RU2108190C1 - Die set for differential type forming of elongated forgings - Google Patents

Abstract

FIELD: plastic metal working, namely manufacture of net-size formed blanks. SUBSTANCE: drive-free power cylinder is mounted in upper plate of die set. Rod of said cylinder carries section secured to it with possibility of motion in guides mounted in upper supporting plate of die set. One insert of upper tool unit is secured to said section. Insert of die set has supporting surface for fixing said insert when blank is deformed by means of another insert. EFFECT: improved design. 1 dwg

Description

 The invention relates to the processing of metals by pressure, namely stamps for differential deformation, and can be used in the manufacture of precisely stamped blanks, for example compressor blades.

 Known stamp for the manufacture of long products, containing placed on the base of the housing and mounted in it forming part, made in the form of sequentially arranged along the length of the workpiece sections, including upper and lower die inserts. The stamp is equipped with movable cushions that are rigidly connected to the inserts and also located between the latter and the cogs with adapters with heating elements and heat-insulating gaskets, and the base has guides to accommodate the casing, equipped with a drive for moving a step equal to the distance between the sections, in each of which mounted power cylinders of the reciprocating motion [1].

 The disadvantage of the stamp is the high complexity of the stamp, due, in particular, to the presence of an individual drive in each section, due to the introduction of power cylinders reciprocating motion.

 Closest to the proposed invention is a stamp for differential stamping, comprising a base, a body, an upper support plate, a guide plate, an upper tool block made in the form of stamp inserts arranged in series along the length of the workpiece with their moving links made in the form of two-link mechanisms and hinges. The links pivotally connected with the die inserts are made with shoulders, at the ends of which there are sliders installed with the possibility of movement in the vertical guide grooves of the guide plate, made cylindrical in its lower part, and the lower tool block [2].

 The disadvantages of this stamp are its high complexity, due, in particular, to the presence of two-link mechanisms and an upper guide body, as well as low reliability due to the rapid wear of the guide-crawler pair.

 The problem to which the invention is directed, is to simplify the design of the stamp by eliminating two-link mechanisms, the upper guide body and increasing the reliability of the device by eliminating wearing parts, crawlers and guide plates.

 This is achieved by the fact that the stamp for differential stamping of elongated forgings, comprising a lower base plate with a guide body and a lower die insert, an upper base plate bearing successive upper die inserts, differs from the prototype in that the non-drive plate is made in the upper base plate a power cylinder, on the rod of which a section is fixed with the possibility of its movement in the guides mounted on the upper base plate, one of the upper die plates is attached to the section inserts, and on it is made a supporting surface for interaction with the guide body.

 The drawing shows a schematic diagram of a stamp.

 The stamp contains the upper 1 and lower 2 base plates. In the upper plate 1, a power cylinder is made without an actuator with a liquid release valve 3, a liquid inlet valve 4, a piston 5 and a rod 6, to which section 7 is mounted with the possibility of movement in the guides 8 installed in the upper base plate 1. To section 7 and independent die inserts 9 and 10 are attached to the upper base plate 1. A supporting surface 11 is made on the insert 9. A lower guide body 12 is installed on the lower base plate 2, including the lower die insert 13. The initial blank 14 for stamping is placed in the die rytogo type formed by the lower die insert 13 and the lower guide body 12.

 The stamp works as follows.

 Heated to a stamping temperature, the cylindrical billet 14 is placed in the stream of the stamp. When moving the upper base plate 1 downward, the valves 3 of the outlet and the inlet 4 of the liquid are closed, movement is communicated through the liquid, the piston 5, the piston rod 6 of the cylinder, section 7 and directly from the upper base plate 1 to the stamp inserts 9 and 10. Stamp insert 9 in the initial state of the stamp located below the die insert 10 by the stroke of the rod 6 of the cylinder. Therefore, the insert 9 first comes into contact with the workpiece 14 and deforms part of it. The deformation of the part of the workpiece by the insert 9 continues until its supporting surface 11 touches the supporting surface of the lower guide body 12, while the fluid release valve 3 opens, the fluid is forced out of the cylinder, the insert 9 stops, and the cylinder rod 6 holds it in the lower position. The stamping insert 9 is stationary, the stamping insert 10, while continuing to move downward, comes into contact with part of the workpiece 14 and stamps the remaining part of the workpiece 14.

 When moving the upper base plate 1 up, the die insert 10, directly connected with the upper base plate 1, first moves up. When moving the upper base plate 1 upward, equal to the stroke of the cylinder rod 6, the gap between the lower end surface of the piston 5 of the cylinder and the surface of the cylinder is selected, the movement is communicated to the piston 5, cylinder rod 6, and section 7 moves progressively upward, entraining the die insert 9. The stamping inserts 9 and 10 exit the lower guide housing 12, move upward, while the liquid through the inlet valve 4 enters the cylinder from the filling tank (not shown).

 The stamped product is pushed out of the lower guide body 12 by the lower die insert 13, driven by a press ejector (not shown).

 The invention allows to simplify the design of the stamp and increase its reliability.

Sources of information
1.SU, Aut. St., 430932, B 21 J 13/02, 1974.

 2.SU, patent, 2056967, B 21 J 13/02, 1996.

Claims (1)

 A stamp for differential stamping of elongated forgings, comprising a lower base plate with a guide body and a lower die insert, an upper base plate bearing successive upper die inserts, characterized in that a non-drive power cylinder is made in the upper base plate, on whose rod is fixed section with the possibility of its movement in the guides mounted on the upper base plate, one of the upper die inserts is fixed to the section and the support surface for interaction with the guide body.