Small-corner-collapse part extrusion forming device

Abstract

The utility model discloses a small corner collapse part extrusion forming device which comprises an upper die base and a lower die base, an upper cushion block is arranged on the side, close to the lower die base, of the upper die base, a discharging block is arranged on the side, close to a female die block, of a fixing plate, and a height limiting plate is further arranged between the fixing plate and the discharging block. A female die cavity is formed in the female die block, a material lifting block is arranged in the female die cavity, a to-be-machined part is arranged on the material lifting block, during extrusion forming, the to-be-machined part is tightly pressed by the discharging insert and the material lifting block, and the discharging insert drives the to-be-machined part to move towards the stress gasket; when parts with different sizes and thicknesses are processed, the matching positions of the to-be-processed part and the extrusion lower male die can be correspondingly adjusted, so that the forming die holder which is flexibly adjusted is realized, the flexibility and the quality of processing the fillet surface of the part are improved, the blanking collapse angle of the part is reduced in the production process, and the product performance of the part is further improved.

Description

Technical Field

[0001] This utility model relates to the field of punching and extrusion technology, and in particular to an extrusion forming device for small corner-collapsed parts. Background Technology

[0002] Blanking is a stamping process. Currently, high-precision metal parts are mainly produced by a single blanking operation to achieve the required dimensions, with some requiring a two-stage blanking process. To address this issue, Chinese patent application CN202321695942.7 discloses a blanking structure and blanking equipment, which completes the blanking and stamping process through the cooperation of a first die and a second die. However, this solution has the drawback of being inconvenient for processing rounded corners. In order to reduce the collapse of the rounded corners and improve product performance, a process of rough cutting → extrusion → fine cutting is generally adopted. Therefore, a device is needed that can process rounded corners on parts of different sizes and thicknesses. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a small corner extrusion molding device, which improves the flexibility and quality of processing the rounded corners of parts by setting a molding die base that can be flexibly adjusted.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] This utility model provides an extrusion molding device for small-corner parts, including an upper die base and a lower die base. An upper pad is provided on the side of the upper die base near the lower die base, and a lower pad is provided on the side of the lower die base near the upper die base. A recessed module is also provided on the lower pad. A fixing plate is provided on the side of the upper pad near the recessed module, and a stripper block is provided on the side of the fixing plate near the recessed module. A height limiting plate is also provided between the fixing plate and the stripper block. A die cavity is provided inside the recessed module, and a lifting block is provided inside the die cavity. A stripper insert that cooperates with the lifting block is provided inside the stripper block. A force-bearing pad is fixed at the bottom of the die cavity. A ejector mechanism is provided at the end of the lower die base near the force-bearing pad to drive the lifting block toward the stripper insert. The force-bearing pad is connected to the ejector mechanism. The opposite end of the structure has several fixing grooves that cooperate with the lifting block, and the fixing grooves are linearly arranged on the force-bearing pad. The lifting block has several sliding holes that cooperate with the fixing grooves. The axis of the sliding holes is perpendicular to the force-bearing pad. A lower extrusion punch is slidably connected in the sliding holes. The bottom of the lower extrusion punch is fixedly connected to the fixing grooves. The lower extrusion punch is made of SKH-9 high-speed tool steel and is coated with a surface coating. The surface coating is a titanium carbide coating with a unit thickness of 0.002-0.003 mm. The lifting block has a part to be processed. During extrusion molding, the unloading insert and the lifting block press the part to be processed together. The unloading insert drives the part to be processed to move towards the force-bearing pad.

[0006] The ejector mechanism includes an ejector spring and an ejector rod. The lower mold base has an ejector cavity that cooperates with the ejector spring. An ejector pad is fixedly provided at one end of the ejector rod near the ejector spring. The ejector rod is coaxially arranged with the ejector cavity. A throat plug is fixedly provided at the bottom of the ejector cavity. One end of the ejector spring is fixedly connected to the throat plug, and the other end is fixedly connected to the ejector pad.

