Side core-pulling inner flanging forming mold convenient to demold

Abstract

The invention discloses a side core-pulling inner flanging forming mold convenient to demold. The side core-pulling inner flanging forming mold comprises a lower mold base; an upper die holder; the punch anti-roll seat is elastically arranged on the lower die seat and is used for connecting a support of a material belt; the pressing and attaching assembly is elastically and slidably arranged at the bottom of the upper die base; the forming punch assembly is arranged on the punch anti-roll seat in an inserted mode and comprises a first forming block, a second forming block, a first punch and a second punch, and the first punch and the second punch correspond to the first forming block and the second forming block; the slotting tool is positioned at the bottom of the upper die holder and is provided with a wedge-shaped guide block; and the opposite ejection block is arranged on the lower die base in a lateral elastic sliding mode along the punch anti-side base, the outer side of the opposite ejection block is provided with a wedge-shaped face corresponding to the wedge-shaped guide block, and the inner side of the opposite ejection block is provided with a third forming block. The forming die can solve the problems that when a common forming die is used for workpiece negative angle inner flanging machining, workpiece positioning, flanging forming and demolding ejection are inconvenient, the machining efficiency is low, and the forming die is not suitable for continuous die production.

Description

Technical Field

[0001] The invention relates to the technical field of forming moulds, in particular to a side core-pulling inner flanging forming mould which is easy to demould. Background Art

[0002] In the flanging structure die of general materials, it is usually necessary to use the upper die pressing plate and the lower die forming plate to press the workpiece under pressure, and then the upper die punch starts to work to bend the workpiece into shape. However, after the bending of some workpiece structures, the flanging faces inward to form a certain negative angle, so that the upper die punch cannot exit the lower die surface after high-speed stamping, and the workpiece is difficult to demold, resulting in the workpiece being unable to be quickly sent to the next station by the feeder. Common molding dies are inconvenient for workpiece positioning, flanging forming, and demolding and ejection during the negative angle inner flanging processing of the workpiece, resulting in low processing efficiency and are not suitable for continuous die production. Summary of the invention

[0003] The purpose of the present invention is to provide a side-pulling inner flanging forming mold that is easy to demold in order to solve the problems that common forming molds are inconvenient in positioning, flanging forming, and demolding and ejecting when processing the negative-angle inner flanging of the workpiece, resulting in low processing efficiency and being unsuitable for continuous mold production.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme: a side core-pulling inner flanging forming mold which is easy to demould, comprising:

[0005] Lower die seat;

[0006] Upper die seat;

[0007] A punch side-prevention seat, which is elastically plugged into the middle of the lower die seat through a mounting seat, and is used to support the connecting strip between the workpieces to be processed;

[0008] A pressing assembly, which is elastically slidably arranged at the bottom of the upper die seat;

[0009] A forming punch assembly, the bottom of which is provided with a positioning groove corresponding to the punch side-preventing seat, comprising a first forming block and a second forming block positioned on the bottom surface of the pressing assembly, and a first punch and a second punch penetrating the pressing assembly and positioned on the upper die seat;

[0010] A plunger, which is positioned at the bottom of the upper die seat and has a wedge-shaped guide block at the bottom;

[0011] The top block is elastically slidably arranged on the lower die seat along the side of the punch anti-side seat, a wedge surface corresponding to the wedge guide block is arranged on the outer side, and a third forming block is arranged on the inner side. The third forming block is inserted into the workpiece to be processed which is bent into a U shape. The first forming block and the first punch form an inner flanging station, and the second forming block and the second punch form a secondary forming station.

[0012] As a further description of the above technical solution:

[0013] A first elastic member, a second elastic member, and a third elastic member are respectively arranged between the bottom of the punch side protection seat and the lower die seat, the press-attachment assembly and the upper die seat, and the connecting block at the bottom of the top block and the mounting seat. The first elastic member, the second elastic member, and the third elastic member are nitrogen springs.

[0014] As a further description of the above technical solution:

[0015] A positioning pin is arranged in the positioning groove, a slot corresponding to the positioning pin is arranged on the punch side protection seat, and a through hole corresponding to the positioning pin is arranged on the connecting material belt.

[0016] As a further description of the above technical solution:

[0017] The lower die base is provided with a first anti-side block on the side of the insert, and a lubrication plate is provided on the side of the first anti-side block facing the first anti-side block. The lower die base is provided with a second anti-side block on the side of the first punch and the second punch, and the lubrication plate is provided between the second anti-side block and the corresponding first punch or second punch.

[0018] As a further description of the above technical solution:

[0019] The lower die seat is provided with a side-preventing guide rail which is slidably connected to the side surface of the top block.

[0020] As a further description of the above technical solution:

[0021] The first punch is provided with a V-shaped pressing surface matching with its flanging end facing the side of the workpiece to be processed, and the first punch extends a primary forming notch at the end of the V-shaped pressing surface.

