CN218475876U - Hollow pedal arm stamping forming die - Google Patents

Abstract

The utility model discloses a hollow pedal arm stamping forming die, including last terrace die and lower die, its characterized in that: the upper male die comprises an upper pressure head, and a floating upper limiting component is arranged on the forming surface of the upper pressure head; the lower female die comprises a lower die plate, female die blocks are arranged on the lower die plate, floating lower limiting assemblies and guide roller assemblies are arranged in forming cavities of the female die blocks, and positioning assemblies are arranged on the top surfaces of the female die blocks and used for positioning workpieces to be formed; when the device works, the floating upper limit component and the floating upper limit component are used for performing floating limit on the bending part of the workpiece, and the guide roller component is used for supporting the workpiece; the bending part of the workpiece is bent in a floating state, and the bending part is not stressed, so that the problem that the bending part of the hollow workpiece is stressed is solved, the technical requirement that the hollow workpiece needs a filler is eliminated, the working efficiency is improved, and the production cost is reduced.

Description

Hollow pedal arm stamping forming die

Technical Field

The utility model belongs to the stamping die field, especially, hollow pedal arm stamping forming die.

Background

The forming die is one of the most important die types in the field of cold stamping dies, and the forming feasibility is the important factor of the forming die. If a set of forming die can not complete the shape stabilization of the part and eliminate the problems of cracking, wrinkling, springback and the like, the method can be definitely said. The design of this set of forming dies is very frustrating.

The design structure of a general forming die is as follows: the bending forming die comprises a male die block, a female die block and a material pressing device, and the structure belongs to a conventional bending forming die. If the part being formed is hollow and does not allow for packing of filler (e.g., fluid media such as sand) within the part, the part cannot withstand the mode of forming after pre-swaging by the swager. After the hollow workpiece is not filled with filler, the workpiece is bent by adopting the existing die, and the force borne by the upper surface of the hollow workpiece cannot be transmitted to the lower surface of the hollow workpiece, so that the bending failure is caused; namely, the bending part of the workpiece is in a shriveled shape and has a non-hollow structure.

Disclosure of Invention

The utility model provides a hollow pedal arm stamping forming die, the purpose is in order to solve the problem that hollow pedal arm can't take shape on the stamping die.

In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a hollow pedal arm stamping forming die, includes punch and lower die, its characterized in that: the upper male die comprises an upper pressure head, and a floating upper limiting assembly and a pressure dividing block assembly are arranged on the forming surface of the upper pressure head; the floating upper limit component comprises an upper nitrogen spring and a prior pressing block, an upper central hole is formed in the upper pressing head, the upper nitrogen spring and the prior pressing block are positioned in the upper central hole, the upper nitrogen spring is used for driving the prior pressing block, the forming surface of the prior pressing block is flush with the forming surface of the upper pressing head, and the prior pressing block is used for limiting a workpiece; the pressure dividing block assembly is fixed on the forming surface of the upper pressure head and used for pushing the floating lower limiting assembly; the lower female die comprises a lower die plate, a female die block is arranged on the lower die plate, a floating lower limiting assembly and a guide roller assembly are arranged in a forming cavity of the female die block, the guide roller assembly is used for supporting a workpiece, and a positioning assembly is arranged on the top surface of the female die block and used for positioning the workpiece to be formed; the floating lower limiting component comprises a lower nitrogen spring and a lower limiting block, a lower central hole is formed in the female die block, the lower nitrogen spring and the lower limiting block are located in the lower central hole, the lower nitrogen spring is used for driving the lower limiting block, the lower limiting block can limit a workpiece in the vertical direction in cooperation with the preceding pressing block, and the lower limiting block moves downwards through the lower limiting block component.

The technical scheme is further limited, a limit groove is arranged on the supporting surface of the lower limit block, the forming surface of the advanced pressing block can extend into the limit groove, and the groove wall of the limit groove is in contact fit with the pressing dividing block.

Further inject above-mentioned technical scheme, guide roller subassembly comprises two sets of deflector rolls, and the deflector roll comprises pivot and barrel constitution monolithic structure, and the pivot is connected with the shaft hole gyration on the die piecemeal, is equipped with the stopper on the lower bolster, and the stopper is used for the pivot spacing.

The technical scheme is further limited, the cylinder body is a rectangular body, and the edge on the outer surface of the cylinder body is arc-shaped.

