CN2269917Y - Precision shearing mould for bars - Google Patents

Abstract

The utility model discloses a precision shearing mould for bars. Stationary knives (2a, 2b) are arranged on the bottom board of a susceptor (8), and space blocks (3a, 3b), adjusting blocks (4a, 4b), locking blocks (5a, 5b) and stopper blocks (6a, 6b) are arranged at the inner and the outer parts of the two stationary knives. Bars (9) are arranged on a semicircular groove (13) and pressed by pressure levers, and the U-shaped opening of a movable knife (1) is arranged on the bars and positioned between the two stationary knives. When a slide block (18) of a pressing machine is pressed on a convex table of the movable knife to carry out pressurization and shearing, two blanks can be obtained. The shearing mould has the advantages of simple structure, easy manufacture and high stability of locking bars and stationary knives in a slope mode. Two blanks can be obtained through shearing once, so the production efficiency is enhanced by once.

Description

The bar accurate shearing mould

The utility model relates to the auxiliary equipment of shearing equipment, is a kind of shearing die that is used for the blanking of metal bar material cold shears.

No. 87212239 patent applications of China disclose a kind of " bar radially clamps fine shearing mould " its structure and have been.Tool fixing frame forward laps and places box frame to slide by easy on and off.It is fixed earlier bar to be pushed before shearing.In the moving knife chamber, its front end face is contacted with positioning screw end stone.When press ram was pressed door shape pressure head, leverage made the movable knife rack assembly clamp the base end, and when shearing force acted on bar, another leverage made tool fixing frame assembly pressure bar end.After base end and rod end were all clamped, tool fixing frame stopped to move down, and shearing force and clamping force sharply increase by fixed proportion, shear beginning.When shear history finished, movable knife rack was because of losing the supporting of bar, and tool fixing frame is because of losing shear knife, and their clamp resets under the effect of back-moving spring.After the press ram backhaul, fixed.Movable knife rack is got back to initial position under the effect of retracting spring.The deficiency of this shearing die is that the bar clamping force is that forcing press is by moving.Tool fixing frame realizes, because moving.The complex structure of tool fixing frame, annexation is many.Therefore, loosening and displacement easily take place in parts under the frequent vibration of shearing force, influence the stability of bar and the quality of shearing area.

The purpose of this utility model is to provide a kind of bar accurate shearing mould, and the cross section quality that it can guarantee the stability of bar and blank can once be sheared again and obtain two blanks.

In order to achieve the above object, bar accurate shearing mould of the present utility model is made up of moving knife and bracing or strutting arrangement, stationary knife and locked component thereof, depression bar and draw-gear thereof and pedestal.Two stationary knifes are set on pedestal bottom plate.Between the portion of stationary knife limit, spacer block is set.At stationary knife arranged outside locked component, wherein the plug piece is fixed on pedestal bottom plate limit portion, adjusts piece and is close to the stationary knife side, and the clamping block with two inclined-planes is clipped between the two by the securing member locking that links to each other with pedestal bottom plate.Bevelled depression bar is positioned at correspondence top, the long limit of stationary knife, and the cylinder that links to each other with one end traction is moved its both ends in the cinclides of pedestal wall.Moving knife with boss and U-shaped opening moves up and down between stationary knife under cylinder supports drives.Before the shearing, bar is located in the half slot of stationary knife, and depression bar is pressed in growing on the corresponding position, limit with stationary knife of bar upper surface, and the U-shaped opening of moving knife rides on the bar.Exert pressure when shearing on press ram is pressed in the boss of moving knife, because moving knife is sheared between two stationary knifes, once pressurization obtains two blanks.

The utility model is compared with prior art, owing to adopt blocks compound mode, the processing simple in structure, easy of this shearing die.Because stationary knife is fixed by the inclined-plane locked component, bar is being pressed by inclined-plane locking depression bar, and bar can bear the sharp pounding of shearing equipment generations such as forcing press.Because once pressurization can access two blanks, this shearing die doubles production efficiency.

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is the vertical view of a specific embodiment of the utility model bar accurate shearing mould.

Fig. 2 is the cutaway view along A-A line among Fig. 1.

Fig. 3 is the cutaway view along B-B line among Fig. 1.

As shown in Figure 1 and Figure 2, spacer block 3a, 3b place between stationary knife 2a, the 2b limit portion, and they surround the space that can supply moving knife 1 to move up and down jointly, so that moving knife 1 shearing blanking.Stationary knife 2a, the 2b outside is provided with locked component, and this assembly is by adjusting piece 4a, 4b, clamping block 5a, 5b, and plug piece 6a, 6b are close to formation in proper order by their inclined-plane.Plug piece 6a, 6b are fastened on by bolt 10 on the base plate of pedestal 8, and it surrounds die box jointly as the wall 11 of plug and pedestal, move outward to stop its inner member.Leave cavity between the bottom surface of clamping block 5a, 5b and pedestal bottom plate,, thereby adjustment piece 4a, 4b can be moved horizontally, and then make moving knife 1 and the gap of stationary knife 2a, 2b obtain adjusting so that clamping block moves up and down.Tighting a bolt 12 is compressed in clamping block 5a, 5b to adjust between piece 4a, 4b and plug piece 6a, the 6b, and all cuttves, piece are installed to adjust and finished.

As Fig. 2, shown in Figure 3, bar 9 is located in the half slot 13 of stationary knife 2a, 2b, depression bar 7a, 7b be pressed in bar with corresponding position, position, the long limit of stationary knife.Referring to Fig. 1, under the driving of cylinder 15, the two ends of depression bar 7a, 7b can be moved in the cinclides 16 of pedestal wall, utilize its middle part inclined-plane 14 progressively bar 9 is compressed till.

Shown in accompanying drawing 1,2,3, cylinder 17 is supporting the boss cantilever beam of moving knife 1, and moving knife 1 can be slided up and down between stationary knife 2a, 2b stably, makes the U-shaped opening of moving knife 1 be close to the upper surface of bar 9.Force moving knife to move down distance when surpassing the bar diameter when press ram 18 moves down, finish shearing.Once shear two blanks, billet position as shown in Figure 2, land in stationary knife 2b lastblock blank, another compact material cavity and pedestal bottom plate hole under moving knife.

Cylinder 15 backhauls make depression bar 7a, 7b unclamp bar.Cylinder 17 pushing tows make moving knife 1 get back to original position.Can advance bar to shear once more again this moment.

Claims (1)

1, a kind of bar accurate shearing mould is made up of moving knife and bracing or strutting arrangement, stationary knife and locked component thereof, depression bar and draw-gear thereof and pedestal, it is characterized in that:

A, stationary knife (2a, 2b) is set on pedestal (8) base plate, spacer block (3a, 3b) is set between the portion of stationary knife limit,

B, at stationary knife arranged outside locked component, wherein plug piece (6a, 6b) is fixed on pedestal bottom plate limit portion, adjust piece (4a, 4b) and be close to the stationary knife side, the clamping block (5a, 5b) with two inclined-planes is clipped between the two by the securing member locking that links to each other with pedestal bottom plate

C, have inclined-plane depression bar (7a, 7b) to be positioned at correspondence top, the long limit of stationary knife (2a, 2b), the cylinder (15) that links to each other with one end traction makes its both ends mobile in the cinclides (16) of pedestal wall,

D, the moving knife (1) with boss and U-shaped opening can move up and down between stationary knife (2a, 2b) under cylinder (17) supporting drive.

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