Electromagnetic heating belt for fixing plate workpieces

Abstract

The utility model discloses an electromagnetic heating belt for fixing plate workpieces, which is characterized in that clamping devices are arranged on the two sides along the length direction of a preheating track, each clamping device consists of a first clamping roller group, a second clamping roller group and a third clamping roller group, a plurality of heating belts are arranged at the positions corresponding to the interior of a heating box body, and the heating belts are arranged in the heating box body. The heating belts comprise the first heating belt and the second heating belt, the second clamping roller set is arranged at the position, corresponding to the upper portion of the preheating track, in the heating box body, an elastic assembly is arranged at the rear end of the second clamping roller set, the first heating belt heats the bottom face of a workpiece, and the second heating belt heats the bottom face of the workpiece. The second heating belt is pressed downwards to be close to the surface of the workpiece through the second clamping roller set, when plate workpieces of different thicknesses are machined, the second clamping roller set can be driven by the elastic assembly to press downwards, the heating face of the second heating belt is kept to be close to the plate, and efficient energy-saving heating of the welding position of the plate is achieved. And meanwhile, the welding surface of the plate is heated more uniformly.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic heating devices, in particular to an electromagnetic heating belt for fixing plate-type workpieces. Background Art

[0002] The welding process requires that pipes, cylinders and flat plate workpieces made of medium and thick wall (greater than 13mm) high-strength steel, high-alloy steel and other materials need to be preheated before welding, the interlayer temperature needs to be maintained (temperature maintenance) during welding, and auxiliary heating treatments such as hydrogen removal are required after welding.

[0003] For the welding heating of the above-mentioned workpieces, gas heating and resistive heating are currently the main process modes used at home and abroad. Natural gas heating is to use gas tools to burn natural gas to heat the outer surface of the workpiece, but open flame operations have serious safety hazards. Resistive heating is to wrap resistance wires around the inner and outer surfaces of the workpiece, and conduct and radiate heat from the resistance wires to the workpiece, but resistance heating devices are prone to aging and have a short service life, resulting in excessively high production costs. In addition, the above two heating methods require higher process standards when heating the plate, otherwise it will lead to uneven heating of the plate, affecting the subsequent welding effect. Utility Model Content

[0004] In view of the technical defects existing in the background technology, the utility model proposes an electromagnetic heating belt for fixing plate-like workpieces, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0005] An electromagnetic heating belt for fixing plate-like workpieces comprises a base and a heating box body arranged in the middle of the base, a preheating track is arranged along the length direction of the base, clamping devices are arranged on both sides along the length direction of the preheating track, the clamping device is composed of a first clamping roller group, a second clamping roller group and a third clamping roller group arranged in sequence from front to back along the conveying direction of the preheating track, the end of the preheating track extends into the heating box body, and a plurality of heating belts are arranged at positions corresponding to the positions in the heating box body, the heating belts comprise a first heating belt arranged on the preheating track and a second heating belt arranged above the preheating track, the second clamping roller group is arranged in the heating box body at a position corresponding to the top of the preheating track, and an elastic component is arranged at the rear end of the second clamping roller group.

[0006] As an improvement of the above scheme, the heating box is provided with a feed port and a discharge port at both ends thereof corresponding to the transmission direction of the preheating track, a first clamping roller group is provided near the feed port of the preheating track, and a third clamping roller group is provided near the discharge port.

[0007] As an improvement of the above scheme, the first clamping roller group includes at least two first rollers respectively arranged on both sides of the preheating track and first brackets matching the number of the first rollers, a first bracket is connected between the first roller and the base, and the top end height of the first roller is not lower than the bottom end surface height of the heating box.

[0008] As an improvement of the above scheme, the second clamping roller group includes at least four second rollers that are symmetrically arranged near the two ends of the heating box and second brackets that match the number of the second rollers. A second bracket is connected between the second roller and the top inner wall of the heating box, and the second bracket is hingedly connected to the heating box.

[0009] As an improvement of the above solution, the second bracket is inclined toward the rear end direction of the length direction of the preheating track, and an elastic component is provided at the angle between the second bracket and the heating box, and the elastic component is a torsion spring.

