SU1530346A1 - Die for cutting roll-formed equal channels - Google Patents

Abstract

The invention relates to the stockpiling production of machine-building plants and can be used in the separation of bent equal-shelf channels. The purpose of the invention is to improve the quality of the products obtained. The stamp comprises a lower plate 1, on which two fixed semi-matrices 2 are installed, and an upper plate 3 with a sectional punch installed on it, consisting of a central stationary relative to the upper plate 3 section 4 with two equal inclined at an angle α to the vertical plane guide surfaces 5 and two side movable shells 6 and 7 mounted on these guide surfaces. In addition, the punch is provided with limiting movement of inserts made on one side in the form of end sections 8 on the central section 4, and on the other in the form of stop screws 9 installed in the side movable inserts 6 and 7, and grooves 10 made in the central stationary section 4. When the press crawl downwards, the liner 6 is right-cut the right shelf of the channel, then the liner 7 cuts the left channel of the channel. With further movement of the punch cuts the wall of the channel. 1 hp f-ly, 5 ill.

Description

The nozzles 5 and two lateral movable inserts 6 and 7 are mounted on these guide surfaces. In addition, the punch is provided with limiting movement of inserts, made on one side in the form of end sections 8 in the central section, and on the other in the form of stop screws 9 installed in the side movable

inserts 6 and 7, and 1U grooves pressed in the central stationary section i.-When the press ram goes down, it initially cuts the right shelf of the channel, the insert 6, and then the insert 7 cuts the left shelf of the channel. With further movement of the punch cuts the wall of the channel. 1 hp f-ly, 5 ill.

The invention relates to the processing of metals by pressure and can be used in the blank production of machine-building enterprises for the separation of bent equal-shelf channels.

The aim of the invention is to improve the quality of the products obtained.

Figure 1 shows a stamp for cutting channels in the initial position, general view, section; Fig. 2 is the same at the time when the cutting of the shelves is completed; fig. 3 - the same, at the time of the end of cutting of the channel wall; in fig. - section aa in figure 1; figure 5 - the contact of the liner with the wall and shelf of the channel.

A stamp for cutting curved equal-shelf channels contains the bottom plate 1, on which two fixed semi-matrices 2 are installed, and the top plate 3 with a sectional punch mounted on it, consisting of a central stationary relative to the top plate 3 sections with two equally angled at an angle oi . guiding surfaces 5 and two lateral movable inserts 6 and 7 mounted in these guides to the punch axis.

In addition, the punch is provided with lights made on the one hand in the form of face sections 8 on the central section M, and on the other in the form of lock screws 9 installed in the side movable inserts 6 and 7, and grooves 10 made in the central section. fixed section k according to these screws.

The angle oL of inclination of each guide surface 5 to the axis of the punch is determined from the expression

1g

. carcf.g--, t

0

five

0

five

0

five

0

five

where 1. - the length of the side cutting edge of the liner;

1 - the length of the lower cutting edge of the liner.

In the semi-matrix 2, the preform 11 is laid. In the initial position, the lateral movable inserts 6 and 7 are held by locking screws 9 and step 10, symmetrically with the arrangement of the preform 11.

When lowering the press slide (not shown), the side movable insert

6 comes into contact with the base

and the shelf of the workpiece 11, presses it against the wall of semi-matrix 2 and cuts a window in this shelf.

Then comes in contact with the workpiece 11 side movable liner

7i, displacing, presses it against the opposite wall of the semi-matrix 2.

The window is cut in the second shelf of the workpiece, after which the lateral movable inserts 6 and 7 abut against the end sections 8 of the central fixed section 4.

In this case, the bottom surfaces of all sections of the punch are in the same plane and a final cutting of the U-shaped profile takes place.

When the press ram moves upward, the side movable inserts 6 and 7 of the punch under the action of their own weight are displaced downward relative to the central fixed section and held by locking screws 9 in the grooves 10.

The blank 11 is fed to the next step and the cycle is repeated.

Claims (2)

1. A stamp for cutting bent equal-shelf channels containing fixed semi-matrix located on the bottom plate and a punch with a cutting edge mounted on the upper 51 The slab is characterized in that, in order to improve the quality of the products obtained, the punch is made with side guiding surfaces which are unequally inclined to its axis and provided with two inserts in the shape of a right-angled triangle with cutting edges on smaller sides mounted with the possibility of their large sides with said guide surfaces, wherein the punch is provided with upper and lower limiters for moving liners along guide surfaces, the punch axis is offset relative to the plane immetrii jaws in a plane perpendicular to the traveling direction of the cut channel, and the angle Proc. nahupona VZOZ b each punching guide surface of which axis is determined from the expression where 1 one oi arctg (l2 / l,), - the length of the side cutting edge of the liner;  - the length of the lower cutting edge of the liner. 2. Stamp lop.1, which differs from the fact that the upper limiter of movement of each liner is made as a protrusion on the punch, and the lower limiter is in the form of a locking screw attached to the inlet, and a counter groove made on it guide surface i., y. punch. .2 -AflvteffHyrno CX Fib. fie.Z fPul.l