A pressurized tempering furnace with hot air circulation

Abstract

This invention belongs to the technical field of tempering furnaces, specifically a pressurized tempering furnace with hot air circulation; it includes a furnace body; a support frame plate is provided inside the furnace body, and a heat-proof box is provided on the top of the support frame plate. A locking and positioning device is provided on the heat-proof box, and the workpiece is located on the top of the heat-proof box; positioning base plates are also installed on both sides of the heat-proof box, and the workpiece is placed on the positioning base plates; the locking and positioning device also includes two sets of bent square rods located on both sides of the workpiece, with two bent square rods in each set and symmetrically distributed; a locking base plate is installed at one end of the bent square rod, and a locking square tube is provided on the side of the locking base plate closest to the workpiece, and an edge-fitting adapter is provided on the locking square tube; the locking and positioning device avoids the need to change the matching clamps when performing tempering operations on different workpieces, reducing the workload of the workers, enabling the equipment to perform clamping operations on workpieces of different shapes, and improving the use effect of the equipment.

Description

Technical Field

[0001] This invention belongs to the field of tempering furnace technology, specifically a pressurized tempering furnace with hot air circulation. Background Technology

[0002] Many metal parts, such as hardware components or automotive parts, require quenching to increase surface strength, improve wear resistance and contact hardness to meet design requirements. After quenching, these parts need to be tempered in a tempering furnace to eliminate internal stresses generated during quenching, reduce material hardness, and improve toughness and plasticity, thus giving the workpiece good overall mechanical properties. The tempering furnace generates heat through heating elements (such as resistance wires), raising the temperature inside the furnace. The heated air exchanges heat with the workpiece inside the furnace. After absorbing heat, the internal structure of the workpiece changes, thereby achieving the purpose of tempering.

[0003] During tempering, to ensure uniform heating of all parts of the metal workpiece and avoid thermal stress concentration, deformation, or even cracking caused by localized temperature differences, it is essential to install hot air circulation in the tempering furnace. This effectively prevents the aforementioned phenomena. However, existing equipment has certain limitations in use. For some metal workpieces with complex shapes, the original clamps often cannot directly and effectively hold them. It is necessary to replace them with suitable special clamps to properly fix the metal workpieces in the furnace for tempering. This process not only increases the workload of operators but also reduces the flexibility of the equipment when dealing with metal workpieces of different shapes. If the metal workpiece is simply placed randomly in the furnace, the heat waves inside the furnace can easily cause the position of the metal workpiece to change or cause it to shake during tempering, which can adversely affect the tempering quality of the metal workpiece and reduce the effectiveness of the equipment. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a pressurized tempering furnace with hot air circulation, which effectively solves the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pressurized tempering furnace with hot air circulation, comprising a furnace body; a support frame plate is provided inside the furnace body, a heat-proof box is provided on the top of the support frame plate, a locking and positioning device is provided on the heat-proof box, the locking and positioning device is used to position the workpiece around its perimeter, the workpiece is located on the top of the heat-proof box; positioning base plates are also installed on both sides of the heat-proof box, the workpiece is placed on the positioning base plates; the locking and positioning device further includes two sets of bent square rods located on both sides of the workpiece, each set of bent square rods having two rods symmetrically distributed; a locking base plate is installed at one end of each bent square rod, a locking square tube is provided on the side of the locking base plate near the workpiece, the locking square tube is also provided with an edge-fitting adapter unit, the edge-fitting adapter unit is used to clamp workpieces with complex shapes; a U-shaped base plate is installed on the side of the locking base plate, a bidirectional lead screw is provided on the inner opposite side of the U-shaped base plate, a stop-balance structure is provided on the bidirectional lead screw, the stop-balance structure is used to limit the position of the workpiece.

[0006] Preferably, the edge-fitting unit includes an air outlet cylinder disposed on the locking square cylinder, and the two are connected; the output ends of the two air outlet cylinders at the two bent square rods of each group are arranged opposite to each other; the output end of the air outlet cylinder is slidably connected to a guide cylinder, and a pressure U-shaped seat is installed at the end of the guide cylinder away from the locking square cylinder, and a pressure wheel is connected inside the pressure U-shaped seat; a guide tooth column is also installed on the pressure U-shaped seat, and a guide base is slidably connected to the guide tooth column, and the guide base is fixedly connected to the locking base plate; a guide gear is meshed with the guide tooth column, and the guide gear is installed at the middle position of the bidirectional lead screw; a guide spring is sleeved on the guide tooth column, one end of the guide spring is connected to the pressure U-shaped seat, and the other end is connected to the guide base.

[0007] Preferably, an auxiliary U-shaped seat is installed on the bent square rod, and an auxiliary sliding column is connected to the internal opposite surfaces of the auxiliary U-shaped seat. An auxiliary base plate is slidably connected to the auxiliary sliding column, and a pressure-bearing inclined block is installed on the top of the auxiliary base plate. The inclined surface of the pressure-bearing inclined block is away from the workpiece and faces the pressure-applying wheel. The inclined surface of the pressure-bearing inclined block is located on the moving path of the pressure-applying wheel. An auxiliary spring is sleeved on the auxiliary sliding column, one end of which is fixedly connected to the auxiliary U-shaped seat, and the other end is fixedly connected to the auxiliary base plate.