[0010] As an improvement of the above solution, the first heating belt is arranged in a ring shape along the width direction of the preheating track, and the second heating belt is arranged above the first heating belt and along the width direction of the heating box.

[0011] As an improvement of the above solution, a fixed bracket is provided on the top inner wall of the heating box body, the outer edges of the fixed bracket are respectively connected to the second bracket in the second clamping roller group, and the second heating belt is fixed on the end face of the fixed bracket facing the first heating belt.

[0012] As an improvement of the above solution, the end surface of the first heating belt facing the preheating track is provided with a first high-temperature resistant flame-retardant cloth layer, and the end surface of the second heating belt facing the fixed bracket is provided with a second high-temperature resistant flame-retardant cloth layer.

[0013] The beneficial effect of the utility model is that the heating belt generates a high-speed changing alternating magnetic field by passing a high-frequency and high-voltage current through the coil at a high speed. The surface of the container cuts the alternating magnetic lines of force and generates an alternating current (i.e., eddy current) in the metal part at the bottom of the container. The eddy current causes the carriers at the bottom of the container to move irregularly at a high speed. The carriers collide and rub against each other to generate heat energy, thereby heating the workpiece. The first heating belt heats the bottom surface of the workpiece, and the second heating belt is pressed down to the surface of the workpiece by the second clamping roller group. When processing plate-type workpieces of different thicknesses, the second clamping roller group can be driven downward by the elastic component to keep the heating surface of the second heating belt close to the plate, thereby achieving efficient and energy-saving heating of the plate welding position and more uniform heating of the plate welding surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 This is a schematic diagram of the position structure of the first heating zone of the utility model.

[0016] Figure 3 It is a schematic diagram of the internal structure of the heating box of the present utility model.

[0017] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A.

[0018] Wherein: base 1, heating box 2, feed port 201, discharge port 202, preheating track 3, first clamping roller group 4, first roller 401, first bracket 402, second clamping roller group 5, second roller 501, second bracket 502, third clamping roller group 6, first heating belt 7, high temperature resistant flame retardant cloth layer 1 701, second heating belt 8, high temperature resistant flame retardant cloth layer 2 801, elastic component 9, fixed bracket 10. DETAILED DESCRIPTION

[0019] The implementation methods of the present invention are described below in conjunction with the accompanying drawings and relevant embodiments. The implementation methods of the present invention are not limited to the following embodiments, and the present invention involves relevant necessary components in this technical field, which should be regarded as common knowledge in this technical field and can be known and mastered by technical personnel in this technical field.

[0020] like Figures 1 to 4 As shown, an electromagnetic heating belt for fixing plate-like workpieces comprises a base 1 and a heating box 2 arranged in the middle of the base 1, a preheating track 3 is arranged along the length direction of the base 1, and clamping devices are arranged on both sides along the length direction of the preheating track 3, the clamping device is composed of a first clamping roller group 4, a second clamping roller group 5 and a third clamping roller group 6 arranged in sequence from front to back along the conveying direction of the preheating track 3, the end of the preheating track 3 extends into the heating box 2, and a plurality of heating belts are arranged at positions corresponding to the positions in the heating box 2, the heating belts comprise a first heating belt 7 arranged on the preheating track 3 and a second heating belt 8 arranged above the preheating track 3, the second clamping roller group 5 is arranged in the heating box 2 at a position corresponding to the top of the preheating track 3, and an elastic component 9 is provided at the rear end of the second clamping roller group 5.

[0021] Structurally, the utility model is that the length direction of the preheating track 3 passes through the heating box 2, and the workpiece is preheated by the heating belt in the heating box 2, wherein the first clamping roller group 4 and the third clamping roller group 6 are used to support the bottom surface of the workpiece, and the second clamping roller group 5 is used to fit the second heating belt 8 to the upper surface of the workpiece. When in use, the workpiece enters the heating box 2 along the feeding port 201 of the heating box 2, and the welding position of the workpiece is aligned with the first heating belt 7 and the second heating belt 8, and the first heating belt 7 and the second heating belt 8 are used to preheat both sides of the workpiece at the same time.

