A temperature control device and system for a quenching furnace used in leaf spring processing

Abstract

This invention relates to the technical field of experimental equipment before leaf spring production, specifically a temperature control device and system for a leaf spring processing quenching furnace. The system includes a furnace body, a mounting rod, a first temperature measuring module, and a voltage detection module. The furnace body is fixedly mounted on a base support. A sealing cover is rotatably mounted on the front end of the furnace body, and a mounting hole is provided on the rear side of the furnace body. A PLC control module is fixedly mounted on the front end face of the base support. The mounting rod is fixedly installed in the mounting hole, and has primary and secondary wiring holes. By configuring the first temperature measuring module as a combination of a heat-conducting plate, a positioning cover, a positive contact wire, and a negative contact wire, and by providing a threaded seat and a force-bearing seat on the end face of the heat-conducting plate, the positioning cover is screwed onto the threaded seat, thereby forming a synchronous positioning connection between the positive and negative contact wires. Compared to traditional welding connections, this method offers superior stability, thus improving the operational stability of the first temperature measuring module.

Description

Technical Field

[0001] This invention relates to the technical field of experimental equipment before leaf spring production, specifically a temperature control device and system for a leaf spring processing quenching furnace. Background Technology

[0002] Leaf spring is short for steel leaf spring. It is a leaf spring composed of at least one spring steel leaf. In the vehicle suspension system, it mainly plays the roles of load bearing, shock absorption and shock absorption, and force transmission and guidance. After heat treatment, the spring steel can obtain a tempered troostite structure, which can achieve higher mechanical properties and better realize the above functions. A Chinese patent document with publication number CN112981060A discloses a temperature-controlled quenching furnace, which includes a coal furnace. A quenching agent storage box is provided on one side of the coal furnace. The quenching agent storage box is equipped with a lifting quenching device for immersing a leaf spring in the quenching agent. A circular flue is fixedly provided on one side of the quenching agent storage box. A condensing device for condensing the steam generated during quenching is provided in the circular flue. A filter channel is fixedly provided between the coal furnace and the circular flue. A filter channel is provided in the filter channel for filtering the smoke and dust in the air drawn in from the coal furnace. Opening and closing devices for connecting and closing the filter channel are provided on both sides of the filter channel. An exhaust power device for creating airflow inside the equipment is provided on one side of the circular flue. However, the above solution measures the ambient temperature inside the furnace. In the actual quenching process, there is a certain difference between the internal temperature of the leaf spring and the air temperature inside the furnace, which leads to a large error in the actual quenching temperature. This affects the actual quenching effect of the leaf spring and thus has a certain impact on the product quality. Therefore, this invention proposes a temperature control device and system for leaf spring processing quenching furnace to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a temperature control device and system for a quenching furnace used in leaf spring processing, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a temperature control device for a leaf spring processing quenching furnace, comprising: The furnace body is fixedly mounted on the base bracket. A sealing cover is rotatably mounted on the front end of the furnace body. An installation hole is opened on the rear side of the furnace body. A PLC control module is fixedly mounted on the front end of the base bracket. The mounting rod is fixedly installed in the mounting hole, and the mounting rod is provided with a primary wiring hole and a secondary wiring hole, wherein a positive wire and a negative wire are respectively provided in the primary wiring hole and the secondary wiring hole; The first temperature measuring module is fixedly installed on the inner end of the mounting rod, and the positive and negative wires are electrically connected to the positive and negative terminals of the first temperature measuring module, respectively. The voltage detection module is fixedly mounted on the connecting bracket at the rear end of the base bracket, and the voltage detection module is electrically connected to the PLC control module on the base bracket. The second temperature measurement module is used to measure the internal temperature of the leaf spring.

[0005] Preferably, the edge of the sealing cap has a snap-fit ​​opening, and an installation ring is integrally formed at the front edge of the furnace body. A snap-fit ​​structure is installed on the installation ring, and the snap-fit ​​structure is correspondingly set with the snap-fit ​​opening. Preferably, the leaf spring has a temperature measuring hole, which is a blind hole, and the depth of the temperature measuring hole is less than two-thirds of the thickness of the leaf spring. The detection probe on the second temperature measuring module is electrically connected to the temperature monitoring module on the base bracket via a signal line. The size of the detection probe matches the size of the temperature measuring hole, and the detection probe is an S-type thermocouple.

