CN109112275B - Straightening method and straightening device for gear shaft after carburizing, quenching and deforming - Google Patents

Straightening method and straightening device for gear shaft after carburizing, quenching and deforming Download PDF

Info

Publication number
CN109112275B
CN109112275B CN201811109631.1A CN201811109631A CN109112275B CN 109112275 B CN109112275 B CN 109112275B CN 201811109631 A CN201811109631 A CN 201811109631A CN 109112275 B CN109112275 B CN 109112275B
Authority
CN
China
Prior art keywords
workpiece
supporting block
quenching
auxiliary supporting
pressurizing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811109631.1A
Other languages
Chinese (zh)
Other versions
CN109112275A (en
Inventor
胡昭南
赵芸
唐跃飞
唐治恒
刘强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Gearbox Co Ltd
Original Assignee
Chongqing Gearbox Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Gearbox Co Ltd filed Critical Chongqing Gearbox Co Ltd
Priority to CN201811109631.1A priority Critical patent/CN109112275B/en
Publication of CN109112275A publication Critical patent/CN109112275A/en
Application granted granted Critical
Publication of CN109112275B publication Critical patent/CN109112275B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • C21D1/673—Quenching devices for die quenching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/16—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention discloses a straightening method of a gear shaft after carburizing and quenching deformation, which comprises the following steps: horizontally placing a workpiece on the pressurizing supporting block and the auxiliary supporting block, so that the upper end surface of the pressurizing supporting block is attached to the spline end, and the auxiliary supporting block is positioned below the workpiece; adjusting the circumferential angle of the spline end to enable the gear end to be at the highest point; then, a pressing block is placed above the spline end, and finally quenching is carried out; the upper end faces of the pressurizing supporting block and the auxiliary supporting block are arc-shaped faces which can be correspondingly attached to the periphery of the workpiece, and the central axes of all the arc-shaped faces are collinear. The straightening method utilizes the characteristic that the workpiece has low structural strength and good plasticity in a high-temperature austenite state, so that the workpiece is straightened by using the dead weight during quenching; the straightening process does not need to utilize external force to locally pressurize the deformation area, so that the risk of workpiece damage is reduced. The invention also discloses a straightening device which has the beneficial effects.

