Hardware stamping die

Abstract

The invention relates to the technical field of hardware stamping, in particular to a hardware stamping die which comprises a lower die body and an upper die body installed on the lower die body, a plurality of guide columns are arranged on the upper die body, the upper die body is connected with the lower die body through the guide columns, a slidable sliding part is arranged on the upper die body, and a folding assembly is arranged on the upper die body. A lower female die is arranged on the lower die, a die forming block is arranged on the lower female die, a groove is formed in the lower female die, and opening and closing of the sliding piece are controlled through the folding assembly, so that when the upper die moves downwards for stamping, the sliding piece is expanded outwards to shape a part, and when stamping is finished, the upper die moves upwards, and the sliding piece is gathered inwards, the part is automatically demoulded. And therefore, damage to the parts caused by manual knocking and mechanical knocking is avoided, and the yield of the stamped parts is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of hardware stamping, and particularly relates to a hardware stamping die. Background Art

[0002] Hardware stamping is a processing method that uses a die and stamping equipment to apply pressure to metal sheets, etc., causing them to undergo plastic deformation or separation, thereby obtaining parts or products with the required shape, size, and performance.

[0003] Conventional hardware stamping dies use the cooperation of a punch and a die to stamp and shape metal sheets. When the hardware parts are demolded, usually a manual knocking method is used to make the parts fall off, or the parts are ejected by setting ejector rods (i.e., ejector pins) in the stamping die. Both of these two methods are in direct contact with the parts. If the force of manual knocking and ejector rod ejection is too large, it is easy to leave indentations or local deformations on the surface of the parts, affecting the quality of the parts; if the force is too small, there will be a situation where the parts stick to the die.

[0004] Therefore, the present device proposes a hardware stamping die that does not require knocking the parts and can be automatically demolded. Summary of the Invention

[0005] According to the problems proposed in the background art, the present invention provides a hardware stamping die to solve, and the following further elaborates on the present invention.

[0006] A hardware stamping die includes a lower die, and an upper die installed on the lower die. The upper die is provided with a plurality of guide columns, and the upper die is connected to the lower die through the guide columns. The upper die is provided with a slidable sliding member, the upper die is provided with a folding assembly, the lower die is provided with a lower female die, the lower female die is provided with forming modules, and the lower female die is provided with grooves.

[0007] Preferably, a gear is rotatably connected to the upper die through a support rod. The upper die is provided with a telescopic frame. The telescopic frame is provided with a connecting member. The connecting member is provided with a first rack. The connecting member is provided with a folding assembly. The folding assemblies are all connected to the sliding member through cross bars. The support is provided with a second rack to realize the automatic expansion and gathering of the sliding member, facilitating the automatic falling off of the die.

[0008] Preferably, a magnet is provided on the telescopic frame, and a metal block is provided on the connecting member to realize that the sliding member always remains in a gathered state in the initial state.

[0009] Preferably, the support is provided with a receiving plate. The receiving plate is provided with an extrusion member. The extrusion member is provided with an inclined surface. The connecting member is provided with a guide rod. The receiving plate is slidably connected to the guide rod through a support ear. A first spring is compressed between the support ear and the connecting member, aiming to receive the falling sliding member.

[0010] Preferably, a buffer pad is provided on the receiving plate to reduce the contact stress between the part and the receiving plate and protect the integrity of the part.

[0011] Preferably, a double-acting cylinder is installed on the lower female die. A fixing member is provided on the double-acting cylinder. A column is provided on the fixing member. A sliding table is provided on the column. A second spring is compressed between the sliding table and the fixing member. A plurality of guiding members are provided on the lower female die. A curved slideway is provided on the guiding member. A sliding rod is provided in the slideway. The sliding rod is connected to the sliding table. A sliding frame is provided on the sliding rod. A centering plate is provided on the sliding frame. A third spring is provided between the centering plate and the sliding frame to achieve longitudinal centering of the part.

