A kind of valve protection cap bi-directional punching die
The utility model relates to a kind of pipe fitting punch die, relates in particular to a kind of valve protection cap bi-directional punching die.
In pipe fitting process, for the punching die that only has a punch, a punching press can only hole of moulding, sometimes need two symmetrical holes of pipe fitting sidewall upper punch, just need first in hole of a side blow, then pipe fitting Rotate 180 degree is rushed to another hole again, very inconvenient like this, productivity ratio is low.Because be not a stamping-out moulding, second hole of product punching needs rotational workpieces, when pipe fitting rotation, will produce error, causes the shape position error to perforation, can not ensure that two holes are on same axis, and exceeding allowable tolerance will often cause workpiece to scrap.On the other hand, in the monolateral workpiece even fracture that can deform stressed in the situation that.
Publication number is that the Chinese patent literature of CN201960043U discloses a kind of Novel cantilever type bidirectional punching die, relate to a kind of diel, comprise upper bolster, die shoe, die shank, upper male mould, guide pin bushing and guide pillar, on upper male mould, be provided with stripper, on stripper, be provided with discharging spring, upper male mould is socketed with blank holder outward, position corresponding with upper male mould on die shoe is provided with lower punch, between upper male mould and lower punch, be provided with movable matrix, on die shoe, be vertically installed with little guide pillar, movable matrix is socketed on little guide pillar by little guide pin bushing, movable matrix is vertical with little guide pillar and can slide up and down along little guide pillar, the two sections sidewall surfaces that little guide pillar and movable matrix are corresponding is respectively arranged with upper limit position block and lower position block, the position that the position that movable matrix upper surface is corresponding with upper male mould and lower surface and lower punch are corresponding has die hole.
Although this Novel cantilever type bidirectional punching die has been realized bidirectional punching simultaneously, because blanking pressure is born by cantilever, the blanking pressure that cantilever bears is larger.Especially the thicker pipe fitting of tube wall produces larger reaction force in the time of punching, acts on cantilever, makes die wear very fast.Shorten die life on the one hand, reduced on the other hand the quality of fit of mould, also just reduced punching precision.
Utility model content
The utility model, for the not high problem of existing punching die symmetrical holes punching precision, provides a kind of valve protection cap Bidirectional hole punching device.
A kind of valve protection cap bi-directional punching die, comprises base, also comprises:
Two slide blocks, slide along described base relative level;
Two punch, are separately fixed on corresponding slide block;
Lifter plate, relatively described base vertical motion;
Carve type piece for two, be fixed on described lifter plate and relatively draw close for pushing two slide blocks;
Return springs, is connected between described two slide blocks;
Die socket, is fixed on described base, between described two slide blocks;
Two dies, are embedded on described die socket, and each die connects hole with rushing of matching with corresponding punch.
Lifter plate is in the process of motion straight down, carve type piece for two and push corresponding slide block, two slide blocks are flatly drawn close to die socket, two punch act on the valve protection cap being socketed on convex mould base simultaneously, under the mating reaction of corresponding die, on valve protection cap, be rushed out two symmetrical holes, subsequently simultaneously, lifter plate moves straight up, and two slide blocks reset under the effect of return springs.
The end face of described lifter plate is provided with die shank.Die shank is connected with punch press, and the stroke of lifter plate is by punch press control.
When the type piece of carving acts on slide block, slide block is carved the reaction force of type piece horizontal direction, and long-time use can make to carve disconnection between type piece and lifter plate and affect die life; Meanwhile, carve type piece and slide block relative position generation deviation also can affect die life, and punching precision is also had a certain impact.
In order to increase the service life of mould and to improve punching precision, preferably, carve type piece and be provided with the lead-in chamfered that is in lifter plate below for described two, lead-in chamfered below is also provided with guide, and described base is provided with the pilot hole that the guide of carving type piece with two matches.
Two lead-in chamfered of carving type piece parallel with the inclined-plane of corresponding slide block, are carving under the mating reaction of type piece and slide block, and the impulse force of vertical direction is converted into the impulse force of horizontal direction.