[0008] Preferably, the heat-resistant box is equipped with a drive motor, the output end of which passes through the top of the heat-resistant box and is connected to a drive gear; the drive gear meshes with two symmetrical positioning gears, and a positioning column is provided on the top side of the positioning gear away from the drive gear; the top of the positioning gear is also provided with a matrix horizontal block, and the top of the matrix horizontal block is provided with a through matrix horizontal groove, which slides with the positioning column; the opposite sides of the two matrix horizontal blocks are respectively connected to two sets of bent square rods; a positioning rotating shaft is installed on the positioning gear, and a positioning base is installed on the positioning rotating shaft, which is fixedly connected to the heat-resistant box.

[0009] Preferably, two symmetrical positioning sliding posts are also installed on the side of the matrix block, and a first base plate is slidably connected to the positioning sliding posts. The first base plate is fixedly connected to the heat-proof box. A locking column is slidably connected to the locking cylinder. A locking block is installed at the end of the locking column near the workpiece. A rubber buffer pad is also provided on the locking block. The side wall of the workpiece is located on the moving path of the rubber buffer pad. A locking spring is also provided inside the locking cylinder. One end of the locking spring is fixedly connected to the inner bottom surface of the locking cylinder, and the other end is fixedly connected to the end point of the locking column located inside the locking cylinder.

[0010] Preferably, the pressure-bearing block has a pressure-bearing base block on the side away from the pressure-applying wheel, and the pressure-bearing base block has several sets of deformation fitting parts; each set of deformation fitting parts includes a limiting cylinder, which is connected through the pressure-bearing base block to the side near the workpiece, and the two are slidably engaged; a retaining semi-ring block is installed at the end of the limiting cylinder near the workpiece, and a rubber bladder is provided inside the retaining semi-ring block, with the side wall of the workpiece located on the moving path of the rubber bladder; a limiting spring is sleeved on the limiting cylinder, with one end of the limiting spring fixedly connected to the retaining semi-ring block and the other end fixedly connected to the pressure-bearing base block.

[0011] Preferably, the pressure-bearing base block is further provided with a pressure-driven gas-generating mechanism; the pressure-driven gas-generating mechanism includes a fixed frame fixedly set on the pressure-bearing base block, a gas-generating box installed in the fixed frame, the gas-generating box being located on the side of the pressure-bearing base block away from the workpiece; the opening of the gas-generating box facing the workpiece; a pressure-driven square plate is slidably connected inside the gas-generating box, and pressure-driven square columns with the same number and position as the limiting cylinders are also installed on the side of the pressure-driven square plate near the workpiece, the pressure-driven square columns being located on the moving path of the limiting cylinders.

[0012] Preferably, the gas generating box is further provided with several braking springs, one end of which is fixedly connected to the side of the pressing plate away from the workpiece, and the other end is fixedly connected to the inner bottom surface of the gas generating box; two high-pressure gas supply pipes are also symmetrically installed on the side of the gas generating box away from the workpiece, one high-pressure gas supply pipe is located at the top of the gas generating box and its output end faces the top of the workpiece; the other high-pressure gas supply pipe is located at the bottom of the gas generating box and its output end faces the bottom of the workpiece.

[0013] Preferably, the stop balance structure includes two stop blocks symmetrically mounted on a bidirectional lead screw, and the two stop blocks are slidably connected to a stop slide column. The two ends of the stop slide column are fixedly connected to the inner opposite surfaces of the U-shaped base plate. The two stop blocks are located at the top and bottom of the workpiece, respectively.

[0014] Preferably, a second base plate is installed on each of the two stop blocks, an elastic column is connected to the opposite surface of each of the two second base plates, and a stop rubber block is connected to the opposite end of each of the two elastic columns. The top and bottom of the workpiece are respectively located on the moving path of the two stop rubber blocks.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) The pressure-bearing base block moves, and under the action of the limiting cylinder and the limiting spring, it drives the fixed semi-ring block to move, so that the rubber bladder on it contacts the irregular side wall of the workpiece. As the pressure-bearing base block continues to move, the limiting spring is in a buffer state, thereby continuously applying pressure to the rubber bladder. Due to the good flexibility of the rubber bladder, it changes its shape under a certain pressure, so that the side wall of the rubber bladder fits the irregular side wall of the workpiece. It can bend and stretch according to the shape of the side wall, so that the rubber bladder completely fits the side wall of the workpiece, that is, fits the contour of the workpiece, thus effectively clamping the workpiece. There are several rubber bladders, which are distributed on the left and right side walls of the workpiece. Furthermore, the rubber bladder fits snugly against the sidewall of the irregular workpiece, allowing the equipment to clamp and hold complex-shaped workpieces within the furnace for tempering. This avoids the need to change to different matching clamps when tempering different workpieces, reducing the workload of the operators and overcoming the equipment's lack of flexibility in handling metal workpieces of different shapes. It enables the equipment to clamp workpieces of various shapes, reducing the limitations of the equipment in use. By clamping the workpiece within the furnace for tempering, factors such as shaking do not affect the tempering effect, thus improving the tempering quality of the workpiece and the overall performance of the equipment.

