RU2240898C1 - Flying saw for cutting moving rolled pieces - Google Patents

Abstract

FIELD: separation of moving rolled tubes by measured length values in aggregates for continuous electric welding of tubes and bending shapes.

SUBSTANCE: saw includes foundation with horizontal guides for moving carriage with mechanisms for clamping and sawing; drive unit for moving carriage in the form of rack gearing; and hydraulic system. Foundation is in the form of two welded columns mutually joined by means of hollow tie rods and having inner reservoirs for working liquid. Foundation is provided with struts arranged on columns and designed for mounting horizontal guides. Foundation is also provided with platforms for placing carriage drive unit and hydraulic system respectively. Carriage has vertical guides for moving sawing mechanism by means of hydraulic cylinder. Said mechanism may be realized in three variants.

EFFECT: lowered size, metal and energy consumption of flying saw, reduced cost of making and using saw at the same technological possibilities, improved operational reliability, increased useful life period of saw.

5 cl, 8 dwg

Description

The invention relates to the field of metal forming, is intended for cutting moving rolled products into measured lengths and can be used in continuous pipe-welding and roll-forming units.

Known flying saw for cutting pipes (see AS USSR No. 1042917, class. 23 D 45/24, decl. 09/25/81, publ. 09/23/83), containing a base on the rails which is mounted carriage with clamping and cutting mechanisms. The cutting mechanism consists of a saw blade mounted on a spindle, its drive and a lateral feed mechanism. The carriage is equipped with a drive of its axial movement, including a gear rack pivotally mounted on the carriage and mated with a gear gear mounted on the driven shaft of the gearbox and an electric motor. To ensure the hydraulic clamping of the pipe and the drive of the transverse feed of the saw blade, the saw is equipped with a separate hydraulic system for supplying the working fluid.

The design features of the saw and carriage with a saw blade (circular saw) do not allow the use of other cutting tools on it (to expand technological capabilities and scope), since their use requires other kinematic and structural solutions.

Significant dimensions, metal consumption (solid foundation, freestanding hydraulic system), the presence of a complex planetary gear for lateral feeding of the saw blade, the use of only one saw blade makes a flying saw expensive both in manufacturing and in its operation.

The saw blade has low durability, and the presence of a planetary gear for its transverse feed makes the saw insufficiently reliable in operation.

Given the significant mass of the carriage (1000-1600 kg), the high speed of its horizontal movement (1-2 m / s) and its dynamics (cutting cycle time is from 3 to 10 seconds), the distance from the center of mass is important for the reliability of the saw to the horizontal plane of the bed guides. In the described construction, it is about 250 mm. In the case of inconsistency of the carriage speeds and the transportation speed of the cut steel, this creates a large overturning moment when clamping and cutting it, which reduces the durability of the carriage equipment and, primarily, the saw blade.

The placement of the flywheel on the cantilever input shaft of the planetary gearbox due to the high dynamics of the drive rotation of the saw blade (360-1200 cuts per hour) further sharply reduces the reliability and durability of the gearbox elements.

Of the known flying saws for cutting rolling metal, the closest in technical essence is the flying saw for cutting rolling steel, described in Russian patent No. 2167747, IPC 7 V 23 D 81/00, decl. 06/09/1997, publ. 05/20/1999

This flying saw for cutting a rolling metal contains a base, on the horizontal guides of which there is a carriage with clamping and cutting mechanisms, a drive rack mechanism for moving the carriage and a hydraulic system.

In this case, the carriage is removable, and the cutting mechanism contains a saw blade or notching with stepwise arranged teeth and a wedge-shaped detachable knife. The frame of the removable carriage with a cutting mechanism comprising a notch with stepped teeth and wedge-shaped knives is made with circular guides for turning the clamping and cutting mechanisms around the longitudinal axis of the flying saw.

A disadvantage of the known design of a flying saw for cutting a rolling mill is the presence for each method of cutting its interchangeable carriage, a solid base and a separate hydraulic system, which makes it metal-intensive, time-consuming to manufacture and, as a result, expensive to manufacture and operate.

Placing the flywheel on the cantilever input shaft, a significant distance from the center of mass of the carriages to the horizontal guides dramatically reduces the reliability and durability of the flying saw. In addition, the cantilever placement of the flywheel limits the production of flywheel (mechanical) energy and, as a result, requires an increase in flywheel energy (power and dimensions) of the electric motor.

