CN216655927U - Novel bending structure - Google Patents

Abstract

The utility model discloses a novel bending structure, which comprises an upper die part and a lower die part, wherein the upper die part is arranged on an upper die holder of a punch press, the lower die part is arranged on a lower die holder of the punch press, and a material belt is positioned between the upper die part and the lower die part; the lower die part comprises a coil guide positive male die, and the material belt is sleeved on the coil guide positive male die to perform position guide in the punching process of the punch; the lower die holder on be equipped with the coil and lead the shaping position that positive terrace die position corresponds, last mould part including coil die, coil terrace die, ejector pin, coil guide rail, locate this shaping position department, still be equipped with the slotting tool in the lower die part, the slotting tool drive coil die draw close to the center of shaping position from the outside, ejector pin drive coil terrace die be close to along coil guide rail towards coil die, the material area locate between coil die and the coil terrace die, realize the shaping effect to the material area. The utility model can realize the in-mold coil winding process on the side micro structure of the product, and has reliable working stroke, good product forming effect and high production efficiency in an automatic production mode.

Description

Novel bending structure

Technical Field

The utility model relates to the field of stamping and forming, in particular to a novel bending structure.

Background

The company has a product which is a backstop bushing used on a pistol drill, a product material 65Mn is electroplated after heat treatment to obtain a finished product, and the product is a rotating piece, so the requirements on the inner diameter and the roundness are high; product top adopts the technology of bending, and the edge rolling part is the shell fragment, has strict requirement to fatigue strength, and the product is applyed 20N's moment of torsion and is carried out rotatory fatigue test repeatedly, and power can directly be used to edge rolling department, requires that the rotatory fatigue number of times can not lead to the fact edge rolling department fracture more than 10000 at least. This is a major challenge in the industry, both for the product mold forming process and for the product heat treatment, and all bad influences should be avoided as much as possible. Therefore, a proper half-round wrapping process is required to be adopted in the product mold forming process, and the influence on the use function caused by the processing hardening of the product possibly caused by the repeated forming action must be avoided. The original process adopts multi-engineering mould forming and machining, is extremely unstable, has low productivity, and causes excessive complaints received after circulation in the market. In the face of increasing order demand, customers urgently need excellent suppliers to solve the above difficulties, so a new production method is urgently needed to be developed to improve the stability of product quality and the production efficiency of products.

Disclosure of Invention

In order to solve the above problems, the present invention provides a novel bending structure.

The technical scheme of the utility model is as follows: a novel bending structure comprises an upper die part and a lower die part, wherein the upper die part is arranged on an upper die base of a punch press, the lower die part is arranged on a lower die base of the punch press, and a material belt is positioned between the upper die part and the lower die part; the lower die part comprises a coil guide positive male die, and the material belt is sleeved on the coil guide positive male die to perform position guide in the punching process of the punch; the lower die holder on be equipped with the coil and lead the shaping position that positive terrace die position corresponds, last mould part including coil die, coil terrace die, ejector pin, coil guide rail, locate this shaping position department, still be equipped with the slotting tool in the lower die part, the slotting tool drive coil die draw close to the center of shaping position from the outside, ejector pin drive coil terrace die be close to along coil guide rail towards coil die, the material area locate between coil die and the coil terrace die, realize the shaping effect to the material area.

Preferably, the lower die base is sequentially provided with a lower backing plate, a lower die plate and a lower stripper plate from bottom to top, the lower die plate and the lower backing plate are fixed on the lower die base, equal-height sleeves are arranged between the lower stripper plate and the lower backing plate, a reset spring is arranged between the lower stripper plate and the lower die base, the coil guide male die is arranged on the lower die plate, when the upper die moves downwards, the reset spring can be downwards extruded by the stress on the upper stripper plate, the coil guide male die upwards stretches out of the lower stripper plate, and the lower stripper plate can be upwards reset by driving the reset spring under the action of the stress.

Preferably, the lower template is provided with a limiting column for limiting the downward limit of the anti-falling plate.

