CN201006887Y

CN201006887Y - Step axis parts single-circle semi-ring type intermediate frequency induction apparatus

Info

Publication number: CN201006887Y
Application number: CNU2007201227060U
Authority: CN
Inventors: 贺兵; 刘忠; 王天祥; 吴均
Original assignee: GUIZHOU AEROSPACE HONGGUANG MACHINERY MANUFACTURING Co Ltd
Current assignee: GUIZHOU AEROSPACE HONGGUANG MACHINERY MANUFACTURING Co Ltd
Priority date: 2007-01-05
Filing date: 2007-01-05
Publication date: 2008-01-16
Anticipated expiration: 2017-01-05

Abstract

A single-turn semi-cyclic medium-frequency inducer for setback-type shaft elements comprises an effective ring, a connecting pipe, a contact plate, a main blow box and an auxiliary blow box, wherein the connecting pipes is connected with the effective ring, the main blow box and the auxiliary blow box are respectively fixed to the front and two sides of the effective ring which face the heating area of elements, the contact plate is connected with a medium-frequency machine transformer, and the effective ring is a semi-cyclic hollow component consisting of a lower half ring, an upper half ring and a heating column. The utility model is good in heating effects and can achieve perfect distribution of quench hardening layers, and simultaneously the utility model has the advantages that the producing accuracy requirement of the utility model is low, the utility model is good in adjustability and stable and reliable in working properties, and the like. The utility model is suitable for usage of medium-frequency quenching heat treatment for setback-type shaft elements.

Description

Step axial workpiece single turn semi-ring formula intermediate frequency inductor

One, technical field

The utility model relates to a kind of induction heater that is used for the medium frequency quenching of step axial workpiece, belongs to surface induction heat treatment technics field.

Two, background technology

Surface induction thermal treatment is the principle of utilizing electromagnetic induction, at metallic surface generation eddy current part is heated rapidly to and realizes hard-faced processing method more than the transformation temperature, has characteristics such as efficient, energy-conservation.Part through surface induction hardening has not only improved surface hardness, and by matching with the compressive stress state on surface and quenched and tempered organization of heat treated in advance heart portion, can obtain very high fatigue strength and wear resistance, significantly improves the work-ing life of part.Surface induction thermal treatment can be divided into three kinds of high frequency, intermediate frequency, power frequencies etc. according to the height of frequency, because the thermal treatment of intermediate frequency surface induction can provide the ideal depth of hardening zone, therefore utilization is the most extensive.Wherein intermediate frequency inductor is the energy output terminal of surperficial medium frequency induction heat treatment equipment, is directly connected to the heats of part, is key, the important devices of medium frequency induction heat treatment equipment.Intermediate frequency inductor generally can be divided into loop inductor and multiturn inductor block again, and wherein loop inductor design, simple for production is used more general.

Step axial workpiece 1 quenching position as shown in Figure 1 generally comprises cylindrical section 4, circular arc R transition section 2 and platform section 3 three parts, requires quench-hardened case to seamlessly transit at three positions.In existing technology, mainly adopt the ring-type inductor block to carry out the continous way heating, its heating principle has the little characteristics of power demand based on annular effect.But the ring-type inductor block has its weak point: have sharp angle effect and part section is changed sensitivity etc.When heating step axial workpiece, temperature is higher near the circular arc R transition section, be easy to generate overheated, burning, and platform section heats is not good.After the quenching, easily crack, hardened layer skewness, circular arc R transition section easily form the bulge distortion, the part tube wall might be quenched when serious and wear.Because circular arc R transition section and platform section position area are bigger, the heating time-delay at this position can be very long, the danger of burning inductor block arranged, thereby the making of inductor block is had relatively high expectations.

Three, summary of the invention

The purpose of this utility model is the deficiency that overcomes above-mentioned technology, provide a kind of working accuracy height, manufacturing cost is lower, debugging is easy, serviceability is safe and reliable step axial workpiece single turn semi-ring formula intermediate frequency inductor, to be used for the heat treatment process of step axial workpiece.

The purpose of this utility model realizes by following approach:

Step axial workpiece single turn semi-ring formula intermediate frequency inductor of the present utility model is made up of coil, pipe connecting, contact plate, main jet water tank, auxilliary several parts of water spray chamber, pipe connecting links to each other with coil, main jet water tank, auxilliary water spray chamber are provided with respectively and are fixed on front and the both sides of coil towards the part heating region, contact plate finally is connected with intermediate frequency lathe transformer, wherein the major parts coil is by descending semi-ring, last semi-ring and heated beam to combine, add magnetizer on following semi-ring and the heated beam, whole coil is semi-ring formula hollow form.

The hardened layer distribution design of choosing according to part of coil height requires to decide, be generally about 120% of hardened layer distribution length L, the upper and lower semi-ring diameter of coil is axle tube cylindrical section diameter+6mm, following semi-ring (51) length is got 50～60% of circumference, and last semi-ring (52) length is got 40～50% of circumference.

