CN111097837A

CN111097837A - Reverse punching die for circular tube part

Info

Publication number: CN111097837A
Application number: CN201911297376.2A
Authority: CN
Inventors: 徐锋来
Original assignee: SUZHOU JINHONGSHUN AUTO PARTS CO Ltd
Current assignee: SUZHOU JINHONGSHUN AUTO PARTS CO Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-05-05

Abstract

The invention discloses a circular tube part reverse punching die with a simple and compact structure, which comprises an upper die base and a lower die base, wherein the lower die base is provided with a lower forming base, the lower forming base is provided with a lower forming groove matched with the appearance of a workpiece, the upper die base is provided with a material pressing block, the material pressing block is provided with a material pressing groove matched with the workpiece, the lower die base is provided with an installation base beside the lower forming base, the installation base is movably provided with a floating base through a nitrogen spring, the upper die base is provided with a driving block for pressing the floating base downwards during die assembly, the floating base is provided with a floating core rod, the floating core rod is internally provided with an installation groove with a downward opening, an internal pressure block for pressing the lower part of the inner wall of the workpiece is movably arranged in the installation groove through the nitrogen spring, a punch is arranged in the floating core rod, the internal pressure block is provided with a yielding hole for the punch to pass through, the lower forming base is provided with a punching die.

Description

Reverse punching die for circular tube part

Technical Field

The invention relates to a stamping die, in particular to a reverse punching die for a circular tube part.

Background

Need punch a hole on the chassis sleeve pipe and process, because of the sleeve pipe will assemble the rubber bush, the product requires inner wall hole no burr, and inner wall circularity tolerance requires the precision height, and the sleeve pipe outer wall matches the welding and does not have too high requirement. The existing processing process comprises the following steps: 1. normal mechanism forward punches a hole, and the burr direction of punching a hole is at the inside wall. 2. And finishing chamfering and burr pressing through secondary punching.

The disadvantages of this method are: 1) in order to ensure that the inner side wall of the sleeve is free of burrs, two working procedures are required to complete stamping, and stamping cost is increased. 2) The production efficiency is low, the manual work is slow, and the labor cost of the two-process punching is high.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the reverse punching die for the circular tube part is simple and compact in structure.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the reverse punching die for the circular tube parts comprises an upper die base and a lower die base, wherein a lower forming base is arranged on the lower die base, a lower forming groove matched with the appearance of a workpiece is formed in the lower forming base, a material pressing block is arranged on the upper die base, the material pressing groove matched with the workpiece is formed in the material pressing block, an installation base is arranged beside the lower forming base on the lower die base, a floating base is movably arranged on the installation base through a nitrogen spring, a driving block for pressing the floating base downwards during die assembly is arranged on the upper die base, a floating core rod which is matched with an inner hole of the workpiece and is horizontally arranged for sleeving the workpiece is arranged on the floating base, a mounting groove with a downward opening is formed in the floating core rod, an inner pressure block for compressing the lower part of the inner wall of the workpiece is movably arranged in the mounting groove through the nitrogen spring, a punch is arranged in the floating core rod, a avoiding hole for the punch to penetrate through is formed in the inner pressure block, punching die buttons.

As a preferable scheme, a positioning support block matched with the wall thickness of the workpiece is detachably arranged below the end part of the buoyancy lifting core rod extending out of the circular tube part, and a lower support block matched with the lower die base is arranged on the lower die base.

As a preferable scheme, a force application platform is arranged on the upper surface of the end part of the buoyancy lifting core rod extending out of the circular tube part, and a pressing block matched with the buoyancy lifting core rod is arranged on the upper die base.

The invention has the beneficial effects that:

the die reduces the stamping frequency and realizes the completion of stamping in a single process; the burr direction is outside the pipe fitting after punching, it has no influence on the chassis sleeve type part completely, thus ensuring the reliability of pipe assembly and improving the product quality; the production efficiency is improved, and the labor cost is reduced.

The floating seat is movably arranged on the mounting seat through a nitrogen spring, a driving block for pressing the floating seat downwards during die assembly is arranged on the upper die seat, a floating core rod which is matched with an inner hole of a workpiece and is horizontally arranged for sleeving the workpiece is arranged on the floating seat, a mounting groove with a downward opening is formed in the floating core rod, an inner pressure block for compressing the lower part of the inner wall of the workpiece is movably arranged in the mounting groove through the nitrogen spring, a punch is arranged in the floating core rod, a dodging hole for the punch to penetrate is formed in the inner pressure block, a punching die button matched with the punch is arranged on the lower forming seat, and a plurality of matched limiting blocks for controlling the material pressing stroke of the floating core rod are respectively arranged on the upper die seat and the lower die seat.

