Forming die for stamping and forming intermediate product of closed plug-in hoop

Abstract

The utility model belongs to the technical field of agricultural machinery part processing, and particularly relates to a forming die for stamping and forming an intermediate product of a closed plug-in hoop, which comprises a lower die holder and an upper die holder, a lower die insert, a material supporting ejector and a lower ejection spring are arranged on the lower die holder, the lower die insert is fixedly mounted on the lower die holder, and the material supporting ejector is fixedly mounted on the upper die holder. The material supporting ejector is movably installed on the lower die base, the lower ejection spring is arranged below the material supporting ejector, the middle of the upper surface of the material supporting ejector is a rectangular plane, and the two ends of the rectangular plane are arc-shaped concave faces. The upper die base comprises an upper die insert and a material pressing device, the material pressing device is movably installed on the upper die insert, and the shape of the lower surface of the upper die insert is matched with the shape of the upper surface of the material supporting ejector. The clamp is used for machining a middle product with two circular arcs and a flat plate in the middle, and machining of the side edges of the hoop is completed synchronously.

Description

Technical Field

[0001] This utility model relates to a forming mold for stamping intermediate products of closed plug-in clamps, belonging to the field of agricultural machinery parts processing technology. Background Technology

[0002] In recent years, the trend towards larger harvesting machinery has become unstoppable. Whether in the grain and corn harvesting machinery market or the cash crop harvesting machinery market, the demand structure adjustment is pointing towards larger sizes. The blower impeller clamp, as one of the core components of large harvesters, is located inside the blower impeller assembly and has a closed plug-in structure. (See attached image.) Figure 9 The closed-loop clamp has a near-circular closed-loop structure. One side of the clamp is bent and inserted into the insertion hole on the other side. The closed-loop clamp is fixed on the blower flange, which fixes the flange and the blower shaft together with high precision. The forming efficiency and part precision of the closed-loop clamp are very important for the assembly and use of the harvester. Therefore, the manufacturing process and precision of the blower flange clamp are very important.

[0003] There are many methods for processing clamps, the most common being: machining, manual shaping, and die forming. Machining requires specialized equipment for clamp making, using machine tools for direct processing without molds, resulting in faster processing speeds. However, it can only process relatively simple clamp shapes, mostly open clamps, and cannot process closed clamps. Manual shaping uses simple forming molds for approximate forming, followed by manual shaping. However, the surface accuracy of the pressed parts has relatively large errors, and the efficiency is relatively low. Die forming uses molds to press out parts. The die forming process for closed clamps requires three steps to form the part. First, the sides of both ends of the closed interlocking clamp are formed to create the interlocking structure. Then, the arc-shaped center of the product is partially formed by stamping. Because there is a punch on the top of the product, it cannot be directly stamped into a fully closed structure. The sides of the product need to be side-shaped in the final step to form the final structure. Die forming produces parts with low forming accuracy and is not suitable for forming closed clamp parts, as it can easily result in insufficient punch strength or punch interference during the forming process.

[0004] In existing technologies, mold forming processes employ a method of first forming the middle section and then the sides, requiring three steps to complete the product forming. Therefore, a forming mold is needed that alters the forming sequence of the closed-joint clamp mold; specifically, a mold capable of simultaneously forming the two sides and the curvature of the clamp during the first processing step (see [link to mold designation]). Figure 8 ) forming mold. Summary of the Invention

[0005] This utility model addresses the shortcomings of existing technologies by providing a forming mold for stamping intermediate products using a closed-loop clamp.

[0006] A forming die for stamping intermediate products using a closed-type insert clamp includes a lower die base and an upper die base. The lower die base is provided with a lower die insert, a material ejector, and a lower ejection spring. The lower die insert is fixedly mounted on the lower die base, and the material ejector is movably mounted on the lower die base. The lower die insert is located at the end of the material ejector, and the lower ejection spring is located below the material ejector. The bottom surface of the material ejector contacts the top surface of the lower ejection spring. When not compressed, the height of the ejector is equal to or higher than the height of the lower die insert. The upper surface of the ejector is a rectangular plane in the middle, and the two ends of the rectangular plane are concave arc surfaces. The upper die base includes an upper die insert and a pressure plate. The pressure plate is movably mounted on the upper die insert. The bottom surface of the pressure plate is a plane. The pressure plate is set corresponding to the rectangular plane of the ejector. The shape of the lower surface of the upper die insert is adapted to the upper surface of the ejector.