Preferably, an upper base plate, an upper clamping plate and a stop plate are sequentially arranged below the upper die base from top to bottom, the upper base plate and the upper clamping plate are fixed on the upper die base, a guide pillar and an equal-height limiting block are arranged between the stop plate and the upper base plate, a nitrogen spring is arranged between the stop plate and the upper die base, the nitrogen spring can be upwards extruded when the force is applied to the lower part of the stop plate, and the nitrogen spring can drive the stop plate to downwards reset when the force is removed; the coil female die, the coil male die, the ejector rod and the coil guide rail are connected in a matched mode and are arranged in a forming position above the coil guide male die.

Preferably, the coil guide rail is fixed on the lower surface of the upper backing plate and is opposite to the coil guide positive male die below, two guide rail grooves are respectively arranged on two sides of the periphery of the coil guide rail, the coil male dies are arranged on two sides of the periphery of the coil guide rail, and the tail ends of the coil male dies are positioned in the guide rail grooves of the coil guide rail and can slide along the guide rail grooves; the coil female die is arranged below the stop plate and positioned outside the coil male die, and the coil male die can be close to or far away from the coil female die along the guide rail groove.

Preferably, the rolling female dies are respectively arranged on the front side and the rear side of the rolling guide rail, a return spring is arranged on the outer side of the rolling female dies, a wedge-shaped slope is arranged at the outer end of the rolling female dies, a slotting tool is arranged on the lower die base corresponding to the wedge-shaped slope, and when the upper die moves downwards and the slotting tool is inserted into the wedge-shaped slope, the two rolling female dies are relatively close to each other; the upper end of the coiling male die is provided with a mandril, the upper end of the mandril is provided with a return spring, when the upper die moves downwards, the mandril can push the coiling male die to slide along a guide rail groove of the coiling guide rail, the coiling male die is guided and moved to the coiling female die on one side close to the guide rail groove, and the coiling female die and the coiling male die clamp a workpiece on a material belt to realize a coiling forming process.

Still further preferably, the lower surface of the stop plate is provided with a limiting guide rail, and the limiting guide rail clamps the coil female die and limits the moving direction of the coil female die.

Still further preferably, the lower surface of the stop plate is further provided with a material pressing block, and the material pressing block is arranged on two sides of the forming position.

Preferably, the lower end of the guide post is provided with a limit block.

The utility model has the beneficial effects that: 1. the utility model adopts the scheme that the coil female die and the coil male die respectively reach the designated positions by utilizing the limiting devices according to the descending time sequence of the upper die, and the workpieces are clamped and formed. The up-and-down motion of the upper die part is changed into horizontal motion by utilizing the wedge-shaped slope structures at the tail ends of the slotting tool and the coil female die, the slotting tool is embedded into the wedge-shaped slope, the breaking caused by unbalance loading generated by bending can be prevented, and the requirements on strength and stability are met in a small space.

2. By adopting the mode, the production quality of the product is guaranteed, the continuous processing of the material belt can be realized, and the processing stability and the production efficiency are greatly improved.

Drawings

Fig. 1 is a schematic view of the structure of the present invention as viewed from the front side.

Fig. 2 is a schematic view of the structure of the present invention as viewed from the left side.

Fig. 3 is a schematic bottom view of the present invention.

Fig. 4 is an enlarged schematic view of a.

Fig. 5 is a part processing position indicating view of the present invention.

Fig. 6 is a schematic view of the present invention, as viewed from the front side.

Fig. 7 is a schematic view of the present invention, as seen from the left side.

Figure 8 is a top view of the coil guide of the present invention.

Figure 9 is a front view of the coiling male die of the present invention.

Figure 10 is a top view of the coiling male die of the present invention.

Description of reference numerals:

1: an upper die holder; 2: a nitrogen spring; 3: an upper base plate; 4: an upper splint; 5: a stopper plate; 6: an upper cover plate; 7: a return spring; 8: a top rod; 9: winding the guide rail; 10: a coiling male die; 11: pressing blocks; 12: a guide post; 13: a molding position; 14: a material belt; 15: removing the plate; 16: equal-height sleeve: 17: a lower template; 18: a lower base plate; 19; a lower die holder; 20: a coil guide male die; 21: a limiting column; 22: coiling a female die; 23: inserting a cutter; 24: limiting a guide rail; 25: equal-height limiting blocks; 26: and a limiting block.

Detailed Description

The utility model is further explained below with reference to the drawings and examples.

