SU1687393A1 - Method of manufacture of cutting tool - Google Patents

Abstract

The invention relates to welding, in particular to arc welding, and can be used in the manufacture and restoration of a cutting disk tool. The purpose of the invention is to improve the quality of manufacture of the cutting tool by eliminating spalling of the weld metal at the place of separation of the blanks. Disc blanks for the manufacture of tools are assembled into a bag and placed on a mandrel between restrictive discs. Between the workpieces install technological inserts, the outer diameter of which is equal to the diameter of the workpieces. After surfacing with wear-resistant material of the entire cylindrical surface between the limiting discs and subsequent annealing of the package of the weld billets in the places where the technological inserts are installed, the package is divided into separate blanks. The surfacing of a package of blanks also allows an increase in labor productivity due to the use of a beam of two or more electrodes. 1 il. v Ё

Description

The invention relates to welding, in particular to arc welding, and can be used in the manufacture and restoration of a cutting disk tool.

The purpose of the invention is to improve the quality of manufacture of the cutting tool by eliminating spalling of the deposited metal from the side of the welded workpiece. ki

The drawing shows an example of the implementation of the proposed method.

The mandrel 1 is fitted with restrictive disks 2, the thickness of which is in the range of 6-8 mm, between which the workpieces 3 are installed in the form of disks. To reduce metal losses during subsequent machining between the workpieces 3, technological

insert 4, for example the ring, the width of which is somewhat larger than the width of the cutting cutter, and the diameter is equal to the diameter of the workpiece. It is allowed to install disks instead of rings with their further use on smaller diameters,

Surfacing of wear-resistant material 5 is carried out along the cylindrical surface between the two limiting disks 2. After annealing, the package of blanks 3 is cut at the place of installation of the process inserts 4 and the final machining is carried out to obtain the finished tool.

The method allows to improve the quality of the cutting tool by eliminating spalling of the weld metal in place of the workpiece connector. The method also makes it possible to improve the deposition rate of the PU 00

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the use of a beam of two or more electrodes.

Example. 10 disk cutters with a diameter of 200 mm and a thickness of 10 mm were made. Preliminarily, restrictive disks with a thickness of 6 mm and a diameter of 210 mm were placed on the mandrel, between which 10 pieces of workpieces for cutters were placed. in the form of disks with a diameter of 170 mm and a thickness of 11 mm. At the same time, technological inserts were installed in the form of rings with a diameter of 160 mm and a thickness of 5 mm in the amount of 11 pcs. On the assembled package of blanks, an electric arc method was used for surfacing a wear-resistant material with a thickness of 15 mm over the entire cylindrical surface of the package between the two limiting disks. The hardness of the deposited material was 59-63 units. HRC. The deposited package of billets was annealed, after which the hardness of the deposited material reached 27-32 units-HRC, and then the deposited by a slotted disk cutter with a thickness of 3 mm was cut.

After dividing the package into separate blanks, they were finalized.

machining to obtain the finished product. As a result of using the method, the quality of the made cutting tool has improved, and the process of separation of the workpieces has also been simplified.

Claims (1)

Invention Formula A method of manufacturing a cutting tool, in which the blanks are placed in a package before being deposited, the package of blanks is placed in a crimping device, the welding is carried out immediately on all the blanks of the package, after which the weld package is divided into separate blanks at the point of their joint, characterized in that in order to improve the quality of manufacture of the cutting disk tool by eliminating spalling of the weld metal at the place of separation of the workpieces, technological inserts are placed between the workpieces; equal to the diameter of the workpiece, and the division of the package into individual workpieces is carried out at the location of the process inserts using machining.