A full-hydrogen annealing furnace for steel processing

Abstract

The present application relates to diaphragm spring annealing technical field, specifically speaking, a kind of full hydrogen formula annealing furnace for steel processing;Including stepped lower furnace body and the upper furnace body articulated with the lower furnace body;The lower furnace body is internally provided with the circulation heating component for gas circulation heating;The lower furnace body rear portion is provided with the gas source component for discharging and drawing into hydrogen;The lower surface of the lower furnace body is provided with lower annealing groove;Lower annealing groove is through the lower furnace body by front end, and the rear end of transparent gas cover of gas source component is fixedly connected;The upper surface of the upper furnace body is provided with upper annealing groove;The present application is through the synergistic cooperation of first motor, shaft, eccentric disc, staggered groove and staggered strip, utilizes the design that the eccentric direction of adjacent eccentric disc is opposite, drives adjacent workpiece staggered up and down, completely solves the problem of workpiece stacking contact, ensures that each workpiece surface is fully exposed, substantially increases hydrogen contact area, so that workpiece annealing efficiency and annealing uniformity are improved.

Description

Technical Field

[0001] This invention relates to the field of diaphragm spring annealing technology, specifically to a full hydrogen annealing furnace for steel processing. Background Technology

[0002] Diaphragm springs are core components of automotive braking systems, and their performance directly determines the stability and safety of the braking system. They are typically made from high-strength steel through multiple processing steps. The manufacturing of diaphragm springs begins with a disc-shaped steel billet, which needs to be formed through a stamping process to create a structural profile that meets design requirements. Annealing before stamping is a crucial step in ensuring the quality of subsequent processing. This is because the disc-shaped steel billet undergoes work hardening during rolling, leading to increased hardness and decreased plasticity. If it is directly stamped, problems such as billet cracking and excessive burrs on the stamped edges are likely to occur, affecting the forming accuracy and mechanical properties of the diaphragm spring. Therefore, the disc-shaped steel billet must be annealed before stamping to eliminate work hardening, reduce hardness, and restore plasticity, laying the foundation for subsequent stamping processes.

[0003] Currently, the annealing of disc-shaped steel billets for diaphragm springs mostly employs all-hydrogen annealing furnaces. The process involves generating heat through heating wires within the furnace, utilizing the high thermal conductivity of hydrogen to blow it onto the billet to be annealed, ensuring uniform heating. After reaching a preset temperature and holding it there, the heating wire temperature is slowly reduced, causing the billet to gradually cool down, completing the annealing process. However, existing all-hydrogen annealing furnaces typically stack multiple disc-shaped billets before feeding them into the furnace. Due to the stacked contact, most contact areas cannot directly contact the hydrogen, resulting in insufficient contact between the hydrogen and the billet. This not only reduces annealing efficiency but also causes inconsistent heating and cooling rates among different areas of each billet, ultimately leading to uneven annealing. This affects the performance consistency of the diaphragm spring billets, failing to meet the requirements of subsequent stamping and the use of diaphragm springs. Therefore, there is an urgent need for an all-hydrogen annealing furnace that can solve these problems. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes an all-hydrogen annealing furnace for steel processing. This invention utilizes the coordinated operation of a first motor, a rotating shaft, an eccentric disk, a staggered slot, and staggered bars. By employing the design of adjacent eccentric disks with opposite eccentric directions, adjacent workpieces are staggered vertically, completely solving the problem of workpiece stacking and contact. This ensures that the surface of each workpiece is fully exposed, significantly increasing the hydrogen contact area and improving the annealing efficiency and uniformity of the workpieces.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: A fully hydrogen-based annealing furnace for steel processing, comprising a stepped lower furnace body and an upper furnace body hinged to the lower furnace body; a circulating heating assembly for gas circulation heating is provided inside the lower furnace body; a gas source assembly for discharging and drawing in hydrogen is provided at the rear of the lower furnace body; a lower annealing groove is provided on the upper surface of the lower furnace body; the front end of the lower annealing groove penetrates the lower furnace body, and the rear end is fixedly connected to a transparent gas hood of the gas source assembly; an upper annealing groove is provided on the lower surface of the upper furnace body; the front end of the upper annealing groove penetrates the upper furnace body and is fixedly connected to... The upper annealing tank has a rear cover opening at its rear end that is adapted to and in sealed contact with the transparent gas hood; the bottom of the lower annealing tank has a strip-shaped staggered groove; staggered strips are slidably connected in the staggered groove; multiple staggered strips are distributed in the front-rear direction; adjacent staggered strips are in sliding contact; a drive groove is provided inside the lower furnace body and below the lower annealing tank; a rotating shaft driven by a first motor rotates in the drive groove; multiple eccentric disks distributed in the front-rear direction are connected to the outer wall of the rotating shaft; the eccentric directions of two adjacent eccentric disks are opposite; the eccentric disks in the front-rear direction correspond one-to-one with the staggered strips.

