Heating furnace and quenching straightening machine

Abstract

The invention relates to the technical field of machining, in particular to a heating furnace which is used for conducting heat treatment on workpieces, the heating furnace comprises a furnace body and a rotary disc rotatably arranged in the furnace body, and a heating piece is arranged at the position, located on the side portion of the rotary disc, in the heating furnace; a plurality of loading holes are formed in the rotary disc and are uniformly arranged in the circumferential direction of the rotary disc, the two ends of each loading hole penetrate through the two opposite end faces of the rotary disc respectively, and one workpiece is located in one loading hole; an upper inlet and a lower inlet are formed in the side face of the furnace body, the lower inlet penetrates through the two opposite side walls of the furnace body in the direction that a workpiece is pushed into the heating furnace, the upper inlet right faces one loading hole, the lower inlet right faces the other loading hole, the heating furnace further comprises a ratchet wheel rotating mechanism, and the ratchet wheel rotating mechanism is installed on a rotary disc. The ratchet wheel rotating mechanism drives the rotary disc to perform one-way intermittent rotation according to the central angle alpha; the invention further provides a quenching straightening machine with the heating furnace.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a heating furnace and a quenching and straightening machine. Background Art

[0002] Slender shafts are often used as precision parts such as linear guides, piston rods and linear shafts. They need to have high surface hardness and straightness to meet the needs of use. However, the slender shafts themselves have poor rigidity and are easily affected by factors such as cutting force and cutting heat during machining, resulting in deformation. Therefore, the slender shafts need to be heat treated after machining to improve their comprehensive mechanical properties and alleviate deformation. Common manufacturers will stack a large number of slender shafts together and place them directly in a heating furnace for unified heat treatment. Although this has high machining efficiency, the close stacking of workpieces can easily lead to uneven heating. The workpieces on the outer surface have a good heating effect, while the workpieces on the inside are heated slowly and dissipate heat slowly, which leads to overall uneven heating and affects product quality.

[0003] In order to solve the above technical problems, Chinese patent CN112593064A discloses a rod-type spiral propulsion heating furnace, including a heating furnace, a spiral conveying blade, a rotating shaft and a base; the front and rear side walls of the heating furnace are through-opened with a loading port; the right discharge end of the heating furnace is through-opened with a discharge port; the interior of the heating furnace is evenly spaced and vertically symmetrically fixed with a slide rail support seat; the upper surface of the slide rail support seat is horizontally fixed with a slide rail; a slider is installed on the slide rail; when in use, the workpiece is placed on the slider and the spiral conveying blade from the left side of the loading port, and the product starts to rotate and heat inside the heating furnace under the drive of the rotating shaft, and finally the heated product will fall on the unloading roller, and the unloading roller will convey the product out of the discharge port under the drive of the rotation of the rotating shaft. This patent uses a rolling method to ensure the uniformity of product heating, but there is no protection measure and limit device for the transmission of the product. The heated product is prone to deformation or even damage by free falling, which affects the product quality.

[0004] Therefore, it is necessary for those skilled in the art to provide a heating furnace to achieve uniform heating of slender shaft components and improve processing quality and production efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a heating furnace and a quenching and straightening machine to solve the technical problem in the prior art that when heat treating a slender shaft, stacking of workpieces easily leads to close contact and uneven heating, thereby affecting the heat treatment effect.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a heating furnace for heat treatment of workpieces, the heating furnace comprising a furnace body and a turntable rotatably arranged in the furnace body, a heating element is arranged on the side of the turntable in the heating furnace; a plurality of loading holes are provided on the turntable, the plurality of loading holes are evenly arranged along the circumference of the turntable, the two ends of the loading holes respectively pass through the two opposite end surfaces of the turntable, and one of the workpieces is located in one loading hole; an upper entrance and a lower entrance are provided on the side of the furnace body, the lower entrance passes through the opposite side walls of the furnace body along the direction in which the workpiece is pushed into the heating furnace, the upper entrance is opposite to one loading hole, and the lower entrance is opposite to the other loading hole.

[0007] Furthermore, the number of the loading holes on the turntable is N (N≥2, and N is an integer), and the central angle α between two adjacent loading holes is (360 / N)°.

[0008] Furthermore, a first feeding compression cylinder and a second feeding compression cylinder are provided outside the furnace body, and a first feeding shaft in the shape of a slender rod is formed at the output end of the first feeding compression cylinder, and a second feeding shaft in the shape of a slender rod is formed at the output end of the second feeding compression cylinder, and the second feeding shaft is located below the first feeding shaft; the first feeding shaft is opposite to the upper inlet, and the second feeding shaft is opposite to the lower inlet.

[0009] Furthermore, the heating element is composed of a combination of heating rods, and the heating power of the heating element is 5 to 10 kw / h.

[0010] Furthermore, the heating furnace also includes a ratchet rotating mechanism, which is installed on a turntable. The ratchet rotating mechanism includes a main shaft and a ratchet mechanism assembly installed on the main shaft. The main shaft is rotatably arranged in the furnace body, and the turntable is fixed relative to the main shaft.

[0011] Furthermore, both ends of the main shaft extend to opposite sides of the furnace body respectively, an outer cooling fixed sleeve is cooperatively connected between the main shaft and the furnace body, an inner cooling fixed sleeve is fixedly connected to the end of the main shaft, and cooling water is passed through both the outer cooling fixed sleeve and the inner cooling fixed sleeve.

[0012] Furthermore, a connecting sleeve is provided on the fixed sleeve at the end of the main shaft, and a driven sleeve is detachably connected to one end face of the connecting sleeve, and a driving wheel and an active sleeve are connected to the driven sleeve; the ratchet mechanism assembly includes a ratchet and a pawl, the ratchet is cooperatively connected to the active sleeve, the pawl is installed on the driving wheel, and the pawl abuts the ratchet and drives the ratchet to rotate in one direction.

[0013] Furthermore, a first downward pressure cylinder and a first locking cylinder are rotatably provided on the side of the furnace body; the telescopic end of the first downward pressure cylinder is rotatably connected to a downward pressure arm, and the downward pressure arm is fixedly connected to the driving wheel; the pawl is rotatably connected to the downward pressure arm, and a compression spring is provided between the top of the pawl and the downward pressure arm.

[0014] Furthermore, a limit gear is formed in the circumferential direction of the active sleeve, and a locking chuck is connected to the telescopic end of the first locking cylinder, and the locking chuck is engaged and connected between the teeth of the limit gear.

[0015] A quenching and straightening machine, comprising the heating furnace described in any of the above items, and further comprising a feeding assembly and a quenching and straightening assembly, wherein the feeding assembly and the quenching and straightening assembly are respectively located on opposite sides of the heating furnace, the feeding assembly feeds the workpiece into the heating furnace from the upper entrance, and pushes the workpiece from the heating furnace into the quenching and straightening assembly through the lower entrance.

[0016] The beneficial effects of the present invention are:

[0017] The heating furnace performs heat treatment on the workpieces, and utilizes separately arranged loading holes to separate the workpieces from each other, thereby reducing problems such as overlapping and close contact, and improving product quality and production efficiency. At the same time, the heating furnace has good sealing and heating effects, effectively realizes uniform heating, and ensures that the temperature difference between each workpiece is no more than 3°C, further improving product quality; the ratchet transmission mechanism realizes precise control of the rotation angle of the turntable, and adopts a ratchet mechanism assembly to ensure that the turntable realizes unidirectional intermittent rotation, so that the workpieces can be loaded into the loading holes in sequence, and at the same time ensures that the first feeding shaft and the second feeding shaft can be accurately inserted into the loading holes, thereby improving the stability of loading and unloading, and facilitating production use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a stereoscopic diagram of a quenching and straightening machine of the present invention.

[0019] Figure 2 yes Figure 1 Another direction of the stereogram.

[0020] Figure 3 It is a stereoscopic diagram of a feeding assembly in a quenching and straightening machine.

[0021] Figure 4 It is an exploded view of the feeding assembly in a quenching and straightening machine.

[0022] Figure 5 yes Figure 3 main view.

[0023] Figure 6 yes Figure 5 Section view along AA.

[0024] Figure 7 yes Figure 6 Isometric diagram of .

[0025] Figure 8It is a three-dimensional diagram of a heating furnace in a quenching and straightening machine.