[0006] Preferably, the first temperature measuring module includes a heat-conducting plate, a positioning cover, a positive electrode contact wire, and a negative electrode contact wire. The heat-conducting plate is fixedly connected to the front end of the mounting rod, and the end face of the heat-conducting plate is integrally formed with a threaded seat and a force-bearing seat.

[0007] Preferably, the rear end of the positioning cover is threaded onto a threaded seat, and the front end of the positioning cover is funnel-shaped. The positioning cover has a three-level wiring groove and a four-level wiring groove.

[0008] Preferably, the force-bearing seat is shaped like a frustum, and a primary force-bearing groove and a secondary force-bearing groove are provided on the side wall of the force-bearing seat. The primary force-bearing groove is connected to the tertiary wiring groove, and the secondary force-bearing groove is connected to the quaternary wiring groove.

[0009] Preferably, the positive electrode wire is arranged in a primary wiring hole, the negative electrode wire is arranged in a secondary wiring hole, the positive electrode contact wire is electrically connected to the positive electrode wire, the negative electrode contact wire is electrically connected to the negative electrode wire, the positive electrode contact wire is arranged in a primary force-bearing groove, and the negative electrode contact wire is arranged in a secondary force-bearing groove.

[0010] Preferably, when the positioning cover is actually tightened onto the threaded seat, the positive and negative contact wires are pressed together in the primary and secondary force grooves, and at this time, the ends of the positive and negative contact wires are squeezed together.

[0011] Preferably, the mounting rod is made of heat-insulating material, and the mounting rod is specifically made of porous alumina casting. The positive electrode contact wire is a nickel-silicon wire, and the negative electrode contact wire is a nickel-chromium-silicon wire.

[0012] Preferably, the heat-conducting plate, positioning cover, and force-bearing seat are all made of thermally conductive and insulating materials, and are all cast from aluminum nitride material.

[0013] A temperature control system for a leaf spring processing quenching furnace is provided. The temperature control system is used to control the temperature control device of the leaf spring processing quenching furnace. When the furnace temperature rises, the contact point of the positive and negative contact wires experiences a temperature rise. Due to the different materials of the positive and negative contact wires, the electron beams flowing to the positive and negative contact wires differ due to the temperature difference. This difference is detected by the voltage detection module, thereby enabling temperature monitoring.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting up a temperature control device for a leaf spring processing quenching furnace, which consists of a furnace body, a mounting rod, a first temperature measuring module, and a voltage detection module, and setting the first temperature measuring module to consist of a heat-conducting plate, a positioning cover, a positive contact wire, and a negative contact wire, and setting a threaded seat and a force-bearing seat on the end face of the heat-conducting plate, the positioning cover is screwed onto the threaded seat, thereby forming a synchronous positioning connection between the positive and negative contact wires. Compared with the traditional welding connection method, this method has better stability, thereby improving the operational stability of the first temperature measuring module. 2. By opening a temperature measuring hole on the leaf spring and measuring the temperature of the middle sidewall of the measuring hole through the detection probe on the second temperature measuring module, the internal temperature of the leaf spring can be accurately measured, thereby controlling the quenching temperature of the leaf spring more accurately and ensuring the quenching effect. In addition, the first temperature measuring module can measure the air temperature inside the furnace. By comparing the measurement data of the first temperature measuring module and the second temperature measuring module, the linear relationship between the air temperature inside the furnace and the internal temperature of the workpiece can be analyzed, which helps to better control the actual quenching temperature of the workpiece in later actual production. 3. By casting the heat-conducting plate, positioning cover, and force-bearing seat all using thermally conductive and insulating materials, the positive and negative contact wires can be heated more stably through the heat conduction effect of the heat-conducting plate, positioning cover, and force-bearing seat, thereby improving the overall operational stability of the first temperature measurement module. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 3This is a half-sectional view of the present invention; Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point E in the middle; Figure 5 This is a half-sectional view of the mounting rod of the present invention; Figure 6 for Figure 5 Enlarged schematic diagram of the structure at point B; Figure 7 This is a schematic diagram of the heat-conducting plate structure of the present invention; Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point C; Figure 9 This is a half-sectional view of the heat-conducting plate of the present invention; Figure 10 for Figure 9 Enlarged schematic diagram of the structure at point D.

