SU1581753A1 - Installation for heating and hardening ends of articles in electrolyte - Google Patents

Abstract

The invention relates to heat treatment of parts. The purpose of the invention is to improve the quality of processing and the productivity of the installation by ensuring that the gap between the part and the heater is constant by pre-basing the end of the part relative to the heater. The installation contains a dielectric bath 3 with inlet and outlet electrolyte nozzles, a telescopically mounted heater (H) 6 with slots 7 on the electrolyte supply nozzle 4 and with its movement mechanism and a part pre-based mechanism (D) 8 in the form of a rocker arm 9 with a clamping platform (BP ) 10 at one end and a roller (P) 11 at the other and a positioner with a copy groove 13 in which P 11 is located. The movement mechanism of the heater is made in the form of a double-arm lever (DR) 16 pivotally fixed in the bath with its drive moving, one the shoulder (P) 25 of which is made in the form of a fork with crackers placed in the slots 7, and the other P 18 is dielectric and pivotally connected to the beam 9 and through the dielectric plate 22 with the drive 17. The unit has a gripping device D 8 with a gripping mechanism ( M) 29. D 28 is let down over H 6, M 29 is opened, BP 10 is laid down under D 8 and it bases it on the butt. At the same time, a command is sent and the D 8 is clamped by the M 21, and the drive 17 removes the DR 16 clockwise, which in turn leads the BP 10 to the side, releasing the surface of the D 8 intended for hardening due to the movement of the P 11 through the copy slot 13. At the same time, P 25 DR 16 (but more slowly due to the difference in the sizes of P 18 and P 25) delivers upwards H 6 into the work zone to D 8. At the moment of contact D 8 with the electrolyte mirror, an electrical circuit is closed and heating is performed. Using this setup allows you to base a part on its given surface. As a result of using the mechanisms for moving both the heater and the clamping platform installed above it and associated with the cam, the device maintains a stable gap between the anode and the previously disassembled end of the part, which improves the quality of processing. 3 il.

Description

The invention relates to heat treatment of parts, mainly for surface hardening with heating in the electrolyte of the ends of the parts, and can be used in any industry of machine building.

The purpose of the invention is to improve the quality of processing and the productivity of the installation by ensuring the constancy of the gap between the heater and the part by preliminarily basing the end of the part relative to the heater.

Fig, 1 shows the device in the initial position, a general view; figure 2 - the same, in the working position; on fig.Z - section aa in figure 1.

The installation for heating and hardening the ends of the parts in the electrolyte contains frame 1, ceramic insulators 2, on which bath 3 is installed, the inside of the bath is insulated with dielectric material, inlet bottom 4 and outlet 5 of electrolyte are placed on the bottom of the telescopic electrolyte outlet 4 a plasma torch-heater 6 is installed, on the outer surface of which grooves 7 are made.

The installation consists of a device for pre-basing the butt end of the part 8 / mechanism for moving the plasma torch-heater 6 through the nozzle 4 and the device for gripping the part 8. The device for basing the part is designed as a rocker arm 9 with a basing bearing platform 10 at one end and a roller 11 at the other and a positioner 12 with a copy groove 13 in which the roller 11 is mounted. The positioner 12 is fixed on the frame 1. The movement mechanism is made in the form of a hinged pin in the bath 3 through the fork 14 and the axis 15 of the double-arm lever 16VH fixed on the frame 1 pneumatic 17. One shoulder 18 of the double-shouldered lever is made with a fluoroplastic spacer 19 with a groove 20 and pivotally connected through an axis 21 with a rocker arm 9 and through a dielectric plate 22 with a gear part and axle 23 installed in a groove 20, with a rod 24 of a pneumatic actuator 17. Other the shoulder 25 of the two shoulders arm is made in the form of a fork with bread crumbs 26 installed in the slots 7 of the plasma torch-heater 6.

The device capture parts 8 made in the form installed on the frame 1 through the bracket 27 of the pneumatic actuator 28. with a gripping mechanism 29 and with floating current collectors 30 at the end.

A current source (not shown) is connected to a plasma torch-heater 6 (anode) and to current collectors 30 (cathodes).

The installation works as follows.

