Composite die for one-time forming of clamp

Abstract

The invention relates to the field of hoop forming, in particular to a composite die for one-time forming of a hoop, which comprises a base and a progressive die arranged on the base, and the progressive die comprises a plate shearing forming die, a flanging die, an outer side multi-stage bending die, a head punching die, an inner side multi-stage bending die and a shearing die which are sequentially arranged; the plate shearing forming die pretreats and punches the plates into integrally connected product sheets; the flanging die is used for flanging the outer parts of the two sides of the product sheet into a blank I; the outer side multi-stage bending die comprises a plurality of groups of outer side bending dies, and the outer side of the first blank is subjected to multiple times of bending forming through the plurality of groups of outer side bending dies to form a second blank; a head punching die punches the two ends of the second blank to form a third blank; the inner side multi-stage bending die comprises a plurality of groups of inner side bending dies, and the inner side of the third blank is bent for multiple times through the plurality of groups of inner side bending dies to form a fourth blank; the shearing die cuts off the integrally-connected fourth blank to form the single hoops, one-time forming of the hoops from a plate to a finished product is achieved, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of clamp forming, and relates to a composite die for one-time forming of a clamp. Background Art

[0002] In the existing clamp forming production process, the problem of non-one-time forming generally exists. Traditional production methods often require a series of processing techniques such as sheet metal shearing, flanging, bending, and punching to be carried out sequentially on different equipment. For example, the sheet metal is first cut into appropriate sizes and shapes on a shearing machine, then transferred to a flanging device for flanging, then transported to a bending machine for bending forming, and finally the punching process is completed on a punching press. This production mode with multiple equipment and multiple processes has many drawbacks: on the one hand, frequent equipment conversion and material handling increase the production time, resulting in low production efficiency; on the other hand, multiple clamping and processing are prone to cause the accumulation of product size errors, affecting the stability of product quality; in addition, the use of multiple pieces of equipment also increases the equipment procurement, maintenance costs, and floor area, increasing the production cost of the enterprise. Therefore, there is an urgent need for an efficient production die that can achieve one-time forming of the clamp to solve the problems existing in the existing production process. Summary of the Invention

[0003] In order to solve the problems of the existing technology, the present invention provides a composite die for one-time forming of a clamp.

[0004] The object of the present invention can be achieved by the following technical solutions: A composite die for one-time forming of a clamp includes: a base, a progressive die provided on the base, a power module for driving the progressive die to punch downward and a jacking module for driving the product to be ejected are also provided on the base, a feeding component for the step-by-step movement of the product blank is provided on one side of the base, and the progressive die includes a shearing and forming die, a flanging die, an outer multi-stage bending die, a head punching die, an inner multi-stage bending die, and a shearing die arranged in sequence;

[0005] The shearing and forming die pre-treats and punches the sheet metal into a product sheet connected integrally;

[0006] The flanging die flanges the outer sides of both sides of the product sheet into blank one;

[0007] The outer multi-stage bending die includes multiple groups of outer bending dies, and the outer side of blank one is bent multiple times by the multiple groups of outer bending dies to form blank two;

[0008] The head punching die punches the two end parts of blank two to form blank three;

[0009] The inner multi-stage bending die includes multiple groups of inner bending dies, and the inner side of blank three is bent multiple times by the multiple groups of inner bending dies to form blank four;

[0010] The shearing die cuts the integrally connected blank into four pieces to form individual clamps.

[0011] For further improvement, the shearing and forming die includes a lower shearing die and an upper shearing die. Along the feeding direction, two sets of symmetrically arranged outer punching holes, first inner punching holes, second inner punching holes, and edge punching holes are successively arranged at intervals on the lower shearing die and the upper shearing die. The outer punching holes are located outside the sum of the first inner punching holes and the second inner punching holes. Step positioning holes are centrally arranged at intervals between the lower shearing die and the upper shearing die. The die head of the power module passes through the two sets of outer punching holes, first inner punching holes, second inner punching holes, edge punching holes, and step positioning holes on the upper shearing die to pre-process and punch the sheet material into an integrally connected product sheet.

