CN2229459Y

CN2229459Y - Improved high periodic wave heat treatment induction coil

Info

Publication number: CN2229459Y
Application number: CN94243571U
Authority: CN
Inventors: 张平雄
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-11-07
Filing date: 1994-11-07
Publication date: 1996-06-19
Anticipated expiration: 2004-11-07

Abstract

The utility model discloses an improved high periodic wave heat treatment induction coil. A distance taken from one end of an induction coil can carry out the torsion so as to form an upper annular part; the upper annular part can extend a distance downwards and inwards so as to form a first straight path; the bottom end of the first straight path can be bent into a lower annular part parallel to the upper annular part; the outside of the upper annular part and the lower annular part are respectively provided with a plurality of water jet holes according to the equal distance; the lower annular part can extend a distance upwards and inwards so as to form a second straight path; the second straight path can pass through the upper annular part to the other end of the induction coil; the second straight path is drilled with a plurality of water jet holes whose water jet direction faces to the first straight path; thereby, the utility model can once complete the high periodic wave heat treatment in two different area segments for the inner part of a hollow working component; therefore, the utility model can reach the effect of saving working time, reducing processing program, and lowering fraction defective of products.

Description

A kind of improved high frequency thermal treatment ruhmkorff coil

The utility model provides a kind of improved high frequency thermal treatment ruhmkorff coil, especially refers to a kind of hollow work-piece (as tubular body arranged inside, cylindrical body workpiece) internal fixation section be carried out the improvement of the heat treated ruhmkorff coil structure of high frequency surface hardening.

Usually the actuated element in mechanical; must make with shock-resistant with tough steel; but the contacted part of actuated element is wear-resistant again; can't reach this two kinds of requirements simultaneously with common heat treating method, have only and use the good steel of toughness and make its surface hardening just can reach this purpose.In all multi-methods of surface hardening, the induction hardening method is because control is easy, and speed reaches cleanliness of operation soon, and does not change the Chemical Composition of material surface, is widely adopted in surface hardening.

The high frequency heating principle is the ruhmkorff coil that passes to the water coolant protection in the workpiece placed around; but the workpiece of contact hardening not; when logical high frequency electric current; the alternation flux can take place around the ruhmkorff coil; during this kind alternation flux feed-through material; can produce induced current in the material; be called eddy current, the direction of the primary current of its direction and circulation ruhmkorff coil is opposite, and the degree of depth of eddy current and the frequency of electric current are inversely proportional to; the frequency that is electric current is higher; then the degree of depth is more shallow, so eddy current concentrates on material surface, eddy current can be generated heat according to Ohm's law; and the material surface temperature is raise rapidly; when the high stagnation point scope of heating arrival material, this heats lowers gradually, therefore can not cause material overheated; water coolant quenches to material surface simultaneously, finishes surface hardening.

In general, in the time of will carrying out the surface hardening processing to the fixedly processing section of small hollow workpiece, need elder generation that the stage casing of ruhmkorff coil is surrounded into an annular, and outwards equidistantly offer several tiny spout holes at this ring part, when handling workpiece preparation surface hardened processing section is moved to the ring part in ruhmkorff coil stage casing, logical water coolant is protected in the ruhmkorff coil, pass to the high frequency electric current again, cut off the power supply when making this section be heated to proper temperature, the water coolant of blowing water hole ejection this moment promptly to this processing section Cooling Quenching, is finished surface hardening; If when also having the second processing section to handle in the same workpiece, then needing again second section to be moved to above-mentioned position handles again, so then become and to do twice high frequency processing, two different sections in the same workpiece can be finished surface hardening, though this mode is feasible, but, or omitted another section and carried out the surface hardening processing if in operation careless careless mistake then very easily causes substandard products.An end of ruhmkorff coil can be got certain distance for this reason and go up ring portion around Qu Chengyi, and go up certainly to stretch downwards in the ring portion and establish certain distance (spacing of desire processing section) formation first straight way, and in the bottom of first straight way around the Qu Chengyi following ring portion parallel with last ring portion, and in the outside of upper and lower ring portion each equidistantly is provided with several spout holes, and descend ring portion inwardly upwards to be provided with second straight way certainly and pass the other end of ring portion, make the neither same section in the same workpiece of its energy primary treatment to ruhmkorff coil.

But when our desire is carried out the surface hardening processing to workpiece, workpiece is moved the ring portion up and down that the section up and down that makes desire processing corresponds respectively to ruhmkorff coil, and the two ends of self-induction coil feed water coolant, logical again high frequency electric current is when ruhmkorff coil, after the water coolant major part of being injected by ruhmkorff coil upper end is introduced into and cools off ring portion, penetrate by last ring portion spout hole, to processing upper curtate cooling, only there is the water coolant of minute quantity to arrive first straight way it is cooled off; And by the water coolant that the ruhmkorff coil the other end injects, from the spout hole ejaculation of ring portion down, also can't cool off first straight way behind second straight way of flowing through.Because ruhmkorff coil itself is made by copper pipe, add and feed the high frequency electric current when handling, do not have enough water coolants first straight way is cooled off this moment, workpiece working position spatial restriction can't add cooling line in addition in addition, so often cause ruhmkorff coil in use first straight way partly melt down because of cooling off deficiency.For above-mentioned reasons, the utility model provides a kind of improved high frequency thermal treatment ruhmkorff coil.