As shown in fig. 1-4, the present invention comprises an upper mold part and a lower mold part, wherein the upper mold part is arranged on an upper mold base 1 of a punch press, the lower mold part is arranged on a lower mold base 19 of the punch press, and a material belt 14 is arranged between the upper mold part and the lower mold part; the lower die part comprises a coil guide positive male die 20, and the material belt 14 is sleeved on the coil guide positive male die 20 for position guide in the punching process of the punch press; the lower die holder 19 on be equipped with the coil and lead the shaping position 13 that positive terrace die 20 position corresponds, last mould part include coil die 22, coil terrace die 10, ejector pin 8, coil guide rail 9, locate this shaping position 13 department, still be equipped with slotting tool 23 in the lower die part, slotting tool 23 drive coil die 22 draw close to from the outside to the center of shaping position 13, ejector pin 8 drive coil terrace die 10 be close to towards coil die 22 along coil guide rail 9, material area 14 locate between coil die 22 and the coil terrace die 10, realize the shaping effect to material area 14.

In this embodiment, a lower backing plate 18, a lower backing plate 17 and a lower stripper plate 15 are sequentially arranged above the lower die holder 19 from bottom to top, the lower backing plate 17 and the lower backing plate 18 are fixed on the lower die holder 19, an equal-height sleeve 16 is arranged between the lower stripper plate 15 and the lower backing plate 18, the equal-height sleeve 16 is used for limiting the distance between the lower backing plate 18 and the lower stripper plate 15, a return spring 7 is arranged between the lower stripper plate 15 and the lower die holder 19, a coil guide male die 20 is arranged on the lower backing plate 17, when an upper die moves downwards, the reset spring 7 can be downwardly extruded by the force exerted on the upper stripper plate 15, the coil guide male die 20 extends upwards out of the lower stripper plate 15, and the force-relieved return spring 7 can drive the lower stripper plate 15 to upwardly reset.

In this embodiment, the lower template 17 is provided with a limiting column 21 for limiting the downward limit of the lower stripper plate 15.

In the embodiment, an upper base plate 3, an upper clamp plate 4 and a stop plate 5 are sequentially arranged below an upper die holder 1 from top to bottom, the upper base plate 3 and the upper clamp plate 4 are fixed on the upper die holder 1, a guide pillar 12 and an equal-height limiting block 25 are arranged between the stop plate 5 and the upper base plate 3, the equal-height limiting block 25 is used for limiting the distance between the stop plate 5 and the upper base plate 3, a nitrogen spring 2 is arranged between the stop plate 5 and the upper die holder 1, the nitrogen spring 2 can be upwards extruded by the force below the stop plate 5, and the stop plate 5 can be driven to downwards reset by the withdrawal of the force-bearing nitrogen spring 2; the coil female die 22, the coil male die 10, the ejector rod 8 and the coil guide rail 9 are connected in a matched manner, and are arranged in the forming position 13 above the coil guide male die 20.

In the embodiment, the coil guide rail 9 is fixed on the lower surface of the upper backing plate 3 and faces the coil guide positive male die 20 below, two guide rail grooves are respectively arranged on two sides of the periphery of the coil guide rail 9, the coil male dies 10 are arranged on two sides of the periphery of the coil guide rail 9, and the tail ends of the coil male dies are positioned in the guide rail grooves of the coil guide rail 9 and can slide along the guide rail grooves; the coil female die 22 is arranged below the stop plate 5 and positioned outside the coil male die 10, and the coil male die 10 can be close to or far away from the coil female die 22 along the guide rail groove. Fig. 6-8 are three views of a coil guide.

In the embodiment, the coil female dies 22 are respectively arranged at the front side and the rear side of the coil guide rail 9, the reset spring 7 is arranged at the outer side of the coil female dies 22, the wedge-shaped slope is arranged at the outer end of the coil female dies 22, the slotting tool 23 is arranged on the lower die base 19 corresponding to the wedge-shaped slope, and when the upper die moves downwards and the slotting tool 23 is inserted into the wedge-shaped slope, the two coil female dies 22 are relatively close to each other; the upper ends of the coiling male dies 10 are respectively provided with a mandril 8, the upper ends of the mandrils 8 are provided with a return spring 7, when the upper die moves downwards, the mandrils 8 can push the coiling male dies 10 to slide along the guide rail groove of the coiling guide rail 9, the coiling male dies 10 are guided by the guide rail groove to move to the coiling female dies 22 on one side close to the coiling male dies, and the coiling female dies 22 and the coiling male dies 10 clamp workpieces on the material belt 14 to realize a coiling forming process. The arrangement of the mandril 8 and the coiling guide rail 9 changes the up-and-down movement of the upper die into the approach of the coiling convex die 10 to the coiling concave die 22, thereby realizing the extrusion molding of the part to be processed of the workpiece on the material belt 14 between the coiling concave die 22 and the coiling convex die 10. Fig. 9-10 are front and top views, respectively, of a coiling male die.

