RU209547U1 - TOOL FOR ELECTROMECHANICAL BURNING - Google Patents

Abstract

The utility model relates to mechanical engineering, in particular to tooling for electromechanical burnishing, and can be used for finishing and hardening the holes of parts. A tool for electromechanical burnishing, containing a mandrel, in the front part of which a reinforcing tooth is fixed. The end of the mandrel is placed in the body and fixed in it with a round nut with the possibility of axial movement, a washer following the round nut, a strain gauge weight sensor, a thrust cylinder and a shank screwed onto the end of the body, the end of which is connected to the Morse taper through an insulator sleeve. The reinforcing tooth is made composite and includes a chamfer made of steel in the form of a truncated cone, to the base of which is adjacent a hard alloy gauge in the form of a spherical belt, which is a continuation of the chamfer, a continuation of the gage is a rear part made of steel in the form of a truncated cone , with its base adjacent to the calibrating part. The labor intensity of manufacturing and the cost are reduced due to the use of cheaper material in less loaded areas. 2 ill.

Description

The utility model relates to mechanical engineering, in particular to tooling for electromechanical burnishing, and can be used for finishing and hardening the holes of parts.

Known tool for electromechanical mandrel, including a mandrel, in front of which a reinforcing tooth is fixed, the end of the mandrel is placed in the body and fixed in it with a round nut with the possibility of axial movement, a washer following the round nut, a strain gauge weight sensor, a thrust cylinder and screwed onto the end of the body shank, the end of which is connected to the Morse taper through the sleeve-insulator [Patent No. 156164 RU, publ. 10/27/2015. Bull. No. 30, class. B24B 39/02].

The known tool has the following disadvantage - the high cost and laboriousness of manufacturing the tool, in particular the hardening tooth.

The technical result of the utility model is to reduce the cost and labor intensity of tool manufacturing.

This technical result is achieved by the fact that the reinforcing tooth is made composite and includes a chamfer made of steel in the form of a truncated cone, to the base of which is adjacent a hard alloy gage in the form of a spherical belt, which is a continuation of the chamfer, a continuation of the gage is the back part, made of steel in the form of a truncated cone with its base adjacent to the gauge part.

In FIG. 1 shows a general view of the tool for electromechanical burnishing, Fig. 2 shows a general view of the reinforcing tooth.

The tool for electromechanical turning includes a mandrel 1, in the front part of which a reinforcing tooth 2 is fixed. The end of the mandrel 1 is placed in the body 3 and fixed in it with a round nut 4 with the possibility of axial movement, a washer 5 following the round nut, a strain gauge weight sensor 6, a thrust cylinder 7 and a shank 8 screwed onto the end of the body, the end of which is connected to the Morse taper 9 through an insulating sleeve 10. The reinforcing tooth 2 is made composite and includes a chamfer 11 made of steel in the form of a truncated cone, to the base of which is adjacent a calibrating part 12 made of solid alloy in the form of a spherical belt, which is a continuation of the intake part 11, the continuation of the gauge part 12 is the rear part 13, made of steel in the form of a truncated cone with its base adjacent to the gauge part 12.

Work tools for electromechanical burnishing as follows. The calibrating tooth is brought to the hole to be machined. Turning on and off the current occurs automatically through the use of a strain gauge weight sensor. The load cell is configured in such a way as to turn on the electric current through the control system only at a certain pressure, i.e. while ensuring reliable contact, which eliminates distortion, increases the durability of the tool and eliminates rejects. The weight sensor sends a signal to the amplifier, the amplifier - to the comparison device (comparator), as a result of which either the on relay or the off relay is activated. A current with a density of 250…300 A/mm ² and a voltage of 4…6 V is passed through the point of contact of the hardening tooth with the surface being machined. °C, and with the subsequent axial movement of the mandrel relative to the axis of the hole, instant heat is removed into the body of the tool and workpiece and the hardened layer is formed. Due to the movement of the hardening tooth with interference, reliable electrical contact and smoothing of microroughnesses on the surface of the hole are ensured.

Making the gauge tooth composite will reduce the cost of its manufacture due to the use of cheaper material in less loaded areas and reduce the complexity of manufacturing by facilitating the machining process.

Claims (1)

A tool for electromechanical burnishing, containing a mandrel, in the front part of which a strengthening tooth is fixed, the end of the mandrel is placed in the body and fixed in it with a round nut with the possibility of axial movement, a washer located behind the round nut, a strain gauge weight sensor, a thrust cylinder and a shank screwed onto the end of the body , the end of which is connected to a Morse taper through an insulator sleeve, characterized in that the reinforcing tooth is made composite and includes a chamfer made of steel in the form of a truncated cone, to the base of which is adjacent a hard alloy gage in the form of a spherical belt, which is a continuation of the chamfer part, and the continuation of the gauge part is the rear part, made of steel in the form of a truncated cone with a base adjacent to the gauge part.

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