Closed plug-in hoop forming die assembly
By combining first-order and second-order forming dies with floating punches and upper and lower suspended pressing structures, the problems of multiple forming processes and punch interference in the closed plug clamping process are solved, achieving efficient and high-precision processing of closed plug clamping dies.
Patent Information
- Application Number
- CN202423034321.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Existing technology requires at least three processes when processing closed-loop clamps, and the punch can easily interfere with product forming, resulting in low forming efficiency and low precision.
The process employs a first-stage forming mold and a second-stage forming mold. The first-stage forming mold processes the flat plate into an intermediate plate with arc segments on both sides and a straight segment in the middle. The second-stage forming mold completes the forming of the closed interlocking clamp. A floating punch is used to avoid punch interference, and the upper and lower floating pressure structure ensures positioning stability and accuracy.
It reduces the number of mold forming processes, improves forming efficiency and precision, avoids punch interference, and ensures product stability and reliability.
Smart Images
Figure CN223476111U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a mold assembly for forming a closed plug-in clamp, belonging to the technical field of closed plug-in clamp forming process. Background Technology
[0002] As one of the core components of large harvesters, the blower flange clamp is located inside the blower impeller assembly and is a closed plug-in structure (see...). Figure 14 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, fixing 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 of which are as follows:
[0004] Machining: Specialized equipment for making clamps is used to directly process them on machine tools without the need for molds. The processing speed is relatively fast, but the clamp shapes that can be processed are relatively simple and mostly open clamps. Closed clamps cannot be processed.
[0005] Manual straightening: This method uses simple molding molds to approximate the shape, and then straightens it manually. However, the resulting parts have relatively large surface accuracy errors and are inefficient.
[0006] Compression molding: This process involves pressing parts using a mold. It requires three steps to form the part. First, the sides 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 enclosed structure. In the last step, the sides of the product need to be side-shaped. This process can easily weaken the strength of the punch or cause the punch to interfere with the forming process.
[0007] Currently, forming closed interlocking clamps using molds still requires at least three processes. Therefore, it is necessary to find a molding process that reduces the number of mold forming processes for closed interlocking clamps and avoids interference from the punch in the product forming process. Utility Model Content
[0008] This utility model addresses the shortcomings of existing technologies by providing a closed plug-in clamp forming mold assembly.
[0009] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:
[0010] A closed-type plug-in clamp forming mold assembly includes a first-stage forming mold and a second-stage forming mold. The first-stage forming mold includes a first-stage lower mold base and a first-stage upper mold base. The first-stage lower mold base is provided with a first-stage lower mold insert, a first-stage material ejector, and a first-stage lower ejection spring. The first-stage lower mold insert is fixedly installed on the first-stage lower mold base, and the first-stage material ejector is movably installed on the first-stage lower mold base. The first-stage lower mold insert is located at the end of the first-stage material ejector, and the first-stage lower ejection spring is located below the first-stage material ejector. The bottom surface of the first-stage material ejector contacts the top surface of the first-stage lower ejection spring. When the first-order ejector spring is not compressed, the height of the first-order material ejector is equal to or higher than the height of the first-order lower die insert. The upper surface of the first-order material ejector has a rectangular plane in the middle, and the two ends of the rectangular plane are first-order arc-shaped concave surfaces. The first-order upper die base includes a first-order upper die insert and a first-order pressure plate. The first-order pressure plate is movably mounted on the first-order upper die insert. The bottom surface of the first-order pressure plate is a plane. The first-order pressure plate is set corresponding to the rectangular plane of the first-order material ejector. The shape of the lower surface of the first-order upper die insert is adapted to the upper surface of the first-order material ejector.
[0011] The beneficial effects of this utility model are as follows:
[0012] The molding die assembly of this utility model includes a first-stage molding die and a second-stage molding die. The first-stage molding die is used to process a flat plate into an intermediate plate, and the second-stage molding die is used to process the intermediate plate into a closed plug-in clamp. In the first-stage molding die of this utility model, the upper surface of the first-stage ejector is set as a rectangular plane in the middle, and the two ends of the rectangular plane are first-stage arc-shaped concave surfaces. Therefore, the first-stage molding die can stamp the flat plate into an intermediate plate with arc segments on both sides and a straight section in the middle, and simultaneously complete the forming of the two sides of the intermediate plate. The diameter of the two arc segments of the intermediate plate is the same as the arc diameter of the final product, realizing the pre-forming of the arc structure of the final closed plug-in clamp product. This can reduce the springback after the final arc forming, greatly reduce the debugging difficulty of the second-stage molding die, and improve the debugging efficiency.