[0012] For further improvement, an inner blank pressing die is provided in the flanging die, the outer multi-stage bending die, and the head punching die. The inner blank pressing die includes an inner lower die base and an upper die pressing plate. A step positioning hole is centrally arranged in the inner lower die base. Under the action of the power module, the upper die pressing plate presses the first blank, the second blank, and the third blank on the inner lower die base.

[0013] For further improvement, the flanging die includes two sets of symmetrically arranged upper flanging dies and a first lower die base. The upper ends of the upper flanging dies are connected to the power module. An outer flanging groove for the product sheet is provided in the first lower die base. A first top head placed in the outer flanging groove for the product sheet is provided at the lower ends of the upper flanging dies.

[0014] For further improvement, the outer multi-stage bending die includes a first-stage outer bending die and a second-stage outer bending die. The first-stage outer bending die includes two sets of symmetrically arranged upper first-stage outer bending dies and a second lower die base. The upper ends of the upper first-stage outer bending dies are connected to the power module. A first outer bending groove for the blank is provided in the second lower die base. A second top head that is matched and placed in the first outer bending groove for the blank is provided at the lower ends of the upper first-stage outer bending dies. The first outer bending groove for the blank includes a blank head bending groove. The second-stage outer bending die includes two sets of symmetrically arranged upper second-stage outer bending dies and a third lower die base. The upper ends of the upper second-stage outer bending dies are connected to the power module. A second outer bending groove for the blank is provided in the third lower die base. A third top head placed in the second outer bending groove for the blank is provided at the lower ends of the upper second-stage outer bending dies. The second outer bending groove for the blank is located inside the first outer bending groove for the blank.

[0015] Further improvement: The head punching die includes an upper head punching die and a lower die base IV. The upper end of the upper head punching die is connected to a power module. An outer blank bending groove III is provided in the lower die base IV. A pressing plate is connected to the lower end of the upper head punching die. A punch is provided in the upper head punching die, and the punch passes through the pressing plate. A limiting plate is provided at the upper end of the lower die base IV. The limiting plate is located below the pressing plate and has a groove inside for the blank II to enter. A middle blank pressing plate is provided at the lower end of the upper die pressing plate in the inner blank pressing die. The middle blank pressing plate is located directly above the outer blank bending groove III.

[0016] Further improvement: The inner multi-stage bending die includes a first-stage inner bending die and a second-stage inner bending die. The first-stage inner bending die includes two groups of symmetrically arranged upper first-stage inner bending dies and a lower die base V. The upper end of the upper first-stage inner bending die is connected to a power module. An inner blank bending groove I is provided in the lower die base V. A W-shaped top head placed in the inner blank bending groove I is provided at the lower end of the upper first-stage inner bending die. Three-step positioning holes are provided on the lower die base V. The second-stage inner bending die includes two groups of symmetrically arranged upper second-stage inner bending dies and a lower die base VI. The upper end of the upper second-stage inner bending die is connected to a power module. The two sides of the lower die base VI are convex upward towards the center. An inner blank bending groove II matching the protrusion of the lower die base VI is provided in the upper second-stage inner bending die. Two groups of the inner blank bending grooves II are arranged at intervals. Four-step positioning holes are provided on the lower die base VI.

[0017] Further improvement: The shearing die includes an upper shearing die and a lower shearing die base. The upper end of the upper shearing die is connected to a power module. A shearing groove is provided in the lower shearing die base. The cutting head of the upper shearing die is located in the shearing groove.

[0018] Further improvement: The two end parts of the blank III are unfolded outward by the cooperation of the W-shaped top head and the inner blank bending groove I, and the unfolding angle is 15 degrees to 20 degrees.

