Bar high-frequency heating device
By integrating defect diagnosis, temperature control, and fixing components into a high-frequency heating device for bar stock, the problems of low yield, inaccurate temperature control, and damage during clamping in existing technologies have been solved. This device achieves precise heating and stability of bar stock, is compatible with multiple bar stock specifications, and improves automation and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-03-17
AI Technical Summary
Existing high-frequency heating devices lack pre-defect detection, resulting in low yield; inaccurate temperature control, with large temperature differences between the core and surface; fixed heating units, making it difficult to adapt to various bar specifications; and the clamping process is prone to damaging the bar, with poor positioning accuracy, low automation, and safety hazards.
A high-frequency heating device for bar stock, comprising a defect diagnosis unit, a temperature control unit, a heating unit, a fixing component, and a central control module, was designed. The defect diagnosis unit screens qualified bar stock, the temperature control unit monitors and adjusts the temperature in real time, the heating unit uses a retractable induction coil and a servo drive mechanism to adapt to bar stock of different specifications, and the fixing component uses a drive component and a clamping component to clamp the bar stock in a coordinated manner to ensure the center positioning of the bar stock and avoid uneven heating.
It achieves precise heating of bar stock, avoids reduced yield due to defects, ensures temperature uniformity and stability, adapts to bar stock of different specifications, protects bar stock surface, improves automation level, and reduces safety hazards.
Smart Images
Figure CN121669830A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of heating technology in mechanical manufacturing, specifically a high-frequency heating device for bar stock. Background Technology
[0002] In the field of mechanical manufacturing, bar heating is a crucial pre-processing step for subsequent steps such as forging and heat treatment. High-frequency induction heating is widely used due to its advantages of high thermal efficiency and rapid heating rate. However, existing high-frequency heating devices still face many technical bottlenecks in actual production, making it difficult to meet the needs of precision manufacturing.
[0003] Traditional equipment often lacks a pre-defect detection mechanism, directly heating bars with surface cracks and internal inclusions, leading to a significant reduction in the yield of subsequent processing. In terms of temperature control, relying solely on single-surface temperature measurement easily causes temperature discrepancies between the core and surface layers, failing to adapt to the different heat penetration depth requirements of various processes. The induction coils of the heating unit are mostly of a fixed structure, making it difficult to match bars of various specifications, and the lack of real-time current monitoring easily leads to uneven heating due to load fluctuations.
[0004] The clamping process presents particularly significant problems. Rigid clamping can easily damage the surface of the bar stock, and its positioning accuracy is poor. Bar stock misalignment leads to a decrease in induction heating efficiency. Furthermore, the multiple independent operations of each unit, relying on manual coordination, result in low automation and safety hazards. Therefore, this invention proposes a high-frequency bar stock heating device to address these issues. Summary of the Invention
[0005] The purpose of this invention is to provide a high-frequency heating device for bar stock to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-frequency heating device for bar stock, comprising a frame, a defect diagnosis unit, a temperature control unit, a heating unit, a fixing component, a conveying unit, and a central control module. Each unit is electrically connected to the central control module to achieve coordinated control. The defect diagnosis unit is used to detect surface and internal defects of the bar stock and screen bar stock that meets the heating requirements.
[0007] The temperature control unit is used to monitor the temperature of the heating area in real time, feed back temperature data, and adjust heating parameters to maintain the target temperature.
[0008] The heating unit is used to convert the power frequency AC power into high frequency AC power, and generate an alternating magnetic field through the induction coil to generate eddy currents and Joule heat inside the bar stock, thereby achieving rapid heating of the bar stock.
[0009] The fixing component is used to position and clamp the bar stock, ensuring that the bar stock is at the center of the induction coil during the heating process;
[0010] The fixing component includes a driving component and a clamping component. The driving component is used to drive the clamping component fixedly connected at the top to move horizontally, so that the clamping component can retract inward, thereby fitting and fixing the outer surface of the bar stock and ensuring the stability of the heating process.
[0011] The conveying unit is used to convey the bar stock to be heated to the clamping area of the fixing component, and at the same time convey the heated bar stock to the next process.
