KR102014911B1 - Heating device for electrical conductive plate - Google Patents

Abstract

The present invention provides a heating device for an electro-conducting plate, capable of accurately compensating for a deflection rate of a plate in accordance with situation in a field such as a condition and an environment heating an electro-conducting plate. According to the present invention, the heating device for an electro-conducting plate includes: left and right electrode clamps individually installed on the left and the right of the upper part of a frame and holding both ends of the electro-conducting plate; a power device supplying an electric current to the plate by being connected to the electrode clamp on the left and the right; a rail extended from the upper part of the frame in the horizontal direction; a moving block moving along the rail by being connected to the electrode clamp on the right; a moving actuator moving and driving the moving block in the horizontal direction; a light radiation device radiating light to a side of the plate for a light point to be generated on the side of the plate while the plate is in a tension state within a predetermined range; and a light point detecting device detecting whether the light point is generated on the side of the plate.

Description

Heating device for electrically conductive plate {HEATING DEVICE FOR ELECTRICAL CONDUCTIVE PLATE}

The present invention relates to a heating apparatus for an electrically conductive plate, wherein the left and right electrode clamps on the frame apply current to the plate while holding the electrically conductive plate, so that the plate can be supplied in a heated state before forming the plate. The present invention relates to a heating apparatus for an electrically conductive plate.

When manufacturing the parts of the automobile body, the process is carried out by inserting a plate of steel material into a mold and rapidly cooling it at the same time as a molding by pressing.

For the progress of this process, the steel sheet has a complex shape and is preheated to a high temperature of a soft and high ductility state so as to be processed with excellent dimensional accuracy.

The plate | board material thrown into a press die is heated by the electrical current system normally.

FIG. 1 shows a heating apparatus for heating a plate by such an electric conduction method as described in Korean Patent Publication No. 10-1871429.

Referring to FIG. 1, the first clamp 2 supports a part of the plate 1, and the second clamp 3 is installed to support the other part of the plate 1, and the pressing part 8. It is operated by and can bite and support the board | plate material 1.

Since the plate 1 may be made of an electrically conductive plate such as steel, aluminum, magnesium, copper, and the like, the plate may be electrically heated, and thus, the electric supply unit 4 may be connected to the first clamp 2 and the second clamp 3 to provide a potential difference. When generated, a current can flow and be heated by heat of electrical resistance.

When the current flows to the plate 1 and is heated, the plate 1 is stretched and sag due to thermal expansion, so that the moving device 5 moves the first clamp 2 or the second clamp 3 to the outside to allow the plate to be moved outward. By straining 1), deflection due to thermal expansion amount can be compensated.

The controller 6 has expansion information calculated based on the shape, thickness, material, heating time, thermal expansion coefficient, and the like of the plate 1, and applies a control signal to the moving device 5 according to the information.

When the plate 1 is heated, the moving device 5 moves in the longitudinal direction of the plate 1, and after the plate 1 is formed through the press 7 and then removed, the moving device 5 is controlled. A return signal can be received from (6) to move to the reference position.

However, in the above-described conventional heating device, since the moving amount of the moving device 5 is set in advance according to the expansion amount information of the plate stored in the control unit 6, the amount of deflection of the plate according to the situation of the site, such as the environment and conditions, is accurately determined. There is a problem that cannot be compensated.

In addition, when the moving device 5 excessively moves the first clamp 2 or the second clamp 3 in the state where the sheet 1 is heated to a high temperature, an excessive tensile force acts on the sheet 1. As (1) is elongated, a change in length may occur, which causes a problem that affects the quality of a molded product to be manufactured.

The present invention is derived from the above point, the object of the present invention is to provide an apparatus for heating a conductive plate that can accurately compensate for the amount of deflection of the plate according to the situation of the site, such as the environment and conditions for heating the conductive plate. will be.

In addition, another object of the present invention, in compensating the deflection by the clamp pulled the heated electrically conductive plate can be blocked or minimized the risk that the length and thickness change may occur in the plate at high temperature due to excessive tensile force It is to provide a heating device for an electrically conductive plate.