[0012] Preferably, a plurality of sliding columns are provided on the lower die. A buffer member is provided on the sliding column. A fourth spring is provided between the buffer member and the lower die, aiming to achieve directional movement and buffering of the upper die through the buffer member.

[0013] Beneficial effects: Compared with the prior art, in the present invention, through the meshing of the gear and the second rack, and the telescopic movement of the first rack, the telescopic movement of the connecting member and the telescopic frame, the folding assembly is linked to open and close, and then drives the sliding member to open and close, realizing automatic demoulding of the part without the need for knocking, ensuring the integrity of the part after stamping; through the cooperation of the magnet and the metal block, in the initial state, the two sliding members are kept gathered, and after stamping, they return to the gathered state, facilitating subsequent recycling; through the extrusion cooperation of the guiding column and the extrusion member, the receiving plate is avoided, allowing the sliding member to move downward smoothly for stamping, and driven by the first spring, the two receiving plates are reset to receive the demoulded part; through the double-acting cylinder driving the fixing member to move, the sliding rod moves in the slideway of the guiding member, and the sliding table, the sliding frame and the centering plate are linked and squeeze the front and rear ends of the part to adjust the longitudinal offset of the part, achieving the effect of longitudinal centering of the part, thereby ensuring the stamping effect of the part and improving the yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 : Three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 : Structural schematic diagram of the related components for sliding the two sliding members of the present invention;

[0016] Figure 3 : Structural schematic diagram of the folding assembly, the first rack and the connecting member and other components of the present invention;

[0017] Figure 4 : Structural schematic diagram of the related components for receiving the automatically demoulded part of the present invention;

[0018] Figure 5 : Structural schematic diagram of the related components for longitudinally centering the part of the present invention;

[0019] In the figure: 1 - lower die, 11 - upper die, 101 - lower female die, 102 - support rod, 103 - bracket, 104 - forming module, 12 - guide post, 13 - buffer member, 131 - sliding post, 132 - fourth spring, 2 - sliding member, 21 - gear, 22 - first rack, 23 - telescopic frame, 231 - connecting member, 2311 - guide rod, 24 - folding assembly, 25 - magnet, 251 - metal block, 26 - second rack, 3 - receiving plate, 301 - support ear, 31 - extrusion member, 32 - first spring, 33 - buffer pad, 4 - guiding member, 401 - sliding rod, 41 - sliding frame, 42 - centering plate, 43 - double - acting cylinder, 44 - fixing member, 441 - column, 442 - sliding table, 45 - second spring, 46 - third spring. Specific embodiments

[0020] Next, in combination with the attached Figure 1 - attached Figure 5 A specific embodiment of the present invention will be elaborated in detail.

[0021] Referring to the attached Figures 1 - 5 , a metal stamping die includes a lower die 1 and an upper die 11 installed above the lower die 1. Four guide posts 12 are fixedly connected to the bottom of the upper die 11, and the upper die 11 is connected to the lower die 1 through the four guide posts 12. Two sliding members 2 are slidably connected to the upper die 11, and the two sliding members 2 form an upper punch structure. The automatic demolding effect of the part is realized by the sliding action of the two sliding members 2 in this device.

[0022] A lower female die 101 is installed on the lower die 1. Two forming modules 104 are fixedly connected to the lower female die 101. There are grooves on the lower female die 101, and the two forming modules 104 are respectively placed on the left and right sides of the grooves on the lower female die 101, aiming to perform stamping and shaping on the part through the extrusion cooperation of the grooves of the lower female die 101, the forming modules 104 and the two sliding members 2.

[0023] A metal sheet (hereinafter collectively referred to as: part) is placed on the top of the forming module 104. The stamping machine is started to drive the upper die 11 to move downward. The two sliding members 2 squeeze and press the part into the grooves of the lower female die 101. The two side walls of the part are formed by the extrusion of the forming module 104 and are stabilized on the two sliding members 2.

