KR20140021938A - Continuous high frequency induction heating system of forging material - Google Patents

Abstract

The present invention relates to a continuous high frequency induction heating system of a forging material which is capable of improving productivity and work efficiency through automation of a process, reducing costs and a failure rate of a product, easily controlling a temperature, and reducing environmental contamination since a high frequency induction heating device continuously heats a forging material such as circle materials and square materials for a forging process while transferring the forging material to a conveyor belt. According to the present invention, a continuous high frequency induction heating system of a forging material comprises: a conveyor belt for loading and continuously transferring a forging material; and an induction heating device for heating the forging material due to electromagnetic induction in an upper part and a lower part of one side of the conveyor belt. [Reference numerals] (100) Central control device; (110) High frequency control box; (130) Conveyor control box; (150) Temperature sensing sensor; (160) Speed sensing sensor

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a continuous high frequency induction heating system of a forging material,

The present invention relates to a continuous high-frequency induction heating system for a forging material, and more particularly to a continuous high-frequency induction heating system for continuously heating a forged material such as a circular material and a square material for forging to a conveyor belt To a continuous high frequency induction heating system of a forged material.

In general, forging is a method of forming steel into a required shape by heating it to a certain temperature and then applying impact and pressure. It is used in various fields such as industrial conveying equipment, machinery, automobile, It is one of the processing methods used during plastic working that is commonly used for the production of basic parts.

Such forging is classified into hot forging, hot forging and cold forging according to the manufacturing method and equipment, and hot forging, which has improved fluidity of metal and excellent formability, is widely used.

Such forging processes use fossil fuels such as bunker seed oil and gas to heat the forged material in a heating furnace. In particular, low cost bunker seed oil is used as the main heating fuel. Then, the forged material heated by combustion such as bunker seed oil is transported to a forging machine by a hammer technician and is formed and processed.

1 is a photograph showing a heating method of a forging material using a conventional heating furnace.

Since the heating method of the forged material using the conventional heating furnace uses an oil fuel such as light oil as the fuel for heating, many pollution and harmful substances such as sulfur dioxide, carbon dioxide, carbon monoxide, soot and dust are discharged in the combustion process, There is a problem that the working environment is severely polluted and aggravated.

In particular, the poor working environment due to the pollution and the emission of harmful substances causes various respiratory diseases to the workers, thereby providing health adverse effects, and as a result, it acts as a main cause for avoiding the tasks related to forging, There is a problem that it is not properly performed.

In addition, the forging work in which the worker directly inputs the forged material into the heating furnace increases the hard physical labor to the worker, thereby preventing the task related to the forging work.

In order to solve such a problem, recently, a method of heating a forging material by using a high frequency induction current as shown in Fig. 2 has been disclosed. The method of heating a forged material using such a high frequency induction heating is not limited to the problems of burning diesel oil, that is, there is no discharge of pollutants, the flame is not emitted to the outside, and the workability is very efficient. The problem can be solved.

However, such a method of heating a forged material using the high-frequency induction heating can expect uniform induction heating only when a coil suitable for the size of the forged material to be charged is selected. When the coil is out of the suitable dimension range for the forged material, There is a problem that uniform heating can not be performed.

Therefore, conventional induction heating can not produce a variety of high-quality forged products having various sizes due to the specified specifications. For this reason, in most hot forging processes, there is a problem that the light oil heating method as shown in FIG.

In order to solve these problems, it is possible to purchase a dedicated high-frequency induction heating apparatus according to the size of the forged material separately. However, the development and purchase of such a high-frequency induction heating apparatus require a large purchase cost. In addition, Which is a problem of weakening profitability in terms of efficiency of use of heating equipment.

Therefore, it has been impossible to heat forged materials of various sizes with high quality due to the above-described problems in the conventional forging material heating apparatus, and the installation cost of the apparatus has been added to the production of a small quantity of various items. Particularly, in the domestic forging industry, where most of the small and medium-sized companies are located, despite the problems related to the use of fossil fuels such as light oil, There is a problem in that heating is inevitable.

Korean Patent Laid-Open No. 2009-0120996 (Published on November 25, 2009)

In order to solve the above problems, the present invention provides a continuous high-frequency induction heating system for a forging material which can continuously heat a forging material such as a circular material and a square material for an forging process by an automated system I have to.

