Die for bending closed structure and using method

Abstract

The invention discloses a die for bending a closed structure and a machining method, and relates to the technical field of closed bending of sheet metal workpieces, the die is arranged at the bottom of a bending machine, and the die comprises an upper die body and a lower die body; according to the die of the bending closed structure, closed bending operation can be rapidly conducted on a sheet metal workpiece, the bending angle and shape of the workpiece can be accurately controlled, the precision and consistency of bending of the workpiece each time are ensured, dependence on welding, riveting and other complex technologies is reduced, the product cost is reduced, the production period is shortened, and the production efficiency is improved. According to the mold with the bent closed structure, through the hollowed-out design of the middle of the upper mold body, the interference problem caused by the fact that a machined part is bent into the closed structure in the bending process can be effectively avoided, the bent closed machined part can be conveniently taken out from the rotating beam assembly, the operation difficulty is reduced, and the operation convenience and safety are improved; and the process requirement for closed bending of sheet metal workpieces can be met.

Description

Technical Field

[0001] The invention belongs to the technical field of closed bending of sheet metal processing parts, and in particular is a mold of a closed bending structure and a use method thereof. Background Art

[0002] Bending is one of the most important and widely used technologies in sheet metal manufacturing. The basic principle of sheet metal bending is to use the plastic deformation of metal to manufacture parts or components of the required shape and size. In many sheet metal structural products, bending can replace some complex component structures such as welding, riveting, and bolting; compared with welding, riveting, and bolting, bending processing is easier to accurately control the shape and size of the plate, and has higher accuracy and repeatability.

[0003] In the related technology, sheet metal parts usually require bending machines, molds, etc. during the bending process; in sheet metal bending, square tubes and round tubes are the most common bending parts, and the bending sections of such parts need to be processed into semi-enclosed or fully enclosed structures. However, conventional bending molds and bending processes cannot completely complete the bending of such parts. Most of them can only use welding, riveting, bolts, etc. to replace bending, but their structures have changed from the original design, resulting in increased product costs and extended manufacturing cycles. In addition, commonly used bending molds have interference problems such as difficulty in removing the workpiece from the mold after closed bending or inability to perform closed bending.

[0004] Therefore, there is an urgent need for a mold with a closed bending structure and a method of use, which can quickly perform closed bending on sheet metal workpieces, and at the same time avoid interference problems such as difficulty in removing the workpiece from the mold after closed bending or inability to perform closed bending, thereby meeting the process requirements for closed bending of sheet metal workpieces. Summary of the invention

[0005] The object of the present invention is to provide a mold of a bent closed structure and a method of use to solve at least one aspect of the problems and defects raised in the above-mentioned background technology.

[0006] Specifically, the first aspect of the present invention discloses a mold of a bending closed structure, which is arranged at the bottom of a bending machine, comprising:

[0007] An upper mold body and a lower mold body;

[0008] The middle part of the upper mold body is hollowed out, and the upper mold body is divided into a left mold body and a right mold body, and the height of the left mold body is greater than that of the right mold body;

[0009] The left mold body is provided with a groove near the bottom, and a rotating beam assembly is rotatably arranged in the groove;

[0010] A locking slot is provided on one side of the right mold body, a locking assembly is provided in the locking slot, a locking hole is provided at the bottom of the right mold body, and the locking hole is communicated with the locking slot;

[0011] A positioning and retracting assembly is provided on the other side of the right mold body, and the rotating beam assembly is locked between the locking assembly and the positioning and retracting assembly in a locked state;

[0012] A mold cutter body is provided at the bottom of the rotating beam assembly;

[0013] A processing groove for bending the workpiece is arranged in the middle of the lower mold body along the length of the lower mold body, and the mold cutter body is arranged in the processing groove.