[0017] (2) Under the action of two sets of bent square bars, the locking plate moves towards the workpiece, and under the action of the locking square tube, locking square column and locking spring, it moves the locking block, bringing it close to the side wall of the workpiece and making it contact with it. Thus, both ends of the left and right sides of the workpiece are in contact with the locking block, thereby positioning the workpiece in the current position. This avoids the workpiece shaking due to the heat wave caused by the internal hot air circulation during the tempering process, and improves the stability of the workpiece during tempering, thus improving the tempering effect. The rubber buffer pad also increases the friction between the locking block and the workpiece when they contact each other, preventing the workpiece from dislodging during the tempering process. At the same time, the elasticity of the rubber buffer pad can absorb the impact force generated by the heat wave encountered by the workpiece during the tempering process, preventing the workpiece from being damaged in the early tempering stage, improving the tempering efficiency of the workpiece and the use effect of the equipment.

[0018] (3) Since the threads at both ends of the double-acting screw are opposite, the two stop blocks connected by the threads move at the upper limit of the stop slide column, so that the two stop blocks move relative to each other. Under the action of the second base plate and the elastic column, the stop rubber blocks move, so that the stop rubber blocks around the bottom and top of the workpiece move towards the workpiece, thereby limiting the overall position of the workpiece and preventing the workpiece from dislodging or shaking during the tempering process, thus improving the tempering effect of the workpiece. At the same time, this operation is performed after the workpiece is positioned on both sides, so that the workpiece can be limited and positioned in multiple directions. The stop rubber blocks around the bottom of the workpiece can also support the workpiece, improving the use effect of the equipment. Through the buffer provided by the several elastic columns, the workpieces of different thicknesses can also be positioned, and the impact force on the workpiece during tempering can be reduced, thus improving the tempering effect of the workpiece and reducing the limitations of the equipment during use.

[0019] (4) Due to the complex shape of the workpiece, i.e. the irregular edges, the contact time between the locking blocks and the workpiece is different. When one locking block contacts the workpiece, the other three have not yet contacted the workpiece. At this time, by continuing to operate the locking blocks to move, the locking block that has contacted the workpiece cannot continue to move and is thus limited here. This causes the locking column on the locking block to move within the locking tube, so that the locking spring is in a buffer state until the remaining locking blocks contact the side wall of the workpiece. This allows the workpiece to be limited around its perimeter, effectively clamping workpieces of different shapes, reducing the workload of the workers, and reducing the limitations of the equipment during use.

[0020] (5) After the workpiece is tempered, the limit on the matrix horizontal block needs to be released. Then, the drive motor is started again to drive the drive gear to rotate, so that the positioning column continues to move on the matrix horizontal groove, so that the two matrix horizontal blocks move away from each other. That is, the positioning toothed plate continues to rotate half a circle. When the positioning toothed plate rotates one circle, the two matrix horizontal blocks complete one relative and opposite movement. The first half circle is to limit the workpiece, and the second half circle is to release the limit on the workpiece, so that the locking block moves away from the workpiece, thereby releasing the limit setting on the workpiece, so that the workpiece can be taken out of the furnace normally. The drive motor only needs to rotate in one direction to make the locking block complete the operation of limiting or releasing the workpiece. This avoids the use of a complex motor that is easy to damage when clamping the workpiece and cause the workpiece to dislodge. Using a unidirectional drive motor, due to its simple structure, not only has a lower cost, but also high reliability, good stability and simple control, which improves the clamping effect of the workpiece, so that the workpiece can be tempered stably in the furnace, thereby further reducing the limitations of the equipment when in use and improving the tempering effect of the metal workpiece.

[0021] (6) As the pressure base continues to move, it drives the gas generating box to move. At this time, the limiting cylinder cannot continue to move, so that the distance between the limiting cylinder and the pressing plate in the gas generating box becomes smaller and smaller and they come into contact. The pressing plate moves within the gas generating box, so that the braking spring is in a buffer state. The gas inside the gas generating box is pressurized and flows out through two high-pressure gas pipes. The high-pressure gas acts on the top and bottom of the workpiece, thereby removing the impurities adhering to the workpiece and preventing the impurities adhering to the workpiece from affecting the tempering effect of the workpiece, thus improving the tempering quality of the workpiece. It is worth mentioning that after the workpiece tempering operation is completed, the distance between the pressing plate and the limiting cylinder in the gas generating box gradually increases. The braking spring resets and drives the pressing plate to reset and move within the gas generating box, thereby generating suction. The gas generating box can draw external gas into the gas generating box through the high-pressure gas pipe, and the heat around the workpiece can be drawn into the gas generating box to accelerate the cooling operation of the workpiece and improve the tempering effect of the equipment. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0023] In the attached diagram:

