RU2457102C2 - Cutting head with abradant feeder - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to hydrodynamic cutting devices. Proposed device comprises three-axis positioning and driving system with slide, cutting head, vertical motor secured on slide and horizontal motor. Bracket with vertical rotational axis is secured on vertical motor rotor. Bracket with horizontal rotational axis is secured on aforesaid bracket. Hollow vertical motor incorporates vertical tube. Said vertical tube accommodates high-pressure pipeline. Vertical case is secured on vertical tube end. Angular case with vertical rotational axis is pivoted to vertical case. Horizontal case with horizontal rotational axis is pivoted to angular case. Case with horizontal rotational axis is arranged on bracket with horizontal rotational axis. Bracket with horizontal rotational axis comprises flange with channel to support cutting head.

EFFECT: expanded performances.

1 dwg

Description

The invention relates to devices for waterjet cutting, and more particularly to auxiliary devices for forming a jet of abrasive particles, and can be used in technological processes for dimensional cutting of metal products, ceramics, polymer composite materials (PCM) and other materials in shipbuilding, aerospace and other industries.

In modern industrial production, there is a growing interest in waterjet cutting technology, which is today the most effective, flexible, environmentally friendly and energy-saving method.

A device "Abrasive fluid system" is known according to the patent EP 101840, 12/07/2000, class B24C 5/04. According to the patent, the device is equipped with a high pressure station, a hopper with an abrasive, a piping system, a cutting head. In this case, the piping system is rigidly fixed in the housing of the cutting head and from the high pressure station through the high pressure channel delivers fluid directly to the displacement chamber of the cutting head.

The disadvantage of this design is that the cutting head is rigidly fixed to the machine and allows the material to be processed in only three coordinates.

The cutting heads, which are controlled on four or five axes, successfully operate in installations of Flow, Water Jet Sweden AB, Bystronic Laser LG, and RTU S.P.O. and etc.

Known devices for waterjet head company PTV S.P.O. (Czech Republic) [Prospectus of the company "PTV S.P.O." from the exhibition "Metalworking-2009"], in which the head housing is mounted on an electric motor shaft, which allows the cutting head to rotate along the horizontal axis. The working fluid is supplied through a "P" -shaped high-pressure tube passing along the linear guides along which the cutting head moves with the help of an electric motor.

The disadvantage of this installation is that the cutting head is not rigidly fixed, and vibration can occur when the working fluid is supplied, which will affect the accuracy of cutting.

The developers of Caretta Technology (Italy) [Prospect of Caretta Technology 2010, Internet address http://www.waterjet-spb.ru/x5.htm], whose head is closest to the invention according to the invention, tried to circumvent this problem. technical essence and the achieved result.

According to the prospectus, the cutting head is mounted on a waterjet cutting machine equipped with a positioning and moving system, a high pressure water supply system and an abrasive supply system. The cutting head comprises a bracket with a vertical axis of rotation driven by a vertical motor mounted on a slider, and a bracket with a horizontal axis of rotation mounted on a bracket with a vertical axis of rotation driven by a horizontal motor. The cutting head is mounted on a bracket with a horizontal axis of rotation and fixed at one point. The working fluid is supplied to the cutting head through a high pressure pipe from the outside, so vibration can occur, which will affect the accuracy of cutting.

This problem can be solved using a system of fittings and pipelines, as well as a flange mount of the cutting head, which allows to increase the rigidity of the mount and, accordingly, the accuracy of movement along the coordinate axes.

The objective of the invention is to develop a device for waterjet cutting. The technical result of the claimed invention is the expansion of the technological capabilities of waterjet cutting, namely cutting parts of complex spatial shapes and ensuring high quality cuts at high speeds and dimensions of the processed parts.

The specified technical result is achieved in that the device for waterjet cutting contains a three-coordinate positioning and moving system with a slider, a cutting head, a vertical motor mounted on a slider, a horizontal motor, a bracket with a vertical axis of rotation mounted on a rotor of a vertical engine, and a bracket with a horizontal axis rotation, mounted on a bracket with a vertical axis of rotation, while, according to the invention, the vertical engine is made hollow and is equipped with fixed a vertical pipe in which a high pressure pipe is passed, a vertical casing is mounted on the end of the vertical pipe, on which an angular casing with a vertical axis of rotation is pivotally mounted, which carries a horizontal casing pivotally mounted in it with a horizontal axis of rotation combined with the axis of rotation of the horizontal engine while the housing with a horizontal axis of rotation is mounted on a bracket with a horizontal axis of rotation, equipped with a flange with a channel on which the cutting head is mounted, tikalny, angular and horizontal housing formed with communicating channels, high pressure pipe is connected to the channel of the vertical body and a horizontal body and a flange connected additional conduit, wherein the flange channel is connected to the output channel of the valve body in the cutting head.

This embodiment of the device for waterjet cutting can improve the quality of parts with increased productivity.

The invention is illustrated in the drawing.

Figure 1 is a General view in section of a waterjet cutting head.

The implementation of the invention

In accordance with the invention, the device for waterjet cutting includes a cutting head mounted on the end face of a vertically moving slider mounted on a mechanical positioning and moving system.