[0019] Compared with the prior art, the beneficial effects of the composite die for one-time forming of the clamp of the present invention are as follows:

[0020] Adopting a one-time forming progressive die structure, integrating a shearing and forming die, a flanging die, a multi-stage bending die, a punching die and a shearing die, realizing the one-time forming of the clamp from the sheet material to the finished product, significantly improving the production efficiency, reducing equipment conversion and material handling, and shortening the production cycle; reducing costs, reducing equipment procurement, maintenance and floor area; improving quality stability, avoiding the accumulation of dimensional errors caused by multiple clamping, and improving product accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the present invention

[0022] Figure 2 isFigure 1 Schematic diagram of a structure with some parts hidden

[0023] Figure 3 For Figure 2 Schematic diagram of a structure with some parts hidden

[0024] Figure 4 Schematic diagram of the structure of the upper and lower die splitting of the present invention

[0025] Figure 5 Schematic diagram of the upper die of the present invention

[0026] Figure 6 Schematic diagram of the lower die of the present invention

[0027] Figure 7 Schematic diagram of the structure of the head punching die in the present invention

[0028] Figure 8 Schematic diagram of the structure for product forming

[0029] In the figure, 1 - base, 2 - progressive die, 21 - power module, 22 - jacking module, 23 - feeding component, 3 - shearing and forming die, 31 - lower shearing die, 32 - upper shearing die, 33 - outer punching hole, 34 - inner punching hole 1, 35 - inner punching hole 2, 36 - edge punching and cutting hole, 37 - step positioning hole 1, 4 - flanging die, 41 - upper flanging die, 42 - lower die base 1, 43 - external flanging groove of product sheet, 44 - top head 1, 5 - outer multi - stage bending die, 51 - first - stage outer bending die, 511 - upper die of first - stage outer bending die, 512 - lower die base 2, 513 - outer bending groove of blank 1, 514 - top head 2, 515 - head bending groove of blank, 52 - second - stage outer bending die, 521 - upper die of second - stage outer bending die, 522 - lower die base 3, 523 - outer bending groove of blank 2, 524 - top head 3, 6 - head punching die, 61 - upper head punching die, 62 - lower die base 4, 63 - outer bending groove of blank 3, 64 - pressing plate, 65 - punch, 66 - limiting plate, 67 - middle pressing plate of blank, 7 - inner multi - stage bending die, 71 - first - stage inner bending die, 711 - upper die of first - stage inner bending die, 712 - lower die base 5, 713 - inner bending groove of blank 1, 714 - W - shaped top head, 715 - step positioning hole 3, 72 - second - stage inner bending die, 721 - upper die of second - stage inner bending die, 722 - lower die base 6, 723 - inner bending groove of blank 2, 724 - step positioning hole 4, 8 - shearing die, 81 - upper shearing die, 82 - lower shearing die base, 83 - shearing groove, 84 - cutting head, 9 - inner pressing die of blank, 91 - lower die base of inner blank, 92 - upper pressing plate, 93 - step positioning hole 2, A - clamp forming sheet. Detailed implementation mode

[0030] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0031] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The following combines the embodiments and the attached Figures 1 to 8 , and further elaborates on the technical solutions of the present invention.

[0033] Embodiment 1

[0034] A composite die for one-time forming of a clamp, comprising: a base 1, a progressive die 2 provided on the base 1, a power module 21 for driving the progressive die 2 to punch downward and a jacking module 22 for driving the product to be ejected are also provided on the base 1. A feeding assembly 23 for the step-by-step movement of the product blank is provided on one side of the base 1. The progressive die 2 includes a shearing and forming die 3, a flanging die 4, an outer multi-stage bending die 5, a head punching die 6, an inner multi-stage bending die 7, and a shearing die 8 arranged in sequence;

[0035] The shearing and forming die 3 pre-treats and punches the sheet material into a product sheet connected integrally;

[0036] The flanging die 4 flanges the outside of both sides of the product sheet into blank one;

[0037] The outer multi-stage bending die 5 includes multiple groups of outer bending dies, and the outside of blank one is bent multiple times by the multiple groups of outer bending dies to form blank two;

[0038] The head punching die 6 punches holes at both ends of blank two to form blank three;

[0039] The inner multi-stage bending die 7 includes multiple groups of inner bending dies, and the inside of blank three is bent multiple times by the multiple groups of inner bending dies to form blank four;

[0040] The shearing die 8 cuts and forms the integrally connected blank four into individual clamps.