Description

Straightening method and straightening device for gear shaft after carburizing, quenching and deforming
Technical Field
The invention relates to the technical field of part processing, in particular to a straightening method of a gear shaft after carburizing, quenching and deforming. In addition, the invention also relates to a straightening device for the carburized, quenched and deformed gear shaft.
Background
For a sun gear adopted in a wind power gear box, a gear shaft of the sun gear is of a hollow structure with longer length and smaller diameter, one end of the gear shaft is a gear tooth, and the other end of the gear shaft is a spline. For example, the length of the gear shaft is 1270mm, the diameter of the thinner part is 295mm, and the diameter of the inner hole is 175 mm. In the process of carburizing and quenching the gear shaft, the part is easy to bend and deform, even the jumping of the spline end reaches over 10mm after carburizing and quenching, so that subsequent processing cannot be carried out, and therefore the part after carburizing and quenching needs to be straightened.
In the prior art, parts are usually placed into an arch bridge shape protruding upwards, a tooth part is padded, and meanwhile, a protruding deformation area is pressurized at the middle position, so that the straightening process is realized. However, the end of the gear shaft is stressed during the pressurizing process, and the meshing teeth on the periphery of the gear are easily damaged; in addition, when the part is of a hollow structure, the middle part is pressurized and straightened to cause the thick part of the hollow wall to collapse and deform, so that the subsequent processing requirements of the part cannot be met.
In summary, how to reduce the damage to the parts during the straightening process is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a straightening method and a straightening device after carburizing, quenching and deforming a gear shaft, which can reduce damage to parts during straightening.
In order to achieve the above purpose, the invention provides the following technical scheme:
a straightening method of a gear shaft after carburizing, quenching and deforming comprises the following steps:
horizontally placing a workpiece on a pressurizing supporting block and an auxiliary supporting block, so that the upper end surface of the pressurizing supporting block is attached to the spline end of the workpiece, and the auxiliary supporting block is positioned below the workpiece; the upper end surfaces of the pressurizing supporting block and the auxiliary supporting block are arc-shaped surfaces which can be correspondingly attached to the periphery of the workpiece, and the central axes of all the arc-shaped surfaces are collinear;
adjusting the circumferential angle of the spline end to enable the height of the gear end to be at the highest point;
a pressing block is placed above the spline end to fix the position of the workpiece;
and quenching the workpiece until the periphery of the workpiece is attached to the auxiliary supporting block.
Preferably, quenching the workpiece comprises:
and heating the workpiece to a preset temperature, and continuing to heat the workpiece to the quenching temperature after the workpiece is subjected to temperature equalization for a preset time.
Preferably, the preset temperature ranges from 500 ℃ to 700 ℃, the preset time ranges from 2h to 4h, and the quenching temperature ranges from 780 ℃ to 880 ℃.
Preferably, the method further comprises, after quenching the workpiece:
horizontally taking out the workpiece, and cooling the workpiece by using quenching oil;
and tempering the workpiece after oil quenching.
Preferably, the tempering temperature ranges from 150 ℃ to 250 ℃.
Preferably, the auxiliary supporting block comprises a first auxiliary supporting block and a second auxiliary supporting block;
correspondingly, the horizontal placing of the workpiece on the pressurizing support block and the auxiliary support block comprises:
and arranging the first auxiliary supporting block, the second auxiliary supporting block and the pressurizing supporting block on a supporting flat plate according to the specification of the workpiece, so that when the upper end surface of the pressurizing supporting block is attached to the spline end, the first auxiliary supporting block is positioned below the gear end, and the second auxiliary supporting block is positioned below the shaft neck of the workpiece.
The application also provides a straightening device for the carburized and quenched deformed gear shaft, which is applied to any one of the straightening methods, and comprises the following steps:
the auxiliary supporting block is positioned below the workpiece in a state that the upper end surface of the pressurizing supporting block is attached to the spline end; the upper end surfaces of the pressurizing supporting block and the auxiliary supporting block are arc-shaped surfaces which can be correspondingly attached to the periphery of the workpiece, and the central axes of all the arc-shaped surfaces are collinear;
the pressing block can be arranged above the spline end to fix the position of the workpiece;
and the quenching furnace is used for quenching the workpiece.
Preferably, the device further comprises a support flat plate, wherein the auxiliary support block comprises a first auxiliary support block and a second auxiliary support block which are arranged on the support flat plate; and under the state that the upper end surface of the pressurizing supporting block is attached to the spline end, the first auxiliary supporting block is positioned below the gear end, and the second auxiliary supporting block is positioned below the shaft neck of the workpiece.