[0007] The beneficial effects of this utility model are as follows: The forming mold of this utility model is used to process the intermediate product of the closed plug-in clamp stamping. This utility model sets the upper surface of the material ejector to be a rectangular plane in the middle, and the two ends of the rectangular plane are arc-shaped concave surfaces. The upper mold base moves downward, and the upper mold insert and pressure plate on the upper mold base cooperate with the material ejector on the lower mold base to stamp out the intermediate product with arc sections on both sides and a straight section in the middle. At the same time, the stamping forming process of the two sides of the clamp is completed. The diameter of the two arc sections of the intermediate product is the same as the arc diameter of the final product. This realizes the pre-forming of the arc structure of the final closed plug-in clamp product, which can reduce the springback after the final arc forming, greatly reduce the difficulty of subsequent mold debugging, and improve the debugging efficiency.

[0008] Furthermore, the material ejector is provided with side positioning members on both sides, and the height of the side positioning members is higher than the height of the material ejector.

[0009] The beneficial effect of adopting the above-mentioned further technical solution is that the flat plate placed on the material ejector is positioned in the front and rear directions by the side positioning component, thus ensuring the processing accuracy.

[0010] Furthermore, the opposite ends of the ejector and the lower mold insert are respectively provided with end positioning members. When the lower ejector spring is not compressed, the height of the end positioning member is higher than the height of the ejector.

[0011] The beneficial effect of adopting the above-mentioned further technical solution is that the end of the flat plate placed on the material ejector is positioned in the left and right directions by the end positioning component, thus ensuring the processing accuracy.

[0012] Furthermore, the upper mold base is provided with an upper ejector spring, the end of which presses against the top surface of the pressure material.

[0013] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: by pressing the upper ejector spring against the top surface of the pressure plater, the plate is firmly pressed down at the beginning of the plate forming process, ensuring that the clamped plate remains stably and reliably positioned throughout the forming process; as the upper mold base continues to descend, the pressure plater moves within the upper mold base, compressing the upper ejector spring, and the compression and rebound force of the upper ejector spring continues to act on the plate, ensuring the stability of the forming process.

[0014] Furthermore, the upper mold insert is provided with a square through hole for installing the pressure device, and a limiting platform is provided at the inner end of the square through hole, and a corresponding boss is provided on the pressure device.

[0015] The beneficial effects of adopting the above-mentioned further technical solution are: the boss is stuck on the limiting platform, thereby installing the pressure plate in the square through hole, realizing the installation of the pressure plate, preventing the pressure plate from falling off the upper die base, and the pressure plate can also move in the square through hole during the stamping process.

[0016] Furthermore, the lower mold base is provided with a guide post, and the upper mold base is provided with a corresponding guide sleeve, the diameter of the guide sleeve being larger than the outer diameter of the guide post.

[0017] The beneficial effect of adopting the above-mentioned further technical solution is that the cooperation of the guide post and the guide sleeve can guide the up and down movement of the upper die holder, and ensure the guiding accuracy of the die in the stamping direction.

[0018] Furthermore, the lower mold base is provided with a pad and a fixing plate. The fixing plate is located above the pad and has a through groove for installing the lower mold insert and the material ejector. The material ejector is movably installed in the through groove, the lower ejector spring is installed on the pad, and the lower mold insert is fixedly installed on the pad.

[0019] Furthermore, the material ejector is provided with a guide plate, and the inner side of the through groove of the fixed plate is provided with a corresponding sliding surface.

