A softening device for spring wire

Abstract

The utility model relates to a kind of softening device for spring steel wire, including heating device, the entrance and exit of heating device is equipped with quenching device and conveying device respectively, coil heating component includes coaxially arranged induction heating coil and supersaturated steam pipe, supersaturated steam pipe connects supersaturated steam generating device, supersaturated steam pipe is nested in the inside of induction heating coil to make both form internal hollow reaction chamber, the opening for spring steel wire to enter and exit is opened in the both ends of reaction chamber, the utility model is to, provide a kind of softening device capable of heating uniformly to each surface of spring steel wire, to solve the technical problem that the surface softening treatment device of existing spring steel wire surface heating is not even, leading to the inconsistent softening degree of it.

Description

Technical Field

[0001] This utility model belongs to the technical field of spring production equipment, and in particular relates to a softening device for spring steel wire. Background Technology

[0002] Spring steel wire is a type of steel wire used to make springs or wire profiles. Currently, in the production of spring steel wire, to soften the wire and increase its elasticity, it is often softened by heating and then quenching in quenching oil. This process usually involves the use of a spring steel wire softening device.

[0003] Chinese utility model patent with publication number "CN219930189U" and titled "Surface Softening Treatment Device for Spring Steel Wire" discloses a surface softening treatment device for spring steel wire. This utility model includes a conveying assembly, a heating assembly, a quenching assembly, and a storage assembly. The conveying assembly includes a base plate, with a support plate on top of the base plate. Two sets of support plates are arranged in parallel. A drive motor is mounted on the outer wall of one side of the support plate, with two sets of drive motors arranged in parallel. A drive shaft is mounted on one side of the drive motor, with a drive gear mounted on the outer wall of the drive shaft. A conveyor belt is mounted on the outer wall of the drive gear. The heating assembly includes a protective plate, with two sets of protective plates, each fixed to the top of the two sets of support plates in parallel by bolts. A burner is mounted on top of the protective plate, with a gas supply pipe on one side of the burner connected to the burner. A connecting flange is mounted on the outer wall of one end of the gas supply pipe. Multiple sets of flame nozzles are arranged in parallel at the bottom of the burner and connected to the burner.

[0004] The core of the aforementioned device is that the conveyor belt and burner work together to continuously heat multiple spring steel wires on the conveyor belt during material transport, thereby softening the spring steel wires. However, in actual use, because the spring steel wires are placed on the conveyor belt and the burner is located above them, the heating of the spring steel wires is not uniform, resulting in inconsistent softening of the surface of the spring steel wires. Utility Model Content

[0005] The purpose of this invention is to provide a softening device that can uniformly heat all surfaces of spring steel wire, thereby solving the technical problem that the uneven heating of the surface of spring steel wire by existing surface softening treatment devices leads to inconsistent softening degrees.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a softening device for spring steel wire, comprising a heating device, wherein a quenching device and a conveying device are respectively provided at the inlet and outlet of the heating device, the heating device comprising an induction heating coil and a supersaturated steam pipe arranged coaxially, the supersaturated steam pipe being connected to a supersaturated steam generator, the supersaturated steam pipe being nested inside the induction heating coil to form a hollow reaction chamber, and openings for the spring steel wire to enter and exit at both ends of the reaction chamber.

[0007] Preferably, it also includes a workbench, the heating device is mounted on the workbench, and a power supply mechanism for heating the induction heating coil is installed inside the workbench.

[0008] Preferably, the workbench is provided with several support seats, and the supersaturated steam pipe is fixedly connected to the support seats.

[0009] Preferably, the conveying device includes a conveying frame and a power mechanism. The conveying frame is provided with a driven wheel and a driving wheel that can be adjusted up and down. The driving wheel and the power mechanism are connected by a transmission.

[0010] Preferably, the supersaturated steam pipe is provided with guide frames on both sides, and the guide frames are provided with through holes for spring steel wires to pass through. A connecting pipe is connected to the guide frame on the side closer to the quenching device, and the other end of the connecting pipe is connected to the supersaturated steam pipe.

