RU2251578C2 - Automatic machine for quenching bolt heads at hf-current heating of them - Google Patents

Abstract

FIELD: heat treatment of metals.

SUBSTANCE: automatic machine includes hopper type charging device provided with tilter; pin type conveyer, accumulator, drive unit, feeding disc with limiting bracket, inductor, quenching tank. Feeding disc is built-up one; it has outer ring with radial grooves and inner disc. Discs are mounted in lateral surfaces of grooves. Outer ring and inner disc have rotation drive unit for rotating them in the same direction with different angular velocity. Limiting bracket is in the form of flexible metallic belt embracing outer ring in heating zone for forcing rods of bolts to inner disc. Said bracket includes set of weights for adjusting forcing effort.

EFFECT: possibility for automating operation of charging hopper with bolts, enhanced operational reliability of automatic machine, uniform hardenability and high-quality quenching of bolt heads.

4 dwg

Description

The invention relates to the field of heat treatment of metals, in particular to the design of devices for hardening parts by induction.

A known machine for hardening with heating of the HDTV bolt heads, containing a bunker-loading device, a drive, a drive unit, a feed disk and an inductor [1].

The disadvantage of this machine is the lack of: mechanized loading of the hopper with hardened bolts; loading the drive with already oriented bolts, which reduces the reliability of the machine; rotation of the bolts during their heating, which leads to their uneven heating and, as a consequence of this, to uneven hardenability; uniform cooling and a certain cooling time of the bolts for quality hardening.

The technical result achieved in the claimed invention consists in: mechanization of the hopper loading with bolts to be hardened; improving the reliability of the machine; obtaining uniform hardenability of the bolt heads and their quality hardening.

The specified technical result is achieved by the fact that the hardening machine with heating the high-frequency bolt heads containing a hopper-loading device, a drive, a drive unit, a feed disk and an inductor is equipped with a finger conveyor and a quenching tank, the hopper-loading device is equipped with a tilter, and the feeding disk is made composed of an outer ring with radial grooves on which side rollers are mounted, and an inner disk having a rotational drive in one direction with different angular velocity, and is equipped with the boundary bracket in the form of a flexible metal tape, covering the outer ring in the heating zone for pressing the bolt rods to the inner disk, with a set of weights for regulating the clamping force.

Figure 1 shows a General view of the machine; figure 2 - view A; figure 3 - remote element B; figure 4 is a section bB.

The machine contains a hopper-loading device with a tilter 1, a finger conveyor 2, a drive 3, a drive unit 4, a feed disk 5, an inductor 6, a hardening tank 7. The feed disk consists of an outer ring-separator 8, an inner disk 9. On the side surfaces of the outer rings are mounted on the axes of the rollers 10. A flexible metal strip 11 is installed in the heating zone of the bolts by the inductor 12. The ring and disk rotate from one electromechanical drive 13, but due to the difference in gear ratios of the gear pairs 14, 15, 16, their rotation in one direction enii occurs with varying angular velocity.

The machine works as follows. The container with the bolts to be hardened is installed on the tilter 1. The tilter tilts the container at a certain angle so that part of the bolts spills out into the hopper, filling it. From the hopper, the finger conveyor 2 captures the bolts, orientes them with their heads up and feeds into the drive 3. From the drive, the bolts under their own weight fall into the radial grooves of the separator ring 8, the rotating disk of the feed 5. The ring, rotating, moves the bolts around the circle from the loading zone through the working zone of their heating to the discharge position in the quenching tank 7. In the zone of heating of the bolt heads by inductor 12, the bolt rods are pressed by a flexible metal tape 11 to the internal disk 9. The pressing force is regulated by the selection of weights. The torque acts on the bolts, the forces of which arise at the points of contact of the bolt rod with the disk and tape. The separator ring rotates counterclockwise, so the bolts are thrown onto the rollers 10 grooves of the ring, which reduces the likelihood of the bolt slipping, the inner disk also rotates counterclockwise, so the bolts in contact with the internal disk rotate clockwise and, as a result, roll along metal tape. As the hopper is emptied, the tilter tilts to a larger angle and fills the hopper with another portion of bolts.

Using the inventive machine will significantly improve the quality of hardened bolts, in particular such mass products as shoe bolts of tracks of industrial tractors.

Sources of information

1. A.S. USSR SU 86385 A1, 6 C 21 D 1/10, 12.24.1960.

Claims (1)

An automatic hardening machine with heating of the high-frequency bolt heads containing a hopper-loading device, a drive, a drive unit, a feeding disk and an inductor, characterized in that it is equipped with a finger conveyor and a quenching tank, the hopper-loading device is equipped with a tilter, and the feeding disk is made up of the outer ring with radial grooves, on the side surface of which the rollers are mounted, and the inner disk having a rotation drive in one direction with different angular velocity, and is equipped with a restrictive bracket in the form a flexible metal tape covering the outer ring in the heating zone for pressing the bolt rods to the inner disk, with a set of weights for adjusting the clamping force.

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