[0024] According to the above, the automatic demolding effect of this device is realized through the sliding action of the two sliding members 2. Specifically: A gear 21 is rotatably connected to the upper die 11 through a support rod 102. A telescopic frame 23 is fixedly connected to the upper die 11. The telescopic part of the telescopic frame 23 is fixedly connected to a connecting member 231. A first rack 22 is fixedly connected to the connecting member 231. Two folding assemblies 24 are provided on the connecting member 231. For specific reference, refer to the attached Figure 3, the folding assembly 24 is composed of two short rods and a rotating shaft. The two short rods are rotatably connected to the rotating shaft. One end of the folding assembly 24 is fixedly connected to the end of the connecting member 231, and the other end of the folding assembly 24 is rotatably connected to the bottom of the connecting member 231.

[0025] The folding assemblies 24 are fixedly connected to the adjacent sliding members 2 through cross bars. The telescopic frame 23, the connecting member 231 and the two folding assemblies 24 form a telescopic link structure, aiming to drive the two folding assemblies 24 to gather together by the upward movement of the connecting member 231, and drive the two folding assemblies 24 to expand by the downward movement of the connecting member 231). Both ends of the lower female die 101 are fixedly connected with brackets 103, and second racks 26 are fixedly connected to the brackets 103. The first rack 22 and the second rack 26 can both mesh with the gear 21.

[0026] Four sliding columns 131 are fixedly connected to the lower die 1. A buffer member 13 is slidably connected to the sliding columns 131. A fourth spring 132 is compressed between the buffer member 13 and the lower die 1, aiming to make the guide post 12 move downward in a fixed direction through the buffer member 13 and play a role of buffering and protecting.

[0027] Initially, the telescopic end of the telescopic frame 23 is in a contracted state. The two folding assemblies 24 are gathered together. The two sliding members 2 are gathered together and do not slide out of the upper die 11. As the upper die 11 moves downward, the guide post 12 presses the buffer member 13, and the fourth spring 132 deforms. The gear 21 moves downward and contacts and meshes with the second rack 26. The gear 21 rotates, and then the first rack 22 meshes with the gear 21. The first rack 22 moves downward, and the connecting member 231 and the telescopic part of the telescopic frame 23 are both controlled to move downward. The two folding assemblies 24 expand to both sides, driving the two sliding members 2 to slide and expand to both sides. The two sliding members 2 press the parts and just fit into the grooves of the lower female die 101. After the two sliding members 2 slide and expand to both sides, the side walls protrude from the side wall of the upper die 11. Once the parts are stamped, flanges are formed at both ends and are clamped at the protruding parts of the two sliding members 2.

[0028] After stamping, the upper die 11 moves upward. The gear 21 moves upward and meshes with the second rack 26 again. The gear 21 rotates in reverse, and then the first rack 22 meshes with the gear 21 again. The first rack 22 moves upward, and the connecting member 231 is controlled to move upward. The telescopic part of the telescopic frame 23 is controlled to move upward and contract. The two folding assemblies 24 gather together to both sides, driving the two sliding members 2 to slide and gather together in opposite directions, restoring to the initial state. As the sliding members 2 slide and gather together in opposite directions, the protruding parts of the sliding members 2 and the upper die 11 disappear, creating a gap between the sliding members 2 and the parts. The parts are automatically demolded by their own gravity, thus avoiding the indentation and damage to the parts caused by the demolding methods of manual knocking or mechanical ejection.

[0029] According to the above, before stamping, in order to ensure that the two folding components 24 are gathered together and the two sliding parts 2 are in a gathered state, the following settings are made: a magnet 25 is provided on the fixed part of the telescopic frame 23, and a metal block 251 is provided on the connecting part 231, so that before stamping, the telescopic part of the telescopic frame 23 is kept in a contracted state through the force generated by the magnet 25 and the metal block 251, so that the two folding components 24 are kept gathered together, and the two sliding parts 2 are kept in a gathered state synchronously, and as the gear 21 moves up and meshes with the second rack 26, the first rack 22 moves down and generates a downward pulling force on the connecting part 231, and this downward pulling force is greater than the force between the magnet 25 and the metal block 251, and the connecting part 231 can move down smoothly.