[0022] In the first embodiment of the utility model, when the position to be welded is on the surface of the workpiece, the workpiece extends into the heating box 2 along one end of the feed port 201 and extends out from the discharge port 202. The two ends of the workpiece are respectively placed on the first clamping roller group 4 and the third clamping roller group 6. The position of the workpiece to be welded is aligned with the first heating belt 7 and the second heating belt 8. The first heating belt 7 heats the bottom surface of the workpiece. When the second clamping roller group 5 presses the upper surface of the workpiece, the second heating belt 8 adheres to the surface of the workpiece to preheat the position on the surface of the workpiece to be welded.

[0023] In the second embodiment of the utility model, when the position requiring welding is at the end of the workpiece, the workpiece enters along the inlet 201 of the heating box 2, and the other workpiece enters along the outlet 202 of the heating box 2, and the ends of the two workpieces extend between the first heating belt 7 and the second heating belt 8, and the welding preheating process of the ends of the two workpieces is completed simultaneously by the first heating belt 7 and the second heating belt 8.

[0024] Furthermore, in the above scheme, the heating box 2 is provided with an inlet 201 and an outlet 202 at both ends thereof corresponding to the transmission direction of the preheating track 3, and the preheating track 3 is provided with a first clamping roller group 4 near the inlet 201, and a third clamping roller group 6 near the outlet 202.

[0025] It should be noted that, preferably, the heating box body 2 is of a flip-cover type, and the second heating belt 8 can be fitted to the surface of the workpiece by opening and closing the heating box body 2. The second clamping roller group 5 can control the second heating belt 8 to maintain the same gap when facing workpieces of different thicknesses, and at the same time, the risk of electric shock when manually placing the heating belt on the workpiece can be avoided. One side of the heating box body 2 is hingedly connected to the base 1, and the hinged structure is a hinge. In use, a longer workpiece can extend into the heating box body 2 through the feed port 201 or the discharge port 202 at the end of the heating box body 2, and a shorter workpiece can be directly placed on the first heating belt 7 for preheating by opening the heating box body 2.

[0026] Furthermore, in the above scheme, the first clamping roller group 4 includes at least two first rollers 401 respectively arranged on both sides of the preheating track 3 and first brackets 402 matching the number of the first rollers 401, and a first bracket 402 is connected between the first rollers 401 and the base 1, and the top height of the first roller 401 is not lower than the bottom end surface height of the heating box 2. It should be noted that when the workpiece slides into the heating box 2 along one end of the feed port of the heating box 2 and is thicker and heavier, the workpiece can be easily moved into the heating box 2 by the first roller 401.

[0027] It should be noted that the third clamping roller group 6 has the same structure as the first clamping roller group 4. When a workpiece slides into the heating box 2 along one end of the outlet 202 of the heating box 2, or slides out from the inlet 201 toward the outlet 202, the third clamping roller group 6 can easily move the workpiece into the heating box 2 when the workpiece is thicker and heavier.

[0028] Furthermore, in the above scheme, the second clamping roller group 5 includes at least four second rollers 501 symmetrically arranged near the two ends of the heating box 2 and second brackets 502 matching the number of the second rollers 501, and a second bracket 502 is connected between the second roller 501 and the top inner wall of the heating box 2, and the second bracket 502 is hingedly connected to the heating box 2.

[0029] Furthermore, in the above solution, the second bracket 502 is inclined toward the rear end direction of the length direction of the preheating track 3, and an elastic component 9 is provided at an angle between the second bracket 502 and the heating box 2, and the elastic component 9 is a torsion spring.

[0030] Furthermore, in the above scheme, the first heating belt 7 is arranged in a ring shape along the width direction of the preheating track 3 , and the second heating belt 8 is arranged above the first heating belt 7 and along the width direction of the heating box 2 .

[0031] It should be noted that when the thickness of the workpiece is relatively thick, the workpiece pushes the second roller 501 upward to compress the elastic component 9, the torsion spring between the second bracket 502 and the heating box 2 is compressed, the distance between the first roller 401 and the second roller 501 becomes larger, and the second clamping roller group 5 drives the second heating belt 8 to rise synchronously. When the thickness of the workpiece is relatively small, the elastic component 9 controls the second roller 501 to press down, and drives the second heating belt 8 to press down synchronously, thereby completing the double-sided preheating of the workpiece, and can be adapted to workpieces of various different thicknesses.