To move the cutting head, there is a machine part made in the form of a portal structure, which is justified by the large amount of displacements of the working bodies along the X and Y coordinates. Such an arrangement provides higher rigidity.

The machine components of the complex include the following components and devices:

- a mechanical positioning and moving system, including:

a base, a traverse, a transverse carriage, a support made in the form of a vertically moving slider mounted on a transverse carriage;

- table tank;

- control system;

- pneumatic equipment.

The base mounted on the foundation, the base unit for moving the beam, consists of two frames interconnected, on which racks with rails are installed on the left and right sides. On racks on four ball bearings of a rolling slide are installed, on which the beam is fixed.

Traverse, a welded aluminum beam with two rows of hardened rails, moves along the racks of the base (X coordinate). The traverse with the slide was moved by two drives operating synchronously.

The carriage is transverse, moving along the guides of the beam (Y coordinate) on four ball bearings. The movement is carried out by a similar drive.

Slider (welded aluminum), with two rows of hardened rails, vertically movable (Z coordinate) along four ball bearings fixedly mounted on the transverse carriage using an electric motor with a clearance-free integrated planetary gearbox through a rack and pinion transmission. For unloading the mass of the slider, as well as fixing its position when stopping, a pneumatic cylinder is installed with the rod fixed when the drive is turned off at the Z coordinates. The cutting head is fixed using a bracket system at the end of the slide (not shown in Fig. 1) and has the ability to move as a whole along the coordinates X, Y, Z with a speed of up to 25 m / min.

The cutting head contains electric drives for its movement, comprising a vertical motor mounted on a slider, and a horizontal motor, a bracket with a vertical axis of rotation mounted on a rotor of a vertical motor, and a bracket with a horizontal axis of rotation, mounted on a bracket with a vertical axis of rotation, a high pressure pipeline, connected to the cutting head.

An arm with a vertical axis of rotation (26) is located at the end of the slider and is driven by a vertical engine. The rotor of the vertical engine (23) is mounted on a hollow shaft (24) mounted on bearing bearings (33) and (35), equipped with a hollow pipe 45 fixed in it, in which a high pressure pipe (4) is passed. At the lower end of the rotor of the vertical engine (23), using screws, a bracket with a vertical axis of rotation (26) is fixed (not shown in Fig. 1). A bracket with a vertical axis of rotation (26) rotates the vertical electric drive (14) around the Z axis by an angle of ± 360 ° (coordinate C). An intermediate body (21) of coordinate A with an integrated horizontal motor (15) is attached to the vertical end of the bracket (26) with screws (not shown in FIG. 1).

The intermediate housing (21) is mounted on the vertical end of the bracket (26) and is equipped with a built-in horizontal electric motor (15). The rotor (27) of the horizontal motor (15) is mounted on a hollow shaft (28), which rotates on bearing bearings (36). At the end of the hollow shaft (28), a bracket with a horizontal axis of rotation (30) is movably fixed (not shown in FIG. 1).

A bracket with a horizontal axis of rotation (30) is mounted on the hollow shaft (28) in the bearings of the intermediate housing (21) mounted on the vertical end of the bracket with a vertical axis of rotation, and is equipped with a rotor (27) of the horizontal motor.

The bracket with the horizontal axis of rotation (30) is provided with a flange (13), on which the cutting head (44) is mounted.

A bracket with a horizontal axis of rotation (30) with a horizontal housing (9), fittings (10) and (12), an additional high-pressure pipe (11), a flange (13) and a cutting head 44 is rotated around a horizontal motor using a horizontal motor (15) axis (coordinate A) at an angle of ± 90 °. A vertical casing (7) is mounted on the end of the pipe (45), an angular casing (8) with a vertical axis of rotation is pivotally mounted on it, bearing a horizontal casing (9) pivotally mounted in it with a horizontal axis of rotation mounted on a bracket with a horizontal axis of rotation ( 30) and combined with the axis of rotation of the horizontal engine. The vertical (7), angular (8) and horizontal (9) cases are made of stainless steel with interconnected channels and equipped with fittings (5), (10), (12).

The angular housing (8) is an angular connection with a system of channels, the channel openings are aligned with the rotation axes of the vertical and horizontal engines. A vertical housing (7), mounted on the lower end of the bracket with a vertical axis of rotation, and a horizontal housing (9), mounted on the end of the bracket with a horizontal axis of rotation (26), are installed in the angular casing with the possibility of rotation. The continuity of fluid supply to the cutting head (44) is ensured by the presence of annular grooves in the channel connection zone, in the connected housings (8) and (9), as well as in the housings (7) and (9), respectively. High pressure O-rings prevent fluid leakage in the joints. The horizontal housing (9) and the flange (13) are connected by an additional pipe (11), using the flanges (12), (10).

The fitting (5) is a stuffing box, inside it is a cuff (6) with a left-hand thread, in which a high pressure pipe (4) is attached. The fitting (5) is installed in the vertical housing (7), the fitting (10) is installed in the horizontal housing (9), the fitting (12) is installed in the flange (13).