[0012] As a preferred technical solution of the present invention, the temperature control unit includes a surface infrared thermometer, a core temperature measuring component, and a dual-frequency power supply module. The surface infrared thermometer monitors the surface temperature and temperature gradient of the bar stock, and the core temperature is calculated by combining the detection data of the core temperature measuring component. The dual-frequency power supply module can switch between high and low frequency power output to adapt to the process requirements of core heating and surface heating of the bar stock, respectively.
[0013] As a preferred embodiment of the present invention, the heating unit includes a retractable induction coil, a servo drive mechanism, and a current feedback module. The servo drive mechanism is used to drive the retractable induction coil to adjust its position and retraction state, and the current feedback module collects the current data of the retractable induction coil in real time and transmits it to the central control module.
[0014] As a preferred embodiment of the present invention, the driving component includes a cylinder, a pushing block is fixedly connected to the output shaft end of the cylinder, three long rods are fixedly connected to the top of each pushing block, and a clamping component is movably connected to the top of each of the three long rods.
[0015] As a preferred embodiment of the present invention, the clamping assembly includes a hollow shell, and three support plates are fixedly connected to the outer side of the hollow shell. Two springs are fixedly connected to one end of each of the three support plates.
[0016] As a preferred embodiment of the present invention, each of the six springs has three contraction blocks fixedly connected to its other end, and the bottom grooves of the three contraction blocks are movably connected to the tops of the three long rods, and soft pads are fixedly connected to the inner surface grooves of the three contraction blocks.
[0017] Compared with the prior art, the beneficial effects of the present invention are:
[0018] (1) A high-frequency heating device for bar stock, which forms a stable and flexible clamping mechanism through the synergistic action of the driving component and the clamping component, effectively ensuring heating accuracy. At the same time, the cylinder drives the horizontal movement of the push block and the long rod, which can drive the three shrink blocks to achieve inward shrinking action, and the power transmission is stable and reliable.
[0019] (2) A high-frequency heating device for bar stock, wherein a hollow shell provides a mounting base for a support plate, and springs on the support plate provide buffering and adjustment capabilities for the clamping force, avoiding damage to the bar stock surface caused by rigid clamping. Three shrinkage blocks are symmetrically distributed, and their movable connection with the long rod allows for automatic centering and calibration, ensuring that the bar stock is always in the center position of the induction coil, preventing uneven heating caused by bar stock misalignment.
[0020] (3) A high-frequency heating device for bar stock, which can further protect the surface of the bar stock and enhance the clamping friction through the soft pad on the inner surface of the shrinkage block, effectively suppressing the displacement of the bar stock caused by thermal expansion and contraction during the heating process, and ensuring heating accuracy in all aspects.
[0021] (4) A high-frequency heating device for bar stock, wherein a servo drive mechanism can drive a retractable induction coil to flexibly adjust its position and extension state, adapting to the needs of bars with different diameters and heating lengths, and ensuring that the coupling distance between the coil and the bar stock is always optimal. The current feedback module collects the coil current data in real time and transmits it to the central control module. The system can promptly sense load changes and dynamically adjust the output parameters to avoid uneven heating caused by current fluctuations, ensuring the consistency and stability of the heating process.
[0022] (5) A high-frequency heating device for bar stock, which captures the surface temperature and temperature gradient of the bar stock in real time through a surface infrared thermometer, and can accurately calculate the core temperature by combining the detection data of the core temperature measuring component, so as to achieve comprehensive control of the surface and internal temperature of the bar stock and avoid the problem of insufficient or overheating of the core due to relying solely on surface temperature measurement. At the same time, the dual-frequency power supply module can flexibly switch between high and low frequency power output to adapt to the different process requirements of core heating and surface heating of the bar stock.