[0014] The mold of the bent closed structure according to the present invention has at least the following beneficial effects:

[0015] The mold of the bending closed structure of the present invention can quickly perform closed bending operations on sheet metal workpieces, can accurately control the bending angle and shape of the workpiece, ensure the accuracy and consistency of each bending of the workpiece, and reduce the dependence on complex processes such as welding and riveting, reduce product costs and production cycles, make the bending process smoother and more efficient, reduce the bending and debugging time of the workpiece, and thus improve the overall production efficiency;

[0016] The mold of the bending closed structure of the present invention can effectively avoid interference problems caused by the workpiece being bent into a closed structure during the bending process through the hollow design of the middle part of the upper mold body. Through the height difference between the left mold body and the right mold body and the setting of the rotating beam assembly, the rotating beam assembly can be effectively fixed between the locking assembly and the positioning and retracting assembly, so as to position the mold tool body set at the bottom of the rotating beam assembly to ensure the accuracy of the bending operation of the workpiece; and after the bending and closing of the workpiece is completed, the lock of the rotating beam assembly can be quickly released, which is convenient for removing the bent and closed workpiece from the rotating beam assembly, reducing the difficulty of operation and improving the convenience and safety of operation; at the same time, the mold has a simple structure, is easy to manufacture and maintain, and can meet the process requirements of closed bending of sheet metal workpieces.

[0017] As a further solution of the present invention: bearings are correspondingly arranged on both sides of the groove, a rotating shaft is penetrated through one end of the rotating beam assembly, and both ends of the rotating shaft are correspondingly arranged in the bearings respectively.

[0018] Since bearings are provided on both sides of the groove, a rotating shaft is provided at one end of the rotating beam assembly, and both ends of the rotating shaft are provided in the bearings respectively, so that the rotating beam assembly can rotate horizontally in the bearings on both sides of the groove through the rotating shaft; when the workpiece needs to be bent, the rotating beam assembly is rotated counterclockwise in the horizontal direction so that the rotating beam assembly can be moved between the locking assembly and the positioning and retracting assembly, and the rotating beam assembly is positioned and locked, so that the rotating beam assembly drives the mold cutter body to be positioned above the processing groove of the lower mold body, so that the workpiece can be pressurized and bent; after the bending of the workpiece is completed, a The workpiece in a closed state passes through the hollow part of the upper mold body and is wrapped around the rotating beam assembly; after unlocking the locking assembly, the positioning and retracting assembly pushes out the rotating beam assembly, and the rotating beam assembly rotates clockwise in the horizontal direction, so that one end of the rotating beam assembly forms a free end, and the workpiece in a closed state wrapped around the rotating beam assembly is taken out from the free end; the mold can accurately and flexibly perform closed bending operations on the workpiece, effectively solving the interference problem that the workpiece is difficult to remove from the mold after closed bending or cannot be closed bent, improving the convenience and flexibility of operation, and ensuring bending accuracy and efficiency.

[0019] As a further solution of the present invention: a boss is provided along the bottom length of the rotating beam assembly, a mounting groove is provided along the top length of the mold cutter body, and the rotating beam assembly is connected to the mounting groove of the mold cutter body through the boss.

[0020] As a further solution of the present invention: a plurality of countersunk holes are evenly arranged on the top of the rotating beam assembly, and a plurality of threaded holes are arranged on the top of the mold cutter body corresponding to the plurality of the countersunk holes.

[0021] By setting a boss along the bottom length of the rotating beam assembly and setting a mounting groove along the top length of the mold cutter body, the rotating beam assembly is connected to the mounting groove of the mold cutter body through the boss; in addition, a number of countersunk holes are evenly arranged on the top of the rotating beam assembly, and a number of threaded holes are arranged on the top of the mold cutter body corresponding to the number of countersunk holes, so that the boss displacement or shaking of the rotating beam assembly can be effectively limited on both sides of the mounting groove of the mold cutter body. At the same time, the rotating beam assembly and the mold cutter body are threadedly connected through the threaded holes, which can effectively enhance the connection stability and reliability of the rotating beam assembly and the mold cutter body, ensure the accuracy and consistency of the bending of the workpiece, and improve the bending quality of the workpiece.

