Multi-section die quick-change structure of bending machine

Abstract

This utility model relates to the field of metal processing equipment technology, specifically to a multi-stage quick-change mold structure for a bending machine. It includes a processing table, on the upper surface of which multiple sets of positioning protrusions are fixedly installed. A frustum-shaped end is fixedly installed on the top surface of each positioning protrusion, and a precision stud is fixedly installed at the top of each frustum-shaped end. A support frame is also fixedly installed on the upper surface of the processing table, and multiple hydraulic cylinders are fixedly installed on the top plate of the support frame. A punch is detachably mounted on the end of the telescopic shaft of each hydraulic cylinder via multiple fastening bolts. Multiple dies are also installed on the upper surface of the processing table, and side fixing plates are fixedly installed on both sides of each die. The side fixing plates are fitted onto the corresponding positioning protrusions, and nuts are threaded onto the precision studs and pressed against the side fixing plates. The punch and die are positioned by a second guide post and a second guide sleeve. This utility model facilitates positioning and installation operations and has the advantage of significantly shortening mold change time.

Description

Technical Field

[0001] This utility model relates to the field of metal processing equipment technology, and more specifically, to a multi-stage quick-change mold structure for bending machines. Background Technology

[0002] In the field of sheet metal processing, bending machines, as the core equipment for bending and forming sheet metal, are widely used in the production of automotive parts, home appliance housings, hardware accessories, and other scenarios. With the increasing market demand for product diversification and customization, multi-segment mold combination processing is required for complex workpieces (such as multi-angle bent car door sills). When using multi-segment mold combination processing, different specifications of bending molds, such as V-shaped molds, U-shaped molds, and arc molds, need to be frequently switched on the same production line.

[0003] The existing bending machine molds mostly adopt an integral fixed structure. The concave mold and the processing table, and the convex mold and the hydraulic cylinder are rigidly connected by multiple sets of scattered bolts. When changing the mold, dozens of bolts need to be removed one by one, and the mold position needs to be manually calibrated. The mold change time is usually as long as 30-60 minutes, which leads to frequent production line downtime. Especially in small batch and multi-batch production scenarios, the equipment utilization rate is greatly reduced and cannot meet the needs of high-efficiency production.

[0004] Furthermore, in traditional mold changing processes, the alignment of the punch and die relies on manual visual inspection or simple measuring tools for calibration. This lack of standardized positioning benchmarks and the susceptibility of manual calibration to operational experience can lead to coaxiality deviations between the punch and die, resulting in quality issues such as bending angle deviations and edge wrinkling, thus affecting the overall performance. Therefore, we propose a multi-stage quick-change mold structure for the bending machine. Utility Model Content

[0005] The purpose of this invention is to provide a multi-stage quick-change mold structure for bending machines to solve the defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: The bending machine features a multi-stage quick-change mold structure, including a processing table. Multiple sets of positioning protrusions are fixedly mounted on the upper surface of the processing table. A frustum-shaped end is fixedly mounted on the top surface of each positioning protrusion, and a precision stud is fixedly mounted on the top of each frustum-shaped end. A support frame is also fixedly mounted on the upper surface of the processing table. Multiple hydraulic cylinders are fixedly mounted on the top plate of the support frame. A punch is detachably mounted on the end of the telescopic shaft of each hydraulic cylinder via multiple fastening bolts. Multiple dies are also mounted on the upper surface of the processing table. Side fixing plates are fixedly mounted on both the left and right sides of each die. The side fixing plates are fitted onto the corresponding positioning protrusions. Nuts, pressed against the side fixing plates, are threaded onto the precision studs. The punches and dies are positioned by a second guide post and a second guide sleeve.

[0007] Preferably, the frustum end is frustum-shaped, the diameter of the bottom surface of the frustum end is equal to the outer diameter of the positioning protrusion, and the outer diameter of the frustum end decreases sequentially from bottom to top; This feature makes it easier for the side mounting plate to slide down onto the precision studs, achieving a quick and easy installation.

