SU1303290A1 - 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 engineering enterprises for cutting bar material. The purpose of the invention is to improve the quality of blanks cut on the stamp. In the lower part of the stamp there is a roller guide 22 consisting of 2S of three pairs of rollers 23 of different diameters with an increase in the diameter in the direction of movement of the cut piece. The rollers 23 are rotatably mounted and serve to roll up defects on the end surfaces of the blanks being cut. On the movable knife-punch 5, a roller guide 24 is installed, consisting of three pairs of rollers 25, with a decrease in the diameter of the rollers in the direction of movement of the movable knife-punch 5. The rollers 25 are rotatably mounted and serve for cleaning and rolling defects on the end surfaces blanks clamped in semi-sleeve knives. When moving the knife punch 5, the workpiece is separated and the ends of the cut pieces are rolled up. 1 hp f-ly, 2 ill. 7 g4 Yu a B (L p figure 1

Description

The invention relates to the processing of metals by pressure and can be used in engineering enterprises for cutting bar material.

The purpose of the invention is to improve the quality of the blanks cut on the stamp.

1 shows a die for cutting bar material, a general view; figure 2 - section aa in figure 1.

A stamp for cutting bar material contains a bed 1 and sleeve knives consisting of lower 2 and upper 3 half-sleeves with wedge projections 4 and located on both sides of the knife-punch 5. Spacing L Lj L, Wedge lugs on the lower and upper half-sleeves are used to create voltage concentrators in the cutting plane. In addition, the wedge protrusions on the semi-sleeves, when inserted into the workpiece, create a stressful state of compression in the material of the bar being cut. The knife punch 5 is fixed on the top plate 6 by means of a pin 7 and a prussine washer 8. Guiding columns 9 and springs 10 serve to clamp the bar 11 in the lower 2 and upper 3 semi-sleeves and insert the wedge 4 into the bar. The guide columns 12 and the springs 13 mounted on the top plate 6 and the slider 14c are wedge-shaped

surface serve to with the 35 punch 5 down.

The stamp for cutting bar material works as follows.

When you turn on the press on the working stroke, the bar 11 is clamped to the bottom

interactions with the lower 2 and upper 3 half sleeves and moving them with the clamped rod 11 provide a zero gap between the lower 2 and upper 3 half sleeves and the movable knife, 40 of them 2 and the upper 3 half sleeves, with a punch 5. Limiter 15 (on the surface the rod is applied, as if) with a length Lj equal to the length of the cut piece, designed to prevent seizure under 45

vizny knife-punch 5 with the axial movement of semi-sleeves 2 and 3. A vertically located wedge pair, interacting with the bottom and upper races for local thinning of the rod in the plane of; The first blank from the bar is retracted, set without a stress concentrator in the plane of the cut, and during all subsequent press strokes in the plane of the knife-stick, the pressure concentrators formed by the lower 2 and upper 3

grooves for local thinning of the bar. in the plane of re; for. The first blank from the bar is retracted, set without a stress concentrator in the plane of the cut, and during all subsequent press strokes in the plane of the knife-stick, the pressure concentrators formed by the lower 2 and upper 3

them by semi-sleeves, consists of a guide sleeve 16, fixed in a hundred-50 half-sleeve with the help of wedge wedge by means of bolts 17, and creep-downs 4. Slider 14 with a wedge turned 14 14 The guide sleeve 16 is made with a wedge surface, by hearing aids by means of springs 13, yush directions; their columns 12 and top plate 6 also set in motion. At the same time, 55 slider 14 interacts with the lower 2 and upper 3 half-sleeves, as a result of which compressive stresses arise in the bar being cut.

Lives for interacting with the slider 14 for moving the lower 2 and upper 3 half-sleeves, and also for guiding the feed of the workpiece. To jointly move the top 2 and bottom 3 along

pins 18 and springs 19

Submission of blanks is carried out using a stepper pusher with two pneumatic granules (not shown).

In the lower part of the frame 1, a recess is made, closed by a flange 20 having an inclined surface for rolling the cut billet of length L into the hopper. The flange 20 also serves to press through the support 21 of the lower roller guide 22 to the lower half bushes. The lower roller guide consists of three pairs of rollers 23 of different diameters with an increase in diameter in the direction of movement of the cut piece with a length Lj. The rollers 23 are hinged and pairwise interconnected, rotatably mounted and serve to roll up defects on the end surfaces of the cut billet of length Lj.

On the movable knife-punch 5, an upper roller guide 24 is installed, also consisting of three pairs of rollers 25 of different diameters with a decrease in the diameter of the rollers in the direction of movement of the movable knife-punch Z.Rroliki 25 are hinged and pairwise interconnected, mounted with the possibility of rotation and serve to roll up defects on the end surfaces of blanks clamped in half sleeves 2 and 3 when the knife is moving

The stamp for cutting bar material works as follows.

When the press is turned on at the working stroke, the rod 11 is clamped in the lower 2 and upper 3 half bushings, while on the surface of the rod are applied

these are 2 and the top 3 half bushes, while on the surface of the rod are applied

grooves for local thinning of the rod in the plane; The first blank from the bar is retracted, set without a stress concentrator in the plane of the cut, and during all subsequent press strokes in the plane of the knife-stick, the pressure concentrators formed by the lower 2 and upper 3

semi-bushings with the help of wedges 4. Slider 14 with a wedge

50 half sleeves with the help of wedges 4. Slider 14 with wedge

by means of springs 13, the Yush direction, and their columns 12 and the top plate 6 are also set in motion. At the same time, 55 slider 14 interacts with the lower 2 and upper 3 half-sleeves, as a result of which compressive stresses arise in the bar being cut.

cut. The limiter 15 prevents the knife-punch 5 between the bottom 2 and the top 3 half-sleeves, and also provides zero clearance between the knife-punch 5 and the half-sleeves 2 and 3. The workpiece is separated when the knife-punch 5 is moved according to a two-support scheme. With full separation, a billet of length L, which is under the knife-punch 5, rolled through the bottom guide 22, acquires good quality of the end surfaces.

The upper roller guide 24, mounted on the knife-punch 5, when moving down, rolls up the feeds of the billets clamped in half sleeves 2 and 3, eliminating macro- and microscopic irregularities. The billet is long and falls through the inclined chute into the container. The workpiece of length L4 is pushed out with the subsequent axial movement of the rod.

Claims (2)

1. Stamp for cutting bar material containing the top plate with a knife-punch, the bottom plate, as well as AOR fo }50 five ABOUT the same two stub knife, located on both sides relative to the knife-punch, each of which is formed by clamping and cutting semi-sleeves with notching elements, the first of which is connected to the upper plate, and the second is mounted on the lower plate, characterized in that the quality of the workpieces, it is equipped with a knife-punch movement limiter, means of pressing the stub blades to the punch knife, as well as two roller guides, each consisting of three pairs of rollers, each of which means The sleeve knives are pushed into the form of a wedge pair, one of the wedges of which is rigidly mounted on the bottom plate and the other connected to the top plate, one of the clips mounted on the knife punch, the other on the bottom plate. 2. Stamp POP.1, characterized in that the rollers in the guides are mounted with the possibility of rotation, the diameters of the rollers in the guide are different from one pair to the other. and are made with an increase in the opposite sides of the bar feed axis. Editor A. Ogar Compiled by Y. Filimonov Tehred M. Khodanych Order 1250/13 Circulation 976 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Proofreader M. Pojo