CN105479124A - Processing method for aluminum die for rotor die casting - Google Patents

Abstract

The invention provides a processing method for an aluminum die for rotor die casting. The processing method is characterized by comprising the following steps that (a) H13 steel is subjected to rough turning according to a die drawing, a 0.4 mm allowance is reserved for the radial dimension of machining, a 0.3 mm allowance is reserved for the axial dimension, then a threaded hole is machined according to drawing requirements, and a pin hole is positioned; (b) after rough machining is finished, the die is subjected to stress release treatment, and heat preservation is conducted at the temperature of 520-540 DEG C for 3-4 hours; (c) after stress release treatment is finished, the die is subjected to quenching at the temperature of 650 DEG C for 1.5 hours and then at the temperature of 850 DEG C for 1.5 hours, then heated to 1020 DEG C for 2.5 hours, and subjected to air cooling for one hour; (d) after quenching is finished, the die is subjected to tempering at the temperature of 580 DEG C; (e) after thermal treatment is finished, the die is subjected to finish machining, and then mirror polishing is conducted on a cavity; and (f) after the mirror polishing is finished, the die is subjected to carbonitriding treatment.

Description

A kind of processing method of motor rotor die-casting aluminum die

technical field:

The invention belongs to mould manufacturing field, particularly relate to a kind of processing method of motor rotor die-casting aluminum die.

background technology:

Existing asynchronous motor mouse cage cast aluminium rotor generally adopts pressure cast aluminium die to carry out the mode of cast aluminium, because therefore pressure in pressure cast aluminium process have higher requirement to the intensity hardness of die casting aluminium mould very greatly, along with the casting outward appearance of development people to rotor of society also has higher requirement.Die casting aluminium mould in the past, in manufacture and subsequent treatment process often Shortcomings part, causes the outward appearance of mould or life-span to there is appearance poor, and the problem that the life-span is short.

summary of the invention:

The object of the invention is to overcome above-mentioned weak point of the prior art and a kind of processing method of casting the motor rotor die-casting aluminum die that outward appearance is good, the life-span is long is provided.

The processing method of motor rotor die-casting aluminum die provided by the invention, is characterized in that following flow process:

A), by H13 steel carry out rough turn turnery processing according to mould drawing, the size radial direction of processing retains 0.4mm surplus, axially retains 0.3mm surplus, then according to drawing requirement thread mill drilling, and dowel hole;

B), by mould complete for roughing carry out destressing process, 520 ~ 540 DEG C are incubated 3 ~ 4 hours;

C), by mould complete for destressing quench, first through 650 DEG C 1.5 hours, 850 DEG C 1.5 hours, be then heated to 1020 DEG C 2.5 hours, then air cooling 1 hour;

D), the complete mould of quenching is carried out temper, temperature 580 DEG C;

E), by mould fine finishining complete for heat treatment, then mirror finish process is carried out to die cavity;

F), the mould after mirror finish process is carried out carbo-nitriding process.

The invention has the advantages that the little and suitable surface quality that can ensure following process of surplus that roughing is stayed, and save cutter and drop into.Destressing process can ensure to there will not be larger distortion when follow-up Quenching Treatment.Temper can reduce die hardness, and the toughness improving mould prevents much higher hard from die life is reduced.The fine finishining of mould, and mirror process effectively can improve product surface quality.And reduce sticking to mould possibility.The wearability that carbo-nitriding can improve die surface improves die life further.

detailed description of the invention:

The processing method of motor rotor die-casting aluminum die, is characterized in that following flow process:

A), by H13 steel carry out rough turn turnery processing according to mould drawing, the size radial direction of processing retains 0.4mm surplus, axially retains 0.3mm surplus, then according to drawing requirement thread mill drilling, and dowel hole;

B), by mould complete for roughing carry out destressing process, 520 ~ 540 DEG C are incubated 3 ~ 4 hours;

C), by mould complete for destressing quench, first through 650 DEG C 1.5 hours, 850 DEG C 1.5 hours, be then heated to 1020 DEG C 2.5 hours, then air cooling 1 hour;

D), the complete mould of quenching is carried out temper, temperature 580 DEG C;

E), by mould fine finishining complete for heat treatment, then mirror finish process is carried out to die cavity;

F), the mould after mirror finish process is carried out carbo-nitriding process.

Claims (1)

1. a processing method for motor rotor die-casting aluminum die, is characterized in that following flow process:

A), by H13 steel carry out rough turn turnery processing according to mould drawing, the size radial direction of processing retains 0.4mm surplus, axially retains 0.3mm surplus, then according to drawing requirement thread mill drilling, and dowel hole;

B), by mould complete for roughing carry out destressing process, 520 ~ 540 DEG C are incubated 3 ~ 4 hours;

C), by mould complete for destressing quench, first through 650 DEG C 1.5 hours, 850 DEG C 1.5 hours, be then heated to 1020 DEG C 2.5 hours, then air cooling 1 hour;

D), the complete mould of quenching is carried out temper, temperature 580 DEG C;

E), by mould fine finishining complete for heat treatment, then mirror finish process is carried out to die cavity;

F), the mould after mirror finish process is carried out carbo-nitriding process.