RU46449U1 - CUTTING MACHINE - Google Patents

Abstract

The utility model relates to the processing of metals by pressure, namely to mechanical shears with parallel knives for cutting, and can be used for cutting round, square, strip and reinforcing steel. The purpose of the utility model is to increase the service life and the safety of the operation of a machine for cutting rolled products. The rolling cutting machine comprises a frame, a bed with a fixed knife, a drawer with a movable knife, mounted in the frame with the possibility of rotation around the axis, a collapsible insert placed in the window of the drawer on the drive eccentric shaft, is additionally equipped with a rolling bearing installed between the insert and the eccentric shaft, loading and protective device made in the form of two swinging rods with counterweights. The liner and the window in the wings have a trapezoid shape, the smaller base of which is facing the movable knife. The machine is equipped with a hinged protective casing, the machine frame is B-shaped, a protective L-shaped mesh fence of the cutting zone is mounted on the bed, and a feeding roller table is installed on the side plane of the bed in the area of the throat. The machine has a high resource and is safe to use.

1 myself. p. f-ly., 5 s. P. f-ly, 5 ill.

Description

The utility model relates to the processing of metals by pressure, namely to mechanical shears with parallel knives for cutting, and can be used for cutting round, square, strip and reinforcing steel.

Known scissors for cutting steel, containing a bed in which a block is interlocked with the possibility of relative movement of the upper and lower knife supports. At the same time, the Upper support is mounted on the main necks of the eccentric shaft, and a detachable sleeve is installed on the eccentric journal of the shaft, which is located in the bore of the lower support. The outer diameter of the split sleeve is determined by the ratio , a where D is the outer diameter of the split sleeve: d ₁ is the diameter of the main journals of the eccentric shaft; d ₂ - the diameter of the eccentric necks; e is the eccentricity of the shaft; E - eccentricity of the sleeve [1].

The disadvantage of these scissors is the complexity of their manufacture, since to ensure the safe operation and creation of a closed cutting zone, a complex clamping mechanism and a complex bed structure are required.

Known scissors for cutting steel, containing a frame with a fixed knife, a drawstring with a movable knife, mounted in the frame with the possibility of rotation around the axis; a window is made in the wings, in which an insert is mounted on the drive eccentric shaft; the cross-sectional insert has the shape of a figure bounded on two sides by parallel lines, on the third side facing the knives — half a circle, and on the fourth side — an arc of large radius; the window in the wings has the shape of a figure bounded on two sides by diverging segments of straight lines of the same length, on the third side facing the knives - half the circumference, and on the fourth side - an arc of large radius; the cutting edges of the knives are beveled [2], [3]

This device is selected as a prototype of the considered utility model.

The disadvantages of this device are:

- Low resource due to high loads that occur at the interface between the liner and the eccentric shaft;

- An insufficient level of safety, since there is the possibility of ejecting the cut workpiece from the cutting zone due to the open cutting zone

- Lack of stability due to the design of the frame of the machine, which is made of a P-shaped;

- Insufficient protection of components and mechanisms from getting into the machine the waste of cut materials, dust and moisture, as well as an increased noise level due to the use of two separate casings on the sides of the bed to protect the machine mechanisms.

The purpose of this utility model is to increase the resource and safety of the machine for cutting.

The above goal is realized in a utility model due to the fact that the rolling machine for cutting, containing a frame, a bed with a fixed knife, a drawer with a movable knife, mounted in the frame with the ability to rotate around the axis, a collapsible liner placed in the window of the scenes on the drive eccentric shaft , is additionally equipped with a rolling bearing installed between the liner and the eccentric shaft, a loading and protective device made in the form of two swinging rods with balances located above the throat for laying the cut direct material on both sides.

This goal is also realized due to the fact that the liner and the window in the wings are in the form of a trapezoid, the smaller base of which is facing the movable knife.

In addition, to achieve this goal, the machine is equipped with a common protective casing, and the casing is hinged, the machine frame is B-shaped, a protective L-shaped mesh fence of the cutting zone is mounted on the bed, and installed on the side plane of the bed in the area of the throat for fitting reinforcement feed roller table.

From the use of machines for a similar purpose, it is not known about the presence in any known technical solution of essential features identical to those claimed. Thus, in the claimed technical solution uses a new set of features set forth in the formula useful

model, which ensures the implementation of the goals set in the utility model. The conclusion that the claimed technical solution meets the criterion of "novelty" is legitimate.

The above set of essential features can be used (reproduced) repeatedly with the same beneficial effect - the design of a machine for cutting rolled products. The specified set of essential features gives reason to argue that the claimed technical solution meets the criterion of "industrial applicability".

The stated essence of the utility model is illustrated by drawings, which depict:

figure 1 - General view of the machine;

figure 2 - design of the rocker mechanism;

figure 3 is a top view of the machine;

figure 4 - the design of the frame of the machine (section aa);

Figure 5 is a front view of the machine.