The implementation of the frame of the removable carriage with a cutting mechanism, comprising a notching with stepwise arranged teeth and wedge-shaped knives with circular guides for turning the clamping and cutting mechanisms around the longitudinal axis of the flying saw, complicates and increases the cost of the flying saw and reduces its reliability.

The objective of the present invention is to create a flying saw for cutting moving steel, which allows to reduce the size, metal consumption, energy consumption, manufacturing and operating costs while maintaining its technological capabilities.

The next task is to create a flying saw for cutting moving steel with high reliability and durability.

The problem is achieved in that in a flying saw for cutting a rolling rolled product containing a base, on the horizontal guides of which a carriage with clamping and cutting mechanisms is mounted, a carriage moving drive in the form of a rack gear and a hydraulic system, according to the invention, the base is made in the form of two welded rods curbstones with internal containers for working fluid and is equipped with racks located on the curbstones for fastening horizontal guides and platforms for driving the carriage and hydraulic systems.

The carriage is equipped with vertical guides to move the cutting mechanism using the hydraulic cylinder.

The cutting mechanism is made in the form of a housing moving along vertical guides of the carriage, in which a spindle is mounted on the rolling bearings, one end of which is connected to an electric motor, a circular saw is fixed at the other free end of it, and the spindle part located between the bearings is made in the form of a flywheel.

In addition, the cutting mechanism is made in the form of a case moving along vertical guides with a curly knife fixed to it with two side cutting edges and two side knives interacting with the said knife fixedly mounted on the carriage.

The cutting mechanism can be made in the form of a case moving along vertical guides with a wedge-shaped detachable knife and rail, as well as a knife that is kinematically connected with a detachable knife and is cut with stepwise mounted teeth mounted on a slide rail mounted with the possibility of horizontal movement in the guides of the support mounted on the carriage while the kinematic connection is made in the form of mounted with the possibility of rotation in bearings placed on the vertical guides of the carriage Ala with two gears interacting with the aforementioned rack and slide bar.

Such a constructive implementation of a flying saw for cutting rolling steel will reduce the size and metal consumption, which is achieved by making the base in the form of two welded cabinets connected by hollow rods with internal containers for working fluid, supplying racks for fastening horizontal guides and platforms for moving drive placed on the curbstones carriages and hydraulic systems.

The implementation of the cutting mechanism in the form of a housing moving with a hydraulic cylinder along the vertical guides of the housing, in which a spindle is mounted on the rolling bearings, one end of which is connected to an electric motor, a circular saw is mounted on the other free end of it, and a spindle part located between the bearings in the form of a flywheel , will reduce the metal consumption, the complexity of manufacturing and increase the reliability.

In addition, the placement of the flywheel between the rolling bearings, its implementation in the form of a thickened part of the spindle reduces the mass and increases the reliability of the cutting unit, and also due to a more optimal and reliable placement of the flywheel makes it possible to reduce the power of the spindle rotation motor.

Replacing only the cutting mechanism, and not the entire carriage, when cutting cylindrical pipes with a diameter of 6 to 51 mm (cutting with a notch), 51 to 114 mm (circular saw), rectangular and square pipes (depending on the cross-section of the cutting with a notch or circular saw), open bent profiles (with a workpiece width of up to 360 mm - cutting with one movable and two fixed knives) reduces the composition of the equipment, the complexity of manufacturing and, as a consequence, the cost of manufacturing and operation.

The fastening of horizontal guides on the base (stands) with the help of racks makes it possible, if necessary, to change the location of the guides both horizontally and vertically relative to the axis of the cut steel or the horizontal axis passing through the center of mass of the carriage.

To explain the invention, a specific embodiment of the invention is given below with reference to the accompanying drawings, in which

figure 1 shows a flying saw for cutting a rolling metal;

figure 2 is the same, plan view;

figure 3 is a section aa in figure 2;

figure 4 is a view of B in figure 1;

figure 5 - cutting mechanism with a figured knife and two side knives;

figure 6 - cutting mechanism with a notching and wedge-shaped cutting knives;

Fig.7 is a view In Fig.6;

in Fig.8 is a view of G in Fig.5.

A flying saw for cutting a rolling metal contains a base, on the horizontal guides 1 of which a carriage 2 with clamping mechanisms 3 and cutting is installed, a drive mechanism 4 for moving the carriage 2, made in the form of a rack and pinion, and a hydraulic system 5.

