CN2146316Y

CN2146316Y - Multi-edge rectangular cutter for hand scissors

Info

Publication number: CN2146316Y
Application number: CN 91229469
Authority: CN
Inventors: 庄广富; 席渤立
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-11-30
Filing date: 1991-11-30
Publication date: 1993-11-17
Anticipated expiration: 2001-11-30

Abstract

The utility model relates to a multi-edge rectangular cutter for a hand scissor, which is used for processing shaped cutting and holes to sheet metal, comprising an upper part and a lower part. An edge is a rectangle and annular; an upper knife is provided with six outer edge openings which are respectively a front edge 2, a rear edge 8, two main hem edges 3 and two secondary hem edges 7, wherein, the cutting angles of the front edge 2 and the rear edge 8 are all 75 DEG; the cutting angles of the two main hem edges 3 and the secondary hem edges 7 are all 90 DEG; a lower knife is a 10*60 mm rectangle with a flat and inward edge. The utility model can shear and cut complex shapes; notches are smooth, flat and trim, with little error and high precision.

Description

Multi-edge rectangular cutter for hand scissors

The utility model relates to and a kind ofly sheet metal is carried out abnormity cuts out the new-type cutter on the manual equipment of being used for irregularly-shaped hole processing.

At present the special-shaped sheet metal component production of single-piece and small lot still there is not desirable processing method.Machining deviations such as existing equipment and instrument dash as arranging, nibbling shear, hammer-shears are all bigger, the otch out-of-flatness, and sheet metal deformation is big, so the workpiece trim amount is big, and is time-consuming.Use numerical control press or mould stamping-out quality is good, speed is fast, but the production cost height, the preparation cycle is long, is difficult to promote the use of in small lot and single-piece production.

The purpose of this utility model provides a kind of novel multiple-cutting-edge rectangle cutter that is used on the manual punching equipment, it can cut the various complicated shapes of being made up of broken line (seeing accompanying drawing 1) easily on the sheet metal of 0.5-3MM, and otch is smooth smooth, workpiece does not have buckling deformation, error is little, precision is high, in single-piece and small lot batch manufacture, production efficiency is apparently higher than the said equipment and processing method, and saves material again, and is with low cost.

The utility model is achieved in that a kind of multiple-cutting-edge rectangle cutter of design, is installed in the lever hand and pulls and cut.Cutter is divided into two parts up and down, and cutting edge is a rectangular ring.Following cutter is horizontally fixed on hand and pulls on the support of cutting, and upper slitter is clamped on the drift and is in vertical reciprocating motion, and realizes punching.Upper slitter partly has 6 outer cutting edges: front edge, rear edge, two primary edges and two secondary swords.The upright projection of upper slitter part is a rectangle, and nominal size is 10 * 60MM.The cutting edge length of front edge and rear edge is 10MM, and cutting angle (being the angle of primary edge and preceding vertical plane and the angle of secondary sword and back vertical plane) all is 75 °, and the cutting angle of 4 limit swords all is 90 °.Following cutter partly is the flat inner cutter hole of rectangle of 10 * 60MM, and the cutting angle all is 90 °.Leave the punching gap up and down between the cutting edge of cutter.The front edge cutting angle of upper slitter part is got 75 °, and the one, the cutting force when reducing punching reduces equipment volume, reduces manufacturing cost.The 2nd, can begin punching at the plate any place, control kerf easily, the combination of the otch of a plurality of different directions can be formed various simple and complicated shape.The 3rd, can make primary edge have the scissors function, realize shearing continuously.Method is the otch that the first cutter punching goes out about 40MM, not chip breaking, upper slitter is lifted a little but front edge is not lifted away from plate, plate is advanced to the front edge direction, make curling bits material be close to the upper slitter bottom, then cut second cutter, prolong the about 40MM of otch, the bits material is derived by dregs guiding groove, and so forth, can shear until plate continuously and be blocked by barrier.Because cutter is a rectangle, parallel bilateral sword can lead, and makes otch smooth straight, does not have to connect stubble, no broken line.After the skilled operation, dimensional discrepancy can be controlled within the 0.2MM.Rear edge is chip breaking at any time, the control incision length.Owing to adopt bilateral sword to shear, the plate quilt beyond the material stress balance, cutting edge cutter two side portions is down held, and buckling deformation can not take place.When shearing big endoporus, it is still smooth to cut out heart material down, can continue use.

Below in conjunction with drawings and Examples the utility model is further specified.

The part abnormity legend that Fig. 1 is to use the utility model to process on sheet metal.

Fig. 2 is the front view of multiple-cutting-edge rectangle cutter embodiment.

Fig. 3 is I-I cutaway view of Fig. 2.

Fig. 4 is II-II cutaway view of Fig. 2.

Among the figure 1, dregs guiding groove 2, front edge 3, primary edge 4, upper slitter 5, preceding vertical plane 6, back vertical plane 7, secondary sword 8, rear edge 9, edge 10, cutter down down

In Fig. 1, be to use the example of the part abnormity shape that the utility model processes on sheet metal, ratio is 1:1.Dotted line is the metal reserve part, and blank is the metal removal part.

In embodiment illustrated in fig. 2, following cutter (10) is fixed on the support, upper slitter (4) but up-and-down movement, the work metal thin plate lies in down on the cutter (10), move downward upper slitter (4), at first be that front edge (2) pours thin plate, upper slitter (4) continues to move downward, and primary edge (3) promptly begins to shear.If shear continuously, before rear edge (8) is about to contact plate, lift upper slitter (4) and make front edge (2) not break away from plate, utilize the sidewall of two primary edges (3) to lead, plate is advanced to front edge (2) direction, make breach prop up front edge (2), once more upper slitter (4) is moved downward, can prolong otch, repeatable operation like this, promptly realize shearing continuously, and otch do not have broken line, do not have and connect stubble.If want chip breaking, just rear edge (8) is aimed at the chip breaking position, upper slitter is pressed to the end, the bits material can break.If will change cut-out direction, upper slitter (4) can be lifted, rotate plate, upper slitter (4) is aimed at new otch descend cutter again.

Fig. 3 is I-I cutaway view of Fig. 2.The upright projection of upper slitter (4) and following edge (9) is all rectangular, and nominal size all is 10 * 60MM, and the cutting edge periphery all leaves shear gap.

Claims

1, a kind of hand that can be easily cuts multiple complicated shape in the sheet metal upper punch is pulled and is cut with multiple-cutting-edge rectangle cutter, it is characterized in that being divided into two parts up and down, cutting edge is a rectangular ring, upper slitter (4) has six outer cutting edges, be respectively front edge (2), rear edge (8), two primary edges (3) and two secondary swords (7), the cutting angle of front edge (2) and rear edge (8) is 75 °, the cutting angle of two primary edges (3) and two secondary swords (7) all is 90 °, and following cutter (10) is the flat inner cutter hole of rectangle of 10 * 60mm.

2, multiple-cutting-edge rectangle cutter according to claim 1, the upright projection that it is characterized in that upper slitter (4) is the rectangle of 10 * 60mm.