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the heat-resistant box structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the matrix transverse groove structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the internal structure of the furnace body of the present invention;

[0028] Figure 5 This is a schematic diagram of the positioning column structure of the present invention;

[0029] Figure 6 This is a cross-sectional view of the gas-generating box of the present invention;

[0030] Figure 7 This is a schematic diagram of the support frame structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the guide tooth column structure of the present invention;

[0032] Figure 9 This is a cross-sectional view of the high-pressure gas transmission pipeline of the present invention;

[0033] Figure 10This is a schematic diagram of the pressure-bearing base block structure of the present invention;

[0034] Figure 11 This is a schematic diagram of the rubber bladder structure of the present invention;

[0035] In the diagram: 1. Furnace body; 2. Support frame plate; 3. Heatproof box; 4. Positioning base plate; 5. Bending square rod; 6. Locking base plate; 7. Locking square tube; 8. U-shaped base plate; 9. Bidirectional lead screw; 10. Gas outlet cylinder; 11. Guide cylinder; 12. Pressure U-shaped seat; 13. Pressure wheel; 14. Guide gear column; 15. Guide base; 16. Guide gear; 17. Guide spring; 18. Auxiliary U-shaped seat; 19. Auxiliary sliding column; 20. Auxiliary base plate; 21. Pressure inclined block; 22. Auxiliary spring; 23. Drive motor; 24. Drive gear; 25. Positioning gear plate; 26. Positioning column; 27. Matrix 28. Matrix transverse groove; 29. ​​Positioning pivot; 30. Positioning base; 31. Positioning slide column; 32. First base plate; 33. Locking square column; 34. Locking square block; 35. Rubber buffer pad; 36. Locking spring; 37. Pressure bearing base block; 38. Limiting cylinder; 39. Fixing semi-ring block; 40. Rubber bladder; 41. Limiting spring; 42. Fixing frame; 43. Gas generating square box; 44. Pressing square plate; 45. Pressing square column; 46. Braking spring; 47. High-pressure gas transmission pipe; 48. Stopping square block; 49. Stopping slide column; 50. Second base plate; 51. Elastic column; 52. Stopping rubber block. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] Implementation examples, by Figures 1 to 11The present invention includes a furnace body 1; a support frame plate 2 is provided inside the furnace body 1, and a heat-proof box 3 is provided on the top of the support frame plate 2. A locking and positioning device is provided on the heat-proof box 3 for positioning the workpiece around its perimeter, with the workpiece located on the top of the heat-proof box 3; positioning base plates 4 are also installed on both sides of the heat-proof box 3, and the workpiece is placed on the positioning base plates 4; the locking and positioning device further includes two sets of bent square rods 5 located on both sides of the workpiece, with two bent square rods 5 in each set and symmetrically distributed; a locking base plate 6 is installed at one end of each bent square rod 5, and the locking base plate 6 is close to the workpiece. A locking square tube 7 is provided on one side of the workpiece, and an edge-fitting adapter unit is also provided on the locking square tube 7. The edge-fitting adapter unit is used to clamp workpieces with complex shapes. A U-shaped base plate 8 is installed on the side of the locking base plate 6. A bidirectional lead screw 9 is provided on the inner opposite side of the U-shaped base plate 8. A stop and balance structure is provided on the bidirectional lead screw 9. The stop and balance structure is used to limit the position of the workpiece. A drive motor 23 is provided inside the heatproof box 3. The output end of the drive motor 23 passes through the top of the heatproof box 3 and is connected to a drive gear 24. The drive gear 24 meshes with two symmetrical positioning gears 25 for positioning. A positioning column 26 is provided on the top side of the positioning gear 25 away from the drive gear 24; a matrix horizontal block 27 is also provided on the top of the positioning gear 25, and a through matrix horizontal groove 28 is provided on the top of the matrix horizontal block 27, which slides with the positioning column 26; the opposite sides of the two matrix horizontal blocks 27 are respectively connected to two sets of bent square rods 5; a positioning rotating shaft 29 is installed on the positioning gear 25, and a positioning base 30 is installed on the positioning rotating shaft 29, which is fixedly connected to the heat shield 3; two symmetrical positioning slides are also installed on the side of the matrix horizontal block 27. A first base plate 32 is slidably connected to the positioning slide column 31, and the first base plate 32 is fixedly connected to the heat-proof box 3; a locking square column 33 is slidably connected to the locking square cylinder 7, and a locking block 34 is installed at one end of the locking square column 33 near the workpiece. A rubber buffer pad 35 is also provided on the locking block 34, and the side wall of the workpiece is located on the moving path of the rubber buffer pad 35; a locking spring 36 is also provided inside the locking square cylinder 7, one end of the locking spring 36 is fixedly connected to the inner bottom surface of the locking square cylinder 7, and the other end is fixedly connected to the end point of the locking square column 33 located inside the locking square cylinder 7;