[0016] In the diagram: 1. Furnace body; 2. Mounting rod; 3. First temperature measurement module; 4. Voltage detection module; 5. Base bracket; 6. Sealing cover; 7. PLC control module; 8. Connecting bracket; 9. Heat-conducting plate; 10. Positioning cover; 11. Positive contact wire; 12. Negative contact wire; 13. Positive wire; 14. Negative wire; 15. Threaded seat; 16. Force-bearing seat; 20. Clamping joint; 21. Mounting ring; 22. Buckle structure; 23. Three-level wiring channel; 24. Four-level wiring channel; 25. First-level force-bearing channel; 26. Second-level force-bearing channel; 27. Signal line; 28. Detection probe; 29. ​​Temperature monitoring module; 30. Leaf spring. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit 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.

[0018] Please see Figures 1-10 The present invention provides the following three preferred embodiments: Example 1: A temperature control device for a leaf spring quenching furnace includes a furnace body 1, a mounting rod 2, a first temperature measuring module 3, and a voltage detection module 4. The furnace body 1 is fixedly mounted on a base bracket 5. A sealing cover 6 is rotatably mounted on the front end of the furnace body 1. A mounting hole is opened on the rear side of the furnace body 1. A PLC control module 7 is fixedly mounted on the front end of the base bracket 5. The mounting rod 2 is fixedly mounted in the mounting hole, and a primary wiring hole and a secondary wiring hole are opened on the mounting rod 2. A positive wire 13 and a negative wire 14 are respectively arranged in the primary wiring hole and the secondary wiring hole. The first temperature measuring module 3 is fixedly mounted on the inner end of the mounting rod 2. The positive wire 13 and the negative wire 14 are electrically connected to the positive and negative terminals of the first temperature measuring module 3, respectively. A connecting bracket 8 is fixedly mounted on the rear end of the base bracket 5. The voltage detection module 4 is fixedly mounted on the connecting bracket 8, and the voltage detection module 4 is electrically connected to the PLC control module 7 on the base bracket 5. The second temperature measuring module is used to measure the internal temperature of the leaf spring 30.

[0019] The sealing cover 6 has a locking opening 20 on its edge. An installation ring 21 is integrally formed at the front edge of the furnace body 1. A buckle structure 22 is installed on the installation ring 21. The buckle structure 22 is set in correspondence with the locking opening 20 to improve the convenience of closing the sealing cover 6. A temperature measuring hole is provided on the leaf spring 30. The temperature measuring hole is a blind hole, and its depth is less than two-thirds of the thickness of the leaf spring 30. The detection probe 28 on the second temperature measuring module is electrically connected to the temperature monitoring module 29 on the base bracket 5 via the signal line 27. The size of the detection probe 28 matches the size of the temperature measuring hole, and the detection probe 28 is an S-type thermocouple. By providing a temperature measuring hole on the leaf spring 30 and measuring the temperature of the middle sidewall of the temperature measuring hole through the detection probe 28 on the second temperature measuring module, the internal temperature of the leaf spring 30 can be accurately measured, thereby more accurately controlling the quenching temperature of the leaf spring 30 and ensuring the quenching effect. In addition, the first temperature measuring module can measure the air temperature inside the furnace. By comparing the measurement data of the first and second temperature measuring modules, the linear relationship between the air temperature inside the furnace and the internal temperature of the workpiece can be analyzed, which helps to better control the actual quenching temperature of the workpiece in later actual production.

[0020] The first temperature measuring module 3 includes a heat-conducting plate 9, a positioning cover 10, a positive electrode contact wire 11 and a negative electrode contact wire 12. The heat-conducting plate 9 is fixedly connected to the front end of the mounting rod 2, and the end face of the heat-conducting plate 9 is integrally formed with a threaded seat 15 and a force-bearing seat 16.

