CN101823270A

CN101823270A - Punching tool for processing automotive trim strip

Info

Publication number: CN101823270A
Application number: CN 201010125137
Authority: CN
Inventors: 杜奇
Original assignee: GUANGZHOU DONGHAI MINFU AUTO PARTS CO Ltd
Current assignee: GUANGZHOU DONGHAI MINFU AUTO PARTS CO Ltd
Priority date: 2010-03-15
Filing date: 2010-03-15
Publication date: 2010-09-08

Abstract

The invention relates to a punching tool for processing an automotive trim strip, which comprises an upper mold and a lower mold for arrangement of a trim strip to be cut. The upper mold is provided with an upper cutter with a downward blade, the upper cutter is provided with a vertical surface and an inclined surface, and the blade of the upper cutter is formed at the joint of the vertical surface and the inclined surface. The punching tool is characterized in that the included angle between the vertical surface and the inclined surface is 14-16 degrees, and the upper end face of the lower mold is provided with a lower cutter which is provided with an upward blade and is matched with the upper cutter. Compared with the prior art, the invention has the advantages that: on the premise of ensuring the strength of the upper cutter, the return inclination of the upper cutter is reduced, thereby facilitating the reduction of material abdication during punching, and decreasing the possibility of unevenness, crushing, burring and the like of the punched section.

Description

A kind of punching tool that is used for processing automotive trim strip

Technical field

The present invention relates to a kind of process equipment of automotive trim strip, relate in particular to a kind of punching tool.

Background technology

At present, dispose the panel of a lot of difference in functionalitys on the automobile, scrape the water panel as automobile and on function, require " scraping water ", this series products material all is very soft, and elasticity is preferably arranged, and needs in the process to carry out die-cut to it, and die-cut this series products of mould generally can produce die-cut section out-of-flatness now, weigh wounded, problems such as burr are even if mould and die accuracy is very high, begin not have these problems, also above problem will inevitably occur after die-cut a period of time, scrape the water panel because of automobile again and generally all adopt TPO (TPO) material, this material meeting oil impregnate, greasy dirt just can adhesion on cutter, further, the rate of wear of aggravation mould needs frequently to change.

Gap in the die cutting die between upper slitter and the counterdie all is to guarantee by guide pillar, guide pillar has two kinds: a kind of is the polished rod guide pillar, a kind of is the ball guide pillar, polished rod guide pillar gap is 0.02～0.03mm, this gap guarantee this type of mould die-cut be problematic, use this kind guide pillar will produce the slight cutter phenomenon of gnawing, cause the edge of a knife to wear and tear fillet very fast; Another kind is the ball guide pillar, if select the ball guide pillar for use, the gap is-0.01～-0.02mm, though it is fine that this type of guide pillar gap guarantees, but this type of guide pillar rate of wear is very fast, often need more resleeve, and effective running length of guide pillar is very short, be difficult to adapt to the die-cut of our this product, frequency of maintenance is very high.So realize the control of precision and the reduction of maintenance cost, not very feasible by changing guiding mechanism.

Extremely shown in Figure 5 as Fig. 1, punching tool of the prior art comprises patrix 1a and counterdie 2a, patrix 1a has the downward upper slitter 11a of blade, counterdie 2a is used to place material 10a to be cut, upper slitter 11a edge of a knife material returned gradient β 1 generally is to select about 45 °, as shown in Figure 2, when die-cut, edge of a knife 11a touches and does not begin material 10a thickness three/a period of time die-cutly, and material 10a elasticity is bigger, it is actually material 10a and steps down to both sides, as shown in Figure 3, wait upper slitter 11a, just begin cutting material 10a thickness 2/3rds o'clock, as shown in Figure 4, wait these material 10a returns of stepping down after die-cut the finishing.

Above-mentioned this project organization, out-of-flatness appears in die-cut product die-cut section easily, weighs wounded, phenomenons such as burr, simultaneously, the mould poor stability, wearing and tearing are severe, just hold successfully at mould, new mould production phase mould also can guarantee the die-cut quality of product substantially, in case after die-cut three to 50,000 times, mould has had preliminary wearing and tearing, just begin to occur various bad phenomenon, frequency of maintenance is very high.

Summary of the invention

Technical problem to be solved by this invention is that to provide a kind of material to step down at the above-mentioned state of the art little, the punching tool that is applicable to automotive trim strip that die-cut section is smooth.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of punching tool that is used for processing automotive trim strip, comprise patrix and the counterdie of placing for panel to be cut, wherein patrix has the downward upper slitter of blade, described upper slitter has a vertical plane and inclined plane, after crossing, this vertical plane and inclined plane formed the blade of described upper slitter, it is characterized in that the angle between described vertical plane and the inclined plane is 14 °～16 °, and, have a blade on the upper surface of described counterdie and the following cutter that matches with described upper slitter up.

Edge of a knife gap between described upper slitter and the following cutter is no more than 0.01mm.Can further eliminate burr, burr etc.

As preferably, the distance that described cutter down stretches out the counterdie upper surface is 0.2～0.3mm.The excessive words of distance are unfavorable for cutting smooth.

As the best, angle is 15 ° between the vertical plane of described upper slitter and the inclined plane.