[0023] (6) A high-frequency heating device for bar stock, which performs comprehensive detection of surface and internal defects of bar stock through a defect diagnosis unit, achieves accurate screening before the heating process, removes defective bar stock that does not meet the heating requirements from the source, prevents bar stock with potential cracks, inclusions and other defects from flowing into subsequent processing after heating, effectively reduces the defect rate of finished products caused by base material problems, and reduces material and time losses caused by rework and scrap. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the front and side structure of the present invention;
[0025] Figure 2 This is a schematic diagram of the overall fixing component of the present invention;
[0026] Figure 3 This is a schematic diagram of the driving component of the present invention;
[0027] Figure 4 This is a schematic diagram of the internal connection relationship of the clamping component of the present invention.
[0028] In the diagram: 1. Frame; 2. Defect diagnosis unit; 3. Temperature control unit; 31. Surface infrared thermometer; 32. Core temperature measurement component; 33. Dual-frequency power supply module; 4. Heating unit; 41. Retractable induction coil; 42. Servo drive mechanism; 43. Current feedback module; 5. Fixing component; 51. Drive component; 511. Cylinder; 512. Pushing block; 513. Long rod; 52. Clamping component; 521. Hollow shell; 522. Support plate; 523. Spring; 524. Shrink block; 525. Soft pad; 6. Conveying unit; 7. Central control module. Detailed Implementation
[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0030] Example: Please refer to Figure 1 A high-frequency heating device for bar stock includes a frame 1, a defect diagnosis unit 2, a temperature control unit 3, a heating unit 4, a fixing component 5, a conveying unit 6, and a central control module 7. Each unit is electrically connected to the central control module 7 to achieve coordinated control. The defect diagnosis unit 2 is used to detect surface and internal defects of the bar stock and screen bar stock that meets the heating requirements.
[0031] The temperature control unit 3 is used to monitor the temperature of the heating area in real time, feed back temperature data, and adjust heating parameters to maintain the target temperature.
[0032] The heating unit 4 is used to convert the power frequency AC power into high frequency AC power, and generate an alternating magnetic field through the induction coil to generate eddy currents and Joule heat inside the bar stock, thereby achieving rapid heating of the bar stock.
[0033] The fixing component 5 is used to position and clamp the bar stock to ensure that the bar stock is in the center position of the induction coil during the heating process;
[0034] The fixing component 5 includes a driving component 51 and a clamping component 52. The driving component 51 is used to drive the clamping component 52, which is fixedly connected to the top end, to move horizontally, so that the clamping component 52 can retract inward, thereby fitting and fixing the outer surface of the bar material and ensuring the stability of the heating process.
[0035] The conveying unit 6 is used to convey the bar stock to be heated to the clamping area of the fixing component 5, and at the same time convey the heated bar stock to the next process.
[0036] Example 2: Based on Example 1, as follows Figure 2-4 As shown, the temperature control unit 3 includes a surface infrared thermometer 31, a core temperature measuring component 32, and a dual-frequency power supply module 33. The surface infrared thermometer 31 monitors the surface temperature and temperature gradient of the bar stock, and calculates the core temperature by combining the detection data of the core temperature measuring component 32. The dual-frequency power supply module 33 can switch between high and low frequency power output to adapt to the process requirements of core heating and surface heating of the bar stock, respectively.
[0037] The heating unit 4 includes a retractable induction coil 41, a servo drive mechanism 42, and a current feedback module 43. The servo drive mechanism 42 is used to drive the retractable induction coil 41 to adjust its position and retraction state. The current feedback module 43 collects the current data of the retractable induction coil 41 in real time and transmits it to the central control module 7.
[0038] The drive assembly 51 includes a cylinder 511. A pushing block 512 is mounted on the output shaft end of the cylinder 511, and the output shaft end of the cylinder 511 is fixedly connected to the center of the bottom of the pushing block 512. Three long rods 513 are mounted on the top of each pushing block 512, and the top of each pushing block 512 is fixedly connected to the bottom of the three long rods 513. A clamping assembly 52 is mounted on the top of each of the three long rods 513. Through the coordinated action of the drive assembly 51 and the clamping assembly 52, a stable and flexible clamping mechanism is formed, effectively ensuring heating accuracy. Simultaneously, the cylinder 511 drives the pushing block 512 and the long rods 513 to move horizontally, which can push the three contraction blocks 524 to retract inwards, ensuring stable and reliable power transmission. Furthermore, the tops of the three long rods 513 are movably connected to the bottom of the clamping assembly 52.
