SU1296321A1 - Die for cutting bar stock - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in the blank production of machine-building enterprises for cutting bar material. The purpose of the invention is to increase the quality of the resulting blanks. When moving the movable plate down the wedge 18 and 19, sliders 3 and 4 are driven with knives 6, 7 and clamps 14.15. in horizontal counter movement. At first, the rod is centered, 13 at the starting knives of the knives 6, 7, and then the knurling sections of the knives come into play with working lugs that rotate the bar and extrude the chamfer on it. During this cycle, the bar left with the clamps 14 and 15 unclamped. At the end of the chamfering step, the bar 13 is clamped between the knife 7 and the clamp 14, and as the plate is further lowered, the knives 6, 7, moving towards each other, are cut with their own cut-off sections 8 bar material on the cutting plane. 2 hp f-ly, 8 ill. i W

Description

The invention relates to the processing of metals by pressure and can be used in the blank production of machine-building enterprises for cutting bar material.

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

FIG. 1 shows a die for cutting bar material, a slit; in fig. 2 - the same position before cutting the workpiece; in fig. 3 shows section A-A in FIG. 2; in fig. 4 - position of the working parts of the stamp at the end of the process of cutting off the workpiece; in fig. 5 is a section BB in FIG. one; in fig. 6 is a view of B in FIG. five; in fig. 7- knife device; in fig. 8 - section G-Y in FIG. 7

The stamp for cutting bar material into blanks contains a fixed plate 1 with a guide 2 fixed on it, in which the sliders 3 and 4 are mounted with the possibility of horizontal counter-movement of the sliders 3 and 4 on different sides of the cut plane 5, knives 6 and 7 are installed. Each knife has a detachable 8, 9 knurled and 10 entry sections. In all areas of the knife, a working protrusion 11 is made to the depth of the required, chamfer of the cut-off workpiece 12 from the bar 13. In the notches of the sliders 3 and 4, clamps 14 and 15 are fixed opposite the knives 6 and 7 through buffer elements 16 and 17, which are made, for example, of polyurethane . Clamps 14 and 15 at the stage segments form with cutting sections 8 knives 6 and 7 a working contour of a cylindrical form-. The sliders 3 and 4 are driven by driving, wedges 18 and 19, mounted on the movable plate 20. On the side surface of the guide 2 of the fixed plate 1 at the inlet 21 for the rod 13 there is a guide device consisting of a rod 22 that is installed on axle 23 fixed on guide 2. Arm 22 is spring-loaded by spring 24 and cooperates with stop 25 fixed in guide 2. In arm 22, there is rotatably mounted sleeve 26, the hole of which corresponds to the diameter of bar 13. On the opposite side surface of the guide 2 by the output up responses

fO

f5

63212

27, an abutment 28 is fixed to the cut workpiece 12, limiting the bar feed in the axial direction.

The stamp works as follows.

The bar 13 is fed through the opening of the sleeve 26, the inlet 21 and the pin hole 27 of the guide 2 up to the stop 28. When the moving plate 20 is wedged down a wedge 18 and 19, the sliders 3 and 4 with the knives 6 and 7 and the clamps 14 and 15 in horizontal counter movement. First, the rod 13 is centered on the lead-in areas 10 of the knives 6 and 7, and then the knurling sections 9 of the knives come to work with the protrusions 11, which rotate the bar and extrude the chamfer on it. During this cycle, the bar remains unstressed clamps 14 and 15. At the end of the chamfering step, the bar 13 is clamped between the knife 7 and the clamp 15, and the workpiece 12 is cut between the knife 6 and the clamp 14, and with further lowering of the plate 20 the knives 6 and 7 When moving towards one another, with their cutting sections 8, the rod material along the cut plane 5 is cut.

After completing the cycle of pieces, plate 20 rises, and wedge 18

20

25

thirty

and 19, with their bevels and, the sliders 3 and 4 with knives 6 and 7 and clamps 14 and 15 are retracted to their original position. The workpiece 12 through the hole in the plate 1 and the press table (table not shown) falls down, and the spring-loaded lever 22 returns the bar 13 to the center of the stamp.

40

five

0

five

Claims (2)

1. A stamp for cutting bar material containing a fixed plate with guides and a guide sleeve, two knurling knives installed with the possibility of counter-reciprocating movement, two cutting blades, one of which is fixed on one of the knurling knives, and a mechanism for moving knurled knives, characterized in that, in order to improve the quality of the cut blanks, it is equipped with two sliders installed in the guides of the fixed plate, the rolling knives are located on both sides relative to the plane of single Not a rod and fixed on the sliders, The second cutting knife is attached to another knurled knife, each of which is made with a slider located on the side of the cutting knife of the opposite slider and is equipped with a clamp mounted in this cutout by means of a buffer element with a profile working surface that, when clamping with a suitable cutting knife, is a cylindrical caliber . 2. A stamp according to claim 1, characterized in that the transfer mechanism The knurling knives are made in the form of movable wedges. I 3, a stamp according to claim 1, characterized in that it is provided with a lever mounted on a fixed plate with the possibility of swinging in a plane perpendicular to the direction of feed of the rod material, and the guide sleeve is installed in said lever, wherein the lever is provided with a limiter of swing and spring-loaded to him. z .; FIG g 12 FIG. Video iie.5 TO jCiZL G 6 eleven Vaz.7 Editor T. Mitejko Compiled by Y. Filimonov Tehred A. Kravchuk Proofreader O. Lugov Order 703/16 Circulation 976 Subscription VNIIPI. State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. A / 5 Production and printing company, Uzhgorod, Proektna St., 4 fpu2.8