Long life progressive die bending slide block assembly

Abstract

The utility model relates to the technical field of hardware continuous punch press mould, specifically relates to a long -life's continuous mould bending slide block subassembly, it includes the slide block of sliding setting on the lower die plate, the core rod that is used for cooperating with the bending public material piece to carry out the bending in the detachable way inlaying at the upper end corner of the slide block forward direction, two the detachable way inlaying on the slide block and being used for supporting the core rod and the pad column that prevents the core rod from bending and breaking downwardly, the utility model discloses the collaborative support structure of detachable core rod and double -sided pad column, has improved bending slide block subassembly's anti -fracture performance and service life significantly.

Description

Technical Field

[0001] This utility model relates to the field of continuous stamping die technology, and more specifically, it relates to a long-life continuous die bending slider assembly. Background Technology

[0002] For example Figure 1-2 The metal bending parts shown have a material thickness of 0.1-0.15mm and can be produced using two methods. Method one involves first producing the sheet material to be bent using wire cutting or punching (the shape of this sheet corresponds to the unfolded outline of a single workpiece), and then placing this sheet material into a bending die for a one-time bending process. This method is suitable for orders of tens or hundreds, but cannot meet the needs of orders of thousands or tens of thousands. Method two involves using a progressive die, which sets multiple bending processes on the die to punch and bend the long strip of material into individual workpieces. Figure 3 The diagram shows the cross-sectional changes of a sheet material undergoing six bends. In the sixth bending process, the semi-finished workpiece bends inward after bending, which cannot be formed by ordinary forming structures. Therefore, a bending slider structure is required. The working principle of the bending slider structure is as follows: During the downward movement of the die, the stripper plate first presses down on the material, and then the cutting tool contacts the bending slider, causing the bending slider to move forward. When the bending slider reaches the designated position, the bending tool continues to form downwards, allowing the material to reach the ideal forming state. Only after the bending slider slides backwards can the material continue to move forward.

[0003] However, due to the workpiece bending height being too low ( Figure 2 The height shown at point H is 1.0-1.2mm, and the bending slider (its structure is as follows) Figure 4 As shown, the integrated structure of the bending slider causes the supporting bending part to break frequently, resulting in a very long time for subsequent die repair wire cutting of the bending slider, which is not conducive to production and delivery. Utility Model Content

[0004] The purpose of this invention is to provide a long-life continuous die bending slider assembly to solve the technical problem of easy breakage of the support bending part of existing bending sliders.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A long-life continuous die bending slider assembly includes a slider slidably disposed on a lower die plate, a mandrel detachably embedded at the upper corner of the slider in the direction of travel and used to cooperate with a bending die to bend the sheet material, and two pads detachably embedded on the slider and used to support the mandrel and prevent the mandrel from bending downward and breaking.

[0006] Optionally, the upper corner of the slider in the backward direction is set as a driving angle, which is used to cooperate with the inserter to push the slider to slide in the forward direction.

[0007] Optionally, the slider is provided with a reset groove for housing the compression spring; one end of the compression spring is located in the reset groove and abuts against the slider, and the other end abuts against the lower template; when the inserter moves upward, the compression spring pushes the slider to slide in the backward direction, thereby causing the mandrel to detach from the material sheet.

[0008] Optionally, the mandrel includes a connecting part and a supporting bending part, the thickness of which is 0.8-1.0 mm.

[0009] Optionally, two support pillars are used to support the support bend of the mandrel, and are located on both sides of the support bend.

[0010] Optionally, the angle between the direction in which the slider slides forward and the direction in which the sheet moves forward is 60°-70°; the projection of the inserter on the lower template is located on one side of the sheet.

[0011] In summary, this utility model has the following beneficial effects: By adopting a detachable mandrel and a double-sided support structure, this utility model significantly improves the fracture resistance and service life of the bending slider assembly. Specifically, the mandrel adopts a split, detachable design, allowing for quick replacement of the easily damaged support bending section with a thickness of only 0.8-1.0mm, greatly shortening maintenance wire cutting time and production downtime. The two support pillars are symmetrically embedded in the slider body and support the mandrel's support bending section on both sides, effectively dispersing the concentrated stress during bending pressure and fundamentally solving the problem of frequent mandrel breakage caused by excessively low workpiece bending height (1.0-1.2mm). Combined with the precise coordination of the drive angle and the spring reset mechanism, it reduces mechanical wear while ensuring bending forming position accuracy. Ultimately, it achieves a comprehensive advantage of improved production efficiency (meeting the needs of large-volume orders), reduced maintenance costs (reducing the frequency of spare parts replacement), and improved yield (avoiding mixed materials and defective products due to breakage). Attached Figure Description

[0012] Figure 1 This is a structural diagram of a metal bending component.