[0030] After the stamping is completed, the parts are automatically demoulded and fall down. In order to facilitate the receiving of the falling parts, the device is implemented through a receiving assembly: the bracket 103 is slidably connected with a receiving plate 3, and both ends of the receiving plate 3 are fixedly connected with an extrusion piece 31 through a short rod. The extrusion piece 31 is provided with an inclined surface, and the connecting piece 231 is fixedly connected with a guide rod 2311. The bottom of the receiving plate 3 is slidably connected to the guide rod 2311 through a support ear 301. A first spring 32 is compressed between the support ear 301 and the connecting piece 231, and the first spring 32 is wound around the guide rod 2311.

[0031] Initially, the two receiving plates 3 are located above the top of the lower die 101. The two receiving plates 3 form a receiving platform that can smoothly receive the falling parts. As the upper die 11 moves downward, the guide column 12 first contacts and squeezes the extrusion piece 31. Based on the setting of the inclined surface on the extrusion piece 31, the two extrusion pieces 31 move away from each other due to the extrusion, and the two ears 301 and the two receiving plates 3 are controlled to move away from each other. The first spring 32 is deformed, thereby realizing the avoidance action of the two receiving plates 3, so that the upper die 11 moves down smoothly to form the die. After the stamping is completed, as the upper die 11 moves upward, the guide column 12 and the extrusion piece 31 are released from extrusion. Under the action of the first spring 32, the two ears 301 are driven to reset and move, and the two receiving plates 3 are controlled to reset and move, and then receive the automatically demolded parts.

[0032] Taking into account that the parts fall after stamping and directly contact the receiving plate 3, there is a possibility that the parts will be deformed due to the impact force, so the following improvements are made; a buffer pad 33 is provided on the receiving plate 3, and the buffer pad 33 is made of elastic material, aiming to reduce the contact stress between the parts and the receiving plate 3 and protect the integrity of the parts.

[0033] When the part to be processed is placed on the forming module 104, the part is not properly positioned, resulting in a longitudinal offset, and then an asymmetric stamping force, which leads to an increase in the rejection rate. Based on this, the device solves this problem through an adjustment component: double-axis cylinders 43 are installed on the left and right side walls of the lower die 101. Fixed parts 44 are fixedly connected to the two output shafts of the double-axis cylinders 43. The fixed parts 44 are fixedly connected to columns 441. Slide tables 442 are slidably connected to the columns 441. Second springs 45 are compressed between the slide tables 442 and the fixed parts 44.

[0034] A total of four guiding parts 4 are fixedly connected to the front and rear side walls of the lower die 101. The four guiding parts 4 are distributed in pairs. For specific reference, please refer to the appendix Figure 5 , and curved slideways are provided on the guiding parts 4. Slide rods 401 are slidably connected in the slideways. One end of each slide rod 401 is fixedly connected to the adjacent slide table 442, aiming to drive the slide table 442 to move through the slide rod 401. The mutually approaching ends of the two slide rods 401 are jointly fixedly connected to a sliding frame 41. That is, sliding frames 41 are distributed on the front and rear sides of the lower die 101. Centering plates 42 are slidably connected to the sliding frames 41. Third springs 46 are compressed between the centering plates 42 and the sliding frames 41.

