JP6607706B2 - Processing method and apparatus - Google Patents

Description

  The present invention relates to a processing method and apparatus for processing and heat treating a material to obtain a long object.

  Long objects such as steel bars and steel wires are manufactured by performing heat treatment such as quenching and tempering in order to maintain strength and toughness after performing plastic working such as drawing.

  By the way, in the technique disclosed in Patent Document 1, when performing induction hardening, there is a possibility of generating sparks or the like if dust or chips generated in the previous process adhere to the work. The dust and chips are blown away. In the technique disclosed in Patent Document 2, in order to remove the scale attached to the coil, a cleaning nozzle is provided on the outer peripheral side of the coil, and water is jetted from the cleaning nozzle.

JP-A-6-128625 JP 2011-1580 A

  The long object described above is plastically processed by attaching a lubricant to the material, and then subjected to high-frequency heat treatment in a state where the lubricant is continuously attached to the material. Therefore, the life of the high frequency heating coil is shortened.

  Therefore, the present invention provides a processing method and apparatus capable of manufacturing a long object at low cost without causing any trouble to the manufacturing line even if the plastic processed material is continuously subjected to high-frequency heat treatment. The purpose is to provide.

The present invention takes the following means for achieving the object.
[1] A processing step of attaching a lubricant to a long material and processing the material,
A heat treatment step in which the inside of the insulating tube inserted through the spiral induction heating coil is set as a temperature rising gas atmosphere, and the material of the long material that has undergone the processing step is inserted into the insulating tube and induction heated,
Only including,
A processing method in which, in the heat treatment step, a gas heated by a heater is introduced into the insulating tube from an upstream side of the insulating tube .
[2] Processing means for attaching a lubricant to a long material and processing the material,
A heating means formed by inserting an insulating tube through a spiral induction heating coil;
With
A processing apparatus that heats the material of the long object processed by the processing means through the induction heating coil through the insulating tube in a temperature rising gas atmosphere ,
The processing device having a heater for raising the temperature of the gas in the heating means, and provided with a gas introduction means for introducing the gas heated by the heater into the insulation pipe from the upstream side of the insulation pipe .

  According to the present invention, a lubricant is attached to a long material and processed, and then continuously transferred into a heated gas atmosphere in an insulating tube inserted in a spiral induction heating coil. In addition, before and after induction heating, the lubricant adhered to the long material can be removed. Blowing the temperature rising gas to a long material makes it difficult for the lubricant or its deformation to adhere to the inner wall of the insulation tube, reducing the number of maintenance such as replacing the insulation tube, and hindering the production line. In addition, a long product can be manufactured at a low cost.

It is a figure which shows typically the processing apparatus which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram schematically showing a processing apparatus according to an embodiment of the present invention.

  As shown in FIG. 1, the processing apparatus 1 according to the embodiment of the present invention includes a processing unit 2 and a heating unit on a line on which a long material W is transferred by a plurality of sets of transport mechanisms (not shown). Means 3 are arranged in order from the upstream side to the downstream side.

  The processing means 2 attaches the lubricant to the material W and performs processing such as plastic processing. Examples of plastic working include drawing.

  The heating means 3 energizes and heats the material W that has undergone the processing step. In the form shown in FIG. 1, the heating means 3 includes a helical induction heating coil 3a, an insulating tube 3b inserted through the hollow of the induction heating coil 3a, and a gas introducing means 3c for making the inside of the insulating tube 3b a gas atmosphere. And have.

  The heating means 3 induction-heats the material W that is inserted into the hollow of the induction heating coil 3a and transferred. The length of the spiral induction heating coil 3a is selected so as to heat the material W to a predetermined temperature according to the thickness and length of the material W and the magnitude of the current supplied to the induction heating coil 3a. The insulating tube 3b is provided in order to prevent the occurrence of sparks between the material W and the induction heating coil 3a. The insulating tube 3b protrudes on both sides of the induction heating coil 3a, and the gas introducing means 3c is connected to the upstream side of the insulating tube 3b.

  The gas introduction means 3c includes a gas introduction pipe 3d and a heater 3e that heats the gas supplied to the gas introduction pipe 3d. The gas introduction pipe 3d is partially missing at its tip so as to contact and engage the upstream end of the insulation pipe 3b.

  According to the processing apparatus 1 which concerns on embodiment of this invention, the raw material W is sent out by a conveyance means, and plastic processing, such as drawing, is first performed to the raw material W by the processing means 2, for example. At that time, the processing means 2 attaches the lubricant to the surface of the material W and performs plastic processing. Therefore, the lubricant adheres to the surface of the material W transferred from the processing means 2 to the heating means 3.

  In the heating means 3, the insulating tube 3b has a gas atmosphere heated by the gas introduction means 3c, so that the lubricant adhering to the surface of the material W is burned before or during induction heating. For example, it is removed from the surface of the material W. Since the temperature raising gas is sequentially introduced by the gas introduction means 3c, when the induction heating coil 3a is induction-heated or in the middle thereof, the lubricant is removed from the material W or the lubricant reacts due to the temperature rise and partly It becomes a gaseous product and is discharged to the outside from the insulating tube 3b.

  Thus, since the temperature rising gas is blown obliquely to the material W on the upstream side in the insulating tube 3b, even if the lubricant is vaporized or vaporized as another product by the gas flow, the inside of the insulating tube 3b It becomes easy to discharge | release outside from the opening | mouth of an insulating tube before flying to a surrounding surface. Therefore, the lubricant or the product due to the heat thereof hardly adheres to the inner peripheral surface of the insulating tube 3b, and dirt such as the lubricant hardly deposits in the insulating tube.

  In this way, since dirt of the lubricant is difficult to be accumulated in the insulating pipe, a part of the heating means 3, for example, the gas introducing means 3c is removed from the insulating pipe 3b in the long production line and the insulating pipe 3b is The number of exchanges and the like is reduced, and the production efficiency can be improved.

  As the lubricant, for example, a powder lubricant, a wet wire drawing lubricant, and a drawing lubricant are used, and the lubricant contains various organic substances and surfactants. Therefore, it can be easily removed from the material W.

  As the gas, air, inert gas, or the like is used. By using the inert gas, the surface of the material W is hardly oxidized during induction heating. In addition, the manufacturing cost can be reduced by using air. Whether an inert gas or air is used is determined by the type and quality of the long object to be manufactured.

1: Processing device 2: Processing means 3: Heating means 3a: Induction heating coil 3b: Insulating tube 3c: Gas introduction means 3d: Gas introduction pipe 3e: Heater W: Long material

Claims (2)

A processing process that attaches a lubricant to a long material and processes it,
A heat treatment step in which the inside of the insulating tube inserted through the spiral induction heating coil is set as a temperature rising gas atmosphere, and the material of the long material that has undergone the processing step is inserted into the insulating tube and induction heated,
Only including,
A processing method in which, in the heat treatment step, a gas heated by a heater is introduced into the insulating tube from the upstream side of the insulating tube, and the raw material of the long object is gas blown in the transfer direction of the material . Processing means for attaching a lubricant to a long material and processing it;
A heating means formed by inserting an insulating tube through a spiral induction heating coil;
With
A processing apparatus that heats the material of the long object processed by the processing means through the induction heating coil through the insulating tube in a temperature rising gas atmosphere ,
The processing device having a heater for raising the temperature of the gas in the heating means, and provided with a gas introduction means for introducing the gas heated by the heater into the insulation pipe from the upstream side of the insulation pipe .

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