[0013] Figure 2 This is a side view of a metal bending component.

[0014] Figure 3 A diagram showing the cross-sectional changes of a sheet material after six bends.

[0015] Figure 4 This is a schematic diagram of an existing bending slider.

[0016] Figure 5 This is a schematic diagram of the continuous mold bending slider assembly in this utility model.

[0017] Figure 6 This is an exploded view of the continuous die bending slider assembly in this utility model.

[0018] Figure 7 This is an assembly structure diagram of the continuous die bending slider assembly, the insert cutter, and the bending die in this utility model.

[0019] Figure 8 yes Figure 7 The main view.

[0020] Figure 9 This is a front view of a continuous die equipped with the continuous die bending slider assembly of this utility model.

[0021] Figure 10 This is a top view of the continuous die bending slider assembly assembled on the lower template in this utility model.

[0022] In the diagram: 1. Slider; 11. Drive angle; 12. Reset groove; 2. Core rod; 21. Connecting part; 22. Support bending part; 3. Pad column; 4. Lower template; 5. Bending tool; 6. Insert knife; 7. Material sheet; 8. Pressure plate. Detailed Implementation

[0023] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] This utility model provides a long-life continuous die bending slider assembly, such as... Figure 5-6 As shown, it includes a slider 1 that is slidably set on the lower template 4, a mandrel 2 that is detachably embedded at the upper corner of the slider 1 in the forward direction and is used to cooperate with the bending mandrel 5 to bend the sheet 7, and two pads 3 that are detachably embedded on the slider 1 and are used to support the mandrel 2 and prevent the mandrel 2 from bending downward and breaking.

[0026] Furthermore, the upper corner of the slider 1 in the backward direction is set as a driving angle 11, which is used to cooperate with the inserter 6 to push the slider 1 to slide in the forward direction.

[0027] Specifically, the present invention provides a long-life continuous die bending slider assembly, which is mainly used in the field of continuous stamping dies for hardware. It is particularly suitable for the mass production of precision parts that are subjected to complex multi-stage bending of thin materials (thickness 0.1-0.15mm) and one of the bending heights is extremely low (1.0-1.2mm). It aims to solve the technical problem that the thin supporting bending part of the traditional one-piece bending slider is prone to breakage under such working conditions.

[0028] The core innovation of the continuous die bending slider assembly provided by this utility model lies in its split and replaceable stress dispersion structure, which mainly includes three core components: slider 1, mandrel 2 and two pads 3.

[0029] Slider 1 is the foundation and motion carrier of the entire assembly. It is typically made of high-hardness, high-wear-resistant mold steel and machined by slow wire cutting. It is slidably mounted on the lower template 4 using a conventional inlay sliding structure. The backward movement direction of slider 1 (i.e. Figure 10 At the upper corner (opposite to the Y-axis), a driving angle 11 is machined. The angle of this driving angle 11 is set according to the required sliding stroke, usually between 45° and 60°. The driving angle 11 is used to cooperate with the corresponding inclined surface at the lower end of the insert 6 fixed to the upper die. When the upper die drives the insert 6 downward, the interaction of the inclined surfaces converts the vertical downward motion into pushing the slider 1 forward (i.e., Figure 10 The horizontal component of the sliding force (in the positive direction of the Y-axis).

[0030] At the upper corner of the slider 1 in the forward direction, a precision groove is machined for inserting the mandrel 2. The mandrel 2 is a key consumable component that directly participates in bending and forming in this assembly, and it adopts a split, detachable design. The mandrel 2 consists of a connecting part 21 and a supporting bending part 22, which is usually made of a high-toughness cemented carbide. The thickness of the supporting bending part 22 is designed to be extremely thin, 0.8-1.0 mm, to accommodate the extremely low bending height requirements of the workpiece. The mandrel 2 is fixed in the precision groove of the slider 1 by interference fit or screw fastening. The biggest advantage of this split design is that when the supporting bending part 22 breaks due to fatigue or overload, it is not necessary to replace or repair the entire bulky slider 1. Simply remove the damaged mandrel 2 from the slider 1 and replace it with a new pre-machined mandrel 2, which greatly reduces maintenance time and downtime costs.

[0031] To fundamentally solve the problem of easy breakage of the ultra-thin support bending section 22, this invention introduces two support pillars 3. The support pillars 3 are also made of high-strength mold steel and are vertically embedded in the slider 1 in a detachable manner (such as press-fit), located below the mandrel 2. The tops of the two support pillars 3 support the lower surface of the support bending section 22 of the mandrel 2, and are located on both sides of it, thus providing strong support from both sides of the lower part of the fragile support bending section 22 when the bending mandrel 5 is pressed down, effectively dispersing and offsetting the huge concentrated stress generated by bending, preventing the support bending section 22 from bending downwards and deforming until it breaks.