The base is made in the form of two welded bollards 7, 8 connected by hollow rods 6, having internal containers for the working fluid, interconnected through the cavity of the rods 6.

On the welded stands 7, 8 there are racks 9, 10 in which horizontal guides 1 of the base are fixed, which serve to move the carriage 2 along them. In addition, on the stand 8 there are platforms for the drive 11 of the rack and pinion mechanism 4 for moving the carriage 2 and the hydraulic system 5. On the cabinet 7 has a follower roller 12, which serves to measure the length of the cut pipes.

Rollers 13 are mounted on the carriage 2 for moving it along the guides 1. The carriage 2 is equipped with vertical guides 14 for moving the cutting mechanism along them using a hydraulic cylinder 15 located on the crosshead 16, connecting the vertical guides 14 to each other.

The cutting mechanism is made in the form of being able to move along the vertical guides 14 of the carriage 2 of the housing 17 with rollers 18, 19 embedded in it, in which a spindle 22 is mounted on the rolling bearings 20, 21, one end of which is connected to the electric motor 23, and on the other free end the spindle 22 is fixed to a circular saw 24. The part of the spindle 22 located between the bearings 20, 21, is made in the form of a flywheel 25.

The clamping mechanism 3 is mounted on the carriage 2 in its lower part between the vertical guides.

For cutting open bent profiles, the cutting mechanism is made in the form of a housing 26 with rollers 27 embedded in it and a figured knife 28 fixed on it with two side cutting edges "D" and "E", which can be moved along the vertical guides 14 of the carriage 2 using the hydraulic cylinder 15 located on the traverse 16.

On the lower traverse 29 of the carriage 2, two side knives 30, 31 are fixedly mounted, made in the form of a profile, with a gap “S” between them equal to the thickness of the knife 28.

For cutting round and shaped pipes of medium diameter, the cutting mechanism is made in the form of a housing 32 with rollers 33 built into it, fixed on it with a fixed wedge-shaped knife 34 and a gear rack 35, which can be moved along the vertical guides 14 of the carriage 2 using a hydraulic cylinder 15 located on traverse 16.

A stand 36 is installed on the lower traverse 29, in the guides of which there is a support 37 with the possibility of vertical movement with the help of a screw 38. In the guides of the support 37 there is a slider rail 39 with a knife 40 fixed on it with a notch with stepwise arranged teeth. On the guides 14 of the carriage 2 bearings 41 mounted shaft 42 with gears 43, 44 with the possibility of vertical movement using screws 45.

Gears 43, 44 are respectively engaged with gear rack 35 and slide rail 39.

The clamping mechanism includes clamping jaws 46, 47 installed in the guides of the lower beam 29 with the possibility of movement from the hydraulic cylinder 48, the housing of which is connected to the sponge 46, and the rod with the sponge 47.

The device operates as follows.

When cutting round pipes of large diameter, as well as profile pipes in the carriage of a flying saw, a cutting mechanism using a circular saw 24 is used.

The carriage 2 is in the initial position (far left) on the guides 1. The spindle 22 together with the circular saw 24 is informed of the rotational movement by the electric motor 23. The housing 17 with the circular saw 24 is in the initial position, in which the circular saw 24 is located outside the pipe cutting zone 49. The drive motor 11 of the movement of the carriage 2 is informed at such a speed that the speed of the carriage becomes equal to the speed of the pipe. After the equality of speeds between the pipe and the carriage is achieved, a command is issued to turn on the clamping mechanism 3, which clamps the pipe on the carriage in front of the cut. After the operation of the clamping mechanism and the passage of a predetermined length of the cut pipe, the hydraulic cylinder 15 of the cutting mechanism is turned on. As a result of this, the housing 17 with the circular saw 24 moves down the vertical guides 14, cutting the wall of the pipe with a circular saw. In this case, the housing 17 with the circular saw 24 is in its lowest position when the cutting part of the saw is outside the lower generatrix of the cut pipe. Then the housing 17 with the circular saw 24 using the hydraulic cylinder 15 is returned to its original position. The clamping mechanism 3 opens, the carriage is stopped and returned to its original position. All this time, the engine 23 of the cutting mechanism is in continuous rotation. Due to the presence of the flywheel 25, the circular saw 24 at the beginning of the next cut again stores the necessary energy for cutting the pipe.

