Forming die with upper die band preloading spring

Abstract

The utility model belongs to cold punch die technical field especially is a kind of forming die of upper die with pre-press spring, including upper die holder body, lower die material pressing body and forming piece, the upper die holder body is fixedly connected with male die in, four material pressing nitrogen gas springs are equipped on the upper die holder body, material pressing nitrogen gas spring top and the lower die material pressing body profile are contacted, four plane areas corresponding to four material pressing nitrogen gas springs are respectively equipped on the forming piece;Plate material is tightly pressed on lower die material pressing body by material pressing nitrogen gas spring force, since material pressing nitrogen gas spring presses plate material on lower die material pressing body, when male die both ends contact plate material, plate material forming piece also will not arch, will not separate from locating pin, realize accurate positioning, after lower die material pressing body release stroke, upper die continues to move upward, material pressing nitrogen gas spring gradually releases compression amount, and workpiece is ejected from male die, plays the role of material ejecting, realizes upper die material pressing function, saves cost, and lightens assembly workload.

Description

Technical Field

[0001] This utility model belongs to the field of cold stamping die technology, specifically relating to a forming die with a pre-compression spring on the upper die. Background Technology

[0002] For a type of stamped part with added beams, the process design aims to improve material utilization by including blanking and forming processes. During the design of the forming die, a blanking or supporting component is often required to achieve the functions of blanking or unloading. In the forming process, to shape the top of the part and hold it in place for flanging on both sides, a blanking body component is often needed. This blanking body component contacts the die and punch before the die, allowing the top of the part to be formed first and holding it in place for the subsequent flanging. To ensure consistent part condition and accurate placement of the sheet metal on the blanking body, two positioning holes need to be pre-filled before blanking, and positioning pins need to be designed on the forming blanking body.

[0003] The locating pins are usually set at a low height for the convenience of workers to pick up the parts. The two ends of this type of beam are lower than the middle surface, and the top surface is roughly shaped like a "Z". During the forming process of the punch and the blank holder, the lowest point of the two end inserts contacts the sheet metal first, causing the sheet metal to arch up and detach from the locating pins. The locating pins then fail to function and cannot guarantee the consistency of the part's condition. Utility Model Content

[0004] This utility model provides a forming mold with a pre-compression spring on the upper die, which can achieve precise positioning. After the lower die pressing body releases its stroke, the upper die continues to move upward, and the pressing nitrogen spring gradually releases its compression, pushing the workpiece out of the punch and playing the role of ejecting the material. This realizes the pressing function of the upper die, saves costs, and reduces the workload of assembly.

[0005] This utility model provides the following technical solution: a forming mold with a pre-compression spring on the upper mold, comprising an upper mold base body, a lower mold pressing body, and a forming part. A punch is fixedly connected inside the upper mold base body. Four pressing nitrogen springs are provided on the upper mold base body. The top of the pressing nitrogen springs contacts the profile surface of the lower mold pressing body. The forming part is provided with four planar areas corresponding to the four pressing nitrogen springs respectively. When the pressing nitrogen springs are released and not under pressure, the top of the pressing nitrogen springs is higher than the surface of the punch.

[0006] The nitrogen spring for pressing material is fixedly mounted with a fixing plate on its outer side, and the fixing plate is fixedly connected to the upper mold base body.

[0007] The lower die pressing body is fixedly connected with a positioning pin, which is inserted into the punch.

[0008] The punch has a positioning hole, and the positioning pin is inserted into the positioning hole.

[0009] The top of the molded part is pressed onto the lower die pressing body by one end of the pressing nitrogen spring.

[0010] The upper mold base body moves toward the lower mold pressing body, and the top of the pressing nitrogen spring contacts the molded part before the convex mold surface.