[0008] Preferably, a clamping sleeve is fixedly installed at the bottom end of the precision stud. The clamping sleeve is sleeved on the outside of the frustum end and the positioning protrusion, and the clamping sleeve presses the side fixing plate against the processing table. This setting enables the side fixing plate to be clamped and fixed normally.

[0009] Preferably, side plates are fixedly installed on both the left and right sides of the punch and the die, the second guide post is fixedly installed on the bottom surface of the upper side plate, the second guide sleeve is fixedly installed on the top surface of the lower side plate, and the second guide post is located inside the second guide sleeve and is slidably connected to the second guide sleeve. This setting enables positioning operations between the punch and die to ensure accuracy.

[0010] Preferably, the left and right side plates of the support frame are provided with feeding holes, and the height of the feeding holes is between 10cm and 15cm.

[0011] Preferably, a bolt plate is fixedly installed at the end of the telescopic shaft of the hydraulic cylinder, and the punch and the bolt plate are fixedly connected by a plurality of fastening bolts.

[0012] Preferably, two symmetrical first guide posts are fixedly installed on the upper surface of the bolt plate, and a first guide sleeve is fixedly installed at the corresponding position on the bottom surface of the top plate of the support frame. The first guide sleeve is sleeved on the first guide post and slidably connected to the first guide post. This setting guides the up-and-down movement of the bolt plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model replaces the traditional multi-group scattered bolt connection by setting a positioning protrusion, a frustum end and a precision stud on the processing table, and installing it with the side fixing plate of the die and tightening the nut. At the same time, the hydraulic cylinder telescopic shaft is detachably connected to the punch through the bolt plate, realizing the quick assembly and disassembly of the die and the punch without having to remove a large number of bolts one by one, greatly shortening the die change time, and achieving the effect of improving production line efficiency and reducing downtime.

[0014] 2. This utility model forms a standardized positioning benchmark by setting a second guide post and a second guide sleeve on the side plates of the punch and die, and guiding and positioning the side fixing plate with the end of the truncated cone. This avoids the error of manual visual calibration, ensures the coaxiality accuracy of the punch and die, prevents the bending angle deviation of the sheet metal and edge wrinkling, and achieves the effect of improving the stability of bending quality and ensuring product consistency.

[0015] 3. This utility model uses a clamping sleeve at the bottom of a precision stud to tightly press the side fixing plate onto the processing table, preventing the mold from loosening; at the same time, the first guide post on the support frame cooperates with the first guide sleeve to guide the up and down movement of the bolt plate and the punch, preventing the punch from shifting and ensuring the stability of the mold position during bending, thereby enhancing structural stability and improving processing reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is one of the partial structural schematic diagrams of this utility model; Figure 3 This is the second partial structural schematic diagram of the present utility model; Figure 4 This is the third partial structural schematic diagram of this utility model; The meanings of the labels in the diagram are as follows: 1. Machining table; 10. Positioning protrusion; 11. Frustum end; 12. Precision stud; 2. Support frame; 20. Feeding hole; 21. Hydraulic cylinder; 22. Bolt plate; 23. Punch; 24. First guide post; 25. First guide sleeve; 3. Die; 30. Side fixing plate; 31. Clamping sleeve; 32. Nut; 4. Side plate; 40. Second guide post; 41. Second guide sleeve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-4 This utility model provides a technical solution: a multi-segment quick-change mold structure for a bending machine, including a processing table 1. Multiple sets of positioning protrusions 10 are fixedly installed on the upper surface of the processing table 1. A frustum end 11 is fixedly installed on the top surface of the positioning protrusion 10. A precision stud 12 is fixedly installed at the top of the frustum end 11. A support frame 2 is also fixedly installed on the upper surface of the processing table 1. Multiple hydraulic cylinders 21 are fixedly installed on the top plate of the support frame 2. The telescopic shaft ends of the hydraulic cylinders 21 are detachably mounted via multiple fastening bolts. The machine table 1 is equipped with a punch 23 and multiple dies 3 are also installed on its upper surface. Side fixing plates 30 are fixedly installed on both sides of the die 3. The side fixing plates 30 are sleeved on the corresponding positioning protrusions 10. Nuts 32 that are pressed against the side fixing plates 30 are threaded onto the precision studs 12. The punch 23 and the die 3 are positioned by the second guide post 40 and the second guide sleeve 41, which makes it easy to install and remove the punch 23 and the die 3. At the same time, the second guide post 40 and the second guide sleeve 41 guide the installation to ensure the installation accuracy.