[0006] Preferably, the circulating heating assembly includes a first air pipe, a first bidirectional air pump, a first connecting pipe, a first heating box, and a second connecting pipe; the two first bidirectional air pumps are connected to the lower annealing tank through the first air pipe; the first bidirectional air pumps are connected to the corresponding first heating box below through the first connecting pipe; the first heating box is provided with an electrically heated heating wire; the two first heating boxes are connected through the second connecting pipe.

[0007] The gas source assembly includes a cylindrical transparent gas cover, a third connecting pipe, a second bidirectional gas pump, a reversing valve, and a gas storage tank; the end of the transparent gas cover away from the lower annealing tank is connected to the second bidirectional gas pump through the third connecting pipe; the second bidirectional gas pump is connected to the gas storage tank and the outside space through the reversing valve.

[0008] Preferably, the inner walls of the drive groove are provided with vertical grooves; a vertical electric push rod is fixedly connected in the vertical groove; a first motor is fixedly connected to the upper end of the vertical electric push rod; and the rotating shaft is fixedly connected to the output end of the first motor.

[0009] Preferably, the cross-section of the staggered groove is T-shaped; the cross-sectional shape of the staggered strip is adapted to the staggered groove; and the lower limit position of the upper end of the staggered strip is flush with the bottom of the lower annealing groove.

[0010] Preferably, a magnet is embedded in the rotating shaft; the staggered strip is made of magnetic material and can be attracted by the magnet.

[0011] Preferably, the upper annealing groove and the lower annealing groove are combined to form an annealing chamber; the left and right inner walls of the annealing chamber are provided with dispersion grooves; a dispersion plate with dispersion holes is slidably and sealed in the dispersion groove; a horizontal electric push rod is embedded in the bottom of the dispersion groove; the output end of the horizontal electric push rod is fixedly connected to the dispersion plate; the two symmetrically distributed dispersion plates are initially located in the corresponding dispersion grooves.

[0012] Preferably, the dispersing plate is composed of an upper plate and a lower plate; the upper plate is fixedly connected to the output end of the horizontal electric push rod; the upper plate is slidably connected to the upper position of the dispersing groove; the lower plate is slidably connected to the lower position of the dispersing groove; a hemispherical recess is provided on the lower surface of the upper plate; a hemispherical protrusion is provided on the upper surface of the lower plate; the protrusion and the recess are positioned in a one-to-one correspondence; the protrusion can be inserted into the recess; a pull groove is provided on the inner wall of the dispersing groove; the bottom of the pull groove is connected to the inner surface of the lower plate by a tension spring; limit blocks are provided on both the upper and lower inner walls of the dispersing groove.

[0013] Preferably, the top wall of the upper annealing tank is provided with an adjustment groove; a screw is rotatably connected in the adjustment groove; the end of the screw is driven by a second motor; the two ends of the screw have opposite threads; an adjustment block is slidably connected in the adjustment groove; an adjustment strip is fixedly connected to the lower surface of the adjustment block; the screw passes through the adjustment block and is threadedly connected to the adjustment block.

[0014] Preferably, the adjusting strip includes a first protrusion, a second protrusion, a third protrusion, and a first spring; the first protrusion is slidably connected to a second groove on the inner side of the second protrusion; the second protrusion is slidably connected to a third groove on the inner side of the third protrusion; a spring seat is fixedly connected to the lower part of the inner wall of the third groove; the spring seat is connected to the first protrusion by the first spring.

[0015] Preferably, the eccentric disk has an eccentric hole running through it; the outer wall of the rotating shaft has symmetrical notches; the inner wall of the eccentric hole and the arc-shaped outer wall of the eccentric disk have a stepped threaded hole; and a bolt is threaded into the threaded hole.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. This invention utilizes the coordinated operation of a first motor, a rotating shaft, an eccentric disk, a staggered slot, and staggered strips. By employing the design of adjacent eccentric disks with opposite eccentric directions, it drives adjacent workpieces to be staggered vertically, completely solving the problem of workpiece stacking and contact. This ensures that the surface of each workpiece is fully exposed, significantly increasing the hydrogen contact area and improving the annealing efficiency and uniformity of the workpieces.

[0018] 2. This invention changes the upward movement of the eccentric disc by adjusting the extension and retraction of the vertical electric push rod, thereby changing the upper limit position of the offset strip (the lower limit position is fixed), flexibly adjusting the degree of offset of the workpiece each time, accurately adapting to disc-shaped workpieces of different diameters, and greatly improving the applicability of the equipment.

[0019] 3. The present invention uses two movable and adjustable dispersion plates on the left and right sides to limit the workpieces of different diameters in the left and right directions during the annealing process, thereby improving the applicability of the annealing furnace. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a perspective view of the invention from another angle;

[0023] Figure 3 This is a perspective view of the lower furnace body in this invention;

[0024] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a structural diagram of the internal parts of the upper and lower furnace bodies in this invention;

[0026] Figure 6 yes Figure 5 Enlarged view of point B in the middle;

[0027] Figure 7 This is a cross-sectional view of the invention from left to right;

[0028] Figure 8 This is a cross-sectional view of the invention from front to back.

[0029] Figure 9 yes Figure 8 Enlarged view of point C in the middle;

[0030] Figure 10 yes Figure 8 Enlarged view of point D in the middle;

[0031] Figure 11 This is a three-dimensional view of the eccentric disk in this invention;

[0032] Figure 12 This is a perspective view of the adjustment bar in this invention.

