Spring wire heating and setting device

Abstract

The utility model discloses a spring steel wire heating setting device relates to spring processing equipment technical field, and this utility model discloses a support, and the lateral wall of support is inserted and is rotatably connected with transmission roll, and the lateral wall of transmission roll can transmit and be equipped with metal conveying mesh belt, and the lateral wall of metal conveying mesh belt is equipped with heating box, and one side of heating box is provided with the feed port of penetrating, and the other side of heating box is provided with the discharge port of penetrating, and the feed port is corresponding with the discharge port, and the end face of feed port and discharge port all is equipped with heat insulation curtain, and the inside of heating box is provided with preheating area, high temperature setting area and cooling area to the direction of feed port to the discharge port, and preheating area includes infrared heating pipe, and high temperature setting area includes induction heating coil, and cooling area includes cooling fan, the utility model discloses can carry out the continuous production to improve the efficiency, can effectively eliminate internal stress, avoid uneven heating, and the fatigue life of spring and product consistency have been improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of spring processing equipment technology, specifically a heating and shaping device for spring steel wire. Background Technology

[0002] In the spring manufacturing process, after the steel wire is cold-rolled into a preset shape by a winding machine, there will be significant work hardening and internal stress inside, resulting in poor dimensional stability and fatigue resistance of the spring. In order to eliminate these internal stresses generated by winding, stabilize the spring dimensions, and give it final toughness, the formed spring must be subjected to low-temperature stress-relieving tempering, also known as shaping tempering. Currently, the common method is to collect the wound springs into a basket and then send them in batches into a large box-type or pit-type tempering furnace for long-term heating. This method has the following obvious disadvantages: first, low production efficiency: batch processing leads to a slow production cycle and cannot form a continuous operation with the winding machine; second, uneven heating: the springs stacked together are heated unevenly, which can easily lead to poor shaping effect of some springs, resulting in soft spots or uneven hardness, affecting the consistency of product quality. To address the above problems, the inventor proposes a spring steel wire heating and shaping device to solve the above problems. Utility Model Content

[0003] In order to solve the problems of low production efficiency and uneven heating in the current process of heating and shaping spring steel wire, the purpose of this utility model is to provide a heating and shaping device for spring steel wire.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a spring steel wire heating and shaping device, including a bracket, a transmission roller rotatably connected to the side wall of the bracket, a metal conveyor belt being provided on the side wall of the transmission roller, a heating box being fitted on the side wall of the metal conveyor belt, a feed inlet being provided through one side of the heating box, and a discharge outlet being provided through the other side of the heating box, the feed inlet and the discharge outlet corresponding to each other, and heat insulation curtains being provided on the end faces of both the feed inlet and the discharge outlet, the interior of the heating box being provided with a preheating zone, a high-temperature shaping zone and a cooling zone from the feed inlet to the discharge outlet, the preheating zone including an infrared heating tube, the high-temperature shaping zone including an induction heating coil, and the cooling zone including a cooling fan.

[0005] Preferably, there are two supports, located on opposite sides of the heating chamber. One support has a driver on one side, with its output shaft fixedly connected to the roller shaft of a transmission roller. A spring coiling machine and a raw material conveyor are located on one side of the heating chamber. The raw material conveyor carries steel bars required for spring processing. The spring coiling machine coils the raw material into springs. After processing, the springs can be placed on a metal conveyor belt by an external robotic arm or manually by workers. The metal conveyor belt continuously transports the processed springs, seamlessly connecting with the preceding winding process to form an automated production line. This improves production efficiency. The drive housing is fixed to the side wall of the support. Starting the drive can make the transmission roller rotate, which in turn can make the metal conveyor belt move. The metal conveyor belt is made of heat-resistant stainless steel, such as SUS314 and SUS310Sm. These materials contain high chromium and nickel content and can form a dense chromium oxide protective film on the surface at high temperatures, such as continuous working temperatures of 900℃-1100℃ or higher. This gives it excellent high-temperature oxidation resistance and creep resistance. The temperature required for spring tempering and shaping is usually between 200-450℃. Therefore, when springs are transported by the metal conveyor belt, it can fully withstand the temperature required for spring tempering and shaping.

