SU1736665A1 - Machine for cutting wire and rod - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to devices for cutting rods, and makes it possible to increase the productivity and quality of cutting. The wire and bar cutting machine contains a bed 1, feed rollers 5, a fixed knife 4 and a faceplate flywheel with a movable knife 3. A guide 9 is mounted between the feed rollers and in the internal cavity of the fixed knife. The flywheel flywheel has two stops 10, 11, the stop 10 is set coaxially with the tubular guide, and the stop 11 has an angular displacement relative to the first stop in the cutting plane in the direction of rotation of the faceplate flywheel. The console part of the stop 11 is made elastic, and its end is in contact with the counter face of the faceplate-flywheel. When the machine operates, cutting of the wire and rods without kinks and chips on the cutting surfaces is provided, the resulting blanks have no deviations from the specified length. The machine is structurally simple and reliable. 1 hp f-ly, 5il. SO with

Description

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The invention relates to mechanical engineering, namely, to the blank production of mechanical engineering enterprises, and can be used to produce blanks by cutting wires and rods.

A known machine for cutting circular rolled section, which contains a frame, movable and fixed knives, feed mechanism, drive.

A disadvantage of the known technical solution is that when a wire or bar is fed freely without limiting bending devices and in the presence of axial compression, the feed material is curved, especially at the moment of bending its end into the emphasis limiting the length of the workpiece. This hinders the normal supply of material for cutting and reduces the quality of the cut blanks.

In addition, in the prior art, there is a special mechanism for pushing out the blanks, which complicates its design.

The machine is non-universal, as the resulting blanks correspond to only one size. All this taken together reduces the quality of cutting and the reliability of the well-known automaton.

Also known is an automatic machine for cutting round material, containing a frame, a face-flywheel mounted on the drive shaft, a knife mounted on it, a fixed knife mounted on the frame, a feed mechanism, an actuator.

However, in this well-known technical solution, in the process of cutting a bar or wire, bending deformations of them take place, which leads to a deterioration in the quality of cutting, and the productivity of the machine also decreases. In addition, the machine has a complex design of the movable knife and faceplate.

The purpose of the invention is to increase the productivity and quality of cutting.

The goal is achieved by those. that the machine, including a drive plate mounted on the bed with a fixed knife fixed on it, a fixed knife mounted on the bed, feed rollers, drive, is equipped with a tubular guide located between the feed rollers and in the inner cavity of the fixed knife, made in the form of a sleeve, on the frame are mounted on the opposite side from the trajectory of the knife and perpendicular to the plane of rotation of the faceplate two stops, one of which is mounted coaxially with the tubular guide stationary th knife and

the other has an angular displacement relative to the first in the plane of cutting in the direction of rotation of the faceplate, with the cantilever part of the second abutment being elastic, and

its end is in contact with the return face of the faceplate.

The end surface of the stop coaxially with the tubular fixed knife guide has a bevel of 0.5-5 °, reducing the distance between the cutting plane and the end surface of the stop in the direction of rotation of the faceplate.

The stop coaxial with the tubular guide of the fixed knife is adjustable in length.

FIG. 1 depicts the described automaton, side view, in a partial section; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a view along arrow B in FIG. 2; in fig. 4 — node I in FIG.

0 3; in fig. 5 — node II in FIG. 3

The cutting machine contains a frame 1, on which a drive faceplate-flywheel 2 is installed with a movable knife 3, a fixed knife 4, feed rollers 5,

5, the drive in the form of an electric motor 6 with a gearbox 7. The stationary knife 4 is made in the form of a sleeve 8 provided with a tubular guide 9 rigidly connected with it, located between the rollers 5 and the sleeve 8.

0 On the bed 1, two stops are mounted perpendicular to the plane of rotation of the faceplate-flywheel 2, one of which (the stop 10) is coaxial with the tubular guide 9 of the fixed knife 4, and the other stop 11 is set with an angular displacement relative to the stop 10 in the direction of rotation flywheel faceplate 2 is made of elastic, for example, polyurethane, and its end face is installed with the ability to interact with the faceplate of the flywheel faceplate.

The end surface of the stop 10 has a bevel in a vertical plane ranging from 0.5 to 5 ° and forms between the plane

5, cutting the material and the end surface of the anvil, a passage reducing the distance between the cutting plane and the end surface of the abutment in the direction of rotation of the faceplate. Stop 10 is supplied

0 by a screw 12, which regulates the distance between the cutting plane and the end of the cut blank 13 from the bar (wire) 14. On the face-flywheel 2, additional movable knives are installed.

five

The machine works as follows.

Bar 14 or wire is threaded

into the tubular guide 9 and using

feed rollers 5 moves along it

through the fixed knife 4 up to the stop 10, which with the help of the screw 12 is set to the desired length of the cut workpiece,

In the process of supplying the material being cut (rod) due to the pulling force developed by the rollers 5, the material is axially pressed at the end of the stop 10 at the time of material being tucked in, while the material is protected from lateral bending by the tubular guide 9 and the rollers 5. Due to axial compression a volumetric stress state of compression arises, which contributes to a clean plastic cut of the workpiece 13 without chipping and cracking with the help of knife 3 or an additional movable knife rotating together with the faceplate 2 from the electric motor Atel 6 through the reduction gear 7.

At the time of cutting the material, the workpiece is shifted in the cutting plane in the direction of rotation of the faceplate-flywheel in a narrowing gap between the end of the fixed knife 4 and the beveled end of the stop 10, thereby improving the cutting accuracy of the workpiece along the length.

Cut off the workpiece 13 by inertia is moved with the help of the knife 3 in the direction of rotation of the faceplate 2. To prevent the cut workpiece from moving over the material being cut and at the same time creating poor quality material cutting, the cut off workpiece is removed from the knife on the faceplate 2 using the stop 11 which, due to its elasticity, easily comes into contact with the end of the cut piece and throws it into the assembly container.

Due to the proposed design of the machine, it is possible to produce better cutting of wire and rods into blanks of a strictly specified length, while increasing the reliability and performance of the machine.

Claims (2)

Claim 1. Wire and bar cutting machine, including a drive plate mounted on the frame with a movable knife fixed on it, a fixed knife mounted on the frame, and feed rollers, characterized in that, in order to improve the productivity and quality of cutting, the fixed knife is made the form of a sleeve provided with a tubular guide rigidly connected with it, and the machine is equipped with additional movable knives mounted on the faceplate and two cantilever stops, mounted on the frame perpendicular to the plane of rotation of the faceplate, one of which is installed on the feed axis of the bar material and its front surface has a bevel of 0.5-5 °, reducing the distance between the cutting plane and the end surface of the abutment in the direction of rotation of the faceplate, and the other the abutment is located with an angular displacement relative to the first abutment in the direction of rotation of the faceplate, while its cantilever portion is made of an elastic material, and the end is arranged to interact with the face of the faceplate. 2. An automatic machine according to claim 1, characterized in that the stop mounted on the axis of supply of the bar material is adjustable. -t V 3 & Fig 2. s / w FIG. five