[0039] The clamping assembly 52 includes a hollow shell 521. Three support plates 522 are provided on the outer side of each hollow shell 521, and the outer side of each hollow shell 521 is fixedly connected to the protruding portions of the three support plates 522. Two springs 523 are provided on the inner surface of each of the three support plates 522. The hollow shell 521 provides a mounting base for the support plates 522, and the springs 523 on the support plates 522 provide a buffering and adjustable clamping force, preventing surface damage to the bar stock caused by rigid clamping. Three shrinkage blocks 524 are symmetrically distributed and, in conjunction with the movable connection design with the long rod 513, can automatically align and calibrate, ensuring that the bar stock is always at the center of the induction coil, preventing uneven heating caused by bar stock misalignment. Furthermore, the inner surface of each of the three support plates 522 is fixedly connected to one end of each of the two springs 523.
[0040] Each of the six springs 523 has three contraction blocks 524 at its other end, and the other end of each spring 523 is fixedly connected to the outside of the three contraction blocks 524. The bottom grooves of the three contraction blocks 524 are movably connected to the tops of the three long rods 513. The soft pads 525 on the inner surface of the contraction blocks 524 further protect the surface of the bar stock and enhance the clamping friction, effectively suppressing displacement of the bar stock due to thermal expansion and contraction during heating, thus ensuring heating accuracy in all aspects. The inner surface grooves of the three contraction blocks 524 are each provided with soft pads 525, and the inner surface grooves of the three contraction blocks 524 are fixedly connected to the outer surface of the soft pads 525.
[0041] The working principle of this invention is as follows:
[0042] First, the conveying unit 6 starts under the command of the central control module 7 and accurately conveys the bar stock to be heated to the detection area of the defect diagnosis unit 2. The defect diagnosis unit 2 immediately performs a comprehensive inspection of the surface and internal defects of the bar stock and converts the inspection results into electrical signals to be fed back to the central control module 7. The central control module 7 analyzes and judges the signals.
[0043] When the bar material to be heated reaches the designated clamping position, the central control module 7 sends a clamping command to the fixing component 5. The cylinder 511 in the drive component 51 receives the signal and starts. Its output shaft drives the push block 512 fixedly connected to it to move horizontally, and pushes the three long rods 513 fixedly connected to the top of the block 512 to move together. Since the top of the three long rods 513 is movably connected to the bottom groove of the shrink block 524 in the clamping component 52, the horizontal movement of the long rods 513 is converted into a force that pushes the shrink block 524 to shrink inward.
[0044] At this time, the springs 523 on the three support plates 522 fixed on the outside of the hollow shell 521 in the clamping assembly 52 are compressed synchronously. The elastic force of the springs 523 causes the shrinkage blocks 524 to generate a stable clamping force, avoiding damage to the surface of the bar material caused by rigid clamping. The three symmetrically distributed shrinkage blocks 524 automatically align and calibrate during movement, ensuring that the bar material is accurately fixed in the center position of the induction coil. At the same time, the soft pads 525 on the inner surface of the shrinkage blocks 524 are tightly attached to the outer surface of the bar material, which further protects the surface of the bar material and enhances the clamping friction, effectively suppressing the displacement of the bar material caused by thermal expansion and contraction during the heating process.
[0045] After the fixed component 5 completes the positioning and clamping of the bar stock, the central control module 7 synchronously starts the heating unit 4 and the temperature control unit 3. The heating unit 4 first converts the input power frequency AC power into high frequency AC power through the internal conversion structure. At the same time, the central control module 7 instructs the servo drive mechanism 42 to drive the retractable induction coil 41 to adjust to the appropriate position and retraction state according to the specifications of the bar stock and the heating process requirements, so that the induction coil and the bar stock maintain the optimal coupling distance. After the high frequency AC power is passed into the retractable induction coil 41, an alternating magnetic field is generated. The alternating magnetic field acts on the bar stock to generate eddy currents inside it. When the eddy currents flow inside the bar stock, Joule heat is generated due to the resistance effect, so as to realize the rapid heating of the bar stock.