The invention provides a straightening method of a gear shaft after carburizing, quenching and deforming, which comprises the following steps: firstly, horizontally placing a workpiece on a pressurizing supporting block and an auxiliary supporting block, and attaching the upper end surface of the pressurizing supporting block to the spline end of the workpiece; and the circumferential angle of the spline end is adjusted to ensure that the height of the gear end is at the highest point; after the position of the workpiece is determined, a pressing block is placed at the spline end; and finally, quenching the workpiece until the workpiece is attached to the auxiliary supporting block.
In the heating process, along with the increase of the temperature of the workpiece, the strength of the workpiece is reduced, and the deformation of the workpiece can be partially recovered; when the heating temperature is raised to the austenitizing temperature, the structure of the workpiece is transformed from a sorbite structure to an austenite structure with low strength. Because the spline end is fixed and the gear end is higher, the gear end generates plastic deformation under the action of self weight and falls back downwards from the highest point until the workpiece is simultaneously supported by the auxiliary supporting block and the pressurizing supporting block. Because the upper end faces of the auxiliary supporting block and the pressurizing supporting block are attached to the periphery of the workpiece, and the central shafts of the arc-shaped faces of the auxiliary supporting block and the pressurizing supporting block are collinear, the axis of the workpiece is horizontal at the moment, and the workpiece is straightened.
According to the straightening method, in the straightening process, the characteristic that the strength of the workpiece is low at high temperature is utilized, the self weight is utilized to realize the straightening, external force does not need to be applied to the workpiece, and the risk of workpiece damage is reduced. The invention also provides a straightening device for the carburized and quenched deformed gear shaft, and a workpiece of the straightening device is not easy to damage in the straightening process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flow chart of an alignment method according to the present invention;
FIG. 2 is a flow chart of another alignment method provided by the present invention;
fig. 3 is a schematic structural diagram of the straightening device provided by the present invention in a working state;
FIG. 4 is a front view of the pressurized support block provided by the present invention;
fig. 5 is a top view of a pressurized support block provided by the present invention.
The reference numerals in FIGS. 1-5 are:
the device comprises a first auxiliary supporting block 1, a second auxiliary supporting block 2, a pressing block 3, a pressurizing supporting block 4 and a supporting flat plate 5.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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 core of the invention is to provide a straightening method of a gear shaft after carburizing, quenching and deforming, which is used for quenching a deformed workpiece and straightening the deformed workpiece by utilizing the self weight, thereby reducing the damage to the workpiece.
The invention provides a straightening method of a gear shaft after carburizing and quenching deformation, which comprises the following steps with reference to figure 1:
step S1, horizontally placing the workpiece on the pressurizing supporting block 4 and the auxiliary supporting block, so that the upper end surface of the pressurizing supporting block 4 is attached to the spline end of the workpiece, and the auxiliary supporting block is positioned below the workpiece; the upper end faces of the pressurizing supporting block 4 and the auxiliary supporting block are arc-shaped faces which can be correspondingly attached to the periphery of the workpiece, and the central axes of all the arc-shaped faces are collinear.
Specifically, referring to fig. 3 to 5, the pressurizing support block 4 is placed below the spline end of the workpiece, and the arc diameter of the upper end surface of the pressurizing support block is consistent with the outer edge diameter of the spline end of the workpiece, so that the upper end surface of the pressurizing support block 4 is attached to the outer periphery of the spline end. On one hand, the arc-shaped surface can enable the workpiece to be stressed uniformly, and the deformation of the contact part is reduced; on the other hand, the arc-shaped surface can also position the workpiece and restrain the deformation of the workpiece in the radial direction.
The auxiliary supporting block is placed below the workpiece, and the outer diameter of the upper end face of the auxiliary supporting block needs to be specifically determined by combining the size of the workpiece, for example, when the auxiliary supporting block is arranged below a workpiece journal, the arc-shaped diameter of the upper end face of the auxiliary supporting block is consistent with the outer diameter of the journal; if the auxiliary supporting block is arranged below the gear end of the workpiece, the diameter of the arc-shaped surface of the auxiliary supporting block is consistent with the outer diameter of the top circle of the gear. Specifically, the central axes of the arc-shaped surface of the pressurizing support block 4 and the arc-shaped surface of the auxiliary support block are located on the same straight line.
