RU211468U1 - DEVICE FOR ELECTROMECHANICAL BURNING - Google Patents

Abstract

The utility model relates to the field of material forming, in particular to electromechanical burnishing, and can be used, for example, to restore the outer cylindrical surfaces of expanding parts. The device comprises a mandrel, a base plate and a stop, a latch and a movement drive mounted on it, while the base plate is made with holes, the stop and the latch are made with the possibility of reinstallation along the base plate using the said holes, and the movement drive is made in the form of a double-acting pneumatic cylinder, associated with the pneumatic control unit. The stop and the pneumatic cylinder are placed opposite each other at different ends of the base plate with the pneumatic cylinder rod located towards the stop, and the mandrel is installed through a copper terminal, made with the possibility of supplying process current to it, and a ceramic insulator at the end of the rod coaxially to it. The use of the utility model makes it possible to expand the technological capabilities of the device. 3 ill.

Description

The utility model relates to repair production, in particular, it can be used to restore the outer cylindrical surfaces of parts by thermal expansion.

A known mandrel machine (Patent SU No. 360175 A1, B23d 37/04 publ. 11/28/1972) contains a mandrel, a base plate and a stop, a latch and a movement drive installed on it.

The machine for mandrel has the following disadvantages:

- there is no possibility to restore the outer cylindrical surfaces of parts by thermal transfer;

EFFECT: enabling the restoration of the outer cylindrical surfaces of parts by thermal expansion.

The specified technical result is achieved by the fact that the base plate is made with holes, the stop and the latch are made with the possibility of reinstallation along the base plate using the said holes, and the movement drive is made in the form of a double-acting pneumatic cylinder with pressure gauges mounted on it, connected to a pneumatic control unit located on the base plate, while the aforementioned stop and pneumatic cylinder are placed opposite each other at different ends of the base plate with the pneumatic cylinder rod located towards the stop, and the mandrel is installed through a copper terminal, configured to supply process current to it, and a ceramic insulator at the end of the rod coaxially to it , moreover, a mounting cone is fixed on said stop coaxially to the mandrel, and said latch is configured to move transversely relative to the base plate to center the workpiece relative to the mandrel and the mounting cone.

In FIG. 1 shows a general view of the device for electromechanical burnishing, Fig. 2 - section of the connection of the mandrel with the rod of the pneumatic cylinder, in Fig. 3 - the process of restoring the part.

The device for electromechanical burnishing includes a mandrel 1, a base plate 2, a movable stop 3 and a movable latch 4 are installed on the plate with the possibility of moving in the longitudinal direction relative to the base plate 2. Holes are made on the base plate 2, which serve to reinstall the movable stop 3 and the movable latch 4 depending on the standard size of the parts to be restored. Opposite the movable stop 3, at the other end of the base plate 2, a double-acting pneumatic cylinder 5 with pressure gauges 6 and a pneumatic control unit 7 are installed. 5, a mandrel 1 is screwed on. A copper terminal 8 is fixed between the mandrel 1 and insulator 9. A mounting cone 10 is fixed on the movable stop 3 coaxially to the mandrel 1. movement in the transverse direction relative to the base plate 2.

The device works as follows. The part to be restored is placed between the movable stop and the mandrel, close to the mounting cone, then, using a pneumatic control unit and a double-acting pneumatic cylinder, the mandrel is pressed against the part to be restored with a force of 10 ... 20 N to ensure alignment. After that, the part to be restored is clamped with a movable clamp. Then, a technological current with a density j=200...250 A/mm ² is applied to the mandrel through a copper terminal and to the part to be restored, thereby heating the part to be restored to forging temperatures. Simultaneously with the supply of process current, the mandrel is moved along the pre-drilled hole with an interference fit i=0.3…0.6 mm by means of a pneumatic control unit and a pneumatic cylinder, thereby thermal dissipation and an increase in the outer diameter of the restored surface of the part are carried out.

The characteristics of the movement of the mandrel are controlled based on the readings of the manometers.

The use of a mandrel in the design of the device makes it possible to restore the outer cylindrical surfaces of parts by expansion.

The presence of the terminal makes it possible to supply electric current to the mandrel, and the presence of a ceramic insulator prevents the current from flowing towards the pneumatic cylinder.

The use of a double-acting pneumatic cylinder in the design provides the possibility of reciprocating movement of the mandrel, which is necessary for electromechanical burnishing of blind holes.

The use of a pneumatic control unit and pressure gauges allows you to control the force on the mandrel and the speed of its movement.

Claims (1)

A device for electromechanical mandrel, comprising a mandrel, a base plate and a stop, a latch and a movement drive mounted on it, characterized in that the base plate is made with holes, the stop and the latch are made with the possibility of reinstallation along the base plate using the said holes, and the movement drive is made in the form of a double-acting pneumatic cylinder with pressure gauges mounted on it, connected to a pneumatic control unit located on the base plate, while the aforementioned stop and pneumatic cylinder are placed opposite each other at different ends of the base plate with the pneumatic cylinder rod located towards the stop, and the mandrel is installed through a copper terminal , made with the possibility of supplying technological current to it, and a ceramic insulator at the end of the rod coaxially to it, moreover, an installation cone is fixed on the said stop coaxially to the mandrel, and the said latch is made capable of transverse movement relative to the base plate with the provision of prices triangulation of the workpiece relative to the mandrel and the mounting cone.

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