In order to achieve the above object, a heating apparatus for an electroconductive plate according to the present invention includes a frame, electrode clamps on the left and right sides which are respectively installed on the left and right sides of an upper portion of the frame and grip both ends of the electrically conductive plate, and the left side. And a power supply unit connected to the electrode clamp on the right side to supply current to the plate, a rail installed to extend in the left and right directions from the upper portion of the frame, and a moving block coupled to the electrode clamp on the right side to move on the rail. And an allowable range in which the plate is deformed in the up and down direction when the plate is heated by a current, between the move driver for moving the moving block in the left and right direction and between the left and right electrode clamps. With a light irradiator for irradiating light toward the side of the plate from the side of the plate so that can be set And, by detecting whether a light point occurs on the side of the plate, characterized in that it comprises an optical point detector for checking whether the plate is out of the allowable range.

In addition, the heating device of the electroconductive plate according to the present invention, when it is determined that the plate is out of the allowable range by receiving a signal from the optical point detector, by controlling the moving driver the electrode clamps of the left and right Further characterized in that it further comprises a controller for controlling the moving block to move in a direction away from each other.

In addition, the heating device of the electrically conductive plate according to the present invention, a temperature sensor for measuring the temperature of the plate (P) and transmits to the controller is further installed, the controller is controlled to move the moving block 43 At the time, when the temperature of the heated plate (P) is low, the moving speed of the moving block 43 is lowered, and when the temperature is high, the moving speed is characterized by controlling to increase the moving speed.

In addition, the heating device of the electrically conductive plate according to the present invention, the electrode clamp is a support member having a lower clamping pad attached to the upper surface of the front end, an electrode member electrically connected to the lower clamping pad, the rear side of the lower clamping pad A hinge shaft installed on the support member, a clamping member having an upper portion of the hinge member coupled to the hinge shaft and having an upper clamping pad attached to a lower surface of the front end, and installed at a rear side of the support member. And a gripping driver configured to pivot the clamping member by pivoting the rear end of the clamping member about the hinge axis so that the upper clamping pad and the lower clamping pad cooperate to grasp or release the plate material. The support member is installed by the pivot axis parallel to the hinge axis When the upper and lower rear end of the ramp member is driven, and that the axis pivotable above the pivot in the forward and backward directions as a further feature.

In addition, the heating device of the electroconductive plate according to the present invention, which is coupled to the frame, a plate floating machine for injecting air upwards toward the plate from the bottom of the plate is installed, the optical point does not occur In this case, under the control of the controller, the plate floating part is sprayed with a predetermined flow rate of air toward the plate, so that the plate is subjected to a lift force floating at a predetermined height.

In addition, the heating apparatus of the electrically conductive plate according to the present invention, the plate floating part includes a heater for heating the air to be injected, and a temperature sensor for sensing the temperature of the plate, the controller is based on the detected value of the temperature sensor Proportionally controls the heating temperature to be heated by the heater, the plate floating part is directed toward the upper side to inject the air of the lower surface of the plate, and air flowing outward after hitting the lower surface of the plate from the outside of the injection hole And an intake port for sucking the air and circulating the sucked air so that the heater is heated and re-injected into the injection hole.

The electrically conductive plate heating apparatus according to the present invention includes a moving block coupled to an electrode clamp on the right side, a moving driver for moving the moving block, and irradiating light to the side of the plate so that an optical point is generated on the side of the plate. It includes a light irradiator and an optical point detector for detecting whether an optical point occurs.

Accordingly, when the optical point does not occur, the electrode clamp on the right side is driven to pull the plate and stops the movement of the electrode clamp on the right side when the optical point occurs. It is possible to keep the plate in a taut horizontal state by accurately compensating the amount of deflection of the plate according to the situation of the site, such as the environment and condition of heating.

In addition, the heating device of the electrically conductive plate according to another configuration of the present invention, the plate floating portion is installed on the lower side of the plate to assist the deflection of the plate to be compensated. Accordingly, it is possible to smoothly maintain the horizontal state of the plate while reducing the tensile force that the electrode clamp pulls the plate without needing to add excessive tension to the heated electrically conductive plate.

