A pneumatic double-station lower die positioning device for a bending machine

Abstract

The utility model discloses a pneumatic double position lower die positioning device of bending machine relates to bending machine technical field, including setting on the base lower mould, the lower mould upper is provided with the work position groove, detachable knife bar is equipped with on the work position groove upper, the knife bar is adapted with the lower mould upper, the knife bar is equipped with multistage, the knife bar below is equipped with the limit slide, the lower mould inside upper is equipped with the limit slide groove of sliding adaptation with limit slide, the lower mould inside the sliding of work position groove just below is equipped with the push bar, the lower mould inside lower is equipped with drive mechanism, the push bar is driven sliding through drive mechanism. The utility model discloses the replaceable knife bar of setting, greatly improved the service life of lower mould, in addition through to drive mechanism drive, drive the push bar and go out the hole and push the workpiece to move a distance upwards, workpiece can separate with the knife bar smoothly at this moment, realize the effect of automatic stripping, save the labor of staff manual unloading.

Description

Technical Field

[0001] This utility model relates to the field of bending machine technology, and in particular to a pneumatic dual-station lower die positioning device for bending machines. Background Technology

[0002] Bending—Under the pressure of the upper or lower die of the bending machine, the metal sheet first undergoes elastic deformation, and then enters plastic deformation. At the beginning of the plastic bending stage, the sheet is freely bent. As the upper or lower die applies pressure to the sheet, the sheet gradually comes into close contact with the inner surface of the V-groove of the lower die. At the same time, the radius of curvature and the bending lever arm gradually decrease. The pressure continues until the stroke ends, so that the upper and lower dies and the sheet are in full contact at three points. At this time, a V-shaped bend is completed, which is commonly known as bending.

[0003] For example, "CN222830415U" describes a pneumatic dual-station lower die positioning device for a bending machine, which relates to the field of bending machine technology. It has the advantage of setting two stations on the lower die, thereby adapting to bending of two thicknesses of plates or two angles. The key points of its technical solution are: it includes a die holder placed on the worktable of the bending machine and a lower die installed on the top of the die holder by a mounting component. The lower die has two stations, namely V-groove one and V-groove two. The worktable of the bending machine is provided with a pusher for pushing the die holder to move horizontally.

[0004] However, in the existing technology, during the bending process of a dual-station lower die bending machine, the upper die will squeeze the workpiece into the V-groove of the lower die. During the squeezing process, the surface of the workpiece will have great friction with the V-groove. After long-term use, the sharp corner of the lower die V-groove will wear and collapse, resulting in a decrease in the accuracy of the bent part, the generation of indentations, and the scrapping of the entire lower die due to local wear. Utility Model Content

[0005] In view of the aforementioned existing problems, this utility model is proposed.

[0006] The purpose of this invention is to solve the problems in the prior art where long-term use of the lower mold causes wear and collapse, resulting in decreased bending accuracy, workpiece surface indentations, and premature scrapping of the entire mold.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] On one hand, this utility model provides a pneumatic dual-station lower die positioning device for a bending machine, which includes a lower die set on a base, a station groove opened above the lower die, a detachable blade above the station groove, the blade being adapted to the upper part of the lower die, the blade having multiple segments, a limiting slide bar below the blade, a limiting groove inside the upper part of the lower die being adapted to slide with the limiting slide bar, a pusher slidably arranged inside the lower die located directly below the station groove, a driving mechanism being provided inside the lower part of the lower die, the pusher being driven to slide by the driving mechanism, a slot hole opened on the blade hole adapted to the pusher, the upper end of the pusher passing through the slot hole and extending upward.

[0009] Furthermore, multiple limiting slides are provided and distributed below the blade. Each limiting slide groove has multiple segments. A gear is rotatably provided below the blade between adjacent limiting slides. The gear meshes with one side of the limiting slide. By setting the gear, when the limiting slide slide slides in the limiting groove, its friction can be reduced, making it easier for the operator to move the blade on the lower mold.