[0011] Preferably, the top of the connecting pipe is provided with a connection hole for connecting to a supersaturated steam generator, and the connecting pipe is provided with a plurality of circumferentially arranged air jet holes, which are connected to the saturated steam pipe.

[0012] Preferably, the quenching device includes a water tank, and a water pump is connected to one side of the water tank through a water outlet pipe. A spraying device is provided on the water tank. The spraying device includes an upper spray plate and a lower spray plate. Both the upper and lower spray plates are provided with a plurality of nozzles. A flow channel is formed inside the upper and lower spray plates. The flow channel is connected to the water pump through a water inlet pipe.

[0013] Preferably, a filter screen is provided at the top opening of the water tank, and the liquid sprayed by the spraying device re-enters the water tank through the filter screen and is then pumped back into the spraying device by a water pump to form a self-circulating liquid replenishment system.

[0014] Preferably, it also includes a tempering device, which is located on one side of the output end of the quenching device. The tempering device uses high-frequency induction heating to perform specific treatment on the near-surface structure of the finished steel wire, thereby reducing the hardness of the near-surface structure.

[0015] By employing the above technical solution, this utility model, compared with the prior art, has the following beneficial effects: By setting an induction heating coil and a supersaturated steam pipe, and nesting the supersaturated steam pipe inside the induction heating coil (i.e., the induction heating coil is wound around the outer wall of the saturated steam pipe), and connecting the two ends of the induction heating coil to a power source, when the spring steel wire enters the reaction chamber inside the saturated steam pipe through the conveying device, the induction heating wire heats the spring steel wire through the saturated steam pipe. Then, the saturated steam generator is activated, and the supersaturated steam introduced into the reaction chamber through the saturated steam generator causes a dense Fe3O4 oxide protective layer to form on the surface of the steel wire, thereby improving the wear resistance and airtightness of the material surface and enhancing the spring's durability. In the fatigue strength test, the induction heating coil heats all surfaces of the spring steel wire to ensure uniform heating. The spring steel wire is then transported to the quenching device via a second conveying device located between the heating and quenching devices. The quenching device sprays quenching liquid onto the spring steel wire using two sets of spray plates. The quenching liquid is then recycled through a self-circulating system formed by the water tank, water pump, and spraying device. Finally, the spring steel wire is transported to the tempering device, which also uses an induction heating coil connected to a high-frequency current. This process allows the induced current to penetrate the surface of all surfaces of the spring steel wire, and the high-frequency current induction heating rapidly raises the surface temperature to the tempering temperature, causing the surface to soften quickly.

[0016] In summary, this device can heat all surfaces of the spring steel wire by using induction heating coils, resulting in uniform heating and softening of the spring steel wire. Furthermore, the device is characterized by its compact structure, simple operation, and high softening efficiency. Attached Figure Description

[0017] 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 the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the heating device structure of this utility model; Figure 4 This is a schematic diagram of the quenching device of this utility model; Figure 5 This is a schematic diagram of the conveying device structure of this utility model; Figure 6 This is a schematic diagram of the internal cross-sectional structure of the butt joint pipe of this utility model; The utility model reference information is as follows: 1. Heating device; 2. Quenching device; 3. Conveying device; 4. Supersaturated steam generator; 5. Workbench; 6. Power supply mechanism; 7. Support base; 8. Guide frame; 9. Connecting pipe; 10. Tempering device; 101. Induction heating coil; 102. Supersaturated steam pipe; 103. Reaction chamber; 201. Water tank; 202. Upper spray plate; 203. Lower spray plate; 204. Nozzle; 205. Water pump; 206. Water inlet pipe; 207. Filter screen; 301. Conveying frame; 302. Driven wheel; 303. Driving wheel; 901. Connecting hole; 902. Air jet hole; The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The following will refer to the appendix in the embodiments of this utility model. Figure 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0022] like Figure 1-6The diagram shows a softening device for spring steel wire, comprising a heating device 1 for heating the spring steel wire. The heating device 1 has a quenching device 2 and a conveying device 3 at its inlet and outlet, respectively. The heating device 1 includes an induction heating coil 101 and a supersaturated steam pipe 102 coaxially arranged. The supersaturated steam pipe 102 is connected to a supersaturated steam generator 4, and is nested inside the induction heating coil 101 to form a hollow reaction chamber 103. Openings at both ends of the reaction chamber 103 allow the spring steel wire to enter and exit. The supersaturated steam generator 4 and the supersaturated steam pipe 102 work together to coat the spring steel wire. Specifically, after the spring steel wire is heated in the reaction chamber 103, the supersaturated steam generator 4 generates high-temperature steam through an external heater and introduces it into the reaction chamber 103. The supersaturated steam reacts with the surface of the spring steel wire, forming a dense layer of Fe3O4 on its surface.

