SU825284A1 - Die for cutting rolled stock - Google Patents

Description

The invention relates to the blank production of machine-building plants and can be used for cutting rolled products into blanks. A known stamp for cutting rolled steel on billets, comprising a housing mounted on the base with a stationary sleeve knife housed therein, a movable sleeve knife mounted in the upper plate, and a stop [1

Hire for cutting comes with a large distortion of the shape of the ends (defective ends) in the form of crushing the cross section into an oval, with burrs. The maximum size of the crumpled cross section of the defective end significantly exceeds the diameter of the rental, taking into account the positive tolerance. To ensure the free entry of such rolled products into the die for cutting, the diameters of the working openings of the sleeve knives are made according to the maximum size of the cross section of the defective end, i.e. thereby increasing the gap between the rolled products and the knife walls, which contributes to the bending of the cut part of the rolling during cutting and, as a result, reduces ka-. Cutting quality. .

The purpose of the invention is improving the quality of cutting of rolled products with defective ends.

This goal is achieved by the fact that the stamp for cutting rolled products into workpieces, comprising a housing mounted on the base with a fixed sleeve knife placed therein, a movable knife mounted in the upper plate, and an emphasis, is provided with an additional knife placed between the movable and fixed knives and a spring-loaded knife relative to the body having half-sleeve and sleeve cutting parts, and movable in the horizontal plane drive stops placed with the possibility of installation between the top plate, an additional knife and the bases Niemi poluvtulochnoy the diameter of the cutting part by the additional blade larger than the diameter of the cutting sleeve part.

In FIG. 1 shows a stamp at the time of cuts of the defective end of the rolled product, a longitudinal section through FIG. 2 - the same, at the time of completion of the pieces of the workpiece; the FIG. 3 is a section AA in FIG. 1.

'' The stamp for cutting rolled products contains a base (not shown), a housing 1 mounted on it, on which a fixed sleeve knife 2 and spring-loaded springs 3 have an additional knife 4, the working cavity of which consists of internal 5 and sleeve 6 cutting parts, and an emphasis 7 The stamp contains movable lower 8 and upper 9 bearings with individual drives 10 and 11 in the form of power cylinders. On the top plate 12 is attached a sleeve knife 13. For cutting into the stamp comes rolling 14 with a defective end 15.

The diameters of the working holes are unsuitable. of the movable sleeve knife 2 and the half-sleeve part 5 of the additional knife 4 are made according to the maximum cross-sectional dimension of the defective end 15 of the rolled product 14. The diameters of the working holes of the movable sleeve knife 13 and the sleeve part 6 of the additional knife 4 are made according to the maximum rolled diameter, i.e. with a minimum gap between the rental and the working hole of the knife.

The stamp works as follows.

Hire 14 is freely inserted with its defective end 15 into the stamp beyond the cutting plane of the stationary sleeve knife 2 to a temporary stop (not shown), the upper movable support 9 is located between the additional knife 4 and the upper plate 12, the movable lower support 8 is removed from under the additional knife 4 . When the press slider moves down, the upper plate 12 lowers the additional knife 4, which interacts with its half-sleeve part 5 with the fixed sleeve knife 2 and cuts off the defective front end 15 at the rental. · Springs 3 return the additional knife 4 to its original position. Then the rolling 14 'is supplied to the stop 7. At the command of the worker, the drive 11 retracts the movable upper support 9 and introduces a movable support under the' Additional knife 4 '

8, and the additional knife 4 later becomes a stationary knife when cutting, as it lies on the lower support 8, and the upper plate 12 does not reach it in its lower position. During the slide of the press, the movable sleeve knife 13 interacts with the sleeve part 6 of the additional knife 4 and cuts off a good quality workpiece. When in front of the cutting plane of the stationary sleeve knife 2 there remains a portion of rolled 14 with a rear defective end less than the length of the workpiece, at the command of a working or tracking device, the drive 11 introduces a movable upper support 9 and removes a movable lower support 8 from under the additional knife 4. During the press down from the rolled product 14, the rear defective end is cut off, which is pushed by the subsequent rolled product into the half-sleeve part 5 of the additional knife 4 and is completely removed from the stamp. Then, the stamp operation cycle is repeated.