[0007] The beneficial effects of this utility model are as follows:

[0008] When dealing with parts of different sizes and thicknesses, this invention allows for the adjustment of the mating position between the part to be processed and the extrusion punch, thereby achieving a flexible forming die base. This improves the flexibility and quality when processing rounded corners of the parts, reduces the blanking collapse corners during production, and ultimately enhances the product performance of the parts. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the principle structure of an extrusion molding device for small collapsed corner parts provided in a specific embodiment of this utility model;

[0010] In the picture:

[0011] 1. Upper mold base; 11. Upper pad block; 12. Fixing plate; 13. Ejection mechanism; 14. Height limit plate;

[0012] 131. Ejector spring; 132. Ejector rod; 133. Ejector cavity; 1321. Ejector gasket; 134. Throat plug;

[0013] 2. Lower mold base; 21. Lower pad block;

[0014] 3. Concave module; 31. Concave mold cavity; 32. Force-bearing pad; 321. Fixing groove;

[0015] 4. Unloading block; 41. Unloading insert;

[0016] 5. Lifting block; 51. Sliding hole;

[0017] 6. Extruding the lower punch;

[0018] 7. Parts to be processed. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] As shown in the figure, this utility model provides an extrusion molding device for small-corner parts, including an upper die base 1 and a lower die base 2. An upper pad 11 is provided on the side of the upper die base 1 near the lower die base 2, and a lower pad 21 is provided on the side of the lower die base 2 near the upper die base 1. A recessed module 3 is also provided on the lower pad 21. A fixing plate 12 is provided on the side of the upper pad 11 near the recessed module 3, and a stripping block 4 is provided on the side of the fixing plate 12 near the recessed module 3. A height limiting plate 14 is also provided between the fixing plate 12 and the stripping block 4. This allows for adjustment of the thickness of the height limiting plate 14 to achieve the best extrusion effect when dealing with parts 7 of different thicknesses. A die cavity 31 is provided inside the recessed module 3, and a lifting block 5 and a stripping block are provided inside the die cavity 31. The die 4 is equipped with a material ejector insert 41 that cooperates with the lifting block 5. A force-bearing pad 32 is also fixedly installed at the bottom of the die cavity 31. The lower die base 2 has an ejector mechanism 13 at one end near the force-bearing pad 32, which drives the lifting block 5 towards the material ejector insert 41. Specifically, the ejector mechanism 13 includes an ejector spring 131 and an ejector rod 132. The lower die base 2 has an ejector cavity 133 that cooperates with the ejector spring 131. An ejector pad 1321 is fixedly installed at one end of the ejector rod 132 near the ejector spring 131. The ejector rod 132 and the ejector cavity 133 are coaxially arranged. A throat plug 134 is fixedly installed at the bottom of the ejector cavity 133. One end of the ejector spring 131 is fixedly connected to the throat plug 134, and the other end is fixedly connected to the ejector pad 1321. On the opposite end of the pad 32, opposite to the ejector mechanism 13, are several fixing grooves 321 that cooperate with the lifting block 5. These fixing grooves 321 are linearly arranged on the pad 32. The lifting block 5 has several sliding holes 51 that cooperate with the fixing grooves 321. The axis of the sliding holes 51 is perpendicular to the pad 32. A lower extrusion punch 6 is slidably connected to the sliding holes 51. The bottom of the lower extrusion punch 6 is fixedly connected to the fixing grooves 321. The fixed connection can be either a plug-in connection or a snap-fit ​​connection. Thus, when dealing with parts of different sizes and thicknesses, the mating position of the workpiece 7 and the lower extrusion punch 6 can be adjusted accordingly to achieve a flexible forming die base, thereby improving the machining of rounded corner surfaces of the workpiece. Flexibility and quality are improved during the production process, which reduces the blanking collapse angle of the parts and thus improves the product performance of the parts. The lifting block 5 is equipped with the part to be processed 7. During extrusion molding, the unloading insert 41 and the lifting block 5 press the part to be processed 7. That is, under the action of the ejector spring 131, the ejector rod 132 lifts the lifting block 5. During the lifting, since the ejector rod 132 and the extrusion punch 6 are located at the two ends of the lifting block 5, the ejector rod 132 and the extrusion punch 6 play a limiting and guiding role on the movement of the lifting block 5. This allows the lifting block 5 to be lifted smoothly. At the same time, the unloading insert 41 presses down. In this way, the unloading insert 41 and the lifting block 5 together clamp the part to be processed 7. Then the unloading insert 41 continues to press down.The unloading insert 41 moves the workpiece 7 towards the force-bearing pad 32, thus the end of the workpiece 7 that is in contact with the extrusion punch 6 is reverse-extruded, ultimately forming the part. The movement of the workpiece 7 towards the force-bearing pad 32 by the unloading insert 41 is driven by a motor, cylinder, or other driving device (not shown in the figure).