[0033] In the diagram: Lower furnace body 1, Lower annealing groove 11, Staggered groove 12, Drive groove 13, Vertical groove 14, Annealing chamber 15, Dispersion groove 16, Pulling groove 17, Limiting block 18, Upper furnace body 2, Upper annealing groove 21, Front cover 22, Rear cover opening 23, Adjustment groove 24, Circulating heating assembly 3, First gas pipe 31, First bidirectional gas pump 32, First connecting pipe 33, First heating box 34, Second connecting pipe 35, Gas source assembly 4, Transparent gas hood 41, Third connecting pipe 42, Second bidirectional gas pump 43, Reversing valve 44, Gas storage tank 45, Vertical electric push rod 5 51. Staggered strip, 52. First motor, 53. Rotating shaft, 531. Notch, 54. Eccentric disc, 541. Eccentric hole, 542. Threaded hole, 543. Bolt, 55. Magnet, 6. Dispersion plate, 61. Dispersion hole, 62. Horizontal electric push rod, 63. Upper plate, 64. Lower plate, 65. Recess, 66. Protrusion, 67. Tension spring, 78. Second motor, 79. Screw, 71. Adjusting block, 72. Adjusting strip, 73. First protrusion, 732. Second protrusion, 733. Third protrusion, 734. First spring, 735. Second groove, 736. Spring seat, 737. Third groove, 738. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0035] like Figures 1 to 12 As shown, the present invention includes the following embodiments:

[0036] Example 1: A hydrogen-based annealing furnace for steel processing includes a stepped lower furnace body 1 and an upper furnace body 2 hinged to the lower furnace body 1; the lower furnace body 1 is equipped with a circulating heating component 3 for gas circulation heating; the rear of the lower furnace body 1 is equipped with a gas source component 4 for venting and drawing in hydrogen; a lower annealing groove 11 is provided on the upper surface of the lower furnace body 1; the front end of the lower annealing groove 11 penetrates the lower furnace body 1, and the rear end is fixedly connected to a transparent gas hood 41 of the gas source component 4; an upper annealing groove 21 is provided on the lower surface of the upper furnace body 2; the front end of the upper annealing groove 21 penetrates the upper furnace body 2 and is fixedly connected to a front end cover 22; the rear end of the upper annealing groove 21 is provided with... The lower furnace body 1 has a rear cover opening 23 that is compatible with and in sealed contact with the transparent gas hood 41; the bottom of the lower annealing groove 11 is provided with a strip-shaped staggered groove 12; staggered strips 51 are slidably connected in the staggered groove 12; multiple staggered strips 51 are distributed in the front-back direction; adjacent staggered strips 51 are slidably engaged in contact; a drive groove 13 is provided inside the lower furnace body 1 and below the lower annealing groove 11; a rotating shaft 53 driven by a first motor 52 rotates in the drive groove 13; multiple eccentric disks 54 distributed in the front-back direction are connected to the outer wall of the rotating shaft 53; the eccentric directions of two adjacent eccentric disks 54 are opposite; the eccentric disks 54 in the front-back direction correspond one-to-one with the staggered strips 51.

[0037] In this embodiment, the circulating heating assembly 3 includes a first air pipe 31, a first bidirectional air pump 32, a first connecting pipe 33, a first heating box 34, and a second connecting pipe 35; the two first bidirectional air pumps 32 are connected to the lower annealing tank 11 through the first air pipe 31; the first bidirectional air pumps 32 are connected to the corresponding first heating box 34 below through the first connecting pipe 33; the first heating box 34 is provided with an electrically heated heating wire; the two first heating boxes 34 are connected through the second connecting pipe 35.

[0038] The gas source assembly 4 includes a cylindrical transparent gas cover 41, a third connecting pipe 42, a second bidirectional air pump 43, a reversing valve 44, and a gas storage tank 45; the end of the transparent gas cover 41 away from the lower annealing groove 11 is connected to the second bidirectional air pump 43 through the third connecting pipe 42; the second bidirectional air pump 43 is connected to the gas storage tank 45 and the outside space through the reversing valve 44.

[0039] First, prepare the disc-shaped steel billet to be annealed (hereinafter referred to as the workpiece). Stack multiple workpieces neatly to ensure that the stacking is orderly, so as to facilitate the subsequent pushing into the annealing tank. Then, operate the upper furnace body 2, which is hinged to the lower furnace body 1, and lift the upper furnace body 2 upward to completely expose the lower annealing tank 11 on the upper surface of the lower furnace body 1. At this time, the inlet at the front end of the lower annealing tank 11 is in a through state, and the rear end is fixedly connected to the transparent gas cover 41 of the gas source component 4. The staff can clearly observe the distribution of the staggered strips 51 inside the lower annealing tank 11. Multiple staggered strips 51 are evenly distributed in the front-back direction, and two adjacent staggered strips 51 slide and contact each other. The thickness of each staggered strip 51 is adapted to the thickness of the workpiece to ensure that each staggered strip 51 can accurately correspond to an independent workpiece.

