Extrusion forming hole flanging heightening structure

Abstract

The utility model provides an extrusion forming hole flanging heightening structure. The extrusion forming hole flanging heightening structure comprises an upper die assembly and a lower die assembly arranged under the upper die assembly. An upper clamping plate insert core is installed in an upper clamping plate in the upper die assembly, a hole flanging male die facing the lower die assembly is installed in the upper clamping plate insert core, the hole flanging male die penetrates through the upper stripping plate, a lower die insert is installed in the lower die assembly and corresponds to the hole flanging male die, and a floating positioning pin coaxial with the hole flanging male die is further arranged in the lower die insert. A part side face pressing unit is further installed in the upper die assembly and the lower die assembly. Thinning extrusion is achieved through the part side face pressing unit, the hole flanging height is increased, namely the effective length of threads after tapping is increased, and connection is firmer after the part side face pressing unit and a screw are assembled. Reliable positioning of the part and no deformation of the appearance during hole flanging can be guaranteed; meanwhile, the outward acting force during extrusion hole flanging is counteracted, the lower die insert is not prone to damage, the replacement cost is reduced, the replacement time is shortened, the part quality is guaranteed, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of punching dies, in particular to the technical field of hole-turning and height-increasing, and specifically is an extrusion-molded hole-turning and height-increasing structure. Background Art

[0002] At present, with the industrialized production of parts, the requirements for punching dies are gradually increasing. In CNC turret punching, punching compound dies are mostly used, that is, pre-punching holes are punched first, and then flanging is performed on the basis of the pre-punching holes.

[0003] However, in practice, it is found that the height of the flange formed by this type of mold is often not high, which makes the subsequent processing steps of the punching and flanging, such as processing threads on the flanging, extremely difficult and cannot meet the needs of many products. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an extruded hole-turning and height-increasing structure to solve the difficulties of the prior art.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides an extrusion-molded hole-turning and height-increasing structure, comprising an upper die assembly and a lower die assembly arranged directly below the upper die assembly;

[0006] An upper clamping plate insert 6 is installed in the upper clamping plate 5 in the upper die assembly, and a punch 7 facing the lower die assembly is installed in the upper clamping plate insert 6. The punch 7 is set through the upper stripping plate 9.

[0007] A lower die insert 18 is installed in the lower die assembly corresponding to the hole-turning punch 7, and a floating positioning pin 20 coaxially arranged with the hole-turning punch 7 is also arranged in the lower die insert 18;

[0008] The upper die assembly and the lower die assembly are also provided with a part side pressing unit;

[0009] The part is placed on top of the lower die insert 18 and between the part side hold-down units and the lower die insert 18 .

[0010] According to the preferred solution, the upper die assembly is provided with an upper die seat 1, an upper clamping plate 5 and an upper stripping plate 9 in sequence along the direction close to the lower die assembly;

[0011] The upper die base 1 is provided with a spring 2, an upper pad 3 and a contour sleeve 4;

[0012] An upper clamping plate insert 6 is installed in the upper clamping plate 5 , and the punch 7 is installed in the upper clamping plate insert 6 .

[0013] According to a preferred embodiment, a plurality of springs 2 are arranged around the upper die base 1 .

[0014] According to the preferred solution, the lower mold assembly is provided with a lower mold plate 14, a lower pad 22 and a lower mold base 23 in sequence along the direction close to the upper mold assembly;

[0015] The lower mold plate 14 is provided with an inner limit stop 17 and a lower mold insert 18. The top of the inner limit stop 17 protrudes out of the lower mold plate 14 and is disposed under the upper stripping plate 9.

[0016] A through hole is formed in the lower mold insert 18 for passing the floating positioning pin 20 , and a nitrogen spring 21 is connected to the bottom of the floating positioning pin 20 .

[0017] According to the preferred embodiment, the part side pressing unit includes an insert block 10 and a stop block 16;

[0018] An insert block 10 is also installed in the upper stripping plate 9 in the upper mold assembly, and the bottom of the insert block 10 also extends out of the upper stripping plate 9;

[0019] A stopper 16 tangentially arranged with the inserting block 10 is installed in the lower template 14 .