[0022] As a further solution of the present invention: the locking assembly includes a cover plate, a locking block is arranged on the inner side of the cover plate, a first spring is arranged on the top of the locking block, a convex strip is extended on one side of the locking block, a locking shaft is arranged at the bottom of the convex strip, and a rotating handle is arranged on the outer side of the cover plate, and the rotating handle is connected to the locking shaft.

[0023] As a further solution of the present invention: the bottom of the locking block is provided with an inclined surface, and the bottom of the locking block extends to the outside of the locking hole.

[0024] As a further solution of the present invention: the positioning and retracting assembly includes a positioning stopper, a hollow cylinder is arranged on one side of the positioning stopper, and the hollow cylinder is connected to the positioning stopper.

[0025] As a further solution of the present invention: a second spring is arranged in the hollow cylinder, a spring block is arranged on one side of the second spring, and an adjustable screw is arranged on the other side of the second spring.

[0026] As a further solution of the present invention: a flange is provided on one side of the hollow cylinder close to the positioning block, the inner side of the top of the spring block abuts against the flange, and the bottom of the spring block extends to the outside of the positioning block.

[0027] The locking assembly includes a cover plate, a locking block is arranged on the inner side of the cover plate, a first spring is arranged on the top of the locking block, a convex strip is extended on one side of the locking block, a locking shaft is arranged at the bottom of the convex strip, a rotating handle is arranged on the outer side of the cover plate, and the rotating handle is connected to the locking shaft; an inclined surface is arranged at the bottom of the locking block, and the bottom of the locking block extends to the outside of the lock hole; the positioning and retracting assembly includes a positioning block, a hollow cylinder is arranged on one side of the positioning block, and the hollow cylinder is connected to the positioning block; a second spring is arranged in the hollow cylinder, a spring block is arranged on one side of the second spring, and an adjustable screw is arranged on the other side of the second spring; a flange is arranged on the side of the hollow cylinder close to the positioning block, the inner side of the top of the spring block abuts against the flange, and the bottom of the spring block extends to the outside of the positioning block.

[0028] When it is necessary to lock the rotating beam assembly, the rotating beam assembly rotates counterclockwise in the horizontal direction, one side of the rotating beam assembly abuts against the inclined surface at the bottom of the locking block and generates a horizontal force, and the rotating beam assembly continues to rotate counterclockwise in the horizontal direction, further applying pressure to the inclined surface at the bottom of the locking block. At this time, the horizontal force is converted into a vertical force through the inclined surface, so that the first spring is compressed, and the bottom of the locking block is retracted into the locking slot through the locking hole; at this time, the rotating beam assembly continues to rotate counterclockwise in the horizontal direction, and one side of the rotating beam assembly applies a horizontal force to the spring block of the positioning and retracting assembly, so that the second spring is compressed and the spring block is retracted into the hollow cylinder; when the rotating beam assembly contacts the inner side wall of the positioning stopper, the rotating beam assembly as a whole passes over the bottom of the locking hole, and the resilience of the first spring pushes the locking block out of the locking hole, so that the rotating beam assembly is locked between the locking assembly and the positioning and retracting assembly, completing the fastening of the rotating beam assembly;

[0029] When the workpiece completes the final closed bending, the rotating handle is turned, which drives the locking shaft to rotate and drives the convex strip on one side of the locking block to move the entire locking block upward, the first spring is compressed, and the bottom of the locking block is retracted into the locking slot through the locking hole; at this time, the rotating beam assembly is unlocked, and the rebound force of the second spring ejects the spring block, so that the spring block pushes the rotating beam assembly out and rotates horizontally clockwise to complete the unlocking of the rotating beam assembly, thereby taking out the closed and bent workpiece.

[0030] By adjusting the depth of the adjustable screw in the hollow cylinder, the compression force of the second spring can be adjusted, so that when the rotating beam assembly is ejected by the spring block, the ejection force of the spring block can be controlled, thereby controlling the speed at which the rotating beam assembly rotates clockwise in the horizontal direction to disengage from the positioning block. This method is suitable for workpieces of different weights, ensuring that the workpieces after bending and sealing maintain a stable posture on the rotating beam assembly, preventing the workpieces from shaking or vibrating on the rotating beam assembly due to excessive speed during ejection, causing wear on the rotating beam assembly and the workpiece, and effectively improving the stability and safety of the mold when removing workpieces.