[0040] After the workpieces are stacked and the upper furnace body 2 is opened, the stacked workpieces are slowly pushed into the lower annealing groove 11 from the inlet at the front end. During the pushing process, ensure that the workpieces are placed stably at the bottom of the lower annealing groove 11, with each workpiece precisely corresponding to a staggered strip 51 to prevent workpiece misalignment that would prevent subsequent staggering actions from working properly. After the workpieces are pushed into place, the upper furnace body 2 is closed, making the upper furnace body 2 and the lower furnace body 1 fit tightly together. To ensure the sealing of the annealing process, a lock is installed on the left side of the upper furnace body 2 and the lower furnace body 1 away from the hinge point to lock the upper furnace body 2 and the lower furnace body 1 tightly and fix them to prevent the upper furnace body 2 from loosening and hydrogen leakage during the annealing process. After the upper furnace body 2 is closed and locked, the upper annealing groove 21 on the lower surface of the upper furnace body 2 is precisely aligned with the lower annealing groove 11, with the upper annealing groove 21 at the front end of the upper annealing groove 21... The front cover 22 precisely blocks and seals the inlet at the front end of the lower annealing groove 11, and the rear cover opening 23 at the rear end of the upper annealing groove 21 is in close contact with the transparent gas hood 41. The seamless connection is achieved through the sealing fit. At this time, the upper annealing groove 21 and the lower annealing groove 11 together form a closed annealing chamber 15, providing a sealed environment for subsequent hydrogen filling and heating annealing, and preventing air from entering and hydrogen from leaking, which would affect the annealing quality. After the annealing chamber 15 is sealed, the gas source assembly 4 is started to work. The reversing valve 44 of the gas source assembly 4 can be an electromagnetic reversing valve 44 or a pneumatic reversing valve 44, which is convenient for realizing automated control. The transparent gas hood 41 is made of high temperature resistant transparent material, and the staff can observe the various states inside the annealing chamber 15 in real time through the transparent gas hood 41 and detect abnormalities in time.

[0041] First, control the reversing valve 44 to switch to the state of communication with the outside space, and start the second bidirectional air pump 43. The second bidirectional air pump 43 starts working, gradually venting the air in the annealing chamber 15 to the outside through the transparent air cover 41, the third connecting pipe 42, the second bidirectional air pump 43, and the reversing valve 44. During the evacuation process, the situation inside the annealing chamber 15 can be observed through the transparent air cover 41 until the air in the annealing chamber 15 is completely evacuated to avoid mixing with the subsequently injected hydrogen, which would affect the annealing effect and prevent the hydrogen and air from mixing and causing safety hazards. After the air in the annealing chamber 15 is evacuated, control the reversing valve 44 to perform the reversing operation. The process involves connecting the annealing chamber 15 to the gas storage tank 45 via the transparent gas hood 41, the third connecting pipe 42, and the second bidirectional gas pump 43. Then, the second bidirectional gas pump 43 is controlled to work in reverse to extract the hydrogen stored in the gas storage tank 45. The hydrogen is then slowly injected into the annealing chamber 15 along the reversing valve 44, the second bidirectional gas pump 43, the third connecting pipe 42, and the transparent gas hood 41. During the injection process, a uniform speed is maintained to avoid the workpiece shifting due to excessive hydrogen flow. At the same time, the hydrogen filling status is observed through the transparent gas hood 41 until the annealing chamber 15 is completely filled with hydrogen. Then, the gas source assembly 4 is turned off to stop the hydrogen injection, thus completing the hydrogen filling preparation before annealing.

[0042] After hydrogen filling is completed, the circulating heating assembly 3 is started to begin heating and annealing the workpiece. First, the heating wires in the two first heating chambers 34 are energized. The heating wires generate heat after being energized. The heating temperature is precisely controlled by adjusting the current of the heating wires. When the current increases, the temperature of the heating wires rises, and when the current decreases, the temperature of the heating wires decreases. The temperature can be flexibly adjusted to the preset annealing temperature according to the annealing requirements of the workpiece. Then, the two first bidirectional air pumps 32 are started. The two first bidirectional air pumps 32 deliver gas in opposite directions to form a bidirectional circulating airflow, ensuring that the hydrogen in the annealing chamber 15 is heated and flows evenly. The first bidirectional air pump 32 on the left is started to extract the hydrogen in the first heating chamber 34 on the left. The hydrogen enters the first bidirectional air pump 32 on the left along the first connecting pipe 33 on the left, and then enters the first bidirectional air pump 32 on the left through the first air pipe 31 on the left. After entering the annealing chamber 15, the hydrogen is evenly distributed around each workpiece, transferring heat to the surface of the workpiece.