[0010] Furthermore, the limiting slide bar has an inverted T-shaped structure. The side of the lower mold has an outer hole, and the two ends of the limiting slide bar have inner holes. A bolt is threaded through the outer hole, and one end of the bolt is threaded through the outer hole and inserted into the inner hole. Through the sliding arrangement of the limiting slide bar and the limiting groove, the vertical position of the cutting tool is limited. When it moves to the designated position, the bolt passes through the outer hole into the inner hole, thereby limiting the horizontal position of the cutting tool and the lower mold and preventing the cutting tool from shifting during the bending of the workpiece.

[0011] Furthermore, side grooves are provided on the upper sides of both sides of the blade, and side strips adapted to the side grooves are provided on the upper sides of both sides of the lower mold. The side strips and side grooves are used to limit the upper side of the blade, so as to prevent the side of the blade from lifting up during use and affecting the bending quality of the workpiece.

[0012] Furthermore, the lower mold is provided with a fixed tube, and multiple fixed tubes are spaced apart. The pusher is slidably disposed in the fixed tube. The upper end of the fixed tube is connected to the work station groove. The fixed tube is used to limit the movement direction of the pusher and ensure its movement stability.

[0013] Furthermore, the driving mechanism includes a sliding plate, a connecting bar, and a cylinder. The lower mold has an assembly groove inside, and the sliding plate is horizontally slidably disposed in the assembly groove. The lower end of the push bar is hinged to the upper part of the sliding plate through the connecting bar. The cylinder is disposed on the end face of the assembly groove, and the other end of the cylinder is assembled and connected to the end face of the sliding plate. Driven by the cylinder, the sliding plate is driven to slide horizontally in the assembly groove. When the connecting bar tends to be vertical, the upper end of the connecting bar pushes the push bar upward to push the workpiece for unloading. Conversely, when it tends to be horizontal, the push bar is pulled downward and retracts into the fixed tube to avoid affecting the workpiece loading and bending operations.

[0014] Furthermore, a connecting groove is provided above the assembly groove and between it and the fixed pipe. The movement trajectory of the connecting strip is adapted to the connecting groove, and the width of the connecting groove is adapted to the connecting strip. The connecting groove is used to limit the connecting strip and ensure its stability when hinged.

[0015] Furthermore, multiple balls are evenly distributed above and below the assembly groove, and the slide plate is slidably disposed between the upper and lower layers of balls. The balls reduce the friction when the slide plate slides, making its movement smoother.

[0016] The beneficial effects of this utility model are:

[0017] This invention significantly improves the service life of the lower mold by incorporating a replaceable blade. Specifically, when replacing the blade, the section to be replaced is slid off the lower mold, and the new blade is slid to the designated position on the lower mold and fixed in place. Additionally, the gear design reduces friction during the sliding installation of the blade with the lower mold, resulting in smoother movement. Furthermore, the drive mechanism propels the pusher through the slot, pushing the workpiece upwards a certain distance. At this point, the workpiece can easily separate from the blade, achieving automatic demolding and saving labor costs associated with manual unloading. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A perspective view of a pneumatic dual-station lower die positioning device for a bending machine provided by this utility model;

[0020] Figure 2 A schematic diagram illustrating the separation of the lower die and the cutting tool strip in a pneumatic dual-station lower die positioning device for a bending machine, provided by this utility model;

[0021] Figure 3 A schematic diagram of the blade strip of a pneumatic dual-station lower die positioning device for a bending machine provided by this utility model;

[0022] Figure 4 A schematic diagram of the internal structure of the lower die of a pneumatic dual-station lower die positioning device for a bending machine provided by this utility model;

[0023] Figure 5 This utility model provides a schematic diagram of the internal structure of the lower die of a pneumatic dual-station lower die positioning device for a bending machine.

