A bar rotating heating device

Abstract

A kind of bar rotation heating device, belong to bar heating equipment technical field;Adopt multiple swing plate through horizontal pivot hinge in the installation hole of rotary cylinder, form the clamping structure of " petal type " that can be synchronous radial opening and closing, the conical arc surface of swing plate bottom and the conical top block of axially movable form bevel cooperation, by ejecting cylinder push conical top block, it can stepless adjust the opening diameter of all swing plate, realize the quick self-adapting clamping and centering of different diameter bar, without replacing fixture component, solve the problem of change type complicated, long preparation time;The piston rod of ejecting cylinder and driven pulley are integrated into rotatable rotary block assembly, the linear motion of ejecting cylinder is used to drive clamping, also as driven pulley accepts belt drive and rotates, realize the synchronous of " tight " and " rotation " two actions, start rotating while clamping bar, simplify the technological process, significantly improve heating rhythm and production efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of bar heating equipment, specifically relating to a bar rotary heating device. Background Technology

[0002] Before stamping, the bar stock needs to be heated by a high-frequency heating device to facilitate stamping by the press. However, when the existing heating equipment heats the bar stock, if the bar stock is only clamped and does not rotate during heating, the induced eddy currents of the high-frequency heating will only concentrate on the side near the copper tube. The heat needs to be transferred to the side away through the component on the side closer to the copper tube, resulting in uneven circumferential heating of the bar stock and affecting the heating efficiency. At the same time, since the traditional bar stock clamping device uses a jacket or chuck with a fixed inner diameter, when bar stock of different diameters needs to be heated, the corresponding clamping component must be replaced. The operation is cumbersome, the preparation time is long, and there is a lack of flexibility, which makes it impossible to achieve rapid production changeover. Summary of the Invention

[0003] The present invention aims to solve the technical problems existing in the prior art and provide a bar stock rotary heating device.

[0004] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: A bar stock rotary heating device includes a rotary clamping device, a high-frequency heating copper tube, and a drive motor. The high-frequency heating copper tube is located above the rotary clamping device, and the drive motor is located on one side of the rotary clamping device. A drive pulley is fixedly connected to the drive shaft of the drive motor. The rotary clamping device includes a connecting plate and an ejector cylinder. The ejector cylinder is located on the lower side of the connecting plate. A rotating block is connected to the extended end of the ejector cylinder. The rotating block is rotatably connected to the extended end of the ejector cylinder. The rotating block includes a driven pulley and a conical top block, both arranged coaxially. The drive pulley and... A drive belt connects the driven pulleys. A rotating cylinder is located at the center of the connecting plate. The rotating cylinder is rotatably connected to the connecting plate. Multiple mounting holes are opened on the cylinder wall, and the mounting holes are evenly distributed in a ring along the axis. The mounting holes penetrate the cylinder wall. Each mounting hole has a locking position. Multiple swing plates are provided inside the rotating cylinder. The number of swing plates is the same as the number of mounting holes. The bottom of the inner side of the swing plate has a conical arc surface that cooperates with the conical top block. A support plate is provided on the outer side of the swing plate at the position corresponding to the mounting hole. A horizontal rotating shaft is rotatably connected to the support plate. The swing plate is locked in the locking position of the rotating cylinder mounting position through the horizontal rotating shaft.

[0005] Preferably, the top of the inner side of the swing plate is provided with a guide cone surface.

[0006] Preferably, the top of the inner surface of the rotating cylinder is provided with a guide slope that is consistent with the guide cone surface.

[0007] Preferably, the cross-sectional shape of the transmission belt is circular.

[0008] Preferably, a limiting plate is provided on the inner surface of each swing plate.

[0009] Preferably, the diameter of the pulley grooves of both the driving pulley and the driven pulley is larger than the diameter of the transmission belt.