[0043] Subsequently, the hydrogen gas in the annealing chamber 15 enters the right-hand first bidirectional gas pump 32 through the right-hand first gas pipe 31, and then is sent into the right-hand first heating box 34 through the left-hand first connecting pipe 33. The hydrogen gas is heated by the heating wire in the right-hand first heating box 34, and after the temperature rises, it flows into the left-hand first heating box 34 through the second connecting pipe 35, forming a gas circulation from left to right. After a preset time (which can be set according to the workpiece specifications and annealing requirements), the two first bidirectional gas pumps 32 are controlled to work in reverse. At this time, the right-hand first bidirectional gas pump 32 pumps the heated hydrogen gas in the right-hand first heating box 34. The hydrogen gas is extracted and fed into the annealing chamber 15 along the first connecting pipe 33, the first bidirectional air pump 32, and the first air pipe 31. The hydrogen gas in the annealing chamber 15 is fed into the first heating box 34 on the left along the first air pipe 31, the first bidirectional air pump 32, and the first connecting pipe 33 on the left. After being heated by the heating wire, it flows into the first heating box 34 on the right through the second connecting pipe 35, forming a reverse circulation from right to left. Through this bidirectional alternating circulation, the hydrogen gas in the annealing chamber 15 can flow evenly in all directions, avoiding uneven local hydrogen gas temperature and ensuring that the workpiece in each area can come into contact with hydrogen gas at a consistent temperature.

[0044] While the circulating heating component 3 is working and hydrogen is heating the workpiece, the first motor 52 is started. The first motor 52 drives the rotating shaft 53 in the drive groove 13 to rotate synchronously. When the rotating shaft 53 rotates, multiple eccentric disks 54 on its outer wall also rotate synchronously. The eccentric directions of two adjacent eccentric disks 54 are opposite, and each eccentric disk 54 corresponds one-to-one with each staggered strip 51. During the rotation of the eccentric disk 54, its eccentric part will continuously squeeze the lower end of the corresponding staggered strip 51, pushing the staggered strip 51 to slide up and down along the staggered groove 12. Specifically, when the eccentric part of the eccentric disk 54 rotates to the upper limit point, it will exert an upward force on the lower end of the staggered strip 51. The squeezing force pushes the staggered strip 51 upward along the staggered groove 12 until it reaches the upper limit position, while simultaneously moving the corresponding workpiece upward. When the eccentric part of the eccentric disk 54 rotates to the lower limit point, the squeezing force on the staggered strip 51 disappears, and the staggered strip 51 slides downward along the staggered groove 12 under its own gravity, returning to the lower limit position, while simultaneously moving the corresponding workpiece downward. Since the eccentric directions of the two adjacent eccentric disks 54 are opposite, the upward and downward sliding directions of the two adjacent staggered strips 51 are also opposite. That is, when the front staggered strip 51 slides upward and moves the corresponding workpiece upward, the rear staggered strip 51 will slide downward and move the corresponding workpiece downward.

[0045] When the forward staggered strip 51 slides downward, causing the corresponding workpiece to move downward, the backward staggered strip 51 slides upward, causing the corresponding workpiece to move upward. This ensures that the two adjacent workpieces are always staggered vertically, completely avoiding the problem of the contact area not being able to contact hydrogen due to workpiece stacking. At the same time, the thickness of the staggered strip 51 is adapted to the thickness of the workpiece, and each staggered strip 51 corresponds to an independent workpiece, ensuring that each workpiece can be precisely driven to achieve full staggering, allowing the surface of each workpiece to be fully exposed to hydrogen.

[0046] After the workpiece is heated to the preset annealing temperature, it enters the heat preservation and cooling stage. At this time, the current of the heating wire in the first heating chamber 34 is gradually reduced to lower the temperature of the heating wire. The circulating heating component 3 continues to maintain a bidirectional circulating operation, so that the temperature of the hydrogen in the annealing chamber 15 is slowly reduced, thereby driving the workpiece to gradually cool down. This avoids stress and cracking caused by the workpiece cooling down too quickly, ensuring the annealing quality. During the heat preservation and cooling process, the state of the workpiece can be observed through the transparent gas hood 41. At the same time, the sealing of the annealing chamber 15 is maintained until the workpiece temperature drops to the required annealing temperature, completing the entire heating and annealing process. After the annealing process is completely completed, the circulating heating component 3 and the first motor 52 are turned off to stop the heating and workpiece separation.

[0047] After the temperature in the annealing chamber 15 drops to room temperature and the hydrogen is completely cooled, the gas source assembly 4 is restarted, the reversing valve 44 is switched to the state of being connected to the gas storage tank 45, and the second bidirectional gas pump 43 is started to extract the hydrogen in the annealing chamber 15. The extracted hydrogen can be recycled back to the gas storage tank 45 for reuse, avoiding hydrogen waste and preventing hydrogen leakage from causing safety hazards. After the hydrogen is completely extracted, the reversing valve 44 is switched to the state of being connected to the outside, and the second bidirectional gas pump 43 is started to inject outside gas into the annealing chamber 15 to balance the internal and external pressures. The lock between the upper furnace body 2 and the lower furnace body 1 is opened, and the upper furnace body 2 is slowly lifted to expose the lower annealing tank 11 again. Then, the annealed workpiece is taken out from the inlet at the front end of the lower annealing tank 11, and after being neatly arranged, the entire annealing operation is completed and the subsequent punching process can be started.