[0031] By arranging a flange on one side of the hollow cylinder close to the positioning block, the inner side of the top of the spring block abuts against the flange, so that when the spring block is ejected by the second spring, the flange can effectively limit the ejection length of the spring block, thereby preventing the rebound force of the second spring from being too large and causing the spring block to eject outside the hollow cylinder.

[0032] The second aspect of the present invention also discloses a method for using a mold of a bent closed structure, comprising the following steps:

[0033] S1, rotating the rotating beam assembly horizontally counterclockwise to lock the rotating beam assembly between the locking assembly and the positioning and retracting assembly;

[0034] S2, the bending machine drives the mold to bend the workpiece, and the mold cutter body presses the workpiece into the processing groove of the lower mold body to bend it. After bending the workpiece for multiple times, the workpiece is closed;

[0035] S3, after the workpiece is bent to form a closed shape, the workpiece is wound around the rotating beam assembly from the hollow portion of the upper mold body;

[0036] S4, unlocking the locking assembly, and the positioning and retracting assembly pushes the rotating beam assembly out in a clockwise horizontal direction to remove the workpiece.

[0037] By using the mold with a closed bending structure, sheet metal workpieces can be quickly bent multiple times and closed bending can be achieved. Compared with the bending molds or bending methods of traditional workpieces, it can effectively avoid the interference of the workpiece being difficult to remove from the mold after closed bending or being unable to perform closed bending. At the same time, the bending accuracy and efficiency of the workpiece are improved, meeting the process requirements of closed bending of sheet metal workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0039] Figure 1 It is a schematic diagram of the mold explosion structure of a bending closed structure;

[0040] Figure 2 It is a schematic diagram of the mold locking state structure of a bending closed structure;

[0041] Figure 3 It is a schematic diagram of the mold unlocking state of a bending closed structure;

[0042] Figure 4 It is a schematic diagram of the main structure of a mold with a bent closed structure;

[0043] Figure 5 It is a schematic diagram of a mold structure of a bending closed structure viewed from above;

[0044] Figure 6 It is a schematic diagram of the three-dimensional structure of a mold locking component with a bending closed structure;

[0045] Figure 7 It is a schematic diagram of the side view structure of a mold locking assembly of a bending closed structure;

[0046] Figure 8 It is a three-dimensional structural schematic diagram of a mold positioning and retracting assembly of a bending closed structure;

[0047] Fig. 9 A schematic diagram of a side structural section of a mold positioning and retracting assembly of a bending closed structure;

[0048] Fig.10 The figure is a schematic diagram of the bending of a workpiece by a mold of a bending closed structure.

[0049] Reference numerals:

[0050] 1. Upper mold body; 11. Left mold body; 111. Groove; 112. Bearing; 12. Right mold body; 121. Locking slide groove; 122. Locking hole; 2. Lower mold body; 21. Processing groove; 3. Rotating beam assembly; 31. Rotating shaft; 32. Boss; 33. Countersunk hole; 4. Locking assembly; 41. Cover plate; 42. Locking block; 421. Inclined surface; 43. First spring; 44. Raised strip; 45. Locking shaft; 46. Rotating handle; 5. Positioning and retracting assembly; 51. Positioning stop block; 52. Hollow cylinder; 53. Second spring; 54. Spring block; 55. Adjustable screw; 56. Flange; 6. Mold tool body; 61. Mounting groove. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the technical solution of the present invention is further specifically described below by way of examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation of the present invention.

[0052] In addition, in the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. However, it is apparent that one or more embodiments may be implemented without these specific details. In other cases, known structures and devices are embodied in a schematic manner to simplify the accompanying drawings.