[0041] The working principle of the present invention:

[0042] The composite die for one-time forming of the clamp realizes the one-time forming of the clamp through the coordinated work of the base, progressive die, power module, jacking module and feeding component. The feeding component feeds the sheet into the die, and the power module drives the progressive die to process the sheet in sequence. The shearing and forming die in the progressive die first preprocesses the sheet and stamps it into a product sheet connected integrally; then the flanging die flanges the outer sides of both sides of the product sheet to form blank one; the outer multi-stage bending die bends the outer side of blank one multiple times through multiple groups of outer bending dies to obtain blank two; the head punching die punches the two ends of blank two to form blank three; the inner multi-stage bending die bends the inner side of blank three multiple times by using multiple groups of inner bending dies to obtain blank four; finally, the shearing die cuts off the integrally connected blank four to form a single clamp. During the whole process, the sheet passes through each process in the die in sequence, without manual transfer and multi-equipment processing.

[0043] The one-time forming of the clamp is realized. Compared with the traditional production process, the production efficiency is greatly improved, and the production time and the number of material handling are reduced; at the same time, due to the reduction of multiple clamping and equipment conversion, the possibility of the accumulation of product size errors is reduced, and the stability of product quality is improved; in addition, all processes are completed by one set of die, reducing the equipment procurement and maintenance costs and lowering the production cost of the enterprise.

[0044] As a further preferred embodiment, the shearing and forming die 3 includes a shearing lower die 31 and a shearing upper die 32. Two groups of symmetrical outer punching holes 33, inner punching holes one 34, inner punching holes two 35 and edge punching and breaking holes 36 are arranged at intervals along the feeding direction on the shearing lower die 31 and the shearing upper die 32. The outer punching holes 33 are located outside the sum of the inner punching holes one 34 and the inner punching holes two 35. Step positioning holes one 37 are arranged at intervals in the center of the shearing lower die 31 and the shearing upper die 32. The die head of the power module 21 passes through the two groups of outer punching holes 33, inner punching holes one 34, inner punching holes two 35, edge punching and breaking holes 36 and step positioning holes one 37 on the shearing upper die 32 to preprocess and stamp the sheet into a product sheet connected integrally.

[0045] The feeding component gradually feeds the sheet into the shearing and forming die according to the set step distance. First, the sheet moves to the corresponding position of the outer punching holes of the lower shearing die and the upper shearing die. At this time, the power module drives the upper shearing die to move downward, and the die head passes through the outer punching holes to punch the sheet, punching out the outer hole positions required for the product sheet. After completing the outer punching process, the feeding component steps the sheet forward again, making the sheet move to the corresponding position of the first inner punching hole. The power module drives the upper shearing die to punch again to form the first inner punching hole. Repeat the above step-by-step feeding and punching process to complete the punching of the second inner punching hole in sequence. Finally, the sheet moves to the corresponding position of the edge punching hole. The power module drives the upper shearing die to punch, and the edge punching hole punches off the excess part of the sheet edge. At the same time, the first step positioning hole in the center of the lower shearing die and the upper shearing die cooperates with the feeding component to accurately position the sheet, ensuring the accuracy of each punching position. After this series of step-by-step punching processes, a product sheet that is integrally connected and has preset hole positions and shapes is finally obtained.

[0046] This step-by-step punching method can accurately control the hole position layout and outer contour of the product sheet. By gradually punching different hole positions, it avoids the problems of hole position deviation or sheet deformation that may be caused by punching multiple complex hole positions at one time, improving the dimensional accuracy and forming quality of the product sheet. At the same time, the cooperation of step-by-step punching with the feeding component and the step positioning hole realizes automated and continuous production, reduces manual intervention, and improves production efficiency.

[0047] As a further preferred embodiment, an inner blank pressing die 9 is provided in the flanging die 4, the outer multi-stage bending die 5, and the head punching die 6. The inner blank pressing die 9 includes an inner blank lower die base 91 and an upper die pressing plate 92. A second step positioning hole 93 is provided in the center of the inner blank lower die base 91. Under the action of the power module 21, the upper die pressing plate 92 presses the first blank, the second blank, and the third blank on the inner blank lower die base 91.