[0026] Fig. 9 yes Figure 2 A partial enlarged schematic diagram of area A in the middle.

[0027] Fig.10 yes Figure 8 Right view of .

[0028] Fig.11 yes Fig.10 Cross-sectional view along BB.

[0029] Fig.12 yes Fig.10 Cross-sectional view along CC.

[0030] Fig.13 yes Fig.12 Isometric diagram of .

[0031] Fig.14 yes Figure 8 Schematic diagram of the three-dimensional (omit the furnace body)

[0032] Fig.15 yes Fig.14 Schematic diagram of the explosion in the other direction.

[0033] Fig.16 yes Fig.12 A partial enlarged schematic diagram of the C area in the middle.

[0034] Fig.17 yes Fig.13 A partial enlarged schematic diagram of area E in the middle.

[0035] Fig.18 yes Fig.12 A partial enlarged schematic diagram of area D in the middle.

[0036] Fig.19 yes Figure 2 A partial enlarged schematic diagram of area B in the middle.

[0037] Fig. 20 It is a stereoscopic diagram of a quenching and straightening assembly in a quenching and straightening machine.

[0038] Fig.21 yes Fig. 20 Top view of the .

[0039] Fig. 22 yes Fig. 20 main view.

[0040] Fig.23 yes Fig.21 Cross-sectional view along DD.

[0041] Fig.24 yes Fig. 22 Cross-sectional view along EE.

[0042] Fig.25 yes Fig.24 Isometric diagram of .

[0043] Fig.26 yes Fig. 20 Schematic diagram of the explosion.

[0044] Fig. 27 yes Fig.24 A partial enlarged schematic diagram of the F area in the middle.

[0045] Fig.28 yes Fig.26 A partial enlarged schematic diagram of the middle H area.

[0046] Fig.29 yes Fig.25 A partial enlarged schematic diagram of the middle G area.

[0047] Fig.30 It is a stereoscopic view of a discharge assembly in a quenching and straightening machine.

[0048] Fig.31 yes Fig.30 Top view of the .

[0049] Fig.32 yes Fig.30 Cross-sectional view along the middle line FF.

[0050] Fig.33 yes Fig.30 Schematic diagram of the explosion.

[0051] The components in the attached drawings are marked as follows: 1. Heating furnace; 10. Furnace body; 108. Upper inlet; 109. Lower inlet; 11. Insulation layer; 12. Heating element; 13. Turntable; 131. Loading hole; 14. Lower bracket; 15. Upper bracket; 2. Feeding assembly; 20. Frame bracket; 21. Loading box; 210. Connecting rod; 211. Cam; 22. Auxiliary box; 23. Top plate; 231. Slider; 24. First motor; 25. Loading plate; 251. Limiting plate; 252. Guide plate; 26. Baffle; 27. Guide plate; 271. Track; 28. First feeding compression cylinder; 281. First A feeding shaft; 29, a second feeding compression cylinder; 291, a second feeding shaft; 3, a quenching and straightening assembly; 30, a secondary shaft; 31, a straightening assembly; 310, a convex ring; 311, a left rotating shaft; 312, a right rotating shaft; 313, a profiling rod; 314, a clamping frame; 315, a profiling wheel; 316, a second downward pressure cylinder; 317, a stopper; 318, an adjusting spring; 319, a locking spring; 32, a transmission assembly; 321, a transmission motor; 322, a pulley; 323, a driving gear; 324, a driven gear; 325, a left driving gear; 326, a right driving gear; 327, a synchronous rotating sleeve; 32 8. Synchronous gear; 33. Driving assembly; 34. U-shaped bracket; 35. Mounting turntable; 351. First fixed seat; 352. Second fixed seat; 353. Spring bracket; 36. Discharge tray; 361. Opening; 37. Discharge assembly; 371. Second motor; 372. Discharge chute; 373. Rotating shaft; 374. Discharge chute; 375. Discharge bracket; 376. First sprocket; 377. First chain; 378. Second sprocket; 379. Second chain; 38. Heating device; 39. Loading pool; 4. Ratchet rotation mechanism; 40. Main shaft; 401. Connecting sleeve; 402. Driven sleeve ; 403, active sleeve; 41, external cooling fixed sleeve; 410, internal cooling fixed sleeve; 411, cooling cavity; 412, cooling deep hole; 413, first water inlet head; 414, first water outlet head; 415, second water inlet head; 416, second water outlet head; 42, ratchet mechanism assembly; 420, ratchet; 421, limit gear; 423, pawl; 43, driving wheel; 45, supporting shaft; 46, locking clamp; 47, pressing arm; 471, compression spring; 48, first pressing cylinder; 481, first suspension bracket; 49, first locking cylinder; 491, second suspension bracket; 5, workpiece. DETAILED DESCRIPTION

[0052] The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0053] See also Figure 1 , Figure 2The present invention provides a quenching and straightening machine for heating and straightening a slender shaft workpiece 5. The quenching and straightening machine comprises a feeding assembly 2, a heating furnace 1 and a quenching and straightening assembly 3. The feeding assembly 2 and the quenching and straightening assembly 3 are respectively located on opposite sides of the heating furnace 1. The feeding assembly 2 is used to automatically transport the workpiece 5 into the heating furnace 1. The heating furnace 1 performs heat treatment on the workpiece 5. The quenching and straightening assembly 3 is then used to quench and straighten the workpiece 5 after the heat treatment to complete the processing of the workpiece 5. The quenching and straightening machine described in the present invention uniformly plans a series of processes involved in the processing of the workpiece 5, such as feeding, heat treatment, quenching, straightening, and unloading, to achieve highly integrated, automated, and standardized processing and production, greatly improving the production efficiency and processing quality, and is suitable for large-scale production.

[0054] See also Figure 2 , Figure 3 , Figure 4 The feeding assembly 2 includes a frame-shaped bracket 20 with a frame structure, and a loading box 21 and a first feeding compression cylinder 28 are fixedly connected to the top surface of the frame-shaped bracket 20. When working, the workpiece 5 is placed in the loading box 21, and the output end of the first feeding compression cylinder 28 is used to push the workpiece 5 into the feeding port on the heating furnace 1 to complete the feeding process.

[0055] For further information, see Figure 2 , Figure 4 , Figure 6 The loading box 21 is a box structure with an open top surface, and the workpiece 5 is placed in the loading box 21 from the open surface of the loading box 21. A loading plate 25 is detachably connected to the frame-type bracket 20 near the loading box 21, and the loading plate 25 faces the inlet of the heating furnace 1; a slender rod-shaped first feeding shaft 281 is formed at the output end of the first feeding compression cylinder 28, and the first feeding shaft 281 is located on the upper plane of the loading plate 25, and the end of the first feeding shaft 281 faces the inlet of the heating furnace 1 and abuts the end face of the workpiece 5; when in use, the workpiece 5 in the loading box 21 can be moved from the loading box 21 to the top of the loading plate 25, and then the first feeding shaft 281 is used to push the workpiece 5 into the heating furnace 1.

[0056] In this embodiment, the cross section of the carrier plate 25 is V-shaped, so as to facilitate the placement of the workpiece 5 and ensure that the workpiece 5 can be accurately transferred to the feed port.

[0057] It can be understood that the first feeding compression cylinder 28 is a pneumatic cylinder or a hydraulic cylinder, which is not limited here.

[0058] Furthermore, a baffle 26 is detachably connected to the surface of the loading box 21 facing the loading plate 25, and a gap is left between the baffle 26 and the bottom wall of the loading box 21. The gap can allow the workpieces 5 on the bottom layer of the loading box 21 to pass through, and the workpieces 5 located above the bottom layer of the loading box will be blocked by the baffle 26, thereby ensuring that the workpieces 5 can pass through the gap in turn, preventing blockage and ensuring stability in use.

[0059] Furthermore, a limiting plate 251 is provided between the loading plate 25 and the baffle 26 , a guide plate 252 is connected between the top of the limiting plate 251 and the loading plate 25 , and a gap is formed between the side of the charging box 21 corresponding to the gap and the limiting plate 251 .