The technical scheme is further limited, the positioning assembly consists of positioning blocks and positioning pins, and the positioning blocks and the positioning pins are uniformly distributed on the top surfaces of the female die blocks.

The utility model discloses beneficial effect: 1) The bending part of the workpiece is bent in a floating state, and the bending part is not stressed, so that the problem that the bending part of the hollow workpiece is stressed is solved, the technical requirement that the hollow workpiece needs fillers is eliminated, the working efficiency is improved, the production cost is reduced, and the lightweight is facilitated; 2) In the forming process of the hollow workpiece, the surface of the non-bending part is abraded after the non-bending part is stressed and slides, the surface damage can be avoided by adopting the guide roller, and the quality of a product is ensured.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the structure of the upper male die in fig. 1.

Fig. 3 is a schematic view of the lower female mold of fig. 1.

Fig. 4 is a shape diagram of the present invention.

Detailed Description

As shown in fig. 1, 2 and 3, the stamping forming die for the hollow pedal arm comprises an upper male die 1 and a lower female die 2, wherein the upper male die comprises an upper pressing head 11, and a floating upper limiting component 12 and a pressure dividing block 123 are arranged on a forming surface of the upper pressing head;

as shown in fig. 1 and 2, the floating upper limiting component 12 includes an upper nitrogen spring 121 and a first pressing block 122, the upper pressing head can be connected with the working end of the punching device, an upper center hole is formed in the upper pressing head, the upper nitrogen spring is fixed in the center hole, a push rod of the upper nitrogen spring is fixedly connected with the first pressing block, the upper nitrogen spring is used for driving the first pressing block, the first pressing block is in sliding fit with the upper center hole, the first pressing block is flush with the forming surface of the upper pressing head, and the first pressing block is used for limiting the workpiece; the pressure dividing block assembly is fixed on the forming surface of the upper pressure head through a screw, and is used for pushing the floating lower limiting assembly; the advantages are that: the structure is simple, the manufacturing cost is low, and the maintenance and the debugging are convenient; the forming surfaces of the pressing block and the upper pressing head are flush, so that the quality of the bending part of the workpiece is ensured; the pressure dividing block assembly is used for enabling the upper pressure head to compress the hollow workpiece, so that the floating lower limiting assembly moves along with the floating upper limiting assembly;

as shown in fig. 1, 2 and 3, the lower die 2 includes a lower template 21, a die block 22 is provided on the lower template, a floating lower limiting component 23 and a guide roller component 24 are provided in a forming cavity of the die block, the guide roller component is used for supporting a workpiece, a positioning component 25 is provided on the top surface of the die block, and the positioning component is used for positioning the workpiece;

as shown in fig. 1 and 3, the floating lower limiting assembly 23 includes a lower nitrogen spring 231 and a lower limiting block 232, a lower central hole is formed in the female die block, the lower nitrogen spring is fixed in the lower central hole, a push rod of the lower nitrogen spring is fixedly connected with the lower limiting block, the upper nitrogen spring is used for driving the lower limiting block, the lower limiting block is in sliding fit with the lower central hole, the lower limiting block is matched with the advanced press block to limit the workpiece in the up-and-down direction, and the lower limiting block moves downwards through the pressure block assembly; the advantages are that: the structure is simple, the manufacturing cost is low, and the maintenance and the debugging are convenient;

as shown in fig. 3 and 4, a limiting groove 2321 is formed in the supporting surface of the lower limiting block 232, the forming surface of the advanced pressing block can extend into the limiting groove, and the groove wall of the limiting groove is in contact fit with the pressure dividing block; the advantages are that: the structure is simple, the manufacturing cost is low, the maintenance and the debugging are convenient, and the displacement of the workpiece in the front and back directions is limited;

as shown in fig. 3 and 4, the guide roller assembly 24 is composed of two sets of guide rollers, each guide roller is an integral structure composed of a rotating shaft 241 and a cylinder 242, the rotating shaft is rotatably connected with a shaft hole on the female die block, and a limiting block 243 is arranged on the lower template and is used for limiting the rotating shaft to prevent the rotating shaft from axially displacing; the advantages are that: the structure is simple, the manufacturing cost is low, and the maintenance and the debugging are convenient;

as shown in fig. 3 and 4, the cylinder 242 is a rectangular body, and the edge on the outer surface of the cylinder is arc-shaped; the rectangular body can increase the supporting surface, thereby improving the stability of the support and being beneficial to the stability of the workpiece in the forming process;

as shown in fig. 1 and 3, the positioning assembly 25 is composed of a positioning block 251 and a positioning pin 252, and a plurality of positioning blocks and positioning pins are uniformly distributed on the top surface of the female die block; the positioning assembly is used for limiting the displacement of the workpiece to be formed in the front and back directions;

the fixed connection part is in screw connection, so that the assembly, disassembly and maintenance are convenient.

