UA76981U - Double side trimming shears - Google Patents

Abstract

Double side trimming shears comprises left and right frames, in each of which there are located a trimming unit of longitudinal cutting in the form of a lower blade secured on the frame and a drive cutting beam connected to crank shafts with upper blade with a curved cutting edge and a scrap cutting unit of transverse cutting in the form of a fixed lower blade mounted on the frame and upper blade mounted on a support placed between the wedges of frame with possibility of reciprocal movement along the guides. Each scrap cutting unit is equipped with an additional set of blades positioned at a predetermined distance from the main blades of transverse cutting, and the upper blade is mounted on said drive support, and the lower blade is rigidly attached to the frame, in addition, each of the frames is equipped with a pair of drive and pressure rollers located in the same plane and placed between the trimming and scrap cutting units of shears.

Description

The useful model belongs to the field of metallurgical engineering and can be used in the cutting line of rolling mills as a device intended for longitudinal cutting of the edge of metal sheets and crushing of the obtained scraps and their subsequent remelting in the technological line.

Known scissors for cutting sheet material in the longitudinal direction (author's certificate Mo 984734, IPC B230 31/04). The scissors include a frame on which the lower rectilinear knife is immovably fixed, drive eccentric shafts connected to the upper knife beam, on which the curved knife is fixed.

Such scissors work as follows. When the eccentric shafts rotate, the upper knife beam with a curved knife begins to move and cuts into the sheet, and the sheet is cut by rolling along the lower straight knife. With further rotation of the eccentric shafts, the upper knife beam rises, the knife leaves the body of the sheet and it is fed to the next cut of its edge.

Among the shortcomings of known scissors should be attributed the absence of cross-cutting shears in the complex of edge-cutting shears for shredding the cut longitudinal edge of the sheet.

There are also other scissors that are structurally closer to the proposed solution and which are accepted as a prototype under patent PA57380 (MPK B23031/04, B23015/06). The shears consist of the right and left frames, which are installed symmetrically about the axis of the scissors, a pair of driven edge-cutting knives and a pair of driven edge-cutting knives installed in each of the frames. In each of the latter, there is a mechanism for adjusting the side gap of edge-cutting knives and a mechanism for adjusting the side gap of edge-cutting knives. At the same time, the upper wing knife is fixed in the caliper, which is articulated with the connecting rod, the free end of which is located on the eccentric shaft. On both sides of the connecting rod there are two arms of the rocker arm. Each end of the rocker arm is connected to a movable wedge, which in turn contacts the corresponding wedge surfaces attached to the frame.

Double edge-cutting scissors work as follows. After leaving the rolling mill, the rolled steel sheet enters the traction rollers. The sensor of the traction rollers sends a signal to the control system to turn on the drive for adjusting the lateral gap of the edge-cutting knives on the right and left to set the required side gap between the edge-cutting knives

With knives, and the lateral gap between the edge-shrinking knives is set by the drive for adjusting it by turning the thrust manually. After installing the lateral gaps between the knives, the traction rollers feed the sheet into the area of the edge-cutting knives, where both longitudinal edges are trimmed and the resulting scraps are chopped with edge-shredder knives. Next, the sheet is moved one more step and another cut is made again.

Compared to the analogue, the prototype has an edge-shrinking unit, which allows you to shred the edge of the sheet into measured pieces during the longitudinal cutting process.

However, due to the insufficient degree of grinding of the obtained scraps, the capacity of the furnaces for remelting the obtained scraps decreases in the future.

Thus, the disadvantage of the prototype is the insufficient degree of shredding of scraps into measurable pieces.

The purpose of the useful model is to increase the efficiency of grinding the cut edge of the sheet material.

This problem is solved due to the technical result, which consists in increasing the degree of grinding of the cut edge.

To achieve the specified technical result in double edge-cutting shears containing left and right frames, each of which has a longitudinal cutting edge-cutting unit in the form of a lower knife fixed on the frame and connected to the crank shafts of a drive knife beam with an upper knife with a curved cutting edge and a cross-cutting edge leaf assembly in the form of a stationary lower knife installed on the bed and an upper knife mounted on a caliper, placed between the wedges of the bed with the possibility of reciprocating movement along the guides, according to a useful model, each edge leaf assembly is equipped with an additional set of knives located at a given distance from the main cross-cutting knives, while the upper one of the knives is mounted on the above-mentioned drive caliper, and the lower one is immovably fixed on the bed, in addition, each of the beds is equipped with a pair of drive and pressure rollers, which are placed in the same plane and installed between k frame-cutting and edge-shrinking scissor assemblies.

As a result of the comparative analysis of the proposed technical solution and the prototype, common features were revealed: 60 - right and left bed frames;

- edge-cutting unit of longitudinal cutting in the form of a lower knife fixed on the bed and connected to the crank shafts of a drive knife beam with an upper knife with a curved cutting edge; - cross-cutting edge leaf unit in the form of a stationary lower knife installed on the frame and an upper knife mounted on a caliper placed between the wedges of the frame with the possibility of reciprocating movement along the guides; and distinguishing features: - each edge wing unit is equipped with an additional set of knives located at a given distance from the main cross-cutting knives; - the upper additional knife is installed on the drive caliper; - the lower additional knife is immovably fixed on the bed; - each of the frames is equipped with a pair of drive and pressure rollers placed in the same plane and installed between the edge-cutting and edge-spreading nodes of the scissors.