[0060] For further information, see Figure 5 , Figure 6 , Figure 7 The bracket 20 is provided with a sub-box 22 below the loading box 21. A guide plate 27 is fixedly connected to the surface of the sub-box 22 facing the loading plate 25. A top plate 23 is slidably provided on the guide plate 27. The top plate 23 and the limit plate 251 are parallel to each other. The top plate 23 is matched and arranged in the gap between the limit plate 251 and the loading box 21. The top of the top plate 23 can block the gap, so that the workpiece 5 in the loading box 21 rolls out of the gap and slides into the top of the top plate 23. A first motor 24 is fixedly connected to the bottom of the sub-box 22. When in use, the top plate 23 slides up and down along the guide plate 27 under the drive of the first motor 24.

[0061] In this embodiment, a slider 231 is provided on the top plate 23, a track 271 is provided on the guide plate 27, and the slider 231 is connected to the track 271. The present invention uses the slider 231 and the track 271 to reduce the contact area between the top plate 23 and the guide plate 27, thereby preventing frictional heating or wear, thereby ensuring the stability of the movement of the top plate 23. Furthermore, a dovetail groove is provided on the slider 231, and a dovetail boss is provided on the track 271. The dovetail groove is connected to the dovetail boss, thereby ensuring the stability of the sliding connection.

[0062] Specifically, a cam 211 is fixedly connected to the output shaft of the first motor 24, a connecting rod 210 is provided between the cam 211 and the top plate 23, and both ends of the connecting rod 210 are rotatably connected to the cam 211 and the top plate 23 respectively; when in use, the first motor 24 is started, and the cam 211 rotates driven by the output shaft of the first motor 24, thereby driving the end of the connecting rod 210 to rotate around the output shaft of the first motor 24, and the top plate 23 reciprocates driven by the connecting rod 210.

[0063] In this embodiment, bearings (not shown) are provided at both ends of the connecting rod 210 to ensure the stability of rotation. When the connecting rod 210 moves toward the direction of the first motor 24, the top plate 23 moves downward along the guide plate 27 and makes the top surface of the top plate 23 flush with the bottom surface of the loading box 21, and the workpiece 5 in the loading box 21 moves to the top surface of the top plate 23; when the connecting rod 210 moves toward the direction of the loading plate 25, the top plate 23 abuts against the workpiece 5 and moves together, thereby causing the workpiece 5 to move along the limit plate 251 to the upper surface of the guide plate 252 and then slide into the V-shaped structure of the loading plate 25, thereby realizing the movement of the workpiece 5 in the loading box 21 from the loading box 21 to the top of the loading plate 25, thereby completing the loading operation of the workpiece 5.

[0064] In this embodiment, the bottom surface of the loading box 21 is inclined, and the inclined surface is inclined toward the direction of the limit plate 251 to ensure the continuity of feeding; the top surface of the top plate 23 is inclined, and the inclined surface is inclined toward the direction of the limit plate 251, so that the workpiece 5 can stably roll down between the top plate 23 and the limit plate 251, thereby ensuring the stability during movement and improving the automation effect. In addition, the guide plate 252 is inclined so that the workpiece 5 can slide along the guide plate 252 to the carrier plate 25 when it is pushed against one end of the guide plate 252 by the top plate 23.

[0065] The specific operation method of the feeding assembly 2 is: placing the workpiece 5 in the loading box 21, the workpiece 5 automatically slides down and abuts the limit plate 251, starting the first motor 24, and the top plate 23 moves upward along the guide plate 27 driven by the first motor 24, and abuts the workpiece 5, so that the workpiece 5 moves to the top surface of the limit plate 251 and slides from the guide plate 252 to the V-shaped structure of the loading plate 25, starting the first feeding compression cylinder 28, and the first feeding shaft 281 of the first feeding compression cylinder 28 abuts the workpiece 5 and pushes it into the heating furnace 1 to complete the loading process.

[0066] The feeding assembly 2 has a high degree of automation. The top plate 23, driven by the first motor 24, will move up and down along the guide plate 27 in a cycle, thereby realizing automatic feeding. Only by manually adding the workpiece 5 into the loading box 21, the feeding and feeding processes can be automatically completed, reducing labor costs and improving production safety and production efficiency. At the same time, the present invention uses the slider 231 and the track 271 to cooperate to reduce the contact area between the top plate 23 and the guide plate 27, thereby preventing friction heating or wear, thereby ensuring the stability of the top plate 23 during movement.

[0067] See also Figure 2 , Figure 8 , Fig. 9 , Fig.11The heating furnace 1 includes a furnace body 10 with a square hollow structure. An upper inlet 108 and a lower inlet 109 are provided on the end surface of the furnace body 10 facing the feeding assembly 2. The lower inlet 109 passes through the two opposite side walls of the furnace body 10 along the direction in which the workpiece 5 is pushed into the heating furnace 1. The feeding assembly 2 also includes a second feeding compression cylinder 29. The cylinder body of the second feeding compression cylinder 29 is fixedly connected to the frame bracket 20. The output end of the second feeding compression cylinder 29 is formed with a second feeding shaft 291 in the shape of a slender rod. The second feeding shaft 291 is located below the first feeding shaft 281.

[0068] In this embodiment, the upper inlet 108 is the feed inlet on the heating furnace 1 .

[0069] It can be understood that the second feeding compression cylinder 29 is a pneumatic cylinder or a hydraulic cylinder, which is not limited here.

[0070] Furthermore, the first feeding shaft 281 is opposite to the upper entrance 108, and the second feeding shaft 291 is opposite to the lower entrance 109. When in use, the first feeding shaft 281 penetrates into the interior of the heating furnace 1 from the upper entrance 108, thereby pushing the workpiece 5 into the heating furnace 1, and the second feeding shaft 291 penetrates into the interior of the heating furnace 1 from the lower entrance 109 and passes through the front and back of the heating furnace 1, thereby pushing the workpiece 5 onto the quenching and straightening assembly 3.

[0071] In order to ensure that the heating furnace 10 can evenly heat the workpiece 5 and improve the continuity of loading-heat treatment-unloading, the present invention abandons the overall loading and unloading design in the prior art and instead loads the workpieces 5 one by one.

[0072] See also Fig. 9 , Fig.10 , Fig.11 , Fig.14 The heating furnace 10 is provided with a ratchet rotating mechanism 4 on the end surface facing the feeding assembly 2, a rotating disk 13 is rotatably provided in the heating furnace 10, the ratchet rotating mechanism 4 is mounted on the rotating disk 13, and a heating element 12 is provided on the side of the rotating disk 13 in the heating furnace 10; the ratchet rotating mechanism 4 controls the rotating disk 13 to rotate intermittently in one direction and uses the heating element 12 to uniformly heat the rotating disk 13. Preferably, the heating power of the heating element 12 is 5-10 kw / h.

[0073] Furthermore, a plurality of loading holes 131 are provided in the rotary disk 13 along the axial direction of the rotary disk 13, and the plurality of loading holes 131 are evenly arranged along the circumference of the rotary disk 13, and the two ends of the loading holes 131 respectively penetrate the two opposite end surfaces of the rotary disk 13. The upper inlet 108 faces one loading hole 131, and the lower inlet 109 faces another loading hole 131; when in use, the first feeding shaft 281 passes through the upper inlet 108 and is inserted into one loading hole 131, thereby feeding the workpiece 5 into the loading hole 131, and the second feeding shaft 291 passes through the lower inlet 109 and is inserted into another loading hole 131, thereby pushing the workpiece 5 in the loading hole 131 against the quenching and straightening assembly 3.

[0074] Specifically, the number of loading holes 131 on the rotary disk 13 is N (N≥2, and N is an integer), and the central angle α between every two adjacent loading holes 131 is (360 / N)°. The ratchet rotation mechanism 4 drives the rotary disk 13 to rotate according to the central angle α.

[0075] In this embodiment, the heating element 12 is composed of heating rods, which are evenly laid around the circumference of the rotating disk 13, and adopt a resistance heating method to increase the heating speed and facilitate the control of the heating temperature. It can be understood that the heating element 12 is a heating tube, a heating plate, a heating net, etc., which can generate heat when powered.

[0076] It can be understood that the heating method of the rotating disk 13 by the heating element 12 includes but is not limited to electromagnetic heating, infrared heating, thermal zone heating, microwave heating and other heating methods; the heating element 12 is arranged inside the furnace body 10 to ensure sealing, and the heating element 12 is also provided with an insulating layer 11 and a ventilation component (not shown) and other equipment to ensure safety while ensuring the sealing effect. Preferably, the insulating layer 11 is made of quartz; the heating element 12 is mainly used to perform heat treatment on the workpieces 5 in the rotating disk 13 to ensure that the temperature difference between each workpiece 5 is no more than 3°C, thereby improving product quality and ensuring production efficiency.