[0022] As a further description of the above technical solution:

[0023] The side surface of the second punch is provided with a secondary molding recess which matches the flanging end of the workpiece to be processed after the inner flanging, and the primary molding recess and the secondary molding recess match the corresponding surface of the third molding block.

[0024] As a further description of the above technical solution:

[0025] A V-shaped supporting surface having an obtuse angle corresponding to the V-shaped structure of the flanging end of the workpiece to be processed is disposed on the side surface of the third forming block.

[0026] As a further description of the above technical solution:

[0027] A plurality of support seats are arranged on the top of the lower die seat, and limiting legs corresponding to the support seats are arranged on the upper die seat.

[0028] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0029] The inner flanging forming die of the present invention can be applied to continuous die processing, and the forming quality of the workpiece is ensured by a two-stage flanging forming station. The mold is closed, and the forming punch assembly is plugged into the punch side protection seat to clamp and position the connecting material strip. The first forming block and the second forming block are positioned on one side of the top of the workpiece to be processed; the inserter moves synchronously with the upper die seat, and while the mold is closed, the top block is linked to make it laterally insert into the bottom of the workpiece to be processed and dock with the punch side protection seat to support the bottom; the pressing assembly is pressed and moves toward the upper die seat, so that the two punches are exposed, and the corresponding forming blocks are used to synchronously perform inner flanging and secondary forming on the workpiece to be processed. After the processing is completed, the upper die seat moves up, and the forming block and the punch are relatively displaced through the elastic cooperation between the upper die seat and the pressing assembly to realize the demolding of the top of the workpiece, the inserter moves up, and the top block drives the third forming block to reset, so that the side core pulling demolding of the workpiece is realized, and the punch side protection seat is elastically lifted, so that the workpiece is separated from the station, and the connecting material strip can be transported, realizing continuous die processing. The entire multi-station internal flanging forming process can achieve workpiece positioning, secondary forming processing, and workpiece demoulding and ejection operations only through opening and closing mold drive, thereby improving processing efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 The present invention is a structural schematic diagram of a side core pulling inner flanging forming mold which is easy to demould.

[0032] Figure 2 The present invention is a schematic structural diagram of a lower die seat, a punch side protection seat and a top block in a side core pulling inner flanging forming die which is easy to demould.

[0033] Figure 3 The present invention is an exploded view of a lower die seat, a punch side protection seat and a top block in a side core pulling inner flanging forming die which is easy to demould.

[0034] Figure 4 The present invention is a schematic structural diagram of an upper die seat, a forming punch assembly and a plunger in a side core-pulling inner flanging forming die that is easy to demould.

[0035] Figure 5 The present invention is a cross-sectional view of a side core pulling inner flanging forming mold for easy demoulding at the vertical plane where the longitudinal axis thereof is located.

[0036] Figure 6 The present invention is a cross-sectional view of a side core pulling inner flanging forming die for easy demoulding at the vertical plane where the longitudinal axis of the forming punch assembly is located.

[0037] Legend:

[0038] 1. Lower die seat; 11. First anti-side block; 12. Second anti-side block; 13. Lubricating plate; 14. Support seat; 2. Upper die seat; 21. Limiting leg; 3. Punch anti-side seat; 31. Mounting seat; 32. Slot; 33. First elastic member; 4. Press-on assembly; 41. Second elastic member; 5. Forming punch assembly; 51. Positioning groove; 52. First forming block; 53. First punch; 54. Second forming block; 55. Second punch; 56. Positioning pin; 6. Insert knife; 61. Wedge guide block; 7. Top block; 71. Third forming block; 72. Connecting block; 73. Third elastic member; 74. Anti-side guide rail; 100. Workpiece to be processed; 110. Connecting material strip. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Embodiment 1:

[0046] See also Figure 1-6 The present invention provides a technical solution: a side core-pulling inner flanging forming mold that is easy to demould, comprising:

[0047] Lower die base 1;

[0048] Upper die seat 2;

[0049] A punch side-preventing seat 3, which is elastically plugged into the middle of the lower die seat 1 through a mounting seat 31, and is used to support the connecting material strip 110 between the workpieces 100 to be processed;

[0050] A pressing component 4, which is elastically slidably arranged at the bottom of the upper mold base 2;

[0051] The forming punch assembly 5 has a positioning groove 51 at the bottom thereof and is plugged into the punch side protection seat 3, and includes a first forming block 52 and a second forming block 54 positioned on the bottom surface of the pressing assembly 4, and a first punch 53 and a second punch 55 that are inserted through the pressing assembly 4 and positioned on the upper die seat 2;

[0052] The inserting knife 6 is positioned at the bottom of the upper die seat 2, and a wedge-shaped guide block 61 is provided at the bottom;

[0053] The top block 7 is elastically slidably arranged on the lower die seat 1 along the punch anti-side seat 3, a wedge surface corresponding to the wedge guide block 61 is arranged on the outer side, and a third forming block 71 is arranged on the inner side. The third forming block 71 is inserted into the workpiece 100 to be processed which is bent into a U shape. The first forming block 52 and the first punch 53 form an inner flanging station, and the second forming block 54 and the second punch 55 form a secondary forming station.