[0021] Preferably, in order to ensure and improve the extrusion molding effect, the extrusion punch 6 is made of SKH-9 high-speed tool steel; the extrusion punch 6 is coated with a surface coating, which is a titanium carbide coating, and the unit thickness of the surface coating is 0.002-0.003mm.

[0022] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. A small-corner extrusion molding device for parts, comprising an upper die base (1) and a lower die base (2), wherein an upper pad (11) is provided on the side of the upper die base (1) near the lower die base (2), and a lower pad (21) is provided on the side of the lower die base (21) near the upper die base (1). A recessed module (3) is also provided on the lower pad (21). A fixing plate (12) is provided on the side of the upper pad (11) near the recessed module (3). A material unloading block (4) is provided on the side of the fixing plate (12) near the recessed module (3). A cavity (31) is provided inside the cavity (3), and a lifting block (5) is provided inside the cavity (31). The device is characterized in that: The unloading block (4) is provided with an unloading insert (41) matched with the lifting block (5), the bottom of the concave die cavity (31) is further provided with a stress gasket (32), the lower die seat (2) is provided with a material lifting mechanism (13) driving the lifting block (5) to move towards the unloading insert (41) at one end close to the stress gasket (32), a plurality of fixing grooves (321) matched with the lifting block (5) are formed in the other end of the stress gasket (32) opposite to the material lifting mechanism (13), a plurality of sliding holes (51) matched with the fixing grooves (321) are formed in the lifting block (5), the axis direction of the sliding hole (51) is perpendicular to the stress gasket (32), an extrusion lower punch (6) is slidably connected in the sliding hole (51), and the bottom of the extrusion lower punch (6) is fixedly connected with the fixing groove (321). The lifting block (5) is provided with a part to be processed (7), the unloading insert (41) and the lifting block (5) press the part to be processed (7) tightly during extrusion forming, and the unloading insert (41) drives the part to be processed (7) to move towards the stress gasket (32).

2. The small-angle part extrusion forming device according to claim 1, characterized in that: The plurality of fixing grooves (321) are linearly arranged on the stress gasket (32).

3. The small-angle part extrusion forming device according to claim 1, characterized in that: The material of the extrusion lower punch (6) is SKH-9 high-speed tool steel.

4. The small-angle part extrusion forming device according to claim 1, characterized in that: The extrusion lower punch (6) is coated with a surface coating, the surface coating is a titanium carbonitride coating, and the unit thickness of the surface coating is 0.002-0.003 mm.

5. The small-angle part extrusion forming device according to claim 1, characterized in that: A height-limiting plate (14) is further arranged between the fixed plate (12) and the unloading block (4).

6. The small-angle part extrusion forming device according to claim 1, characterized in that: The material lifting mechanism (13) comprises a material lifting spring (131) and a material lifting rod (132), the lower die seat (2) is provided with a material lifting cavity (133) matched with the material lifting spring (131), the material lifting rod (132) is fixedly provided with a material lifting gasket (1321) at one end close to the material lifting spring (131), the material lifting rod (132) and the material lifting cavity (133) are coaxially arranged, the bottom of the material lifting cavity (133) is fixedly provided with a stopper (134), one end of the material lifting spring (131) is fixedly connected with the stopper (134), and the other end is fixedly connected with the material lifting gasket (1321).

Images