[0020] The beneficial effects of adopting the above-mentioned further technical solution are: the material ejector and the lower mold insert are installed by the pad and the fixing plate, which provides a stable installation for the material ejector and the lower mold insert, and the through groove of the fixing plate is provided with a guide surface, which, in cooperation with the guide plate, can provide a limiting and guiding effect for the movement of the material ejector.

[0021] Furthermore, multiple lower ejector springs are provided, and the lower ejector springs are nitrogen springs.

[0022] Furthermore, the upper ejector spring is a nitrogen spring. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the lower mold base;

[0025] Figure 3 This is a schematic diagram of the downward ejection spring.

[0026] Figure 4 This is a schematic diagram of the upper mold base;

[0027] Figure 5 This is a schematic diagram of the material feeder.

[0028] Figure 6 This is a schematic diagram of the mold opening process after pressing is completed;

[0029] Figure 7 This is a schematic diagram of the structure of the flat plate to be pressed;

[0030] Figure 8 This is a schematic diagram of the structure of the intermediate product after pressing;

[0031] Figure 9 This is a schematic diagram of a closed-loop clamp.

[0032] The attached diagram is labeled as follows: 100, lower mold base; 101, lower mold insert; 102, ejector; 103, side positioning element; 104, lower ejection spring; 105, guide post; 106, pad; 107, fixing plate; 108, end positioning element; 200, upper mold base; 201, upper mold insert; 202, guide sleeve; 203, upper ejection spring; 204, pressure plate. Detailed Implementation

[0033] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0034] See Figures 1-6A forming mold for stamping intermediate products using a closed-type plug-in clamp includes a lower mold base 100 and an upper mold base 200. The lower mold base 100 is provided with a lower mold insert 101, a material ejector 102, and a lower ejection spring 104. The lower mold insert 101 is fixedly installed on the lower mold base 100, and the material ejector 102 is movably installed on the lower mold base 100. The lower mold insert 101 is located at the end of the material ejector 102. Specifically, in this embodiment, the lower mold base 100 is provided with a pad 106 and a fixing plate 107. The fixing plate 107 is located above the pad 106, and the pad 106 and the fixing plate 107 are connected by a through-hole mechanism. The lower mold base 100 is fixedly installed with bolts and pins. The fixing plate 107 is provided with a through groove for installing the lower mold insert 101 and the material ejector 102. The material ejector 102 is movably installed in the through groove and is provided with a guide plate. The inner side of the through groove of the fixing plate 107 is provided with a corresponding sliding surface. The lower ejection spring 104 is installed on the pad 106. The lower mold insert 101 is fixedly installed on the pad 106 with bolts and pins. During the downward movement of the upper mold base 200, the material ejector 102 is driven to move, which enables the material ejector 102 and the lower mold insert 101 to move relative to each other.

[0035] See Figure 3 Multiple lower ejector springs 104 are provided, and the lower ejector springs 104 are nitrogen springs. The lower ejector spring 104 is located on the pad 106 and below the ejector 102. The bottom surface of the ejector 102 contacts the top surface of the lower ejector spring 104. When the lower ejector spring 104 is not compressed, the height of the ejector 102 is equal to or higher than the height of the lower mold insert 101. Specifically, in this embodiment, the height of the ejector 102 is equal to the height of the lower mold insert 101. In the initial state, when the flat plate is placed on the ejector 102, the flat plate can be placed stably without shaking or shifting. A limiting screw is movably provided on the pad 106. The end of the limiting screw is connected to the ejector 102. The limiting screw is used to limit the ejection stroke of the ejector 102 to prevent the ejector 102 from being ejected out of the through groove under the spring force of the lower ejector spring 104.

[0036] The upper surface of the ejector 102 has a rectangular plane in the middle, and the two ends of the rectangular plane are arc-shaped concave surfaces. The rectangular plane and the arc-shaped concave surfaces are connected by an arc. The curvature of the arc-shaped concave surfaces is adapted to the curvature of the final product. The two ends of the upper surface of the ejector 102 are planes, and the planes at both ends of the ejector 102 are connected by an arc. Side positioning members 103 are provided on both sides of the ejector 102. The height of the side positioning members 103 is higher than the height of the ejector 102. The opposite ends of the ejector 102 and the lower mold insert 101 are provided with end positioning members 108. When the lower ejection spring 104 is not compressed, the height of the end positioning member 108 is higher than the height of the ejector 102.