[0046] During the heating process, the current feedback module 43 collects the current data of the retractable induction coil 41 in real time and transmits it to the central control module 7. The central control module 7 judges the working status of the heating unit 4 by the current change. If the current is abnormal, it adjusts the output parameters in time to ensure heating stability.
[0047] The temperature control unit 3 works simultaneously with the heating start-up. The surface infrared thermometer 31 monitors the surface temperature and temperature gradient of the bar stock in real time, and the core temperature measuring component 32 directly detects the core temperature of the bar stock. The detection data of both are transmitted to the central control module 7. The system accurately calculates the real-time core temperature of the bar stock by combining the surface temperature gradient and the direct core detection data through a preset algorithm.
[0048] When the temperature control unit 3 detects that the bar stock temperature has reached the process requirements and stabilized for a period of time, the central control module 7 determines that the heating is complete and then instructs the heating unit 4 to stop working. At the same time, it controls the cylinder 511 in the fixing component 5 to reset, pushes the round block 512 to drive the long rod 513 to move in the opposite direction, and the shrink block 524 is released outward under the reset force of the spring 523, releasing the clamp on the bar stock. Finally, the central control module 7 starts the conveying unit 6 to transport the heated bar stock from the fixed area to the next process, realizing continuous high-frequency heating operation of the bar stock.
[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high-frequency heating device for bar stock, comprising a frame (1), a defect diagnosis unit (2), a temperature control unit (3), a heating unit (4), a fixing assembly (5), a conveying unit (6), and a central control module (7), wherein each unit is electrically connected to the central control module (7) to achieve coordinated control, characterized in that: The defect diagnosis unit (2) is used for detecting the surface and internal defects of the bar and screening the bar meeting the heating requirements; The temperature control unit (3) is used for monitoring the temperature of the heating area in real time, feeding back the temperature data and adjusting the heating parameters to maintain the target temperature; The heating unit (4) is used for converting the power frequency alternating current into high frequency alternating current, generating alternating magnetic field through the induction coil, generating eddy current in the bar and generating Joule heat, and realizing rapid heating of the bar; The fixing assembly (5) is used for positioning and clamping the bar to ensure that the bar is in the center position of the induction coil during the heating process; The fixing assembly (5) includes a driving assembly (51) and a clamping assembly (52), the driving assembly (51) is used for driving the clamping assembly (52) fixedly connected at the top to move horizontally, so that the clamping assembly (52) realizes the inward contraction action, thereby fitting and fixing the outer surface of the bar, and ensuring the stability of the heating process; The conveying unit (6) is used for conveying the bar to be heated to the clamping area of the fixing assembly (5), and conveying the heated bar to the next process.
2. A bar high-frequency heating device according to claim 1, characterized in that: The temperature control unit (3) includes a surface layer infrared thermometer (31), a core temperature measuring assembly (32) and a double-frequency power supply module (33).
3. The bar high-frequency heating apparatus according to claim 1, characterized by: The heating unit (4) includes a telescopic induction coil (41), a servo drive mechanism (42) and a current feedback module (43).
4. The bar high-frequency heating apparatus according to claim 1, characterized by: The driving assembly (51) includes a cylinder (511), the output shaft end of the cylinder (511) is fixedly connected with a pushing circular block (512), the top of the pushing circular block (512) is fixedly connected with three long rods (513), and the top of each of the three long rods (513) is movably connected with a clamping assembly (52).
5. A bar high-frequency heating apparatus according to claim 4, characterized in that: The clamping assembly (52) includes a hollow shell (521), the outer side of the hollow shell (521) is fixedly connected with three supporting plates (522), and the inner surface of each of the three supporting plates (522) is fixedly connected with two springs (523) at one end.
6. A bar high-frequency heating apparatus according to claim 5, characterized by: The other end of each of the six springs (523) is fixedly connected with three contraction blocks (524), and the bottom recesses of the three contraction blocks (524) are movably connected with the top of each of the three long rods (513), and the inner surface recesses of the three contraction blocks (524) are fixedly connected with soft pads (525).