[0019] In this embodiment, the frustum end 11 is frustum-shaped, and the diameter of the bottom surface of the frustum end 11 is equal to the outer diameter of the positioning protrusion 10. The outer diameter of the frustum end 11 decreases from bottom to top. The side fixing plate 30 is provided with corresponding through holes. The side fixing plate 30 of the die 3 can smoothly fit into the positioning protrusion 10 along the inclined surface of the frustum end 11 without repeatedly aligning the holes, so that the side fixing plate 30 can quickly complete the initial positioning and shorten the installation preparation time of the die 3.

[0020] Specifically, a clamping sleeve 31 is fixedly installed at the bottom of the precision stud 12. The clamping sleeve 31 is sleeved on the outside of the frustum end 11 and the positioning protrusion 10. The clamping sleeve 31 presses the side fixing plate 30 onto the processing table 1. When the nut 32 is tightened, the clamping sleeve 31 is subjected to force to press the side fixing plate 30 tightly onto the processing table 1, avoiding gaps between the side fixing plate 30 and the processing table 1, so that the die 3 is stable after installation and prevents the die 3 from shifting during bending, which would affect the processing accuracy.

[0021] Furthermore, side plates 4 are fixedly installed on both the left and right sides of the punch 23 and the die 3. The second guide post 40 is fixedly installed on the bottom surface of the upper side plate 4, and the second guide sleeve 41 is fixedly installed on the top surface of the lower side plate 4. The second guide post 40 is located inside the second guide sleeve 41 and is slidably connected to the second guide sleeve 41, so that the punch 23 and the die 3 are aligned, ensuring their coaxiality and avoiding errors from manual calibration.

[0022] like Figure 1 As shown, feeding holes 20 are provided on both the left and right sides of the support frame 2. The height of the feeding holes 20 is between 10cm and 15cm. The metal sheet can be smoothly inserted into the space between the punch 23 and the die 3 through the feeding holes 20.

[0023] In addition, a bolt plate 22 is fixedly installed at the end of the telescopic shaft of the hydraulic cylinder 21. The punch 23 is fixedly connected to the bolt plate 22 by multiple fastening bolts. The punch 23 can be quickly replaced by removing the bolts, which reduces the difficulty of replacing the punch 23 and improves the efficiency of mold replacement.

[0024] It is worth noting that two symmetrical first guide posts 24 are fixedly installed on the upper surface of the bolt plate 22. A first guide sleeve 25 is fixedly installed at the corresponding position on the bottom surface of the top plate of the support frame 2. The first guide sleeve 25 is fitted on the first guide post 24 and slidably connected to the first guide post 24. When the hydraulic cylinder 21 drives the bolt plate 22 to move up and down, the first guide post 24 slides along the first guide sleeve 25, restricting the movement trajectory of the bolt plate 22 and ensuring that the punch 23 rises and falls vertically.

[0025] In this embodiment, the second guide post 40, the second guide sleeve 41, and the corresponding punch 23 and die 3 are matched as a set. After the die 3 is installed on the processing table 1, the punch 23 is lifted upwards, the second guide post 40 is located inside the second guide sleeve 41, and then the punch 23 is installed on the bolt plate 22 to ensure the accuracy of the punch 23 and the die 3.

[0026] Finally, it should be noted that the hydraulic cylinder 21, the corresponding hydraulic source, the corresponding control system, and the external power supply involved in this utility model are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and the matching controller and power supply, are connected by wires. The specific connection method should refer to the working principle in this utility model. The electrical connections between each electrical component are completed in the order of operation. The detailed connection methods are all technologies known in the art.