As preferably, described cutter spacing is in an end of described counterdie upper surface down, and this time cutter also has a vertical plane and inclined plane, and the side of described vertical plane and counterdie is on the same straight line.

Compared with prior art, the invention has the advantages that: under the prerequisite that guarantees upper slitter intensity, reduce upper slitter material returned gradient and set up cutter down, help to reduce stepping down of material when die-cut, reduce die-cut section out-of-flatness, weigh the possibility that phenomenons such as burr take place wounded.Be particularly useful for automobile and scrape the cutting of TPO on the water panel (TPO).

Description of drawings

Fig. 1 is a punching tool original state schematic diagram in the prior art.

Fig. 2 touches material thickness three/a period of time view for upper slitter in the prior art.

Fig. 3 touches material thickness three/two o'clock view for upper slitter in the prior art.

View when Fig. 4 cut material and begins pultrusion for upper slitter in the prior art.

Fig. 5 is view during die-cut end for material pultrusion in the prior art finishes.

Fig. 6 is a punching tool original state schematic diagram in the embodiment of the invention.

Fig. 7 is an A portion enlarged drawing among Fig. 6.

Fig. 8 begins the cut state schematic diagram for punching tool in the embodiment of the invention.

Fig. 9 cuts to 2/3rds o'clock view of TPO sizing material thickness for upper slitter in the embodiment of the invention.

Figure 10 is the B portion enlarged drawing of Fig. 9.

View when Figure 11 goes to TPO sizing material bottom for upper slitter in the embodiment of the invention.

Figure 12 is the C portion enlarged drawing of Figure 10.

Figure 13 is view during die-cut end in the embodiment of the invention.

Figure 14 is a D portion enlarged drawing among Figure 13.

The specific embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

As shown in Figure 6 and Figure 7, the punching tool in the present embodiment comprises patrix 1 and counterdie 2, and counterdie 2 is used for placing for panel to be cut 10.Patrix 1 has the downward upper slitter of blade 11, as shown in figure 10, upper slitter 11 has a vertical plane 12 and inclined plane 13, formed the blade of upper slitter 11 after vertical plane 12 and inclined plane 13 cross, angle β 2 is preferably 14～16 ° between this vertical plane 12 and the inclined plane 13, and β 2 is 15 ° in the present embodiment, and, counterdie 2 upper surfaces one end has a blade following cutter 21 up, and following cutter 21 also has a vertical plane 22 and inclined plane 24, and vertical plane 22 is on the same straight line with a side 23 of counterdie.As shown in figure 10, to stretch out the distance h of counterdie 2 upper surfaces be 0.2～0.3mm to following cutter 21.Edge of a knife gap between upper slitter 11 and the following cutter 21 is no more than 0.01mm.

Fig. 6, Fig. 8, Fig. 9, Figure 11 and Figure 13 are followed successively by each view when die-cut, and as shown in Figure 8, upper slitter 11 touches panel 10 3/for the moment, begin cutting, as Fig. 9 and shown in Figure 10, upper slitter 11 enters panel 10 3/two o'clock, following cutter 21 has entered panel 1/10th 3, at this moment

upper slitter

11 and 21 cooperations of following cutter are finished cutting with panel 10, and, panel 10 beginning pultrusions, as shown in figure 11, when upper slitter 11 was gone to panel 10 bottoms, panel 10 pultrusions finished, and section is smooth.

Material is stepped down many more, die-cut section out-of-flatness, weigh wounded, phenomenons such as burr are serious more, step down and reduce material, just need reduce upper slitter material returned gradient (angle between vertical plane and the inclined plane), in conjunction with the following cutter of setting up, but material returned gradient is too small, will reduce upper slitter intensity, so adjusting material returned gradient under the condition of proof strength, in addition, gap between control upper slitter 11 and the following cutter 21 helps further to prevent die-cut section out-of-flatness, weighs wounded, the generation of phenomenons such as burr, simultaneously, reduced the wearing and tearing of material, prolonged the cutter useful life upper slitter.Present embodiment is particularly useful for the cutting that automobile is scraped TPO on the water panel (TPO), but is not limited to this.

Claims

1. punching tool that is used for processing automotive trim strip, comprise patrix and the counterdie of placing for panel to be cut, wherein patrix has the downward upper slitter of blade, described upper slitter has a vertical plane and inclined plane, after crossing, this vertical plane and inclined plane formed the blade of described upper slitter, it is characterized in that the angle between described vertical plane and the inclined plane is 14 °～16 °, and, a blade had on the upper surface of described counterdie and the following cutter that matches with described upper slitter up.

2. punching tool according to claim 1 is characterized in that the edge of a knife gap between described upper slitter and the following cutter is no more than 0.01mm.

3. punching tool according to claim 2 is characterized in that the distance that described cutter down stretches out the counterdie upper surface is 0.2～0.3mm.

4. according to claim 1 or 2 or 3 described punching tools, it is characterized in that angle is 15 ° between the vertical plane of described upper slitter and the inclined plane.

5. according to claim 1 or 2 or 3 described punching tools, it is characterized in that described following cutter spacing in an end of described counterdie upper surface, this time cutter also has a vertical plane and inclined plane, and the side of described vertical plane and counterdie is on the same straight line.