[0021] The rear end of the positioning cover 10 is threaded onto the threaded seat 15, and the front end of the positioning cover 10 is funnel-shaped. The positioning cover 10 has a three-level wiring groove 23 and a four-level wiring groove 24. The force-bearing seat 16 is frustum-shaped, and the side wall of the force-bearing seat 16 has a first-level force-bearing groove 25 and a second-level force-bearing groove 26. The first-level force-bearing groove 25 is connected to the third-level wiring groove 23, and the second-level force-bearing groove 26 is connected to the fourth-level wiring groove 24. The positive wire 13 is arranged in the first-level wiring hole, and the negative wire 14 is arranged in the second-level wiring hole. The positive contact wire 11 is electrically connected to the positive wire 13, and the negative contact wire 12 is electrically connected to the negative wire 14. The positive contact wire 11 is arranged in the first-level force-bearing groove 25, and the negative contact wire 12 is arranged in the second-level force-bearing groove 26.

[0022] When the positioning cover 10 is actually tightened onto the threaded seat 15, the positive contact wire 11 and the negative contact wire 12 are pressed together in the primary force groove 25 and the secondary force groove 26. At this time, the ends of the positive contact wire 11 and the negative contact wire 12 are squeezed together. By setting up a temperature control device for a leaf spring processing quenching furnace composed of a furnace body 1, a mounting rod 2, a first temperature measuring module 3 and a voltage detection module 4, and setting the first temperature measuring module 3 to be composed of a heat-conducting plate 9, a positioning cover 10, a positive contact wire 11 and a negative contact wire 12, and setting a threaded seat 15 and a force seat 16 on the end face of the heat-conducting plate 9, the positioning cover 10 is screwed onto the threaded seat 15, thereby forming a synchronous positioning connection between the positive contact wire 11 and the negative contact wire 12. Compared with the traditional welding connection method, this method has better stability, thereby improving the operational stability of the first temperature measuring module 3.

[0023] In Example 2, based on Example 1, the mounting rod 2 is made of heat-insulating material and is specifically made of porous alumina casting. The positive electrode contact line 11 is a nickel-silicon wire and the negative electrode contact line 12 is a nickel-chromium-silicon wire. By casting the heat-conducting plate 9, the positioning cover 10, and the force-bearing seat 16 all using heat-conducting and insulating materials, the heat conduction effect of the heat-conducting plate 9, the positioning cover 10, and the force-bearing seat 16 allows the positive electrode contact line 11 and the negative electrode contact line 12 to be heated more stably, thereby improving the overall operational stability of the first temperature measuring module 3.

[0024] The heat-conducting plate 9, the positioning cover 10, and the force-bearing seat 16 are all made of thermally conductive and insulating materials, and are all cast from aluminum nitride material.

[0025] Example 3, based on Example 2, provides a temperature control system for a leaf spring processing quenching furnace. This system controls the temperature control device of the aforementioned leaf spring processing quenching furnace. When the furnace body 1 temperature rises, the contact points of the positive electrode contact line 11 and the negative electrode contact line 12 experience a temperature increase. Due to the different materials of the positive electrode contact line 11 and the negative electrode contact line 12, the electron beam flowing to the positive electrode contact line 11 and the negative electrode contact line 12 exhibits a temperature difference, thereby allowing the voltage detection module 4 to detect the voltage difference and thus achieve temperature monitoring.

[0026] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A temperature control device for a quenching furnace in leaf spring processing, characterized in that: include: Furnace body (1), the furnace body (1) is fixedly installed on the base bracket (5), the front end of the furnace body (1) is rotatably installed with a sealing cover (6), the rear side of the furnace body (1) is provided with an installation hole, and the front end of the base bracket (5) is fixedly installed with a PLC control module (7). Mounting rod (2), which is fixedly installed in mounting hole, and a primary wiring hole and a secondary wiring hole are provided on mounting rod (2), and a positive wire (13) and a negative wire (14) are respectively provided in the primary wiring hole and the secondary wiring hole. The first temperature measuring module (3) is fixedly installed on the inner end of the mounting rod (2), and the positive electrode wire (13) and the negative electrode wire (14) are electrically connected to the positive and negative electrodes of the first temperature measuring module (3) respectively. The voltage detection module (4) is fixedly mounted on the rear end of the base bracket (5) with a connecting bracket (8). The voltage detection module (4) is fixedly mounted on the connecting bracket (8), and the voltage detection module (4) is electrically connected to the PLC control module (7) on the base bracket (5). The second temperature measurement module is used to measure the internal temperature of the leaf spring (30).