1 is a configuration explanatory diagram of a heating apparatus for heating a plate in a conventional electric current supply method
2 is a perspective configuration diagram showing a configuration of a heating apparatus of an electrically conductive plate according to an embodiment of the present invention.
Figure 3 is a side configuration diagram showing the side configuration of the heating device of the electrically conductive plate according to the embodiment of the present invention.
4 is a planar configuration diagram showing a planar configuration of a heating apparatus for an electroconductive plate according to an embodiment of the present invention.
Figure 5 is a perspective configuration showing the configuration of the electrode clamp in the heating device of the electrically conductive plate according to the embodiment of the present invention
6 is an operation explanatory diagram illustrating the operation of the electrode clamp in the heating device of the electrically conductive plate according to the embodiment of the present invention.
7 and 8 is an operation explanatory diagram illustrating the operation according to the presence or absence of the optical point in the heating apparatus of the electrically conductive plate according to the embodiment of the present invention
9 is an explanatory view illustrating a configuration and operation of setting an allowable range by irradiating light points on the upper side and the lower side in the heating apparatus of the conductive plate according to the embodiment of the present invention.
10 is a configuration explanatory diagram illustrating a configuration in which a plate floater is installed in a heating device of an electrically conductive plate according to another embodiment of the present invention.
11 is a planar configuration diagram showing a planar configuration of a heating apparatus for an electrically conductive plate according to FIG. 10.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

An apparatus for heating an electroconductive plate according to an embodiment of the present invention is an apparatus for conducting and heating an electrically conductive plate (P) such as a steel sheet or an aluminum plate before molding.

At this time, the heated plate (P) is formed in the state of being bitten by the heating apparatus of the present embodiment or is moved to the molding die by a robot is pressed.

For this reason, by heating the plate P together, the plate P does not sag and is in a tensioned state due to tension generation, so that the molding can be smoothly and precisely formed when the mold is formed in that state, and the robot can use the plate ( Even when P) is moved to the mold, the robot can grasp the plate P accurately, and the problem that the plate P is distorted due to thermal deformation can be solved.

2 to 4, the heating device of the conductive plate according to the embodiment of the present invention, the frame 10 and the upper and left sides of the upper portion of the frame 10, respectively, are installed at both ends of the plate (P) Left and right electrode clamps 20 and 30 to be gripped, a power supply unit (not shown) connected to the left and right electrode clamps 20 and 30 to supply a current to the plate material P, and the frame ( The rail 41 is installed to extend in the left and right directions from the top of the 10, the moving block 43 is coupled to the electrode clamp 30 of the right side and moves on the rail 41, and the moving block 43 Is installed on the frame 10 between the movable driver 45 for driving the shaft in the left and right directions and the electrode clamps 20 and 30 on the left and right sides. The side of the board | plate material P from the side of the said board | plate material P so that the permissible range which P) is deformed to an up-down direction can be set The light irradiator 51 for irradiating light toward the light and the light point 55 is detected on the side surface of the plate (P) to detect whether the plate (P) is out of the allowable range for And an optical point detector 53.

The frame 10 forms a body to support each part, and an electrode clamp, a rail 41, a moving driver 45, and the like are installed at an upper portion thereof.

The lower part of the frame 10 is provided with a plurality of casters 13 are movable.

The electrode clamps 20 and 30 are respectively provided on the left and right sides of the upper portion of the frame 10 to grip both ends of the plate material P, and to energize the plate material P so that the plate material P is heated by the heat of resistance.

The left and right electrode clamps 20 and 30 are disposed to face each other, the left electrode clamp 20 is directly fixed to the upper portion of the frame 10, the right electrode clamp 30 is a moving block ( 43 and the rails 41 are installed on the upper portion of the frame 10.

5 and 6, the electrode clamps 20 and 30 are electrically connected to the support member 31 having the lower clamping pad 31a attached to the upper surface of the front end and the lower clamping pad 31a, respectively. Connected electrode member 32, the hinge shaft 33 is installed on the support member 31 at the rear side of the lower clamping pad 31a, and the intermediate portion is located on the upper side of the support member 31 hinge shaft 33 And a clamping member 34 having an upper clamping pad 34a attached to a lower surface of the front end, and installed at a rear side of the support member 31 to drive the rear end of the clamping member 34 up and down. ) Pivots around the hinge axis 33 to include a grip driver 36 to allow the upper clamping pad 34a and the lower clamping pad 31a to cooperate to bite or release the plate P.

The support member 31 is a part forming the bodies of the electrode clamps 20 and 30. In the electrode clamp 20 on the left side, the support member 31 is directly installed on the frame 10 and the position is fixed. In the electrode clamp 30 of the support member 31 is coupled to the moving block 43 to allow the electrode clamp 30 on the right side with the moving block 43 to move.

The support member 31 includes a horizontal plate 31b and a vertical plate 31c, and a lower clamping pad 31a is installed on the horizontal plate 31b.

