CN102382951B - Induction quenching machining method for drive shaft for pump - Google Patents
Induction quenching machining method for drive shaft for pump Download PDFInfo
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- CN102382951B CN102382951B CN2011103584345A CN201110358434A CN102382951B CN 102382951 B CN102382951 B CN 102382951B CN 2011103584345 A CN2011103584345 A CN 2011103584345A CN 201110358434 A CN201110358434 A CN 201110358434A CN 102382951 B CN102382951 B CN 102382951B
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Abstract
The invention provides an induction quenching machining method for a drive shaft for a pump. The method comprises the following steps of: placing a heating inductor connected with a heating power supply at a part, to be quenched, of the drive shaft, positioning the drive shaft in the center of the heating inductor, starting the heating inductor, heating the part, , to be quenched, of the drive shaft to the temperature of between 800 and 900 DEG C, and meanwhile, quenching the drive shaft by using a blended quenching solution with the cooling temperature of between 20 and 40 DEG C; putting the drive shaft into a tempering furnace with the tempering temperature of 180+/-5 DEG C, and tempering; checking the deformation error of the drive shaft, and straightening the drive shaft when the deformation error of the drive shaft is more than 0.1 millimeter to control the deformation error within 0.1 millimeter; and finally, detecting the metallographic structure of the quenched part of the drive shaft and the depth of the hardened layer by adopting a metallographic method and a micro-hardness method, and finishing the machining operation of the drive shaft when the metallographic structure of the drive shaft reaches level 3-6 martensite structure and the depth of the hardened layer reaches 0.7 to 1.5 millimeters. Therefore, the drive shaft has the advantages of surface abrasion resistance and torsion strength.
Description
Technical field
The present invention relates to a kind of metallic substance quenching processing technology, particularly relate to the induction quenching working method of a kind of pump with drive shaft.
Background technology
Drive shaft plays keying action in oil pump, and along with the uninterrupted rotation of drive shaft, oil pump could continual eliminating liquid.The flow of oil pump is directly relevant with its rotating speed, and rotating speed is faster, and torsional strength and frictional force that oil pump bears are larger, thereby, very strict to the drive shaft hardness requirement of oil pump.
After above-mentioned oil pump is modified by high-quality 45# steel with drive shaft, make through roughing, precision work.This drive shaft bears huge twisting resistance and friction while rotating in oil pump, therefore, require this drive shaft that larger anti-torsional strength and high-wearing feature are arranged, otherwise easy fracture or wearing and tearing causes the oil pump cisco unity malfunction.In existing quenching complete processing, the drive shaft of preparation often occurs that after induction quenching the hardened layer at quenching position is inhomogeneous, causes drive shaft to be beated greatly, exceeds the problem of claimed range.
Therefore, how to design the quenching technology of this drive shaft, with surface abrasion resistance and the anti-torsional strength that improves this part, to avoid the above shortcoming, real is the current problem demanding prompt solution of dealer of association area.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide the induction quenching working method of a kind of pump with drive shaft, for solving the inhomogeneous and large problem of beating of drive shaft induction quenching post-hardening layer.
Reach for achieving the above object other relevant purposes, the invention provides the induction quenching working method of a kind of pump with drive shaft, at least comprise the following steps: step 1), the heating inductor that is connected with heating power supply is placed in to the position to be quenched of drive shaft, make described drive shaft be positioned at the center of described heating inductor, start described heating inductor the position to be quenched of this drive shaft is heated to 800～900 ℃, use the allotment hardening liquid that cooling temperature is 20～40 ℃ to be quenched simultaneously; Step 2), described drive shaft is positioned over to tempering in the tempering stove that tempering temperature is 180 ± 5 ℃; Step 3), check the distortion inaccuracy of described drive shaft, and, when the distortion inaccuracy of described drive shaft is greater than 0.1mm, to described drive shaft alignment operation, its distortion inaccuracy is controlled in 0.1mm; Step 4), adopt metallographic method and hardness method to detect metallographic structure and the case depth that described drive shaft completes the quenching position, and, when its metallographic structure reaches 3～6 grades of martensitic stuctures and case depth and reaches 0.7～1.5mm, complete the processing operation of described drive shaft.
Step 1 at pump of the present invention by the induction quenching working method of drive shaft), in, it is 1.3s that described heating inductor is heated to heat-up time of 800 ℃～900 ℃ by the position to be quenched of this drive shaft.Described heating inductor is in described drive shaft induction quenching process, and described drive shaft is with the rotating speed rotation of 120r/min.Described heating inductor is heated to 850 ℃ by the position to be quenched of this drive shaft.The cooling temperature of described allotment hardening liquid is 25 ℃.The THIF-502 quenchant that described allotment hardening liquid concentration is 6%～10%.The frequency of described heating power supply is 250KHz, and power is 100KW.
Step 3 at pump of the present invention by the induction quenching working method of drive shaft), in, the outer round surface that described distortion inaccuracy is described drive shaft is done shaftless during to revolution around datum axis, the full-scale reading recorded with dial gauge on assigned direction.
As mentioned above, induction quenching working method by pump of the present invention with drive shaft, can make drive shaft surface hardness reach 55-58HRC, the effective case depth 1.2mm left and right at each position of quench zone, not only hardness and case depth meet technical requirements, and beating of drive shaft also successfully be controlled in the 0.1mm of requirement, improve surface abrasion resistance and the anti-torsional strength of this part.The method converted products that adopts this patent to provide, the output of every 8 hours, 1600 left and right, has improved production efficiency effectively.