[0048] When processing the clamp blank in the flanging die, the outer multi-stage bending die, and the head punching die, since these processes mainly involve operations such as outer flanging, outer bending, and head punching of the clamp, and the inner side of the clamp does not need to be processed at this stage. The inner blank pressing die is composed of an inner blank lower die base and an upper die pressing plate. A second step positioning hole is provided in the center of the inner blank lower die base. When the blank moves to the corresponding working position through the feeding component, the second step positioning hole cooperates with the positioning structure on the blank (such as the positioning hole formed by processing the shearing and forming die) to achieve preliminary positioning.

[0049] Subsequently, the power module drives the upper die pressing plate to move downward, tightly pressing the blank against the lower die base inside the blank. When the flanging die works, the upper flanging die applies a flanging force to the outside of the blank. At this time, the inner die of the blank provides a reverse supporting force to ensure the stability of the blank during the flanging process. When the outer multi-stage bending die performs the bending operation, the upper die of each stage of the bending die applies a bending pressure to the outside of the blank. The inner die of the blank prevents the blank from being distorted or displaced during the bending process by fixing the inside of the blank. When the head punching die punches, the blank middle pressing plate (a part of the upper die pressing plate of the inner die of the blank) presses the blank tightly, and the limit plate assists in positioning. The punch punches the head of the blank. The fixing effect of the inner die of the blank ensures the accuracy of the punching position. In this way, the inner die of the blank provides stable support and positioning for the blank without affecting the processing of the outside and the head.

[0050] The setting of the inner die of the blank significantly improves the processing accuracy and product quality of each process. During the flanging, bending, and punching processes, shape deviations, dimensional errors, or surface defects caused by the instability of the blank are effectively avoided. In the flanging process, the stable positioning of the blank ensures the consistency of the flanging angle and height. In the bending process, the blank is prevented from being distorted, making the bending shape more in line with the design requirements. In the punching process, the accuracy of the hole position is ensured.

[0051] As a further preferred embodiment, the flanging die 4 includes two groups of symmetrically arranged upper flanging dies 41 and the first lower die base 42. The upper end of the upper flanging die 41 is connected to the power module 21. The first lower die base 42 is provided with an external flanging groove 43 for the product sheet. The lower end of the upper flanging die 41 is provided with a first ejector head 44 placed in the external flanging groove 43 for the product sheet. When the power module drives the upper flanging die to move downward, the first ejector head presses the two sides of the product sheet outside into the flanging groove, causing the two sides of the product sheet to be flanged externally to form a first blank, which can accurately control the flanging shape and size of the product sheet and ensure the flanging quality.

[0052] As a further preferred embodiment, the outer multi-stage bending die 5 includes a first-stage outer bending die 51 and a second-stage outer bending die 52. The first-stage outer bending die 51 includes two groups of symmetrically arranged upper first-stage outer bending dies 511 and the second lower die base 512. The upper end of the upper first-stage outer bending die 511 is connected to the power module 21. The second lower die base 512 is provided with a first bending groove 513 for the outside of the blank. The lower end of the upper first-stage outer bending die 511 is provided with a second ejector head 514 that is correspondingly placed in the first bending groove 513 for the outside of the blank. The first bending groove 513 for the outside of the blank includes a bending groove 515 for the head of the blank. The power module drives the upper first-stage outer bending die to move downward, and the second ejector head presses the outside of the first blank into the first bending groove for the outside of the blank for the first bending;

[0053] The secondary outer bending die 52 comprises two groups of symmetrically arranged secondary outer bending die upper dies 521 and lower die seats 522. The upper end of the secondary outer bending die upper die 521 is connected to the power module 21, and the lower die seat 522 is provided with a blank outer bending groove 523. The lower end of the secondary outer bending die upper die 521 is provided with a pin 524 placed in the blank outer bending groove 523. The blank outer bending groove 523 is located on the inner side of the blank outer bending groove 1 51. The power module drives the secondary outer bending die upper die to move downward, and the pin 3 further presses the outer side of the blank that has undergone the primary bending into the blank outer bending groove 2 for a second bending, thereby realizing multiple bending forming of the outer side of the blank. At the same time, the head of the blank is subjected to a secondary bending adjustment, so that the head of the blank, which originally has a certain bending angle, is bent to a horizontal state.