[0023] It should be noted that an external heater may not be used. Instead, after the spring steel wire is heated, supersaturated steam is directly introduced into the reaction chamber 103, and the residual heat in the reaction chamber 103 is used for heating.

[0024] In addition, sealed chambers are provided at the inlet and outlet of the reaction chamber 103 to improve the sealing performance of the reaction chamber 103. At the same time, a ceramic heat insulation layer is provided between the outer wall of the supersaturated steam pipe 102 and the induction heating coil 101 to increase efficiency and stability.

[0025] like Figure 1-2 As shown: It also includes a workbench 5, a heating device 1 installed on the workbench 5, a conveying device 3 installed at the inlet of the heating device 1, a quenching device 2 abutting against the outlet of the heating device 1, and a power supply mechanism 6 for heating the induction heating coil 101 installed inside the workbench 5. In this embodiment, the power supply mechanism 6 is a power source. The two ends of the induction heating coil 101 extend through the through holes on the workbench 5 to the inner groove opened on the workbench 5. The power source is installed in the inner groove, so the two ends of the induction heating coil 101 are respectively connected to the positive and negative poles of the power source. The power supply mechanism 6 can continuously supply power to the induction heating coil 101 to maintain the heating state.

[0026] like Figure 1-3 As shown: The workbench 5 is provided with several support seats 7. The support seats 7 are bearing seats and have openings that match the supersaturated steam pipe 102. The two ends of the supersaturated steam pipe 102 pass through the openings on the two side support seats 7 and are fixedly connected to the support seats 7.

[0027] like Figure 5As shown: The conveying device 3 includes a conveying frame 301 and a power mechanism. The conveying frame 301 is equipped with a driven wheel 302 and a driving wheel 303 that can be adjusted up and down. The driving wheel 303 is connected to the power mechanism through a drive motor. The output end of the drive motor and a gear set on one side of the driving wheel 303 are connected through a conveyor belt. The drive motor drives the driving wheel 303 to rotate, thereby conveying the spring steel wire. A gap is formed between the driven wheel 302 and the driving wheel 303 for the spring steel wire to pass through. The conveying frame 301 is provided with a movable groove. The movable groove has an adjustable block that can move up and down. The top of the adjustable block is provided with an adjusting screw. The adjusting screw limits the position of the adjusting block in the movable groove. The two ends of the driven wheel 302 are fixed in the adjusting block. The distance between the driven wheel 302 and the driving wheel 303 is controlled by the movable adjusting block, thereby adjusting the size of the gap according to the spring steel wire of different diameters.

[0028] like Figure 1-3 As shown: Guide frames 8 are provided on both sides of the supersaturated steam pipe 102. The guide frames 8 are installed on the workbench 5 and located on both sides of the heating device 1. The guide frames 8 are provided with through holes for the spring steel wire to pass through. The through holes are provided to guide the spring steel wire. A connecting pipe 9 is connected to the guide frame 8 on the side closer to the quenching device 2. The other end of the connecting pipe 9 is connected to the saturated steam pipe 102.

