A preheating device for weld overlay workpieces

Abstract

This utility model relates to a preheating device for surfacing workpieces, including a frame with a panel. A rotating disk is rotatably mounted on the frame panel, and a bearing seat is located on the top of the rotating disk. A workpiece placement plate is mounted at the center of the top of the bearing seat. The bearing seat has several inverted L-shaped guide rails evenly distributed around the circumference of the workpiece placement plate. Clamping components for holding the workpiece placed on the workpiece placement plate are slidably mounted on the inverted L-shaped guide rails. The frame has two sets of preheating components symmetrically arranged around the center of the workpiece placement plate. Each preheating component includes a Z-shaped frame slidably mounted on the frame, with an induction heating coil detachably mounted on the upper end of the Z-shaped frame to surround and enclose the part of the workpiece to be heated. This utility model achieves uniform and efficient preheating of the workpiece by rotating the rotating disk to drive the bearing seat and the workpiece placement plate to rotate, thereby rotating the workpiece. The distance between the induction heating coil and the workpiece is adjusted by the Z-shaped frame, thus achieving a uniform and efficient preheating effect on the workpiece.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a preheating device for surfacing workpieces. Background Technology

[0002] As an important material surface treatment technology, surfacing is mainly used to improve the wear resistance, corrosion resistance and high temperature resistance of workpiece surfaces. It is widely used in the repair and strengthening of mechanical parts and has been widely applied in industries such as machinery, metallurgy, mining and power.

[0003] During the surfacing process, welding defects such as hot cracks and deformation often occur in the welded workpiece due to uneven local heating or excessively high temperature. Therefore, preheating of the workpiece is a key step in ensuring welding quality in the surfacing process. Appropriate preheating can reduce the thermal stress caused by excessive temperature difference, prevent cracks from forming, improve the weldability of the workpiece, and improve the quality of surfacing.

[0004] Traditional workpiece preheating methods typically employ flame heating or resistance heating. However, flame preheating suffers from inaccurate temperature control, uneven heating, and a tendency to cause workpiece deformation. Fixed resistance heating devices have poor adaptability and struggle to meet the preheating requirements of workpieces with different shapes. In particular, existing preheating methods are insufficient for uniform preheating of cylindrical, disc-shaped, and other workpieces that require rotational heating. Utility Model Content

[0005] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a preheating device for weld overlay workpieces that can uniformly and efficiently preheat the workpieces.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a preheating device for surfacing workpieces, including a frame with a panel, a rotating disk rotatably provided on the panel of the frame, a bearing seat provided on the top of the rotating disk, a workpiece placement plate installed at the center of the top of the bearing seat, a plurality of inverted L-shaped guide rails evenly distributed around the circumference of the workpiece placement plate on the bearing seat, a clamping component for clamping the workpiece placed on the workpiece placement plate slidably provided on the inverted L-shaped guide rails, and two sets of preheating components symmetrically arranged with respect to the center of the workpiece placement plate on the frame, the preheating component including a Z-shaped frame slidably arranged on the frame, and an induction heating coil that can surround and wrap around the part of the workpiece to be heated is detachably installed on the upper end of the Z-shaped frame.

[0007] To drive the rotating disk to rotate, a right-angle frame is fixed to the rear end of the frame panel. A first motor is mounted on the horizontal plate of the right-angle frame, and the output shaft of the first motor is connected to the center of the bottom surface of the rotating disk.

[0008] Specifically, the clamping assembly includes a sliding frame slidably disposed on the top of an inverted L-shaped guide rail. A clamping plate is rotatably mounted on the upper end of the sliding frame via a fixed shaft. A torsion spring is wound around the fixed shaft, and the two ends of the torsion spring are respectively connected to the clamping plate and the sliding frame.

[0009] Preferably, the clamping plate has a U-shaped structure, and a rubber block is provided at the end of the clamping plate that contacts the workpiece.

[0010] Furthermore, a rotating frame is rotatably mounted on the bearing seat, the workpiece placement plate passes through the central hole opened on the rotating frame, and the inverted L-shaped guide rail is located on the outside of the rotating frame; a spiral groove is opened on the top of the rotating frame, and a slider that can slide in the spiral groove is provided at the bottom of the sliding frame.

[0011] To enable the rotation of the rotating frame, a bevel gear ring is provided at the bottom of the rotating frame, a second motor is installed on the bearing seat, and a bevel gear that meshes with the bevel gear ring is installed on the output shaft of the second motor.