[0053] like Figure 1-5 The embodiment of the present invention shown in the figure is a mold of a bending closed structure, which is arranged at the bottom of a bending machine, and includes: an upper mold body 1 and a lower mold body 2; the middle part of the upper mold body 1 is hollowed out, and the upper mold body 1 is divided into a left mold body 11 and a right mold body 12, and the height of the left mold body 11 is greater than that of the right mold body 12; a groove 111 is arranged near the bottom of the left mold body 11, and a rotating beam assembly 3 is rotatably arranged in the groove 111; when the rotating beam assembly 3 rotates counterclockwise in the horizontal direction to the bottom of the right mold body 12, it fits with the bottom of the right mold body 12; the right mold body 1 A locking groove 121 is provided on one side of 12, and a locking component 4 is provided in the locking groove 121. A locking hole 122 is provided at the bottom of the right mold body 12, and the locking hole 122 is connected to the locking groove 121; a positioning and retracting component 5 is provided on the other side of the right mold body 12, and the rotating beam component 3 is locked between the locking component 4 and the positioning and retracting component 5 in the locked state; a mold cutter body 6 is provided at the bottom of the rotating beam component 3; a processing groove 21 for bending the workpiece is provided in the middle part of the lower mold body 2 along the length of the lower mold body 2, and the mold cutter body 6 is arranged in the processing groove 21.

[0054] Specifically, the mold of the bending closed structure of the present invention can quickly perform closed bending operations on sheet metal workpieces, can accurately control the bending angle and shape of the workpiece, ensure the accuracy and consistency of each bending of the workpiece, and reduce the dependence on complex processes such as welding and riveting, reduce product costs and production cycles, make the bending process smoother and more efficient, reduce the bending and debugging time of the workpiece, and thus improve the overall production efficiency;

[0055] The mold of the bending closed structure of the present invention can effectively avoid interference problems caused by the workpiece being bent into a closed structure during the bending process through the hollow design of the middle part of the upper mold body 1. Through the height difference between the left mold body 11 and the right mold body 12 and the setting of the rotating beam assembly 3, the rotating beam assembly 3 can be effectively fixed between the locking assembly 4 and the positioning and retracting assembly 5, so as to position the mold tool body 6 set at the bottom of the rotating beam assembly 3 to ensure the accuracy of the bending operation of the workpiece; and after the bending and closing of the workpiece is completed, the lock of the rotating beam assembly 3 can be quickly released, which is convenient for removing the bent and closed workpiece from the rotating beam assembly 3, reducing the difficulty of operation and improving the convenience and safety of operation; at the same time, the mold has a simple structure, is easy to manufacture and maintain, and can meet the process requirements of closed bending of sheet metal workpieces.

[0056] like Figure 1 As shown, bearings 112 are correspondingly arranged on both sides of the groove 111 , a rotating shaft 31 is penetrated through one end of the rotating beam assembly 3 , and both ends of the rotating shaft 31 are correspondingly arranged in the bearings 112 .

[0057] Specifically, since bearings 112 are correspondingly arranged on both sides of the groove 111, a rotating shaft 31 is penetrated at one end of the rotating beam assembly 3, and both ends of the rotating shaft 31 are respectively arranged in the bearings 112, so that the rotating beam assembly 3 can rotate horizontally in the bearings 112 on both sides of the groove 111 through the rotating shaft 31; when the workpiece needs to be bent, the rotating beam assembly 3 is rotated counterclockwise in the horizontal direction so that the rotating beam assembly 3 can be moved between the locking assembly 4 and the positioning and retracting assembly 5, and the rotating beam assembly 3 is positioned and locked, so that the rotating beam assembly 3 drives the mold cutter body 6 to be positioned above the processing groove 21 of the lower mold body 2, so that the workpiece can be pressurized and bent. After the bending process of the workpiece is completed, the workpiece in a closed state passes through the hollow part of the upper mold body 1 and is wrapped around the rotating beam assembly 3; after unlocking the locking assembly 4, the positioning and retracting assembly 5 pushes out the rotating beam assembly 3, and the rotating beam assembly 3 rotates clockwise in the horizontal direction, so that one end of the rotating beam assembly 3 forms a free end, and the workpiece in a closed state wrapped around the rotating beam assembly 3 is taken out from the free end; the mold can accurately and flexibly perform closed bending operations on the workpiece, effectively solving the interference problem that the workpiece is difficult to remove from the mold after closed bending or cannot be closed and bent, improving the convenience and flexibility of operation, and ensuring the bending accuracy and efficiency.