[0013] Furthermore, the upper die holder is provided with an upper ejector spring, the end of which presses against the top surface of the upper die holder.
[0014] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by pressing the first-sequence upper ejector spring against the top surface of the first-sequence pressure plater, the flat plate is firmly pressed down at the beginning of the flat plate forming process, ensuring that the flat plate is always positioned stably and reliably during the forming process; as the first-sequence upper mold base continues to descend, when the first-sequence pressure plater moves in the first-sequence upper mold base, the pressure plater compresses the first-sequence upper ejector spring, and the compression rebound force of the first-sequence upper ejector spring continues to act on the flat plate, ensuring the stability of the forming process.
[0015] Furthermore, the first-order lower ejection spring is provided with multiple springs, the first-order lower ejection spring is a nitrogen spring, and the first-order upper ejection spring is a nitrogen spring.
[0016] Furthermore, the two-stage forming mold includes a two-stage lower mold base and a two-stage upper mold base. The two-stage lower mold base is provided with a two-stage lower mold insert, a two-stage lower mold support, and a floating punch. The two-stage lower mold insert is fixedly installed on the two-stage lower mold base. The two-stage lower mold support is movably installed on the two-stage lower mold insert. The floating punch is movably installed on the two-stage lower mold insert. The upper center of the two-stage lower mold support has a two-stage arc-shaped concave surface. The floating punch includes a punch base and a punch body installed perpendicularly on the side of the punch base. The punch body is cylindrical. The two-stage upper mold base is provided with a two-stage upper mold first insert and a two-stage upper mold second insert. The two-stage upper mold first insert is disposed corresponding to the punch base, and the two-stage upper mold second insert is disposed corresponding to the punch body.
[0017] The beneficial effects of adopting the above-mentioned further technical solution are as follows: A floating punch is used for forming. The floating punch adopts a cylindrical punch body. When the punch body presses down to form the central arc segment of the intermediate material plate, the arcs at both ends of the intermediate material plate flip upwards and finally hug the cylindrical punch body, completing the forming process of the central arc segment of the clamp. This makes the intermediate material plate form a nearly circular closed plug-in clamp structure. The punch body will not interfere with the two sides of the intermediate material plate. Compared with traditional processing methods, the two-stage forming mold of this utility model does not affect the feeding and unloading process. During the forming process, the punch body will not interfere with the sides and arc segments of the product, and the forming accuracy can also be guaranteed.
[0018] Furthermore, the second-order lower die insert is provided with a punch floating groove for mounting the floating punch. The punch floating groove is located on one side of the second-order lower die support, and the punch seat is movably inserted into the punch floating groove.
[0019] The beneficial effect of adopting the above-mentioned further technical solution is that the floating punch is inserted into the floating punch groove, making the installation and movement of the floating punch more stable.
[0020] Furthermore, a second-order lower die spring is provided on the bottom surface of the punch floating groove, and at least two second-order lower die springs are provided.
[0021] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the second-order lower die spring provides support for the installation of the floating punch in the punch floating groove, and during the downward pressing process of the second-order upper die seat, the first and second inserts of the second-order upper die press on the floating punch and drive the floating punch downward. During the downward movement of the floating punch, the second-order lower die spring is compressed, so that the floating punch moves downward stably. After processing is completed, the second-order upper die seat moves upward, and the floating punch rises smoothly under the spring force of the second-order lower die spring, and drives the clamping product on it to move upward, which facilitates the discharge of the product.
[0022] Furthermore, the upper side of the punch body is provided with a pressing plane, and the end face of the second insert of the second-order upper die is a plane.
[0023] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: Since the punch body is cylindrical, the cylindrical punch body is not conducive to the pressing stability of the second-stage upper die holder going down. By setting the pressing plane, the stability of the second insert of the second-stage upper die on the punch body can be guaranteed, thereby ensuring the stability of the floating punch during the process of the second-stage upper die holder driving the floating punch down.
[0024] Furthermore, the end face of the first insert of the second-order upper die is a plane, the top surface of the punch seat is a plane, and there are two first inserts of the second-order upper die.
[0025] The beneficial effect of adopting the above-mentioned further technical solutions is to ensure the stability of the first insert of the second-order upper die pressing on the punch seat.
