CN201010672Y - Heating mechanism used for rail hardening of workpiece with rails - Google Patents

Abstract

The utility model relates to a heating device for track quenching for work piece with track. A round ring (1) has two unclosed ends that are extended upwardly a certain distance and then parallel with the round ring, a plurality of ceramic pipes (2) with slightly larger internal diameter than the diameter of the round ring are sheathed on the round ring (1), and the ceramic pipes (2) and the round ring are completely twisted by an insulating tape. The utility model is used for local high frequency quenching of work piece with track in an organic medium to improve the texture and performance of the track material of the work piece after quenching, the work piece after quenching has low deformation, and the track surface after quenching has no soft spot. The utility model has wide application range, and can be safely used.

Description

Be used for the heating unit that belt track workpiece middle orbit quenches

Technical field

The present invention relates to a kind of quenching heating unit, particularly a kind of heating unit that is used for the quenching of belt track workpiece middle orbit.

Background technology

In the industrial production, often need heat-treat, with tissue and the mechanical property of improving the metallic surface the metallic surface.

Raceway or track were (as using material 30CrNi in some part need be processed ₂The part that MoVA makes), is tissue and the mechanical property of improving the metallic surface, often need locates to carry out partial heat treatment raceway in it (or track).At present, described parts locally high-frequency quenching there are following four kinds of modes, 1. heating quenching method: after part raceway (or track) heats in inductor block, water spray or the cooling of other organic medium the aperture from inductor block immediately, also have and from inductor block, take out part, whole cooling in water or oil or organic medium.2. continuous heating quenching method: part is placed on the rotating disk, and near arrangement, rotating disk drives the part rotation before and after inductor block and the spray nozzle, the sensed general ability of raceway (or track) portion rapid heating, and water jet is injection water or organic medium cooling subsequently.Above-mentioned the 1., 2. two kinds of quenching method are with induction heating process and quenching process separately, because in the induction heating process, raceway (or track) surface is air dielectric abrim, the high frequency short period of time add pine for easily by air in oxidation, raceway (or track) interior surface layers local temperature sharply raises, thermal stresses increases, and causes raceway (or track) quenching after strain bigger, greatly reduces part in the tolerance of dimension of the accurate control of the former machining of thermal treatment and the ovality tolerance in garden.3. embedding oil quenching method of cooling: load coil is imbedded in the quenching oil cooling of raceway (or track) one side heating one side.Slower owing to oil cooling speed, flash-point is low, and burning even blast easily take place in quenching, and only is suitable for raceway (or track) quenching of alloy steel material, is had soft spots by on the orbital plane of quenching, and effect is bad, and range of application is narrow.4. quench method under the High-frequency water:, carry out heating quenching under water with inductor block and the whole submergeds of part.Be only applicable to carbon steel (as 45,50, T8, T10, T12 etc.), crackle and soft spots occur in quench zone easily, raceway (or track) is heated the coil contact and electrothermal burn easily.

Summary of the invention

The purpose of this invention is to provide a kind of heating unit that belt track workpiece middle orbit quenches that is used for, it is used at organic medium belt track workpiece local high-frequency being quenched, the tissue and the performance of the workpiece rail material after the quenching are improved, the back workpiece deformation that quenches is little, the orbital plane of being quenched does not have soft spots, applied range has advantage safe in utilization.

The realization the technical solution of the utility model is:

A closed circle does not seal and is parallel to annulus again after two ends are extended one section straight up, and insulating tape twines vitrified pipe and annulus fully, is with several internal diameters vitrified pipe bigger slightly than this annulus on the annulus.

The utility model is with in the raceway (or track) in this device embedding part, by raceway (or track) in the normal process electrical parameter energising heated components, interior raceway (or track) internal surface is in temperature-rise period, form one deck steam film, steam film is heated the surface with the interior raceway (or track) of part and separates with organic medium, therefore the heat affected zone in raceway (or track) quenching zone is less in the part, and the part thermal stresses is less, and raceway (or track) quenching strain is little in the back part that quenches.Annulus and vitrified pipe are insulated silk ribbon and twine fully, and advantage safe in utilization is arranged.The ceramic insulating tube that is connected in series on the annulus circumference has been guaranteed raceway gap in annulus and the part, guarantees that raceway does not contact with annulus and the electrode burn in the part, and can there be soft spots in the workpiece orbital plane of being quenched simultaneously, and quenching effect is good.The utility model device can be applied to carbon steel and steel alloy, so applied range.