In this embodiment, the lower surface of the stop plate 5 is provided with a limiting guide rail 24, and the limiting guide rail 24 clamps the coil concave die 22 to limit the moving direction of the coil concave die 22.

In this embodiment, the lower surface of the stopper plate 5 is further provided with a material pressing block 11, and the material pressing block 11 is disposed on two sides of the forming position 13.

In this embodiment, the lower end of the guide pillar 12 is provided with a limiting block 26.

The working principle of the utility model is as follows: fig. 5 is a plan view of a machining position indicating diagram of the component. The three stations on the material tape 14 are sequentially represented from left to right as a schematic diagram of a workpiece in an uncoiled state, a first coiling state and a second coiling state, and arrows in the diagram indicate processing positions on parts. The structure of the utility model is the mould for processing the first coil of the part. When the device works, the material belt 14 is positioned between the upper die part and the lower die part, the upper die moves downwards, the material pressing blocks 11 positioned on two sides of the forming position 13 contact the material belt 14 firstly, meanwhile, the limiting blocks 26 positioned at the lower end of the guide pillar 12 contact the lower stripper plate 15, and the lower stripper plate 15 is pressed downwards under the action of the nitrogen spring 2; the upper die continues to descend, the workpiece on the material belt 14 is pressed into the coil guide male die 20 by the material pressing block 11, and the positioning work of the workpiece to be processed is realized; the upper die continues to descend, when the lower stripper plate 15 contacts the limiting column 21 fixed on the lower die plate 17, the lower stripper plate 15 stops descending, meanwhile, the slotting tool 23 is inserted into the wedge-shaped slope at the tail end of the winding female die 22, and the two winding female dies 22 are close to the center of the forming position 13 under the action of the slotting tool 23 and reach preset positions; the upper die continues to move downwards, the stop plate 5 stops moving downwards, the coiling convex die 10 starts to contact with the coiling guide convex die 20 below, the ejector rod 8 is arranged above the coiling convex die 10, the coiling convex die 10 pushes the coiling convex die 10 downwards under the action of the ejector rod 8, meanwhile, the coiling convex die 10 starts to move outwards under the action of the guide rail groove on the coiling guide rail 9 and approaches the coiling concave die 22 which reaches a preset position, the position to be processed of the workpiece on the material strip 14 is located between the coiling concave die 22 and the coiling convex die 10, when the upper die continues moving downwards, the die reaches a bottom dead center, the coiling convex die 10 reaches a specified position and is matched with the coiling concave die 22 to complete the bending work of the part to be processed of the workpiece. The mould moves upwards, the coiling convex mould 10 resets under the action of the reset spring 7, and the stop plate 5 resets under the action of the nitrogen spring 2; the mould continues to move upwards, the material belt 14 is separated from the coil guide positive male die 20 under the action of the lower stripping plate 15 and the return spring 7, and the coil female die 22 returns to the original position under the action of the return spring 7; and when the die reaches the top dead center, the feeder feeds materials, and one-time processing is completed.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in 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 orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "connected" and the like are to be construed broadly, e.g., as meaning fixedly attached, detachably attached, or integrally formed; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. A novel bending structure is characterized by comprising an upper die part and a lower die part, wherein the upper die part is arranged on an upper die holder (1) of a punch press, the lower die part is arranged on a lower die holder (19) of the punch press, and a material belt (14) is positioned between the upper die part and the lower die part; the lower die part comprises a coil guide positive male die (20), and the material belt (14) is sleeved on the coil guide positive male die (20) for position guide in the punching process of the punch press; the forming die is characterized in that a forming position (13) corresponding to a coil straightening male die (20) is arranged on a lower die holder (19), an upper die part comprises a coil female die (22), a coil male die (10), an ejector rod (8) and a coil guide rail (9), the forming position (13) is arranged, an inserting cutter (23) is further arranged in the lower die part, the inserting cutter (23) drives the coil female die (22) to be drawn close to the center of the forming position (13) from the outer side, the ejector rod (8) drives the coil male die (10) to be close to the coil female die (22) along the coil guide rail (9), and a material belt (14) is arranged between the coil female die (22) and the coil male die (10) to realize the forming effect on the material belt (14).