[0026] Furthermore, the side of the punch seat is provided with a guide plate, and the inner wall of the punch floating groove is provided with a corresponding guide groove.
[0027] The beneficial effect of adopting the above-mentioned further technical solution is that the cooperation between the guide plate and the guide groove provides a guiding effect for the movement of the floating punch in the floating punch groove.
[0028] Furthermore, the second-order lower mold insert is provided with two sets of second-order side positioning members. The two sets of second-order side positioning members are respectively located at both ends of the second-order lower mold support member, and each set includes two second-order side positioning members arranged opposite to each other.
[0029] The beneficial effect of adopting the above-mentioned further technical solution is that the material plate placed on the material support of the second-order lower mold is positioned in the front and rear directions by the second-order side positioning component, so as to ensure the processing accuracy.
[0030] Furthermore, the second-order lower mold insert is provided with a second-order end positioning component, and two second-order end positioning components are provided opposite to each other, with the two second-order end positioning components respectively located at both ends of the second-order lower mold support component.
[0031] The beneficial effect of adopting the above-mentioned further technical solution is that the end of the material plate placed on the material plate in the left and right positions on the second-order lower mold support is positioned by the second-order end positioning component, so as to ensure the processing accuracy.
[0032] Furthermore, the lower mold base of the second sequence is provided with a second sequence guide post, and the upper mold base of the second sequence is provided with a corresponding second sequence guide sleeve, wherein the diameter of the second sequence guide sleeve is larger than the outer diameter of the second sequence guide post.
[0033] The beneficial effect of adopting the above-mentioned further technical solution is that, through the cooperation of the second-order guide post and the second-order guide sleeve, the up-and-down movement of the second-order upper die holder is guided, ensuring the guiding accuracy of the die in the stamping direction.
[0034] Furthermore, the first-order upper mold insert is provided with a square through hole for installing the first-order 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 first-order pressure device.
[0035] The beneficial effects of adopting the above-mentioned further technical solution are: the boss is stuck on the limiting platform, thereby installing the first-order pressure plater in the square through hole, realizing the installation of the first-order pressure plater, preventing the first-order pressure plater from falling off the first-order upper die base, and the first-order pressure plater can also move in the square through hole during the stamping process.
[0036] Furthermore, a first-order side positioning member is provided on each side of the first-order material ejector, and the height of the first-order side positioning member is higher than the height of the first-order material ejector.
[0037] The beneficial effect of adopting the above-mentioned further technical solution is that the flat plate placed on the first-order material ejector is positioned in the front and rear directions by the first-order side positioning component, so as to ensure the processing accuracy.
[0038] Furthermore, the first-order ejector and the first-order lower mold insert are respectively provided with a first-order end positioning member at opposite ends. When the first-order lower ejector spring is not compressed, the height of the first-order end positioning member is higher than the height of the first-order ejector.
[0039] The beneficial effect of adopting the above-mentioned further technical solution is that the end of the flat plate placed on the first-order material ejector is positioned in the left and right directions by the first-order end positioning component, so as to ensure the processing accuracy.
[0040] Furthermore, a sequence guide post is provided on the lower mold base, and a sequence guide sleeve is correspondingly provided on the upper mold base, wherein the diameter of the hole of the sequence guide sleeve is larger than the outer diameter of the sequence guide post.
[0041] The beneficial effect of adopting the above-mentioned further technical solution is that, through the cooperation of the first-order guide post and the first-order guide sleeve, the up-and-down movement of the first-order upper die base is guided, ensuring the guiding accuracy of the first-order forming die in the stamping direction.
[0042] Furthermore, the first-order lower mold base is provided with a first-order pad and a first-order fixing plate. The first-order fixing plate is located above the first-order pad. The first-order fixing plate is provided with a through groove for installing the first-order lower mold insert and the first-order material ejector. The first-order material ejector is movably installed in the through groove. The first-order lower ejection spring is installed on the first-order pad. The first-order lower mold insert is fixedly installed on the first-order pad.
[0043] Furthermore, the first-order material ejector is provided with a guide plate, and the inner side of the through groove of the first-order fixing plate is provided with a corresponding sliding surface.