Adopted the utility model of technique scheme, its heating principle is based on approach effect, neither there is sharp angle effect, also insensitive to the part section variation, during heating step axial workpiece, each position temperature is even, the heating of platform section position in order, can satisfy the case depth requirement of 2～8mm after the quenching, hardened layer is evenly distributed, and has solved circular arc R transition section quenching crack and has easily formed the distored problem of bulge.Because heating principle of the present utility model is based on approach effect, so its debugging mainly is to adjust inductor block coil and step axial workpiece relative gap, and the gap is more little, and heating efficiency is high more.Semi-ring type open by design of the present utility model can provide very big gap to adjust the space, can obtain various required heats by debugging on the one hand, satisfy different hardened layer distribution design requirements, on the other hand when error appears in the inductor block making, can be compensated by suitable debugging, this has just reduced making accuracy requirement of the present utility model.Therefore, the utility model has solved the deficiencies in the prior art part fully, can obtain ideal quenching post-hardening layer and distribute, and also has low, the advantages such as adjustable good, stable and reliable working performance of the accuracy requirement of making simultaneously.

Four, description of drawings

Fig. 1 is a step axial workpiece structural representation;

Among the figure: 1-step axial workpiece, 2-platform section, 3-circular arc R transition section, 4-cylindrical section.

Fig. 2 is the utility model step axial workpiece single turn semi-ring formula intermediate frequency inductor structural representation;

Among the figure: 5-coil, 6, the auxilliary water spray chamber of 7-, 8-main jet water tank, 9-pipe connecting, 10-water pipe, 11-contact plate.

Fig. 3 is a coil structural representation in the utility model step axial workpiece single turn semi-ring formula intermediate frequency inductor;

Among the figure: semi-ring, the last semi-ring of 52-, 53,54-heated beam, 55-magnetizer under 5-coil, the 51-.

Five, embodiment

As shown in Figure 2, step axial workpiece single turn semi-ring formula intermediate frequency inductor of the present utility model is made up of coil 5, pipe connecting 9, contact plate 11, main jet water tank 8, auxilliary water spray chamber 6, more than 7 parts, pipe connecting 9 links to each other with coil 5, main jet water tank 8, auxilliary

water spray chamber

6,7 are provided with respectively and are fixed on front and the both sides of coil 5 towards the part heating region, contact plate 11 finally is connected with intermediate frequency lathe transformer, major parts coil wherein is by descending semi-ring 51, last semi-ring 52 and heated

beam

53,54 to combine, and whole coil parts are hollow form.In order to improve heating efficiency, under coil, install magnetizer 55 on semi-ring, the heated beam additional, what descend wherein that semi-ring 51 installs additional is the special-shaped magnetizer that periphery is provided with hypotenuse, promptly the peripheral shape of this magnetizer and heat treated axial workpiece adapt, do not interfere with after guaranteeing magnetizer and following semi-ring 51 cooperating, and can take into account the heats at part circular arc R transition section and platform two positions with the part cylindrical section.

Making adds man-hour, adopts the red copper bar to be processed with and imitates circle semi-ring down, and semi-ring, heated beam, pipe connecting adopt the copper tube material machine-shaping of wall thickness 1.5～2.0 on the coil; Contact plate 11 adopts the copper sheet processing of thickness 6～8mm; Adopt the above-mentioned parts of brazing assembly welding to obtain inductor body then.Main jet water tank, auxilliary water spray chamber adopt copper alloy plate after pincers, cold-working processing, and the assembly welding moulding is also joined weldering with water pipe 10.The arrangement mode of spout hole is spacing 3mm, evenly is staggered on main jet water tank, the auxilliary water spray chamber, and auxilliary water spray chamber bore angle should guarantee to assemble the back and point to part heating position.The main jet water tank is pulled with the contact plate screw by two insulation and is connected, and two auxilliary water spray chambers are connected by screw with the main jet water tank.After the assembling, guarantee the insulation of water spray chamber assembly and inductor body.Magnetizer adopts 0.2～0.5mm siliconized plate stamping-out to form, and carries out bonderizing before the installation earlier, the back is installed solidifies with Resins, epoxy or insullac.

The utility model adopts heating mode simultaneously, therefore the lathe output rating is had certain requirement, and specific power reaches 0.18kw/cm ²More than can obtain good heating quenching effect.During debugging, guarantee earlier about coil and part relative gap 3mm, after the energising, according to heating state each gap, position is done suitably to adjust again.Press the difference of diameter of part size heat-up time, be generally 10～50 seconds, the spray quenching medium time-delay 30～60 seconds of quenching.

Claims

1. step axial workpiece single turn semi-ring formula intermediate frequency inductor, by coil (5), pipe connecting (9), contact plate (11), main jet water tank (8), auxilliary water spray chamber (6,7) several parts are formed, pipe connecting (9) links to each other with coil (5), main jet water tank (8), auxilliary water spray chamber (6,7) setting is fixed on front and the both sides of coil towards the part heating region respectively, contact plate (11) is connected with intermediate frequency lathe transformer, it is characterized in that: coil (5) is by following semi-ring (51), last semi-ring (52) and heated beam (53,54) the semi-ring formula hollow form assembly that combines, described semi-ring (51) and heated beam (53 down, 54) add magnetizer (55) on.

2. by the described step axial workpiece of claim 1 single turn semi-ring formula intermediate frequency inductor, it is characterized in that: the magnetizer that installs additional on the following semi-ring (51) is the special-shaped magnetizer that periphery has hypotenuse.

3. by the described step axial workpiece of claim 1 single turn semi-ring formula intermediate frequency inductor, it is characterized in that: coil (5) highly is 120% of part hardened layer distribution length, the upper and lower semi-ring diameter of coil is diameter of part+6mm, following semi-ring (51) arc length is 50～60% of a circumference, and last semi-ring (52) arc length is 40～50% of a circumference.