[0029] like Figure 6 As shown: The top of the connecting pipe 9 is provided with a connecting hole 901 for connecting the supersaturated steam generator 4. The connecting pipe 9 is provided with a plurality of circumferentially arranged air jet holes 902. The air jet holes 902 are connected to the saturated steam pipe 102. A steam flow channel is formed inside the connecting pipe 9. The air jet holes 902 are opened on the side wall of the steam flow channel. The steam generated by the saturated steam generator 4 first enters the steam flow channel through the connecting hole 901, and then is ejected from the air jet holes 902 on the steam flow channel.

[0030] Specifically, by providing multiple circumferentially arranged air jet holes 902 on the inner side of the connecting pipe, supersaturated steam is sprayed onto the surface of the spring steel wire through the air jet holes 902. The supersaturated steam is simultaneously sprayed from the circumferentially arranged air jet holes towards the center, so that the supersaturated steam can fully and evenly contact the surface of the spring steel wire around the circumference, improve the sufficiency of the oxidation reaction and the uniformity of the oxide film formation, optimize the performance of the spring steel wire product, and facilitate subsequent processing.

[0031] like Figure 4As shown: The quenching device 2 includes a water tank 201. A water pump 205 is connected to one side of the water tank 201 through a water outlet pipe. A spraying device is provided on the water tank 201. The spraying device includes an upper spray plate 202 and a lower spray plate 203. The upper spray plate 202 and the lower spray plate 203 are respectively arranged on the conveying path of the spring steel wire so as to quench the various surfaces of the spring steel wire. Several nozzles 204 are provided on both the upper spray plate 202 and the lower spray plate 203. A spraying area for the spring steel wire to pass through is formed between the upper spray plate 202 and the lower spray plate 203. A flow channel is formed in the upper spray plate 202 and the lower spray plate 203. The flow channel is connected to the water pump 205 through a water inlet pipe 206.

[0032] like Figure 1 As shown: A filter screen 207 is provided at the top opening of the water tank 201. In this embodiment, the filter screen 207 has several green water holes arranged in a rectangular array. The liquid sprayed by the spraying device re-enters the water tank 201 through the filter screen 207 and is then drawn back into the spraying device by the water pump 205 to form a self-circulating liquid replenishment system. By setting up a self-circulating liquid replenishment system, the utilization rate of the quenching liquid can be improved, and liquid waste can be effectively avoided. Figure 2 As shown: It also includes a tempering device 10, which is located on one side of the output end of the quenching device 2. The tempering device 10 uses high-frequency induction heating to perform specific treatment on the near-surface structure of the finished steel wire, thereby reducing the hardness of the near-surface structure.

[0033] The tempering device 10 uses high-frequency current, which allows the induced current to penetrate into the surface of the spring steel wire. The high-frequency current induction heating causes the surface of the spring steel wire to heat up rapidly to the tempering temperature, which softens the surface quickly, reduces the internal stress caused by the deformation of the steel wire structure after processing, increases the shrinkage rate of the cross section, improves the rolling difficulty of ultra-high strength quenched and tempered steel wire and reduces its fracture risk.

[0034] The beneficial effects of this utility model are as follows: By setting up an induction heating coil 101 and a supersaturated steam pipe 102, with the supersaturated steam pipe 102 nested inside the induction heating coil 101 (i.e., the induction heating coil 101 is wound around the outer wall of the supersaturated steam pipe 102), and the two ends of the induction heating coil 101 are connected to a power source, when the spring steel wire enters the reaction chamber 103 inside the supersaturated steam pipe 102 through the conveying device 3, the induction heating coil 101 heats the spring steel wire through the supersaturated steam pipe 102. Then, the supersaturated steam generator 4 is activated, and the supersaturated steam introduced into the reaction chamber 103 by the supersaturated steam generator 4 causes a dense Fe3O4 oxide protective layer to form on the surface of the steel wire, thereby improving the wear resistance and airtightness of the material surface and increasing the fatigue strength of the spring. During this process, the induction heating coil 101 heats all surfaces of the spring steel wire, making the surface of the spring steel wire evenly heated. Then, the spring steel wire is transported to the quenching device 2 by the second conveying device located between the heating device 1 and the quenching device 2. The quenching device 2 sprays quenching liquid onto the spring steel wire through two sets of spray plates. After being sprayed out, the quenching liquid is recycled through the self-circulation system formed between the water tank 201, the water pump 205 and the spraying device. Finally, the spring steel wire is transported to the tempering device 10. The tempering device 10 is also an induction heating coil and is connected to a high-frequency current. During this process, the induced current penetrates into the surface layer of all surfaces of the spring steel wire. The high-frequency current induction heating causes the surface layer to heat up rapidly to the tempering temperature and softens the surface layer quickly.