[0006] Preferably, a base is fixedly connected to the bottom of the heating box, and the interior of the heating box is filled with ceramic fiber insulation cotton. The base supports the heating box, and the ceramic fiber insulation cotton provides insulation. The heat insulation curtain can be made of high-temperature resistant glass fiber to reduce heat loss. A frame is provided on the side wall of the infrared heating tube, and the frame is fixedly connected to the inner wall of the heating box. The upper metal conveyor belt passes through the coil opening of the induction heating coil. When the spring is conveyed by the metal conveyor belt, the spring first enters the preheating zone. The infrared heating tube in the preheating zone can preheat the spring at a low temperature to slowly raise its temperature, thus preparing it for subsequent high-temperature heating. Then, the spring enters the high-temperature shaping zone. An induction heating coil wound with hollow copper tubes is set in the high-temperature shaping zone. After being energized, it can generate a high-frequency alternating magnetic field, causing the metal spring itself to... The rapid generation of eddy currents generates heat, allowing the spring core to reach the required tempering temperature in a short time for high-temperature shaping. Circulating cooling water inside the coil prevents overheating. A mounting bracket is installed on the side wall of the cooling fan, extending through the heating chamber and fixedly connected to it. A protective net is installed on the top surface of the cooling fan. After high-temperature shaping, the spring enters the cooling zone, where cooling air is blown onto it by the cooling fan, cooling it at a suitable speed, thus completing the shaping process. An external control system is installed in the heating chamber, using a PLC to centrally control the speed of the driver, precisely controlling the spring's residence time within the heating chamber. Simultaneously, independent temperature controllers can be used to control the power of the infrared heating tube and the induction heating coil, maintaining the preheating and high-temperature zones at the set values ​​required by the process.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: it enables continuous production to improve efficiency. The continuous conveying of springs can be achieved through the metal conveyor belt, which can be seamlessly connected with the previous winding process to form an automated production line, thereby improving production efficiency. Furthermore, the partitioned design of preheating, high-temperature shaping and cooling, combined with the use of heat insulation cotton and heat insulation curtains, can reduce heat loss and enable the springs to reach the predetermined temperature uniformly and rapidly in a very short time, avoiding stacking and heating, effectively eliminating internal stress, avoiding uneven heating, and significantly improving the fatigue life of the springs and product consistency. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0010] Figure 2 This is a schematic diagram showing the combination of the heating box and the metal conveyor belt of this utility model.

[0011] Figure 3 This is a schematic diagram of the internal structure of the heating box of this utility model.

[0012] In the diagram: 1. Spring coiling machine; 2. Raw material conveyor; 3. Raw material; 4. Support frame; 5. Transmission roller; 6. Driver; 7. Metal conveyor belt; 8. Heating box; 9. Base; 10. Feed inlet; 11. Discharge outlet; 12. Heat insulation curtain; 13. Frame; 14. Infrared heating tube; 15. Induction heating coil; 16. Mounting bracket; 17. Cooling fan; 18. Protective net; 19. Control system. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Example: Figure 1-3 As shown, this utility model provides a heating and shaping device for spring steel wire, including a support 4. A transmission roller 5 is rotatably connected to the side wall of the support 4. A metal conveyor belt 7 is provided on the side wall of the transmission roller 5. A heating box 8 is sleeved on the side wall of the metal conveyor belt 7. A feed inlet 10 is provided through one side of the heating box 8, and a discharge outlet 11 is provided through the other side of the heating box 8. The feed inlet 10 and the discharge outlet 11 correspond to each other, and heat insulation curtains 12 are provided on the end faces of both the feed inlet 10 and the discharge outlet 11. The interior of the heating box 8 is provided with a preheating zone, a high-temperature shaping zone and a cooling zone from the feed inlet 10 to the discharge outlet 11. The preheating zone includes an infrared heating tube 14, the high-temperature shaping zone includes an induction heating coil 15, and the cooling zone includes a cooling fan 17.