[0012] Furthermore, four guide rods arranged in a matrix are fixed to the bottom surface of the frame panel. A mounting plate is connected to the guide rods in a height-adjustable manner. A dual-axis motor is mounted on the mounting plate. The two output shafts of the dual-axis motor are each connected to a lead screw with opposite rotation directions. The lead screw is threaded to the lower end of the Z-shaped frame.

[0013] To facilitate the lifting and lowering of the mounting plate, an electric push rod is fixed to the bottom surface of the frame and located below the mounting plate. The movable end of the electric push rod is connected to the bottom of the mounting plate, thereby driving the mounting plate to lift and lower vertically along the guide rod.

[0014] To facilitate intelligent operation, a mounting base for installing a robotic arm is fixed to the end of the frame panel.

[0015] The beneficial effects of this utility model are: This utility model drives the bearing seat and workpiece placement plate to rotate by rotating the rotating disk, thereby driving the workpiece to rotate, and then adjusts the distance between the induction heating coil and the workpiece by the Z-shaped frame, thereby achieving a uniform and efficient preheating effect of the preheating component on the workpiece. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention.

[0019] Figure 3 This is an exploded structural diagram of the rotating frame, inverted L-shaped guide rail, and bearing seat described in this utility model.

[0020] Figure 4 This is a three-dimensional structural diagram of the clamping assembly described in this utility model.

[0021] Figure 5 This is a partial three-dimensional structural schematic diagram of the present invention.

[0022] In the diagram: 1-Frame, 2-First motor, 3-Rotating disk, 4-Bearing seat, 5-Workpiece placement plate, 6-Rotating frame, 7-Bevel gear ring, 8-Bevel gear, 9-Second motor, 10-Helical groove, 11-Inverted L-shaped guide rail, 12-Sliding frame, 121-Slider, 13-Fixed shaft, 14-Clamping plate, 15-Torsion spring, 16-Rubber block, 17-Guide rod, 18-Mounting plate, 19-Dual-axis motor, 20-Lead screw, 21-Z-shaped frame, 22-Induction heating coil, 23-Electric push rod, 24-Mounting base. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0024] like Figure 1 The preheating device for surfacing workpieces shown includes a frame 1 with a panel, a first motor 2, a rotating disk 3, a bearing seat 4, a workpiece placement plate 5, a clamping assembly, and a preheating assembly. The frame 1 provides support for the entire device. The rotating disk 3 is rotatably mounted on the panel of the frame 1. A right-angle bracket is fixed to the rear end of the panel of the frame 1. The first motor 2 is mounted on the horizontal plate of the right-angle bracket. The output shaft of the first motor 2 is fixedly connected to the center of the bottom surface of the rotating disk 3 to drive the rotating disk 3 to rotate.

[0025] The bearing seat 4 is mounted on the upper surface of the rotating disk 3, and the workpiece placement plate 5 is disposed on the bearing seat 4. Three sets of guide rails are evenly distributed around the workpiece placement plate 5 on the bearing seat 4. Each set of guide rails consists of two parallel inverted L-shaped guide rails 11. Each set of guide rails 11 is provided with a clamping component for clamping the workpiece placed on the workpiece placement plate 5. Preheating components for preheating the workpiece placed on the workpiece placement plate 5 are symmetrically slidably disposed on both sides of the frame 1.

[0026] like Figures 2-4As shown, the clamping assembly includes a sliding frame 12 slidably disposed on the top of the inverted L-shaped guide rail 11, a clamping plate 14 rotatably mounted on the upper end of the sliding frame 12 via a fixed shaft 13, and a torsion spring 15 wound around the fixed shaft 13. The two ends of the torsion spring 15 are respectively connected to the clamping plate 14 and the sliding frame 12. The sliding frame 12 is horizontally L-shaped. When the sliding frame 12 slides horizontally along the L-shaped guide rail 11, the clamping plate 14 automatically applies clamping force to the workpiece under the action of the torsion spring 15. Since the clamping plate 14 is U-shaped, it can effectively clamp workpieces of different sizes at the top and bottom.

[0027] like Figure 4 As shown, a rubber block 16 is provided at the end of the clamping plate 14 that contacts the workpiece. The rubber block 16 can increase the friction coefficient between the clamping plate 14 and the workpiece, and improve the clamping force of the clamping plate 14. At the same time, the rubber block 16 can avoid rigid contact between the clamping plate 14 and the workpiece surface, which is beneficial to protect the workpiece and the clamping plate 14.