[0024] Legend:

[0025] 1. Base; 2. Lower mold; 3. Station slot; 4. Tool bar; 511. Limiting slide bar; 512. Limiting slide groove; 6. Push bar; 7. Slot; 8. Gear; 911. Outer hole; 912. Inner hole; 913. Bolt; 10. Side groove; 11. Side strip; 12. Fixing tube; 131. Slide plate; 132. Connecting strip; 133. Cylinder; 134. Assembly slot; 135. Connecting slot; 136. Ball bearing. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, as used herein, "an embodiment" or "embodiment" refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in an embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0029] In one embodiment, please refer to Figures 1-5This utility model provides a technical solution: a pneumatic dual-station lower die positioning device for a bending machine, including a lower die 2 mounted on a base 1, a station groove 3 above the lower die 2, a detachable blade 4 above the station groove 3, the blade 4 being adapted to the upper part of the lower die 2, the blade 4 having multiple segments, and a limiting slide 511 below the blade 4, with multiple limiting slides 511 distributed below the blade 4, each limiting slide groove 512 containing multiple segments of the limiting slide 511, the limiting slide 511 having an inverted T-shaped structure, and a gear 8 rotatably mounted below the blade 4 between adjacent limiting slides 511. The gear 8 meshes with the limiting slide bar 511 on one side. By setting the gear 8, when the limiting slide bar 511 slides in the limiting slide groove 512, its friction can be reduced, making it easier for the operator to move the blade 4 on the lower mold 2. The upper part of the lower mold 2 is provided with a limiting slide groove 512 that is adapted to the sliding of the limiting slide bar 511. The push bar 6 is slidably provided in the lower mold 2 located directly below the work station groove 3. The lower part of the lower mold 2 is provided with a driving mechanism. The push bar 6 is driven to slide by the driving mechanism. The blade 4 is provided with a slot 7 that is adapted to the push bar 6. The upper end of the push bar 6 passes through the slot 7 and extends upward.

[0030] The lower mold 2 has an outer hole 911 on its side, and the limiting slide 511 has inner holes 912 on both sides. A bolt 913 is threaded through the outer hole 911. One end of the bolt 913 is threaded through the outer hole 911 and inserted into the inner hole 912. The limiting slide 511 and the limiting slide groove 512 are used to limit the vertical position of the blade 4. When it moves to the designated position, the bolt 913 is passed from the outer hole 911 into the inner hole 912 to limit the left and right position of the blade 4 and the lower mold 2, so as to prevent the blade 4 from shifting during the bending of the workpiece.

[0031] The blade 4 has side grooves 10 on both sides above, and the lower mold 2 has side strips 11 on both sides above that are adapted to the side grooves 10. The side strips 11 and the side grooves 10 are used to limit the upper side of the blade 4, so as to prevent the side of the blade 4 from lifting up during use and affecting the bending quality of the workpiece.

[0032] The lower mold 2 is provided with a fixed tube 12, and multiple fixed tubes 12 are spaced apart. The pusher 6 is slidably disposed in the fixed tube 12. The upper end of the fixed tube 12 is connected to the station slot 3. The fixed tube 12 is used to limit the movement direction of the pusher 6 to ensure its movement stability.

[0033] In another embodiment, see Figure 2 , Figure 4 and Figure 5 ,

[0034] The driving mechanism includes a slide plate 131, a connecting bar 132, and a cylinder 133. The lower mold 2 has an assembly groove 134 inside. The slide plate 131 is horizontally slidably disposed in the assembly groove 134. The lower end of the push bar 6 is hinged to the upper part of the slide plate 131 through the connecting bar 132. The cylinder 133 is disposed on the end face of the assembly groove 134. The other end of the cylinder 133 is assembled and connected to the end face of the slide plate 131. Driven by the cylinder 133, the slide plate 131 is driven to slide horizontally in the assembly groove 134. When the connecting bar 132 tends to be vertical, the upper end of the connecting bar 132 pushes the push bar 6 to move upward, which is used to push the workpiece to unload. Conversely, when it tends to be horizontal, the push bar 6 is pulled downward and retracted into the fixed tube 12 to avoid affecting the workpiece loading and bending operations.

[0035] A connecting groove 135 is provided above the assembly groove 134 and connects to the fixed tube 12. The movement trajectory of the connecting bar 132 is adapted to the connecting groove 135, and the width of the connecting groove 135 is adapted to the connecting bar 132. Multiple balls 136 are evenly distributed above and below the assembly groove 134. The slide plate 131 is slidably disposed between the upper and lower layers of balls 136. The connecting groove 135 is used to limit the connecting bar 132 to ensure its stability when hinged. The balls 136 are used to reduce the friction of the slide plate 131 when sliding, making its movement smoother.