[0032] Furthermore, in the above scheme, a fixed bracket 10 is provided on the top inner wall of the heating box body 2, and the outer edges of the fixed bracket 10 are respectively connected to the second bracket 502 in the second clamping roller group 5, and the second heating belt 8 is fixed on the end face of the fixed bracket 10 facing the first heating belt 7.

[0033] It should be noted that the end of the fixed bracket 10 is connected to the end of the second bracket 502 , and the axis point of the hinge position is aligned with the axis point of the second roller 501 .

[0034] Furthermore, in the above scheme, the end surface of the first heating belt 7 facing the preheating track 3 is provided with a high temperature resistant flame retardant cloth layer 1 701, and the end surface of the second heating belt 8 facing the fixed bracket 10 is provided with a high temperature resistant flame retardant cloth layer 2 801.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An electromagnetic heating belt for fixing plate-like workpieces, characterized in that: The invention comprises a base (1) and a heating box (2) arranged in the middle of the base (1); a preheating track (3) is arranged along the length direction of the base (1); clamping devices are arranged on both sides along the length direction of the preheating track (3); the clamping device comprises a first clamping roller group (4), a second clamping roller group (5) and a third clamping roller group (6) arranged in sequence from front to back along the conveying direction of the preheating track (3); the end of the preheating track (3) extends into the heating box (2), and a plurality of heating belts are arranged at positions corresponding to those in the heating box (2); the heating belts comprise a first heating belt (7) arranged on the preheating track (3) and a second heating belt (8) arranged above the preheating track (3); the second clamping roller group (5) is arranged in the heating box (2) at a position corresponding to the position above the preheating track (3), and an elastic component (9) is arranged at the rear end of the second clamping roller group (5).

2. The electromagnetic heating belt for fixing plate-like workpieces according to claim 1, characterized in that: The heating box (2) is provided with an inlet (201) and an outlet (202) at both ends thereof corresponding to the transmission direction of the preheating track (3); a first clamping roller group (4) is provided at a position of the preheating track (3) close to the inlet (201), and a third clamping roller group (6) is provided at a position close to the outlet (202).

3. The electromagnetic heating belt for fixing plate-like workpieces according to claim 1, characterized in that: The first clamping roller group (4) comprises at least two first rollers (401) respectively arranged on both sides of the preheating track (3) and first brackets (402) matching the number of the first rollers (401), the first brackets (402) being connected between the first rollers (401) and the base (1), and the top height of the first rollers (401) being not less than the bottom end surface height of the heating box (2).

4. The electromagnetic heating belt for fixing plate-like workpieces according to claim 1, characterized in that: The second clamping roller group (5) comprises at least four second rollers (501) symmetrically arranged near the two ends of the heating box (2) and second brackets (502) matching the number of the second rollers (501); the second bracket (502) is connected between the second rollers (501) and the top inner wall of the heating box (2); and the second bracket (502) is hingedly connected to the heating box (2).

5. The electromagnetic heating belt for fixing plate-like workpieces according to claim 4, characterized in that: The second bracket (502) is inclined towards the rear end direction of the length direction of the preheating track (3), and an elastic component (9) is provided at the angle between the second bracket (502) and the heating box (2), and the elastic component (9) is a torsion spring.

6. The electromagnetic heating belt for fixing plate-like workpieces according to claim 1, characterized in that: The first heating belt (7) is arranged in a ring shape along the width direction of the preheating track (3), and the second heating belt (8) is arranged above the first heating belt (7) and along the width direction of the heating box (2).

7. The electromagnetic heating belt for fixing plate-like workpieces according to claim 4, characterized in that: A fixed bracket (10) is provided on the inner wall of the top end of the heating box body (2), and the outer edges of the fixed bracket (10) are respectively connected to the second bracket (502) in the second clamping roller group (5), and the second heating belt (8) is fixed on the end surface of the fixed bracket (10) facing the first heating belt (7).

8. The electromagnetic heating belt for fixing plate-like workpieces according to claim 7, characterized in that: The end surface of the first heating belt (7) facing the preheating track (3) is provided with a first high-temperature resistant flame-retardant cloth layer (701), and the end surface of the second heating belt (8) facing the fixed bracket (10) is provided with a second high-temperature resistant flame-retardant cloth layer (801).

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