[0035] In summary, this device can heat all surfaces of the spring steel wire by using induction heating coils, resulting in uniform heating and softening of the spring steel wire. Furthermore, the device is characterized by its compact structure, simple operation, and high softening efficiency.

[0036] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A softening device for spring steel wire, comprising a heating device (1), wherein a quenching device (2) and a conveying device (3) are respectively provided at the inlet and outlet of the heating device (1), characterized in that: The heating device (1) includes an induction heating coil (101) and a supersaturated steam pipe (102) arranged coaxially. The supersaturated steam pipe (102) is connected to a supersaturated steam generator (4). The supersaturated steam pipe (102) is nested inside the induction heating coil (101) to form a hollow reaction chamber (103). The reaction chamber (103) has openings at both ends for spring steel wires to enter and exit.

2. The softening device for spring steel wire according to claim 1, characterized in that: It also includes a workbench (5), on which the heating device (1) is installed, and a power supply mechanism (6) for heating the induction heating coil (101) is installed in the workbench (5).

3. A softening device for spring steel wire according to claim 2, characterized in that: The workbench (5) is provided with several support seats (7), and the supersaturated steam pipe (102) and the support seats (7) are fixedly connected.

4. A softening device for spring steel wire according to claim 1, characterized in that: The conveying device (3) includes a conveying frame (301) and a power mechanism. The conveying frame (301) is provided with a driven wheel (302) and a driving wheel (303) that can be adjusted up and down. The driving wheel (303) and the power mechanism are connected by transmission.

5. A softening device for spring steel wire according to any one of claims 1-4, characterized in that: The supersaturated steam pipe (102) is provided with guide frames (8) on both sides. The guide frames (8) are provided with through holes for spring steel wires to pass through. A connecting pipe (9) is connected to the guide frame (8) on the side closer to the quenching device (2). The other end of the connecting pipe (9) is connected to the saturated steam pipe (102).

6. A softening device for spring steel wire according to claim 5, characterized in that: The top of the connecting pipe (9) is provided with a connection hole (901) for connecting to the supersaturated steam generator (4). The connecting pipe (9) is provided with a plurality of circumferentially arranged air jet holes (902), and the air jet holes (902) are connected to the saturated steam pipe (102).

7. A softening device for spring steel wire according to claim 1, characterized in that: The quenching device (2) includes a water tank (201), and a water pump (205) is connected to one side of the water tank (201) through a water outlet pipe. The water tank (201) is equipped with a spraying device, which includes an upper spray plate (202) and a lower spray plate (203). Both the upper spray plate (202) and the lower spray plate (203) are equipped with a number of nozzles (204). A flow channel is formed in the upper spray plate (202) and the lower spray plate (203). The flow channel is connected to the water pump (205) through a water inlet pipe (206).

8. A softening device for spring steel wire according to claim 7, characterized in that: The top opening of the water tank (201) is equipped with a filter screen (207). The liquid sprayed by the spraying device re-enters the water tank (201) through the filter screen and is then pumped back into the spraying device by the water pump (205) to form a self-circulating liquid replenishment system.

9. A softening device for spring steel wire according to claim 1, characterized in that: It also includes a tempering device (10), which is located on one side of the output end of the quenching device (2). The tempering device (10) uses high-frequency induction heating to perform specific treatment on the near-surface structure of the finished steel wire, thereby reducing the hardness of the near-surface structure.

Images