[0044] The beneficial effects of adopting the above-mentioned further technical solution are: the first-order material ejector and the first-order lower mold insert are installed by the first-order pad plate and the first-order fixing plate, which provides a stable installation for the first-order material ejector and the first-order lower mold insert, and the through groove of the first-order fixing plate is provided with a guide surface, which, in cooperation with the guide plate, can provide a limiting and guiding effect on the movement of the first-order material ejector. Attached Figure Description
[0045] Figure 1 This is a schematic diagram of the three-dimensional structure of a sequential molding die;
[0046] Figure 2 This is a schematic diagram of the three-dimensional structure of a lower mold base;
[0047] Figure 3 This is a schematic diagram of a sequential ejector spring.
[0048] Figure 4 This is a schematic diagram of the structure of a sequence upper mold base;
[0049] Figure 5 This is a schematic diagram of the structure of a sequential feeder;
[0050] Figure 6 This is a schematic diagram of the mold opening process after the intermediate material plate is pressed in one sequence.
[0051] Figure 7 This is a three-dimensional structural diagram of a two-stage molding die;
[0052] Figure 8 This is a schematic diagram of the structure of the second-order lower mold base;
[0053] Figure 9 This is a schematic diagram of the floating punch structure;
[0054] Figure 10This is a schematic diagram of the structure of the second-order upper mold base;
[0055] Figure 11 This is a schematic diagram of the product state after the second pressing process is completed;
[0056] Figure 12 This is a schematic diagram of the structure of the flat plate to be pressed;
[0057] Figure 13 A schematic diagram of the structure of an intermediate material plate formed in a single process;
[0058] Figure 14 A schematic diagram of the structure of a closed-loop clamp;
[0059] Figure 15 This is a schematic diagram of the mold closing state of the upper mold base in the second sequence;
[0060] Figure 16 This is a schematic diagram of the process of forming an intermediate material plate into a closed interlocking clamp.
[0061] The reference numerals in the attached drawings are as follows: 100, Lower die base (first sequence); 101, Lower die insert (first sequence); 102, Ejector (first sequence); 103, Side positioning element (first sequence); 104, Lower ejector spring (first sequence); 105, Guide post (first sequence); 106, Pad (first sequence); 107, Fixing plate (first sequence); 108, End positioning element (first sequence); 200, Upper die base (first sequence); 201, Upper die insert (first sequence); 202, Guide sleeve (first sequence); 203, Upper ejector spring (first sequence); 204, Pressure plate (first sequence); 300. Second-order lower die base; 301, second-order lower die insert; 302, second-order lower die material support; 303, second-order side positioning component; 304, second-order lower die spring; 305, second-order guide post; 306, second-order end positioning component; 307, punch floating groove; 400, floating punch; 401, punch base; 402, punch body; 403, pressing surface; 500, second-order upper die base; 501, second-order upper die first insert; 502, second-order upper die second insert; 503, second-order guide sleeve. Detailed Implementation
[0062] 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.
[0063] See Figures 1-11 A closed-type plug-in clamp forming mold assembly includes a first-order forming mold and a second-order forming mold.
[0064] See Figures 1-6The sequential forming mold 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 ejector 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 first-order pad 106 and a first-order fixing plate 107. The first-order fixing plate 107 is located above the first-order pad 106, and the first-order pad 106 and the first-order fixing plate 107 are connected by bolts. The first-order upper mold base 100 is fixedly installed with pins. The first-order fixing plate 107 is provided with a through groove for installing the first-order lower mold insert 101 and the first-order material ejector 102. The first-order material ejector 102 is movably installed in the through groove. The first-order material ejector 102 is provided with a guide plate. The inner side of the through groove of the first-order fixing plate 107 is provided with a corresponding sliding surface. The first-order lower ejection spring 104 is installed on the first-order pad 106. The first-order lower mold insert 101 is fixedly installed on the first-order pad 106 by bolts and pins. During the downward movement of the first-order upper mold base 200, the first-order material ejector 102 is driven to move, so that the first-order material ejector 102 and the first-order lower mold insert 101 can generate relative movement.
[0065] See Figure 3 Multiple first-order ejector springs 104 are provided, and each first-order ejector spring 104 is a nitrogen spring. The first-order ejector springs 104 are located on the first-order pad 106 and below the first-order material ejector 102. The bottom surface of the first-order material ejector 102 contacts the top surface of the first-order ejector springs 104. When the first-order ejector springs 104 are not compressed, the height of the first-order material ejector 102 is equal to or higher than the height of the first-order lower mold insert 101. Specifically, in this embodiment, the height of the first-order material ejector 102 is equal to the height of the first-order lower mold insert 101. In the initial state... In this state, when the flat plate is placed on the first-order material ejector 102, the flat plate can be placed stably without shaking or shifting. The first-order pad 106 is movably provided with a first-order material ejector limiting screw. The end of the first-order material ejector limiting screw is connected to the first-order material ejector 102. The first-order material ejector limiting screw is used to limit the ejection stroke of the first-order material ejector 102 to prevent the first-order material ejector 102 from being ejected out of the through groove under the spring force of the first-order lower ejection spring 104.
