SU965639A1 - Die for cutting rolled stock - Google Patents

Description

(54) STAMP FOR CUTTING ROLLS

one

The invention relates to the processing of metals by pressure, and more specifically to the design of dies for cutting rolled products by the wasteless method according to the two-support scheme.

A stamp is known for cutting rolled products into workpieces containing a frame, a punch knife, stationary semi-sleeve knives mounted on a frame, clamping semi-sleeves located above the stationary semi-sleeve knives, and placed on both sides of the pre-cut knife 1 and cutting elements for preliminary notching 1 .

The disadvantage of the design is that local thinning of the workpiece (stress concentrator) is applied before the cutting process of the workpiece occurs, due to which a mismatch between the lines of the concentrator and the cutting edges of the punch is possible. The workpiece clamp has only a local character, which does not provide a sufficient clamping force in the immediate cutting zone, and its clamping and cutting is designed for a specific size of the blank.

The purpose of the invention is to improve the quality of the resulting blanks.

The goal is achieved by the fact that in the die for cutting rolled products into blanks.

containing, bed, knife-punch, stationary semi-sleeve knives mounted on the bed, clamping half-sleeves located above the stationary semi-sleeve buttons and placed on both sides of the knife-punch, and the cutting elements for preliminary notching, the latter in the form of protrusions on the end surfaces clamping semi-sleeves and are located in planes that coincide with the cutting surfaces of the punch knife.

ten

FIG. 1 shows a stamp, section; in fig. 2 shows section A-A in FIG. one; in fig. 3 - node I.

Stamp for cutting rolled contains a frame 1, fixed on it fixed

Claims (1)

15 semi-sleeve knives 2, clamping half-sleeves 3 located on both sides of the knife-punch 4 installed in the punch holder 5, cutting elements 6 made in the form of protrusions in the end surfaces of the clamping half-sleeve 3, adjustable stop 7 for getting one piece of a given length C and guide sleeves 8, the position of which corresponds to the length L of the other blank. The stamp works as follows. When the machine is turned on to the working stroke, the guide sleeves 8 serve to expand the size range of the cut blanks, the blank is fed to the stop 7 (blank not shown) and the blank is clamped with semi-sleeve knives and clips 2 and 3, respectively. At the same time, V-shaped grooves are applied on the surface of the workpiece in the place of cutting by cutting elements 6. The knife-punch 4, installed in the punch holder 5, is set in motion under the action of a dynamic load and a piece of blanks occurs. A billet of length L falls down and enters the container along an inclined chute. The return of the knife-punch 4 to its initial position occurs along the reverse path: the stop 7 is removed, the workpiece is released and fed further, pushing out the workpiece of length котора which also falls into the container. Then the duty cycle is repeated. The proposed stamp for cutting rolled products into blanks ensures waste-free cutting and reduces the labor intensity of subsequent machining of the blanks by increasing the quality of the resulting blanks. Claims of the Invention Stamp for cutting rolled stock into blanks comprising a bed, a punch knife, stationary semi-sleeve knives mounted on a bed, clamping semi-sleeves located above the fixed semi-sleeve knives and placed on both sides of the preliminary notch, characterized by that, in order to improve the quality of the obtained blanks, the cutting elements for preliminary notching are made in the form of protrusions on the end surfaces of the clamping half-sleeves and are located in planes, adayuschih the cutting-surfaces of the punch knife. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 557884, cl. In 23 D 23/00, 1975 (prototype).