[0038] The metal workpiece to be tempered is placed on the positioning base plate 4 inside the furnace body 1 for tempering. At this time, the drive motor 23 is started, and its output end drives the drive gear 24 to rotate, which in turn meshes with the two positioning gear discs 25 to rotate synchronously. After rotating half a turn, the positioning column 26 on it slides in the matrix horizontal groove 28 on the matrix horizontal block 27. The initial position of the positioning column 26 is in the middle of the matrix horizontal groove 28, so that the two matrix horizontal blocks 27 move relative to each other. Under the action of the two sets of bent square rods 5, the locking plate 6 is driven to move towards the workpiece. Under the action of the locking square tube 7, the locking square column 33 and the locking spring 36, the locking square block 34 is driven to move, bringing it closer to the side wall of the workpiece. The workpiece is brought into contact with the locking block 34 on both sides, thus positioning it in its current position. This prevents the workpiece from shaking due to heat waves caused by internal hot air circulation during tempering, improving the stability of the workpiece during tempering and enhancing the tempering effect. The rubber buffer pad 35 further increases the friction between the locking block 34 and the workpiece, preventing the workpiece from dislodging during tempering. The elasticity of the rubber buffer pad 35 also absorbs the impact of the heat waves encountered by the workpiece during tempering, preventing damage to the workpiece in the early tempering stage and improving the tempering efficiency and equipment performance.

[0039] Because the workpiece has a complex shape with irregular edges, the contact time between the locking blocks 34 and the workpiece is not the same. When one locking block 34 contacts the workpiece, the other three have not yet contacted the workpiece. At this time, by continuing to operate the locking blocks 34 to move, the locking block 34 that has contacted the workpiece cannot move further and is thus limited there. This causes the locking post 33 on the locking block 34 to move within the locking tube 7, so that the locking spring 36 is in a buffer state until the remaining locking blocks 34 contact the side wall of the workpiece. This allows the workpiece to be limited around its perimeter, effectively clamping workpieces of different shapes, reducing the workload of the workers, and reducing the limitations of the equipment in use.

[0040] It is worth mentioning that once the matrix horizontal block 27 moves to its maximum position, the drive motor 23 can be stopped, allowing the locking block 34 to remain in its current position and preventing movement due to non-human factors. This also keeps the matrix horizontal block 27 in its current position. At this time, the positioning column 26 is in the middle of the matrix horizontal groove 28, while the positioning gear 25 has rotated half a turn. After the workpiece is tempered, the limit on the matrix horizontal block 27 needs to be released. Then, the drive motor 23 is restarted, causing it to continue driving the drive gear 24 to rotate. This causes the positioning column 26 to continue moving on the matrix horizontal groove 28, resulting in the two matrix horizontal blocks 27 moving in opposite directions. This means the positioning gear 25 continues to rotate half a turn. In other words, when the positioning gear 25 rotates one full turn, the two matrix horizontal blocks 27 complete one relative and phase rotation. The back-moving motion involves the first half-turn limiting the workpiece, and the second half-turn releasing the workpiece from the limit. This allows the locking block 34 to move away from the workpiece, thus releasing the workpiece from the furnace body 1. The drive motor 23 only needs to rotate in one direction for the locking block 34 to perform the limiting or releasing operation, avoiding the risk of damage and workpiece dislocation caused by using a complex motor. The unidirectional drive motor 23, with its simple structure, lower cost, high reliability, good stability, and simple control, improves the workpiece clamping effect, allowing the workpiece to be stably tempered within the furnace body 1. This further reduces the limitations of the equipment during use and improves the tempering effect of the metal workpiece.

[0041] The edge-fitting unit of this embodiment includes an air outlet cylinder 10 disposed on the locking square cylinder 7, and the two are connected; the output ends of the two air outlet cylinders 10 at the two bent square rods 5 of each group are arranged opposite to each other; the output end of the air outlet cylinder 10 is slidably connected to a guide cylinder 11, and a pressure U-shaped seat 12 is installed at the end of the guide cylinder 11 away from the locking square cylinder 7, and a pressure wheel 13 is connected inside the pressure U-shaped seat 12; a guide toothed column 14 is also installed on the pressure U-shaped seat 12, and a guide base is slidably connected to the guide toothed column 14. The guide base 15 is fixedly connected to the locking base plate 6; the guide tooth 14 is meshed with a guide gear 16, which is installed at the middle position of the bidirectional lead screw 9; a guide spring 17 is sleeved on the guide tooth 14, one end of which is connected to the pressure U-shaped seat 12, and the other end is connected to the guide base 15; an auxiliary U-shaped seat 18 is installed on the bent square rod 5, and an auxiliary sliding column 19 is connected to the internal opposite surfaces of the auxiliary U-shaped seat 18. An auxiliary base is slidably connected to the auxiliary sliding column 19. A pressure-bearing inclined block 21 is mounted on the top of the plate 20 and the auxiliary base plate 20. The inclined surface of the pressure-bearing inclined block 21 is away from the workpiece and faces the pressure-applying roller 13. The inclined surface of the pressure-bearing inclined block 21 is located on the moving path of the pressure-applying roller 13. An auxiliary spring 22 is sleeved on the auxiliary sliding column 19. One end of the auxiliary spring 22 is fixedly connected to the auxiliary U-shaped seat 18, and the other end is fixedly connected to the auxiliary base plate 20. A pressure-bearing base block 37 is provided on the side of the pressure-bearing inclined block 21 away from the pressure-applying roller 13. Several sets of deformation are provided on the pressure-bearing base block 37. The fitting component includes a limiting cylinder 38, which is connected through the pressure base block 37 on the side near the workpiece, and the two are slidably engaged; a retaining semi-ring block 39 is installed at the end of the limiting cylinder 38 near the workpiece, and a rubber bladder 40 is provided inside the retaining semi-ring block 39, with the side wall of the workpiece located on the moving path of the rubber bladder 40; a limiting spring 41 is sleeved on the limiting cylinder 38, with one end of the limiting spring 41 fixedly connected to the retaining semi-ring block 39 and the other end fixedly connected to the pressure base block 37;