[0035] At first, the slide rods 401 are located at the bottom of the curved slideways on the guiding parts 4. When the part to be processed is placed on the forming module 104, the double-axis cylinders 43 are started, driving the fixed parts 44 to extend outwards. Due to the existence of the guiding parts 4, the slide rods 401 move upwards in the curved slideways of the guiding parts 4 until they reach the top of the curved slideways of the guiding parts 4. The slide tables 442 are controlled to move upwards on the columns 441. The sliding frames 41 and the centering plates 42 are controlled to move and squeeze the front and rear ends of the part, adjusting the longitudinal offset of the part and achieving the effect of centering the part. The second springs 45 and the third springs 46 deform.

[0036] Due to the existence of the third springs 46, the centering plates 42 produce a centering effect on the part and at the same time produce a buffering effect on the part, avoiding the centering plates 42 exerting an excessive squeezing force on the part and causing the part to deform. In addition, the cooperation of the third springs 46 and the centering plates 42 can adapt to parts of different sizes.

[0037] After the centering adjustment action is completed, by starting the double-axis cylinders 43, driving the fixed parts 44 to contract inwards, the slide rods 401 move downwards and reset in the curved slideways of the guiding parts 4 until they reach the bottom of the curved slideways of the guiding parts 4. The centering plates 42 are separated from the extrusion of the part and reset and move under the action of the third springs 46. The slide tables 442 are controlled to move downwards and reset on the columns 441. Thus, the adjustment component returns to the initial state, facilitating the next round of cyclic use.

[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A metal stamping die, comprising a lower die (1), and an upper die (11) mounted on the lower die (1), characterized in that: The upper mold (11) is provided with a plurality of guide columns (12), the upper mold (11) is connected to the lower mold (1) via the guide columns (12), the upper mold (11) is provided with a slidable sliding member (2), the upper mold (11) is provided with a folding assembly (24), the lower mold (11) is provided with a lower concave mold (101), the lower concave mold (101) is provided with a forming module (104), and the lower concave mold (101) is provided with a groove.

2. The metal stamping die according to claim 1, characterized in that: The upper mold (11) is rotatably connected to a gear (21) via a support rod (102); a telescopic frame (23) is provided on the upper mold (11); a connecting piece (231) is provided on the telescopic frame (23); a first rack (22) is provided on the connecting piece (231); a folding assembly (24) is provided on the connecting piece (231); the folding assembly (24) is connected to the sliding member (2) via a cross bar; and a second rack (26) is provided on the bracket (103).

3. The metal stamping die according to claim 1, characterized in that: The telescopic frame (23) is provided with a magnet (25), and the connecting piece (231) is provided with a metal block (251).

4. The metal stamping die according to claim 1, characterized in that: The bracket (103) is provided with a receiving plate (3), the receiving plate (3) is provided with an extrusion piece (31), the extrusion piece (31) is provided with an inclined surface, the connecting piece (231) is provided with a guide rod (2311), the receiving plate (3) is slidably connected to the guide rod (2311) through a support ear (301), and a first spring (32) is compressed between the support ear (301) and the connecting piece (231).

5. The metal stamping die according to claim 1, characterized in that: A buffer pad (33) is provided on the receiving plate (3).

6. The metal stamping die according to claim 1, characterized in that: A double-axis cylinder (43) is installed on the lower concave mold (101), and a fixing part (44) is provided on the double-axis cylinder (43), and a column (441) is provided on the fixing part (44), and a slide (442) is provided on the column (441), and a second spring (45) is compressed between the slide (442) and the fixing part (44), and a plurality of guide members (4) are provided on the lower concave mold (101), and a curved slide is provided on the guide member (4), and a sliding rod (401) is provided in the slide, and the sliding rod (401) is connected to the slide (442), and a sliding frame (41) is provided on the sliding rod (401), and a centering plate (42) is provided on the sliding frame (41), and a third spring (46) is provided between the centering plate (42) and the sliding frame (41).

7. The metal stamping die according to claim 1, characterized in that: The lower mold (1) is provided with a plurality of slide columns (131), a buffer component (13) is provided on the slide column (131), and a fourth spring (132) is provided between the buffer component (13) and the lower mold (1).

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