[0032] Furthermore, the slider 1 is provided with a reset groove 12 for housing the compression spring; one end of the compression spring is located in the reset groove 12 and abuts against the slider 1, and the other end abuts against the lower template 4; when the inserter 6 moves upward, the compression spring pushes the slider 1 to slide in the backward direction, thereby causing the mandrel 2 to detach from the material sheet 7.

[0033] The reset function of slider 1 is achieved through a simple spring mechanism. A reset groove 12 is provided in the middle of slider 1, and a compression spring (not shown in the figure) is placed in the reset groove 12. One end of the compression spring abuts against the bottom of the reset groove 12, and the other end abuts against the corresponding plane on the lower mold plate 4. When the upper mold rises and the insert 6 moves upward and disengages from the drive angle 11 of slider 1, the compressed spring releases its elastic force, pushing slider 1 to slide backward, so that the mandrel 2 quickly disengages from the formed sheet 7, making room for the sheet 7 to be conveyed forward to the next station.

[0034] The working process of the progressive die bending slider assembly provided by this utility model in the progressive die is as follows: Figures 7 to 10 As shown: Sheet 7 is pressed down by pressure plate 8. The upper die descends, and the insert 6 first contacts the drive angle 11 of slider 1, pushing slider 1 and mandrel 2 forward to the predetermined forming position. Subsequently, bending die 5, fixed to the upper die, continues to descend, working together with the positioned mandrel 2 to complete the precise bending of sheet 7. When the upper die rises, under the action of the compression spring, slider 1 drives mandrel 2 back, bending die 5 moves upward, pressure plate 8 releases, and sheet 7 is sent to the next station, completing one work cycle.

[0035] Furthermore, the angle between the direction in which the slider 1 slides forward and the direction in which the sheet 7 moves forward is 60°-70°; the projection of the inserter 6 on the lower template 4 is located on one side of the sheet 7.

[0036] like Figure 10 As shown, the sliding direction of slider 1 is set at an angle of 60°-70° with the feeding direction of sheet 7 (i.e., Figure 10The angle between the positive X-axis and Y-axis allows the workpiece to be laid out at an angle, which greatly optimizes the layout of the material on the strip, reduces the waste area, and significantly improves the utilization rate of the strip 7. At the same time, the insert 6 that drives the slider 1 to slide is arranged on one side of the strip 7, which effectively avoids its movement interference with the strip 7 or other mold components, provides sufficient space for the reset mechanism, and ensures the rigidity and movement stability of the drive structure.

[0037] The working principle and advantages of this utility model are as follows: By designing a split design for the traditional one-piece bending slider, the most vulnerable ultra-thin bending part is independently separated into a quick-replaceable mandrel 2, and double-sided pads 3 are used for coordinated support, transforming the fatal concentrated bending stress into compressive stress, fundamentally reducing the risk of breakage; Actual test data shows that the original one-piece bending slider needed to be replaced after bending 1000-2000 pieces (specifically referring to the 6th bend), while the improved bending slider assembly only needs to replace the mandrel 3 after bending 30000-50000 pieces. This not only shortens the maintenance time from several hours of traditional wire cutting processing to a simple replacement of a few minutes, greatly improving production efficiency and meeting the needs of large-volume orders, but also significantly reduces the overall production cost by reducing downtime and defective products.

[0038] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A long-life continuous die bending slider assembly, characterized in that: It includes a slider that is slidably set on the lower template, a mandrel that is detachably embedded at the upper corner of the slider in the direction of movement and is used to bend the sheet material in conjunction with the bending mandrel, and two pads that are detachably embedded on the slider and are used to support the mandrel and prevent the mandrel from bending downwards and breaking.

2. The continuous die bending slider assembly according to claim 1, characterized in that: The upper corner of the slider in the backward direction is set as the driving angle, which is used to cooperate with the inserter to push the slider to slide in the forward direction.

3. The continuous die bending slider assembly according to claim 1, characterized in that: The slider has a reset groove for housing the compression spring; one end of the compression spring is located in the reset groove and abuts against the slider, while the other end abuts against the lower template; when the inserter moves upward, the compression spring pushes the slider to slide backward, thereby causing the mandrel to detach from the material.

4. The continuous die bending slider assembly according to claim 1, characterized in that: The mandrel includes a connecting part and a supporting bending part, the thickness of which is 0.8-1.0mm.

5. The continuous die bending slider assembly according to claim 4, characterized in that: Two support pillars are used to support the bending section of the mandrel, and are located on both sides of the bending section.

6. The continuous die bending slider assembly according to claim 2, characterized in that: The angle between the direction in which the slider slides forward and the direction in which the sheet moves forward is 60°-70°; the projection of the inserter on the lower template is located on one side of the sheet.

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