[0011] The beneficial effects of this utility model are: In the open mold state, the top of the nitrogen spring extends a certain distance from the face of the punch. When the mold begins to close, the top of the nitrogen spring contacts the sheet metal before the face of the punch. The nitrogen spring force presses the sheet metal tightly onto the lower die's pressure body. Then the punch contacts the sheet metal. Because the nitrogen spring presses the sheet metal onto the lower die's pressure body, the sheet metal will not arch or detach from the locating pin when the two ends of the punch contact the sheet metal, achieving precise positioning and ensuring the consistency of the part's state. After the lower die's pressure body releases its stroke, the upper die continues to move upward, and the nitrogen spring gradually releases its compression, ejecting the part from the punch and playing the role of ejecting material. This realizes the upper die's pressure function, saves costs, and reduces assembly workload.

[0012] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 For the present utility model Figure 2 Enlarged view of point A; Figure 4 This is a top view of the present invention; Figure 5 This is a schematic diagram of the nitrogen spring distribution in the pressure material of this utility model; In the figure: 1. Upper mold base body; 2. Punch; 21. Positioning hole; 3. Pressure material nitrogen spring; 4. Fixing plate; 5. Lower mold pressure material body; 51. Positioning pin; 6. Molded part; 61. Planar area. Detailed Implementation

[0014] Please see Figure 1 - Figure 5The present invention provides the following technical solution: including an upper mold base body 1, a lower mold pressing body 5 and a forming part 6. A punch 2 is fixedly connected inside the upper mold base body 1. Four pressing nitrogen springs 3 are provided on the upper mold base body 1. The top of the pressing nitrogen springs 3 is in contact with the profile of the lower mold pressing body 5. The forming part 6 is provided with four planar areas 61 corresponding to the four pressing nitrogen springs 3 respectively. When the pressing nitrogen springs 3 are released and not under pressure, the top of the pressing nitrogen springs 3 is higher than the profile of the punch 2.

[0015] In this implementation scheme: the upper mold base body 1 can move up and down, which is existing technology. When the punch 2 approaches the lower mold pressing body 5 to form a sheet metal forming part 6, the upper mold base body 1 is provided with four pressing nitrogen springs 3. The top of the pressing nitrogen springs 3 contacts the surface of the lower mold pressing body 5. The forming part 6 is provided with four planar areas 61 corresponding to the four pressing nitrogen springs 3 respectively. The pressing nitrogen springs 3 are designed on the top surface of the part near the planar part. The pressing nitrogen springs 3 are model X320-125. In the mold open state, the top of the pressing nitrogen springs 3 extends a certain distance beyond the surface of the punch 2. When the mold begins to close, the top of the pressing nitrogen springs 3 contacts the sheet metal before the surface of the punch 2. The pressing nitrogen springs 3 hold the sheet metal tightly. The sheet metal is pressed onto the lower die pressing body 5, and then the punch 2 contacts the sheet metal. Because the pressing nitrogen spring 3 presses the sheet metal onto the lower die pressing body 5, both ends 2 of the punch contact the sheet metal, and the sheet metal forming part 6 will not arch up or come off the positioning pin 51, thus achieving precise positioning. When the upper die pressing nitrogen spring 3 is released and not under pressure, its top is higher than the surface of the punch 2. When the mold is open, the upper die pressing nitrogen spring 3 gradually releases its stroke, and finally the pressing nitrogen spring 3 is higher than the surface of the punch 2, which plays the role of ejecting the material and preventing the part from getting stuck on the punch 2. After the lower die pressing body 5 releases its stroke, the upper die continues to move upward, and the pressing nitrogen spring 3 gradually releases its compression, ejecting the part from the punch 2. This realizes the upper die pressing function, saves costs, and reduces the amount of assembly work.

[0016] A fixing plate 4 is fixedly installed on the outside of the pressure nitrogen spring 3, and the fixing plate 4 is fixedly connected to the upper mold base body 1. The upper mold pressure function is realized by four pressure nitrogen springs 3. Pressure nitrogen springs 3 are designed under the punch 2 on the upper mold base body 1 near the plane part of the top surface of the part. Four pressure nitrogen springs 3 are designed at this position. In the mold open state, the top of the pressure nitrogen spring 3 extends a certain distance out of the punch 2 profile. When the mold begins to close, the top of the pressure nitrogen spring 3 contacts the sheet material before the punch 2 profile.