Because the positioning supporting block matched with the wall thickness of the workpiece is detachably arranged below the end part of the floating core rod extending out of the circular tube part, and the lower die holder is provided with the lower supporting block matched with the lower die holder, the die can better adapt to the processing of workpieces with different thicknesses.

Because the end upper surface that the core stick that rises by buoyancy stretches out the pipe part is equipped with the application of force platform, be equipped with matched with briquetting on the upper die base for the work piece atress is more steady, further avoids the work piece to produce deformation when processing man-hour.

Drawings

Fig. 1 is a schematic perspective view of the lower mold of the present invention.

Fig. 2 is a schematic perspective view of the upper mold of the present invention.

Fig. 3 is a schematic cross-sectional view of the lower mold of the present invention.

In fig. 1 to 3: 1. the die comprises an upper die base, a lower forming base, a material pressing block, a mounting base, a floating base, a driving block, a floating core rod, a force application platform, a pressing block, a punch, a punching die button, a limiting block, a positioning supporting block, a lower supporting block and a pressing block, wherein the upper die base is 2, the lower die base is 3, the pressing block is 4, the mounting base is 5, the floating base is 6, the driving block is 7, the floating core rod is 8, the.

Detailed Description

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1-3, the reverse punching die for circular tube parts comprises an upper die holder 1 and a lower die holder 2, wherein the lower die holder 2 is provided with a lower forming seat 3, the lower forming seat 3 is provided with a lower forming groove matched with the shape of a workpiece, the upper die holder 1 is provided with a material pressing block 4, the material pressing block 4 is provided with a material pressing groove matched with the workpiece, the lower die holder 2 is provided with an installation seat 5 beside the lower forming seat 3, the installation seat 5 is movably provided with a floating seat 6 through a nitrogen spring, the upper die holder 1 is provided with a driving block 7 for pressing the floating seat 6 downwards during die assembly, the floating seat 6 is provided with a floating core rod 8 which is matched with an inner hole of the workpiece to suit the horizontal arrangement of the workpiece, the floating core rod 8 is provided with a mounting groove with a downward opening, an inner pressure block 9 for pressing the lower part of the inner wall of the workpiece is movably arranged in the mounting groove through the nitrogen spring, the lower forming base 3 is provided with a punching die button 11 matched with the punch 10, and the upper die base 1 and the lower die base 2 are respectively provided with a plurality of matched limiting blocks 12 for controlling the material pressing stroke of the floating core rod 8.

A positioning supporting block 13 matched with the wall thickness of the workpiece is detachably arranged below the end part of the buoyancy lifting core rod 8 extending out of the circular tube part, and a lower supporting block 14 matched with the lower die base 2 is arranged. The upper surface of the end part of the buoyancy lifting core rod 8 extending out of the circular tube part is provided with a force application platform 81, and the upper die holder 1 is provided with a matched pressurizing block 15.

During processing, a circular tube workpiece is sleeved on the floating core rod 8, the inner pressing block 9 on the floating core rod 8 can tightly press the workpiece in the lower forming seat 3, then the upper die seat 1 presses downwards, the pressing block 4 presses the workpiece, and the driving block 7 drives the floating core rod 8 to move downwards, so that the punch 10 is driven to complete punching processing.

The above-mentioned embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be used, not restrictive; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.

Claims

1. Reverse cut-out press of pipe part, including upper die base and die holder, be equipped with down the shaping seat on the die holder, be equipped with down the shaping groove with work piece appearance matched with on the shaping seat down, be equipped with on the upper die base and press the material piece, be equipped with on the material piece and press the material groove with work piece matched with, its characterized in that: the die comprises a lower die base, a lower forming base and a floating seat, wherein the lower die base is provided with a mounting base beside the lower forming base, the mounting base is movably provided with the floating seat through a nitrogen spring, the upper die base is provided with a driving block for pressing the floating seat downwards during die assembly, the floating seat is provided with a floating core rod which is matched with an inner hole of a workpiece and is horizontally arranged with the sleeved workpiece, the floating core rod is internally provided with a mounting groove with a downward opening, an inner pressure block for compressing the lower part of the inner wall of the workpiece is movably arranged in the mounting groove through the nitrogen spring, a punch is arranged in the floating core rod, the inner pressure block is provided with a dodging hole for the punch to pass through, the lower forming base is provided with a punching die button matched with the.

2. The reverse punching die for round pipe parts according to claim 1, wherein: the lower die base is provided with a lower supporting block matched with the wall thickness of the workpiece, and the lower die base is detachably provided with a positioning supporting block matched with the wall thickness of the workpiece.

3. The reverse punching die for round pipe parts according to claim 2, wherein: and a force application platform is arranged on the upper surface of the end part of the buoyancy lifting core rod extending out of the circular tube part, and a matched pressurizing block is arranged on the upper die base.