Another object of the present invention is to provide a continuous high-frequency induction heating system for a forging material which can continuously heat a high-frequency induction heater while transferring a forging material to a conveyor belt.

Another object of the present invention is to provide a continuous high-frequency induction heating system of a forging material capable of continuously heating forging materials of various dimensions using a conveyor belt and a high frequency induction heater have.

Another object of the present invention is to provide a continuous high frequency induction heating system of a forged material which can easily control temperature, reduce environmental pollution, and reduce manufacturing cost by heating a forged material using a high frequency induction heater I have to propose.

Another object of the present invention is to provide a continuous high-frequency induction heating system for a forged material capable of improving work efficiency and production through automation of processes, and reducing defective rate and cost of products.

Another object of the present invention is to provide a continuous high-frequency induction heating system of a forging material for producing a variety of products capable of producing a high quality forging product by universally heating forging materials of various dimensions in a high frequency induction heater There is.

Another object of the present invention is to provide a continuous high-frequency induction heating system of a forging material for producing a variety of products capable of improving the productivity of a forged product by reducing the amount of physical labor and the creation of a comfortable working environment .

Another object of the present invention is to provide a continuous high-frequency material for a multi-variety forging material, which can produce high quality, high productivity, low cost forged products in individual induction furnace shapes by heating forged materials of various dimensions Induction heating system.

The solution to the problem of the present invention is not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

As a means for solving the above-mentioned technical problems, a continuous high frequency induction heating system for a forging material according to the present invention comprises: a conveyor belt for continuously conveying a forged material; And an induction heater for heating the forging material by a heater.

Wherein the conveyor belt includes a fixing member disposed on the conveyor belt in a longitudinal direction and fixed at predetermined intervals to fix the forging material, and the forging material is charged in one direction of the conveyor belt And a drawer for drawing the forging material in the other direction of the conveyor belt.

The continuous high frequency induction heating system of the forging material includes a high frequency control box for supplying high frequency current to the induction heater, a conveyor control box for controlling the operation of the conveyor belt, and a control device for controlling the temperature of the forged material heated by the induction heater A speed sensor for detecting the speed of the conveyor belt; and a controller for controlling the induction heater and the conveyor belt through the high frequency control box and the conveyor control box according to the detection signals of the temperature sensor and the speed sensor, And a central control unit for controlling the operation of the control unit.

The high frequency control box includes a converter for converting an AC power source to a DC power source and performing phase control, an inverter for amplifying and converting the DC power supplied from the converter to AC high frequency current, A control unit for controlling the inverter to generate a high frequency current by operating the inverter and a variable unit for changing the capacitance of the capacitor to stably supply the high frequency oscillated from the inverter to the induction heater.

According to the present invention, forging materials such as a circular material and a square material for forging are transferred to a conveyor belt and continuously heated by a high frequency induction heater, thereby improving work efficiency and production through automation of the process, The defect rate and the cost of the apparatus can be reduced, temperature control is easy, and environmental pollution can be reduced.

Also, by using a high frequency induction heater instead of a heavy oil furnace or gas, it is possible to reduce costs due to pollution prevention, quality control, and mass production in a forging factory.

In addition, it can be applied to a heating furnace, a melting furnace, a heat treatment furnace, and the like of a steel process which is a representative energy consuming process among industrial processes using a direct heating method through the combustion of fossil fuel.

In addition, it is possible to scale equipment designing and manufacturing technology to improve the hot forging work environment, and it is possible to improve forging productivity and produce uniform quality products.

In addition, by minimizing the repetitive labor, it is possible to improve the work environment and eliminate the risk of safety accidents.

In addition, it is possible to solve the occurrence of industrial accidents caused by repetitive and intensive manual work by avoiding job escaping factors by securing designing technology by induction heating of various kinds of hot forged materials.

In addition, it is expected that domestic forging companies will secure competitiveness by supplying small-sized forging materials as a domestic hot forging company.

In addition, there is an effect of increasing the productivity and improving the quality by improving the working environment.

In addition, there is a significant cost saving effect due to the reduction of energy consumption.

In addition, as the cost is greatly reduced and the quality is improved, the competitiveness of the forged parts can be strengthened, and the market for the hot forged parts market is expanded and the sales and net profit are increased.

In addition, by solving the problems in the field of job avoidance, it is possible to reduce the turnover phenomenon of the company employees and to set up conditions for inputting highly skilled human resources, and to contribute to prevention of safety accidents and enhancement of emotions .

