CN220837300U - Online heat treatment straightener of square rectangular pipe - Google Patents
Online heat treatment straightener of square rectangular pipe Download PDFInfo
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- CN220837300U CN220837300U CN202322679658.7U CN202322679658U CN220837300U CN 220837300 U CN220837300 U CN 220837300U CN 202322679658 U CN202322679658 U CN 202322679658U CN 220837300 U CN220837300 U CN 220837300U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 35
- 230000006698 induction Effects 0.000 claims abstract description 45
- 238000005496 tempering Methods 0.000 claims abstract description 19
- 238000007599 discharging Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 238000010791 quenching Methods 0.000 claims abstract description 13
- 230000000171 quenching effect Effects 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000007921 spray Substances 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 7
- 238000009826 distribution Methods 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 description 10
- 238000005507 spraying Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010622 cold drawing Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The utility model relates to an online heat treatment straightening device for square and rectangular pipes, which consists of an induction quenching device, an automatic tempering device and an online temperature straightening device; the self-tempering device comprises a temperature measuring instrument, a roller speed adjusting device and a conveying frame, and the material transferring mechanism is arranged between the heat induction furnace discharging frame and the conveying frame; the online temperature straightening device is arranged at the rear end of the self-tempering device and comprises an advancing auxiliary wheel, an upper pressure straightening roller, a side pressure straightening roller, a supporting roller and a blanking frame of the straightener. The online heat treatment straightening device for the square rectangular pipe solves the problems of poor heat treatment effect, low straightening efficiency, poor straightness of the pipe and uneven residual stress distribution in the prior art of the thin-wall Gao Jiangfang rectangular pipe.
Description
Technical Field
The utility model provides an online heat treatment straightening device for square and rectangular pipes.
Background
The rectangular tube with the thin wall (the thickness is less than or equal to 10 mm) Gao Jiangfang is a key raw material in the fields of equipment manufacturing, engineering machinery, marine ships, military industry and the like. The square rectangular pipe is subjected to heat treatment after extrusion molding or cold drawing molding, and the microstructure of the square rectangular pipe is regulated and controlled by utilizing different heating temperatures and cooling modes, so that more excellent performance is obtained, and the stability and durability of the pipe are ensured. Because uneven stress is generated in the forming and heat treatment processes, the deformation of the pipe is uneven, and the straightness is easy to change, the straightening is carried out after the heat treatment. For the rectangular tube with the thin wall Gao Jiangfang, the thickness is small and the strength is high, so that the deformation degree is more prominent and the straightening is difficult.
Currently, continuous heat treatment furnaces are the primary heat treatment equipment for thin-walled Gao Jiangfang rectangular pipes. However, the following problems are likely to occur after the continuous furnace heat treatment:
1. The length of the thin-wall square rectangular pipe is generally 6-14 meters, and in the quenching process, the pipe is easy to cause uneven cold and heat due to longer length, so that the phenomenon of large bending occurs;
2. The square rectangular pipe has lower service performance, the cooling effect after heat treatment affects the comprehensive performance of the square rectangular pipe, and the bottom surface of the pipe is tightly attached to the furnace roller, so that the heat exchange with water is impossible, and therefore, the uniformity of the pipe structure and the uniformity of the performance are poor.
In addition, the thin-wall Gao Jiangfang rectangular pipe after heat treatment mainly adopts a hydraulic point straightening mode at room temperature, so that the problems of difficult control of the rolling reduction and the pressure exist, and the straightening difficulty is high. If the rolling reduction is smaller, the square and rectangular tube has higher strength and uneven residual stress distribution during straightening, so that the elastoplastic deformation is difficult, the deformation rebound easily occurs after the straightening, and the straightening effect is not obvious; if the rolling reduction is large, the square rectangular pipe is small in thickness, the phenomena of dent, S-bend and the like are easy to occur, and the square rectangular pipe can be barely used after correction, straightening and grinding, so that the manufacturing cost is increased, and the straightening efficiency is reduced.
The heat treatment and straightening devices of the thin-wall Gao Jiangfang rectangular pipe affect the production efficiency of the pipe and manufacture of finished products, so that the conventional heat treatment and straightening devices cannot meet the requirements of the Gao Jiangfang rectangular pipe on quality and safety.