The machine consists of a frame 1, on which a frame 2 is installed, which serves to fasten the main components of the machine. The frame of the machine is made of a B-shaped. All mechanisms and the machine drive are placed under a common casing 3, which is made reclining by rotation relative to axis 4. Blinds are made on the side walls of the casing. On the bed side of the pharynx for laying the cut material, a feed roller 5 is mounted.

The loading and protective device placed above the throat for laying the material to be cut consists of two rods 6 with counterweights 7 mounted for rotation in forks 8.

The cutter assembly includes a fixed knife 9 mounted on the bed 2 at an acute angle to the vertical, a link 10 with a movable knife 11, mounted on the bed 2 on the axis 12. In the link 10 there is a window in which a detachable insert 13 is mounted on the drive an eccentric shaft 14. Between the liner 13 and the eccentric shaft 14 is placed a rolling bearing 15, in particular a needle bearing. The window in the wings 10 and the detachable insert 13 have a trapezoid shape, the smaller base of which is facing the movable knife.

On the bed 2, near the cutting zone, a protective mesh fence 16 is installed. The fence is L-shaped and is located

relative to the fixed knife 9, both from above and from the side opposite to its cutting edges.

The machine operates as follows.

Loading of the workpiece between the knives can be performed both from the side and from above, using a protective boot device. When loading from above, the free ends of the swinging rods 6 under the action of the mass of the workpiece move down, as a result of which the workpiece falls into the throat between the knives. Under the influence of the mass of the stops-counterweights 7, the rods 6 return to their original position and block the pharynx from above, thus preventing the ejection of the workpiece.

Before the start of the cut, the link 10 is set so that the movable knife 11 is located vertically. The workpiece is located between the knives 9 and 11. When the machine drive is turned on (not shown in the figures), the eccentric shaft 14 starts to rotate, the insert 13 rotates relative to the bed according to the configuration of the side window 10. In a specific example, the insert 13 moves in the window along the trapezium bases. The link makes a swinging motion relative to the frame 2 around axis 12, the movable knife is pressed against the workpiece, and with further movement of the wings, the workpiece is cut. After that, the scenes 10 returns to its original position. During one revolution of the eccentric shaft 14 of the link 10 performs one working and one idling.

A high resource of the machine is achieved due to the fact that between the eccentric shaft 14 and the liner 13 is placed a rolling bearing 15, as a result of which there are no deformations of the shaft and the liner. The use of a rolling bearing also reduces the consumption of non-ferrous metals in the design of the machine.

The use of a loading-protective device of the described design allows to prevent the ejection of the workpiece, while ensuring both vertical and horizontal loading of the workpieces. The implementation of a protective fence in the form of a mesh around the cutting area allows the operator to be protected and, at the same time, allows to visually control the cutting process.

Thanks to the use of a common protective casing, the noise level during the operation of the machine is reduced, the degree of protection of the machine mechanisms from ingress of cut materials and dust into the waste is increased, and protection against operator penetration into the danger zone is provided. Since the casing of the machine is made

folding, increases the efficiency of maintenance and repair of the machine.

The B-shaped design of the frame increases the stability of the machine, facilitates its installation at the place of operation, in particular, allows the machine to be installed not only on the foundation, but also on vibration mounts.

Sources of information

1. RU, C1, 2114722 according to IPC classes: B 23 D 15/04, B 26 D 1/09, publ. 07/10/1998

2. Konstantopulo G.S. Mechanical equipment for factories of reinforced concrete products: Textbook for technical schools. - M .:

Stroyizdat, 1982

3. Mogilevsky Ya. G. et al. Machines and equipment for concrete and reinforced concrete works. M .: Stroyizdat, 1993

Claims (6)

1. Rolling cutting machine, comprising a frame, a bed with a fixed knife, a drawstring with a movable knife, mounted in the bed with the possibility of rotation around the axis, a detachable insert placed in the window of the scenes on the drive eccentric shaft, characterized in that it is equipped with a rolling bearing, installed between the liner and the eccentric shaft, loading and protective device, made in the form of two swinging rods with stops, counterweights, located above the throat for laying the cut material on both sides. 2. The machine according to claim 1, characterized in that the liner and the window in the wings are in the form of a trapezoid, the smaller base of which is facing the movable knife. 3. The machine according to claim 1, characterized in that it is equipped with a common protective casing, and the casing is made folding. 4. The machine according to claim 1, characterized in that the frame of the machine is made of a B-shaped. 5. The machine according to claim 1, characterized in that it contains a protective mesh fence of the cutting zone, and the fence is made of a L-shaped and mounted on a frame above a fixed knife. 6. The machine according to claim 1, characterized in that it is equipped with a feed roller mounted on the side plane of the bed in the area of the throat for laying reinforcement.