It should be noted that the specific dimensions of the thicknesses and heights of the auxiliary and pressure support blocks 4 need to be specifically selected in combination with the workpiece dimensions and the machining experience. For the height of the supporting block (comprising the auxiliary supporting block and the pressurizing supporting block 4), preferably, when the lower end face of the workpiece is attached to the upper end face of the supporting block, the distance between the workpiece and the lower end face of the supporting block is 100mm to 200mm, so that the flow of a quenching medium is ensured, and the quenching effect is ensured. If the thickness of the support block is too large, the contact area between the support block and the workpiece is large, which affects the quenching effect of the support portion, reduces the cooling rate of the workpiece support portion, and does not achieve sufficient hardness. If the thickness is too thin, the contact area with the workpiece is small, and there is a possibility that indentation may be caused on the surface of the workpiece during the supporting process. The application does not limit the specific specification of the support block.
And step S2, adjusting the circumferential angle of the spline end to enable the height of the gear end to be at the highest point.
Specifically, on the basis of ensuring the fitting of the spline end and the pressurizing support block 4, the workpiece is rotated along the central shaft of the spline end, and the rotation is stopped when the gear end is at the highest position, namely the highest point of the gear end.
And step S3, placing a pressing block 3 above the spline end to fix the position of the workpiece.
Specifically, the pressing block 3 and the pressurizing support block 4 clamp the spline end of the workpiece in the middle, and the gear end is kept unchanged at the highest point, so that the position of the workpiece is fixed; meanwhile, the pressing block 3 is not arranged above the auxiliary supporting block. Optionally, because the pressing block 3 is placed above the spline end, the lower end face of the pressing block 3 can adopt an arc-shaped face with the same diameter as the outer diameter of the spline end, so that the spline end is stressed uniformly.
And step S4, quenching the workpiece until the periphery of the workpiece is attached to the auxiliary supporting block.
Specifically, the fixed workpiece is quenched. In the actual operation process, the pressurizing supporting block 4, the auxiliary supporting block, the pressing block 3 and the workpiece can be horizontally placed on a quenching mould of the quenching furnace, and then the quenching mould is horizontally hung into the quenching furnace by using the lifting appliance for quenching and heating.
In the quenching process, along with the increase of the temperature of the workpiece, the strength of the workpiece is reduced, and the deformation of the workpiece can be partially recovered; when the heating temperature is raised to the austenitizing temperature, the structure of the workpiece is transformed from a sorbite structure to an austenite structure with low strength. Because the spline end is fixed and the gear end is suspended, the gear end generates plastic deformation under the action of self weight and falls back from the highest point to the lower part until the workpiece is simultaneously supported by the auxiliary supporting block and the pressurizing supporting block 4, and the workpiece after being straightened is shown as a dotted outline in fig. 3. Because the upper end surfaces of the auxiliary supporting block and the pressurizing supporting block 4 are attached to the periphery of the workpiece, and the central shafts of all arc-shaped surfaces are collinear, the axis of the workpiece is horizontal at the moment, and the workpiece is straightened.
According to the straightening method, the characteristics that the workpiece is low in structural strength and good in shaping in a high-temperature austenite state are utilized, the spline end is fixed, the gear tooth end is kept suspended, and the workpiece is deformed by the aid of the self weight of the workpiece; meanwhile, an auxiliary supporting block for restraining and preventing excessive deformation is arranged below the workpiece, so that the size of the workpiece can meet the machining requirement. The straightening process does not need to utilize external force to locally pressurize the deformation area, so that the risk of workpiece damage is reduced.
Further, in order to reduce the heating stress, on the basis of the above embodiment, quenching the workpiece includes: heating the workpiece to a preset temperature, keeping the temperature for a preset time, and then continuing heating to the quenching temperature.
Specifically, the quenching process adopts a sectional heating and temperature equalizing mode for processing, namely, the workpiece is heated to 600 +/-100 ℃, then temperature equalization is carried out for 2-4 hours, so that the heating speed is reduced, the deformation caused by thermal stress is reduced, and then the workpiece is quenched at the quenching temperature of 780-880 ℃ after being continuously heated. The heating to the quenching temperature can be continued for 2 to 5 hours. It can be understood that the value ranges of the preset temperature, the preset time, the quenching temperature and the heat preservation time can be specifically selected according to actual requirements, and are not limited to the parameter ranges.
Further, referring to fig. 2, in order to guarantee the hardness of the workpiece, on the basis of any one of the above embodiments, after quenching the workpiece, the method further includes:
step S5, horizontally taking out the workpiece, and cooling the quenching oil;
and step S6, tempering the workpiece after oil quenching.
Specifically, after quenching is finished, the whole quenching clamping fixture, the workpiece and the like are horizontally lifted out of the quenching furnace for cooling, the clamping fixture can be wholly immersed in an oil tank in the cooling process, the workpiece can move up and down and rotate, uniform cooling is guaranteed, and deformation of the workpiece is reduced. And after cooling, removing the stress of the workpiece by adopting a low-temperature tempering mode. Alternatively, the temperature range of tempering may be specifically 150 ℃ to 250 ℃.