[0066] The upper surface of the first-order ejector 102 has a rectangular plane in the middle, and the two ends of the rectangular plane are first-order arc-shaped concave surfaces. The rectangular plane and the first-order arc-shaped concave surfaces are connected by an arc. The curvature of the first-order arc-shaped concave surfaces is adapted to the curvature of the final product. The two ends of the upper surface of the first-order ejector 102 are planes, and the planes at both ends of the first-order ejector 102 are connected by an arc. First-order side positioning members 103 are provided on both sides of the first-order ejector 102. The height of the first-order side positioning members 103 is higher than the height of the first-order ejector 102. First-order end positioning members 108 are provided at the opposite ends of the first-order ejector 102 and the first-order lower mold insert 101. When the first-order lower ejection spring 104 is not compressed, the height of the first-order end positioning member 108 is higher than the height of the first-order ejector 102.
[0067] The first-order upper mold base 200 includes a first-order upper mold insert 201 and a first-order pressure platen 204. The first-order pressure platen 204 is movably mounted on the first-order upper mold insert 201. Specifically, the first-order upper mold insert 201 is provided with a square through hole for mounting the first-order pressure platen 204. A limiting platform is provided at the inner end of the square through hole. A corresponding boss is provided on the first-order pressure platen 204. The bottom surface of the first-order pressure platen 204 is a plane. The first-order pressure platen 204 is set in a rectangular plane corresponding to the first-order material ejector 102. The shape of the lower surface of the first-order upper mold insert 201 is adapted to the upper surface of the first-order material ejector 102, that is, the lower surface of the first-order upper mold insert 201 is provided with an arc-shaped convex surface corresponding to the arc-shaped concave surface of the first-order material ejector 102.
[0068] A first-order upper mold base 200 is provided with a first-order upper ejector spring 203. The end of the first-order upper ejector spring 203 presses against the top surface of the first-order pressure material 204. The first-order upper ejector spring 203 is a nitrogen spring.
[0069] A first-order guide post 105 is provided on the first-order lower mold base 100, and a first-order guide sleeve 202 is correspondingly provided on the first-order upper mold base 200. The diameter of the first-order guide sleeve 202 is larger than the outer diameter of the first-order guide post 105.
[0070] See Figures 7-11The two-stage forming mold includes a lower mold base 300 and an upper mold base 500. The lower mold base 300 is provided with a lower mold insert 301, a lower mold support 302, and a floating punch 400. The lower mold insert 301 is fixedly installed on the lower mold base 300, and the lower mold support 302 is movably installed on the lower mold insert 301. Specifically, the lower mold insert 301 has a mounting groove for installing the lower mold support 302. The lower die support component 302 is movably installed in the mounting groove, and the height of the lower die support component 302 is higher than the height of the mounting groove. The mounting groove contains a lower die ejection spring and a lower die limiting screw. The top of the lower die ejection spring contacts the bottom surface of the lower die support component 302. The lower die limiting screw is movably installed on the lower die insert 301 and is connected to the lower die support component 302 for securing the lower die support component 302. 02 The sliding within the mounting groove provides a limiting function, preventing the second-stage lower die support component 302 from being ejected outside the mounting groove under the spring force of the second-stage ejector spring. A guide plate is provided on the side of the second-stage lower die support component 302, and a guide surface is provided on the inner side of the mounting groove. The floating punch 400 includes a punch seat 401 and a punch body 402. The punch body 402 is perpendicularly mounted on the upper part of the side of the punch seat 401 and is cylindrical. The 00 is mounted on the second-stage lower die insert 301. Specifically, the second-stage lower die insert 301 has a punch floating groove 307 for mounting the floating punch 400. The punch floating groove 307 is located on one side of the second-stage lower die support 302, that is, the mounting groove and the punch floating groove 307 are arranged side by side. The bottom of the punch seat 401 is movably inserted into the punch floating groove 307. The side of the punch seat 401 is provided with a guide plate, and the inner wall of the punch floating groove 307 is provided with a corresponding guide surface. The upper center of the second-stage lower die support 302 has a second-stage arc-shaped concave surface. The two ends of the second-stage arc-shaped concave surface are flat, and the upper surface of the flat surface has an arc-shaped indentation, which facilitates... Figure 13 The placement of the arc segments at both ends of the intermediate material plate is shown. A second-order lower die spring 304 is provided on the bottom surface of the punch floating groove 307. The top surface of the second-order lower die spring 304 abuts against the punch seat 401. At least two second-order lower die springs 304 are provided, and each second-order lower die spring 304 is a nitrogen spring. Two sets of second-order side positioning members 303 are provided on the second-order lower die insert 301. The two sets of second-order side positioning members 303 are respectively located at both ends of the second-order lower die support member 302. Each set includes two opposing second-order side positioning members 303. Two second-order end positioning members 306 are provided on the second-order lower die insert 301. The two second-order end positioning members 306 are respectively located at both ends of the second-order lower die support member 302.