[0048] The present invention utilizes the coordinated operation of the first motor 52, the rotating shaft 53, the eccentric disk 54, the staggered groove 12 and the staggered strip 51, and the design of the adjacent eccentric disks 54 with opposite eccentric directions to drive the adjacent workpieces to be staggered vertically, thus completely solving the problem of workpiece stacking and contact, ensuring that the surface of each workpiece is fully exposed, greatly increasing the hydrogen contact area, and improving the annealing efficiency and annealing uniformity of the workpieces.

[0049] Example 2: The front and rear inner walls of the drive groove 13 are provided with vertical grooves 14; a vertical electric push rod 5 is fixedly connected in the vertical groove 14; the upper end of the vertical electric push rod 5 is fixedly connected to the housing of the first motor 52 through a push rod block; the rotating shaft 53 passes through the push rod block and is fixedly connected to the output end of the first motor 52, and the rotating shaft 53 is rotatably connected to the push rod block.

[0050] In this embodiment, the cross-section of the staggered groove 12 is T-shaped; the cross-sectional shape of the staggered strip 51 is adapted to the staggered groove 12; the lower limit position of the upper end of the staggered strip 51 is flush with the bottom of the lower annealing groove 11.

[0051] In this embodiment, a magnet 55 is embedded in the rotating shaft 53; the staggered strip 51 is made of magnetic material and can be magnetically attracted by the magnet 55.

[0052] In the initial state, the vertical electric push rod 5 is in a retracted state, driving the first motor 52, the rotating shaft 53, and the eccentric disk 54 to the lower limit position of the drive groove 13. At this time, all eccentric disks 54 are disengaged from the lower end of the staggered bar 51. The lower limit position of the staggered bar 51 is fixed, and its upper end is flush with the bottom of the lower annealing groove 11. This ensures that stacked disc-shaped workpieces can be smoothly pushed into and removed from the lower annealing groove 11, avoiding the impact of uneven groove bottoms on the ease of loading and unloading. The upper limit position of the staggered bar 51 is not fixed, but depends on the upper limit of the eccentric disk 54. The degree of displacement is changed, thereby adjusting the offset amplitude of the offset strip 51 each time, which is the degree of offset of the workpiece each time, so as to adapt to disc-shaped workpieces of different diameters. When the annealing operation begins and the workpieces need to be offset, the vertical electric push rod 5 is extended to drive the first motor 52, the rotating shaft 53 and the eccentric disk 54 to move upward synchronously. The greater the upward movement of the eccentric disk 54, the greater the extrusion stroke of the offset strip 51, the higher the upper limit position of the offset strip 51, and the greater the degree of offset between two adjacent workpieces. This ensures that workpieces of different specifications and diameters can be fully offset and fully contacted with hydrogen.

[0053] During the annealing process, the extension of the vertical electric push rod 5 can be flexibly adjusted according to the workpiece diameter to change the upward movement of the eccentric disk 54, thereby adjusting the degree of workpiece staggering and ensuring the uniformity of annealing for workpieces of different diameters. At the same time, the staggering strip 51 is made of magnetic material (such as iron), and a magnet 55 is installed inside the rotating shaft 53. The magnet 55 generates magnetic attraction to the staggering strip 51. Its function is not to make the staggering strip 51 return to its original position quickly, but to prevent the staggering strip 51 and the workpiece from returning to their original position in time after the eccentric disk 54 pushes the workpiece upward. This ensures that adjacent workpieces do not fall back synchronously, achieving continuous and orderly staggering of workpieces, avoiding insufficient staggering due to synchronous return of workpieces, and ensuring that each workpiece can continuously and fully contact hydrogen, thus ensuring the annealing effect.

[0054] This invention changes the upward movement of the eccentric disk 54 by adjusting the extension and retraction of the vertical electric push rod 5, thereby changing the upper limit position of the offset strip 51 (the lower limit position is fixed), flexibly adjusting the degree of offset of the workpiece each time, accurately adapting to disc-shaped workpieces of different diameters, and greatly improving the applicability of the equipment.

[0055] Example 3: The upper annealing groove 21 and the lower annealing groove 11 are combined to form an annealing chamber 15; the left and right inner walls of the annealing chamber 15 are provided with dispersion grooves 16; a dispersion plate 6 with dispersion holes 61 is slidably and sealingly connected to the dispersion groove 16; a horizontal electric push rod 62 is embedded in the bottom of the dispersion groove 16; the output end of the horizontal electric push rod 62 is fixedly connected to the dispersion plate 6; the two symmetrically distributed dispersion plates 6 are initially located in the corresponding dispersion grooves 16.

[0056] In this embodiment, the dispersing plate 6 is composed of an upper plate 63 and a lower plate 64; the upper plate 63 is fixedly connected to the output end of the horizontal electric push rod 62; the upper plate 63 is slidably connected to the upper position of the dispersing groove 16; the lower plate 64 is slidably connected to the lower position of the dispersing groove 16; a hemispherical recess 65 is provided on the lower surface of the upper plate 63; a hemispherical protrusion 66 is provided on the upper surface of the lower plate 64; the protrusion 66 and the recess 65 are positioned one-to-one; the protrusion 66 can be inserted into the recess 65; a pull groove 17 is provided on the inner wall of the dispersing groove 16; (a guide rod fixedly connected to the lower plate 64 is slidably connected in the pull groove 17, and the guide rod is connected to the bottom of the pull groove 17 through a tension spring 67) the bottom of the pull groove 17 is connected to the inner surface of the lower plate 64 through a tension spring 67; limit blocks 18 are provided on both the upper and lower inner walls of the dispersing groove 16.