The lower clamping pad 31a is attached to the support member 31 via the electrode member 32 by stacking the electrode members 32 between the horizontal plates 31b and by contacting the electrode members 32. It can be made to energize the plate (P) holding.

A pivot shaft 36c positioned behind the vertical plate 31c is installed, and the grip driver 36 is coupled to and supported by the pivot shaft 36c.

The support member 31 is provided with a hinge shaft 33 on the rear side of the lower clamping pad 31a, whereby the clamping member 34 is axially coupled to the hinge shaft 33.

The clamping member 34 is located on the upper side of the support member 31, the middle portion is axially coupled with the hinge shaft 33, and the upper clamping pad 34a is attached to the lower surface of the front end.

The upper clamping pad 34a may approach the lower clamping pad 31a to bite the plate P therebetween when the plate P is bitten.

At the rear end of the clamping member 34, the cylinder rod 36a of the gripping driver 36 is pin-coupled 36b, and when the gripping driver 36 stretches the cylinder rod 36a, the clamping member 34 is hinged. The plate material P may be bitten or released between the upper clamping pad 34a and the lower clamping pad 31a by turning about the center.

When the cylinder rod 36a of the gripper 36 contracts and releases the bite on the plate P, the gripper 36 is coupled to the pivot 36c and slightly inclined about the pivot 36c. Therefore, the cylinder rod 36a can smoothly generate the action of pulling the clamping member 34 about the hinge shaft 33.

That is, the grip driver 36 is installed on the support member 31 by the pivot shaft 36c parallel to the hinge shaft 33, so that when the rear end of the clamping member 34 is vertically driven, the grip driver 36 is hinged. It can turn in the front-rear direction about (33).

The power supply device is to generate heat by supplying a current to the plate (P), the positive electrode is connected to the electrode clamps (20, 30) of the left and right to supply the current to the plate (P).

In the left and right electrode clamps 20 and 30, a power supply device is connected to the electrode member 32, respectively, and a current is supplied to the plate P through the lower clamping pad 31a that is energized with the electrode member 32. do.

On the other hand, referring to Figures 2 to 4, the rail 41 is installed so as to extend in the left and right direction from the top of the frame 10, guides the moving block 43 to be engaged.

The rails 41 are installed in the left and right directions on the upper surface of the frame 10 and are installed in pairs in parallel with each other along both edges of the upper surface of the frame 10.

The moving block 43 is coupled to the rail 41 to move on the rail 41.

The moving block 43 is installed in a direction of connecting the pair of rails 41 so that both ends thereof hold the pair of rails 41, respectively, and the electrode clamps on the right side of the moving block 43 30) is installed.

The moving block 43 may be moved on the rail 41 in the left and right directions by the moving driver 45.

The moving driver 45 is ball screw 45b ball-coupled to the moving block 43 and installed in parallel with the rail 41, and an electric motor fixed to the frame 10 to rotate the ball screw 45b. 45a).

As the ball screw 45b rotates by the rotation of the electric motor 45a, the moving block 43 may generate a driving force that moves in the left and right directions on the rail 41.

On the other hand, the light irradiator 51 is for checking whether the deformation of the plate (P), such as sag due to the thermal deformation occurred by irradiating light to the side of the plate (P).

The light irradiator 51 is installed on the frame 10 together with the optical point detector 53 by the mounting table 54 between the left and right electrode clamps 20 and 30, and the plate P is disposed on the left and right electrodes. The light is irradiated toward the side surface of the plate P horizontally at the same position as the height position of the clamped 20 and 30 to form a tensioned horizontal state.

When the light irradiator 51 irradiates the light toward the side of the plate P, the light strikes the side of the plate P in the tension state of the plate P, so that the light point 55 is placed on the side of the plate P. Occurs.

If a deformation exceeding an allowable range in which the plate material P sags downward or rises upward due to thermal deformation occurs, the light of the light irradiator 51 irradiated at a predetermined position may meet the side surface of the plate material P. Therefore, the light point 55 cannot occur on the side of the plate material P.

The light irradiated from the light irradiator 51 may meet at least part of the plate P until it completely escapes the light, so that the light point 55 may be generated on the side of the plate P. Thus, the plate P may be set by setting the size of the light. An allowable range that can be deformed up and down can be set. Of course, the height position of the light and the thickness of the plate P also influence the above acceptable range.

