Metal plate numerical control bending device

Abstract

The utility model relates to the technical field of metal plate bending, in particular to a metal plate numerical control bending device which comprises a bending machine body, an upper die cutter and a lower die are arranged on the bending machine body, two pistons are connected in the upper die cutter in a sliding mode, a lubricating agent and an acid agent are arranged in the upper die cutter, and the lower die cutter is connected with the upper die cutter in a sliding mode. Two rubber pads are fixedly connected to the inner wall of the upper die cutter, slim holes are formed in the two rubber pads, a liquid outlet hole is formed in the bottom of the upper die cutter, and a driving assembly is arranged on the bending machine body; according to the bending die, the surface of a material can be subjected to acid pickling or lubricating treatment before bending, so that the friction coefficient of the surface of the material can be adjusted, good friction force can be formed between the bending die and the material, and springback caused by insufficient friction force is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sheet metal bending, in particular to a metal sheet metal numerical control bending device. Background Art

[0002] Sheet metal bending is a common process in metal processing, which is used to bend metal sheets into specific shapes. The bending process is usually completed by a bending machine in conjunction with a bending die.

[0003] During the bending process, different sheet metal materials have different surface smoothness, which may cause different problems. For example, the problem of springback may easily occur during the bending process due to insufficient friction between the bending mold and the material surface. Therefore, a new type of bending device is needed to avoid springback. Utility Model Content

[0004] In order to solve the above technical problems, the utility model proposes a CNC bending device for metal sheet metal, which can pickle or lubricate the surface of the material before bending, so as to adjust the friction coefficient of the material surface so that there can be better friction between the bending mold and the material, thereby avoiding rebound due to insufficient friction.

[0005] The technical solution for achieving the purpose of the utility model is: a CNC bending device for metal sheet metal, including a bending machine body, an upper die and a lower die are provided on the bending machine body, two pistons are slidably connected to the interior of the upper die, and a lubricant and an acid agent are provided inside the upper die, two rubber pads are fixedly connected to the inner wall of the upper die, both rubber pads are provided with fine holes, a liquid outlet is provided at the bottom of the upper die, and a drive assembly is provided on the bending machine body.

[0006] Preferably, the lubricant and the acid are respectively located between two pistons and two rubber pads, and two sealing covers are provided on the upper die cutter.

[0007] Preferably, a plurality of inclined plates are fixedly connected to the inner wall of the upper die cutter, and the plurality of inclined plates are staggered and inclined downward.

[0008] Preferably, the driving assembly includes a shell, a motor, a pressure plate and a hose, the two shells are respectively fixedly connected to the two sides of the upper mold knife, the two motors are respectively fixedly connected to the inner walls of the two shells, the two pressure plates are respectively slidably connected to the inside of the two shells, and the two pressure plates are respectively fixedly connected to the output shafts of the two motors, and the two hoses are respectively fixedly connected to the two ends of the upper mold knife and between the two shells.

[0009] Preferably, the driving assembly further comprises hydraulic oil, which is disposed inside the two outer shells and is connected to the interior of the upper die cutter via a hose.

[0010] Compared with the prior art, the present invention has the following significant advantages:

[0011] In the utility model, by arranging lubricants and acid agents, when the upper die cutter moves downward and is about to start to extrude the material, the upper die cutter can be stopped from moving. At the same time, according to the smoothness of the surface of the material, the start of the two motors is controlled by a computer. After the two motors are started, the output shaft moves downward, driving the pressure plate to press down, so that the hydraulic oil can be squeezed into the cavity inside the upper die cutter through the hose, and then the piston is pushed. When the piston moves, the lubricant and acid agent are squeezed. The squeezed lubricant and acid agent will then squeeze the rubber pad, causing the rubber pad to bulge. At this time, the fine holes will be expanded, so that the lubricant and acid agent can pass through the fine holes. The lubricant and acid agent that pass through the fine holes will flow downward in sequence on multiple inclined plates. The lubricant and acid need to pass through multiple inclined plates, so in this process, the lubricant and acid will be mixed more evenly and finally discharged from the liquid outlet. Since the upper die knife is close to the surface of the material, there will be a small gap between the material and the upper die knife. The lubricant and acid discharged from the liquid outlet will infiltrate the material and the surface of the upper die knife along the gap. When liquid is seen seeping out from the surface of the material, it means that the contact surface between the upper die knife and the material has been completely infiltrated by the lubricant and acid. At this time, the motor can be turned off and the upper die knife can be moved down to complete the bending. At this time, since the surface of the material has been treated with lubricant and acid, there will be good friction between the upper die knife and the material, so there will be no rebound problem.