[0054] The inner flanging forming die of the present invention can be applied to continuous die processing, and the forming quality of the workpiece is ensured by a two-stage flanging forming station. The mold is closed, and the forming punch assembly is plugged into the punch side protection seat to clamp and position the connecting material strip. The first forming block and the second forming block are positioned on one side of the top of the workpiece to be processed; the inserter moves synchronously with the upper die seat, and while the mold is closed, the top block is linked to make it laterally insert into the bottom of the workpiece to be processed and dock with the punch side protection seat to support the bottom; the pressing assembly is pressed and moves toward the upper die seat, so that the two punches are exposed, and the corresponding forming blocks are used to synchronously perform inner flanging and secondary forming on the workpiece to be processed. After the processing is completed, the upper die seat moves up, and the forming block and the punch are relatively displaced through the elastic cooperation between the upper die seat and the pressing assembly to realize the demolding of the top of the workpiece, the inserter moves up, and the top block drives the third forming block to reset, so that the side core pulling demolding of the workpiece is realized, and the punch side protection seat is elastically lifted, so that the workpiece is separated from the station, and the connecting material strip can be transported, realizing continuous die processing. The entire multi-station internal flanging forming process can achieve workpiece positioning, secondary forming processing, and workpiece demoulding and ejection operations only through opening and closing mold drive, thereby improving processing efficiency and quality.

[0055] A positioning pin 56 is arranged in the positioning groove 51, a slot 32 corresponding to the positioning pin 56 is arranged on the punch anti-side seat 3, and a through hole corresponding to the positioning pin 56 is arranged on the connecting material strip 110, so as to further improve the clamping and positioning stability of the continuous material strip 110 on the punch anti-side seat 3 and the forming punch assembly 5.

[0056] The lower die base 1 is provided with an anti-side guide rail 74 slidably connected to the side of the top block 7, so as to improve the stability of the lateral sliding of the top block 7 under the guidance of the wedge surface and the elastic preload, and ensure the accuracy of the docking between the third forming block 71 and the workpiece.

[0057] The first punch 53 is provided with a V-shaped pressing surface matching its flanged end toward one side of the workpiece 100 to be processed, and a primary forming notch extends from the end of the V-shaped pressing surface of the first punch 53. The workpiece 100 to be processed is initially bent by the V-shaped pressing surface, and the primary forming notch forms a negative angle structure for its inner flange.

[0058] A secondary molding recess matching the flanging end of the workpiece 100 to be processed after the inner flanging is disposed on the side surface of the second punch 55 , and the primary molding recess and the secondary molding recess match the corresponding surface of the third molding block 71 .

[0059] The side surface of the third forming block 71 is provided with a V-shaped supporting surface with an obtuse angle corresponding to the V-shaped structure of the flanging end of the workpiece 100 to be processed, so as to ensure the quality of the inner flanging of the workpiece through secondary stamping.

[0060] A plurality of support seats 14 are arranged on the top of the lower die seat 1, and a limiting support foot 21 corresponding to the support seat 14 is arranged on the upper die seat 2 to limit the moving range and stroke of the upper and lower die seats. When the upper sensor is pressurized, the mold closing drive is terminated to avoid overpressure on the workpiece and the mold, which affects the molding quality and the service life of the mold.

[0061] The working principle of a side-pulling inner flanging forming mold that is easy to demold in this embodiment includes: the mold is closed, the positioning groove 51 of the forming punch assembly 5 is plugged into the punch anti-side seat 3, the positioning pin 56 passes through the workpiece through hole and is plugged into the slot 31, the connecting material strip 110 is clamped and positioned, and the first forming block 52 and the second forming block 54 position the top side of the workpiece 100 to be processed; the inserting knife 6 moves synchronously with the upper die seat 2, and while closing the mold, the top block 7 is linked to make it laterally inserted into the bottom of the workpiece 100 to be processed and dock with the punch anti-side seat 3 to support the bottom; the pressing assembly 4 is pressed and moved toward the upper die seat 2, so that the two punches are exposed, and the corresponding forming blocks are cooperated to perform synchronous inner flanging and secondary molding of the workpiece 100 to be processed. After the processing is completed, the upper die seat 2 moves up, and the forming block and the punch are relatively displaced through the elastic cooperation between the upper die seat 2 and the pressing assembly 4 to realize the demoulding of the top of the workpiece, and the insert cutter 6 moves up, and the top block 7 drives the third forming block 71 to reset, so that the side core pulling and demoulding of the workpiece are realized, and the punch anti-side seat 3 is elastically lifted, so that the workpiece is separated from the work station, and the connecting material belt 110 can be transported to realize continuous die processing.