[0058] like Figure 1 As shown, a boss 32 is arranged along the bottom length of the rotating beam assembly 3, and a mounting groove 61 is arranged along the top length of the mold cutter body 6. The rotating beam assembly 3 is connected to the mounting groove 61 of the mold cutter body 6 through the boss 32; a plurality of countersunk holes 33 are evenly arranged on the top of the rotating beam assembly 3, and a plurality of threaded holes are arranged on the top of the mold cutter body 6 corresponding to the plurality of countersunk holes 33.

[0059] Specifically, a boss 32 is set along the bottom length of the rotating beam assembly 3, and a mounting groove 61 is set along the top length of the mold cutter body 6, and the rotating beam assembly 3 is connected to the mounting groove 61 of the mold cutter body 6 through the boss 32; in addition, a plurality of countersunk holes 33 are evenly arranged on the top of the rotating beam assembly 3, and a plurality of threaded holes are arranged on the top of the mold cutter body 6 corresponding to the plurality of countersunk holes 33, so that the boss displacement or shaking of the rotating beam assembly 3 can be effectively limited on both sides of the mounting groove 61 of the mold cutter body 6, and at the same time, the rotating beam assembly 3 and the mold cutter body 6 are threadedly connected through the threaded holes, which can effectively enhance the connection stability and reliability of the rotating beam assembly 3 and the mold cutter body 6, ensure the bending accuracy and consistency of the workpiece, and improve the bending quality of the workpiece.

[0060] like Figure 6-10 As shown, the locking assembly 4 includes a cover plate 41, a locking block 42 is arranged on the inner side of the cover plate 41, a first spring 43 is arranged on the top of the locking block 42, a convex strip 44 is extended on one side of the locking block 42, a locking shaft 45 is arranged at the bottom of the convex strip 44, a rotating handle 46 is arranged on the outer side of the cover plate 41, and the rotating handle 46 is connected to the locking shaft 45; an inclined surface 421 is arranged at the bottom of the locking block 42, and the bottom of the locking block 42 extends to the outside of the locking hole 122; the positioning and retracting assembly 5 includes a positioning block 51, a hollow cylinder 52 is arranged on one side of the positioning block 51, and the hollow cylinder 52 is connected to the positioning block 51; a second spring 53 is arranged in the hollow cylinder 52, a spring block 54 is arranged on one side of the second spring 53, and an adjustable screw 55 is arranged on the other side of the second spring 53; a flange 56 is arranged on the side of the hollow cylinder 52 close to the positioning block 51, the inner side of the top of the spring block 54 abuts against the flange 56, and the bottom of the spring block 54 extends to the outside of the positioning block 51.

[0061] When the rotating beam assembly 3 needs to be locked, the rotating beam assembly 3 rotates counterclockwise in the horizontal direction, and one side of the rotating beam assembly 3 abuts against the inclined surface 421 at the bottom of the locking block 42 and generates a horizontal force. The rotating beam assembly 3 continues to rotate counterclockwise in the horizontal direction, and further applies pressure to the inclined surface 421 at the bottom of the locking block 42. At this time, the horizontal force is converted into a vertical force through the inclined surface 421, so that the first spring 43 is compressed, and the bottom of the locking block 42 is retracted into the locking slot 121 through the locking hole 122; at this time, the rotating beam assembly 3 Continue to rotate counterclockwise in the horizontal direction, and one side of the rotating beam assembly 3 applies a horizontal force to the spring block 54 of the positioning and retracting assembly 5, so that the second spring 53 is compressed and the spring block 54 shrinks into the hollow cylinder 52; when the rotating beam assembly 3 contacts the inner wall of the positioning stopper 51, the rotating beam assembly 3 as a whole passes the bottom of the locking hole 122, and the rebound force of the first spring 43 pushes the locking block 42 out of the locking hole 112, so that the rotating beam assembly 3 is locked between the locking assembly 4 and the positioning and retracting assembly 5, completing the fastening of the rotating beam assembly 3;