The negative potential of the direct current voltage is applied to the floating current collectors 30 of the gripping mechanism 29, and the positive potential to the plasma torch-heater 6.

In the initial position (Fig. 1), the components 8 are alternately conveyed by a driving conveying device (not shown). In this case, the gripping mechanism 29 is opened, the clamping element is provided by the pad 10 under the part 8, and the plasma torch 6 is omitted (FIG. 1).

An initial position sensor (not shown) gives a command, and the component 8 located on the base plate 10 is clamped by a gripping mechanism 29 while being centered.

A command is then given to the pneumatic drive 17, which through the rod 24 and the plate 22 turns the double-arm lever 16 clockwise.

The shoulder 18 of the two shoulders lever 16 retracts the rocker arm 9 with the clamping platform 10 along the trajectory defined by the copier groove 13 of the positioner 12.

At the same time, the shoulder 25 of the two shoulders lever 16 (but more slowly due to the difference in the size of the shoulders 18 and 25), the plasma torch-heater 6 rises to the working position to the part 8. At the same time, the target gap between the anode of the plasma torch and the end of the part is provided in its final position (see 2). At the moment of contact of the end face of the part 8 with the electrolyte mirror emanating from the plasma torch 6, an electrical circuit is closed (the plasma torch heater is + and the part is) and the end of the part 8 is heated, and when the DC is turned off. the same flow of electrolyte.

After the end of the processing cycle, the double-arm lever 16 rotates counterclockwise, the drive of the clamping platform 10 and the plasma torch-heater 6 to the initial position (Fig. 1). The gripping mechanism 29 is then reset.

pneumatic actuator 28. The machined part is transported from the quenching position.

relative to the heater, made in the form of a rocker arm with a base plate at one end and with a roller on the other and fixed on the frame of the donor with a coping groove in which the roller is installed;

and in its place is served next. The cycle is over. Then the cycle of quenching pov-, 50 electrolyte is located in the bottom of the bath

and on it is telescopically mounted

is lost.

During operation, the electrolyte is continuously supplied through the nozzle 4 into the plasma torch-heater 6 and freely flows out of the bath 3 through the drain nozzle 5 into the sump tank (not shown).

Dielectric plate 22 with serrated portion (insulating material,

55

a heater with a groove made on its outer surface, and the heater displacement mechanism is made in the form of a two-arm lever hinged in the bath and its rotation drive, while one lever arm is made of a dielectric and pivotally connected to the rocker arm and through

five

0

for example, fluoroplast-3 or 4) is necessary to reduce leakage current through the rod 24 to the pneumatic actuator 17 and housing 1, which are at a potential of minus -, as well as from safety requirements. The toothing portion of the plate 22 allows cutting off electrolyte streams arising from splashes during operation of the device, as well as flows along the two arms of the lever 16 falling onto the plate 22.

This installation allows you to improve the quality of hardening of parts of complex configuration by providing a stable gap between the anode and the end of the part by preliminarily basing the part over the anode and synchronizing the movement of the mechanism ensuring the positioning position of the base plate with the plasma torch moving in automatic mode, which increases productivity.

Claims (1)

25 claims Installation for heating and hardening the ends of the parts in the electrolyte, mainly fists of tunneling machines, containing the frame, the bath with the electrolyte supply and discharge nozzles, the heater with its movement mechanism, the device for gripping and holding the part and the current source connected to it and the heater And so that, in order to improve the quality of processing and the performance of the installation by ensuring the constancy of the gap between the part and the heater by preliminarily basing the end of the part relative to agreater, the installation is equipped with a device for the base of the part 0 five 0 with respect to the heater, made in the form of a rocker with a clamping platform at one end and with a roller on the other and fixed on the frame of the positioner with a groove groove in which the roller is installed, the supply nozzle electrolyte located in the bottom of the bath a heater with a groove made on its outer surface, and the heater moving mechanism is made in the form of a two-arm lever hinged in the bath and driving it moving, while one lever arm is made of dielectric and pivotally connected to the rocker arm and through the die-1-rod with the crackers placed in the grooves of the water, and the other shoulder in the form of a heater. eight | Speed ele gf t roles t a Fig 2  $ 05 ts 27 28 Aa Fig.Z