[0015] There are two brackets 4, and the two brackets 4 are located on both sides of the heating box 8. One of the brackets 4 is equipped with a driver 6 on one side, and the output shaft end of the driver 6 is fixedly connected to the roller shaft of the transmission roller 5.

[0016] By adopting the above technical solution, a spring coiling machine 1 and a raw material conveyor 2 are installed on one side of the heating box 8. The raw material conveyor 2 carries raw material 3, which is a steel rod required for processing springs. The raw material 3 is coiled into a spring by the spring coiling machine 1. After the spring processing is completed, the processed spring can be placed on the metal conveyor belt 7 by an external robotic arm or by manual operation by the staff. The metal conveyor belt 7 continuously transports the processed spring, thus seamlessly connecting with the previous winding process to form an automated production line, improving production efficiency. The housing of the drive 6 is fixed to the side wall of the bracket 4. The drive is started. The actuator 6 can rotate the transmission roller 5, which in turn can move the metal conveyor belt 7. The metal conveyor belt 7 is made of heat-resistant stainless steel, such as SUS314 and SUS310Sm. These materials contain high levels of chromium and nickel, and can form a dense chromium oxide protective film on the surface at high temperatures, such as continuous working temperatures of 900℃-1100℃ or higher. This results in excellent high-temperature oxidation resistance and creep resistance. The temperature required for spring tempering and shaping is usually between 200-450℃. Therefore, when springs are transported by the metal conveyor belt 7, it can fully withstand the temperature required for spring tempering and shaping.

[0017] The bottom of the heating box 8 is fixedly connected to the base 9, and the interior of the heating box 8 is filled with ceramic fiber insulation cotton.

[0018] By adopting the above technical solution, the base 9 is used to support the heating box 8, the ceramic fiber insulation cotton can play a role in heat preservation, and the heat insulation curtain 12 can be made of high temperature resistant glass fiber to reduce heat loss.

[0019] The infrared heating tube 14 has a frame 13 on its side wall, which is fixedly connected to the inner wall of the heating box 8. The upper metal conveyor belt 7 passes through the coil opening of the induction heating coil 15.

[0020] By adopting the above technical solution, when the spring is transported by the metal conveyor belt 7, the spring first enters the preheating zone. The infrared heating tube 14 in the preheating zone can preheat the spring at a low temperature to slowly raise the temperature, thus preparing for subsequent high-temperature heating. Then, the spring enters the high-temperature shaping zone. A set of induction heating coils 15 made of hollow copper tubes is set in the high-temperature shaping zone. After being energized, a high-frequency alternating magnetic field can be generated, which can cause the metal spring to generate eddy currents and heat up quickly. The spring core can reach the required tempering temperature in a short time for high-temperature shaping. The coil is also equipped with circulating cooling water to prevent overheating.

[0021] The side wall of the cooling fan 17 is provided with a mounting bracket 16, which extends through the heating box 8 and is fixedly connected to the side wall of the mounting bracket 16. The top surface of the cooling fan 17 is provided with a protective net 18.

[0022] By adopting the above technical solution, after the spring has been shaped at high temperature, it can enter the cooling zone. The cooling fan 17 in the cooling zone can blow cooling air onto the spring, so that it is cooled at an appropriate speed, thereby completing the entire shaping process.

[0023] The heating box 8 is equipped with a control system 19 on its exterior.

[0024] By adopting the above technical solution, the control system 19 uses a PLC to centrally control the rotation speed of the driver 6, thereby accurately controlling the dwell time of the spring in the heating box 8. At the same time, an independent temperature controller can be used to control the power of the infrared heating tube 14 and the power of the induction heating coil 15 respectively, so that the temperature of the preheating zone and the high temperature zone is maintained at the set value required by the process.