[0027] When using the multi-stage quick-change mold structure of the bending machine of this utility model, the side fixing plate 30 of the concave mold 3 is inserted into the positioning protrusion 10 along the inclined surface of the end 11 of the truncated cone. After the clamping sleeve 31 is put on, the nut 32 is tightened on the precision stud 12 for fixation. The punch 23 is connected to the bolt plate 22 of the telescopic shaft of the hydraulic cylinder 21 through the fastening bolts to ensure that the punch 23 is aligned with the second guide post 40 and the second guide sleeve 41 of the concave mold 3, and the mold assembly is completed. Start the equipment and insert the metal sheet through the feeding hole 20 of the support frame 2 into the space between the punch 23 and the die 3; the hydraulic cylinder 21 drives the bolt plate 22 to descend, the first guide post 24 slides along the first guide sleeve 25 to guide, the punch 23 presses down accordingly, and is precisely positioned by the second guide post 40 and the second guide sleeve 41 to complete the bending of the sheet; Mold replacement: Remove the fastening bolts between the punch 23 and the bolt plate 22, and replace the punch 23; unscrew the nut 32 of the precision stud 12, remove the clamping sleeve 31, and the die 3 can be replaced. Repeat the installation steps to adapt to new processing requirements and achieve quick mold change.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-section die quick-change structure of a bending machine, comprising a machining table (1), characterized in that: Multiple sets of positioning protrusions (10) are fixedly installed on the upper surface of the processing table (1). A frustum end (11) is fixedly installed on the top surface of the positioning protrusion (10). A precision stud (12) is fixedly installed on the top end of the frustum end (11). A support frame (2) is also fixedly installed on the upper surface of the processing table (1). Multiple hydraulic cylinders (21) are fixedly installed on the top plate of the support frame (2). The telescopic shaft ends of the hydraulic cylinders (21) are detachably installed with multiple fastening bolts. The punch (23) and the upper surface of the processing table (1) are also equipped with multiple dies (3). Side fixing plates (30) are fixedly installed on both the left and right sides of the die (3). The side fixing plates (30) are sleeved on the corresponding positioning protrusions (10). The precision stud (12) is threaded with a nut (32) that is pressed on the side fixing plate (30). The punch (23) and the die (3) are positioned by the second guide post (40) and the second guide sleeve (41).

2. The multi-stage die quick-change structure of a bending machine according to claim 1, characterized in that: The frustum end (11) is frustum shaped, and the bottom diameter of the frustum end (11) is equal to the outer diameter of the positioning protrusion (10). The outer diameter of the frustum end (11) decreases sequentially from bottom to top.

3. The multi-stage die quick-change structure of a bending machine according to claim 1, characterized in that: A clamping sleeve (31) is fixedly installed at the bottom end of the precision stud (12). The clamping sleeve (31) is sleeved on the outside of the frustum end (11) and the positioning protrusion (10). The clamping sleeve (31) presses the side fixing plate (30) onto the processing table (1).

4. The multi-stage die quick change structure of a bending machine according to claim 1, characterized in that: Side plates (4) are fixedly installed on both the left and right sides of the punch (23) and the die (3). The second guide post (40) is fixedly installed on the bottom surface of the upper side plate (4). The second guide sleeve (41) is fixedly installed on the top surface of the lower side plate (4). The second guide post (40) is located inside the second guide sleeve (41) and is slidably connected to the second guide sleeve (41).

5. The multi-stage die quick change structure of a bending machine according to claim 1, characterized in that: Feeding holes (20) are provided on both the left and right sides of the support frame (2), and the height of the feeding holes (20) is between 10cm and 15cm.

6. The multi-stage die quick change structure of a bending machine according to claim 1, characterized in that: The telescopic shaft end of the hydraulic cylinder (21) is fixedly installed with a bolt plate (22), and the punch (23) is fixedly connected to the bolt plate (22) by a plurality of fastening bolts.

7. The multi-stage quick-change mold structure of the bending machine according to claim 6, characterized in that: Two symmetrical first guide posts (24) are fixedly installed on the upper surface of the bolt plate (22). A first guide sleeve (25) is fixedly installed at the corresponding position on the bottom surface of the top plate of the support frame (2). The first guide sleeve (25) is sleeved on the first guide post (24) and slidably connected to the first guide post (24).

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