[0036] Working principle: When bending a workpiece, the upper die of the bending machine squeezes the workpiece to the groove position above the blade 4, thus bending the workpiece. After a period of use, the worn and deformed blade 4 can be replaced, greatly improving the service life of the lower die 2. Specifically, when replacing the blade 4, the section of blade 4 to be replaced is slid off the lower die 2, and then the new blade 4 is slid back to the designated position on the lower die 2 and fixed in place. In addition, the gear 8 reduces the friction of the blade 4 when sliding with the lower die 2, making its movement smoother. After bending the workpiece, the workpiece may be tightly stuck in the groove of the blade 4 due to springback or vacuum adsorption effect. At this time, by driving the drive mechanism, the pusher 6 passes through the slot 7 and pushes the workpiece upward a certain distance. At this time, the workpiece can be smoothly separated from the blade 4, achieving the effect of automatic demolding.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pneumatic dual-station lower die positioning device for a bending machine, comprising a lower die (2) mounted on a base (1), wherein a station slot (3) is provided above the lower die (2), characterized in that: A blade (4) is detachably provided above the work station slot (3). The blade (4) is adapted to the upper part of the lower mold (2). The blade (4) has multiple segments. A limiting slide (511) is provided below the blade (4). A limiting groove (512) is provided inside the upper part of the lower mold (2) to slide and adapt to the limiting slide (511). A pusher (6) is slidably provided inside the lower mold (2) located directly below the work station slot (3). A driving mechanism is provided inside the lower part of the lower mold (2). The pusher (6) is driven to slide by the driving mechanism. A slot (7) adapted to the pusher (6) is opened on the blade (4). The upper end of the pusher (6) passes through the slot (7) and extends upward.

2. The pneumatic dual-station lower die positioning device for a bending machine according to claim 1, characterized in that, The limiting slide bar (511) is provided in multiple ways and distributed below the blade (4). Each limiting slide bar (511) in the limiting groove (512) is provided in multiple segments. A gear (8) is rotatably provided below the blade (4) between adjacent limiting slide bars (511). The gear (8) is meshed with one side of the limiting slide bar (511).

3. The pneumatic dual-station lower die positioning device for a bending machine according to claim 2, characterized in that, The limiting slide bar (511) has an inverted T-shaped structure. The lower mold (2) has an outer hole (911) on its side. The limiting slide bar (511) has inner holes (912) on both sides. A bolt (913) is threaded through the outer hole (911). One end of the bolt (913) is threaded through the outer hole (911) and inserted into the inner hole (912).

4. The pneumatic dual-station lower die positioning device for a bending machine according to claim 3, characterized in that, The blade (4) has side grooves (10) on both sides above it, and the lower mold (2) has side strips (11) on both sides above it that are adapted to the side grooves (10).

5. A pneumatic dual-station lower die positioning device for a bending machine according to claim 4, characterized in that, The lower mold (2) is provided with a fixed tube (12), and multiple fixed tubes (12) are spaced apart. The pusher (6) is slidably disposed in the fixed tube (12), and the upper end of the fixed tube (12) is connected to the work station groove (3).

6. A pneumatic dual-station lower die positioning device for a bending machine according to claim 5, characterized in that, The driving mechanism includes a slide plate (131), a connecting bar (132), and a cylinder (133). The lower mold (2) is provided with an assembly groove (134). The slide plate (131) is horizontally slidably disposed in the assembly groove (134). The lower end of the push bar (6) is hinged to the upper part of the slide plate (131) through the connecting bar (132). The cylinder (133) is disposed on the end face of the assembly groove (134), and the other end of the cylinder (133) is assembled and connected to the end face of the slide plate (131).

7. A pneumatic dual-station lower die positioning device for a bending machine according to claim 6, characterized in that, A connecting groove (135) is provided above the assembly groove (134) and between it and the fixed pipe (12), and the movement trajectory of the connecting strip (132) is adapted to the connecting groove (135).

8. A pneumatic dual-station lower die positioning device for a bending machine according to claim 7, characterized in that, Multiple balls (136) are evenly distributed above and below the assembly groove (134), and the slide plate (131) is slidably disposed between the upper and lower layers of balls (136).

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