In addition, it can increase the sales of related products by improving the competitiveness of sales due to the increase in production as well as the labor shortage.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a photograph showing a heating method of a forged material using a conventional heating furnace
2 is a photograph showing a heating method of a forging material using a conventional high frequency induction current
3 is a schematic diagram of a continuous high-frequency induction heating system for a forged material according to a preferred embodiment of the present invention
4 is a plan view of the conveyor belt according to the first embodiment.
5 is a side view of the conveyor belt and the induction heater according to the first embodiment
6 is a plan view of the conveyor belt according to the second embodiment.
7 is a side view of the conveyor belt and the induction heater according to the second embodiment
8 is a front view of the conveyor belt

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly explain the present invention in the drawings, parts not related to the description are omitted, and similar parts are denoted by similar reference numerals throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Example

3 is a configuration diagram of a continuous high-frequency induction heating system for a forging material according to a preferred embodiment of the present invention. Fig. 4 is a plan view of the conveyor belt according to the first embodiment, and Fig. 5 is a side view of the conveyor belt and the induction heater according to the first embodiment when viewed from the side. FIG. 6 is a plan view of the conveyor belt according to the second embodiment, and FIG. 7 is a side view of the conveyor belt and the induction heater according to the second embodiment. 8 is a front view of the conveyor belt.

3, a continuous high frequency induction heating system for a forged material according to a preferred embodiment of the present invention includes a central control device 100, a high frequency control box 110, an induction heater 120, a conveyor control box 130 A conveyor belt 140, a temperature sensing sensor 150, a speed sensing sensor 160, a charging unit 170, and a discharging unit 180.

First, the central control unit 100 controls the temperature of the forging material 10 sensed through the temperature sensor 150 and the rotation speed of the conveyor belt 140 sensed through the speed sensing sensor 160 And controls the operation of the induction heater 120 and the conveyor belt 140 through the high frequency control box 110 and the conveyor control box 130 according to the control signal.

The high frequency control box 110 serves to supply a high frequency current to the induction heater 120 under the control of the central control device 100. The high frequency control box 110 may include a converter, an inverter, a control unit, and a variable unit.

In this case, the converter supplies a three-phase alternating-current power of 60 Hz to a direct-current power supply, and supplies the three-phase alternating-current power to the DC power supply. The converter includes a filter to attenuate a ripple .

The inverter supplies the supplied power by amplifying and supplying a frequency of 900 to 1300 Hz at about 400 to 550 Hz, and a high-speed silicon controlled rectifier can be used for generating a high frequency. And a chopper method can be applied to ensure sufficient T.O.T (turn-off-time) due to the switching of the silicon controlled rectifier.

The controller may set a frequency band of the inverter by designating a selected frequency according to a size change of the forging material. For example, when the diameter (ø) of the forged material 10 to be charged is 130 to 200 mm, it is set to 500 Hz. When the diameter (ø) of the forged material 10 is 70 to 130 mm, Can be set. Therefore, a high-frequency current suitable for the size of the forging material 10 is oscillated, so that high-efficiency heating is achieved.

The variable unit serves to stably supply the high frequency current applied from the inverter to the induction heater 120. For this purpose, it can be composed of a capacitor and a switch. Therefore, the high-frequency current applied through the inverter is applied to the induction heater 120 through the condenser.

3, 5 and 7, the induction heater 120 is installed on the upper and lower sides of the conveyor belt 140, and the induction heating apparatus 120 induces the forging material 10 . In the induction heater 120, a heating coil, which is an induction coil, is installed.

The conveyor control box 130 controls the operation of the conveyor belt 140 under the control of the central control unit 100.

The conveyor belt 140 continuously feeds the forging material 10 from the loading part 170 and continuously heats the forging material 10 through the induction heating device 120. The conveying belt 140 is heated by the drawing part 180 To draw out the forged material 10 which has been heated by the heating means.

8, the conveyor belt 140 is installed to rotate between the two rotary members 143, and a plurality of idlers 144 may be installed inside the conveyor belt 140 . At this time, the width of the conveyor belt 140 is preferably smaller than the length of the forging material 10.