[0025] Working principle: When using this utility model, after the spring is processed, the processed spring can be placed on the metal conveyor belt 7 by an external robotic arm or by the operator. The driver 6 is started to make the transmission roller 5 rotate, which in turn makes the metal conveyor belt 7 move. The processed spring is continuously transported through the metal conveyor belt 7, which can be seamlessly connected with the previous winding process to form an automated production line and improve production efficiency. When the spring is conveyed by the metal conveyor belt 7, the spring first enters the preheating zone. The infrared heating tube 14 in the preheating zone can preheat the spring at a low temperature to slowly raise the temperature, thus preparing for the subsequent high temperature heating. Then, the spring enters the high temperature setting zone. A set of induction heating coils 15 made of hollow copper tubes is set in the high temperature setting zone. After being energized, the coils can generate a high frequency alternating magnetic field, which can cause the metal spring to generate eddy currents and heat up quickly. The spring core can reach the required tempering temperature in a short time for high temperature setting. The coil is also equipped with circulating cooling water to prevent overheating. Next, after the spring has been shaped at high temperature, it can enter the cooling zone. Cooling air can be blown onto the spring by the cooling fan 17 in the cooling zone to cool it at an appropriate speed, thereby completing the entire shaping process. The metal conveyor belt 7 is made of heat-resistant stainless steel, such as SUS314 and SUS310Sm. These materials contain high levels of chromium and nickel, and can form a dense chromium oxide protective film on the surface at high temperatures, such as continuous working temperatures of 900℃-1100℃ or higher. This results in excellent high-temperature oxidation resistance and creep resistance. The temperature required for spring tempering and shaping is usually between 200-450℃. Therefore, the metal conveyor belt 7 can fully withstand the temperature required for spring tempering and shaping when transporting springs.

[0026] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0027] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A heating and shaping device for spring steel wire, comprising a support (4), characterized in that: The side wall of the bracket (4) is rotatably connected to a transmission roller (5). The side wall of the transmission roller (5) is equipped with a metal conveyor belt (7). The side wall of the metal conveyor belt (7) is fitted with a heating box (8). One side of the heating box (8) is provided with a feed inlet (10), and the other side of the heating box (8) is provided with a discharge outlet (11). The feed inlet (10) and the discharge outlet (11) are opposite to each other. The end faces of the feed inlet (10) and the discharge outlet (11) are provided with heat insulation curtains (12). The interior of the heating box (8) is provided with a preheating zone, a high-temperature shaping zone and a cooling zone from the feed inlet (10) to the discharge outlet (11). The preheating zone includes an infrared heating tube (14), the high-temperature shaping zone includes an induction heating coil (15), and the cooling zone includes a cooling fan (17).

2. The spring steel wire heating and shaping device as described in claim 1, characterized in that, There are two brackets (4), and the two brackets (4) are located on both sides of the heating box (8).

3. The spring steel wire heating and shaping device as described in claim 2, characterized in that, One of the brackets (4) is provided with a driver (6) on one side, and the output shaft end of the driver (6) is fixedly connected to the roller shaft of the transmission roller (5).

4. The spring steel wire heating and shaping device as described in claim 1, characterized in that, The bottom surface of the heating box (8) is fixedly connected to a base (9), and the interior of the heating box (8) is filled with ceramic fiber insulation cotton.

5. The spring steel wire heating and shaping device as described in claim 1, characterized in that, The infrared heating tube (14) has a frame (13) on its side wall, and the frame (13) is fixedly connected to the inner wall of the heating box (8).

6. The spring steel wire heating and shaping device as described in claim 1, characterized in that, The metal conveyor belt (7) located on the upper layer passes through the coil opening of the induction heating coil (15).

7. The spring steel wire heating and shaping device as described in claim 1, characterized in that, The side wall of the cooling fan (17) is provided with a mounting bracket (16), which passes through the heating box (8) and is fixedly connected to the heating box (8). The top surface of the cooling fan (17) is provided with a protective net (18).

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