Due to the fact that each edge-cutter assembly is equipped with an additional set of knives located at a given distance from the main cross-cutting knives, while the upper of the knives is installed on the above-mentioned drive caliper, and the lower one is immovably fixed on the bed, it became possible to ensure the required specified degree of grinding of the cut edge of sheet material, making two cuts with one actuation of the caliper of the edging shears.

Due to the fact that each of the frames is equipped with a pair of drive and pressure rollers, located in the same plane and installed between the edge-cutting and edge-folding nodes of the scissors, it became possible to ensure the feed of the last cut end of the edge into the edge-folding node, the length of which is less than its feed value.

The technical solution claimed is not known from the prior art, therefore it is novel.

The technical solution that is claimed is industrially applied, and its production in the conditions and on the equipment of the NKMZ is possible. A working project has been developed for the state of 2800 h.p. Ashinsky

MK (Russia).

The technical solution that is claimed is explained by the drawings, which show the following: fig. 1 - general view;

From fig. 2 - section A - A in fig. 1,

Double edge-cutting scissors consist of the following basic components: left frame 1, right frame 2, and right frame 2 differs from left frame 1 in that it is structurally made mirror-like with the possibility of movement by the horizontal movement mechanism Z along guides 4. In each of frames 1 and 2 includes a longitudinal cutting edge-cutting unit and a cross-cutting edge-cutting unit. The edge-cutting unit of longitudinal cutting is made in the form of a lower knife 5 fixed on the frame and a drive knife beam 8 connected to eccentric shafts 6 and 7 with an upper knife 9 with a curved cutting edge 10. knife 11 and an additional lower knife 12, as well as the first upper knife 13 and an additional upper knife 14. An additional set of knives 12 and 14 is installed at a given distance (for example, I) from the knives 11 and 13. The upper knives 13 and 14 are fixed on the drive caliper 15 , connected to the eccentric shaft 16. The value of I determines the specified length of the cut edge of the sheet material to be broken into measured pieces.

The caliper 15 is placed between the wedges 17 and 18 of the bed with the possibility of reciprocating movement along the corresponding wedge surfaces, which serve as guides for the caliper 15.

Wedges 17 and 18, as well as the rocker arm 19, with which they are connected, are links of the mechanism for adjusting the lateral clearance of the upper wing blades 13 and 14 relative to the lower fixed wing blades 11 and 12.

Each of the frames 1 and 2 is equipped with a pair of drive 20 and pressure rollers 21, the vertical axes of which are placed in the same plane and installed in the area between the edge-cutting and edge-shrinking nodes of the scissors. Rollers 20 and 21 ensure the feed of the remaining end of the cutting, the length of which is less than the feed value.

Double edge-cutting scissors work as follows.

Before starting work, depending on the width of the rolled sheet, move the right frame 2 to its installation on the required sheet size. When the rolling stock is fed to the traction rollers, the sensor (not shown in the drawing), which measures the thickness of the rolling stock, sends a signal to the scissor control system to turn on the drive (not shown in the drawing) to turn the rocker arm 19 around its axis, as a result of which the wedges 17 and 18 move together with the caliper 15 placed between them, which holds the upper edge-cutting knives 13 and 14. As a result of this, the necessary lateral clearance is established between the main pair of edge-cutting knives 11 and 13 and the additional pair of edge-cutting knives 12 and 14. After the rolled product is fed into the cutting zone, first cutting the longitudinal edges of the rolled product with the help of a stationary knife 5, which rolls along the cutting edge of the knife 9, kinematically connected to the eccentric shafts 6 and 7. After that, due to the rotation of the eccentric shaft 16, the support 15 with the knives 13 and 14 is lowered onto the sheet, as a result what happens when shredding leaves. At the same time, by equipping the right and left bed with rollers 20 and 21, guaranteed grinding of the last remaining end of the scrap from the sheet is ensured due to its feeding into the cutting zone, even if its length is less than the feeding value.

From all of the above, it is clear that the execution of double edge-cutting scissors according to the formula of the useful model will allow to increase the degree of shredding of scraps, to increase the efficiency of shredding of the trimmed edge of sheet material, which will subsequently create conditions for improving the capacity of the melting equipment.

Claims (3)

USEFUL MODEL FORMULA Double edge-cutting shears, containing left and right frames, each of which has a longitudinal cutting edge-cutting assembly in the form of a lower knife fixed on the frame and connected to the crank shafts of the driving knife beam with an upper knife with a curved cutting edge and an edge-cutting assembly transverse cutting in the form of a stationary lower knife installed on the bed and an upper knife mounted on a caliper, placed between the wedges of the bed with the possibility of reciprocating movement along the guides, which differ in that each edge wing unit is equipped with an additional set of knives located at a given distance from the main cross-cutting knives, while the upper one of the knives is mounted on the above-mentioned drive caliper, and the lower one is immovably fixed on the bed, in addition, each of the beds is equipped with a pair of drive and pressure rollers, which are located in the same plane and are installed between the edger and the edger them with knots of scissors. pi TI DS en z chini shi shih she s. Shh shh | ! m Shy KE. with V and them: m a Z Dan Z i "ZHEK Z YZHE Z 3. With KK oon chnu I se y i she kohkhkkkkkhket she sce y NK KO EK dreaming po Va Mne sosen V a: an: nyn a Sy ssh neon ay sce y shi ny ee ov, a: oo A y siy Fk; WITH