[0077] The present invention utilizes the first feeding shaft 181 to push the workpiece 5 into the loading hole 131 on the turntable 13, and the heating element 12 heats the turntable 13 as a whole, thereby ensuring the uniformity and stability of heating. The ratchet rotation mechanism 4 is used to control the rotation of the turntable 13, so that one workpiece 5 is loaded in one loading hole 131, thereby preventing stacking from affecting the processing effect and improving the uniformity of heating. The second feeding shaft 191 is then used to push the heated workpiece 5 out of the heating furnace 1, thereby completing the heat treatment process of the workpiece 5.

[0078] In order to ensure the continuity of loading and unloading of the workpiece 5, it is particularly important to control the rotation of the turntable 13. Since it takes time to load or unload the workpiece 5 into or out of the turntable 13, the turntable 13 needs to be stationary for a period of time after each rotation. The ratchet rotation mechanism 4 is suitable for the single unidirectional rotation required by the present invention.

[0079] See also Fig.12 , Fig.15 , Fig.16 , Fig.18 The ratchet rotating mechanism 4 includes a main shaft 40 and a ratchet mechanism assembly 42 mounted on the main shaft 40. The main shaft 40 is rotatably arranged on the furnace body 10. The two ends of the main shaft 40 extend to the opposite sides of the furnace body 10 respectively. The turntable 13 is fixed relative to the main shaft 40. When in use, the ratchet mechanism assembly 42 is used to drive the main shaft 40 to rotate, and then drive the turntable 13 to make unidirectional intermittent rotation. Preferably, the main shaft 40 and the turntable 13 are coaxially arranged. In order to ensure the stability of heating of the furnace body 10, a temperature insulation cooling device should be provided between the main shaft 40 and the furnace body 10 to prevent high temperature overflow, ensure production safety, and improve the heat treatment effect.

[0080] Furthermore, an outer cooling fixed sleeve 41 is cooperatively connected between the main shaft 40 and the furnace body 10, a cooling cavity 411 is provided in the wall of the outer cooling fixed sleeve 41, cooling deep holes 412 are drilled in the axial direction on both side end surfaces of the main shaft 40, and an inner cooling fixed sleeve 410 is fixedly connected to the end of the main shaft 40, and the inner cooling fixed sleeve 410 is facing the cooling deep hole 412 and is threadedly connected to the main shaft 40. When in use, cooling water is respectively introduced into the cooling cavity 411 and the cooling deep hole 412 to cool the main shaft 40, prevent high temperature from affecting the working stability of the main shaft 40, and reduce the influence of heat conduction on other components, thereby improving the safety of use and service life.

[0081] Specifically, the outer cooling fixed sleeve 41 is detachably connected to the furnace body 10 by fasteners such as bolts or screws, and a bearing is provided on the inner wall of the outer cooling fixed sleeve 41, and the main shaft 40 is rotatably arranged in the outer cooling fixed sleeve 41 by using the bearing. The outer cooling fixed sleeve 41 is connected with a first water inlet head 413 and a first water outlet head 414, and the first water inlet head 413 and the first water outlet head 414 are respectively connected to the cooling cavity 411, thereby realizing the cold circulation of the cooling cavity 411. The inner cooling fixed sleeve 410 is rotatably provided with a second water inlet head 415 and a second water outlet head 416, and the second water inlet head 415 and the second water outlet head 416 are respectively connected to the cooling deep hole 412, thereby realizing the cold circulation of the cooling deep hole 412.

[0082] In this embodiment, a lower bracket 14 is fixedly connected to the side of the furnace body, and the lower bracket 14 is clamped and connected to the second water inlet head 415 and the second water outlet head 416 by fasteners such as bolts or screws. When the main shaft 40 rotates, the internal cooling fixed sleeve 410 rotates accordingly, and the second water inlet head 415 and the second water outlet head 416 arranged in the internal cooling fixed sleeve 410 remain stationary under the action of the bearing, thereby ensuring stability during use.

[0083] It can be understood that the first water inlet head 413 and the first water outlet head 414 and the second water inlet head 415 and the second water outlet head 416 are all connected to external water pipes for introducing cooling water. The outer cooling fixed sleeve 41 and the inner cooling fixed sleeve 410 are both provided with sealing components, such as O-rings, packings, etc., to ensure sealing and improve cooling effect. The sealing components do not affect the rotation of the outer cooling fixed sleeve 41 and the inner cooling fixed sleeve 410 while ensuring the sealing effect, thereby improving the stability of use.

[0084] In order to enable the main shaft 40 to drive the turntable 13 to rotate intermittently in one direction, it is necessary to set connecting components such as a sleeve and a connecting sleeve at the end of the main shaft 40 to install the ratchet mechanism assembly 42 to the end of the main shaft 40 and drive the main shaft 40 to rotate intermittently in one direction.

[0085] See also Fig. 9 , Fig.13 , Fig.15 , Fig.16 , Fig.17 The end fixing sleeve of the main shaft 40 near the feeding assembly 2 is provided with a connecting sleeve 401, and one end surface of the connecting sleeve 401 is detachably fixedly connected with a driven sleeve 402 by bolts. The driven sleeve 402 is sleeved outside the inner cooling fixing sleeve 410 and does not contact the outer wall of the inner cooling fixing sleeve 410 to reduce friction; at the same time, the ratchet mechanism assembly 42 is installed outside the driven sleeve 402. When in use, the ratchet mechanism assembly 42 is driven, and the connecting sleeve 401 and the driven sleeve 402 rotate accordingly, thereby driving the main shaft 40 to rotate.

[0086] Furthermore, the ratchet mechanism assembly 42 includes a ratchet 420 and a pawl 423, and the ratchet 420 is meshed with the pawl 423. It can be understood that the ratchet 420 and the pawl 423 constitute a common unidirectional intermittent motion mechanism; the driven sleeve 402 is cooperatively connected with the driving wheel 43 and the active sleeve 403, and the ratchet 420 is threadedly connected to the active sleeve 403 as a whole by fasteners such as bolts (not shown in the figure) or screws, and the pawl 423 is installed on the driving wheel 43; the driving wheel 43 is rotatably connected to the driven sleeve 402 by a bearing, and the active sleeve 403 and the driven sleeve 402 are key-connected.

[0087] During use, when the pawl 423 rotates clockwise, the driving wheel 43 rotates clockwise accordingly, the pawl 423 abuts against the ratchet 420 and drives the ratchet 420 to rotate unidirectionally, and at the same time the ratchet 420 drives the active sleeve 403 to rotate synchronously, and the driven sleeve 402, the connecting sleeve 401, and the main shaft 40 also rotate synchronously; when the pawl 423 rotates counterclockwise, the driving wheel 43 rotates counterclockwise accordingly, and the pawl 423 cannot drive the ratchet 420 to rotate according to the characteristics of the ratchet mechanism, thereby causing the active sleeve 403, the main shaft 40 and other components connected to it on the ratchet 420 to stop rotating, thereby realizing the unidirectional intermittent motion of the main shaft 40.

[0088] Preferably, the active sleeve 403 , the driven sleeve 402 and the connecting sleeve 401 are all coaxially arranged with the main shaft 40 .

[0089] In order to control the ratchet mechanism assembly 42 , accurately control the rotation angle of the main shaft 40 , and ensure the accuracy of loading and unloading, a driving device needs to be installed on the ratchet mechanism assembly 42 .

[0090] See also Fig. 9 , Fig.10 , Fig.15 , Fig.16 , Fig.17 The first suspension bracket 481 and the second suspension bracket 491 are fixedly connected to the side of the furnace body 10 facing the feeding assembly 2. The lower plane of the first suspension bracket 481 is rotatably connected to the first pressing cylinder 48, and the lower plane of the second suspension bracket 491 is rotatably connected to the first locking cylinder 49.