[0057] Open the upper furnace body 2, causing the upper plate 63 to detach from the lower plate 64, and load the workpiece into the lower annealing tank 11; close and lock the upper furnace body 2, with the upper plate 63 and lower plate 64 connected by a recess 65 and a protrusion 66 to form a dispersion plate 6; control the horizontal electric push rod 62 to extend, causing the two dispersion plates 6 to move closer to each other, adapting to workpieces of different diameters and limiting their movement to prevent the workpieces from moving left or right during the vertical misalignment process; hydrogen can flow normally through the dispersion holes 61 of the dispersion plate 6 without affecting the annealing; after annealing, control the horizontal electric push rod 62 to shorten, and the dispersion plate 6 retracts into the dispersion tank 16 and contacts the limiting block 18; open the upper furnace body 2, causing the upper plate 63 to detach from the lower plate 64, and the lower plate 64 is tightened and fixed by the tension spring 67, facilitating precise alignment when the upper plate 63 is closed laterally, and then the workpiece can be removed and a new workpiece can be loaded; in this embodiment, the two movable and adjustable dispersion plates 6 allow the workpieces of different diameters to be limited in the left and right directions during the annealing process, thus improving the applicability of the annealing furnace.

[0058] Example 4: An adjustment groove 24 is provided on the top wall of the upper annealing groove 21; a screw 71 is rotatably connected in the adjustment groove 24; the end of the screw 71 is driven by a second motor 7; the two ends of the screw 71 are threaded in opposite directions; an adjustment block 72 is slidably connected in the adjustment groove 24; an adjustment strip 73 is fixedly connected to the lower surface of the adjustment block 72; the screw 71 passes through the adjustment block 72 and is threadedly connected to the adjustment block 72.

[0059] In this embodiment, the adjusting strip 73 includes a first protrusion 732, a second protrusion 733, a third protrusion 734, and a first spring 735; the first protrusion 732 is slidably connected to the second protrusion 736 on the inner side of the second protrusion 733; the second protrusion 733 is slidably connected to the third protrusion 734 on the inner side of the third protrusion 734; a spring seat 737 is fixedly connected to the lower part of the inner wall of the third protrusion 738; the spring seat 737 and the first protrusion 732 are connected by the first spring 735.

[0060] Open the upper furnace body 2 to move the lower end of the adjusting bar 73 out of the lower annealing groove 11, and load the workpiece into the lower annealing groove 11; after closing the upper furnace body 2, the adjusting bar 73 is located on the front and rear sides of the stacked workpieces. Start the second motor 7 to drive the screw 71 to rotate. Because the threads at both ends of the screw 71 are opposite, the two adjusting blocks 72 and the adjusting bar 73 move closer to each other, which limits the front and rear of the workpiece and is suitable for annealing different numbers of stacked workpieces; during annealing, when the staggered bar 51 moves the workpiece up and down, the adjusting bar 73 slides through the first protrusion 732 in the second protrusion groove 736 of the second protrusion 733, and the second protrusion 733 slides in the third protrusion groove 738 of the third protrusion 734. With the extension and retraction of the first spring 735, it achieves contraction and reset, adapts to the up and down movement of the workpiece, does not affect the staggered and return of the workpiece, and ensures the stability of the limit.

[0061] Example 5: The eccentric disk 54 is provided with an eccentric hole 541 running through the front and rear; the outer wall of the rotating shaft 53 is provided with symmetrical notches 531; the inner wall of the eccentric hole 541 is provided with a stepped threaded hole 542 that connects to the arc-shaped outer wall of the eccentric disk 54; the threaded hole 542 is internally threaded with a bolt 543.

[0062] Before annealing, open the inspection door on the right side of the annealing furnace and adjust the eccentric disc 54 in the drive slot 13; loosen the bolt 543 in the threaded hole 542 so that the bolt 543 is disengaged from the notch 531 on the outer wall of the rotating shaft 53. At this time, the eccentric disc 54 can move circumferentially on the rotating shaft 53. The core adjustment logic is as follows: divide multiple eccentric discs 54 (such as 3) into a group, and match the total thickness of each group of eccentric discs 54 with the thickness of a single workpiece to be annealed. Then adjust the 3 eccentric discs 54 in the same group to the same eccentric direction, while adjust the eccentric discs 54 in two adjacent groups to opposite eccentric directions. After the adjustment is completed, tighten the bolt 543 so that the bolt 543 is inserted into the notch 531 to fix all the eccentric discs 54, and start the annealing operation. This will enable the precise staggered annealing of adjacent workpieces of different thicknesses.