[0020] According to a preferred embodiment, the insert block 10 is disposed on the side of the punch 7 , and the stop block 16 is disposed on the side of the lower die insert 18 .

[0021] According to the preferred solution, the lower die base 23 is connected to the lower pad 24, and the lower pad 24 is connected to the lower support plate 25;

[0022] Coaxial through holes are provided in the lower die insert 18 , the lower pad 22 , the lower die base 23 and the lower pad 24 . The nitrogen spring 21 is installed in the lower pad 24 , and the top extends into the lower die base 23 to connect with the floating positioning pin 20 .

[0023] According to a preferred embodiment, a positioning pin 19 is also installed in the lower template 14 .

[0024] According to the preferred embodiment, an inner guide post 8 is installed in the upper clamping plate 5, and the inner guide post 8 passes through the upper stripping plate 9, the lower mold plate 14 and the lower pad 22 in sequence during the movement toward the lower mold assembly;

[0025] An upper inner guide sleeve 11 and a lower inner guide sleeve 15 are respectively arranged in the upper stripping plate 9 and the lower template 14 corresponding to the movement of the inner guide column 8.

[0026] According to the preferred solution, the upper die base 1 is connected to the upper limit column 12 and the outer guide column 13 at the bottom, and the lower limit column 26 and the outer guide sleeve 27 are connected to the lower die base 23 accordingly.

[0027] The utility model adopts a side pressing unit of a part to achieve thinning and extrusion while meeting the thread strength and torque of tapping after hole turning, and increases the hole turning height, that is, increases the effective length of the thread after tapping, which is conducive to a tighter connection after assembly with a screw;

[0028] In addition, since the hole is close to the edge of the part, the insert and stopper in the side clamping unit of the part are used to limit the part, which not only ensures the reliable and accurate positioning of the part, but also ensures that the shape of the part will not be deformed when the hole is turned;

[0029] In addition, the insert block and the stopper offset the outward force during extrusion and hole turning through the parts, which is beneficial to the lower die insert of the hole turning not being easily damaged, reducing the cost and time of replacing the lower die insert, ensuring the stability of part quality and improving production efficiency.

[0030] The best embodiment of the present invention will be described in more detail below in conjunction with the accompanying drawings so that the features and advantages of the present invention can be easily understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The display is a schematic diagram of the structure of the utility model;

[0032] Figure 2 Shown is a top view of the utility model;

[0033] Description of symbols

[0034] 1. Upper die seat; 2. Spring; 3. Upper pad; 4. Equal height sleeve; 5. Upper clamping plate; 6. Upper clamping plate insert; 7. Flanging punch; 8. Inner guide pin; 9. Upper stripping plate; 10. Insert block; 11. Upper inner guide sleeve; 12. Upper limit pin; 13. Outer guide pin; 14. Lower template; 15. Lower inner guide sleeve; 16. Stop block; 17. Inner limit; 18. Lower die insert; 19. Locating pin; 20. Floating locating pin; 21. Nitrogen spring; 22. Lower pad; 23. Lower die seat; 24. Lower pad; 25. Lower support plate; 26. Lower limit pin; 27. Outer guide sleeve. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the technical solution of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in conjunction with the drawings of the specific embodiments of the utility model. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Compared with the embodiments shown in the drawings, feasible implementations within the scope of protection of the present invention may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0037] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate quantity restrictions. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] The utility model provides an extrusion-molded hole-flanging and height-increasing structure, which is used in punching and flanging. The utility model does not limit the type of product, but the extrusion-molded hole-flanging and height-increasing structure is particularly suitable for thread processing.

[0039] In general, the extrusion forming hole-turning and height-increasing structure proposed in the utility model mainly includes an upper die assembly and a lower die assembly arranged directly below the upper die assembly. Figure 1 , which shows the arrangement relationship between the upper mold assembly and the lower mold assembly.