Further, in order to ensure that the stress of the workpiece is uniform, on the basis of any one of the above embodiments, the auxiliary supporting block comprises a first auxiliary supporting block 1 and a second auxiliary supporting block 2; accordingly, the horizontally placing the workpiece on the pressurizing support block 4 and the auxiliary support block in step S1 includes: a first auxiliary supporting block 1, a second auxiliary supporting block 2 and a pressurizing supporting block 4 are arranged on a supporting flat plate 5 according to the specification of a workpiece, so that when the upper end face of the pressurizing supporting block 4 is attached to a spline end, the first auxiliary supporting block 1 is located below a gear end, and the second auxiliary supporting block 2 is located below a shaft neck of the workpiece.
Specifically, two auxiliary supporting blocks are arranged below the workpiece, wherein the first auxiliary supporting block 1 corresponds to the gear end position, the second auxiliary supporting block 2 corresponds to the journal position, and the workpiece is attached to the first auxiliary supporting block 1, the second auxiliary supporting block 2 and the pressurizing supporting block 4 in the quenching process. The three limit the workpiece, and the gear end and the shaft neck are prevented from moving downwards continuously in the quenching process.
In addition, considering that the use environment of the quenching mould may reach a high temperature of 920 ℃ and the quenching treatment is carried out, the quenching mould may have a certain deformation after a period of use, and in the case of a small deformation, the support plate 5 may be controlled to be horizontal, and a gasket may be arranged on the area where the support plate 5 is not flat and in contact with the quenching mould, so as to keep the support plate 5 horizontal and stable.
It can be understood that the workpiece has a certain machining allowance, and the subsequent machining can be directly performed when the workpiece only generates small deformation after carburization and quenching, so that before straightening, the workpiece can be subjected to size and deformation detection processing on a lathe, defective products which cannot meet the subsequent machining requirements are screened out according to the deformation detection result, and the defective products are subjected to straightening processing. In addition, after tempering and stress relief, deformation of the workpiece can be detected in terms of hardness, performance, metallographic structure and the like, and good products meeting the subsequent processing requirements can be sorted from the middle.
Corresponding to the methods provided by the above embodiments, the present application also provides a straightening device after carburizing, quenching and deforming a gear shaft, which includes: the auxiliary supporting block, the pressurizing supporting block 4, the pressing block 3 and the quenching furnace for quenching the workpiece; under the state that the upper end face of the pressurizing supporting block 4 is attached to the spline end, the auxiliary supporting block is positioned below the workpiece; the upper end surfaces of the pressurizing supporting block 4 and the auxiliary supporting block are arc-shaped surfaces which can be correspondingly attached to the periphery of the workpiece, and the central axes of all the arc-shaped surfaces are collinear; the pressing block 3 can be arranged above the spline end to fix the position of a workpiece.
In the straightening device, the upper end surface of the pressurizing support block 4 and the lower end surface of the pressing block 3 are both arc-shaped surfaces, and the diameters of the arc-shaped surfaces are the same and are consistent with the outer diameter of the spline end. The gear end or the shaft neck of the workpiece is suspended above the auxiliary supporting block. In the straightening process, the workpiece falls back downwards by using the self weight after the temperature of the workpiece is raised, so that the risk of workpiece damage is reduced.
Further, in order to optimize the using effect of the straightening device, on the basis of the above embodiment, the straightening device further includes a supporting flat plate 5, and the auxiliary supporting block includes a first auxiliary supporting block 1 and a second auxiliary supporting block 2 arranged on the supporting flat plate 5; under the state that the upper end face of the first auxiliary supporting block 1 is attached to the gear end, the first auxiliary supporting block 1 is located below the gear end, and the second auxiliary supporting block 2 is located below a shaft neck of a workpiece.
Specifically, in the using process, after the supporting block is placed on the supporting flat plate 5, the workpiece is placed above the supporting block, and then the supporting flat plate 5 is hoisted into the quenching furnace. It should be noted that the supporting flat plate 5 should have certain strength and machining precision, and have small deformation at high temperature, so as to ensure that the workpiece is kept in a straight state in the quenching process; in addition, the support plate 5 has a certain thickness, and if the support plate 5 is seriously deformed, the precision can be recovered by a finish machining method.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The straightening method and the straightening device for the gear shaft after carburizing, quenching and deforming are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (8)