2. The novel bending structure according to claim 1, wherein a lower backing plate (18), a lower template (17) and a lower stripper plate (15) are sequentially arranged above the lower die base (19) from bottom to top, the lower template (17) and the lower backing plate (18) are fixed on the lower die seat (19), an equal-height sleeve (16) is arranged between the lower stripper plate (15) and the lower backing plate (18), a return spring (7) is arranged between the lower stripper plate (15) and the lower die holder (19), the coil guide positive punch (20) is arranged on the lower template (17), when the upper die moves downwards, the upper part of the lower stripper plate (15) is stressed to extrude the return spring (7) downwards, the coil guide male die (20) extends upwards out of the lower stripping plate (15), and the lower stripping plate (15) can be driven to reset upwards by removing the stressed reset spring (7).

3. A novel bending structure according to claim 2, wherein the lower template (17) is provided with a limiting column (21).

4. The novel bending structure according to claim 1, wherein an upper base plate (3), an upper clamp plate (4) and a stop plate (5) are sequentially arranged below the upper die holder (1) from top to bottom, the upper base plate (3) and the upper clamp plate (4) are fixed on the upper die holder (1), a guide pillar (12) and an equal-height limiting block (25) are arranged between the stop plate (5) and the upper base plate (3), a nitrogen spring (2) is arranged between the stop plate (5) and the upper die holder (1), the nitrogen spring (2) can be upwards extruded under the lower stress of the stop plate (5), and the nitrogen spring (2) can drive the stop plate (5) to downwards reset after the stress is removed; the coil female die (22), the coil male die (10), the ejector rod (8) and the coil guide rail (9) are connected in a matched mode, and are arranged in a forming position (13) above the coil guide male die (20).

5. A novel bending structure according to claim 4, wherein the coil guide rail (9) is fixed on the lower surface of the upper backing plate (3) and faces the coil guide positive punch (20) below, two guide grooves are respectively formed in two sides of the periphery of the coil guide rail (9), the coil punches (10) are arranged on two sides of the periphery of the coil guide rail (9), and the tail ends of the coil punches are positioned in the guide grooves of the coil guide rail (9) and can slide along the guide grooves; coil and enclose die (22) locate the below of backstop board (5), and be located the outside of coil and enclose terrace die (10), coil and enclose terrace die (10) can be close to or keep away from along the guide rail groove coil and enclose die (22).

6. A novel bending structure according to claim 5, wherein the coiling female dies (22) are respectively arranged on the front side and the rear side of the coiling guide rail (9), the outer sides of the coiling female dies (22) are provided with return springs (7), the outer ends of the coiling female dies (22) are provided with wedge-shaped slopes, the lower die base (19) is provided with slotting tools (23) corresponding to the wedge-shaped slopes, and when the upper die moves downwards and the slotting tools (23) are inserted into the wedge-shaped slopes, the two coiling female dies (22) are relatively close together; the upper end of the coil terrace die (10) is provided with a mandril (8) respectively, the upper end of the mandril (8) is provided with a reset spring (7), the mandril (8) can push the coil terrace die (10) to slide along a guide rail groove of the coil guide rail (9), the coil terrace die (10) is guided and moved to a coil concave die (22) on one side close to the guide rail groove, and the coil concave die (22) and the coil terrace die (10) clamp a workpiece on a material belt (14) to realize a coil forming process.

7. A novel bending structure according to claim 6, wherein the lower surface of the stop plate (5) is provided with a limiting guide rail (24), and the limiting guide rail (24) clamps the coiling female die (22) and limits the moving direction of the coiling female die (22).

8. A novel bending structure according to claim 6, wherein the lower surface of the stop plate (5) is further provided with a swaging block (11), and the swaging block (11) is arranged at two sides of the forming position (13).

9. A novel bending structure according to claim 4, wherein the lower end of the guide post is provided with a stopper (26).

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