[0054] The multi-stage bending design can gradually and accurately bend the outside of the blank, so that the bending shape of the outside of the blank is more in line with the design requirements of the clamp, improving the bending accuracy and product quality. At the same time, the multi-stage bending disperses the bending stress and reduces the possibility of defects such as deformation and cracking of the blank during the bending process. At the same time, the secondary outer bending die bends the two heads of the blank to a horizontal state. The horizontal head makes the punch evenly stressed when punching, which can ensure the accuracy of the hole position, avoid quality problems such as hole position deviation and hole diameter deformation, and ensure that the dimensional accuracy of the clamp head hole meets the design requirements.

[0055] As a further preferred embodiment, the head punching die 6 includes a head punching upper die 61 and a lower die seat four 62, the upper end of the head punching upper die 61 is connected to the power module 21, the lower die seat four 62 is provided with a blank outer bending groove three 63, the lower end of the head punching upper die 61 is connected to a pressure plate 64, the head punching upper die 61 is provided with a punch 65, the punch 65 is set through the pressure plate 64, the upper end of the lower die seat four 62 is provided with a limit plate 66, the limit plate 66 is located at the lower end of the pressure plate 64 and is provided with a groove for the blank two to enter, the lower end of the upper die pressure plate 92 in the inner side pressure die 9 of the blank is provided with a blank middle pressure plate 67, and the blank middle pressure plate 67 is located directly above the blank outer bending groove three 63.

[0056] During operation, the power module drives the upper punching die of the head to move downward, and the pressure plate in the middle of the blank first presses the second blank on the bending groove three on the outer side of the blank to fix it, and then the punch passes through the pressure plate to punch holes at both ends of the second blank. The limit plate limits the position of the second blank to ensure the accuracy of the punching position, thereby improving the accuracy of the head punching and the product quality, so that the punched blank three meets the design requirements of the clamp.

[0057] As a further preferred embodiment, the inner multi-stage bending die 7 includes a primary inner bending die 71 and a secondary inner bending die 72. The primary inner bending die 71 includes two sets of symmetrically arranged upper primary inner bending dies 711 and lower die base five 712. The upper end of the upper primary inner bending die 711 is connected to the power module 21. An inner blank bending groove one 713 is provided in the lower die base five 712. A W-shaped head 714 is provided at the lower end of the upper primary inner bending die 711 and is placed in the inner blank bending groove one 713. A step positioning hole three 715 is provided on the lower die base five 712. The power module drives the upper primary inner bending die to move downward, and the W-shaped head presses the inner side of the blank three into the inner blank bending groove one for the first bending;

[0058] The secondary inner bending die 72 includes two sets of symmetrically arranged upper secondary inner bending dies 721 and lower die base six 722. The upper end of the upper secondary inner bending die 721 is connected to the power module 21. The two sides of the lower die base six 722 protrude upward toward the center. An inner blank bending groove two 723 matching the protrusion of the lower die base six 722 is provided in the upper secondary inner bending die 721. Two sets of the inner blank bending groove two 723 are arranged at intervals. A step positioning hole four 724 is provided on the lower die base six 722. The power module drives the upper secondary inner bending die to move downward, and further presses the inner side of the blank four after the first bending into the inner blank bending groove two for the second bending, realizing the multi-stage bending forming of the inner side of the blank.

[0059] Through the cooperation of the primary and secondary inner bending dies, the inner side of the blank can be precisely bent step by step, so that the bending shape of the inner side of the blank meets the design requirements of the clamp, improving the accuracy of the inner bending and the product quality. At the same time, the multi-stage bending method can better control the stress distribution during the bending process, reducing the risk of blank deformation and damage.

[0060] As a further preferred embodiment, the shearing die 8 includes a shearing upper die 81 and a shearing lower die base 82. The upper end of the shearing upper die 81 is connected to the power module 21. A shearing groove 83 is provided in the shearing lower die base 82. The cutting head 84 of the shearing upper die 81 is located in the shearing groove 83. When the power module drives the shearing upper die to move downward, the cutting head cuts off the integrally connected blank four, and can accurately cut the blank four into individual clamps, ensuring the dimensional accuracy and the quality of the cut surface of the clamp, so that the formed clamp meets the product specification requirements.