The utility model discloses theory of operation:

as shown in fig. 1, a workpiece 3 to be formed is positioned on a female die block through a positioning assembly, a part to be bent on the workpiece is positioned in a limiting groove of a lower limiting block, an upper pressing head is driven by stamping equipment to move downwards, and a first pressing block is firstly contacted with the workpiece in the limiting groove; the upper pressing head continues to descend, and the first pressing block retracts towards the upper center hole; as shown in fig. 4, when the pressing block contacts with the end of the limiting groove, the forming surface of the first pressing block is flush with the forming surface of the upper pressing head, and the first pressing block stops retracting; the upper pressing head continues to move downwards, the pressure dividing block pushes the lower limiting block to retract towards the lower central hole, the part to be bent of the workpiece starts to be bent through the first pressing block and the upper pressing head, meanwhile, two ends of the workpiece slide towards a forming cavity of the female die block, the guide roller rotates along with the workpiece in the sliding process, and the workpiece is in sliding friction on the guide roller, so that the problem that the surface of the workpiece is scratched is solved; when the groove bottom of the limiting groove is flush with the forming surface of the female die block, namely the upper pressure head descends to the limit position, and the workpiece is formed; and after the upper pressure head returns, the first pressing block and the lower limiting block return to the initial state through the corresponding nitrogen springs.

Claims (5)

1. The utility model provides a hollow pedal arm stamping forming die, includes punch die and lower die, its characterized in that: the upper male die comprises an upper pressure head, and a floating upper limiting assembly and a pressure dividing block assembly are arranged on the forming surface of the upper pressure head; the floating upper limit component comprises an upper nitrogen spring and a prior pressing block, an upper central hole is formed in the upper pressing head, the upper nitrogen spring and the prior pressing block are positioned in the upper central hole, the upper nitrogen spring is used for driving the prior pressing block, the forming surface of the prior pressing block is flush with the forming surface of the upper pressing head, and the prior pressing block is used for limiting a workpiece; the pressure dividing block assembly is fixed on the forming surface of the upper pressure head and used for pushing the floating lower limiting assembly; the lower female die comprises a lower die plate, a female die block is arranged on the lower die plate, a floating lower limiting assembly and a guide roller assembly are arranged in a forming cavity of the female die block, the guide roller assembly is used for supporting a workpiece, and a positioning assembly is arranged on the top surface of the female die block and used for positioning the workpiece to be formed; the floating lower limiting component comprises a lower nitrogen spring and a lower limiting block, a lower central hole is formed in the female die block, the lower nitrogen spring and the lower limiting block are located in the lower central hole, the lower nitrogen spring is used for driving the lower limiting block, the lower limiting block can limit a workpiece in the vertical direction in cooperation with the preceding pressing block, and the lower limiting block moves downwards through the lower limiting block component.

2. The hollow pedal arm press-forming die according to claim 1, wherein: the support surface of the lower limiting block is provided with a limiting groove, the forming surface of the advanced pressing block can extend into the limiting groove, and the groove wall of the limiting groove is in contact fit with the pressing dividing block.

3. The hollow pedal arm press-forming die according to claim 1 or 2, wherein: the guide roller assembly is composed of two sets of guide rollers, the guide rollers form an integral structure through a rotating shaft and a barrel body, the rotating shaft is connected with a shaft hole in a rotary mode in a partitioning mode through a female die, a limiting block is arranged on a lower die plate, and the limiting block is used for limiting the rotating shaft.

4. The hollow pedal arm press-forming die according to claim 3, wherein: the barrel is rectangular, and the edge on the outer surface of the barrel is arc-shaped.

5. The hollow pedal arm press-forming die according to claim 3, wherein: the positioning assembly is composed of positioning blocks and positioning pins, and the positioning blocks and the positioning pins are uniformly distributed on the top surfaces of the female die blocks.

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