In order to improve punching precision, also in order to ensure that slide block is in motion process, the inclined-plane of slide block all the time with the lead-in chamfered keeping parallelism of carving type piece, preferably, described base is provided with two gathering sills, described two slide blocks are arranged on respectively in corresponding gathering sill.
Described two gathering sills are on same straight line.
As preferably, on each slide block, be fixed with convex mould base, described two punch are separately fixed on corresponding convex mould base.
Change conveniently for described convex mould base, preferably, on each slide block, be equipped with side slot, corresponding convex mould base is fixedly plugged in this side slot.
As preferably, a described convex mould base dorsad side of die socket is provided with anticreep flange, is provided with the stopper slot matching with anticreep flange in the side slot at convex mould base place.
Described punch has with the anticreep flange similar structures of convex mould base and matches with convex mould base.
As preferably, described return springs is polyurethane rubber piece.Avoid the wearing and tearing of metallic elastic part to mould, increased die life.
In order to facilitate the scrap that punching produces to discharge, preferably, the inside of described die socket is provided with each punching and connects the chip-removal hole that hole is communicated with.
Described chip-removal hole vertically connects die socket.
As preferably, the inside of described die socket is also provided with and is communicated with chip-removal hole and each punching connects the transitional pore between hole.
The beneficial effects of the utility model are also: die socket inside is provided with vertical chip-removal hole, and the discharge of the scrap of being more convenient for, enhances productivity.
Brief description of the drawings
Fig. 1 is the schematic diagram of the utility model valve protection cap bi-directional punching die.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model valve protection cap bi-directional punching die is described in detail.
As shown in Figure 1, a kind of valve protection cap bi-directional punching die comprise die shank 1, carve type piece 2, carve type piece 18, slide block 6, slide block 15, die socket 4, die socket 17, punch 5, punch 16, base 7, die 10, die 13, die socket 11, polyurethane rubber piece 12.
Base 7 is provided with two pilot holes and two gathering sills, and slide block 6 and slide block 15 slide along base 7 relative levels, carve type piece 2 and carve type piece 18 at corresponding guide along vertically sliding under the cooperation of pilot hole.
The guide 20 of carving type piece 2 matches with the pilot hole 21 on base 7, and the guide 24 of carving type piece 2 matches with the pilot hole 23 on base 7.
Slide block matches with the type piece of carving by lead-in chamfered, and when the type piece of carving moves straight down, slide block is extruded to be drawn close.
Carve type piece 2 and carve type piece 18 and be fixed on lifter plate 3 simultaneously.
Die shank 1 is fixed on lifter plate 3 end faces, is connected with punch press.
Die socket 11, between slide block 6 and slide block 15, is fixed on base 7 by a fixture (not shown).
Slide block 6 is provided with side slot near a side of die socket 11, and convex mould base 4 is fixed in the side slot of slide block 6, and convex mould base 4 ends have an anticreep flange 8, and anticreep flange 8 mates with the stopper slot of described side slot.
Symmetrically, slide block 15 is provided with side slot near a side of die socket 11, and convex mould base 17 is fixedly plugged in the side slot of slide block 15, and convex mould base 17 ends have an anticreep flange 22, and anticreep flange 22 mates with the stopper slot of described side slot.
Die 13 has a punching to connect hole 14, and die 10 has a punching to connect hole 9.Die 13 and die 10 are fixed on die socket 11 symmetrically.
Die socket 11 inside are provided with the chip-removal hole of vertical perforation die socket 11, and the transitional pore of chip-removal hole by die socket 11 inside connects hole 14 and punching with punching simultaneously and connect hole 9 and be communicated with.
Polyurethane rubber piece 12 is between slide block 6 and slide block 15.
While using the utility model mould, valve protection cap 19 is enclosed within on die socket.Under punch press pressure-acting, wedge type block moves straight down, and at the extruding sliding block of wedge type block, towards valve protection cap 19 direction horizontal slips, two punch act on the left and right sides of valve protection cap simultaneously, on valve protection cap 19, be rushed out two symmetrical holes, the scrap of generation is pushed in chip-removal hole.
Punching finishes rear wedge type block moves straight up, and slide block resets under polyurethane rubber piece thrust, takes out valve protection cap.
The foregoing is only better implementation example of the present utility model, be not limited to the utility model, all within the utility model spirit and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.