[0062] When the workpiece completes the final closed bending, the rotating handle 46 is turned, and the rotating handle 46 drives the locking shaft 45 to rotate, and drives the convex strip 44 on one side of the locking block 42, so that the entire locking block 42 moves upward, the first spring 43 is compressed, and the bottom of the locking block 42 shrinks into the locking slot 121 through the locking hole 122; at this time, the rotating beam assembly 3 is unlocked, and the rebound force of the second spring 53 ejects the spring block 54, so that the spring block 54 pushes the rotating beam assembly 3 out and rotates clockwise in the horizontal direction, completing the unlocking of the rotating beam assembly 3, thereby taking out the closed and bent workpiece.

[0063] By adjusting the depth of the adjustable screw 55 in the hollow cylinder 52, the compression force of the second spring 53 can be adjusted, so that when the rotating beam assembly 3 is ejected by the spring block 54, the ejection force of the spring block 54 can be controlled, thereby controlling the speed at which the rotating beam assembly 3 rotates clockwise in the horizontal direction to disengage from the positioning block 51. This can be suitable for workpieces of different weights, ensuring that the workpieces after bending and sealing maintain a stable posture on the rotating beam assembly 3, preventing the workpieces from shaking or vibrating on the rotating beam assembly 3 due to excessive speed during ejection, causing wear on the rotating beam assembly 3 and the workpieces, and effectively improving the stability and safety of the mold when removing workpieces.

[0064] By setting a flange 56 on one side of the hollow cylinder 52 close to the positioning block 51, the inner side of the top of the spring block 54 abuts against the flange 56, so that when the spring block 54 is ejected by the second spring 53, the flange 56 can effectively limit the ejection length of the spring block 54, thereby preventing the rebound force of the second spring 53 from being too large and causing the spring block 54 to be ejected out of the hollow cylinder 52.

[0065] The second aspect of the present invention further discloses a method for using a mold of a bent closed structure, comprising the following steps:

[0066] S1, rotate the rotating beam assembly 3 counterclockwise in the horizontal direction to lock the rotating beam assembly 3 between the locking assembly 4 and the positioning and retracting assembly 5;

[0067] S2, the bending machine drives the mold to bend the workpiece, and the mold cutter body 6 presses the workpiece into the processing groove 21 of the lower mold body 2 for bending. After bending the workpiece for multiple times, the workpiece is closed;

[0068] S3, after the workpiece is bent and closed, the workpiece is wound around the rotating beam assembly 3 from the hollow portion of the upper mold body 1;

[0069] S4, unlock the locking assembly 4, and use the positioning and retracting assembly 5 to push the rotating beam assembly 3 out in a clockwise horizontal direction to remove the workpiece.

[0070] Specifically, through the method of using the mold with a closed bending structure, the sheet metal workpiece can be quickly bent multiple times and closed bending can be achieved. Compared with the bending mold or bending method of traditional workpieces, it can effectively avoid the interference of the workpiece being difficult to remove from the mold after closed bending or the inability to perform closed bending. At the same time, it improves the bending accuracy and efficiency of the workpiece and meets the process requirements of closed bending of sheet metal workpieces.