The light irradiator 51 of the present embodiment is most preferably irradiated with a laser having high straightness and high concentration, and the irradiated laser has a height interval h1 of the light area in the vertical direction greater than the thickness t of the plate P. By doing so, even if there is a position change in the allowable range of the plate member P in the vertical direction, the optical point 55 is generated.

Since the deflection occurs due to the heat deformation of the plate P and the plate P is pulled again, it is not possible to become a completely horizontal plane due to its own weight. Therefore, it is preferable to have an allowable range in the vertical direction. The area of light irradiated so that the light point 55 is generated on the side of the plate P has a height interval h1 larger than the thickness t of the plate P.

The light point 55 refers to an image in which light such as a laser hits the side surface of the plate P and is formed by a camera or the like.

The optical point detector 53 means an image acquisition means such as an image camera, and is installed on the frame 10 by the mounting table 54 together with the light irradiator 51.

Since the optical point 55 in the image signal acquired by the optical point detector 53 has a difference in the brightness (brightness) of the peripheral part and the pixel, the image obtained by the optical point detector 53 is transmitted to the controller to transmit the optical point ( 55) The controller analyzes and confirms whether there is any.

7 and 8 illustrate the action of tensioning the plate P in accordance with the occurrence of the light point 55 in the heating device of the electrically conductive plate according to the embodiment of the present invention.

Referring to FIG. 7, when both ends of the plate P are gripped in a horizontal state in which both ends of the plate P are gripped by the left and right electrode clamps 20 and 30, the light irradiator 51 irradiates from the side of the plate P. Light to hit the side of the plate (P) to generate a light point 55.

The image information is acquired by the optical point sensor 53 and transferred to the controller, and the controller maintains the position of the electrode clamp 30 on the right side by checking whether the optical point 55 is generated.

When a current is applied to the plate P and generates heat, even if there is a slight deflection in the plate P due to thermal deformation, the area of the irradiated light has a height interval h1 larger than the thickness t of the plate P, The optical point 55 may be generated because it has a margin in the vertical direction at the position of the plate member P in the taut state.

FIG. 8A illustrates a case where the deflection of the plate P occurs due to thermal deformation when a current is applied to the plate P to generate heat, and the deflection exceeds the allowable range on the side of the plate P. FIG. The case where the optical point 55 does not generate | occur | produce is shown.

In this case, the controller receives the video signal from the optical point sensor 53 and can confirm that there is no optical point 55. Therefore, the controller controls the mobile driver 45 to control the left and right electrode clamps 20 and 30. Moves the moving block 43 in a direction away from each other.

That is, the controller controls the electric motor 45a to rotate the ball screw 45b to move the moving block 43 and the electrode clamp 30 on the right side in the right direction, thereby tensioning the plate P.

Accordingly, the light point 55 is generated on the side surface of the plate P while the plate P is in a tension state again as shown in FIG. 8B, and image information is acquired by the light point detector 53. And the controller is transferred to the controller, and the controller checks the state in which the optical point 55 is generated in real time, thereby immediately stopping the movement of the electrode clamp 30 on the right side and maintaining the stopped position.

Accordingly, the plate P heated by the electrical resistance is maintained in a tightly tensioned state, and press processing is performed in that state, or the robot can grasp the plate P in a horizontal state accurately and insert it into a mold.

On the other hand, in the action of moving the moving block 43 and the right electrode clamp 30 to the right direction by controlling the electric motor 45a to rotate the ball screw 45b, the controller is controlled to the temperature of the plate (P) Depending on the movement speed can be controlled.

To this end, it is necessary to install a temperature sensor for non-contact measurement of the temperature of the plate (P), the motor 45a may be a servo motor or the like capable of speed control.

Specifically, the moving speed for each temperature is preferably controlled at 1500 mm / min at a temperature of 400 to 600 ° C., at 1700 mm / min at 600 to 800 ° C., and at 2000 mm / min at 800 to 950 ° C. for a steel sheet. .

As described above, controlling the moving speed of the electrode clamp 30 on the right side by the temperature of the plate (P), since the amount of deformation increases in proportion to the temperature rise, the higher the temperature increases the moving speed, the plate (P) torsionally deformed This is to compensate for deformation such as sag quickly and maintain a flat plate state before.

The reason why the moving speed is not high in the low temperature range is that the deformation amount is not relatively large, so that the rapid deformation can be compensated even at a low speed, and the plate material P is removed from the electrode clamps 20 and 30.