[0091] Furthermore, the telescopic end of the first pressing cylinder 48 is rotatably connected to the pressing arm 47, and the pressing arm 47 is fixedly connected to the driving wheel 43. When in use, the first pressing cylinder 48 is started, and the telescopic end of the first pressing cylinder 48 moves up and down, thereby driving the pressing arm 47 to swing around the axis of the main shaft 40, and the driving wheel 43 rotates synchronously with the pressing arm 47.

[0092] Furthermore, the pawl 423 is rotatably connected to the lower pressure arm 47, and a compression spring 471 is provided between the top of the pawl 423 and the lower pressure arm 47; when in use, the bottom of the pawl 423 is engaged with the ratchet 420, and when the compression spring 471 tightens the top of the pawl 423, the bottom of the pawl 423 will always fit the ratchet 420, thereby ensuring the stability of the operation of the ratchet 420 and the pawl 423.

[0093] The present invention utilizes a compression spring 471 to keep the pawl 423 engaged with the ratchet 420 at all times. When the telescopic end of the first downward-pressing oil cylinder 48 presses the downward-pressing arm 47 downward, the pawl 423 follows the movement, thereby pushing the ratchet 420 to rotate. When the telescopic end of the first downward-pressing oil cylinder 48 pulls the downward-pressing arm 47 upward, the pawl 423 moves in accordance with the outer contour of the ratchet 420 and resets, completing a unidirectional movement.

[0094] Specifically, the ratchet 420 is coaxially arranged with the active sleeve 403, and the ratchet 420 rotates synchronously with the main shaft 40. When in use, each time the first downward pressure cylinder 48 is pressed down, the pawl 423 is pressed down once, and the main shaft 40 rotates unidirectionally, thereby driving the turntable 13 to rotate once. When in use, it is only necessary to adjust the length of the telescopic end of the first downward pressure cylinder 48 to control the angle at which the pawl 423 presses down the ratchet 420, thereby realizing the control of the rotation angle of the turntable 13.

[0095] In order to ensure the rotation stability of the ratchet mechanism assembly 42 and prevent it from rotating or loosening, the ratchet mechanism assembly 42 should be provided with a safety lock device.

[0096] Furthermore, a limit gear 421 is formed in the circumferential direction of the active sleeve 403 , and the telescopic end of the first locking cylinder 49 is rotatably connected to a locking chuck 46 , which is engaged and connected between the teeth of the limit gear 421 .

[0097] Specifically, the furnace body 10 is also fixedly connected to the side facing the feeding assembly 2 with an upper bracket 15, and the upper bracket 15 is fixedly connected to the support shaft 45, and the locking clamp 46 is rotatably connected to the end of the support shaft 45, so that the locking clamp 46 can rotate around the axis of the support shaft 45. When in use, when the telescopic end of the first locking oil cylinder 49 moves downward, the locking clamp 46 rotates around the axis of the support shaft 45, and then disengages from the limit gear 421, and when the telescopic end of the first locking oil cylinder 49 moves upward, the end of the locking clamp 46 is clamped and connected between the teeth of the limit gear 421, thereby locking the limit gear 421 and the active sleeve 403, and completing self-locking.

[0098] It is understandable that since it takes time to load the workpiece 5 into the rotary disk 13, it needs to be stationary for a period of time after each rotation to ensure the stability of the installation of the workpiece 5. The ratchet mechanism assembly 42 is suitable for the single unidirectional rotation required by the present invention. During the stationary process, in order to ensure that the main shaft does not rotate, the locking chuck 46 is used to be inserted between the teeth of the limit gear 421 to directly cut off the power transmission, thereby improving the safety performance of the present invention.

[0099] In another embodiment, a dividing plate (not shown) is further provided on the active sleeve 403 to mark the rotation angle or number of rotations of the ratchet mechanism assembly 42, thereby facilitating measurement by production personnel and improving practicality.

[0100] In other embodiments, the ratchet rotation mechanism 4 is replaced by a synchronous motor, and the output shaft of the synchronous motor is connected to the turntable 13 through a gearbox. The synchronous motor is used to drive the turntable 13 to rotate, and the rotation angle of the turntable 13 is precisely controlled to prevent rotation or loosening, thereby realizing unidirectional intermittent rotation of the turntable 13.

[0101] The specific operation method of the heating furnace 1 and the ratchet rotation mechanism 4 is as follows: step 1: start the heating element 12 to heat the turntable 13 in the heating furnace 1, and use the first feeding compression cylinder 28 to push the workpiece 5 from the upper entrance 108 into the loading hole 131 on the turntable 13 to complete the feeding.

[0102] Step 2: Start the first locking cylinder 49 to lift the locking chuck 46 and disengage from the limit gear 421, start the first pressing cylinder 48, so that the pressing arm 47 drives the pawl 423 to rotate, and then drives the ratchet 420 and the main shaft 40 to rotate, and the main shaft 40 drives the turntable 13 to rotate synchronously, completing the initial rotation of the turntable 13.

[0103] Step three: reset the first locking cylinder 49, so that the locking clamp 46 falls and is engaged between the teeth of the limit gear 421 to complete the limit; reset the first pressing cylinder 48, and the pressing arm 47 is quickly reset under the action of the driving wheel 43, and at the same time drives the pawl 423 to reset. There is no direct driving relationship between the main shaft 40 and other components and the driving wheel 43, and thus they cannot be reset, thereby completing the unidirectional single rotation of the turntable 13.

[0104] Step 4: Use the first feeding compression cylinder 28 to push another workpiece 5 from the upper entrance 108 into the loading hole 131 on the turntable 13 to complete the secondary feeding; at the same time, use the second feeding compression cylinder 29 to extend from the lower entrance 109 to push the workpiece 5 that has completed the heat treatment and is located in the loading hole 131 out from the lower entrance 109 on the other side of the heating furnace 1 to complete the heat treatment processing of one workpiece 5.

[0105] The heating furnace 1 performs heat treatment on the workpiece 5, and utilizes the separately arranged loading holes 131 to separate the workpieces 5 from each other, thereby reducing problems such as overlapping and close contact, and improving product quality and production efficiency. At the same time, the heating furnace 1 has good sealing and heating effects, effectively realizes uniform heating, and ensures that the temperature difference between each workpiece 5 is no more than 3°C, further improving product quality; the ratchet rotation mechanism 4 realizes precise control of the rotation angle of the turntable 13, and adopts the ratchet mechanism assembly 42 to ensure that the turntable 13 realizes unidirectional intermittent rotation, so that the workpieces 5 can be loaded into the loading holes 131 in sequence, and at the same time ensures that the first feeding shaft 281 and the second feeding shaft 291 can be accurately inserted into the loading holes 131, thereby improving the stability of loading and unloading, and facilitating production use.

[0106] See also Fig.19 , Fig. 20 , Fig.21 , Fig. 22 The quenching and straightening assembly 3 includes a secondary shaft 30 and a plurality of straightening components 31 evenly arranged in a circumferential direction around the axis of the secondary shaft 30. The straightening component 31 faces the lower inlet 109 on the heating furnace 1. The second feeding shaft 291 extends from the lower inlet 109 and penetrates into the straightening component 31. When in use, the second feeding shaft 291 pushes the heat-treated workpiece 5 out of the lower inlet 109, and the workpiece 5 slides into the straightening component 31, and the straightening process of the workpiece 5 is completed using the straightening component 31.

[0107] A U-shaped bracket 34 is provided on the side of the heating furnace 1 away from the feeding assembly 2, the secondary shaft 30 is rotatably arranged in the U-shaped bracket 34 by means of a bearing, a transmission assembly 32 is provided on the secondary shaft 30 located inside the side wall of the U-shaped bracket 34, the transmission assembly 32 provides power for the straightening assembly 31 to straighten the workpiece 5, and a driving assembly 33 is provided on the secondary shaft 30 located outside the side wall of the U-shaped bracket 34, the driving assembly 33 drives the secondary shaft 30 to rotate and then drives all the straightening assemblies 31 to rotate synchronously; at the same time, the U-shaped bracket 34 is partially immersed in the quenching liquid, and the straightening assembly 31 near the bottom of the U-shaped bracket 34 is completely immersed in the quenching liquid, and the quenching liquid includes but is not limited to oil; when in use, the workpiece 5 that has just undergone heat treatment is clamped by the straightening assembly 31, the secondary shaft 30 is rotated, and the straightening assembly 31 rotates around the axis of the secondary shaft 30, and then the workpiece 5 is immersed in the quenching liquid to complete the quenching process of the workpiece 5.