[0071] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mold of a bending closed structure, arranged at the bottom of a bending machine, characterized in that: include: An upper mold body (1) and a lower mold body (2); The middle part of the upper mold body (1) is hollowed out, and the upper mold body (1) is divided into a left mold body (11) and a right mold body (12), and the height of the left mold body (11) is greater than the height of the right mold body (12); The left mold body (11) is provided with a groove (111) near the bottom, and a rotating beam assembly (3) is rotatably arranged in the groove (111); A locking groove (121) is provided on one side of the right mold body (12), a locking assembly (4) is provided in the locking groove (121), a locking hole (122) is provided at the bottom of the right mold body (12), and the locking hole (122) is communicated with the locking groove (121); A positioning and retracting assembly (5) is provided on the other side of the right mold body (12); the rotating beam assembly (3) is locked between the locking assembly (4) and the positioning and retracting assembly (5) in a locked state; A mold cutter body (6) is provided at the bottom of the rotating beam assembly (3); A processing groove (21) for bending a workpiece is provided in the middle of the lower mold body (2) along the length of the lower mold body (2), and the mold cutter body (6) is arranged in the processing groove (21).

2. The mold of the bent closed structure according to claim 1, characterized in that: Bearings (112) are correspondingly arranged on both sides of the groove (111), a rotating shaft (31) is arranged through one end of the rotating beam assembly (3), and both ends of the rotating shaft (31) are correspondingly arranged in the bearings (112).

3. The mold of the bent closed structure according to claim 2, characterized in that: A boss (32) is provided along the bottom length of the rotating beam assembly (3), and a mounting groove (61) is provided along the top length of the mold cutter body (6); the rotating beam assembly (3) is connected to the mounting groove (61) of the mold cutter body (6) via the boss (32).

4. The mold of the bent closed structure according to claim 3, characterized in that: A plurality of countersunk holes (33) are evenly arranged on the top of the rotating beam assembly (3), and a plurality of threaded holes are arranged on the top of the mold cutter body (6) corresponding to the plurality of countersunk holes (33).

5. The mold of the bent closed structure according to claim 1, characterized in that: The locking assembly (4) comprises a cover plate (41), a locking block (42) is arranged on the inner side of the cover plate (41), a first spring (43) is arranged on the top of the locking block (42), a convex strip (44) is extended from one side of the locking block (42), a locking shaft (45) is arranged at the bottom of the convex strip (44), and a rotating handle (46) is arranged on the outer side of the cover plate (41), and the rotating handle (46) is connected to the locking shaft (45).

6. The mold of the bent closed structure according to claim 5, characterized in that: The bottom of the locking block (42) is provided with an inclined surface (421), and the bottom of the locking block (42) extends to the outside of the locking hole (122).

7. The mold of the bent closed structure according to claim 6, characterized in that: The positioning and retracting assembly (5) comprises a positioning stopper (51), a hollow cylinder (52) is provided on one side of the positioning stopper (51), and the hollow cylinder (52) is connected to the positioning stopper (51).

8. The mold of the bent closed structure according to claim 7, characterized in that: A second spring (53) is arranged in the hollow cylinder (52), a spring block (54) is arranged on one side of the second spring (53), and an adjustable screw (55) is arranged on the other side of the second spring (53).

9. The mold of the bent closed structure according to claim 8, characterized in that: A flange (56) is provided on one side of the hollow cylinder (52) close to the positioning block (51), the inner side of the top of the spring block (54) abuts against the flange (56), and the bottom of the spring block (54) extends outside the positioning block (51).

10. A method for using the mold for bending the closed structure according to any one of claims 1 to 9, characterized in that: The steps include: S1, rotating the rotating beam assembly (3) counterclockwise in the horizontal direction to lock the rotating beam assembly (3) between the locking assembly (4) and the positioning and retracting assembly (5); S2, the bending machine drives the mold to perform a bending operation on the workpiece, and the mold cutter body (6) presses the workpiece into the processing groove (21) of the lower mold body (2) to bend it. After bending the workpiece multiple times, the workpiece is formed into a closed state; S3, after the workpiece is bent and sealed, the workpiece is wound around the rotating beam assembly (3) from the hollow portion of the upper mold body (1); S4, unlocking the locking assembly (4), and the positioning and retracting assembly (5) pushes the rotating beam assembly (3) out in a clockwise horizontal direction to remove the workpiece.

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