RU2395375C2 - Accessory for guillotine shears for cutting angles from rolled sheet - Google Patents

Abstract

FIELD: mechanics.

SUBSTANCE: invention relates to mechanical equipment for plastic working of metals, in particular to guides arranged on shears of guillotine type, and may be used to cut angles from rolled sheet. Accessory comprises guide installed on table of guillotine shears with the possibility of adjustment turn and displacement, and thrust. Thrust is arranged as replaceable, is fixed perpendicularly at the end of guide and is intended for strip end thrusting against it, limitation of its displacement and installation into required position. And guide is arranged with holes for fixation elements to fix guillotine shears on table in position adjusted for required size of cut angle.

EFFECT: design is simplified, efficiency is increased due to reduction in labour expenses for marking of angles.

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Description

The invention relates to mechanical equipment for metal forming, in particular to devices mounted on guillotine-type scissors, and can be used to cut corners from sheet metal.

Currently, the cutting of sheet material into rectangular strips (blanks) is carried out with mechanical scissors, for which they use guillotine shears, using the available stationary stops or guide rails included with the scissors. When cutting from corner strips, manual preliminary marking of these corners is required directly on each strip with the marking being set along the cut line of the guillotine shear knife. And in the case of mass production, marking the corner on each of the strips takes a lot of time, which reduces productivity. In addition, additional time is spent on precise alignment of the corners for marking directly on the guillotine shears.

A device in the form of an abutment for scissors for cutting sheet metal is known, comprising a limiter with drives mounted on the movable part of the scissors, and a catcher equipped with a roller with the possibility of interaction with a guide mounted on the housing of one of the drives, while the catcher is made in the form of a rotary shelf, articulated with a limiter (A.S. SU No. 1013141, IPC B23D 33/10 of December 28, 79, published on April 23, 83).

However, the device provides a segment of strips from sheet metal only of a rectangular shape, which limits its technological capabilities. This is due to the fact that the separate drives are fixedly mounted on one part, which is the movable part of the scissors, as a result of which they have one single position and cannot change it relative to each other. Therefore, the limiter interacting with separate drives can move directly along the drives themselves. In addition, each drive is additionally equipped with individual indicators, indicating the need to simultaneously achieve on each of them the same initial size of the cut strip. In addition, the movable part is moved relative to the stationary part of the knife only in a vertical plane to ensure that the rolled sheet is cut into strips. Therefore, the drives mounted on the movable part can only move in a vertical plane. The presence of additional elements in the form of a catcher with a roller and a guide, as well as control units and displacement sensors complicates the design of the device as a whole.

The closest technical solution, selected as a prototype, is a device for manufacturing products such as kerchiefs for sharp strip rolling, containing a guide bar mounted on the table of guillotine shears with the possibility of adjustment turning and moving, and emphasis (A.S. SU No. 1031657 A, IPC B23D 33/10, priority dated 12.29.1981, published on 07.30.1983).

A disadvantage of the known device is the complexity of this design, equipped with an additional adjustable emphasis in the form of a beam, connected with the carrier beam and requiring for its adjustment the presence of additional working elements on the rods, as well as latches, rulers, pointers. To configure this design, considerable time is required for its readjustment under a segment of corners of different sizes, which reduces the performance of the device.

The technical task of this invention is to simplify the design of the device while increasing productivity by reducing labor costs for marking corners.

To solve the problem in adaptation to guillotine shears for cutting corners from a strip of sheet metal containing a guide mounted on the table of the guillotine shears with the ability to adjust rotation and movement, and the emphasis, while the emphasis is removable, fixed perpendicular to the end of the guide and is designed to abut the end of the strip into it, restrictions on its movement and installation in the required position, and the guide is made with holes for fasteners for fixing the guillotine n on the table Reaper adjusted in a desired size of the cut corner position.

Using the proposed design of the device allows you to configure it on a segment of corners or bevels from strips of sheet metal without first marking them on each strip and reconciling on the table with guillotine shears, except for one, resulting in significantly increased productivity. This is achieved by the fact that after cutting the sheets into strips of rectangular shape or individual blanks on only one of the strips, mark the corner, set the line for marking the corner along the cut line of the knife on the guillotine shears table, and already set the guide with emphasis on the exposed position of the strip on the table on the table of guillotine shears. Cutting of subsequent corners of a given size from a batch of strips is carried out without marking the corners by moving each subsequent strip along the guide and abutting the end of the strip in a removable stop, which leads to the restriction of its movement and at the same time to the installation of the strip in the desired position. When cutting corners of another standard size, the marking of one corner on the strip is likewise made and the guide is adjusted to the segment of the corresponding corner with its subsequent fixing on the guillotine shears table. The cut-off of corners from a batch of strips of a given size is carried out similarly by setting each strip along the guide until it stops against the end of each subsequent strip.