1. A straightening method of a gear shaft after carburizing, quenching and deforming is characterized by comprising the following steps:
horizontally placing a workpiece on a pressurizing supporting block and an auxiliary supporting block, so that the upper end surface of the pressurizing supporting block is attached to the spline end of the workpiece, and the auxiliary supporting block is positioned below the workpiece; the upper end surfaces of the pressurizing supporting block and the auxiliary supporting block are arc-shaped surfaces which can be correspondingly attached to the periphery of the workpiece, and the central axes of all the arc-shaped surfaces are collinear;
adjusting the circumferential angle of the spline end to enable the height of the gear end to be at the highest point, and enabling the gear end to be placed above the auxiliary supporting block in a suspended mode;
a pressing block is placed above the spline end to fix the position of the workpiece;
quenching the workpiece until the periphery of the workpiece is attached to the auxiliary supporting block; wherein, in the quenching process, the heating temperature is increased to the austenitizing temperature, and the structure of the workpiece is transformed into an austenite structure.
2. The straightening method after the gear shaft carburizing and quenching deformation according to claim 1, wherein the quenching of the workpiece includes:
and heating the workpiece to a preset temperature, and continuing to heat the workpiece to the quenching temperature after the workpiece is subjected to temperature equalization for a preset time.
3. The straightening method after the gear shaft carburizing and quenching deformation according to claim 2, characterized in that the preset temperature is in the range of 500 ℃ to 700 ℃, the preset time is in the range of 2h to 4h, and the quenching temperature is in the range of 780 ℃ to 880 ℃.
4. The straightening method after the carburizing and quenching deformation of the gear shaft according to claim 2, further comprising, after quenching the workpiece:
horizontally taking out the workpiece, and cooling the workpiece by using quenching oil;
and tempering the workpiece after oil quenching.
5. The method for straightening the gear shaft after carburizing and quenching deformation according to claim 4, wherein the temperature range of the tempering is 150 ℃ to 250 ℃.
6. The straightening method of the gear shaft after carburizing and quenching deformation according to any one of claims 1 to 5, wherein the auxiliary support block comprises a first auxiliary support block and a second auxiliary support block;
correspondingly, the horizontal placing of the workpiece on the pressurizing support block and the auxiliary support block comprises:
and arranging the first auxiliary supporting block, the second auxiliary supporting block and the pressurizing supporting block on a supporting flat plate according to the specification of the workpiece, so that when the upper end surface of the pressurizing supporting block is attached to the spline end, the first auxiliary supporting block is positioned below the gear end, and the second auxiliary supporting block is positioned below the shaft neck of the workpiece.
7. A straightening device after carburizing and quenching deformation of a gear shaft is applied to the straightening method of any one of claims 1 to 6, and comprises the following steps:
the auxiliary supporting block is positioned below the workpiece in a state that the upper end surface of the pressurizing supporting block is attached to the spline end; the upper end surfaces of the pressurizing supporting block and the auxiliary supporting block are arc-shaped surfaces which can be correspondingly attached to the periphery of the workpiece, and the central axes of all the arc-shaped surfaces are collinear;
the pressing block can be arranged above the spline end to fix the position of the workpiece;
and the quenching furnace is used for quenching the workpiece.
8. The straightening device after the carburizing and quenching deformation of the gear shaft according to claim 7, further comprising a supporting flat plate, wherein the auxiliary supporting block comprises a first auxiliary supporting block and a second auxiliary supporting block which are arranged on the supporting flat plate; and under the state that the upper end surface of the pressurizing supporting block is attached to the spline end, the first auxiliary supporting block is positioned below the gear end, and the second auxiliary supporting block is positioned below the shaft neck of the workpiece.
CN201811109631.1A 2018-09-21 2018-09-21 Straightening method and straightening device for gear shaft after carburizing, quenching and deforming Active CN109112275B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811109631.1A CN109112275B (en) 2018-09-21 2018-09-21 Straightening method and straightening device for gear shaft after carburizing, quenching and deforming