[0040] In order to achieve the purpose of adapting to the subsequent processing after punching and flanging, and to solve the problem in the background technology that the height of the flanging formed by using this type of mold is often not high, which makes the subsequent processing steps of punching and flanging, such as processing threads on the flanging, extremely difficult and unable to meet the needs of many products, in the technical solution provided in this embodiment, a part side clamping unit is installed on the side of the corresponding part lower die insert 18 in the upper die assembly and the lower die assembly, and the part side clamping unit is used to achieve thinning and extrusion on the basis of meeting the thread strength and torque of tapping after flanging. Pressure increases the height of the hole, that is, it increases the effective length of the thread after tapping, which is beneficial to a tighter connection after assembly with screws; in addition, since the hole is relatively close to the edge of the part, the insert and stopper in the side clamping unit of the part are used to limit the part, which not only ensures the reliable and accurate positioning of the part, but also ensures that the shape of the part does not deform when the hole is flipped; in addition, the insert and stopper offset the outward force during extrusion and flipping through the part, which is beneficial to the lower die insert of the hole not being easily damaged, reducing the cost and time of replacing the lower die insert, ensuring the stability of part quality, and improving production efficiency.

[0041] Specifically, Figure 1 As shown, the upper die assembly is provided with an upper die seat 1, an upper clamping plate 5 and an upper stripping plate 9 in sequence along the direction close to the lower die assembly; a spring 2, an upper pad 3 and a height-equalizing sleeve 4 are installed in the upper die seat 1; an upper clamping plate insert 6 is installed in the upper clamping plate 5, and a hole-turning punch 7 facing the lower die assembly is installed in the upper clamping plate insert 6, and the hole-turning punch 7 is arranged through the upper stripping plate 9;

[0042] In the upper die assembly, in order to balance the downward stripping force of the upper stripping plate 9 during the stripping process, multiple springs 2 are arranged around the upper die base 1, which is beneficial to ensure force balance, avoid local stress concentration and deformation, and ensure the stability of the structure when the parts are stripped.

[0043] Similarly, if Figure 1 As shown, the lower mold assembly is provided with a lower mold plate 14, a lower pad 22 and a lower mold base 23 in sequence along the direction close to the upper mold assembly, a lower pad 24 is connected under the lower mold base 23, and a lower support plate 25 is connected under the lower pad 24;

[0044] Considering the corresponding punch 7 in the upper die assembly, a lower die insert 18 is installed in the lower die plate 14, a part is arranged on the top of the lower die insert 18, and a through hole for passing the floating locating pin 20 is arranged in the lower die insert 18 corresponding to the punch 7. In addition, a nitrogen spring 21 is connected to the bottom of the floating locating pin 20 along the coaxial direction of the floating locating pin 20. The nitrogen spring 21 can also realize the effect of ejecting the part upward from the lower die insert 18 under the action of the floating locating pin 20;

[0045] In addition, an internal limit 17 is installed in the lower template 14. The top of the internal limit 17 protrudes from the lower template 14 and is arranged under the upper stripping plate 9. When the upper mold assembly moves downward, the internal limit 17 can be used to contact the upper stripping plate 9 in the upper mold assembly and restrict its continued downward movement, thereby achieving a preliminary limiting effect.

[0046] Taking into account that the nitrogen spring 21 is farther away than the parts, in order to keep the force of the nitrogen spring 21 in a vertical state at all times, coaxially arranged through holes are provided in the lower die insert 18, the lower pad 22, the lower die base 23 and the lower pad 24. The nitrogen spring 21 is installed in the lower pad 24, and the top extends into the lower die base 23 to be connected to the floating locating pin 20.