[0012] In the present invention, by controlling the downward movement speed of the two motor output shafts, the discharge speed of the lubricant and the acid can be controlled, thereby adjusting the mixing ratio of the lubricant and the acid. By adjusting the mixing ratio of the lubricant and the acid, the surface of the material can be treated to different degrees according to the different materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a cross-sectional view of the internal structure of the middle and upper die cutter of the utility model;

[0016] Figure 3 This utility model Figure 2 An enlarged view of the structure of part A is shown;

[0017] Figure 4 It is a cross-sectional view of the internal structure of the shell in the utility model.

[0018] Description of reference numerals:

[0019] 1. Press brake body; 2. Upper die cutter; 21. Piston; 22. Lubricant; 23. Acid; 24. Sealing cover; 25. Rubber pad; 26. Fine hole; 27. Inclined plate; 28. Liquid outlet; 3. Lower die; 4. Drive assembly; 41. Housing; 42. Motor; 43. Press plate; 44. Hydraulic oil; 45. Hose. DETAILED DESCRIPTION

[0020] The following is a detailed description of the present invention, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] The utility model provides a metal sheet CNC bending device through improvement. The technical solution of the utility model is:

[0022] like Figures 1-4 As shown, a metal sheet CNC bending device includes a bending machine body 1, an upper die 2 and a lower die 3 are provided on the bending machine body 1, two pistons 21 are slidably connected to the interior of the upper die 2, and a lubricant 22 and an acid agent 23 are provided inside the upper die 2, two rubber pads 25 are fixedly connected to the inner wall of the upper die 2, both rubber pads 25 are provided with fine holes 26, and a liquid outlet 28 is provided at the bottom of the upper die 2, and a driving component 4 is provided on the bending machine body 1. When the lubricant 22 processes the material, it can reduce the friction generated when the material and the upper die 2 contact, and the acid agent 23 can corrode the surface oxide layer of the material and increase the friction between the material and the upper die 2. Therefore, the lubricant 22 and the acid agent 23 are mixed in different proportions and then the surface of the material is processed, so that different materials can generate good friction with the upper die 2 after processing, thereby avoiding rebound during bending.

[0023] Furthermore, the lubricant 22 and the acid agent 23 are respectively located between the two pistons 21 and the two rubber pads 25 , and two sealing covers 24 are provided on the upper die cutter 2 .

[0024] Furthermore, a plurality of inclined plates 27 are fixedly connected to the inner wall of the upper die knife 2, and the plurality of inclined plates 27 are staggered and inclined downward. Since a plurality of inclined plates 27 are provided, when the lubricant 22 and the acid agent 23 are discharged from the pores 26, they need to flow along the plurality of inclined plates 27 before they can be discharged from the liquid outlet 28. In this process, the lubricant 22 and the acid agent 23 can be mixed. After the lubricant 22 and the acid agent 23 are mixed, an acidic lubricating liquid will be formed. When the proportion of the lubricant 22 is larger, the lubricating effect is greater than the acid etching effect, and it mainly plays a lubricating role. When the proportion of the acid agent 23 is larger, the acid etching effect is greater.

[0025] Furthermore, the drive assembly 4 includes a shell 41, a motor 42, a pressure plate 43 and a hose 45. The two shells 41 are respectively fixedly connected to the two sides of the upper mold knife 2, the two motors 42 are respectively fixedly connected to the inner walls of the two shells 41, the two pressure plates 43 are respectively slidably connected to the inside of the two shells 41, and the two pressure plates 43 are respectively fixedly connected to the output shafts of the two motors 42, and the two hoses 45 are respectively fixedly connected between the two ends of the upper mold knife 2 and the two shells 41.

[0026] Furthermore, the drive assembly 4 also includes hydraulic oil 44, which is arranged inside the two outer shells 41. The hydraulic oil 44 is connected to the interior of the upper mold knife 2 through a hose 45. The movement of the pressure plate 43 is controlled by the motor 42, and the movement of the hydraulic oil 44 is used to control the movement of the piston 21, so that the acid 23 and the lubricant 22 can be squeezed.

