CN103691802A

CN103691802A - Cutoff die for air outlet taper pipe shell of automobile engine exhaust system

Info

Publication number: CN103691802A
Application number: CN201310584052.3A
Authority: CN
Inventors: 白瑛; 曹一枢
Original assignee: 无锡曙光模具有限公司
Priority date: 2013-11-20
Filing date: 2013-11-20
Publication date: 2014-04-02
Also published as: CN103691802B

Abstract

The invention provides a cutoff die for the air outlet taper pipe shell of an automobile engine exhaust system. According to the cutoff die for the air outlet taper pipe shell of the automobile engine exhaust system, the shell molded surfaces of an upper half shell and a lower half shell are guaranteed to be integral after cutoff, the working procedures of subsequent shaping processing are reduced, and the production efficiency is effectively improved. The cutoff die for the air outlet taper pipe shell of the automobile engine exhaust system comprises an upper die structure and a lower die structure, wherein the upper die structure comprises an upper template and a fixed plate; the fixed plate is installed below the upper template; the lower die structure comprises a lower template and a mounting plate; the lower template is installed on the mounting plate via die feet; the upper die structure and the lower die structure are subjected to guiding die assembling via a sliding independent guide element. The cutoff die for the air outlet taper pipe shell of the automobile engine exhaust system is characterized in that the upper die structure also comprises a cutoff terrace die structure, and the lower die structure also comprises a workpiece positioning sinking die structure.

Description

The cut-out mould of automobile engine exhaust system air outlet taper pipe shell

Technical field

The present invention relates to the punch process field of automotive engine component, be specially the cut-out mould of automobile engine exhaust system air outlet taper pipe shell.

Background technology

A kind of automobile engine exhaust system air outlet taper pipe shell, its structure is shown in Fig. 1, it is applied to automobile engine exhaust system hot junction, during installation, one end is connected with purifier carrier, the other end is connected with starting the flange of pusher side, its parts required precision is high, these parts mostly were stainless steel precision castings in the past, so its processing cost is high and working (machining) efficiency is low.In order to reduce the processing cost of these parts and to improve working (machining) efficiency, now progressively adopt the method for punch process to produce this parts, according to the design feature of these parts, these parts are divided into upper half shell 22 and lower half shell 23 in punch process, see Fig. 2 and Fig. 3, the process route of its punch process is for first distinguishing punch forming upper half shell and lower half shell, again upper half shell and lower half shell amalgamation are welded into integral body, in Fig. 2 and Fig. 3, 24 is the big opening end of upper half shell, 25 is the osculum end of upper half shell, 26 is the big opening end of lower half shell, 27 is the osculum end of lower half shell, when upper half shell 22 and lower half shell 23 amalgamation, the big opening end 24 of upper half shell and big opening end 26 amalgamations of lower half shell, the osculum end 25 of upper half shell and osculum end 27 amalgamations of lower half shell.In order to reduce manufacturing procedure, improve working (machining) efficiency, the drawing and forming of upper half shell and lower half shell adopts and connects the method for expecting integrated punching drawing and forming, after even expecting integrated punching drawing and forming, need cutting workpiece to form independently upper half shell and lower half shell, see Fig. 4, owing to connecting, the workpiece with form surface of expecting after integrated punching drawing and forming is complicated, and be thin-wall case workpiece, when its punching press is cut off because workpiece positioning compression difficulty causes upper half shell, the place, cut-out limit of lower half shell is prone to wrinkling, the defects such as depression, cut off the rear upper half shell of processing and lower half shell and need respectively to carry out again shaping processing, the working (machining) efficiency of whole workpiece is reduced.In Fig. 1,28 is the welded seam of upper half shell 22 and lower half shell 24, and in Fig. 4,29 for cutting off line signal.

Summary of the invention

For the problems referred to above, the invention provides the cut-out mould of automobile engine exhaust system air outlet taper pipe shell, it can guarantee to cut off the complete of rear upper half shell and lower half shell housing profile.

Its technical scheme is such, it comprises upper die structure and lower die structure, described upper die structure comprises cope match-plate pattern and fixed head, described fixed head is installed under described cope match-plate pattern, described lower die structure comprises lower bolster, installing plate, described lower bolster is installed on described installing plate by mould pin, described upper die structure and lower die structure are by slip independent pilot part guiding matched moulds, it is characterized in that: described upper die structure also comprises cut-out punch structure, described lower die structure also comprises workpiece positioning female die structure.

It is further characterized in that:

Described cut-out punch structure comprises holding pad, cuts off punch, described holding pad is installed on described fixed head below and is connected with described fixed head with unloading bolt by spring, and described cut-out punch is installed in described fixed head and is passed down through described holding pad;

Discharging guide pillar is also installed in described fixed head, in corresponding described discharging guide pillar position, described holding pad, has pilot hole, discharging guide pin bushing is installed in described pilot hole, described discharging guide column sleeve is loaded in described discharging guide pin bushing;

Described workpiece positioning female die structure comprises that locating piece, upper half shell cut off re-entrant mold mold insert, lower half shell cuts off re-entrant mold mold insert, described locating piece is installed on described lower bolster, described upper half shell cuts off re-entrant mold mold insert, lower half shell cuts off re-entrant mold mold insert and along correspondence, cuts off limit insert in described locating piece respectively, workpiece upper half shell stub end limited block is installed in the horizontal left side of described locating piece, described workpiece stub end limited block in described cope match-plate pattern, is also provided with workpiece lower half shell stub end limited block by end locating piece limit mounting on described locating piece.