[0047] As mentioned above, in order to facilitate the accurate positioning and installation of the parts to be stamped on the lower die insert 18, the following adjustments are made in this embodiment;

[0048] On the one hand, the lower mold insert 18 is also equipped with positioning pins 19 around the floating positioning pins 20, which are also used for rapid positioning of parts;

[0049] On the other hand, the part is placed on the top of the lower die insert 18 and between the part side clamping unit and the lower die insert 18. Since the insert block 10 in the part side clamping unit is located on the side of the punch 7 and the stop block 16 is located on the side of the lower die insert 18, the punching hole is relatively close to the edge of the part. The insert block 10 and the stop block 16 in the part side clamping unit are used to limit the part, which not only ensures the reliable and accurate positioning of the part, but also ensures that the shape of the part does not deform during the punching hole.

[0050] It should be specifically explained that the side clamping of the part includes an insert block 10 and a stopper 16. The insert block 10 is installed in the upper stripping plate 9 in the upper mold assembly, and the bottom of the insert block 10 also extends out of the upper stripping plate 9; the lower mold plate 14 is installed with a stopper 16 tangent to the insert block 10; because the insert block 10 and the stopper 16 squeeze each other during movement, the squeezing force is dispersed toward both sides, resulting in squeezing force on the side parts, making the parts thinner in the vertical direction, increasing the height of the hole, that is, increasing the effective length of the thread after tapping, which is conducive to a tighter connection after assembly with screws;

[0051] In addition, the insert block 10 and the stopper 16 offset the outward force during extrusion and hole punching through the parts, which is beneficial to prevent the lower die insert 18 of the hole punching from being easily damaged, reducing the cost and time of replacing the lower die insert 18, ensuring the stability of part quality, and improving production efficiency.

[0052] On this basis, preferably, in this embodiment, a guide structure is further provided between the upper mold assembly and the lower mold assembly, which is divided into an internal guide structure and an external guide structure. The internal guide structure refers to an inner guide post 8 installed in the upper clamping plate 5. The inner guide post 8 passes through the upper stripping plate 9, the lower mold plate 14 and the lower pad 22 in sequence during the movement toward the lower mold assembly. Correspondingly, an upper inner guide sleeve 11 and a lower inner guide sleeve 15 are provided in the upper stripping plate 9 and the lower mold plate 14 respectively corresponding to the movement of the inner guide post 8. The upper inner guide sleeve 11 and the lower inner guide sleeve 15 can reduce the direct contact between the inner guide post 8 and other parts of the mold, thereby significantly reducing the degree of wear of the inner guide post, and avoiding the deformation of the inner guide post 8 caused by long-term use and frequent mold opening and closing actions;

[0053] The external guide structure refers to the upper limit column 12 and the outer guide column 13 connected to the upper mold base 1, and the corresponding lower limit column 26 and the outer guide sleeve 27 are connected to the lower mold base 23, so as to achieve the limiting effect on the overall structure of the upper mold assembly and the lower mold assembly.

[0054] The stamping process includes the following steps:

[0055] S1: During punching, the power device drives the punch press slide to lift the upper die as a whole, so that the upper die is separated from the lower die;

[0056] S2: At this time, the part is placed on the lower mold insert 18, and the positioning is completed by using the positioning pin 19 and the floating positioning pin 20;

[0057] S3: The upper die moves vertically downward under the action of the power device and the punch slide, and the outer guide pin 13 enters the outer guide sleeve 27 to complete the guidance of the die;

[0058] S4: The upper die continues to move downward as a whole, and the insert block 10 first contacts the stopper 16 and presses the side of the part under the action of the stopper 16;

[0059] S5: Continue to move downward, the upper stripping plate 9 first contacts the upper surface of the part and presses the part downward, and at the same time, the upper stripping plate 9 contacts and restricts the inner limit 17, and then the upper stripping plate 9 no longer moves downward;

[0060] S6: Continue to move downward, the punch 7 starts to squeeze the part material into the lower die insert 18 under the guidance of the upper clamping plate 5, and at the same time drives the movable positioning pin 20 to move downward;

[0061] S7: Finally, the upper stripping plate 9 and the lower clamping plate 5 are in contact and locked; the lower limit post 12 and the upper limit post 26 are in contact and locked, and the upper die reaches the lower dead point, and the product extrusion and hole turning are completed;

[0062] S8: After the stamping is completed, the upper die moves upward under the action of the power device to separate the upper die from the lower die. First, the upper stripper plate 9 is pulled downward from the hole-turning punch 7 under the action of the spring 2 force, and then the movable positioning pin 20 is pushed upward from the lower die insert 18 under the action of the nitrogen spring 21. At this time, all components of the upper die and the lower die of the mold are restored to their initial positions, the parts are taken out, and the next stamping process can be carried out.