On the conveyor belt 140, a fixing member 141 is uniformly arranged in the longitudinal direction. The fixing member 141 may be installed at a predetermined interval to fix the forging material 10. The seating surface 142 between the fixing members 141 may be flat or have a concave curved surface facing the outer peripheral surface of the forging material 10. [

4 and 5, the fixing member 141 may be installed parallel to the conveyor belt 140 at a predetermined interval to fix the forging material 10 in a direction perpendicular to the longitudinal direction of the conveyor belt 140 have.

6 and 7, the fixing member 141 may be uniformly arranged in the longitudinal direction of the conveyor belt 140, and four fixing members 141 may be disposed on one of the forging materials 10 ) Are fixed.

The fixing member 141 may protrude from the conveyor belt 140 and may have various shapes for fixing the forging material 10.

The conveyor belt 140 can be continuously conveyed by fixing the forging material 10 mounted on the loading portion 170 with the fixing member 141 while rotating the conveyor belt 140 according to the above- The heated forging material 10 can be drawn out to the drawing unit 180 by rotation through the opening 120.

The temperature sensing sensor 150 detects the temperature of the forged material 10 heated by the induction heater 120 and transmits the detected temperature to the central control device 100. The speed sensing sensor 160 senses the speed of the conveyor belt 140 and transmits the sensed speed to the central control unit 100. At this time, the central control device 100 controls the induction heater 120 (not shown) through the high frequency control box 110 and the conveyor control box 130 according to the sensing signals of the temperature sensing sensor 150 and the speed sensing sensor 160, And the operation of the conveyor belt 140 are controlled.

Meanwhile, in the system of the present invention, the temperature sensing sensor 150 and the speed sensing sensor 160 may be omitted. At this time, the central control device 100 controls the operation of the induction heater 120 and the conveyor belt 140 through the high frequency control box 110 and the conveyor control box 130 according to a value set by an operator can do.

Industrial Applicability As described above, the heating of continuous heating by a high-frequency induction heater while transferring the forged material to a conveyor belt improves work efficiency and production through automation of the process, reduces defective products and costs, , Temperature control is easy and environmental pollution can be reduced.

Therefore, the continuous high-frequency induction heating system of a forged material according to the present invention continuously heats a forged material such as a circular material and a square material for a forging process to a conveyor belt and continuously heating the same with a high frequency induction heater, The technical problem can be solved.

It will be apparent to those skilled in the art that various modifications and changes can be made in the present invention without departing from the spirit or scope of the present invention as defined by the appended claims. It will be appreciated that such modifications and variations are intended to fall within the scope of the following claims.

10: Forging material 11: Heating part
100: central control device 110: high frequency control box
120: induction heater 130: conveyor control box
140: conveyor belt 141: fixing member
142: seat surface 143: rotating member
144: idler 150: temperature sensor
160: Speed sensing sensor 170:
180:

Claims (4)

A conveyor belt for continuously conveying with a forged material; And
An induction heater for heating the forging material by electromagnetic induction in one side upper and lower sides of the conveyor belt;
Wherein the forging material is a continuous high frequency induction heating system.
The method according to claim 1,
The conveyor belt
And a fixing member disposed on the conveyor belt at regular intervals in the longitudinal direction and spaced apart at predetermined intervals for fixing the forging material,
A charging part for charging the forging material in one direction of the conveyor belt; And
A draw-out portion for drawing the forging material in the other direction of the conveyor belt;
Further comprising the step of:
The method according to claim 1,
In the continuous high-frequency induction heating system of the forging material,
A high frequency control box for supplying a high frequency current to the induction heater;
A conveyor control box for controlling the operation of the conveyor belt;
A temperature sensor for detecting the temperature of the forged material heated by the induction heater;
A speed sensing sensor for sensing the speed of the conveyor belt; And
A central control device for controlling the operation of the induction heater and the conveyor belt through the high frequency control box and the conveyor control box according to the detection signals of the temperature sensor and the speed sensor;
Further comprising the step of:
The method of claim 3,
The high-
A converter for converting AC power into DC power and phase-controlling the AC power;
An inverter for amplifying and converting the DC power applied from the converter to an AC high frequency current;
A control unit for controlling the inverter to generate a high frequency current by operating a frequency selection switch according to the diameter of the forging material; And
A variable device for changing the capacity of the condenser so as to stably supply the high frequency wave oscillated from the inverter to the induction heater;
Wherein the forging material is a continuous high frequency induction heating system.

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