[0062] Embodiment 2:

[0063] On the basis of the above-mentioned embodiment 1, preferably, the first elastic member 33, the second elastic member 41, and the third elastic member 73 are respectively arranged between the bottom of the punch side protection seat 3 and the lower die seat 1, the pressing assembly 4 and the upper die seat 2, and the connecting block 72 at the bottom of the top block 7 and the mounting seat 31, and the first elastic member 33, the second elastic member 41, and the third elastic member 73 are nitrogen springs. The above-mentioned design can increase the service life of the elastic component compared with the common spring.

[0064] Embodiment three:

[0065] On the basis of the above-mentioned embodiment 1, preferably, the lower die base 1 is provided with a first anti-side block 11 on the side of the insert cutter 6, and a lubricating plate 13 is provided on the side of the first anti-side block 11 facing the first anti-side block 11, and the lower die base 1 is provided with a second anti-side block 12 on the side of the first punch 53 and the second punch 55, and the lubricating plate 13 is provided between the second anti-side block 12 and the corresponding first punch 53 or second punch 55, so as to reduce the stamping resistance of the punch and the insert cutter and improve the movement stability of the mold structure.

[0066] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A side core pulling inner flanging forming mold which is easy to demould, characterized in that: include: Lower die seat; Upper die seat; A punch side-prevention seat, which is elastically plugged into the middle of the lower die seat through a mounting seat, and is used to support the connecting strip between the workpieces to be processed; A pressing assembly, which is elastically slidably arranged at the bottom of the upper die seat; A forming punch assembly, the bottom of which is provided with a positioning groove corresponding to the punch side-preventing seat, comprising a first forming block and a second forming block positioned on the bottom surface of the pressing assembly, and a first punch and a second punch penetrating the pressing assembly and positioned on the upper die seat; A plunger, which is positioned at the bottom of the upper die seat and has a wedge-shaped guide block at the bottom; The top block is elastically slidably arranged on the lower die seat along the side of the punch anti-side seat, a wedge surface corresponding to the wedge guide block is arranged on the outer side, and a third forming block is arranged on the inner side. The third forming block is inserted into the workpiece to be processed which is bent into a U shape. The first forming block and the first punch form an inner flanging station, and the second forming block and the second punch form a secondary forming station.

2. A side core pulling inner flanging forming die that is easy to demould according to claim 1, characterized in that: A first elastic member, a second elastic member, and a third elastic member are respectively arranged between the bottom of the punch side protection seat and the lower die seat, the press-attachment assembly and the upper die seat, and the connecting block at the bottom of the top block and the mounting seat. The first elastic member, the second elastic member, and the third elastic member are nitrogen springs.

3. The side core pulling inner flanging forming mold which is easy to demould according to claim 1, characterized in that: A positioning pin is arranged in the positioning groove, a slot corresponding to the positioning pin is arranged on the punch side protection seat, and a through hole corresponding to the positioning pin is arranged on the connecting material belt.

4. The side core pulling inner flanging forming mold which is easy to demould according to claim 1 is characterized in that: The lower die base is provided with a first anti-side block on the side of the insert, and a lubrication plate is provided on the side of the first anti-side block facing the first anti-side block. The lower die base is provided with a second anti-side block on the side of the first punch and the second punch, and the lubrication plate is provided between the second anti-side block and the corresponding first punch or second punch.

5. The side core pulling inner flanging forming mold which is easy to demould according to claim 1, characterized in that: The lower die seat is provided with a side-preventing guide rail which is slidably connected to the side surface of the top block.

6. The side core pulling inner flanging forming mold which is easy to demould according to claim 1, characterized in that: The first punch is provided with a V-shaped pressing surface matching with its flanging end facing the side of the workpiece to be processed, and the first punch extends a primary forming notch at the end of the V-shaped pressing surface.

7. A side core pulling inner flanging forming die for easy demoulding according to claim 6, characterized in that: The side surface of the second punch is provided with a secondary molding recess which matches the flanging end of the workpiece to be processed after the inner flanging, and the primary molding recess and the secondary molding recess match the corresponding surface of the third molding block.

8. The side core pulling inner flanging forming mold which is easy to demould according to claim 1, characterized in that: A V-shaped supporting surface having an obtuse angle corresponding to the V-shaped structure of the flanging end of the workpiece to be processed is disposed on the side surface of the third forming block.

9. The side core pulling inner flanging forming mold which is easy to demould according to claim 1, characterized in that: A plurality of support seats are arranged on the top of the lower die seat, and limiting legs corresponding to the support seats are arranged on the upper die seat.

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