[0063] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. An extrusion-molded hole-turning height-increasing structure, characterized in that: It includes an upper mold assembly and a lower mold assembly arranged directly below the upper mold assembly; An upper clamping plate insert (6) is installed in the upper clamping plate (5) in the upper die assembly, and a punch (7) facing the lower die assembly is installed in the upper clamping plate insert (6). The punch (7) passes through the upper stripping plate (9). A lower die insert (18) is installed in the lower die assembly corresponding to the hole-turning punch (7), and a floating positioning pin (20) coaxially arranged with the hole-turning punch (7) is also arranged in the lower die insert (18); The upper die assembly and the lower die assembly are also provided with a part side pressing unit; The part is placed on top of the lower die insert (18) and between the part side hold-down unit and the lower die insert (18).

2. The extrusion-molded hole-turning and height-increasing structure according to claim 1, characterized in that: The upper die assembly is provided with an upper die seat (1), an upper clamping plate (5) and an upper stripping plate (9) in sequence along a direction close to the lower die assembly; The upper die seat (1) is provided with a spring (2), an upper pad (3) and a height-conforming sleeve (4); An upper clamping plate insert (6) is installed in the upper clamping plate (5), and the punch (7) is installed in the upper clamping plate insert (6).

3. The extrusion-molded hole-turning and height-increasing structure according to claim 2, characterized in that: The lower die assembly is provided with a lower die plate (14), a lower pad (22) and a lower die seat (23) in sequence along a direction close to the upper die assembly; An inner limit stop (17) and a lower mold insert (18) are installed in the lower mold plate (14); the top of the inner limit stop (17) protrudes out of the lower mold plate (14) and is disposed under the upper stripping plate (9); A through hole for passing a floating positioning pin (20) is provided in the lower mold insert (18), and a nitrogen spring (21) is connected to the bottom of the floating positioning pin (20).

4. The extrusion-molded hole-turning and height-increasing structure according to claim 3 is characterized in that: The part side pressing unit comprises an insert block (10) and a stop block (16); An insert block (10) is also installed in the upper stripping plate (9) in the upper mold assembly, and the bottom of the insert block (10) also extends out of the upper stripping plate (9); A stopper (16) is installed in the lower template (14) and is arranged tangentially to the inserting block (10).

5. The extrusion-molded hole-turning and height-increasing structure according to claim 4, characterized in that: The lower die base (23) is connected to a lower pad (24) below, and the lower pad (24) is connected to a lower support plate (25) below; The lower die insert (18), the lower pad (22), the lower die base (23) and the lower pad (24) are provided with coaxially arranged through holes, and the nitrogen spring (21) is installed in the lower pad (24), and the top extends into the lower die base (23) to be connected with the floating positioning pin (20).

6. The extrusion-molded hole-turning and height-increasing structure according to claim 5, characterized in that: A positioning pin (19) is also installed in the lower template (14).

7. The extrusion-molded hole-turning and height-increasing structure according to claim 6, characterized in that: An inner guide post (8) is installed in the upper clamping plate (5), and the inner guide post (8) passes through the upper stripping plate (9), the lower mold plate (14) and the lower pad (22) in sequence during the process of moving toward the lower mold assembly; An upper inner guide sleeve (11) and a lower inner guide sleeve (15) are respectively arranged in the upper stripping plate (9) and the lower template (14) corresponding to the movement of the inner guide column (8).

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