[0061] As a further preferred embodiment, the two end portions of the blank three are unfolded outward by the W-shaped head 714 cooperating with the inner blank bending groove one 713, and the unfolding angle is 15 degrees to 20 degrees.

[0062] In the process of the first-stage inner bending die, the power module drives the upper die of the first-stage inner bending die to move downward, and the W-shaped head at its lower end acts in cooperation with the inner bending groove I of the blank in the lower die base V. The special structural design of the W-shaped head enables it to exert an outward force on both ends of the blank III during the downward pressing process. At the same time, the inner bending groove I of the blank provides forming support for the blank. The two cooperate to expand both ends of the blank III outward, forming an expansion angle of 15-20 degrees, making the head of the clamp present an outward V shape. This design changes the traditional inward V structure of the clamp head. When drilling holes in the head and connecting bolts in the subsequent process, the outward V shape enables the bolt to withstand greater torque during the tightening process. Because the outward V structure makes the force direction of the bolt consistent with the expansion trend of the clamp opening, the tensile force generated when the bolt is tightened can be more effectively converted into the clamping force of the clamp on the brake air chamber, thereby improving the sealing performance between the clamp and the brake air chamber.

[0063] The feeding component is responsible for conveying the product blank into the die according to the set rhythm. In each process module of the progressive die (such as the shearing and forming die, the flanging die, the outer multi-stage bending die, etc.), different step positioning holes (step positioning hole I, step positioning hole II, step positioning hole III, etc.) are correspondingly set. When the feeding component conveys the blank into the die, first, the step positioning hole I in the shearing and forming die positions the initial sheet to determine the position of the first stamping. After completing the shearing and forming process, the feeding component acts again to convey the blank forward. At this time, the step positioning hole II in the next process module (such as the flanging die) cooperates with the formed positioning structure (such as a hole) on the blank to reposition the blank.

[0064] Each step positioning hole works in cooperation with the feeding component. The feeding component precisely controls the distance of each movement of the blank according to the position information of the step positioning hole. No matter which process the blank has gone through, such as shearing, flanging, bending, punching, etc., the step positioning hole can ensure that when the blank moves to the next die station, its position always remains the same, enabling each process to accurately act on the preset area of the blank, ensuring the processing accuracy and improving the positioning accuracy and processing consistency in the production process of the clamp.

[0065] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. A composite die for one-time forming of a clamp, characterized in that, Including: A base, a progressive die disposed on the base, a power module for driving the progressive die to punch downward and a jacking module for driving the product to be ejected are further disposed on the base, a feeding component for the step-by-step movement of the product blank is provided on one side of the base, and the progressive die includes a shearing and forming die, a flanging die, an outer multi-stage bending die, a head punching die, an inner multi-stage bending die and a shearing die arranged in sequence; The shearing and forming die pre-processes and punches the sheet material into a product sheet connected integrally; The flanging die flanges the outer sides of both sides of the product sheet into blank one; The outer multi-stage bending die includes multiple groups of outer bending dies, and the outer sides of blank one are bent multiple times by the multiple groups of outer bending dies to form blank two; The head punching die punches the two end parts of blank two to form blank three; The inner multi-stage bending die includes multiple groups of inner bending dies, and the inner sides of blank three are bent multiple times by the multiple groups of inner bending dies to form blank four; The shearing die cuts and forms the integrally connected blank four into individual clamps.

2. The composite die for one-time forming of a clamp according to claim 1, wherein The shearing and forming die includes a shearing lower die and a shearing upper die. Two groups of symmetric outer punching holes, inner punching hole one, inner punching hole two and edge punching break holes are sequentially arranged at intervals along the feeding direction on the shearing lower die and the shearing upper die. The outer punching holes are located outside the sum of inner punching hole one and inner punching hole two. Step-by-step positioning holes one are arranged at intervals in the center of the shearing lower die and the shearing upper die. The die head of the power module passes through the two groups of outer punching holes, inner punching hole one, inner punching hole two, edge punching break holes and step-by-step positioning holes one on the shearing upper die to pre-process and punch the sheet material into a product sheet connected integrally.