[0108] See also Fig.23 , Fig.24 , Fig.26, two mounting turntables 35 are connected to the position of the secondary shaft 30 near the inner side wall of the U-shaped bracket 34, and the mounting turntable 35 is coaxially arranged with the secondary shaft 30; there is a gap between the mounting turntable 35 and the inner side wall of the U-shaped bracket 34, and the transmission assembly 32 is located in the gap and mounted on the side of the mounting turntable 35, and the straightening assembly 31 is mounted between the two mounting turntables 35. When in use, the secondary shaft 30 is rotated, and the mounting turntable 35 and the transmission assembly 32 rotate accordingly, and at the same time, multiple straightening assemblies 31 are driven to rotate synchronously.

[0109] For further information, see Fig.19 , Fig.26 , Fig. 27 , Fig.28 The straightening assembly 31 includes a left rotating shaft 311, a right rotating shaft 312 and a clamping frame 314. The left rotating shaft 311 and the right rotating shaft 312 are arranged at an interval, and the workpiece 5 is placed between the left rotating shaft 311 and the right rotating shaft 312; one side of the clamping frame 314 is evenly provided with a plurality of profiling rods 313 above the left rotating shaft 311 and the right rotating shaft 312, and the profiling rods 313 abut against the outer surface of the workpiece 5 and press the workpiece 5.

[0110] Specifically, the profiling rod 313 passes through the clamping frame 314 and is detachably connected to the clamping frame 314. A profiling wheel 315 is provided at the end of the profiling rod 313, and the profiling wheel 315 abuts the outer surface of the workpiece 5 to achieve point contact clamping of the workpiece 5, thereby ensuring the uniformity and stability of the clamping; at the same time, a convex ring 310 is provided on the outer surface of the left rotating shaft 311 and the right rotating shaft 312, so that the contact between the left rotating shaft 311 and the right rotating shaft 312 and the workpiece 5 is also point contact. By adjusting the distance of the point contact, the straightening accuracy can be more accurately controlled. At the same time, for a workpiece 5 with multiple diameters, the contact point can be effectively guaranteed, and the clamping and straightening of each diameter segment of the entire workpiece 5 can be achieved, thereby improving the practicality of the present invention.

[0111] In this embodiment, the profiling rod 313 is slidably arranged in the pressing frame 314 by means of a flat key, an adjusting spring 318 is telescopically arranged between the profiling rod 313 and the pressing frame 314, one end of the profiling rod 313 away from the profiling wheel 315 is threadedly connected to the limiting member 317, one end of the adjusting spring 318 abuts against the shoulder of the profiling rod 313, and the other end of the adjusting spring 318 abuts against the bottom surface of the limiting member 317;

[0112] Furthermore, the limit member 317 is composed of a gasket and a nut. The bottom surface of the limit member 317 abuts against the clamping frame 314 and the gasket is threadedly fixedly connected to the clamping frame 314. When in use, the nut in the limit member 317 is rotated to adjust the height of the contour rod 313, so that it is suitable for clamping workpieces 5 of different diameters, with convenient adjustment and accurate positioning.

[0113] In another embodiment, the limit member 317 is composed of a gasket and a sleeve. The limit member 317 is sleeved on the end of the profiling rod 313 and is threadedly fixedly connected to the clamping frame 314. The adjusting spring 318 is sleeved on the profiling rod 313. One end of the adjusting spring 318 abuts against the shoulder of the profiling rod 313, and the other end of the adjusting spring 318 abuts against the bottom surface of the limit member 317. When in use, the height of the profiling rod 313 is automatically adjusted by using the adjusting spring 318, so that it is suitable for clamping workpieces 5 of different diameters without manual adjustment.

[0114] The present invention inserts the profiling rod 313 with the flat key into the clamping frame 314, and the flat key is used to prevent the profiling rod 313 from rotating axially, and the profiling wheels 315 at the ends of the multiple profiling rods 313 are abutted against the outer surface of the workpiece 5, and an adjusting spring 318 is sleeved on the profiling rod 313, and then a limiting member 317 is sleeved on the profiling rod 313 and the limiting member 317 is threadedly fixed on the clamping frame 314, and the adjusting spring 318 is compressed in the clamping frame 314, so that the profiling rod 313 moves up and down in the clamping frame 314 under the action of the adjusting spring 318. When the profiling wheel 315 abuts against the workpiece 5, the profiling rod 313 will automatically adjust its height according to the outer contour of the workpiece 5, thereby making the clamping more stable and ensuring the straightening effect. At the same time, during the straightening process, the profiling rod 313 will be dynamically adjusted according to the diameter of the workpiece 5, further improving the straightening effect.

[0115] In other embodiments, the contact between the left rotating shaft 311, the right rotating shaft 312 and the workpiece 5 is line contact. For workpieces 5 with the same diameter, the use of line contact can effectively ensure the processing area and improve the straightening efficiency and straightening quality.

[0116] It can be understood that a limiting device is provided on the surface of the clamping frame 314 facing the first fixed seat 351, and the limiting device abuts the first fixed seat 351. The limiting device includes but is not limited to bolts. The limiting device is used to further limit the height of the contour wheel 315 to prevent the adjustment spring 318 from damaging the workpiece 5 due to excessive elastic force, thereby ensuring stability in use.

[0117] For further information, see Fig.23 , Fig.26 , Fig.28The mounting turntable 35 is provided with a first fixing seat 351, a second fixing seat 352 and a spring bracket 353 in the circumferential direction. The left rotating shaft 311 and the right rotating shaft 312 are rotatably connected to the first fixing seat 351. Preferably, the axes of the left rotating shaft 311 and the right rotating shaft 312 are located on the same horizontal plane. The pressing frame 314 is rotatably connected to the second fixing seat 352. The spring bracket 353 is fixedly connected to the mounting turntable 35. A locking spring 319 is provided on the spring bracket 353. The locking spring 319 abuts against the side of the pressing frame 314 away from the profiling rod 313. When in use, the locking spring 319 is compressed between the pressing frame 314 and the spring bracket 353. The locking spring 319 is used to lift one side of the pressing frame 314, so that the profiling rod 313 located on the other side of the pressing frame 314 presses the workpiece 5, further improving the stability of the clamping.

[0118] Furthermore, second pressing cylinders 316 are symmetrically arranged on the side walls of the U-shaped bracket 34, one second pressing cylinder 316 corresponds to one pressing frame 314, and the telescopic end of the second pressing cylinder 316 is close to the locking spring 319 and abuts against the upper surface of the pressing frame 314. When in use, the second pressing cylinder 316 is started, and the telescopic end of the second pressing cylinder 316 abuts against the side of the pressing frame 314 and compresses the locking spring 319. When the workpiece 5 is placed between the left rotating shaft 311 and the right rotating shaft 312, the second pressing cylinder 316 is reset, the pressing frame 314 is reset, and the workpiece 5 is pressed under the action of the locking spring 319, thereby completing the clamping of the workpiece 5.

[0119] See also Fig.23 , Fig.24 , Fig.25 The transmission assembly 32 includes a synchronous sleeve 327 rotatably arranged on the secondary shaft 30 and a transmission motor 321 for driving the synchronous sleeve 327 to rotate. The synchronous sleeve 327 is located between the inner wall of the U-shaped bracket 34 and the outer wall of the mounting turntable 35. The synchronous sleeve 327 is detachably connected with a driving gear 323 and a synchronous gear 328. Preferably, the synchronous sleeve 327 is coaxially arranged with the secondary shaft 30.

[0120] Furthermore, the end of the left rotating shaft 311 passes through the first fixed seat 351 and is detachably connected to the left driving gear 325, the end of the right rotating shaft 312 passes through the first fixed seat 351 and is detachably connected to the right driving gear 326, and the driven gear 324 is detachably connected to the mounting turntable 35, a part of the driven gear 324 is respectively meshed with the left driving gear 325 and the right driving gear 326, and another part of the driven gear 324 is meshed with the synchronous gear 328; a pulley 322 is fixedly connected to the output shaft of the transmission motor 321, and the pulley 322 is synchronously connected to the driving gear 323 by a transmission belt.