[0042] When the locking block 34 contacts the side wall of the workpiece, the continued movement of the matrix block 27 causes the locking column 33 to move within the locking cylinder 7, allowing the gas inside to enter the outlet cylinder 10 through the locking cylinder 7 and act on the guide column 11. This causes the guide column 11 to move the pressure U-shaped seat 12, which then moves at its limit on the guide base 15 via the guide toothed column 14. This keeps the guide spring 17 in a buffered state, allowing it to reset and move the locking block 34 back to its original position, facilitating the next clamping operation on the workpiece. The moving pressure roller 13 contacts the inclined surface of the pressure-bearing inclined block 21, causing it to move at the upper limit of the auxiliary slide column 19 via the auxiliary base plate 20. This puts the auxiliary spring 22 in a buffered state, thereby driving the pressure-bearing base block 37 to move. This causes several sets of deformable fitting parts on it to move closer to the workpiece. In other words, under the action of the limiting cylinder 38 and the limiting spring 41, the fixed semi-ring block 39 is driven to move, causing the rubber bladder 40 on it to contact the irregular side wall of the workpiece. As the pressure-bearing base block 37 continues to move, the limiting spring 41 is kept in a buffered state. This continuously applies pressure to the rubber bladder 40. Due to its good flexibility, the rubber bladder 40 changes its shape under pressure, allowing its sidewalls to conform to the irregular sidewalls of the workpiece. It can bend and stretch according to the shape of the sidewalls, ensuring that the rubber bladder 40 completely conforms to the workpiece's sidewalls, i.e., conforms to the workpiece's contour. This allows for effective clamping of the workpiece. Furthermore, the number of rubber bladders 40 is several, distributed on both the left and right sidewalls of the workpiece. Combined with the complete conformity of the rubber bladders to the irregular sidewalls of the workpiece, this allows the equipment to clamp and hold workpieces with complex shapes in the furnace for tempering. This avoids the need to change to matching clamps when tempering different workpieces, reducing the workload of operators and overcoming the equipment's lack of flexibility in handling metal workpieces of different shapes. It enables the equipment to clamp workpieces of various shapes, reducing limitations in its use. This prevents factors such as shaking from affecting the tempering effect, improving the tempering quality of the workpiece and the overall performance of the equipment.

[0043] In this embodiment, the pressure-bearing base 37 is also provided with a pressure-operated gas-generating mechanism; the pressure-operated gas-generating mechanism includes a fixed frame 42 fixedly disposed on the pressure-bearing base 37, and a gas-generating box 43 installed inside the fixed frame 42, the gas-generating box 43 being located on the side of the pressure-bearing base 37 away from the workpiece; the opening of the gas-generating box 43 faces the workpiece; a pressure-operated square plate 44 is slidably connected inside the gas-generating box 43, and a pressure-operated square column 45 with the same number and position as the limiting cylinder 38 is also installed on the side of the pressure-operated square plate 44 near the workpiece, the pressure-operated square column 45 being positioned... On the moving path of the limiting cylinder 38; the gas generating box 43 is also provided with several braking springs 46, one end of the braking spring 46 is fixedly connected to the side of the pressing plate 44 away from the workpiece, and the other end is fixedly connected to the inner bottom surface of the gas generating box 43; two high-pressure gas supply pipes 47 are also symmetrically installed on the side of the gas generating box 43 away from the workpiece, one high-pressure gas supply pipe 47 is located at the top of the gas generating box 43 and the output end faces the top of the workpiece; the other high-pressure gas supply pipe 47 is located at the bottom of the gas generating box 43 and the output end faces the bottom of the workpiece.