2. The temperature control device for a leaf spring processing quenching furnace according to claim 1, characterized in that: The sealing cap (6) has a snap-fit ​​opening (20) on its edge. An installation ring (21) is integrally formed at the front edge of the furnace body (1). A snap-fit ​​structure (22) is installed on the installation ring (21). The snap-fit ​​structure (22) is set in correspondence with the snap-fit ​​opening (20).

3. The temperature control device for a leaf spring processing quenching furnace according to claim 1, characterized in that: A temperature measuring hole is provided on the leaf spring (30). The temperature measuring hole is a blind hole, and the depth of the temperature measuring hole is less than two-thirds of the thickness of the leaf spring (30). The detection probe (28) on the second temperature measuring module is electrically connected to the temperature monitoring module (29) on the base bracket (5) through the signal line (27). The size of the detection probe (28) matches the size of the temperature measuring hole, and the detection probe (28) is an S-type thermocouple.

4. The temperature control device for a leaf spring processing quenching furnace according to claim 3, characterized in that: The first temperature measuring module (3) includes a heat-conducting plate (9), a positioning cover (10), a positive electrode contact wire (11), and a negative electrode contact wire (12). The heat-conducting plate (9) is fixedly connected to the front end of the mounting rod (2), and the end face of the heat-conducting plate (9) is integrally formed with a threaded seat (15) and a force-bearing seat (16). The rear end of the positioning cover (10) is threadedly connected to the threaded seat (15), and the front end of the positioning cover (10) is funnel-shaped. The positioning cover (10) is provided with a three-level wiring groove (23) and a four-level wiring groove (24).

5. The temperature control device for a leaf spring processing quenching furnace according to claim 4, characterized in that: The force-bearing seat (16) is shaped like a frustum, and a first-level force-bearing groove (25) and a second-level force-bearing groove (26) are provided on the side wall of the force-bearing seat (16). The first-level force-bearing groove (25) is connected to the third-level wiring groove (23), and the second-level force-bearing groove (26) is connected to the fourth-level wiring groove (24).

6. The temperature control device for a leaf spring processing quenching furnace according to claim 5, characterized in that: The positive electrode wire (13) is arranged in the primary wiring hole, the negative electrode wire (14) is arranged in the secondary wiring hole, the positive electrode contact wire (11) is electrically connected to the positive electrode wire (13), the negative electrode contact wire (12) is electrically connected to the negative electrode wire (14), the positive electrode contact wire (11) is arranged in the primary force groove (25), and the negative electrode contact wire (12) is arranged in the secondary force groove (26).

7. The temperature control device for a leaf spring processing quenching furnace according to claim 6, characterized in that: When the positioning cover (10) is actually tightened on the threaded seat (15), the positive contact wire (11) and the negative contact wire (12) are pressed together in the first-level force groove (25) and the second-level force groove (26), and at this time, the ends of the positive contact wire (11) and the negative contact wire (12) are squeezed together.

8. The temperature control device for a leaf spring processing quenching furnace according to claim 7, characterized in that: The mounting rod (2) is made of heat-insulating material, and the mounting rod (2) is specifically made of porous alumina casting. The positive electrode contact line (11) is a nickel-silicon wire, and the negative electrode contact line (12) is a nickel-chromium-silicon wire.

9. The temperature control device for a leaf spring processing quenching furnace according to claim 8, characterized in that: The heat-conducting plate (9), positioning cover (10), and force-bearing seat (16) are all made of thermally conductive and insulating materials, and the heat-conducting plate (9), positioning cover (10), and force-bearing seat (16) are all cast from aluminum nitride material.

10. A temperature control system for a quenching furnace used in leaf spring processing, characterized in that: The temperature control system of the leaf spring processing quenching furnace is used to control the temperature control device of any one of the leaf spring processing quenching furnaces in claims 1-9. When the temperature of the furnace body (1) rises, the temperature rises at the contact point of the positive contact line (11) and the negative contact line (12). Since the materials of the positive contact line (11) and the negative contact line (12) are different, the electron beam flowing to the positive contact line (11) and the negative contact line (12) will have a difference due to the temperature difference, so that the voltage detection module (4) can detect the voltage difference, thereby realizing the monitoring of temperature.

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