Description of drawings

Fig. 1 and Fig. 4 are the heater coil structure iron of the utility model patent;

Fig. 5 is the sectional view of A portion among Fig. 4;

Fig. 2 is the space diagram of heater coil normal mounting;

Fig. 3 is the sectional view of raceway heater coil site plan in the part;

Among the figure: 1 is annulus, and 2 is vitrified pipe, and 3 are the quenching workpiece, and 4 is interior raceway quenching zone, 5 quenchant liquid, and 6 is insulating tape.

Embodiment

With the material is 30CrNi ₂The workpiece of 10 millimeters circular arc width of raceway ￠ 182 centerline is an example in the MoVA, quench part, and present embodiment is described.

Referring to Fig. 1, Fig. 2 and Fig. 4, selecting diameter for use is that 5.8 millimeters copper pipe is made into the annulus 1 that does not seal at two ends, not sealing of annulus is parallel to this annulus after two ends are extended one section straight up again, and this height straight up is more than or equal to the height of the container of splendid attire quenching solvent; Twining insulating tape 6 (as asbestos silk ribbon etc.) on the annulus.Be with several internal diameters vitrified pipe 2 bigger slightly than this annulus on the annulus 1, vitrified pipe 2 internal diameters are greater than the external diameter of annulus 1, make between vitrified pipe and the annulus gappedly, can prevent from because of temperature variation produces to expand with heat and contract with cold vitrified pipe 2 to be broken at the time annulus 1 of heating.The quantity of vitrified pipe can be chosen according to the diameter of annulus; Adopt four vitrified pipes to be placed on the annulus in the utility model with the form of five equilibrium annulus.The internal diameter of described vitrified pipe 2 is 7 millimeters, and external diameter is 10 millimeters, highly is 10 millimeters.Vitrified pipe 2 external diameters are equal to or slightly less than the diameter of the quenching workpiece that has raceway (or track), can touch raceway (or track) surface of workpiece to guarantee vitrified pipe, avoid annulus to contact with raceway simultaneously, guarantee the quenching quality of raceway.

Adopt not closed circle in this device, annulus 1 can be enlarged or dwindle, be convenient to this device is embedded the interior raceway (or track) of quench part.

Insulating tape 6 (as the asbestos silk ribbon etc.) is with vitrified pipe 2 and annulus twines fully and fixing, can prevent that in the part burnt by round loop electrode in raceway (or track) surface.

Referring to Fig. 3 and Fig. 5, the annulus that installs 1 is embedded before the quench part 3 the interior raceway of bearings quench in the zone 4, be 30CrNi with the material of this device of embedding ₂The workpiece 3 of MoVA together immerses in " Houghton AQ364 " quenchant liquid 5, concentration of medium 19%～21%.Using the hand-held sugar amount of WYT-15 type refractometer to measure refraction coefficient is 7.6～8.4.This device connects outside cylinder manifold, connects the water-cooled tube of annulus 1, gets final product by raceway (or track) 4 in the normal process electrical parameter energising heated components.

The above is preferred embodiment of the present utility model only, is not to be used for limiting practical range of the present utility model; If do not break away from spirit and scope of the present utility model, the utility model is made amendment or is equal to replacement, all should be encompassed in the middle of the protection domain of claim of the present utility model.

Claims (3)

1. one kind is used for the heating unit that belt track workpiece middle orbit quenches, it is characterized in that: a closed circle (1) not, do not seal and be parallel to annulus again after two ends are extended one section straight up, insulating tape twines vitrified pipe (2) and annulus fully, is with several internal diameters vitrified pipe bigger slightly than this annulus (2) on the annulus (1).

2. a kind of heating unit that belt track workpiece middle orbit quenches that is used for according to claim 1 is characterized in that: vitrified pipe (2) the five equilibrium annulus that is with on the annulus (1).

3. a kind ofly be used for the heating unit that belt track workpiece middle orbit quenches according to what claim 1 was transported, it is characterized in that: vitrified pipe (2) external diameter is equal to or slightly less than by the interior raceway of quench part.

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