RU1782713C - Method of hydraulic abrasive cutting of sheet parts - Google Patents

Abstract

Usage: when cutting sheet non-metallic parts. SUMMARY OF THE INVENTION: water-abrasive particles in the form of an abrasive slurry with a solution of wax and gasoline are applied to the surface to be treated and subsequently cured, after which a working fluid is supplied under high pressure, resulting in high precision cutting of sheet non-metallic parts around the contour. 1 ill.

Description

The invention relates to technological processes, in particular to the processing of parts by a jet of working fluid, and can be used in various branches of mechanical engineering.

The aim of the invention is to increase the accuracy of cutting parts by creating the same conditions.

The drawing shows a device that implements the proposed method. The device comprises a bath 1 for working with a working solution, a washing bath 2, a conveyor 3 placed above them, a fan 4 for curing the abrasive medium 5, placed in a container 6 and transferred to the workpiece by means of a roller 7, a nozzle 8 for supplying a working solution from the tank 9, a nozzle 10 for washing parts, a fan 11c with a heater 12 for drying.

The device operates as follows.

When a jet of working fluid is supplied from the nozzle 8 under high pressure, the material is cut off according to a given configuration. Since the surface to be treated is coated with a uniform layer of abrasive medium 5, the conditions for treating the first and subsequent parts with a jet of working fluid are the same.

Example.

Processing of non-folded fiberglass 3 mm thick along a figured contour with a stream of water flowing from a nozzle with a diameter of 0.1 mm is carried out. The following processing parameters are set: the nozzle inlet pressure is 200 MPa and the nozzle-surface distance is 3 mm for a board measuring 40 x 60 mm. An abrasive medium is prepared in the form of a suspension of natural quartz sand (10 ... 15 g) with a diameter of 50 ... 500 μm with a solution of wax (10 ... 15 g) in gasoline (100 ml). The suspension is applied to the board by irrigation and cured at normal temperature for 2 ... 5 minutes under a fan. The jet of water, entrained by the abrasive particles, cuts the circuit board along the contour with the surface roughness

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the cut within P «20 ... 40 without cracks and delaminations (with slight microloosening of the fibers transverse to the cutting direction). Parts are washed from abrasive residues in hot water, after which they are dried by any known method.

Since the abrasive is applied to the workpiece surface to be treated, forming a cortical layer, the conditions for exposure to a water jet in the processing zone at any part of the part are the same and do not depend on the order (seriality) of the part itself. Due to this, the quality of processing of parts is identical and the output physical and mechanical parameters of the material are repeatable. The approval of the abrasive medium applied to the processing surface of the part serves to form a crust layer of the abrasive, which contributes to

improving the conditions for the interaction of a jet of water and material in the treatment zone.

Compared with the base object, which is used as the prototype, the same conditions for the interaction of the abrasive medium and the material, as well as the quality of processing, regardless of the order of processing of parts, are achieved.

Claims (1)

SUMMARY OF THE INVENTION A method for waterjet cutting sheet metal parts, comprising applying to a work surface a jet of a working fluid under high pressure and abrasive particles, characterized in that, in order to increase accuracy when processing non-metallic parts, abrasive particles are fed to the work surface by applying them in the form of a suspension, which is cured. then serve the working fluid. GO