The flange (13) is made of stainless steel with a channel and is rigidly fixed to the end of the bracket with a horizontal axis (30) of rotation with screws (41), this fastening increases the accuracy of rotation of the cutting head. The flange (13) is made with a shaft 42 and with a sleeve 43, and is also equipped with a fitting (12). At the end of the flange (13), the cutting head (44) is rigidly fixed with the shaft (42) and the sleeve (43).

The system of fittings and pipelines is interconnected with a high pressure station (1) and contains a high pressure pipeline (4), fittings (5), (10), (12).

The high-pressure channel of the fluid supply from the high-pressure station (1) contains stainless steel high-pressure pipes (4) with an outer diameter of 6 mm, a system of channels of horizontal (7), vertical (9) and angular (8) cases with a diameter of 2 mm, and serves to transport the working fluid to the cutting head (44). The high pressure pipe leads the fluid from the high pressure station (1) to the slider (not indicated in FIG. 1) through the high pressure pipe. Next, the high-pressure pipe passes through a vertical pipe installed in a vertical engine made hollow and is connected via a fitting (5) to the channel of the vertical housing (7), which in turn is connected to the channel of the angular housing (8) and horizontal housing (9 ) The fluid from the channel of the horizontal body (9) enters the cutting head (44) first through an additional pipe (11) connected to the channel of the horizontal body (9) using a fitting (12), then through the channel of the flange (13) connected to the additional pipe (11) using the fitting (10).

The cutting head 44 consists of a valve body (16), in the upper part of which a pneumatic valve is installed coaxially, and the valve body itself is made with a fluid supply channel to the pneumatic valve seat. The pneumatic valve consists of a piston (17), a nut (18), springs (not shown in FIG. 1), a sleeve (20) and a pneumatic valve body (22). In the lower part of the cutting head 22 there is a head pipeline (31) and a mixing chamber (32), which includes: a nozzle (34), a focusing tube (37) and a collet (38).

The focusing tube (37) is fixed with a collet (38) and secured with a nut (39).

A needle (25) installed in the valve body (16) acts as a shutter for the working fluid. A thrust ring (29) serves to prevent leakage of the working fluid.

The abrasive feed system consists of an abrasive hopper (2), a mini-hopper (3), pneumatic automatics and an abrasive feed sleeve (40).

The abrasive minibunker (3) performs the function of both an abrasive accumulator as close as possible to the cutting head (44) and a device in which the abrasive is controlled and dosed.

The device operates as follows:

The processed product is installed on the grate of the table-tank of the waterjet installation. Then, from the control panel of the waterjet installation, the supply of working fluid from the high pressure station is turned on. The working fluid flows through the high pressure pipe from the high pressure station (1) through the pipe (45) of the vertical engine mounted on the slider, passes through a system of channels of horizontal (7), vertical (9) and angular (8) cases, an additional pipe (11 ), the flange channel (13) and enters the cutting head (44). The continuity of fluid supply to the cutting head is ensured by the presence of annular grooves in the zone of connection of the channels, in the cases (8) and (9), as well as in the cases (7) and (9).

As soon as a signal is sent from the control panel of the waterjet installation to the beginning of the cutting program, the needle (25) rises and the working fluid begins to flow to the nozzle (34) through the head pipe (31). Due to the discharge in the mixing chamber (32), abrasive sand from the abrasive minibunker (40) begins to flow into the stream of working fluid. The product is processed according to the specified operator program. At the end of processing, the product is removed from the tank table.

By means of electric motors, the cutting head can rotate around the Z axis (coordinate C) by ± 360 ° and around the horizontal axis by an angle of ± 90 ° (coordinate A).

The use of this device provides rigidity of fastening of the cutting head, which allows to increase the accuracy of moving it along the coordinate axes and the accuracy of machining parts.

This device of the cutting head can be used not only for flat cutting, but also to perform 3D processing of the workpiece, to produce waterjet cutting of products of complex spatial shapes at high speeds and large sizes with good quality.

Claims (1)

A hydro jet cutting device comprising a three-coordinate positioning and moving system with a slider, a cutting head, a vertical motor mounted on a slider, a horizontal motor, a bracket with a vertical axis of rotation mounted on a rotor of a vertical motor, and a bracket with a horizontal axis of rotation mounted on a bracket with vertical axis of rotation, characterized in that the vertical engine is made hollow and is equipped with a vertical pipe fixed in it, in which a pipeline is passed high pressure, a vertical casing is fixed at the end of the vertical pipe, on which an angular casing with a vertical axis of rotation is pivotally mounted, bearing a horizontal casing pivotally mounted therein with a horizontal axis of rotation combined with the axis of rotation of the horizontal engine, while the casing with the horizontal axis of rotation is mounted on bracket with a horizontal axis of rotation, equipped with a flange with a channel on which the cutting head is mounted, the vertical, angular and horizontal housings are made with -rotating channels, high pressure pipe is connected to the channel of the vertical body and a horizontal body and a flange connected additional conduit, wherein the flange channel is connected to the output channel of the valve body in the cutting head.