All mechanisms of the flying saw are in the initial position and are ready for the next cut.

When cutting open profiles on the vertical guides of the carriage 2, a cutting mechanism is installed, made in the form of a housing 26 with a curly knife 28 attached to it with two side cutting edges and two side knives 30, 31, mounted on the carriage and made in the form of a cut profile.

Upon receipt of a command to cut the profile, the motor of the drive 11 for moving the carriage 2 is informed of such a frequency of rotation at which the speed of movement of the carriage is equal to the speed of movement of the cut profile. The hydraulic cylinder 15 of the cutting mechanism is turned on, moving the housing 26 with a curly knife 28 mounted on it, which, interacting with the side knives 30, 31, cuts the width profile 50 moving between them. At the end of the cut with the hydraulic cylinder 15, the housing 26 with the figured knife 28 returns to its original position. The drive motor moves the carriage also returns to its original position and turns off. The profile cutting cycle ends.

When cutting round and shaped pipes of medium diameter in the carriage of a flying saw, a cutting mechanism is used that has a notching 40 with stepwise arranged teeth and a wedge-shaped 34 cutting knife.

The carriage is in its original position. When a signal arrives at the pipe cutting, the motor of the drive 11 for moving the carriage 2 is informed of such a frequency of rotation at which the speed of the carriage will be equal to the speed of the pipe. After equality of speeds between the pipe and the carriage, the clamping mechanism is activated, which clamping jaws 46, 47 by means of a hydraulic cylinder 48 clamp the pipe on the carriage in place of the cut. After the clamping mechanism is activated and the specified length of the cut pipe is passed, the cutting mechanism hydraulic cylinder 15 is turned on, moving the housing 32 with the wedge-shaped cutting knife 34 and the gear rack 35. When the body 32 is moving, the gear rack 35 is engaged with the gear 43 of the shaft 42. When the shaft 42 rotates, also the movement of the slide rail 39 with a notching knife 40 fixed to it with stepwise arranged teeth, which interacts with the gear 44 of this shaft. The introduction into the cut pipe of the incision knife 40 and the wedge-shaped knife 34 occurs sequentially.

At the end of the cut with the hydraulic cylinder 15, the housing 32 with the wedge-shaped knife 34 and the slider rail 39 with the notching knife 40 are returned to their original position. The clamping jaws 46, 47 of the hydraulic cylinder 48 open. The carriage 2 returns to its original position. The electric motor of the carriage displacement drive 11 is turned off. Next, the cycle repeats.

The proposed flying saw for cutting rolling steel in comparison with the known ones allows to reduce dimensions, metal consumption and energy intensity, as well as reduce the cost of manufacturing and operation while maintaining its technological capabilities.

In addition, this design of the flying saw will increase its reliability and durability.

Claims (5)

1. A flying saw for cutting rolling steel, containing a base, on the horizontal guides of which a carriage with clamping and cutting mechanisms is mounted, a carriage movement drive in the form of a rack and pinion gear and a hydraulic system, characterized in that the base is made in the form of two welded stands with internal hollow rods containers for working fluid and is equipped with racks located on the pedestals for mounting horizontal guides and platforms for driving the movement of the carriage and the hydraulic system. 2. Saw according to claim 1, characterized in that the carriage is equipped with vertical guides for moving the cutting mechanism using a hydraulic cylinder. 3. The saw according to claim 2, characterized in that the cutting mechanism is made in the form of a housing moving along vertical guides of the carriage, in which a spindle is mounted on the rolling bearings, one end of which is connected to an electric motor, a circular saw is fixed to the other free end, and the spindle part located between the bearings is made in the form of a flywheel. 4. The saw according to claim 2, characterized in that the cutting mechanism is made in the form of a case moving along vertical guides with a curly knife fixed on it with two side cutting edges and two side knives interacting with the knife, fixedly mounted on the carriage. 5. The saw according to claim 2, characterized in that the cutting mechanism is made in the form of a body moving along the vertical guides of the carriage with a wedge-shaped cutting knife and a gear rack, as well as a cutting knife kinematically connected with a wedge-shaped cutting knife with stepwise mounted teeth mounted on a slider- rail mounted with the possibility of horizontal movement in the rails mounted on the carriage of the support, while the kinematic connection is made in the form of mounted rotatably mounted shaft bearings with two gears interacting with said rail and slide rail on vertical carriage guides.

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