The purpose of this utility model provides a kind of improved high frequency thermal treatment ruhmkorff coil, especially refer to a kind of hollow work-piece (as tubular body arranged inside, simple shape body workpiece) internal fixation section be carried out the heat treated ruhmkorff coil of high frequency surface hardening, can in hollow work-piece, once finish the high frequency surface hardening thermal treatment of two different sections, and reach the effect of saving man-hour, reducing work program and reduction product disqualification rate.

The purpose of this utility model is to realize like this, get distance ring portion on Qu Chengyi at an end of ruhmkorff coil, and go up ring portion certainly and inwardly stretch downwards and establish a distance and form first straight way, and in the bottom of first straight way around the Qu Chengyi following ring portion parallel with last ring portion, each equidistantly is provided with several spout holes in the outside of ring portion up and down, inwardly upwards establish tool second straight way from following ring portion and pass the other end of ring portion, be drilled with the spout hole of several water outlet directions on this second straight way towards first straight way to ruhmkorff coil.

Through this utility model after improving, can once finish the high frequency surface hardening thermal treatment of two different sections to miniature workpiece, and can reach the effect of saving man-hour, reducing work program, because of the generation of workpiece deformation has been avoided in the reduction of work program, thereby reduced the product disqualification rate.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the utility model synoptic diagram.

Fig. 2 implements the state front view for the utility model.

Fig. 3 is the utility model vertical view

Fig. 4 is Fig. 2 partial enlarged drawing

Wherein: 23 times ring portions of ring portion 22 first straight ways, 24 second straight ways, 25 spout holes, 301 spout holes, 302 spout holes, 303 water coolants 40 on the workpiece 10 first processing sections 11 second processing sections 12 ruhmkorff coils 20 coils one end 201 coil the other ends 202

See also Fig. 1, Fig. 2, Fig. 3, Fig. 4, a kind of improved high frequency thermal treatment ruhmkorff coil of the utility model, its end 201 at ruhmkorff coil 20 is got segment distance ring portion 22 on Qu Chengyi, and go up ring portion 22 certainly and inwardly stretch downwards and establish the segment distance spacing of section (desire processing) and form first straight way 23, and in the bottom of first straight way 23 around the parallel following ring portion 24 of Qu Chengyi and last ring portion 22, and in ring portion 22 up and down, each equidistantly is provided with several spout holes 301 24 the outside, 302, and inwardly upwards establishing tool second straight way 25 passes the other end 202 of ring portion 22 to ruhmkorff coil 20 to descend ring portion 24 certainly, and is drilled with the spout hole 303 of several water outlet directions towards first straight way 23 on this second straight way 25.

But two different sections in the utility model primary treatment hollow work-piece in use, and the unlikely ruhmkorff coil that causes is because of cooling off the phenomenon that deficiency melts down, in the time will carrying out surface hardening and handle, workpiece 10 be moved and make the section 11 that to process

workpiece

10,12 correspond respectively to the ring portion up and down 22 of

ruhmkorff coil

20,24, and self-induction coil 20 201, water coolant 40 is injected at 202 two ends, feed the high frequency electric current again in ruhmkorff coil 20, water coolant 40 major parts that flowed into by 201 ends of ruhmkorff coil 20 this moment are introduced into and cool off after the ring portion 22, spout hole 301 by last ring portion 22 penetrates, to the first processing section, 11 Cooling Quenching, only there is the water coolant 40 of minute quantity to arrive first straight way 23 to its cooling, but simultaneously can be from the water spray of second straight way 25 also 303 directives, first straight way 23 to its cooling and other water coolant 40 still can arrive the following ring portion 24 that is positioned at bottom by the part of ruhmkorff coil 202 water coolants that end injects 40, and by spout hole 302 water outlets of ring portion 24 down, to the second processing section, 12 Cooling Quenching.

Claims

1, a kind of improved high frequency thermal treatment ruhmkorff coil, be by get distance ring portion on Qu Chengyi at an end of ruhmkorff coil, and go up ring portion certainly and inwardly stretch downwards and establish a distance and form first straight way, and in the bottom of first straight way around the Qu Chengyi following ring portion parallel with last ring portion, each equidistantly is provided with several spout holes and forms in the outside of ring portion up and down, ring portion is inwardly upwards established tool second straight way and is passed the other end of ring portion to ruhmkorff coil under it is characterized in that certainly, is drilled with several holes towards first straight way on this second straight way.