Disclosure of Invention
The online heat treatment straightening device for the square and rectangular pipe provided by the utility model has the advantages of good heat treatment effect, high straightening efficiency and high pipe product quality.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
An online heat treatment straightening device for square and rectangular pipes comprises an induction quenching device, an automatic tempering device and an online temperature straightening device;
The heat treatment device comprises a heat induction furnace feeding frame and a heat induction furnace discharging frame, an induction coil is arranged between the heat induction furnace feeding frame and the heat induction furnace discharging frame, an outer shower ring is arranged at the rear side of the induction coil, densely distributed water outlets are formed in the inner wall of the outer shower ring, an inner spray head is arranged on the heat induction furnace discharging frame and connected with a water inlet pipe, and the water inlet pipe is a hard plastic pipe;
The automatic tempering device is arranged beside a blanking frame of the heat induction furnace, the thin-wall square rectangular pipe is conveyed to the automatic tempering device through a material transferring mechanism after quenching is completed, the material transferring mechanism comprises a frame base, a fixed gear is arranged at the top of the frame base and meshed with a rotary gear, a rotating shaft of the fixed gear is connected with a rotating shaft of the rotary gear through a transmission rod, the rotating shaft of the rotary gear is arranged in a rotating track, the rotary gear is arranged on a telescopic rod, and an electromagnetic chuck is fixed at the other end of the telescopic rod;
The automatic tempering device comprises a thermometer, a roller speed adjusting device and a conveying frame, wherein the material transferring mechanism is arranged between the blanking frame and the conveying frame of the heat induction furnace, the conveying frame adjusts the rotating speed through the roller speed adjusting device, and the thermometer is arranged at the forefront end of the conveying frame;
The online temperature straightening device is arranged at the rear end of the self-tempering device, and comprises an advancing auxiliary wheel, an upper pressure straightening roller, a side pressure straightening roller, a supporting roller and a straightener blanking frame, wherein the straightener blanking frame is arranged at the rear of the conveying frame, a multi-section straightening device is arranged between the front end of the straightener blanking frame and the rear end of the conveying frame, and consists of an upper straightening device, a lower straightening device and a left straightening device, wherein the upper straightening device, the lower straightening device comprises an upper pressure straightening roller and a supporting roller, the supporting roller and the roller shafts of the upper pressure straightening roller are horizontally arranged, and the upper straightening device and the lower straightening device are arranged on supporting frames on the left side and the right side; the left-right straightening device comprises a lateral pressure straightening roller and a supporting roller, wherein the roller shafts of the supporting roller and the lateral pressure straightening roller are vertically arranged and are arranged on an upper supporting frame and a lower supporting frame.
The upper straightening device, the lower straightening device and the left straightening device and right straightening device are arranged at intervals.
And the two sides of the tail end of the conveying frame and the two sides of the front end of the blanking frame of the straightener are provided with advancing auxiliary wheels.
The utility model has the beneficial effects that:
The online heat treatment straightening device for the square rectangular pipe solves the problems of poor heat treatment effect, low straightening efficiency, poor straightness of the pipe and uneven residual stress distribution in the prior art of a thin-wall Gao Jiangfang rectangular pipe:
1. The combination of an intermediate-frequency heat induction furnace and external spraying and internal spraying cooling is adopted, so that the equipment investment is economical and the operation cost is low. The cooling adopts a mode of 'spraying cooling inside and outside simultaneously', the heated pipe passes through an inner annular water spraying device and an outer annular water spraying device, cooling water with the pressure not less than 0.2MPa is sprayed inside and outside the steel pipe simultaneously, a steam water film is broken, and the cooling effect is full and good in uniformity. The square rectangular pipe advances on the roller way at a uniform speed, so that the uniformity of heating and cooling is ensured, and the heat-treated pipe is fine and uniform in structure, uniform in residual stress distribution and small in integral deformation.
2. The square rectangular tube adopts multi-roller straightening, and is provided with two pairs of roller sets respectively aiming at the upper surface, the lower surface, the left surface and the right surface of the square rectangular tube, and the straightening effect and the thickness range of the square rectangular tube are submitted. Each straightening roller is supported by a corresponding supporting roller, the height position of the straightening roller can be flexibly adjusted, and the straightening rollers and the supporting rollers are combined into roller gaps with different sizes, so that the straightening requirements of square and rectangular pipes with different sizes are met.
3. And the straightening method of straightening at the temperature is adopted, and the heat treatment of the intermediate frequency heat induction furnace and the temperature straightening of the multi-roller straightener are integrated, namely, the pipe is uniformly cooled to the room temperature after the heat treatment and is straightened. At the moment, the pipe in the slow cooling process has higher shaping, is improved by about 30 percent compared with normal temperature, is easy to relax after being subjected to pressure and is convenient to straighten, and meanwhile, the straightening deformation and metallographic structure change of the pipe synchronously occur, and fine crystal strengthening and deformation strengthening are generated, so that the strength and toughness of the square rectangular pipe are improved.
4. Aiming at the characteristics of sharp edges and inconvenient material transferring of the square rectangular tube, a special electromagnetic material transferring mechanism is adopted, the electromagnetic chuck has an automatic auxiliary positioning function, the square rectangular tube is sucked or released in 0.3 seconds, the material can be rotated 180 degrees at maximum, and the production efficiency can be greatly improved. The magnetic force of the sucker disappears to realize demagnetization, and the pipe is not affected.
Drawings
FIG. 1 is a schematic diagram of a straightening device for on-line heat treatment of square and rectangular pipes.
Fig. 2 is a schematic view of the transfer mechanism of fig. 1.
Wherein: the automatic feeding device comprises a hot induction furnace feeding frame 1, an induction coil 2, an outer shower ring 3, an inner spray head 4, a hot induction furnace discharging frame 5, a water inlet pipe 6, a thermometer 7, a roller speed adjusting device 8, a conveying frame 9, an advancing auxiliary wheel 10, an upper pressure straightening roller 11, a side pressure straightening roller 12, a supporting roller 13, a straightener discharging frame 14, a material rotating mechanism 15, an electromagnetic chuck 151, a rotating rail 152, a shrinking rod 153, a rotating gear 154, a fixed gear 155, a transmission rod 156 and a frame base 157.
Detailed Description
Referring to fig. 1 and 2, the utility model relates to an online heat treatment straightening device for square and rectangular pipes, which consists of an induction quenching device, an automatic tempering device and an online temperature straightening device.
The heat treatment device comprises a heat induction furnace feeding frame 1 and a heat induction furnace discharging frame 5, wherein the heat induction furnace feeding frame 1 and the heat induction furnace discharging frame 5 are positioned on the same straight line, the heat induction furnace feeding frame 1 and the heat induction furnace discharging frame 5 are used for conveying square rectangular pipes to be processed, an induction coil 2 is arranged between the heat induction furnace feeding frame 1 and the heat induction furnace discharging frame 5, an outer shower ring 3 is arranged on the rear side of the induction coil 2, densely distributed water outlets are formed in the inner wall of the outer shower ring 3, and when the square rectangular pipes rotationally move backwards, the outer walls of the square rectangular pipes can be sprayed outside in a full-coverage mode. An inner spray head 4 is arranged on the discharging frame 5 of the heat induction furnace, the inner spray head 4 is connected with a water inlet pipe 6, and the water inlet pipe 6 is a hard plastic pipe and can move back and forth. The square rectangular pipe can pass through the inner spray head 4 when moving backwards, and the water inlet pipe 6 is withdrawn backwards after the inner spray head 4 sprays water.
The thin-wall square rectangular pipe after extrusion or cold drawing molding enters a hot induction furnace feeding frame, the power of an induction coil and the running speed of a furnace roller of the hot induction furnace feeding frame are regulated by advancing a feeding roller way, the quenching temperature and the heat preservation time are regulated, the quenching temperature is controlled to 880-930 ℃, and the quenching heat preservation time is in direct proportion to the wall thickness of the steel pipe. After the induction coil heats the steel pipe to the quenching temperature, the steel pipe enters the outer shower ring under the conveying of the feeding roller way, and meanwhile, the inner shower nozzle stretches into the pipe. The water flow sprays outer water spray on the outer surface of the steel pipe through the outer water spray ring, the inner water spray is uniformly sprayed to the inner surface of the steel pipe through the spray head, the inner part and the outer part of the steel pipe are almost contacted with water at the same time, efficient and sufficient heat exchange is carried out, and the cooling efficiency is improved. The water spraying flow and the water spraying pressure are controlled by adjusting the water pressure of the water inlet pipe of the cooling device, so that the spraying pressure of the outer water spraying and the inner water spraying is not less than 0.2MPa.
The self-tempering device is arranged beside the blanking frame 5 of the heat induction furnace, and the thin-wall square rectangular pipe is conveyed to the self-tempering device through the material transferring mechanism 15 after quenching. Referring to fig. 2, the material transferring mechanism 15 includes a frame base 157, a fixed gear 155 is disposed on the top of the frame base 157, the fixed gear 155 is meshed with the rotary gear 154, and the number of teeth of the fixed gear 155 is half of the number of teeth of the rotary gear 154. The rotation shaft of the rotation gear 154 is disposed in the rotation rail 152 and can slide along the rotation rail 152, the rotation shaft of the fixed gear 155 is connected with the rotation shaft of the rotation gear 154 by a transmission rod 156, and the rotation gear 154 is driven to rotate relative to the fixed gear 155 by the transmission rod 156. The rotating gear 154 is disposed on the telescopic rod 153, and an electromagnetic chuck 151 is fixed to the other end of the telescopic rod 153. The drive link 156 and the telescopic link 153 are controlled to act by a control system.
After the pipe is quenched, the parameters of a working motor are preset in a control system of the material transferring mechanism 15, the rotary gear 154 is controlled to rotate to a proper position, the telescopic rod 153 is adjusted, and after the electromagnetic coil is electrified, the square rectangular pipe is fixed by the suction force generated by the electromagnetic chuck 151. The square rectangular tube is rotated onto the self-tempering device by the drive of the drive rod 156. In the whole process, the fixed gear 155 and the rotary gear 154 always keep the fit state, and the pipe can be rotated 180 degrees.
The automatic tempering device comprises a thermometer 7, a roller speed adjusting device 8 and a conveying frame 9, wherein a material transferring mechanism 15 is arranged between the discharging frame 5 of the heat induction furnace and the conveying frame 9, the conveying frame 9 adjusts the rotating speed through the roller speed adjusting device 8, and the thermometer 7 is arranged at the foremost end of the conveying frame 9. The pipe is slowly conveyed backwards on the conveying frame 9, waste heat is utilized to enter an autotempering process, a temperature measuring instrument 7 is adopted to monitor the temperature of the pipe in an air cooling process, monitoring information is fed back to a control system, the control system controls the roller speed of the conveying frame 9 through a roller speed adjusting device 8, and the temperature of the pipe when entering straightening is guaranteed after the autotempering is completed.
The online temperature straightening device is arranged at the rear end of the self-tempering device and comprises an advancing auxiliary wheel 10, an upper pressure straightening roller 11, a side pressure straightening roller 12, a supporting roller 13 and a straightener discharging frame 14. The straightening machine blanking frame 14 is arranged at the rear of the conveying frame 9, and a plurality of sections of straightening devices are arranged between the front end of the straightening machine blanking frame 14 and the rear end of the conveying frame 9, and are formed by arranging upper and lower straightening devices and left and right straightening devices at intervals. The upper and lower straightening device comprises an upper pressure straightening roller 11 and a supporting roller 13, a pipe passes through the supporting roller 13 and the upper pressure straightening roller 11, and the roller shafts of the supporting roller 13 and the upper pressure straightening roller 11 are horizontally arranged and arranged on supporting frames on the left side and the right side; the left-right straightening device comprises a lateral straightening roller 12 and a supporting roller 13, a pipe passes through the supporting roller 13 and the lateral straightening roller 12, and the roller shafts of the supporting roller 13 and the lateral straightening roller 12 are vertically arranged and arranged on an upper supporting frame and a lower supporting frame. The two sides of the tail end of the conveying frame 9 and the two sides of the front end of the blanking frame 14 of the straightener are provided with advancing auxiliary wheels 10 for clamping and conveying the pipe backwards.
Because the thin-wall square rectangular pipe can deform during quenching, the pipe starts to enter an online temperature straightening stage under the pushing of the advancing auxiliary roller. Under the simultaneous action of the straightening roller and the supporting roller, the thin-wall square rectangular pipe rapidly passes through the regulated roller gap and undergoes elastoplastic deformation, and the participation stress is relieved and eliminated until the straightness of the pipe is ensured.
Claims (3)
1. An online heat treatment straightener of square rectangular pipe, characterized by: the device consists of an induction quenching device, an automatic tempering device and an online temperature correcting device;
The heat treatment device comprises a heat induction furnace feeding frame and a heat induction furnace discharging frame, an induction coil is arranged between the heat induction furnace feeding frame and the heat induction furnace discharging frame, an outer shower ring is arranged at the rear side of the induction coil, densely distributed water outlets are formed in the inner wall of the outer shower ring, an inner spray head is arranged on the heat induction furnace discharging frame and connected with a water inlet pipe, and the water inlet pipe is a hard plastic pipe;
The automatic tempering device is arranged beside a blanking frame of the heat induction furnace, the thin-wall square rectangular pipe is conveyed to the automatic tempering device through a material transferring mechanism after quenching is completed, the material transferring mechanism comprises a frame base, a fixed gear is arranged at the top of the frame base and meshed with a rotary gear, a rotating shaft of the fixed gear is connected with a rotating shaft of the rotary gear through a transmission rod, the rotating shaft of the rotary gear is arranged in a rotating track, the rotary gear is arranged on a telescopic rod, and an electromagnetic chuck is fixed at the other end of the telescopic rod;
The automatic tempering device comprises a thermometer, a roller speed adjusting device and a conveying frame, wherein the material transferring mechanism is arranged between the blanking frame and the conveying frame of the heat induction furnace, the conveying frame adjusts the rotating speed through the roller speed adjusting device, and the thermometer is arranged at the forefront end of the conveying frame;
The online temperature straightening device is arranged at the rear end of the self-tempering device, and comprises an advancing auxiliary wheel, an upper pressure straightening roller, a side pressure straightening roller, a supporting roller and a straightener blanking frame, wherein the straightener blanking frame is arranged at the rear of the conveying frame, a multi-section straightening device is arranged between the front end of the straightener blanking frame and the rear end of the conveying frame, and consists of an upper straightening device, a lower straightening device and a left straightening device, wherein the upper straightening device, the lower straightening device comprises an upper pressure straightening roller and a supporting roller, the supporting roller and the roller shafts of the upper pressure straightening roller are horizontally arranged, and the upper straightening device and the lower straightening device are arranged on supporting frames on the left side and the right side; the left-right straightening device comprises a lateral pressure straightening roller and a supporting roller, wherein the roller shafts of the supporting roller and the lateral pressure straightening roller are vertically arranged and are arranged on an upper supporting frame and a lower supporting frame.
2. The online heat treatment straightening device for square and rectangular pipes according to claim 1, wherein the online heat treatment straightening device is characterized in that: the upper straightening device, the lower straightening device and the left straightening device and right straightening device are arranged at intervals.
3. The online heat treatment straightening device for square and rectangular pipes according to claim 1, wherein the online heat treatment straightening device is characterized in that: and the two sides of the tail end of the conveying frame and the two sides of the front end of the blanking frame of the straightener are provided with advancing auxiliary wheels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322679658.7U CN220837300U (en) | 2023-10-08 | 2023-10-08 | Online heat treatment straightener of square rectangular pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322679658.7U CN220837300U (en) | 2023-10-08 | 2023-10-08 | Online heat treatment straightener of square rectangular pipe |
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| Publication Number | Publication Date |
|---|---|
| CN220837300U true CN220837300U (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322679658.7U Active CN220837300U (en) | 2023-10-08 | 2023-10-08 | Online heat treatment straightener of square rectangular pipe |
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| Country | Link |
|---|---|
| CN (1) | CN220837300U (en) |
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2023
- 2023-10-08 CN CN202322679658.7U patent/CN220837300U/en active Active
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