[0071] The second-order upper mold base 500 is provided with a first insert 501 and a second insert 502 for the second-order upper mold. The first insert 501 corresponds to the punch base 401, and the second insert 502 corresponds to the punch body 402.
[0072] The upper side of the punch body 402 is provided with a pressing plane 403, and the end face of the second insert 502 of the second-order upper die is a plane.
[0073] The end face of the first insert 501 of the second-order upper die is a plane, and the top face of the punch seat 401 is a plane. There are two first inserts 501 of the second-order upper die.
[0074] The lower mold base 300 is provided with a second-order guide post 305, and the upper mold base 500 is provided with a corresponding second-order guide sleeve 503. The diameter of the second-order guide sleeve 503 is larger than the outer diameter of the second-order guide post 305.
[0075] The molding process of the closed-loop clamp molding die assembly of this utility model includes a first-stage process and a second-stage process, wherein:
[0076] The first process processes the flat sheet into an intermediate sheet with rounded edges and a straight middle section, and shapes the sides of both ends of the flat sheet. One end of the flat sheet has already been machined with a connector hole (see...). Figure 12 );
[0077] The second process processes the straight section in the middle of the intermediate material plate into an arc section. During the processing of the arc section, the arc sections at both ends of the intermediate material plate rotate upward until one side of the intermediate material plate is inserted into the other side, thus completing the forming of the closed insertion clamp.
[0078] Specifically, this embodiment includes the following steps:
[0079] I. First-order process:
[0080] S11. In the initial state, the upper die holder 200 moves away from the lower die holder 100, and the flat plate (see...) Figure 12 The first-order material ejector 102 and the first-order lower die insert 101 are placed on the first-order lower die base 100. The front and rear sides and left and right end faces of the flat plate are positioned and limited by the first-order side positioning part 103 and the first-order end positioning part 108 to ensure the stability of the flat plate during loading and stamping.
[0081] S12. After the flat plate is placed stably, the first-order upper mold base 200 moves downward, driving the first-order upper mold insert 201 and the first-order pressure platen 204 to move downward. The first-order pressure platen 204 first presses down on the middle position of the flat plate to ensure the stability of the flat plate. The first-order upper mold base 200 continues to move downward to compress the first-order upper ejector spring 203. Since there is a first-order lower ejector spring 104 below the first-order material ejector 102, the first-order upper mold base 200 also compresses the first-order lower ejector spring 104 as it moves downward, achieving the effect of upper and lower suspension and pressure.
[0082] S13. The first-order upper die holder 200 continues to descend until the first-order upper die insert 201 contacts the flat plate. The rectangular planes of the first-order pressure plater 204 and the first-order material ejector 102 jointly press the middle of the flat plate. After pressing the middle of the flat plate, the first-order upper die holder 200 continues to descend until the first-order upper die insert 201 and the first-order material ejector 102 jointly press out two arc segments on the flat plate.
[0083] S14. The first-order upper mold base 200 continues to descend and compress the first-order lower ejector spring 104, driving the first-order material ejector 102 to descend. The first-order material ejector 102 and the first-order lower mold insert 101 generate relative movement, thereby driving the material plate to descend. Under the action of the first-order 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 without the insertion hole), pressing out the side of the closed insertion clamp end for insertion, and completing the pressing and forming of the intermediate material plate.