[0028] like Figure 2 and Figure 3 As shown, a rotating frame 6 is rotatably mounted on the bearing seat 4 via a rolling bearing. The rotating frame 6 consists of a hollow cylindrical tube that rotates in contact with the bearing on the bearing seat 4 and a disc mounted on the top of the hollow cylindrical tube. The workpiece placement plate 5 passes through a through hole in the disc and the inner hole of the hollow cylindrical tube. The rotating frame 6 is located between inverted L-shaped guide rails 11. A spiral groove 10 is formed on the surface of the disc at the top of the rotating frame 6. The bottom of the sliding frame 12 has a slider 121 that can slide within the spiral groove 10. The shape of the slider 121 is adapted to the structure of the spiral groove 10.

[0029] like Figure 2 and Figure 3 As shown, a bevel gear ring 7 is provided around the bottom of the rotating frame 6. A bevel gear 8 that meshes with the bevel gear ring 7 is installed on the output shaft of the second motor 9 mounted on the bearing seat 4. When the second motor 9 is working, its output shaft meshes with the bevel gear ring 7 through the bevel gear 8, thereby driving the rotating frame 6 to rotate. When the rotating frame 6 rotates, the slider 121 moves along the spiral groove 10, thereby driving the sliding frame 12 to move horizontally along the inverted L-shaped guide rail 11, which in turn causes the clamping plate 14 to move closer to or further away from the workpiece.

[0030] The mounting structure of the above-mentioned clamping assembly enables the clamping plate 14 to adaptively clamp workpieces of different shapes and sizes through the horizontal movement of the sliding frame 12 along the inverted L-shaped guide rail 11 and the cooperation of the clamping plate 14, the fixed shaft 13 and the torsion spring 15, and to provide a constant clamping force under the action of the torsion spring 15; the rotation of the rotating frame 6 is achieved through the cooperation of the second motor 9, the bevel ring 7 and the bevel gear 8, so that the slider 121 at the bottom of the sliding frame 12 moves along the spiral groove 10, thereby achieving the effect of dynamically adjusting the clamping force of the clamping plate 14.

[0031] like Figure 5 As shown, the preheating assembly includes two Z-shaped frames 21 that are slidably disposed on the panel of the frame 1. An induction heating coil 22 is detachably mounted on the upper end of the Z-shaped frame 21. Since the induction heating coil 22 is detachably mounted on the upper end of the Z-shaped frame 21, the appropriate induction heating coil 22 can be flexibly selected according to the shape and specifications of the workpiece.

[0032] like Figure 1 , Figure 5 As shown, four guide rods 17 arranged in a matrix are fixed to the bottom surface of the panel of the frame 1. A mounting plate 18 is connected to the guide rods 17 in a height-adjustable manner. A dual-axis motor 19 is mounted on the mounting plate 18. The two output shafts of the dual-axis motor 19 are each connected to a lead screw 20 with opposite rotation directions. The lead screw 20 is threadedly connected to the lower end of the Z-shaped frame 21.

[0033] An electric push rod 23 located below the mounting plate 18 is fixed on the bottom surface of the frame 1. The movable end of the electric push rod 23 is connected to the bottom of the mounting plate 18 and drives the mounting plate 18 to rise and fall vertically along the guide rod 17.

[0034] The installation structure of the preheating component is achieved by driving the screws 20 with opposite rotation directions through the dual-axis motor 19 to adjust the distance between the two Z-shaped frames 21, thereby adjusting the distance between the induction heating coil 22 and the workpiece. The mounting plate 18 is raised and lowered through the electric push rod 23, thereby adjusting the height of the Z-shaped frame 21 and the induction heating coil 22, so as to achieve precise adjustment of the height of the preheating component.

[0035] like Figure 5 As shown, the frame 1 is also provided with a mounting base 24 for mounting the robotic arm to facilitate intelligent operation.

[0036] In use, the workpiece to be preheated is placed on the workpiece placement plate 5. The second motor 9 is started, and the second motor 9 drives the rotating frame 6 to rotate through the meshing transmission of the bevel gear 8 and the bevel gear ring 7. Then, through the sliding engagement of the spiral groove 10 and the slider 121, the three sliding frames 12 move synchronously towards the workpiece along the inverted L-shaped guide rail 11, realizing the clamping of the workpiece by the clamping plate 14. Then, the mounting plate 18 is pushed up and down along the guide rod 17 by the electric push rod 23 to adjust the height position of the preheating component. The dual-axis motor 19 is started to drive the lead screw 20 to rotate, so that the two Z-shaped frames 21 move synchronously towards or away from each other, adjusting the preheating distance so that the induction heating coil 22 is close to the part of the workpiece to be preheated. The first motor 2 operates, driving the rotating disk 3 to rotate, which in turn drives the bearing seat 4 and the workpiece to rotate synchronously. When the workpiece rotates, it moves relative to the induction heating coil 22. When the induction heating coil 22 is energized, it generates an alternating magnetic field, which causes eddy currents to be generated inside the rotating workpiece and heats it up, thus achieving uniform preheating of the workpiece. After preheating is completed, the dual-axis motor 19 reverses, driving the Z-shaped frame 21 and the induction heating coil 22 away from the workpiece. The second motor 9 reverses, causing the clamping assembly to move away from the workpiece and release the clamp on the workpiece. Finally, the robotic arm on the mounting base 24 removes the preheated workpiece from the workpiece placement plate 5.