[0010] The beneficial effects of this utility model are as follows: multiple swing plates are hinged to the mounting holes of the rotating cylinder through a horizontal rotating shaft to form a "petal-shaped" clamping structure that can open and close radially synchronously. The conical arc surface at the bottom of the swing plate and the conical top block that can move axially form an inclined surface fit. By pushing the conical top block with the ejector cylinder, the opening and closing diameter of all swing plates can be steplessly adjusted, realizing the rapid adaptive clamping and centering of bars of different diameters. There is no need to change the clamping parts, which solves the problems of complicated changeover and long preparation time.

[0011] The piston rod of the ejector cylinder and the driven pulley are integrated into a rotating block assembly that can rotate relative to each other. The linear motion of the ejector cylinder is used to drive the clamping, and it also rotates as the driven pulley by receiving belt drive. This realizes the simultaneous execution of the two actions of "clamping" and "rotation". The rotation begins at the same time as clamping the bar material, which simplifies the process and significantly improves the heating cycle and production efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the rotating cylinder and swing plate of this utility model.

[0014] In the diagram: 1. High-frequency heating copper tube; 2. Drive motor; 3. Drive pulley; 4. Connecting plate; 5. Ejector cylinder; 6. Rotating block; 7. Driven pulley; 8. Conical top block; 9. Transmission belt; 10. Rotating cylinder; 11. Mounting hole; 12. Locking position; 13. Swing plate; 14. Conical arc surface; 15. Support plate; 16. Horizontal rotating shaft; 17. Guide cone surface; 18. Guide ramp; 19. Limiting plate. Detailed Implementation

[0015] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0016] Example: A bar stock rotary heating device, such as Figures 1-2As shown, the device includes a rotary clamping device, a high-frequency heated copper tube, and a drive motor. The high-frequency heated copper tube is located above the rotary clamping device, and the drive motor is located on one side of the rotary clamping device. A drive pulley is fixedly connected to the drive shaft of the drive motor. The rotary clamping device includes a connecting plate and an ejector cylinder. The ejector cylinder is located below the connecting plate, and a rotating block is connected to the extended end of the ejector cylinder. The rotating block is rotatably connected to the extended end of the ejector cylinder. The rotating block includes a driven pulley and a conical top block, both arranged coaxially. A transmission belt connects the drive pulley and the driven pulley. The connecting plate... A rotating cylinder is located at the center of the rotating cylinder, which is rotatably connected to a connecting plate. Multiple mounting holes are formed on the cylinder wall, evenly distributed in a ring along the axis. Each mounting hole penetrates the cylinder wall and has a locking position. Multiple swing plates are located inside the rotating cylinder, the number of which matches the number of mounting holes. The bottom of the inner side of each swing plate has a conical arc surface that mates with a conical top block. A support plate is located on the outer side of each swing plate at a position corresponding to the mounting hole. A horizontal rotating shaft is rotatably connected to the support plate, and the swing plate is locked into the locking position of the rotating cylinder mounting position via the horizontal rotating shaft.

[0017] The top of the inner side of the swing plate is provided with a guide cone surface; the top of the inner surface of the rotating cylinder is provided with a guide slope that is consistent with the guide cone surface; the cross-sectional shape of the transmission belt is circular; a limiting plate is provided on the inner surface of each swing plate; the diameter of the pulley groove of the driving pulley and the driven pulley is larger than the diameter of the transmission belt.

[0018] The principle of this utility model: In use, the rotating clamping device, the high-frequency heating copper tube and the drive motor are all mounted on the frame;