[0084] S15. The first-stage upper mold base 200 moves upward, and the first-stage lower ejector spring 104 returns to its original position, thereby driving the first-stage material ejector 102 to move upward (see...). Figure 6 ), eject the middle material plate to facilitate its removal;
[0085] II. Second-stage process:
[0086] S21. In the initial state, the second-stage upper mold base 500 is moved away from the second-stage lower mold base 300, and the intermediate material plate obtained from the first-stage process (see...) Figure 13 The material is placed on the second-order lower die support 302 of the second-order lower die base 300. The front and rear sides and left and right end faces of the intermediate material plate are positioned and limited by the second-order side positioning part 303 and the second-order end positioning part 306 respectively, so as to ensure the stability of the intermediate material plate during loading and stamping.
[0087] S22. After the intermediate material plate is placed stably, the second-order upper die holder 500 moves downward, driving the first insert 501 and the second insert 502 of the second-order upper die to move downward. The first insert 501 of the second-order upper die presses on the top surface of the punch holder 401, and the second insert 502 of the second-order upper die presses on the pressing surface 403 of the punch body 402. The second-order upper die holder 500 continues to move downward, driving the floating punch 400 to move downward and compressing the second-order lower die spring 304, thus achieving the effect of floating pressing.
[0088] S23. The second-stage upper die holder 500 continues to descend until the punch body 402 contacts the straight section in the middle of the intermediate material plate. Then, the second-stage upper die holder 500 continues to descend, causing the punch body 402 and the second-stage lower die support 302 to jointly press the straight section of the intermediate material plate into an arc section. During this forming process, the arc sections at both ends of the intermediate material plate flip upwards to hug the punch body 402 until one side of the intermediate material plate interlocks with the other side, pressing to form a closed interlocking clamp shape (see...). Figure 15 );
[0089] S24. The second-order upper die holder 500 moves upward, the first insert 501 and the second insert 502 of the second-order upper die leave the punch holder 401 and the punch body 402, the second-order lower die spring 304 resets, thereby driving the floating punch 400 to move upward. The floating punch 400 drives the product upward to leave the second-order lower die support 302. Since the product is held on the punch body 402, the product is slid to the end of the punch body 402 and removed, facilitating product removal. This completes the compression molding process of the closed-loop clamp (see...). Figure 11 ,in, Figure 11 The middle punch body 402 has been detached from the second-stage lower die holder 300, and the product has been detached from the punch body 402.
[0090] See Figure 16 This diagram illustrates the process changes of the intermediate material plate being formed into a closed interlocking clamp product according to this invention. This invention employs a two-stage forming process. The first stage processes the arc segments at both ends and the sides of the material plate. The second stage performs secondary forming based on the first-stage structure, processing the arc segment in the middle of the material plate. During the second-stage forming process, the arc segment formed in the first stage flips upwards, forming a near-circular closed interlocking clamp structure. This reduces the amount of part shaping and ensures the consistency of part forming. It is suitable for stamping and forming closed interlocking clamps from thin or thick sheet metal.
[0091] The difference between this invention and traditional mold forming schemes lies in the fact that the first-stage forming process of traditional schemes only involves flanging the two sides of the part. However, using the first-stage forming mold of this invention, a middle material plate structure with arc segments on both sides and a straight section in the middle can be processed in the first stage, simultaneously forming the shape of the two end sides. This ensures that the diameter of the two arc segments is the same as the diameter of the final clamp product, effectively pre-forming the arc segments of the final clamp product. This pre-forming plays a crucial role in reducing springback after the final arc forming, greatly reducing the difficulty of debugging the second-stage forming mold and improving debugging efficiency. This invention also employs an upper and lower suspended pressure structure to ensure stable positioning of the part during initial positioning, a prerequisite for ensuring part accuracy and ensuring stability and reliability during the forming process. Particularly noteworthy is the second-stage process, which creatively uses a floating positioning cylindrical punch body, ensuring forming accuracy while also solving the problems of feeding and unloading the closed clamp and punch interference.