[0037] The upper mold base 200 includes an upper mold insert 201 and a pressure plate 204. The pressure plate 204 is movably mounted on the upper mold insert 201. Specifically, the upper mold insert 201 has a square through hole for mounting the pressure plate 204. A limiting platform is provided at the inner end of the square through hole. A corresponding boss is provided on the pressure plate 204. The bottom surface of the pressure plate 204 is a plane. The pressure plate 204 is set to correspond to the rectangular plane of the material ejector 102. The shape of the lower surface of the upper mold insert 201 is adapted to the upper surface of the material ejector 102, that is, the lower surface of the upper mold insert 201 has an arc-shaped convex surface corresponding to the arc-shaped concave surface of the material ejector 102.

[0038] The upper mold base 200 is provided with an upper ejector spring 203. The end of the upper ejector spring 203 presses against the top surface of the pressure feeder 204. The upper ejector spring 203 is a nitrogen spring.

[0039] The lower mold base 100 is provided with a guide post 105, and the upper mold base 200 is provided with a corresponding guide sleeve 202. The diameter of the guide sleeve 202 is larger than the outer diameter of the guide post 105.

[0040] The processing procedure for this utility model is as follows:

[0041] 1. In the initial state, the upper mold base 200 is far away from the lower mold base 100, and the flat plate (see...) Figure 7 The material ejector 102 and the lower die insert 101 are placed on the lower die base 100. The side of one end of the flat plate has been machined with a insertion hole. The front and rear sides and left and right end faces of the flat plate are positioned and limited by the side positioning part 103 and the end positioning part 108 to ensure the stability of the flat plate during loading and stamping.

[0042] 2. After the flat plate is placed stably, the upper mold base 200 moves downward, driving the upper mold insert 201 and the pressure plater 204 to move downward. The pressure plater 204 first presses down on the middle position of the flat plate to ensure the stability of the plate. The upper mold base 200 continues to move downward to compress the upper ejector spring 203. Since there is a lower ejector spring 104 below the material ejector 102, the upper mold base 200 also compresses the lower ejector spring 104 as it moves downward, achieving the effect of upper and lower suspension and pressure.

[0043] 3. The upper mold base 200 continues to descend until the upper mold insert 201 contacts the flat plate. The rectangular plane of the pressure plater 204 and the material ejector 102 together press the middle of the flat plate. After pressing the middle of the flat plate, the upper mold base 200 continues to descend until the upper mold insert 201 and the material ejector 102 together press out two arc segments on the plate.

[0044] 4. The upper mold base 200 continues to descend and compress the lower ejector spring 104, driving the material ejector 102 to descend. The material ejector 102 and the lower mold insert 101 generate relative movement, thereby driving the material plate to descend. Under the action of the lower mold insert 101, the end of the material plate is bent (the end of the material plate that is bent here is the end that has not been processed with the insertion hole), pressing out the side of the end of the final clamp product for insertion, and pressing to form the intermediate product of the closed insertion clamp secondary stamping.

[0045] 5. The upper mold base 200 moves upward, the lower ejector spring 104 returns to its original position, thereby driving the material ejector 102 to move upward (see...). Figure 6 ), pushing out intermediate products (see Figure 8 This completes the pressing and molding of the product.