[0121] When in use, the transmission motor 321 is started, the pulley 322 drives the driving gear 323 to rotate, the synchronous sleeve 327 and the synchronous gear 328 rotate around the axis of the secondary shaft 30, and the driven gear 324 rotates following the synchronous gear 328. The left driving gear 325 and the right driving gear 326 rotate synchronously in the same direction under the engagement of the driven gear 324, thereby driving the left rotating shaft 311 and the right rotating shaft 312 to rotate synchronously in the same direction, thereby realizing the rotation straightening of the workpiece 5.

[0122] In this embodiment, the direction of rotation of the transmission motor 321 is changed to quickly control the rotation direction of the left shaft 311 and the right shaft 312. When the left shaft 311 and the right shaft 312 rotate synchronously in the same direction, the workpiece 5 can rotate stably in a predetermined direction, and the clamping frame 314 is used to clamp the workpiece 5, which is convenient for straightening and improves the straightening accuracy and stability in use. At the same time, due to the need for quenching, most of the transmission component 32 needs to be immersed in the quenching liquid, and the transmission component 32 is subjected to anti-corrosion treatment, such as painting, and the characteristics of the gears such as low cost, easy replacement, and corrosion resistance are used to improve the service life and stability in use of the present invention.

[0123] In another embodiment, the left rotating shaft 311 and the right rotating shaft 312 are respectively connected to a servo feed motor, and the rotation direction and rotation speed of the left rotating shaft 311 and the right rotating shaft 312 are controlled by the servo feed motor to realize asynchronous and opposite rotation. When the left rotating shaft 311 and the right rotating shaft 312 rotate in opposite directions, downward pressure is generated on the workpiece 5, thereby improving the stability of clamping. However, the opposite rotation will cause the workpiece 5 to be unable to rotate on its own, affecting the straightening. The rotation speed between the left rotating shaft 311 and the right rotating shaft 312 is changed by the servo feed motor, thereby overcoming the problem of being unable to rotate on its own, effectively improving the scope of use, and ensuring the accuracy of the straightening.

[0124] See also Fig.14 , Fig.24 , Fig.26 The driving assembly 33 is fixedly connected to the end of the secondary shaft 30, and the driving assembly 33 is used to control the rotation of the secondary shaft 30. The rotation angle of the secondary shaft 30 is synchronized and consistent with the rotation angle of the main shaft 40.

[0125] In this embodiment, the structure of the driving assembly 33 is similar to that of the ratchet rotating mechanism 4. The driving assembly 33 uses a pawl to abut against the ratchet and drive the ratchet to rotate unidirectionally. At the same time, the ratchet drives the secondary shaft 30 to rotate synchronously, thereby realizing the control of the rotation of the secondary shaft 30. The driving assembly 33 uses a structure similar to that of the ratchet rotating mechanism 4 to ensure the synchronization of rotation. When the workpiece 5 is pushed out of the rotary disk 13 after heat treatment, the straightening assembly 31 quickly clamps the workpiece 5. The driving assembly 33 and the ratchet rotating mechanism 4 operate synchronously, thereby making the secondary shaft 30 and the main shaft 40 rotate at the same rotation angle at the same time, thereby facilitating another workpiece 5 to be accurately pushed into another straightening assembly 31, thereby ensuring the stability of the use of the present invention.

[0126] In another embodiment, the driving component 33 is a driving motor, and the output shaft of the driving motor is fixedly connected to the end of the secondary shaft 30. The driving motor is used to control the rotation of the secondary shaft 30 to realize the rotation between the straightening components 31. Since it takes a certain amount of time to install the workpiece 5 into the straightening component 31, the driving component 33 should be based on the angle between the two straightening components 31. After each rotation, it should be stationary for a period of time to ensure the stability of the installation of the workpiece 5.

[0127] The specific operation method of the quenching and straightening assembly 3 is as follows: step 1: start the transmission motor 321, the left rotating shaft 311 and the right rotating shaft 312 rotate synchronously in the same direction, start the second downward pressure cylinder 316, the telescopic end of the second downward pressure cylinder 316 abuts against the side of the clamping frame 314 and compresses the locking spring 319, so that the contour wheel 315 is lifted, and the second feeding shaft 291 is used to push the heat-treated workpiece 5 out from the lower entrance 109, and the workpiece 5 slides between the left rotating shaft 311 and the right rotating shaft 312 and rotates, completing the feeding of a workpiece 5.

[0128] Step 2: Reset the second pressing cylinder 316, the contour wheel 315 falls and presses the workpiece 5 under the action of the locking spring 319, completing the clamping of the workpiece 5 and achieving straightening.

[0129] Step three: Start the driving assembly 33, the pawl abuts against the ratchet and drives the ratchet to rotate unidirectionally, the ratchet drives the secondary shaft 30 to rotate synchronously, so that the mounting turntable 35 installed on the secondary shaft 30 rotates accordingly, the mounting turntable 35 drives the multiple straightening assemblies 31 to rotate synchronously, so that another straightening assembly 31 faces the lower inlet 109, and the replacement of the straightening assembly 31 is completed; at the same time, the straightening assembly 31 loaded with the workpiece 5 falls into the quenching liquid through rotation to complete the quenching.

[0130] The quenching and straightening assembly 3 uses the straightening component 31 to straighten the workpiece 5, and uses the contour wheel 315 to perform point contact clamping on the workpiece 5, so as to ensure the uniformity and stability of the clamping; at the same time, the outer surfaces of the left rotating shaft 311 and the right rotating shaft 312 are provided with a convex ring 310, so that the contact between the left rotating shaft 311 and the right rotating shaft 312 and the workpiece 5 is also point contact, and by adjusting the point contact distance, the straightening accuracy can be more accurately controlled. At the same time, for the workpiece 5 with multiple diameters, the contact point can be effectively guaranteed, so as to realize the clamping and straightening of each diameter segment of the entire workpiece 5, and provide a stable clamping force and accurate straightening degree.

[0131] See also Figure 1 , Fig.28 , Fig.30 The heating furnace 1 is provided with a loading pool 39 on the side thereof, the loading pool 39 is filled with the quenching liquid, the quenching and straightening assembly 3 is installed in the loading pool 39, and a discharge assembly 37 is provided in the loading pool 39 on the side of the quenching and straightening assembly 3. When in use, the discharge assembly 37 extracts the workpiece 5 after quenching, thereby completing the discharge process.

[0132] For further information, see Fig.19 , Fig. 22 , Fig.28 , Fig.32 The spring bracket 353 is detachably connected to a discharge tray 36, which is evenly arranged in the circumferential direction around the axis of the secondary shaft 30. The discharge tray 36 is a square plate structure, and openings 361 are evenly arranged on one side of the discharge tray 36. The openings 361 are connected between the convex rings 310 on the right rotating shaft 312. The openings 361 are located below the workpiece 5, and the discharge tray 36 is located above the discharge assembly 37.

[0133] Furthermore, the unloading assembly 37 is arranged at an angle in the loading pool 39, and the bottom surface of the unloading tray 36 close to the unloading device 37 is inclined toward the unloading device 37; when in use, the second downward pressure cylinder 316 is started, and the telescopic end of the second downward pressure cylinder 316 abuts against the side of the clamping frame 314 and compresses the locking spring 319, so that the contour wheel 315 is lifted, and the workpiece 5 slides from between the left rotating shaft 311 and the right rotating shaft 312 to the unloading tray 36, and then slides to the unloading device 37 to complete the unloading.

[0134] In this embodiment, the two second pressing cylinders 316 are arranged integrally, so that the second pressing cylinders 316 are started simultaneously, one second pressing cylinder 316 is used to load the workpiece 5 to be quenched, and the other second pressing cylinder 316 is used to unload the workpiece 5 that has been quenched, thereby ensuring continuity of use.

[0135] In another embodiment, two of the second downward pressure cylinders 316 are arranged separately, so that the second downward pressure cylinders 316 are started one after another, and the secondary shaft 30 is in a stationary state after rotating once, and there is enough time to complete the loading and unloading operations. At the same time, the two second downward pressure cylinders 316 arranged separately can reduce maintenance costs and increase service life.