[0019] The bar stock is inserted along the axis from the front end of the rotating cylinder (on the guide cone side). The piston rod of the ejector cylinder extends upward, pushing the entire rotating block assembly (including the driven pulley and the conical top block) upward. The conical top block moves upward, and its conical surface embeds into the conical arc surface at the bottom of multiple swing plates. Through the action of the inclined plane, the conical top block converts the upward thrust into a radial clamping force that forces all swing plates to swing synchronously and uniformly toward the center around their horizontal axis. All swing plates simultaneously retract inward until their inner surfaces firmly grip the bar stock. Due to multi-point synchronous linkage, the bar stock is automatically adjusted and fixed on the rotating central axis, completing the centering and clamping. The ejector cylinder maintains pressure to maintain the clamping state. In the state where the ejector cylinder is activated, the drive motor starts and drives the driven pulley to rotate via the transmission belt. Since the driven pulley and the conical top block are an integrated rotating block fixed on the same axis, and the rotating block is rotatably connected to the piston rod of the ejector cylinder (i.e., the piston rod does not rotate, but the rotating block rotates), the rotation of the driven pulley will directly drive the conical top block, as well as all the swing plates pressed by the conical top block and the clamped bar to rotate synchronously. At this time, the high-frequency heating copper tube heats the bar that is rotating at a uniform speed. The rotation ensures that the entire circumferential surface of the bar can be uniformly exposed to the alternating magnetic field, making its circumferential temperature consistent, thus achieving efficient and uniform heating.

[0020] Once heating is complete, high-frequency heating stops, the drive motor stops, and the piston rod of the ejector cylinder retracts downward, causing the rotating block and the conical top block to move downward together. The conical top block disengages from the conical arc surface at the bottom of the swing plate. After losing its internal support, the swing plate swings slightly outward by gravity or the small rebound force of the bar itself. The clamping force disappears, and the heated bar can be removed from the rotating cylinder, completing one work cycle.

[0021] When the bar stock is placed in, the guide cone and guide ramp play a role in initial guidance and centering. The circular cross-section transmission belt and wide slot ensure that the transmission remains reliable and does not slip when the main and slave pulleys are not on the same plane due to the up and down movement of the ejector cylinder. The setting of the limit plate can prevent the bar stock from falling when the swing plate is released.

[0022] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A bar stock rotary heating device, comprising a rotary clamping device, a high-frequency heating copper tube, and a drive motor, characterized in that: The high-frequency heating copper tube is positioned above the rotary clamping device, and the drive motor is located on one side of the rotary clamping device. A drive pulley is fixedly connected to the drive shaft of the drive motor. The rotary clamping device includes a connecting plate and an ejector cylinder. The ejector cylinder is located below the connecting plate, and a rotating block is connected to the extended end of the ejector cylinder. The rotating block is rotatably connected to the extended end of the ejector cylinder. The rotating block includes a driven pulley and a conical top block, both arranged coaxially. A transmission belt connects the drive pulley and the driven pulley. A rotating cylinder is located at the center of the connecting plate. The rotating cylinder is rotatably connected to the connecting plate. The rotating cylinder has multiple mounting holes on its wall, which are evenly distributed in a ring along the axis. The mounting holes penetrate the wall of the rotating cylinder, and each mounting hole has a locking position. The rotating cylinder has multiple swing plates inside, the number of which is the same as the number of mounting holes. The bottom of the inner side of each swing plate has a conical arc surface that mates with a conical top block. A support plate is provided on the outer side of each swing plate at a position corresponding to the mounting hole. A horizontal rotating shaft is rotatably connected to the support plate, and the swing plate is locked in the locking position of the rotating cylinder mounting position through the horizontal rotating shaft.

2. The bar stock rotary heating device according to claim 1, characterized in that: A guide cone surface is provided at the top of the inner side of the swing plate.

3. The bar stock rotary heating device according to claim 1, characterized in that: The top of the inner surface of the rotating cylinder is provided with a guide slope that is consistent with the guide cone surface.

4. The bar stock rotary heating device according to claim 1, characterized in that: The cross-sectional shape of the transmission belt is circular.

5. The bar stock rotary heating device according to claim 1, characterized in that: Each of the aforementioned swing plates has a limiting plate on its inner surface.

6. The bar stock rotary heating device according to claim 1, characterized in that: The diameter of the pulley grooves of both the driving pulley and the driven pulley is larger than the diameter of the transmission belt.

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