The execution of the guide with holes for fasteners provides the possibility of quick readjustment of the guide by changing the angle of rotation of the guide, moving it on the table along the guillotine shears, as well as changing the stop depending on the size of the cut corner, and then securing it in an adjusted position on the table of the guillotine shears by means of fasteners elements on the table of guillotine shears, which significantly reduces the time for readjustment of the device for the installation of strips with other sizes.

The implementation of the emphasis interchangeable allows you to cut corners of various sizes, which can improve productivity while reducing the time for readjustment.

The accompanying drawings explain the essence of the invention.

Figure 1 shows a General view of the device for marking and pieces of corners from strips of sheet metal, axonometry;

figure 2 shows the fastening of the device on the table of the guillotine shears for cutting corners from the strips, top view;

figure 3 shows the location of sheet metal relative to the device for cutting corners of another standard size;

figure 4 shows the location of the strip when cutting corners from two sides.

The adaptation to guillotine shears for cutting corners from sheet metal consists of a guide 1, on the end of which a removable stop 2 is fixed perpendicularly (Fig. 1). The stop 2 serves to abut the end of the strip into it, limit its movement and set it to the required position, necessary for the corners to be cut from them. Through holes 1 are made on the guide 1. Guide 1 is mounted in the grooves 4 on the table 5 of the guillotine shears by means of bolts 6 installed in the holes 3 (Figs. 2-4). For sections from strip 7 of corner 8 of the required size, several interchangeable stops of 2 different sizes are available. The change of emphasis 2 is made by a bolt 9 (Fig.1-2). Depending on the size of the strips 7 and the cut corner 8, the slope of the guide 1 is adjusted or it is transversely moved on the table 5 relative to the cut line 10, along which a segment of the corners 8 is made using a movable guillotine shears knife (not shown). Cutting corners 8 is possible both on one side of the strip 7, and on the other after its reinstallation (figure 4).

The device works as follows.

After cutting sheet metal into strips (blanks) 7 of the required size on one of the strips 7 manually mark the corner 8, which must be cut. The strip 7 with the marked corner 8 is placed on the table and reconcile the marking line with the cut line 10 of the knife. Then the guide 1 is placed on the table 5 guillotine shears and set it so that the guide 1 is located along the strip 7, and the emphasis 2 rests on the end of the strip 7, but he should not go beyond the cut line 10. The adjusted position of the guide 1 is fixed on the table with 5 bolts 6 through the holes 3 in the grooves 4. Make a segment of the corner 8 in the configured mode by means of a movable knife of the guillotine shears, which is attached to the knife beam, moving vertically and equipped with a clamping beam, pressing the strip 7 to the table 5 pr segment (not shown). The following strips do not require marking the corners, since the guide 1 is already configured and fixed to a segment of a corner of a given size. Each strip 7 of this size is alternately installed along the guide 1 until the end of the strip abuts against the stop 2. In this case, the dimensions of the corner 8 will be maintained and the cut line will be installed on the segment of the corner 8 of the required size without marking. For pieces of corners of a different size, similarly also on one strip 7 mark this corner, set strip 7 along the guide 1 until the end of the strip abuts against the stop 2 and combine the marking line of corner 8 with the cut line 10 of the knife. Then the guide 1 is set under the marking of the corner 8 of a different size. To do this, loosen the bolts 6, change the position of the guide 1 by changing the angle of rotation or moving it on the table 5 and then securing it with bolts 6. The closer the guide 1 is fixed to the cut line 10, the larger the cut corner 8 is, and vice versa. For pieces of corners 8, for example, large sizes, the corresponding stops 2 are used, i.e. the dimensions of the stops 2 depend on the sizes of the strips 7 and the cut corners 8. The stop 2 is replaced with a bolt 9. This device provides a cut of the corners on both sides of the strip 7. To do this, after cutting the corners 8, the strip 7 is turned over, placing it along the guide 1 to the stop 2 with subsequent similar adjustment of the guide for marking the second corner on one of the bands 7.

This ensures fast and accurate strip orientation to the desired position for the corners of the required size, which positively affects the performance of the work. The device has a simple design and does not require a significant investment of time for its readjustment to a given size.

Claims (1)

A device for guillotine shears for cutting corners from a strip of sheet metal, containing a guide mounted on the table of the guillotine shears with the possibility of adjustment turning and moving, and an emphasis, characterized in that the emphasis is removable, fixed perpendicular to the end of the guide and is intended to abut the end face strip, restrictions on its movement and installation in the desired position, and the guide is made with holes for fasteners for fixing on the table the guillotine shears are adjusted Mr. under the required size of the cut-off corner position.

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