Special die for lining rounding

Abstract

The utility model discloses a special mould for lining rounding, which comprises an upper mould assembly and a lower mould assembly, the upper mould assembly comprises an upper mould base, the lower end of the upper mould base is connected with an upper padding plate, the lower end of the upper padding plate is connected with an upper clamping plate, and the lower part of the upper clamping plate is fixedly provided with a forming punch. The utility model relates to the technical field of lining rounding dies, and is matched with a punching machine, under the combined action of the forming punch, the T punch and the forming insert, a flat-plate-shaped lining material sheet can be pressed into a circle at a time, after the profiling operation is completed, the upper die assembly is controlled to reset, and a formed lining sleeve is taken down. The round wrapping operation can be completed through one-time press fitting, the structure is simple and reliable, stability is good, the flatness of the formed lining is high, the rejection rate is low, the clamping process is simple and easy to operate, and the lining round wrapping operation efficiency can be greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bushing round mould technical field, specifically for a kind of special mould for bushing round. BACKGROUND

[0002] In the processing of bushing round, round is one of key processes.The stability and precision of traditional processing mode are difficult to guarantee, and the flatness does not meet the standard, and the clamping process is cumbersome, and the efficiency is low, cannot satisfy the requirement of modern industrial production to high precision and high efficiency, in view of this, in-depth research is conducted for the above problems, and the present case is generated. UTILITY MODEL CONTENTS

[0003] In view of the deficiencies of the prior art, the utility model provides a special mould for bushing round, which solves the problems raised in the background art.

[0004] To achieve the above purpose, the utility model realizes the following technical scheme: a special mould for bushing round, comprising an upper die assembly and a lower die assembly;

[0005] The upper die assembly comprises an upper die seat, the lower end of the upper die seat is connected with an upper backing plate, the lower end of the upper backing plate is connected with an upper clamping plate, a forming punch is fixedly arranged on the lower part of the upper clamping plate, a sliding punch is arranged on one side of the forming punch, limit protrusions are arranged on the upper ends of both sides of the sliding punch, the upper backing plate and the upper clamping plate are provided with sliding grooves at the positions of the limit protrusions, a T punch is installed on the sliding punch, one end of the T punch extends below the forming punch, a die handle is arranged on the top of the upper die seat, a nitrogen spring is installed at the position of the die handle, and the extension end of the nitrogen spring is connected with the top end of the sliding punch.

[0006] The lower die assembly comprises a lower die plate, the lower end of the lower die plate is provided with a lower backing plate, the lower backing plate is installed on a lower die seat, an assembly groove is arranged on the lower die plate, a forming insert is arranged in the assembly groove, an avoiding groove is formed on one side of the assembly groove at the position corresponding to the sliding punch, and the size of the avoiding groove is matched with the size of the sliding punch.

[0007] The lower end surface of the forming punch is U-shaped protruding structure, and the top surface of the U-shaped protrusion is a circular arc surface.

[0008] The upper end surface of the forming insert is a special concave surface, the central part of the special concave surface is a circular arc surface, and the two sides are smooth arc surfaces matched with the U-shaped protrusion.

[0009] The T punch is a stepped column type rod piece, and is assembled and connected with the sliding punch through a mounting seat.

[0010] The lower part of the upper clamping plate is assembled and connected with an inner guide column, and a guide hole is arranged on the upper end surface of the lower die plate at the position corresponding to the inner guide column.

[0011] The lower die base is symmetrically provided with a buffer type outer guide column, which is opposite to the upper die base.

[0012] The utility model provides a special mould for bushing round packing. Have the following beneficial effect: the special mould for bushing round packing, including upper die subassembly and lower die subassembly, when using, place the bushing material piece to the forming insert, control the punch press ram down, thereby promote the upper die base downward movement, T punch first with the bushing raw material piece central part contact, and continuously downward movement is extruded to the bushing raw material piece, under the cooperation of forming insert, extrude the bushing material piece into U shape, the punch press ram continuously down, sliding punch block bottom and the avoidance groove bottom surface contact, sliding punch block top extrusion nitrogen gas spring, nitrogen gas spring shrink under force, the upper die base continues to press down, and push the forming punch is extruded to the U shape bushing material piece, under the cooperation of forming punch, T punch, forming insert, the U shape bushing material piece is pressed into circular, control upper die subassembly reset, and the bushing after forming can be taken down, once press mounting can complete round packing operation, simple structure, reliable, good stability, the bushing after forming has higher flatness, low scrap rate, and the clamping process is simple, easy to operate, can greatly improve bushing round packing operation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a front view structural schematic diagram of the special mould for bushing round packing.