[0046] The difference between this invention and traditional mold forming methods lies in the fact that the first-stage forming process in traditional methods only involves flanging the sides of the part. However, the mold of this invention can process a middle product structure with arc-shaped sides and a straight middle section, while simultaneously forming the shape of the two end sides. This ensures that the diameter of the two arc-shaped sections is the same as the diameter of the final clamp product, effectively pre-forming part of the arc-shaped sections of the final clamp product. This pre-forming plays a crucial role in reducing springback after the final arc-shaped section is formed, significantly reducing the difficulty of subsequent mold adjustments and improving adjustment efficiency. Furthermore, the straight middle section utilizes… The upper and lower suspended pressing structure uses a nitrogen spring structure for the lower die base to ensure stable positioning of the part during initial positioning, which is a prerequisite for ensuring part accuracy. Then, the upper die base uses a nitrogen spring pressing structure to press the middle straight section before pressing the two arc segments, ensuring stability and reliability during the forming process of the two arc segments. Since both the upper and lower parts use a suspended structure, as the machine tool moves from top to bottom, the left and right arcs are formed first. Then, the upper die base drives the material plate and the ejector to continue to descend, forming the left end of the product by flanging. At this point, the intermediate product mold forming process of the closed plug-in clamp secondary stamping forming process is completed.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A forming mold for stamping intermediate products of a closed-loop clamp, comprising a lower mold base (100) and an upper mold base (200), characterized in that, The lower mold base (100) is provided with a lower mold insert (101), a material ejector (102), and a lower ejection spring (104). The lower mold insert (101) is fixedly installed on the lower mold base (100), and the material ejector (102) is movably installed on the lower mold base (100). The lower mold insert (101) is located at the end of the material ejector (102), and the lower ejection spring (104) is located below the material ejector (102). The bottom surface of the material ejector (102) and the top surface of the lower ejection spring (104) are connected. The upper surface of the ejector (102) is a rectangular plane in the middle, and the two ends of the rectangular plane are concave arcs. The upper mold base (200) includes an upper mold insert (201) and a pressure plate (204). The pressure plate (204) is movably mounted on the upper mold insert (201). The bottom surface of the pressure plate (204) is a plane. The pressure plate (204) is set corresponding to the rectangular plane of the ejector (102). The shape of the lower surface of the upper mold insert (201) is adapted to the upper surface of the ejector (102).

2. The forming mold for stamping intermediate products of the closed-loop clamp according to claim 1, characterized in that, The material ejector (102) is provided with side positioning components (103) on both sides.

3. The forming mold for stamping intermediate products of the closed-loop clamp according to claim 2, characterized in that, The ejector (102) and the lower mold insert (101) are respectively provided with end positioning parts (108) at opposite ends.

4. The forming mold for stamping intermediate products of the closed-loop clamp according to claim 3, characterized in that, The upper mold base (200) is provided with an upper ejector spring (203), and the end of the upper ejector spring (203) presses against the top surface of the pressure feeder (204).

5. The forming mold for stamping intermediate products of the closed-loop clamp according to claim 4, characterized in that, The upper mold insert (201) is provided with a square through hole for mounting the pressure device (204), and a limiting platform is provided at the inner end of the square through hole. The pressure device (204) is provided with a corresponding boss.

6. The forming mold for stamping intermediate products of the closed-loop clamp according to claim 5, characterized in that, The lower mold base (100) is provided with a guide post (105), and the upper mold base (200) is provided with a corresponding guide sleeve (202).

7. The forming mold for stamping intermediate products of the closed-loop clamp according to claim 6, characterized in that, The lower mold base (100) is provided with a pad (106) and a fixing plate (107). The fixing plate (107) is located above the pad (106). The fixing plate (107) is provided with a through groove for installing the lower mold insert (101) and the material ejector (102). The material ejector (102) is movably installed in the through groove. The lower ejection spring (104) is installed on the pad (106). The lower mold insert (101) is fixedly installed on the pad (106).

8. The forming mold for stamping intermediate products of the closed-loop clamp according to claim 7, characterized in that, The material ejector (102) is provided with a guide plate, and the inner side of the through groove of the fixed plate (107) is provided with a corresponding sliding surface.

9. The forming mold for stamping intermediate products of the closed-loop clamp according to claim 8, characterized in that, Multiple lower ejector springs (104) are provided, and the lower ejector springs (104) are nitrogen springs.

10. The forming mold for stamping intermediate products of the closed-loop clamp according to claim 9, characterized in that, The upper ejector spring (203) is a nitrogen spring.

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