[0044] When the rubber bladder 40 on the fixed semi-ring block 39 contacts the workpiece, it indicates that the workpiece needs to be clamped. As the pressure base block 37 continues to move, it drives the gas-generating box 43 to move. At this point, the limiting cylinder 38 cannot move further, causing the distance between the limiting cylinder 38 and the pressing plate 44 inside the gas-generating box 43 to decrease until they contact each other. This limits the movement of the pressing plate 44 within the gas-generating box 43, putting the braking spring 46 in a buffered state. This causes the gas inside the gas-generating box 43 to be pressurized and flow out through the two high-pressure gas pipes 47. The high-pressure gas acts on the top and bottom of the workpiece, thereby removing impurities adhering to the workpiece. The process of cleaning removes impurities from the workpiece, preventing them from affecting the tempering effect and improving the tempering quality. It's worth noting that after the tempering operation is complete, the distance between the pressing plates 44 and the limiting cylinders 38 within the gas generating box 43 gradually increases. The resetting of the brake spring 46 causes the pressing plates 44 to move back to their original positions within the gas generating box 43, generating suction. This suction allows the gas generating box 43 to draw in external gas through the high-pressure gas pipe 47, drawing heat from the workpiece's surroundings into the gas generating box 43 to accelerate cooling and improve the tempering effect.

[0045] The stop and balance structure of this embodiment includes two stop blocks 48 symmetrically mounted on a bidirectional lead screw 9. The two stop blocks 48 are slidably connected to a stop column 49. The two ends of the stop column 49 are fixedly connected to the inner opposite surfaces of the U-shaped base plate 8. The two stop blocks 48 are located at the top and bottom of the workpiece, respectively. A second base plate 50 is mounted on each of the two stop blocks 48. An elastic column 51 is connected to the opposite surface of each of the two second base plates 50. A stop rubber block 52 is connected to the opposite end of each of the two elastic columns 51. The top and bottom of the workpiece are located on the movement paths of the two stop rubber blocks 52, respectively.

[0046] When the guide pinion 14 moves, it drives the meshing guide gear 16 to rotate, causing the bidirectional lead screw 9 on it to rotate. Since the threads at both ends of the bidirectional lead screw 9 are opposite, the two threaded stop blocks 48 move at the upper limit of the stop slide 49, causing the two stop blocks 48 to move relative to each other. Under the action of the second base plate 50 and the elastic column 51, the stop rubber blocks 52 move, causing the stop rubber blocks 52 around the bottom and top of the workpiece to move towards the workpiece, thereby limiting the overall position of the workpiece and preventing the workpiece from dislodging or shaking during tempering, thus improving the tempering effect of the workpiece. At the same time, this operation is performed after the workpiece is positioned on both sides, allowing the workpiece to be limited and positioned in multiple directions. The stop rubber blocks 52 around the bottom of the workpiece can also support the workpiece, improving the use effect of the equipment. Through the buffering provided by the several elastic columns 51, workpieces of different thicknesses can also be positioned, and the impact force on the workpiece during tempering can be reduced, improving the tempering effect of the workpiece and reducing the limitations of the equipment during use.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressurized tempering furnace with hot air circulation, comprising a furnace body; characterized in that: The furnace body is equipped with a support frame plate, and a heat-proof box is installed on the top of the support frame plate. A locking and positioning device is installed on the heat-proof box to position the workpiece around its perimeter. The workpiece is located on the top of the heat-proof box. Positioning base plates are also installed on both sides of the heat-proof box, and the workpiece is placed on the positioning base plates. The locking and positioning device also includes two sets of bent square rods located on both sides of the workpiece, with two bent square rods in each set, symmetrically distributed. A locking base plate is installed at one end of each bent square rod. A locking square tube is provided on the side of the locking base plate closest to the workpiece, and an edge-fitting adapter unit is provided on the locking square tube for clamping workpieces with complex shapes. A U-shaped base plate is installed on the side of the locking base plate, and a bidirectional lead screw is provided on the opposite side of the U-shaped base plate. A stop-balance structure is provided on the bidirectional lead screw to limit the position of the workpiece. The edge-fitting unit includes an air outlet cylinder mounted on the locking square tube, and the two are connected. The output ends of the two air outlet cylinders at the two bent square rods of each group are arranged opposite each other. A guide cylinder is slidably connected to the output end of the air outlet cylinder. A pressure U-shaped seat is installed at the end of the guide cylinder away from the locking square tube, and a pressure wheel is connected inside the pressure U-shaped seat. A guide tooth column is also installed on the pressure U-shaped seat, and a guide base is slidably connected to the guide tooth column. The guide base is fixedly connected to the locking base plate. The guide tooth column is engaged with guide teeth. A guide gear is installed at the middle position of the double-acting lead screw; a guide spring is sleeved on the guide tooth column, one end of the guide spring is connected to the pressure U-shaped seat, and the other end is connected to the guide base; an auxiliary U-shaped seat is installed on the bent square rod, and an auxiliary sliding column is connected to the internal opposite surfaces of the auxiliary U-shaped seat. An auxiliary base plate is slidably connected to the auxiliary sliding column, and a pressure-bearing inclined block is installed on the top of the auxiliary base plate. The inclined surface of the pressure-bearing inclined block is away from the workpiece and faces the pressure wheel; a drive motor is installed inside the heat-proof box, and the output end of the drive motor passes through the heat-proof box. A drive gear is connected to the top of the device; the drive gear meshes with two symmetrical positioning gears, and a positioning column is provided on the side of the top of the positioning gear away from the drive gear; a matrix horizontal block is also provided on the top of the positioning gear, and a through matrix horizontal groove is provided on the top of the matrix horizontal block, which slides with the positioning column; the opposite sides of the two matrix horizontal blocks are respectively connected to two sets of bent square rods; a positioning shaft is installed on the positioning gear, and a positioning base is installed on the positioning shaft, and the positioning base is fixedly connected to the heat-resistant box; the pressure-bearing inclined... A pressure-bearing base block is provided on the side of the block away from the pressure-applying wheel. Several sets of deformation fitting components are provided on the pressure-bearing base block. Each set of deformation fitting components includes a limiting cylinder, which is connected through the pressure-bearing base block to the side near the workpiece, and the two are slidably engaged. A retaining semi-ring block is installed at the end of the limiting cylinder near the workpiece. A rubber bladder is provided inside the retaining semi-ring block, and the side wall of the workpiece is located on the moving path of the rubber bladder. A limiting spring is sleeved on the limiting cylinder. One end of the limiting spring is fixedly connected to the retaining semi-ring block, and the other end is fixedly connected to the pressure-bearing base block. Start the drive motor, causing its output to drive the drive gear to rotate, which in turn makes the two positioning gears rotate synchronously. After rotating half a turn, the positioning column on the gear slides in the matrix groove on the matrix block. The initial position of the positioning column is in the middle of the matrix groove, which causes the two matrix blocks to move relative to each other. Under the action of the two sets of bent square bars, the locking plate moves towards the workpiece. Under the action of the locking square tube, locking square column and locking spring, the locking block moves close to the side wall of the workpiece and contacts it, so that both ends of the left and right sides of the workpiece are in contact with the locking block, thereby positioning the workpiece in the current position.