[0014] Figure 2 It is a side view sectional view structural schematic diagram of the special mould for bushing round packing.

[0015] Figure 3 It is a partial axonometric structural schematic diagram of the special mould for bushing round packing.

[0016] Figure 4 It is a partial enlarged structural schematic diagram of the special mould for bushing round packing under operation state.

[0017] Figure 5 It is a front view structural schematic diagram of the sliding punch block.

[0018] Figure 6 It is a top view sectional view structural schematic diagram of the sliding punch block.

[0019] Figure 7 It is a structural schematic diagram of the bushing material piece.

[0020] Figure 8 It is a product structural schematic diagram of the bushing after forming.

[0021] Figure: 1, the upper die holder; 2, the upper base plate; 3, the upper clamping plate; 4, the lower die plate; 5, the lower base plate; 6, the lower die holder; 7, the forming punch; 8, the forming insert; 9, the sliding punch; 10, the mounting seat; 11, the T punch; 12, the nitrogen gas spring; 14, the die handle; 15, the inner guide column; 16, the buffer type outer guide column. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] Embodiment: combined with the drawings in the description Figures 1-8It can be known that the application specifically designs a special mold for bushing wrapping, which comprises an upper mold assembly and a lower mold assembly, wherein the upper mold assembly comprises an upper mold base 1, the lower end of the upper mold base 1 is connected with an upper backing plate 2, the lower end of the upper backing plate 2 is connected with an upper clamping plate 3, the lower part of the upper clamping plate 3 is fixedly provided with a forming punch 7, one side of the forming punch 7 is provided with a sliding punch block 9, the upper end of the sliding punch block 9 is provided with a limiting protrusion on both sides, the upper backing plate 2 and the upper clamping plate 3 are provided with a sliding groove at the position of the limiting protrusion, a T punch 11 is installed on the sliding punch block 9, one end of the T punch 11 extends below the forming punch 7, a mold handle 14 is arranged on the top of the upper mold base 1, a nitrogen spring 12 is installed at the position of the mold handle 14, and the telescopic end of the nitrogen spring 12 is connected with the top end of the sliding punch block 9; the lower mold assembly comprises a lower mold plate 4, the lower end of the lower mold plate 4 is provided with a lower backing plate 5, the lower backing plate 5 is installed on a lower mold base 6, the lower mold plate 4 is provided with an assembly groove, the assembly groove is provided with a forming insert 8, an avoiding groove is arranged at the position corresponding to the sliding punch block 9 on one side of the assembly groove, the size of the avoiding groove is matched with the size of the sliding punch block 9, in use, the bushing material piece is placed on the forming insert, the punch head of the stamping machine is controlled to move downward, so as to push the upper mold base 1 to move downward, the T punch 11 first contacts the central part of the bushing raw material piece and continuously moves downward to extrude the bushing raw material piece, under the cooperation of the forming insert, the bushing material piece is extruded into a U shape, the punch head of the stamping machine continuously moves downward, at this time, the bottom of the sliding punch block 9 is in contact with the bottom surface of the avoiding groove, the top of the sliding punch block 9 extrudes the nitrogen spring 12, the nitrogen spring 12 is contracted under stress, the upper mold base 1 continuously presses down, the forming punch 7 is pushed to extrude the U-shaped bushing material piece, under the cooperation of the forming punch 7, the T punch 11 and the forming insert, the U-shaped bushing material piece is pressed into a circle, the upper mold assembly is controlled to reset, and the formed bushing can be taken down, the wrapping operation can be completed at one time, the structure is simple, reliable and stable, the flatness of the formed bushing is high, the waste rate is low, the clamping process is simple and easy to operate, and the bushing wrapping operation efficiency can be greatly improved.