[0027] The specific working method is: first, remove the two sealing covers 24, pour the lubricant 22 and the acid 23 into the two cavities in the upper die knife 2 respectively, and then tighten the sealing cover 24. When bending, the bending machine body 1 realizes the up and down movement of the upper die knife 2 through CNC. When the upper die knife 2 moves down and is about to start to extrude the material, the upper die knife 2 is stopped. At the same time, according to the smoothness of the material surface, the two motors 42 are started by the computer. After the two motors 42 are started, the output shaft moves downward, driving the pressing plate 43 to press down, and then the material can be bent. The hydraulic oil 44 is squeezed into the cavity inside the upper die cutter 2 through the hose 45, and then the piston 21 is pushed. When the piston 21 moves, the lubricant 22 and the acid 23 are squeezed. The squeezed lubricant 22 and the acid 23 will squeeze the rubber pad 25, causing the rubber pad 25 to bulge. At this time, the pores 26 will be expanded, so that the lubricant 22 and the acid 23 can pass through the pores 26. The lubricant 22 and the acid 23 that pass through the pores 26 will flow downward on the multiple inclined plates 27 in sequence. Since the lubricant 22 and the acid 23 need to pass through multiple inclined plates 27, the lubricant 22 and the acid 23 will flow downward on the multiple inclined plates 27 in sequence. Inclined plate 27, so in this process, the lubricant 22 and the acid 23 will also be mixed more evenly, and finally discharged from the liquid outlet 28. Since the upper die knife 2 is close to the surface of the material, there will be a small gap between the material and the upper die knife 2. The lubricant 22 and the acid 23 discharged from the liquid outlet 28 will infiltrate the material and the surface of the upper die knife 2 along the gap. When liquid is seen seeping out from the surface of the material, it means that the contact surface between the upper die knife 2 and the material has been completely infiltrated by the lubricant 22 and the acid 23. At this time, the motor 42 can be turned off. , continue to move the upper die knife 2 downward to complete the bending. At this time, since the surface of the material has been treated with the lubricant 22 and the acid agent 23, there will be good friction between the upper die knife 2 and the material, so that there will be no rebound problem. By controlling the downward speed of the output shafts of the two motors 42, the discharge speed of the lubricant 22 and the acid agent 23 can be controlled, thereby adjusting the mixing ratio of the lubricant 22 and the acid agent 23. By adjusting the mixing ratio of the lubricant 22 and the acid agent 23, the surface of the material can be treated to different degrees according to different materials.

[0028] The technical means disclosed in the present invention are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacements of the above technical features. Matters not covered in the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A CNC bending device for sheet metal, comprising a bending machine body (1), wherein an upper die blade (2) and a lower die (3) are provided on the bending machine body (1), and characterized in that: The upper die cutter (2) is slidably connected to two pistons (21), and a lubricant (22) and an acid agent (23) are provided inside the upper die cutter (2). Two rubber pads (25) are fixedly connected to the inner wall of the upper die cutter (2), and both rubber pads (25) are provided with fine holes (26). A liquid outlet hole (28) is provided at the bottom of the upper die cutter (2). A driving component (4) is provided on the bending machine body (1).

2. The metal sheet CNC bending device according to claim 1, characterized in that: The lubricant (22) and the acid agent (23) are respectively located between the two pistons (21) and the two rubber pads (25), and two sealing covers (24) are provided on the upper die knife (2).

3. The metal sheet CNC bending device according to claim 1, characterized in that: A plurality of inclined plates (27) are fixedly connected to the inner wall of the upper die knife (2), and the plurality of inclined plates (27) are staggered and tilted downward.

4. The metal sheet CNC bending device according to claim 1, characterized in that: The driving assembly (4) comprises a housing (41), a motor (42), a pressure plate (43) and a hose (45), wherein the two housings (41) are respectively fixedly connected to the two sides of the upper die knife (2), the two motors (42) are respectively fixedly connected to the inner walls of the two housings (41), the two pressure plates (43) are respectively slidably connected to the inside of the two housings (41), and the two pressure plates (43) are respectively fixedly connected to the output shafts of the two motors (42), and the two hoses (45) are respectively fixedly connected between the two ends of the upper die knife (2) and the two housings (41).

5. The metal sheet CNC bending device according to claim 4, characterized in that: The driving assembly (4) further comprises hydraulic oil (44), wherein the hydraulic oil (44) is arranged inside the two housings (41), and the hydraulic oil (44) is communicated with the interior of the upper die knife (2) through a hose (45).

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