The proposed stamp improves the quality of cutting of rolled products with defective ends.

Claims (1)

(54) STAMP FOR CUTTING A WELDING BLADE KNOB is larger than the diameter of the bushing cutting part. FIG. 1 shows a stamp at the time of cutting the defective end of a rental, a longitudinal section j; FIG. 2 is the same at the moment when the pieces of the workpiece in FIG. 3 are finished; 3 is a section A-A in FIG. 1. A stamp for cutting rolled products contains a base (not shown), a housing 1 mounted on it, on which a stationary stub blade knife 2 and an additional knife 4 spring-loaded with springs 3 are placed, the working cavity of which consists of the slurry-shell blade 5 and in the barrel 6 cutting parts, and an emphasis 7, The stamp contains movable lower 8 and upper 9 supports with individual drives 0 and 11 in the form of power cylinders. A stub knife 13 is attached to the upper plate 12. Rolled 14 with a defective end 15 is cut into a die. The diameters of the working holes of the stationary stub knife 2 and the half-sleeve part 5 of the additional knife 4 are made according to the maximum size of the cross section of the defective end 1 of rolled 14. The diameters of the working holes of the movable sleeve knife 3 and the sleeve part 6 of the additional knife 4 are made according to the maximum diameter of the rolled product, that is, with a minimum gap between the hire and the working hole of the knife. The stamp works as follows. The rental 14 is freely inserted by its defective end 15 into the stamp for the cutting plane of the stationary stub sleeve 2 to the temporary stop (not shown. The upper movable support 9 is between the additional knife 4 and the upper plate 12, the movable lower support 8 is extended from under the additional 4 When the press ram moves down, the top plate 12 lowers the additional knife 4, which interacts with its semi-sleeve part 5 with the stationary stub knife 2 and cuts the defective front end 15 for rolling. When the press reverses, the spring 3 returns t additional knife 4 to its original position. Then prk 14 is fed until it stops 7, According to the working driver, the drive 11 retracts the movable upper support 9 and inserts under the additional knife 4 the movable support 8, and the additional knife 4 later becomes a fixed knife when cutting as it lies on the bottom support 8, and the top plate 12 in its lower position does not reach it. When the press slide is in progress, the movable sleeve knife 13 interacts with the sleeve part 6 of the additional knife 4 and cuts off a good quality workpiece. When in front of the cutting plane of the stationary sleeve knife 2 there remains a part of the prokata 14 with a rear defective end less than the length of the workpiece, at the command of the working or follower device, the actuator 11 introduces the movable upper support 9 and removes the movable lower support 8, under During the press down from the rental 14, the rear defective end is cut off, which is pushed by the subsequent rolling into the half sleeve part 5 of the additional foot 4 and is removed from the die, then the work cycle of the die is repeated. The proposed stamp allows improving the quality of cutting rolled products with defective ends. Claim for cutting rolled steel into workpieces containing a housing mounted on a base with a fixed stitch knife placed in it, a movable stub knife installed in the top plate and an emphasis that in order to improve the quality of cutting of rolled products with defective ends, it is equipped with an additional knife placed between the movable and fixed blades and a semi-sleeve and a screw that is spring-loaded relative to the body cutter parts, and horizontally movable drive stops placed with the possibility of installation between the top plate, an additional knife and the base, while the diameter of the half-sleeve cutting part of the additional knife is larger than the diameter of the sleeve cutting part, Sources of information taken into account in examination 1 , USSR Author's Certificate No. 407669, class, B 23 B 23/00, 1972. / 2 AND (puf.1 (put. 2