DD144794A1 - AT THE SAME TIME INDUCTION HARDENED MULTIPLE HAERTEZONEN DIFFERENT FORM - Google Patents

Abstract

The invention relates to simultaneous induction hardening of medium-hardenable components of the machine and Vehicle construction with several hardness zones strongly divergent Shape, for example, cream wheels with teeth to be hardened and too hardening hub surfaces. A method is presented according to which simultaneous hardening of all hardness zones of one or more workpieces is possible by using suitable arrangements and process parameters be used. The advantages of using this method lie in the fact that by the multiple use with a .Method step significant working time and energy savings and less equipment.

Description

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Simultaneous induction hardening of several hardening zones, different shapes.

2. Area of application.

The invention relates to the inductive surface hardening of workpieces with hardening zones of different shape from the mechanical engineering and vehicle construction, in the present case to rotationally symmetrical components, e.g. with a toothing to be hardened as the first hardening zone and a circular start-up surface as the second hardening zone, as in the case of toothed wheels with helical or helical teeth.

3. Characteristic of the known technical solutions The simultaneous heat treatment by means of Mehrfachihduktcren. or line inductors on components having a plurality of uniform or formally similar hardness zones may be considered more practical. State of the art are considered.

A heat treatment of components with several hardness zones, very different shape is due to the complicated and expensive determination of process parameters. and suitable facilities, and for reasons of more complicated reproducibility, mainly by temporally successive heat treatments of the individual. Hardness zones, such as on rotary table hardening machines with correspondingly arranged heating and quenching stations; "Klepzig Specialist Reports, Issue 7, / 73".

The area of simultaneous inductive. Heat treatment; of several hardness zones of very different shapes on the same component after the 'total surface heating process is very diverse and still relatively undeveloped, especially

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in the field of frequencies below 1.0 000 Hz, The solutions already found can be relatively rarely transferred to .other application examples, such as .B. simultaneous hardening of the. Bocks and the bearing seats on splines, for truck brakes.

4. Object of the invention

The invention is based on the objective, a method with: the. its necessary arrangements. develop, which unites the technological steps that have hitherto taken place sequentially in a technological process and thus: eliminates the technical-economic defect known from the state of the art.

5. 'Explanation of the essence of the invention. The invention is based on the object,., According to the. Objective a procedure with the implementation 45! necessary arrangements and facilities to develop, which ensures that components with. different hardened zones can simultaneously be heat treated to perform the curing process. The causes of the lack of known technical solutions are to be found in the fact that 50th can not be performed simultaneously with the previously known methods and their facilities a multiple heat treatment. This is justified by the difference; the procedural steps and the necessary facilities and arrangements that do not permit simultaneous actions on different and new types of hardness zones. The features of the invention are that - several different to. treatment sites of different shapes are brought simultaneously with inductive heating to hardening temperature, without individually or in total, to get local overheating, because the known total area heating method including. required compensation time institutionally and in terms of time to be heated or cured zones is modified; - all points to be heated at the same time only von.einer

frequency-transforming energy source are fed; - All heated according to the aforementioned process step hardening zones are quenched simultaneously with subsequent tempering.

The method according to the invention is thereby carried out several times and simultaneously, by arranging a combination of inductors and effervescent quenching devices on the device. to be hardened, ie that the process

15: steps now "harden" to be performed simultaneously. The arrangement required for carrying out the method, well-known device components, are as follows: a combination of several individual inductors is processed into a multiple-combiner inductor, with individual inductor regions occupied by concentrator plates for power concentrating. The inductor combination represents an electrical and cooling medium series connection. The quenching tank is a device adapted to the circumstances.

 The method with the corresponding arrangements ensures that a considerable reduction of the time expenditure occurs compared with the previously known process steps to be carried out one after the other In addition, there is the advantage that the apparatus-related outlay for process implementation, transformation and distribution of energy, control equipment and handling of the parts is considerably simplified while maintaining the quality parameters

6 ^; , Embodiment.

The invention is based on an embodiment.

35: closer, will be explained.

The accompanying drawing shows a workpiece 5 'with two in OiEer. Form strongly different hardness zones 1,2 and the associated water-cooled Teilinduktorspulen 3, -4 of the entire heater, which are electrically and in cooling medium connected in series.

Winding numbers 8, Y / indungsabstände 9, coupling distances 1.0, ladder hollow sections T.1., Current and heating time are at a given operating frequency: coordinated so that a

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simultaneous heating of the two hardness zones without quality

105; mitigating overheating is made possible.

If necessary, discrete :. Make concentrator plates 6 to increase the Induktorwirkungsgrades used, lach reaching the for. the different hardness zones 1: 2, 2 nd required temperature takes place; by means of suitable

1.TD neter. Arrangement 1 the immersion, in the hardening bath or quenching, by shower and discharging the workpiece ..

Claims (4)

- 5; ~ έ Claim . , T .. Method and arrangement for the simultaneous indulctive surface hardening of several strongly different hardness zones on the same workpiece without quality-reducing partial overheating. in that the essential steps of the method, such as simultaneous inductive heating of all hardening zones located at one or more preferably rotating bodies, have a very different shape, at hardening temperature, according to the total area heating method, including the compensation time required for the supply of the energy only one frequency converter takes place, with simultaneous quenching of all hardening zones being carried out, wherein the heating of the following workpiece is commenced at the beginning or during the quenching or after the heating. Hardening temperature, is made. 2. Method and Arrangement According to Item 1 g e k e η η ζ e i c. H. net in that an arrangement is used which consists essentially of a combination of inductors to a heater and a quenching '. 3. Method and Arrangement According to Item 1 g e k e η η - It is characterized by the fact that defined arrangement and process parameters relating to the hardness zones, such as number of turns, waveguide arrangement, waveguide profile, concentrator sheet stock, amperage, frequency and heating time are used. 4. Method and arrangement nach.Punkt 1 characterized in that the arrangement consists essentially of a waveguide arrangement analogous to an electrical and cooling media Seri.enschaltung of corresponding modified parts of the necessary for each hardening zones inducers: as a heater and one for the quenching of the cured Parts of suitable 'quenching supporters assigned, is. For this