[0024] In the implementation process, as the preferred arrangement, the lower end face of the forming punch 7 is a U-shaped protruding structure and the top face of the U-shaped protrusion is a circular arc face, wherein the upper end face of the forming insert 8 is a special-shaped concave face, the center part of the special-shaped concave face is a circular arc face and the two sides are smooth arc faces matched with the U-shaped protrusion, the bushing piece is placed on the forming insert 8, under the pressure of the punch head of the press, the upper die seat 1 moves downward as a whole, the T punch 11 first extrudes the bushing piece, so that the middle part of the bushing piece enters the circular arc face of the center part of the special-shaped concave face of the forming insert 8, the two sides of the bushing piece are naturally raised upward under the action of force, when the upper die seat 1 further moves downward, the nitrogen gas spring 12 is contracted under the action of force, so that the T punch 11 remains in the current position, and the forming punch 7 continues to extrude the bushing piece downward, under the limiting action of the circular arc face of the lower end face of the forming punch, the bushing piece is further deformed and extruded into a cylindrical shape and is sleeved on the T punch 11, the U-shaped protrusion is completely matched with the smooth arc faces on the two sides of the special-shaped face, so that the quality of the round forming can be effectively ensured.

[0025] In the implementation process, as the preferred arrangement, the T punch 11 is a stepped column type rod and is assembled and connected with the sliding punch block 9 through the mounting seat 10, so that the T punch 11 can be replaced and maintained.

[0026] In the implementation process, as the preferred arrangement, the lower part of the upper clamping plate 3 is assembled and connected with the inner guide column 15, the upper end face of the lower die plate 4 is provided with a guide hole corresponding to the position of the inner guide column 15, the cooperation between the upper die assembly and the lower die assembly is slidingly guided, and the forming quality is improved.

[0027] In the implementation process, as the preferred arrangement, the buffer type outer guide column 16 is symmetrically installed on the lower die seat 6 and faces the lower part of the upper die seat 1, so that the upper die seat 1 is provided with a buffer force in the vertical direction and the excessive extrusion can be effectively avoided, and the quality of the round forming operation is ensured.

[0028] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A special die for bushing coining, characterized by, Including upper die assembly and lower die assembly, the upper die assembly includes upper die seat, the lower end of upper die seat is connected with upper pad, the lower end of upper pad is connected with upper clamping plate, the lower part of upper clamping plate is fixedly provided with forming punch, the side of forming punch is provided with sliding block, the upper end of sliding block is provided with limiting lug on both sides, the position of limiting lug is provided with sliding slot on upper pad and upper clamping plate, the T punch is installed on sliding block, the one end of T punch extends to the lower of forming punch, the top of upper die seat is provided with die handle, the position of die handle is installed with nitrogen spring, the telescopic end of nitrogen spring is connected with the top of sliding block; The lower die assembly includes lower die plate, the lower end of lower die plate is provided with lower pad, the lower pad is installed on lower die seat, the upper of lower die plate is provided with assembly slot, the assembly slot is provided with forming insert, the position of assembly slot is provided with avoiding slot on the side of sliding block, the size of avoiding slot is matched with the size of sliding block.

2. A special die for bushing coining according to claim 1, wherein The lower end surface of forming punch is U-shaped convex structure and the top surface of U-shaped convex is circular arc surface.

3. A bushing coining die as set forth in claim 2, wherein The upper end surface of forming insert is special-shaped concave surface, the center part of special-shaped concave surface is circular arc surface, and both sides are smooth arc surface matched with U-shaped convex.

4. A special die for bushing coining according to claim 1, wherein The T punch is ladder-shaped column type rod and is assembled and connected with sliding block through mounting seat.

5. A special die for bushing coining according to claim 1, wherein The lower part of upper clamping plate is assembled and connected with inner guide column, the upper end surface of lower die plate is provided with guide hole corresponding to the position of inner guide column.

6. A bushing building die as defined in claim 1 wherein, The symmetric buffer type outer guide column is installed on the lower die seat, and the buffer type outer guide column is opposite to the lower of upper die seat.

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