[0063] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance. In the description of the present invention, fixed connection refers to fixed connection.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogen-based annealing furnace for steel processing, comprising a stepped lower furnace body and an upper furnace body hinged to the lower furnace body; the lower furnace body is provided with a circulating heating assembly for gas circulation heating; the rear of the lower furnace body is provided with a gas source assembly for gas discharge and extraction; characterized in that: The lower furnace body has a lower annealing groove on its upper surface; the front end of the lower annealing groove passes through the lower furnace body, and the rear end is fixedly connected to a transparent gas hood of the gas source assembly; the upper furnace body has an upper annealing groove on its lower surface; the front end of the upper annealing groove passes through the upper furnace body and is fixedly connected to a front end cover; the rear end of the upper annealing groove has a rear cover opening that is adapted to and in sealed contact with the transparent gas hood; the bottom of the lower annealing groove has a strip-shaped staggered groove; staggered strips slide vertically within the staggered groove; multiple staggered strips are distributed in the front-rear direction; adjacent staggered strips slide in contact; a drive groove is provided inside the lower furnace body and below the lower annealing groove; a rotating shaft driven by a first motor rotates within the drive groove; multiple eccentric disks distributed in the front-rear direction are connected to the outer wall of the rotating shaft; the eccentric directions of two adjacent eccentric disks are opposite; the eccentric disks in the front-rear direction correspond one-to-one with the staggered strips. The circulating heating assembly includes a first air pipe, a first bidirectional air pump, a first connecting pipe, a first heating box, and a second connecting pipe; the two first bidirectional air pumps are connected to the lower annealing tank through the first air pipe; the first bidirectional air pumps are connected to the corresponding first heating box below through the first connecting pipe; the first heating box is equipped with an electrically heated heating wire; the two first heating boxes are connected through the second connecting pipe. The gas source assembly includes a cylindrical transparent gas cover, a third connecting pipe, a second bidirectional gas pump, a reversing valve, and a gas storage tank; the end of the transparent gas cover away from the lower annealing tank is connected to the second bidirectional gas pump through the third connecting pipe; the second bidirectional gas pump is connected to the gas storage tank and the outside space through the reversing valve. The drive groove has vertical grooves on its front and rear inner walls; a vertical electric push rod is fixedly connected in the vertical groove; the upper end of the vertical electric push rod is fixedly connected to the housing of the first motor; the rotating shaft is fixedly connected to the output end of the first motor. The cross-section of the staggered groove is T-shaped; the cross-sectional shape of the staggered strip is adapted to the staggered groove; the lower limit position of the upper end of the staggered strip is flush with the bottom of the lower annealing groove; a magnet is embedded in the rotating shaft; the staggered strip is made of magnetic material and can be attracted by the magnet.

2. The all-hydrogen annealing furnace for steel processing according to claim 1, characterized in that: The upper annealing groove and the lower annealing groove are combined to form an annealing chamber; the left and right inner walls of the annealing chamber are provided with dispersion grooves; a dispersion plate with dispersion holes is slidably and sealed in the dispersion groove; a horizontal electric push rod is embedded in the bottom of the dispersion groove; the output end of the horizontal electric push rod is fixedly connected to the dispersion plate; the two symmetrically distributed dispersion plates are initially located in the corresponding dispersion grooves.

3. The all-hydrogen annealing furnace for steel processing according to claim 2, characterized in that: The dispersing plate is composed of an upper plate and a lower plate; the upper plate is fixedly connected to the output end of the horizontal electric push rod; the upper plate is slidably connected to the upper position of the dispersing groove; the lower plate is slidably connected to the lower position of the dispersing groove; a hemispherical recess is provided on the lower surface of the upper plate; a hemispherical protrusion is provided on the upper surface of the lower plate; the protrusion and the recess are positioned in a one-to-one correspondence; the protrusion can be inserted into the recess; a pull groove is provided on the inner wall of the dispersing groove; the bottom of the pull groove is connected to the inner surface of the lower plate by a tension spring; limit blocks are provided on both the upper and lower inner walls of the dispersing groove.

4. The all-hydrogen annealing furnace for steel processing according to claim 1, characterized in that: An adjustment groove is provided on the top wall of the upper annealing tank; a screw is rotatably connected in the adjustment groove; the end of the screw is driven by a second motor; the two ends of the screw have opposite threads; an adjustment block is slidably connected in the adjustment groove; an adjustment strip is fixedly connected to the lower surface of the adjustment block; the screw passes through the adjustment block and is threadedly connected to the adjustment block.

5. A fully hydrogen-based annealing furnace for steel processing according to claim 4, characterized in that: The adjusting strip includes a first protrusion, a second protrusion, a third protrusion, and a first spring; the first protrusion is slidably connected to a second groove on the inner side of the second protrusion; the second protrusion is slidably connected to a third groove on the inner side of the third protrusion; a spring seat is fixedly connected to the lower part of the inner wall of the third groove; the spring seat is connected to the first protrusion by a first spring.

6. The all-hydrogen annealing furnace for steel processing according to claim 1, characterized in that: The eccentric disk has an eccentric hole running through it from front to back; the outer wall of the rotating shaft has symmetrical notches; the inner wall of the eccentric hole and the arc-shaped outer wall of the eccentric disk have a stepped threaded hole; the threaded hole is threaded with a bolt.

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