That is, even if the moving block 43 is stopped immediately due to the occurrence of the above-described optical point 55 when the moving block 43 is moved by the controller, the precise position control is not achieved due to the inertia, and the plate P instantaneously at the time of stopping. There is a problem that is slightly pulled.

At this time, if the plate P is in a high temperature state, the elongation is also increased with the temperature, so the plate P can absorb the pulling tension, but when the plate P is relatively low, the elongation is not high. The instantaneous tensile force that pulls the plate (P) at the stop of the moving block 43 is not absorbed by the plate (P) and the plate (P) in the electrode clamps (20,30) may be pulled out or slightly out of the bite state may be poor. have.

Therefore, the control is performed to lower the moving speed of the moving block 43 in the low temperature range of the heated plate P and to increase the moving speed in the high temperature range.

On the other hand, Figure 9 is configured to irradiate the light irradiated from the light irradiator 51 divided into the upper side light 57 and the lower side light 58 in order to set the allowable range that can sag during the heat deformation of the plate (P) It is shown.

When the deflection of the plate material P occurs and contacts the upper side light 57 or the lower side light 58, the optical point 55 is generated on the side surface of the plate material P, and the image information is detected by the optical point detector 53. Is obtained and passed to the controller.

In the present configuration, unlike the above-described configuration, when the light point 55 is generated on the side surface of the plate P by the upper side light 57 or the lower side light 58, the plate P is determined to be out of the allowable range. Will be.

Therefore, in this configuration, the height interval h2 between the upper side light 57 and the lower side light 58 becomes an allowable range in which the plate material P can be deformed in the up and down direction when heat is generated.

The following describes a heating apparatus of an electrically conductive plate according to another embodiment of the present invention.

10 and 11, the heating apparatus of the present embodiment, which is coupled to the frame 10, has a plate oiler 70 for injecting air upward from the lower side of the plate P toward the plate P. ) Is installed.

The plate floating unit 70 flows outward after hitting the upper surface of the plate material P so as to inject air to the lower surface of the plate material P and the lower surface of the plate material P outside the injection port 71. It comprises a suction port 72 for sucking the air to the air, and a heater 74 for heating the injected air, and a temperature sensor 76 for sensing the temperature of the plate (P).

The injection port 71 injects air upward so that the air injected from the center of the plate P floats the plate P, and floats the plate P on the lower surface of the plate P, and then flows. One air is re-absorbed into the inlet 72 to allow circulation of the air.

The air in the atmosphere and the air sucked into the suction port 72 by the suction pump 73 in the plate floater 70 are supplied to the injection port 71 together, and the air supplied to the injection port 71 is a heater 74. It is heated by) and discharged from the injection port 71.

The plate floater 70 has some supporting force to prevent excessive deflection of the plate P due to heat deformation by allowing the air injected upward to float the plate P and to maintain the plate P in a tense horizontal state. Providing.

When deflection occurs due to heat deformation due to heat generation of the plate P, in order to move the electrode clamp 30 on the right side to tighten the plate P tightly, the electrode clamp 30 on the right side has a sufficient tension force. Need to pull

However, when the electrode clamp 30 on the right side adds excessive tensile force to the plate P, the heated plate P may be stretched by the tensile force to cause a length change, and thus the electrode clamp 30 on the right side. It is necessary to maintain the horizontal state of the plate (P) while reducing the tensile force pulling the plate (P).

The plate floater 70 floats the plate P deflected with a predetermined lifting force by air to maintain a taut horizontal state in the state where the plate P sag even if the electrode clamp 30 on the right side adds a small tensile force. To help you.

The plate floater 70 is provided with a heater 74 for heating air and a temperature sensor 76 for sensing the temperature of the plate P, and the temperature sensor 76 is one side of the upper surface of the frame 10. It is installed on the non-contact to measure the temperature of the plate (P).

The controller receives the detection value of the temperature sensor 76 and controls the heating temperature that the heater 74 heats in proportion to the detection value.

Accordingly, the air injected upward from the injection port 71 is heated to a high temperature by the heater 74 to contact the lower surface of the plate (P) to minimize the problem that the heated plate (P) is cooled by the air.

In the case where the above-described light point 55 does not occur, the plate floater 70 injects air to the plate P under the control of the controller, and the injected air is sucked back into the suction port 72 and circulated. .