[0092] 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 closed-type plug-in clamp forming mold assembly, characterized in that, The system includes a first-order forming mold and a second-order forming mold. The first-order forming mold includes a first-order lower mold base (100) and a first-order upper mold base (200). The first-order lower mold base (100) is provided with a first-order lower mold insert (101), a first-order material ejector (102), and a first-order lower ejection spring (104). The first-order lower mold insert (101) is fixedly installed on the first-order lower mold base (100), and the first-order material ejector (102) is movably installed on the first-order lower mold base (100). The first-order lower mold insert (101) is located at the end of the first-order material ejector (102), and the first-order lower ejection spring (104) is located below the first-order material ejector (102). The bottom surface of (102) contacts the top surface of the first-order lower ejector spring (104). The middle part of the upper surface of the first-order material ejector (102) is a rectangular plane, and the two ends of the rectangular plane are first-order arc-shaped concave surfaces. The first-order upper mold base (200) includes a first-order upper mold insert (201) and a first-order pressure platen (204). The first-order pressure platen (204) is movably installed on the first-order upper mold insert (201). The bottom surface of the first-order pressure platen (204) is a plane. The first-order pressure platen (204) is set corresponding to the rectangular plane of the first-order material ejector (102). The shape of the lower surface of the first-order upper mold insert (201) is adapted to the upper surface of the first-order material ejector (102).
2. The closed-loop clamp forming mold assembly according to claim 1, characterized in that, The upper die holder (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 upper die holder (204).
3. The closed-loop clamp forming mold assembly according to claim 2, characterized in that, Multiple sequential lower ejector springs (104) are provided, and the sequential lower ejector springs (104) are nitrogen springs, and the sequential upper ejector springs (203) are nitrogen springs.
4. The closed-loop clamp forming mold assembly according to any one of claims 1-3, characterized in that, The two-stage forming mold includes a lower mold base (300) and an upper mold base (500). The lower mold base (300) is provided with a lower mold insert (301), a lower mold support (302), and a floating punch (400). The lower mold insert (301) is fixedly installed on the lower mold base (300). The lower mold support (302) is movably installed on the lower mold insert (301). The floating punch (400) is movably installed on the lower mold insert (301). 02) has a two-stage arc-shaped concave surface in the upper middle part; the floating punch (400) includes a punch seat (401) and a punch body (402) installed perpendicularly on the side of the punch seat (401), the punch body (402) is cylindrical; the two-stage upper die seat (500) is provided with a two-stage upper die first insert (501) and a two-stage upper die second insert (502), the two-stage upper die first insert (501) is set corresponding to the punch seat (401), and the two-stage upper die second insert (502) is set corresponding to the punch body (402).
5. The closed-loop clamp forming mold assembly according to claim 4, characterized in that, The second-order lower die insert (301) is provided with a punch floating groove (307) for mounting the floating punch (400). The punch floating groove (307) is located on one side of the second-order lower die support (302). The punch seat (401) is movably inserted into the punch floating groove (307). The bottom surface of the punch floating groove (307) is provided with a second-order lower die spring (304). There are at least two second-order lower die springs (304).
6. The closed-loop clamp forming mold assembly according to claim 5, characterized in that, The upper side of the punch body (402) is provided with a pressing plane (403), the end face of the second insert (502) of the second-order upper die is a plane, the end face of the first insert (501) of the second-order upper die is a plane, the top surface of the punch seat (401) is a plane, and there are two first inserts (501) of the second-order upper die.
7. The closed-loop clamp forming mold assembly according to claim 3, characterized in that, The first-order upper mold insert (201) is provided with a square through hole for installing the first-order pressure device (204), and a limiting platform is provided at the inner end of the square through hole. The first-order pressure device (204) is provided with a corresponding boss.
8. The closed-loop clamp forming mold assembly according to claim 1, characterized in that, The first-order ejector (102) is provided with a first-order side positioning member (103) on both sides; the first-order ejector (102) and the first-order lower mold insert (101) are respectively provided with a first-order end positioning member (108) at opposite ends.
9. The closed-loop clamp forming mold assembly according to claim 4, characterized in that, The second-order lower mold insert (301) is provided with two sets of second-order side positioning members (303), and the two sets of second-order side positioning members (303) are respectively located at both ends of the second-order lower mold support member (302). Each set includes two second-order side positioning members (303) arranged opposite to each other. The second-order lower mold insert (301) is provided with second-order end positioning members (306), and two second-order end positioning members (306) are arranged opposite to each other. The two second-order end positioning members (306) are respectively located at both ends of the second-order lower mold support member (302).
10. The closed-loop clamp forming mold assembly according to claim 4, characterized in that, The first-order lower mold base (100) is provided with a first-order guide post (105), and the first-order upper mold base (200) is provided with a corresponding first-order guide sleeve (202); the second-order lower mold base (300) is provided with a second-order guide post (305), and the second-order upper mold base (500) is provided with a corresponding second-order guide sleeve (503).