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811109631.1A CN109112275B (en) 2018-09-21 2018-09-21 Straightening method and straightening device for gear shaft after carburizing, quenching and deforming

Publications (2)

Publication Number Publication Date
CN109112275A CN109112275A (en) 2019-01-01
CN109112275B true CN109112275B (en) 2020-05-26

Family

ID=64856165

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811109631.1A Active CN109112275B (en) 2018-09-21 2018-09-21 Straightening method and straightening device for gear shaft after carburizing, quenching and deforming

Country Status (1)

Country Link
CN (1) CN109112275B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113449400B (en) * 2021-07-20 2022-10-25 合肥工业大学 Ant colony optimization method for time-sharing migration alignment parameters of multi-journal camshaft
CN115044860B (en) * 2022-06-08 2024-01-26 重庆齿轮箱有限责任公司 Carburizing, quenching and bending deformation control method for large-scale slender gear shaft

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2205714C2 (en) * 2001-02-28 2003-06-10 Хрянин Виктор Николаевич Crank shaft straightening method
CN102039424A (en) * 2009-10-10 2011-05-04 上海船厂船舶有限公司 Method for straightening marine screw shaft
CN102198457B (en) * 2010-03-26 2013-06-05 广西玉柴机器股份有限公司 Method and tool for straightening bending deformation of crankshaft
CN203679069U (en) * 2013-12-30 2014-07-02 中国重汽集团济南动力有限公司 Straightening clamp for automobile transmission shaft assembly
CN205020554U (en) * 2015-10-13 2016-02-10 金环建设集团邯郸有限公司 School shape frock

Also Published As

Publication number Publication date
CN109112275A (en) 2019-01-01

Similar Documents

Publication Publication Date Title
CN109097551B (en) Heat treatment deformation control process method for slender gear shaft
CN109112275B (en) Straightening method and straightening device for gear shaft after carburizing, quenching and deforming
CN101838730B (en) Reversible deformation correcting method for elliptical gear ring subjected to deformation after carburization
JP2017515689A (en) Method of forming parts from sheet metal alloy
CN206599588U (en) A kind of induction heating apparatus of adjustable heated workpiece temperature field gradient
CN111136127A (en) Tension leveler tension leveling roller and heat treatment process
CN205062135U (en) Device for preventing slender axles class work piece response quenching distortion
CN103060821A (en) Gear carburization thermal treatment tool
JP4457985B2 (en) Manufacturing method of metal forgings
US3745805A (en) Creep annealing and a multiple pin fixture for use therein
JP3817764B2 (en) Ring manufacturing method and quenching deformation correction device
CN111136120B (en) Processing method of large-single-weight titanium and titanium alloy wire
CN112899612A (en) Gear carburizing and quenching process
JP2016144814A (en) Hot forging mold device and hot forging method using the same
CN106191397A (en) A kind of molding sheet metal component quenching clamping device
CN208883279U (en) Control the quenching hook groove tooling of the cooling bending deformation of elongated thin flat workpiece quenching
CN204369931U (en) A kind of long shaft part quenching frock
CN113373282A (en) Laser quenching process for main shaft of heavy-duty press
CN213538074U (en) Heat treatment CVT belt wheel axle carburizing material rack
CN211665141U (en) Combined type bell-type furnace annealing material rack
CN103146903B (en) Finishing method of hollow circular ring member
CN112126766A (en) Workpiece suspension device for shaft pin quenching
CN107262648B (en) Double-sided punching process for rotor bracket
CN109570278B (en) Large-scale crankshaft thermal correction method and device
CN217895698U (en) Cooling equipment for precise stainless steel annealing furnace

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant