CN112410529A - Integral heating deformation-preventing quenching device and process for small long shafts - Google Patents
Integral heating deformation-preventing quenching device and process for small long shafts Download PDFInfo
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- CN112410529A CN112410529A CN202011315284.5A CN202011315284A CN112410529A CN 112410529 A CN112410529 A CN 112410529A CN 202011315284 A CN202011315284 A CN 202011315284A CN 112410529 A CN112410529 A CN 112410529A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/28—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for plain shafts
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
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Abstract
An integral heating deformation-preventing quenching device and process for small long shafts, wherein the device comprises: the continuous heating furnace is used for continuously heating the slender shaft, a cantilever frame used for suspending the slender shaft is arranged above the continuous heating furnace, and the cantilever frame is provided with a plurality of lifting appliances used for suspending the slender shaft; the cantilever frame automatically conveys the slender shaft through a conveying device; the device is characterized by also comprising three side pressure shafts which are arranged in a regular triangle shape and used for pressing the slender shaft, wherein the surfaces of the three side pressure shafts are respectively in contact connection with three supporting rolls which are used for driving the side pressure shafts to rotate, the supporting rolls are arranged outside the side pressure shafts in a regular triangle shape, and the supporting rolls are concentrically arranged in a triangle shape with the side pressure shafts and have the same directions of three angles; nozzles are also arranged between every two side pressing shafts; one of the support shafts is used as a driving shaft and is connected with a rotating motor for providing rotating power; the side pressure shaft is connected with a hydraulic device for providing pressure for the side pressure shaft.
Description
Technical Field
The invention relates to the technical field of slender shafts, in particular to an integral heating deformation-preventing quenching device and process for small slender shafts.
Background
Quenching is a common heat treatment method for roller shaft products to achieve the surface hardness of workpieces, is widely applied to roller shafts with surface hardness requirements such as metallurgical rollers and waist-shaped rollers, can not avoid deformation of slender shafts 1:30 in China by adopting any quenching process, and has deformation deviation of four to five millimeters or even more than ten millimeters. If the pressure correction is carried out, the finish machining cannot ensure that the machine is not deformed in the use process, and the use precision of the machine is directly influenced. Even if someone is straightening, the difficulty of subsequent processing is increased, the overall production efficiency is reduced, and meanwhile, the service life of the product is greatly reduced because the internal stress existing inside cannot be changed.
Disclosure of Invention
The invention aims to solve the technical problems and provides a quenching device and a quenching process with good quenching effect and deformation prevention effect.
The utility model provides a quenching device that preapress for an unfavorable turn of events of bulk heating of tiny major axis class, includes: the method comprises the following steps: the continuous heating furnace is used for continuously heating the slender shaft, a cantilever frame used for suspending the slender shaft is arranged above the continuous heating furnace, and the cantilever frame is provided with a plurality of lifting appliances used for suspending the slender shaft;
the device is characterized by also comprising three side pressure shafts which are arranged in a regular triangle shape and used for pressing the slender shaft, wherein the surfaces of the three side pressure shafts are respectively in contact connection with three supporting rolls which are used for driving the side pressure shafts to rotate, the supporting rolls are arranged outside the side pressure shafts in a regular triangle shape, and the supporting rolls are concentrically arranged in a triangle shape with the side pressure shafts and have the same directions of three angles; nozzles are also arranged between every two side pressing shafts; one of the support shafts is used as a driving shaft and is connected with a rotating motor for providing rotating power; the side pressure shaft is connected with a hydraulic device for providing pressure for the side pressure shaft.
In the integral heating deformation-preventing quenching device for the small long shafts, the lifting appliance is a rotatable lifting appliance.
In the integral heating deformation-preventing quenching device for the small long shafts, the nozzle is used for spraying cooling medium to the long shafts, and the cooling medium can be liquid, mist or gas.
In the integral heating deformation-preventing quenching device for the small long shafts, the driving shaft is connected with a rotating motor through a transmission belt.
In the integral heating deformation-preventing quenching device for the small long shafts, the length of the side pressure shaft is greater than that of the long shaft.
The invention also provides an integral heating anti-deformation quenching process for the small long shafts, which comprises the following steps:
s1, firstly, the slender shaft is hung in a continuous heating furnace to be heated, and a workpiece is preheated, heated and preserved in the rotating process and then is discharged from the furnace;
s2, after discharging, the steel wire enters the central gaps of the three lateral pressure shafts in a centering manner, the steel wire quickly enters a quenching device, and under the state that a pressure measuring wheel is pressed, a rotating motor is started to drive the slender shaft to rotate for quenching and precooling;
s3, automatically adjusting the pressure of the side pressure shaft to about 30t through a hydraulic system after precooling, and spraying a cooling medium to rapidly cool the workpiece;
s4, taking out the workpiece and putting the workpiece into a low-temperature tempering furnace for tempering.
Has the advantages that: compared with the deformation deviation of several millimeters to tens of millimeters in the existing quenching processing technology, the technical scheme can control the deformation deviation to be more than ten wires. The processing precision of the slender shaft is greatly improved, the surface hardening strength of the product is high, the crystal structure is stable, and the service life of the product is prolonged.
Drawings
FIG. 1 is a schematic view of continuous heating of a thin long shaft.
Fig. 2 is a schematic structural view of an integral heating deformation-preventing quenching device for fine long shafts.
Fig. 3 is a schematic structural diagram of fig. 2 from another view angle.
In the figure: the continuous heating furnace comprises a continuous heating furnace 1, a hanger 2, a cantilever frame 3, a slender shaft 4, a side pressing shaft 5, a supporting roller 6, a support 7, a rotating motor 8, a nozzle 9 and a transmission belt 10.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The integral heating deformation-preventing quenching device and process for the fine long shafts of the embodiment of the invention are further described with reference to the accompanying drawings.
The utility model provides a quenching device that preapress for an unfavorable turn of events of bulk heating of tiny major axis class, includes: the continuous heating furnace is characterized by comprising a continuous heating furnace 1 for continuously heating a slender shaft 4, wherein a cantilever frame 3 for suspending the slender shaft 4 is arranged above the continuous heating furnace 1, and further, a plurality of lifting appliances 2 for suspending the slender shaft 4 are arranged on the cantilever frame 3; the cantilever frame 3 automatically conveys the slender shaft 4 through a conveying device;
further, the hanger 2 is a rotatable hanger 2, for example, the hanger 2 can drive the slender shaft 4 to rotate uniformly and stably by a rotating motor, under the above scheme, the slender shaft 4 is firstly hung in the continuous heating furnace 1 for heating, and the workpiece is preheated, heated, insulated and then discharged from the furnace during rotation. The process ensures the uniformity of heating, the vertical hanging can not deform due to self weight, and the uniformity of the growth of the austenite nuclei is facilitated;
the device is characterized by further comprising three side pressing shafts 5 which are arranged in a regular triangle shape and used for pressing the slender shaft 4 tightly, wherein the surfaces of the three side pressing shafts 5 are respectively in contact connection with three supporting rollers 6 which are used for driving the side pressing shafts 5 to rotate, the supporting rollers 6 are arranged outside the side pressing shafts 5 in a regular triangle shape, the supporting rollers are concentrically arranged in the triangle shape with the side pressing shafts 5, and the directions of the three angles are consistent; a nozzle 9 is arranged between every two side pressure shafts 5 and used for spraying cooling medium to the slender shaft 4, and the cooling medium can be liquid, mist or gas;
one of the support shafts is connected with a rotating motor 8 used for providing rotating power as a driving shaft; the side pressure shaft 5 is connected with a hydraulic device for providing pressure for the side pressure shaft; after the slender shaft 4 is discharged from the furnace, the center of three side pressing shafts 5 is centered, and the three side pressing shafts quickly enter a quenching device, and the time can be controlled according to the size of the shafts. The homogenized austenite is fixed in the period of time and does not grow any longer, thereby really achieving the pre-cooling effect and naturally reducing the possibility of deformation.
After precooling, the pressure of the side pressure shaft 5 is automatically adjusted to about 30t through a hydraulic system, and cooling media in different states are sprayed according to different materials. In this process: there is a certain pressure to induce an extreme uniformity in the rate of austenite formation to martensite. Giving the martensite formation a "route" under relative pressure, in a limited space, hindering the formation of inhomogeneous martensite. And spraying a cooling medium, such as water, to quickly cool the workpiece block to the temperature, taking out the workpiece and putting the workpiece into a low-temperature tempering furnace, so as to achieve the purposes of stabilizing the structure and eliminating stress and simultaneously reduce deformation.
Furthermore, the driving shaft is connected with a rotating motor 8 through a transmission belt 10.
Further, the length of the side pressure shaft 5 is larger than that of the slender shaft 4.
An integral heating deformation-preventing quenching process for fine long shafts comprises the following steps:
s1, the slender shaft 4 is hung in the continuous heating furnace 1 to be heated, and the workpiece is preheated, heated, kept warm and then discharged from the furnace during rotation.
In the process, the rotary heating ensures the heating uniformity, the vertical hanging cannot deform due to self weight, and the uniformity of the growth of the austenite nuclei is facilitated.
And S2, after discharging, centering the furnace, entering the central gaps of the three side pressure shafts 5, rapidly entering a quenching device, and starting the rotating motor 8 to drive the slender shaft 4 to rotate for quenching and precooling in the state that the pressure measuring wheel is pressed.
In the process, the precooling time can be controlled according to the size of the shaft, and the homogenized austenite is fixed and does not grow any longer just in the time, so that a precooling effect is really achieved, and the possibility of deformation is naturally reduced.
And S3, automatically adjusting the pressure of the side pressure shaft 5 to about 30t through a hydraulic system after precooling, and spraying a cooling medium to rapidly cool the workpiece.
In the process, a certain pressure leads the austenite to form extremely uniform martensite, so that the martensite is formed in a 'route' under the relative pressure, and the formation of uneven martensite is prevented in a limited space.
S4, taking out the workpiece and putting the workpiece into a low-temperature tempering furnace for tempering, so that the aims of stabilizing the structure and eliminating the stress are achieved, and the deformation is reduced.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a whole heating of tiny major axis class prevents shape guenching unit which characterized in that includes: the continuous heating furnace is used for continuously heating the slender shaft, a cantilever frame used for suspending the slender shaft is arranged above the continuous heating furnace, and the cantilever frame is provided with a plurality of lifting appliances used for suspending the slender shaft;
the device is characterized by also comprising three side pressure shafts which are arranged in a regular triangle shape and used for pressing the slender shaft, wherein the surfaces of the three side pressure shafts are respectively in contact connection with three supporting rolls which are used for driving the side pressure shafts to rotate, the supporting rolls are arranged outside the side pressure shafts in a regular triangle shape, and the supporting rolls are concentrically arranged in a triangle shape with the side pressure shafts and have the same directions of three angles; nozzles are also arranged between every two side pressing shafts; one of the support shafts is used as a driving shaft and is connected with a rotating motor for providing rotating power; the side pressure shaft is connected with a hydraulic device for providing pressure for the side pressure shaft.
2. The integral heating deformation-preventing quenching device for the fine long shafts as claimed in claim 1, wherein the hanger is a rotatable hanger.
3. The integral heating deformation-preventing quenching device for the fine long shafts as claimed in claim 1, wherein the nozzle is used for spraying a cooling medium to the fine long shafts, and the cooling medium can be liquid, mist or gas.
4. The integral heating deformation-preventing quenching device for the fine long shafts as claimed in claim 1, wherein the driving shaft is connected with a rotating motor through a driving belt.
5. The integral heating deformation-preventing quenching device for the fine long shafts as claimed in claim 1, wherein the length of the side pressing shaft is longer than that of the long shaft.
6. An integral heating deformation-preventing quenching process for fine long shafts comprises the following steps:
s1, firstly, the slender shaft is hung in a continuous heating furnace to be heated, and a workpiece is preheated, heated and preserved in the rotating process and then is discharged from the furnace;
s2, after discharging, the steel wire enters the central gaps of the three lateral pressure shafts in a centering manner, the steel wire quickly enters a quenching device, and under the state that a pressure measuring wheel is pressed, a rotating motor is started to drive the slender shaft to rotate for quenching and precooling;
s3, automatically adjusting the pressure of the side pressure shaft to about 30t through a hydraulic system after precooling, and spraying a cooling medium to rapidly cool the workpiece;
s4, taking out the workpiece and putting the workpiece into a low-temperature tempering furnace for tempering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011315284.5A CN112410529A (en) | 2020-11-20 | 2020-11-20 | Integral heating deformation-preventing quenching device and process for small long shafts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011315284.5A CN112410529A (en) | 2020-11-20 | 2020-11-20 | Integral heating deformation-preventing quenching device and process for small long shafts |
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| CN112410529A true CN112410529A (en) | 2021-02-26 |
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| CN202011315284.5A Pending CN112410529A (en) | 2020-11-20 | 2020-11-20 | Integral heating deformation-preventing quenching device and process for small long shafts |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115044749A (en) * | 2022-06-16 | 2022-09-13 | 中国航空工业标准件制造有限责任公司 | Device and method for preventing slender rod workpiece from being bent during heat treatment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07216456A (en) * | 1994-02-03 | 1995-08-15 | High Frequency Heattreat Co Ltd | Method for quenching/cooling of tubular member and device therefor |
| CN203021616U (en) * | 2013-01-08 | 2013-06-26 | 太原重工工程技术有限公司 | Hanging-type rotating quenching device of axle |
| CN205062135U (en) * | 2015-09-29 | 2016-03-02 | 中钢集团邢台机械轧辊有限公司 | Device for preventing slender axles class work piece response quenching distortion |
| CN205347520U (en) * | 2015-12-24 | 2016-06-29 | 湖南力升轧辊有限公司 | Long -pending suspension type heat treatment line of putting |
| CN205774681U (en) * | 2016-07-06 | 2016-12-07 | 燕山大学 | A kind of for major axis scanning quenching and the horizontal machine tool of band straightening mechanism |
| CN107164623A (en) * | 2017-05-27 | 2017-09-15 | 重庆市丰蕙达金属锻造有限公司 | Processing unit (plant) for semiaxis quenching machine |
-
2020
- 2020-11-20 CN CN202011315284.5A patent/CN112410529A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07216456A (en) * | 1994-02-03 | 1995-08-15 | High Frequency Heattreat Co Ltd | Method for quenching/cooling of tubular member and device therefor |
| CN203021616U (en) * | 2013-01-08 | 2013-06-26 | 太原重工工程技术有限公司 | Hanging-type rotating quenching device of axle |
| CN205062135U (en) * | 2015-09-29 | 2016-03-02 | 中钢集团邢台机械轧辊有限公司 | Device for preventing slender axles class work piece response quenching distortion |
| CN205347520U (en) * | 2015-12-24 | 2016-06-29 | 湖南力升轧辊有限公司 | Long -pending suspension type heat treatment line of putting |
| CN205774681U (en) * | 2016-07-06 | 2016-12-07 | 燕山大学 | A kind of for major axis scanning quenching and the horizontal machine tool of band straightening mechanism |
| CN107164623A (en) * | 2017-05-27 | 2017-09-15 | 重庆市丰蕙达金属锻造有限公司 | Processing unit (plant) for semiaxis quenching machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115044749A (en) * | 2022-06-16 | 2022-09-13 | 中国航空工业标准件制造有限责任公司 | Device and method for preventing slender rod workpiece from being bent during heat treatment |
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