3. The composite die for one-time forming of a clamp according to claim 1, characterized in that The flanging die, the outer multi-stage bending die and the head punching die are provided with a blank inner pressing die in the middle. The blank inner pressing die includes a blank inner lower die seat and an upper die pressing plate. A step-by-step positioning hole two is arranged in the center of the blank inner lower die seat. Under the action of the power module, the upper die pressing plate presses blank one, blank two and blank three on the blank inner lower die seat.

4. The composite die for one-time forming of a clamp according to claim 1, characterized in that, The flanging die includes two groups of symmetrically arranged flanging upper dies and a lower die seat one. The upper ends of the flanging upper dies are connected to the power module. An outer flanging groove for the product sheet is arranged in the lower die seat one. A top head one placed in the outer flanging groove for the product sheet is arranged at the lower end of the flanging upper die.

5. The composite die for one-time forming of a clamp according to claim 1, characterized in that, The outer multi-stage bending die includes a first-stage outer bending die and a second-stage outer bending die. The first-stage outer bending die includes two groups of symmetrically arranged first-stage outer bending die upper dies and a lower die seat two. The upper ends of the first-stage outer bending die upper dies are connected to the power module. An outer bending groove one for the blank is arranged in the lower die seat two. A top head two matching and placed in the outer bending groove one for the blank is arranged at the lower end of the first-stage outer bending die upper die. The outer bending groove one for the blank includes a blank head bending groove; The second-stage outer bending die includes two groups of symmetrically arranged second-stage outer bending die upper dies and a lower die seat three. The upper ends of the second-stage outer bending die upper dies are connected to the power module. An outer bending groove two for the blank is arranged in the lower die seat three. A top head three placed in the outer bending groove two for the blank is arranged at the lower end of the second-stage outer bending die upper die. The outer bending groove two for the blank is located inside the outer bending groove one for the blank.

6. A composite die for one-time forming of a clamp, characterized in that, The head punching die includes an upper head punching die and a lower die base 4. The upper end of the upper head punching die is connected to a power module. A blank outer bending groove 3 is provided in the lower die base 4. A pressure plate is connected to the lower end of the upper head punching die. A punch is provided in the upper head punching die, and the punch passes through the pressure plate. A limit plate is provided at the upper end of the lower die base 4. The limit plate is located below the pressure plate and has a groove inside for the blank 2 to enter. A blank middle pressure plate is provided at the lower end of the upper die pressure plate in the blank inner pressing die. The blank middle pressure plate is located directly above the blank outer bending groove 3.

7. The composite mold for one-time forming of a clamp according to claim 1, characterized in that ,The inner multi-stage bending die includes a first-stage inner bending die and a second-stage inner bending die. The first-stage inner bending die includes two groups of symmetrically arranged first-stage inner bending die upper dies and a lower die base 5. The upper end of the first-stage inner bending die upper die is connected to a power module. A blank inner bending groove 1 is provided in the lower die base 5. A W-shaped top head placed in the blank inner bending groove 1 is provided at the lower end of the first-stage inner bending die upper die. A step positioning hole 3 is provided on the lower die base 5,; The second-stage inner bending die includes two groups of symmetrically arranged second-stage inner bending die upper dies and a lower die base 6. The upper end of the second-stage inner bending die upper die is connected to a power module. The two sides of the lower die base 6 protrude upward toward the center. A blank inner bending groove 2 matching the protrusion of the lower die base 6 is provided in the second-stage inner bending die upper die. Two groups of the blank inner bending grooves 2 are arranged at intervals. A step positioning hole 4 is provided on the lower die base 6.

8. A composite mold for one-time forming of a clamp, characterized in that, The shearing die includes a shearing upper die and a shearing lower die base. The upper end of the shearing upper die is connected to a power module. A shearing groove is provided in the shearing lower die base. The cutting head of the shearing upper die is located in the shearing groove.

9. The composite die for one-time forming of a clamp according to claim 7, characterized in that, The two end parts of the blank 3 are unfolded outward by the cooperation of the W-shaped top head and the blank inner bending groove 1, and the unfolding angle is 15 degrees to 20 degrees.

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