 As shown, 1. the upper die starts to move upward under the action of the punch slide; 2. at the same time, the inner forming block 57, the elastic slide rod 54, the push rod 53, the cushion block 52, and the top core of the nitrogen cylinder 51 remain motionless under the action of the nitrogen pressure.

[0030] like Figure 6As shown, 1. the upper die continues to move upward under the action of the punch press slide; 2. at the same time, the inner forming block 57, the elastic slide rod 54, the push rod 53, the cushion block 52, the top core of the nitrogen cylinder 51, and the inclined wedge 58 move upward together, and the product 100 is brought out under the action of the inner forming block 57 and the elastic slide rod 54 until it rises to the starting point on the punch press; 3. the product 100 wrapped on the inner forming block 57 is taken out by utilizing the elastic action of the product 100.

[0031] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of implementation of the present invention. That is, equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the specification should still fall within the scope covered by the patent of the present invention.

Claims

1. A precision inner undercut stamping die, characterized in that: It includes an upper die base, an upper die plate, a lower pad, a lower die base, a guide column, a guide sleeve, an upper forming component, and two sets of lower forming components; The upper die base is fixed to the upper die plate, the lower pad is fixed to the lower die base, a through hole for product positioning is opened in the middle of the lower pad and the lower die base, the upper end of the guide column is fixed to the upper die plate, the lower end of the guide column is movably inserted into the guide sleeve, and the guide sleeve is fixedly mounted on the lower pad; the upper forming assembly is mounted on the upper die plate, and the two groups of lower forming assemblies are mounted on the lower pad and arranged opposite to each other, the two groups of lower forming assemblies are located directly below the upper forming assembly, and a product processing position is formed between the two groups of lower forming assemblies; The upper forming assembly comprises a nitrogen cylinder, a cushion block, a push rod, an elastic sliding rod, an upper outer forming block, a slide rod latch, an inner forming block, and an inclined wedge; the cylinder body of the nitrogen cylinder is fixedly mounted on the upper die seat, the top core of the nitrogen cylinder passes through the cushion block and is connected to the upper end of the push rod, the cushion block is mounted in the upper die plate, the lower end of the push rod is inserted into the upper outer forming block and is connected to the upper end of the elastic sliding rod, the upper part of the elastic sliding rod is movably inserted into the upper outer forming block, and the slot on the upper part of the elastic sliding rod is slidably connected to the inner end of the slide rod latch, the outer end of the slide rod latch is fixed on the upper outer forming block, and the lower end of the elastic sliding rod is connected to the inner forming block; The lower forming component includes a spring seat plate, a slider seat, a slider, a slider spring, a spring screw, and a lower outer forming block; the spring seat plate is fixed on the lower pad, the slider seat is slidably connected to the lower pad, the spring screw gap passes through the spring seat plate from the outside to the inside and is connected to the outer end of the slider seat, the outer end of the slider is fixed to the inner end surface of the slider seat, the top inclined surface of the slider is opposite to the bottom inclined surface of the inclined wedge in the upper forming component and the bottom inclined surface of the inclined wedge can be pressed against the top inclined surface of the slider, driving the slider to move inward, the slider spring is sleeved on the outside of the spring screw and the two ends of the slider spring are respectively pressed against the spring seat plate and the pan head of the spring screw, the lower outer forming block is fixed to the inner end of the slider, and the lower outer forming blocks on the two groups of lower forming components constitute the outer forming surface of the product.

2. According to the precision inner undercut stamping die of claim 1, it is characterized in that: The lower end of the upper outer forming block is provided with a bell mouth.

3. The precision inner undercut stamping die according to claim 1, characterized in that: It also includes an upper pad and an upper supporting plate; the upper pad is connected between the upper die base and the upper supporting plate.

4. The precision inner undercut stamping die according to claim 1, characterized in that: It also includes a lower pad, a lower support plate, and a product positioning column; the lower pad is connected between the lower mold base and the lower support plate, and the lower end of the product positioning column is fixed on the lower support plate and is located directly below the through hole in the middle of the lower pad and the lower mold base, for placing the product.

5. The precision inner undercut stamping die according to claim 1, characterized in that: The upper template comprises an upper backing plate, an upper pad and an upper clamping plate; the upper backing plate, the upper pad and the upper clamping plate are fixed together in sequence.

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