The suction port 72 is provided on both sides in the width direction of the plate P to suck air, and the temperature rise of the air by the heater 74 is facilitated by partially recycling the heated air.

The suction hole 72a of the suction port 72 is opened upwardly and inclinedly opened toward the injection port 71 so that the air flowing outward from the injection port 71 along the lower side of the plate P can be smoothly sucked in. have.

Although the preferred embodiment of the present invention has been described above, the above embodiment is merely an embodiment within the scope of the technical idea of the present invention, and in the ordinary skill in the art, within the technical idea of the present invention. Of course, other variations are possible.

10; Frame 13; Caster
20; An electrode clamp 30 on the left side; Right electrode clamp
31; Support member 31a; Lower clamping pad
31b; Horizontal plate 31c; Vertical
32; Electrode member 33; Hinge shaft
34; Clamping member 34a; Upper clamping pad
36; Gripping driver 36a; Cylinder rod
36c; Pivot 41; rail
43; Moving block 45; Mobile driver
45a; Electric motor 45b; Ball screw
51; Light irradiator 53; Optical Point Detector
55; Light point 57; Upper light
58; Lower side light 70; Plate Floating Machine
71; Nozzle 72; Inlet
73; Suction pump 74; heater
76; Temperature sensor P; Plate

Claims (6)

The frame 10,
Left and right electrode clamps 20 and 30 respectively installed on left and right sides of the upper portion of the frame 10 and holding both ends of the conductive plate P;
A power supply unit connected to the left and right electrode clamps 20 and 30 to supply current to the plate P;
Rail 41 is installed so as to extend in the left and right direction from the top of the frame 10,
A moving block 43 coupled to the electrode clamp 30 on the right side to move on the rail 41;
A movement driver 45 for driving the movement block 43 in a horizontal direction;
It is installed on the frame 10 between the left and right electrode clamps 20 and 30 to set an allowable range in which the plate P is deformed in the vertical direction when the plate P is heated by a current. A light irradiator 51 for irradiating light from the side of the plate P toward the side of the plate P,
It includes a light point detector 53 for detecting whether the light point 55 is generated on the side of the plate (P), to determine whether the plate (P) is out of the allowable range,
The electrode clamp is
A support member 31 having a lower clamping pad 31a attached to an upper surface of the front end;
An electrode member 32 electrically connected to the lower clamping pad 31a;
A hinge shaft 33 installed at the support member 31 at a rear side of the lower clamping pad 31a;
A clamping member 34 positioned above the support member 31 and axially coupled to the hinge shaft 33 and having an upper clamping pad 34a attached to a lower surface of the front end;
The clamping member 34 is pivoted about the hinge shaft 33 so that the clamping member 34 pivots about the hinge shaft 33 by being installed at the rear side of the support member 31 to vertically drive the rear end of the clamping member 34. The lower clamping pad 31a includes a grip driver 36 for cooperating to grasp or release the plate P,
The gripping driver 36 is installed on the support member 31 by a pivot shaft 36c parallel to the hinge shaft 33, so that the rear end portion of the clamping member 34 is vertically moved back and forth with respect to the pivot shaft. Heating device for electroconductive plate, characterized in that the turning in the direction The method of claim 1,
In response to receiving a signal from the optical point sensor 53 and determining that the plate P is out of the allowable range, the mobile actuator 45 is controlled to control the left and right electrode clamps 20 and 30. Further comprising a controller for controlling the moving block 43 to move in a direction away from each other. delete delete The method of claim 2,
As coupled to the frame 10, a plate pourer 70 is installed to inject air in an upward direction from the lower side of the plate (P) toward the plate (P),
When the optical point 55 does not occur, the plate floater 70 injects a predetermined flow rate of air toward the plate P under the control of the controller, so that the plate P has a predetermined height. Heating device for an electrically conductive plate, characterized in that to receive the lifting force floating The method of claim 5,
The plate floating unit 70 includes a heater 74 for heating the air to be injected, and a temperature sensor 76 for sensing the temperature of the plate (P),
The controller controls a heating temperature at which the heater 74 heats in proportion to the detected value of the temperature sensor 76,
The plate floating unit 70 is
An injection port 71 facing upward to inject air from a lower surface of the plate P, and an suction port for sucking air flowing outward after hitting the lower surface of the plate P from the outside of the injection port 71 ( 72), wherein the inhaled air is heated by the heater (74) to circulate so as to be re-injected into the injection port (71)

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