[0017] A positioning pin 51 is fixedly connected to the lower die pressing body 5. The positioning pin 51 is inserted into the punch 2. The punch 2 has a positioning hole 21, and the positioning pin 51 is inserted into the positioning hole 21. By fixing four pressing nitrogen springs 3 to the upper die base body 1, the upper die pressing function is realized. This avoids the need for elastic elements, guide elements, limit elements, etc. in the pressing body under normal circumstances, saving costs and reducing assembly workload. The sheet metal forming part 6 will not arch up and will not detach from the positioning pin 51, thus achieving precise positioning. At the top of the molded part 6, one end of the pressure nitrogen spring 3 presses it onto the lower die pressure body 5. The upper die base body 1 moves toward the lower die pressure body 5. The top of the pressure nitrogen spring 3 contacts the molded part 6 before the surface of the punch 2. When the upper die pressure nitrogen spring 3 is released and not under pressure, its top is higher than the surface of the punch 2. When the mold is open, the upper die pressure nitrogen spring 3 gradually releases its stroke. Finally, the pressure nitrogen spring 3 is higher than the surface of the punch 2, which plays the role of ejecting material and preventing the molded part from getting stuck on the punch 2.

[0018] The working principle and usage process of this utility model: The top of the pressure nitrogen spring 3 contacts the surface of the lower die pressure body 5. The forming part 6 has four planar areas 61 corresponding to the four pressure nitrogen springs 3 respectively. The pressure nitrogen springs 3 are designed on the near-planar part of the top surface of the part. In the open state, the top of the pressure nitrogen spring 3 extends a certain distance beyond the surface of the punch 2. When the mold begins to close, the top of the pressure nitrogen spring 3 contacts the sheet metal before the surface of the punch 2, and the sheet metal is tightly pressed by the force of the pressure nitrogen spring 3. The lower die presses the sheet metal onto the lower die presser body 5, and then the punch 2 contacts the sheet metal. At the top of the formed part 6, because the nitrogen spring 3 presses the sheet metal onto the lower die presser body 5, the sheet metal formed part 6 will not arch up or come off the positioning pin 51 when the two ends of the punch 2 contact the sheet metal, thus achieving precise positioning. After the lower die presser body 5 releases its stroke, the upper die continues to move upward, and the nitrogen spring 3 gradually releases its compression, pushing the part out of the punch 2, thus playing the role of ejecting the material. This realizes the upper die pressing function, saves costs, and reduces the workload of assembly.

Claims

1. A forming die with a preloaded spring on the upper die, comprising an upper die base body (1), a lower die pressing body (5), and a forming part (6), wherein a punch (2) is fixedly connected inside the upper die base body (1), characterized in that: The upper mold base body (1) is provided with four pressure nitrogen springs (3). The top of the pressure nitrogen springs (3) is in contact with the profile of the lower mold pressure body (5). The forming part (6) is provided with four planar areas (61) corresponding to the four pressure nitrogen springs (3). When the pressure nitrogen springs (3) are released and not under pressure, the top of the pressure nitrogen springs (3) is higher than the profile of the punch (2).

2. The forming mold with a preloaded spring on the upper die according to claim 1, characterized in that: A fixing plate (4) is fixedly installed on the outside of the pressure nitrogen spring (3), and the fixing plate (4) is fixedly connected to the upper mold base body (1).

3. A forming die with a preloaded spring on the upper die according to claim 1, characterized in that: A positioning pin (51) is fixedly connected to the lower die pressing body (5), and the positioning pin (51) is inserted into the punch (2).

4. A forming mold with a preloaded spring on the upper die according to claim 3, characterized in that: The punch (2) has a positioning hole (21), and the positioning pin (51) is inserted into the positioning hole (21).

5. A forming die with a preloaded spring on the upper die according to claim 1, characterized in that: By applying pressure to the top position of the molded part (6) at one end of the pressure nitrogen spring (3), the top position of the molded part (6) can be pressed onto the lower die pressure body (5).

6. A forming die with a preloaded spring on the upper die according to claim 1, characterized in that: The upper mold base body (1) moves toward the lower mold pressing body (5), and the top of the pressing nitrogen spring (3) contacts the molded part (6) before the surface of the punch (2).

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