While adopting mould of the present invention to carry out punching press cut-out to connecting the shell workpiece of expecting after one-body molded processing, its holding pad is tightly pressed in locating piece by workpiece, upper half shell cuts off re-entrant mold mold insert, lower half shell cuts off on re-entrant mold mold insert, and workpiece upper half shell stub end limited block, workpiece stub end limited block plays good position-limiting action to workpiece, therefore it can effectively be avoided because of upper half shell after the difficult cut-out causing of workpiece positioning compression, it is wrinkling that lower half shell cuts off limit, the defects such as depression, guarantee accurate processing, thereby effectively reduced follow-up shaping manufacturing procedure, enhance productivity, and between fixed head and holding pad, be also connected with discharging guide pillar, and can further guarantee the reliable compression of holding pad to workpiece, thereby guarantee to cut off the accurate of the die-cut position of punch, prevent from cutting partially.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of automobile engine exhaust system air outlet taper pipe shell of Mould Machining of the present invention;

Fig. 2 is the structural representation of upper half shell of the kind automobile engine exhaust system air outlet taper pipe shell of Mould Machining of the present invention;

Fig. 3 is the structural representation of lower half shell of the kind automobile engine exhaust system air outlet taper pipe shell of Mould Machining of the present invention;

Fig. 4 is the cutting workpiece schematic diagram of Mould Machining of the present invention;

Fig. 5 is the structural representation that the present invention cuts off mould;

Fig. 6 is the schematic top plan view that the present invention cuts off the lower die structure of mould;

Fig. 7 is that the A-A of Fig. 5 is to schematic diagram.

The specific embodiment

See Fig. 5～Fig. 7, it comprises upper die structure and lower die structure mould of the present invention, upper die structure comprises cope match-plate pattern 13 and fixed head 11, fixed head 11 is installed on cope match-plate pattern 13 times, lower die structure comprises lower bolster 3, installing plate 1, and lower bolster 3 is installed on installing plate 1 by mould pin 2, and upper die structure and lower die structure are by slip independent pilot part 15 guiding matched moulds, upper die structure also comprises cut-out punch structure, and lower die structure also comprises workpiece positioning female die structure.

Cut off punch structure and comprise holding pad 10, cut off punch 18, holding pad 10 is installed on fixed head 11 belows, also by spring 16, is connected with fixed head 11 with unloading bolt 17, cuts off punch 18 and is installed in fixed head 11 and is passed down through holding pad 10;

Discharging guide pillar 19 is also installed in fixed head 11, in corresponding discharging guide pillar 19 positions, holding pad 10, has pilot hole 21, discharging guide pin bushing 20 is installed in pilot hole 21, discharging guide pillar 19 is set in discharging guide pin bushing 20;

Workpiece positioning female die structure comprises that locating piece 4, upper half shell cut off re-entrant mold mold insert 8, lower half shell cuts off re-entrant mold mold insert 7, locating piece 4 is installed on lower bolster 3, upper half shell cut off re-entrant mold mold insert 8, lower half shell cut off re-entrant mold mold insert 7 respectively along the corresponding limit insert that cuts off in locating piece 4, workpiece upper half shell stub end limited block 6 is installed in the horizontal left side of locating piece 4, workpiece stub end limited block 6 in cope match-plate pattern 3, is also provided with workpiece lower half shell stub end limited block 9 by end locating piece 5 limit mounting on locating piece 4.

In Fig. 4, Fig. 6,12 is cushion block; In Fig. 4,14 is limited post.

Claims

1. the cut-out mould of automobile engine exhaust system air outlet taper pipe shell, it comprises upper die structure and lower die structure, described upper die structure comprises cope match-plate pattern and fixed head, described fixed head is installed under described cope match-plate pattern, described lower die structure comprises lower bolster, installing plate, described lower bolster is installed on described installing plate by mould pin, described upper die structure and lower die structure are by slip independent pilot part guiding matched moulds, it is characterized in that: described upper die structure also comprises cut-out punch structure, described lower die structure also comprises workpiece positioning female die structure.

2. the cut-out mould of automobile engine exhaust system air outlet taper pipe shell according to claim 1, it is characterized in that: described cut-out punch structure comprises holding pad, cuts off punch, described holding pad is installed on described fixed head below and is connected with described fixed head with unloading bolt by spring, and described cut-out punch is installed in described fixed head and is passed down through described holding pad.

3. the cut-out mould of automobile engine exhaust system air outlet taper pipe shell according to claim 2, it is characterized in that: discharging guide pillar is also installed in described fixed head, in corresponding described discharging guide pillar position, described holding pad, have pilot hole, discharging guide pin bushing is installed in described pilot hole, and described discharging guide column sleeve is loaded in described discharging guide pin bushing.

4. according to the cut-out mould of the automobile engine exhaust system air outlet taper pipe shell described in claim 2 or 3, it is characterized in that: described workpiece positioning female die structure comprises that locating piece, upper half shell cut off re-entrant mold mold insert, lower half shell cuts off re-entrant mold mold insert, described locating piece is installed on described lower bolster, and described upper half shell cuts off re-entrant mold mold insert, lower half shell cuts off re-entrant mold mold insert and along correspondence, cuts off limit insert in described locating piece respectively.

5. the cut-out mould of automobile engine exhaust system air outlet taper pipe shell according to claim 4, it is characterized in that: workpiece upper half shell stub end limited block is installed in the horizontal left side of described locating piece, described workpiece stub end limited block in described cope match-plate pattern, is also provided with workpiece lower half shell stub end limited block by end locating piece limit mounting on described locating piece.