[0037] This invention uses a first motor 2 to drive a rotating disk 3 to rotate, which in turn drives the bearing seat 4 and the workpiece placement plate 5 to rotate, thereby driving the workpiece to rotate. The rotating workpiece is then preheated by a preheating assembly, thus achieving a uniform and efficient preheating effect on the workpiece.

[0038] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A cladding workpiece preheating device comprising a frame (1) with a faceplate, characterized in that: The frame (1) is provided with a rotating disk (3) on its panel. The top of the rotating disk (3) is provided with a bearing seat (4). The top center of the bearing seat (4) is provided with a workpiece placement plate (5). The bearing seat (4) is provided with several inverted L-shaped guide rails (11) evenly distributed around the workpiece placement plate (5). The inverted L-shaped guide rails (11) are provided with a clamping assembly for clamping the workpiece placed on the workpiece placement plate (5). The frame (1) is provided with two sets of preheating assemblies symmetrically arranged with respect to the center of the workpiece placement plate (5). The preheating assembly includes a Z-shaped frame (21) slidably arranged on the frame (1). The upper end of the Z-shaped frame (21) is detachably installed with an induction heating coil (22) that can surround and wrap the part of the workpiece to be heated.

2. The surfacing workpiece preheating apparatus of claim 1, wherein: The rear end of the panel of the frame (1) is fixed with a right-angle frame, and a first motor (2) is installed on the horizontal plate of the right-angle frame. The output shaft of the first motor (2) is connected to the center of the bottom surface of the rotating disk (3).

3. The surfacing workpiece preheating apparatus of claim 1, wherein: The clamping assembly includes a sliding frame (12) slidably disposed on the top of the inverted L-shaped guide rail (11). A clamping plate (14) is rotatably mounted on the upper end of the sliding frame (12) via a fixed shaft (13). A torsion spring (15) is wound around the fixed shaft (13). The two ends of the torsion spring (15) are respectively connected to the clamping plate (14) and the sliding frame (12).

4. The surfacing workpiece preheating apparatus of claim 3, wherein: The clamping plate (14) has a U-shaped structure, and a rubber block (16) is provided at the end of the clamping plate (14) that contacts the workpiece.

5. The surfacing workpiece preheating apparatus of claim 3, wherein: The bearing seat (4) is rotatably provided with a rotating frame (6), the workpiece placement plate (5) passes through the central hole opened on the rotating frame (6), and the inverted L-shaped guide rail (11) is located outside the rotating frame (6); the top of the rotating frame (6) is provided with a spiral groove (10), and the bottom of the sliding frame (12) is provided with a slider (121) that can slide in the spiral groove (10).

6. The surfacing workpiece preheating apparatus of claim 5, wherein: The rotating frame (6) is provided with a bevel gear ring (7) at the bottom, and a second motor (9) is installed on the bearing seat (4). A bevel gear (8) that meshes with the bevel gear ring (7) is installed on the output shaft of the second motor (9).

7. The surfacing workpiece preheating apparatus of claim 1, wherein: The bottom surface of the frame (1) panel is fixed with four guide rods (17) arranged in a matrix. The guide rods (17) are connected to a mounting plate (18) that can be raised and lowered. The mounting plate (18) is equipped with a dual-axis motor (19). The two output shafts of the dual-axis motor (19) are each connected to a lead screw (20) with opposite rotation directions. The lead screw (20) is threaded to the lower end of the Z-shaped frame (21).

8. The surfacing workpiece preheating apparatus of claim 7, wherein: The bottom surface of the frame (1) is fixed with an electric push rod (23) located below the mounting plate (18). The movable end of the electric push rod (23) is connected to the bottom of the mounting plate (18) to drive the mounting plate (18) to rise and fall vertically along the guide rod (17).

9. The preheating device for weld overlay workpieces as described in claim 1, characterized in that: The end of the panel of the frame (1) is fixed with a mounting base (24) for mounting a robotic arm.

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