[0136] See also Fig.31 , Fig.32 , Fig.33 The unloading assembly 37 includes symmetrically arranged unloading brackets 375, which are tilted against the inner wall of the loading pool 39. A plurality of unloading troughs 372 are movably arranged between the unloading brackets 375. The unloading troughs 372 receive the workpiece 5. The cross section of the unloading troughs 372 is V-shaped, and one unloading trough 372 faces the unloading tray 36. When in use, when the workpiece 5 slides down from the unloading tray 36, one unloading trough 372 is used to receive the workpiece 5. At the same time, the unloading bracket 375 will flip during the movement, and then discharge the workpiece 5, completing the unloading reception and transmission.

[0137] In this embodiment, both the discharge trough 372 and the discharge tray 36 are provided with oil leakage holes, and the quenching liquid on the workpiece 5 leaks into the loading pool 39 from the oil leakage holes, thereby reducing losses and improving the stability of use.

[0138] Furthermore, a rotating shaft 373 is rotatably connected between the two ends of the unloading bracket 375, and a second sprocket 378 is symmetrically provided on the rotating shaft 373. A second chain 379 is sleeved on the two second sprockets 378 on the same side. One side of the unloading chute 372 is detachably connected to the second chain 379, driving the rotating shaft 373 to rotate, thereby driving the unloading chute 372 to move along the second chain 379. During the movement, the unloading chute 372 will flip along the second chain 379, thereby realizing the transfer and transportation of the workpiece 5.

[0139] Furthermore, a discharge chute 374 is provided on the top surface of the loading pool 39. The discharge chute 374 is vertically mounted on the discharge bracket 375 and close to the rotating shaft 373. The bottom surface of the discharge chute 374 faces the bottom surface of the closest discharge chute 372. When in use, after the workpiece 5 in the discharge chute 372 passes through the rotating shaft 373, the discharge chute 372 flips over, and then the workpiece 5 in the discharge chute 372 slides into the discharge chute 374, completing the discharge process.

[0140] In this embodiment, the unloading bracket 375 is detachably connected to the second motor 371, and the output shaft of the second motor 371 is detachably connected to the first sprocket 376. The end of the rotating shaft 373 passes through the unloading bracket 375 and is detachably connected to the first sprocket 376. The first chain 377 is arranged between the two first sprockets 376. When in use, the second motor 371 is started, and the first sprocket 376 and the first chain 377 are used to drive the rotating shaft 373 to rotate.

[0141] In another embodiment, the rotating shaft 373 is fixedly connected to the output shaft of the second motor 371 , and the second motor 371 is used to directly drive the transmission shaft 373 to rotate.

[0142] Furthermore, a heating device 38 is provided on the inner wall of the loading pool 39, and the heating device 38 includes but is not limited to a heating rod. The heating device 38 is used to heat the quenching liquid in the loading pool 39 to ensure quenching stability and improve the product quality of the present invention.

[0143] The specific operation method of the unloading assembly 37 is as follows: step 1: start the second downward pressure cylinder 316, the telescopic end of the second downward pressure cylinder 316 abuts against the side of the clamping frame 314 and compresses the locking spring 319, so that the contour wheel 315 is lifted, and the workpiece 5 slides from between the left rotating shaft 311 and the right rotating shaft 312 to the unloading plate 36, and then slides to the unloading device 37 to complete the unloading.

[0144] Step 2: When the workpiece 5 slides down from the discharge tray 36, a discharge chute 372 is used to receive the workpiece 5 to complete the discharge reception and transmission; after the workpiece 5 in the discharge chute 372 passes through the rotating shaft 373, the discharge chute 372 is flipped, and then the workpiece 5 in the discharge chute 372 slides into the discharge chute 374 to complete the discharge process.

[0145] The unloading assembly 37 is used to unload the workpiece 5, can continuously receive the workpiece 5 that has completed quenching, and filter out the quenching liquid on the workpiece 5 to reduce loss. At the same time, the quenching liquid is heated and a constant temperature quenching liquid is used to ensure quenching stability and improve the product quality of the present invention.

[0146] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A heating furnace for heat treating a workpiece (5), characterized in that: The heating furnace (1) comprises a furnace body (10) and a rotating disk (13) rotatably arranged in the furnace body (10); a heating element (12) is arranged on the side of the rotating disk (13) in the heating furnace (10); The rotary disk (13) is provided with a plurality of loading holes (131), the plurality of loading holes (131) are evenly arranged along the circumference of the rotary disk (13), the two ends of the loading holes (131) respectively penetrate through two opposite end surfaces of the rotary disk (13), and one workpiece (5) is located in one loading hole (131); An upper entrance (108) and a lower entrance (109) are provided on the side of the furnace body (10); the lower entrance (109) passes through two opposite side walls of the furnace body (10) along the direction in which the workpiece (5) is pushed into the heating furnace (1); the upper entrance (108) faces one loading hole (131), and the lower entrance (109) faces another loading hole (131).

2. The heating furnace according to claim 1, characterized in that: The number of the loading holes (131) on the rotating disk (13) is N, N≥2, and N is an integer, and the central angle α between two adjacent loading holes (131) is (360 / N)°.

3. The heating furnace according to claim 1, characterized in that: The furnace body (10) is provided with a first feeding compression cylinder (28) and a second feeding compression cylinder (29) outside the furnace body; the output end of the first feeding compression cylinder (28) is formed with a first feeding shaft (281) in the shape of a slender rod; the output end of the second feeding compression cylinder (29) is formed with a second feeding shaft (291) in the shape of a slender rod; the second feeding shaft (291) is located below the first feeding shaft (281); the first feeding shaft (281) is opposite to the upper inlet (108), and the second feeding shaft (291) is opposite to the lower inlet (109).

4. The heating furnace according to claim 1, characterized in that: The heating element (12) is composed of a combination of heating rods, and the heating power of the heating element (12) is 5-10 kw / h.

5. The heating furnace according to claim 1, characterized in that: The heating furnace (1) also includes a ratchet rotating mechanism (4), which is mounted on a turntable (13). The ratchet rotating mechanism (4) includes a main shaft (40) and a ratchet mechanism assembly (42) mounted on the main shaft (40). The main shaft (40) is rotatably arranged in the furnace body (10), and the turntable (13) is fixed relative to the main shaft (40).

6. The heating furnace according to claim 5, characterized in that: The two ends of the main shaft (40) extend to opposite sides of the furnace body (10), an external cooling fixed sleeve (41) is cooperatively connected between the main shaft (40) and the furnace body (10), and an internal cooling fixed sleeve (410) is fixedly connected to the end of the main shaft (40), and cooling water is passed through both the external cooling fixed sleeve (41) and the internal cooling fixed sleeve (410).

7. The heating furnace according to claim 6, characterized in that: A connecting sleeve (401) is fixedly mounted on the end of the main shaft (40), and a driven sleeve (402) is detachably connected to one end surface of the connecting sleeve (401), and a driving wheel (43) and an active sleeve (403) are connected to the driven sleeve (402); the ratchet mechanism assembly (42) comprises a ratchet (420) and a pawl (423), the ratchet (420) is cooperatively connected to the active sleeve (403), the pawl (423) is mounted on the driving wheel (43), and the pawl (423) abuts against the ratchet (420) and drives the ratchet (420) to rotate in one direction.

8. The heating furnace according to claim 7, characterized in that: A first pressing cylinder (48) and a first locking cylinder (49) are rotatably provided on the side of the furnace body (10); the telescopic end of the first pressing cylinder (48) is rotatably connected to a pressing arm (47), and the pressing arm (47) is fixedly connected to the driving wheel (43); the ratchet (423) is rotatably connected to the pressing arm (47), and a compression spring (471) is provided between the top of the ratchet (423) and the pressing arm (47).

9. The heating furnace according to claim 8, characterized in that: A limit gear (421) is formed on the circumferential direction of the active sleeve (403); the telescopic end of the first locking oil cylinder (49) is connected to a locking clamp (46); and the locking clamp (46) is engaged between the teeth of the limit gear (421).

10. A quenching and straightening machine, characterized in that: The quenching and straightening machine comprises the heating furnace (1) as described in any one of claims 1 to 9, and the quenching and straightening machine also comprises a feeding assembly (2) and a quenching and straightening assembly (3), wherein the feeding assembly (2) and the quenching and straightening assembly (3) are respectively located on opposite sides of the heating furnace (1), and the feeding assembly (2) feeds the workpiece (5) into the heating furnace (1) from the upper entrance (108), and pushes the workpiece (5) from the heating furnace (1) into the quenching and straightening assembly (3) through the lower entrance (109).

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