2. The pressurized tempering furnace with hot air circulation according to claim 1, characterized in that: Two symmetrical positioning sliding columns are also installed on the side of the matrix block. A first base plate is slidably connected to the positioning sliding column, and the first base plate is fixedly connected to the heat-proof box. A locking column is slidably connected to the locking cylinder. A locking block is installed at the end of the locking column near the workpiece. A rubber buffer pad is also provided on the locking block. The side wall of the workpiece is located on the moving path of the rubber buffer pad. A locking spring is also provided inside the locking cylinder. One end of the locking spring is fixedly connected to the inner bottom surface of the locking cylinder, and the other end is fixedly connected to the end point of the locking column located inside the locking cylinder.

3. A pressurized tempering furnace with hot air circulation according to claim 2, characterized in that: The inclined surface of the pressure block is located on the moving path of the pressure wheel; an auxiliary spring is sleeved on the auxiliary slide column, one end of the auxiliary spring is fixedly connected to the auxiliary U-shaped seat, and the other end is fixedly connected to the auxiliary base plate.

4. A pressurized tempering furnace with hot air circulation according to claim 3, characterized in that: The pressure-bearing base block is also provided with a pressure-driven gas-generating mechanism; the pressure-driven gas-generating mechanism includes a fixed frame fixedly set on the pressure-bearing base block, a gas-generating box installed in the fixed frame, the gas-generating box being located on the side of the pressure-bearing base block away from the workpiece; the opening of the gas-generating box facing the workpiece; a pressure-driven square plate is slidably connected inside the gas-generating box, and pressure-driven square columns with the same number and position as the limiting cylinders are also installed on the side of the pressure-driven square plate near the workpiece, the pressure-driven square columns being located on the moving path of the limiting cylinders.

5. A pressurized tempering furnace with hot air circulation according to claim 4, characterized in that: The gas generating box is also equipped with several braking springs. One end of the braking spring is fixedly connected to the side of the pressing plate away from the workpiece, and the other end is fixedly connected to the inner bottom surface of the gas generating box. Two high-pressure gas supply pipes are also symmetrically installed on the side of the gas generating box away from the workpiece. One high-pressure gas supply pipe is located at the top of the gas generating box and its output end faces the top of the workpiece. The other high-pressure gas supply pipe is located at the bottom of the gas generating box and its output end faces the bottom of the workpiece.

6. A pressurized tempering furnace with hot air circulation according to claim 1, characterized in that: The stop balance structure includes two stop blocks symmetrically mounted on a bidirectional lead screw. The two stop blocks are slidably connected to a stop column, and the two ends of the stop column are fixedly connected to the inner opposite surfaces of the U-shaped base plate. The two stop blocks are located at the top and bottom of the workpiece, respectively.

7. A pressurized tempering furnace with hot air circulation according to claim 6, characterized in that: A second base plate is installed on each of the two stop blocks, and an elastic column is connected to the opposite side of each of the two second base plates. A stop rubber block is connected to the opposite end of each of the two elastic columns, and the top and bottom of the workpiece are respectively located on the moving path of the two stop rubber blocks.

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