The accompanying drawing explanation
Fig. 1 is shown as the induction quenching process steps figure of pump of the present invention with drive shaft.
The element numbers explanation
The step of S1-S4 induction quenching working method
Embodiment
Below, by specific specific examples explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this specification sheets.The present invention can also be implemented or be applied by other different embodiment, and the every details in this specification sheets also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.
Refer to Fig. 1.It should be noted that, the diagram provided in the present embodiment only illustrates basic conception of the present invention in a schematic way, satisfy in graphic and only show with assembly relevant in the present invention but not component count, shape and size drafting while implementing according to reality, during its actual enforcement, kenel, quantity and the ratio of each assembly can be a kind of random change, and its assembly layout kenel also may be more complicated.
As shown in the figure, the invention provides the induction quenching working method of a kind of pump with drive shaft, comprise the following steps:
Step S1, the heating inductor that is connected with heating power supply is placed in to the position to be quenched of drive shaft, make described drive shaft be positioned at the center of described heating inductor, start described heating inductor the position to be quenched of this drive shaft is heated to 800～900 ℃, use the allotment hardening liquid that cooling temperature is 20～40 ℃ to be quenched simultaneously.
In the present embodiment, the frequency of selected heating power supply is 250KHz, and power is 100KW, and stable heating is provided.In the process of induction quenching operation, described heating inductor is in described drive shaft induction quenching process, described drive shaft is with the rotating speed rotation of 120r/min, described heating inductor is heated to 800 ℃～900 ℃ by the position to be quenched of this drive shaft simultaneously, be 1.3s heat-up time, through repetition test, it is 850 ℃ that described heating inductor is heated to preferred temperature by the position to be quenched of this drive shaft, or preferably temperature is 825 ℃, 875 ℃.The preferred time of heating is 1.3s, the THIF-502 quenchant that preferably allotment hardening liquid concentration is 6%～10%, the hardening liquid cooling performance that the preferred temperature of this quenchant is 25 ℃ is best, cooling fast in quenching process is highly advantageous to, quenching effect is outstanding, and, be beneficial to the homogeneity of the axial hardened layer of the penetration of hardness that guarantees drive shaft and drive shaft.
Step S2, be positioned over tempering in the tempering stove that tempering temperature is 180 ± 5 ℃ by described drive shaft; In the present embodiment, choose the temperature of 180 ℃ to described drive shaft tempering, through test, above-mentioned tempering temperature is conducive to produce the product of qualified hardness.
Step S3, check the distortion inaccuracy of described drive shaft, and when the distortion inaccuracy of described drive shaft is greater than 0.1mm, to described drive shaft alignment operation, its distortion inaccuracy is controlled in 0.1mm, in the present embodiment, the outer round surface that described distortion inaccuracy is described drive shaft is done shaftless to when revolution around datum axis, the full-scale reading recorded with dial gauge on assigned direction.Described alignment operation completes by straightener.
Step S4, adopt metallographic method and hardness method to detect metallographic structure and the case depth that described drive shaft completes the quenching position, and, when its metallographic structure reaches 3～6 grades of martensitic stuctures and case depth and reaches 0.7～1.5mm, complete the processing operation of described drive shaft.In the present embodiment, martensite (martensite) is a kind of organization name of ferrous material.Martensite (M) is the oversaturated sosoloid that carbon is dissolved in α-Fe, is the metastable phase that austenite is transformed into by diffusionless transformation.Its specific volume is greater than the tissues such as austenite, perlite, and this is to produce quenching stress, causes the major cause of strain cracking.Martensite is found at first in steel (middle, high-carbon): steel is heated to certain temperature (formation austenite) by cooling (quenching) rapidly, a kind of quenching structure that can make steel hardening, enhancing obtained.In the present embodiment, when the metallographic structure that completes position when the quenching that described drive shaft detected reaches 3～6 grades of martensites and case depth and reaches 0.7～1.5mm, regard as and meet the qualified requirement of product.
In sum, induction quenching working method by pump of the present invention with drive shaft, can make drive shaft surface hardness reach 55-58HRC, the effective case depth 1.2mm left and right at each position of quench zone, not only hardness and case depth meet technical requirements, and beating of drive shaft also successfully be controlled in the 0.1mm of requirement, improve surface abrasion resistance and the anti-torsional strength of this part.The method converted products that adopts this patent to provide, the output of every 8 hours, 1600 left and right, has improved production efficiency effectively.So the present invention has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, be modified or be changed above-described embodiment.Therefore, such as in affiliated technical field, have and usually know that the knowledgeable, not breaking away from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (1)
1. the induction quenching working method of a pump use drive shaft, is characterized in that, at least comprises the following steps:
Step 1), by being connected with frequency, it is the position to be quenched that heating inductor that 250KH and power are the 100KW heating power supply is placed in drive shaft, make described drive shaft be positioned at the center of described heating inductor, start described heating inductor the position to be quenched of this drive shaft is heated to 850 ℃, be 1.3s heat-up time, use the allotment hardening liquid of the THIF-502 quenchant that hardening liquid concentration that cooling temperature is 25 ℃ is 6%-10% to be quenched simultaneously, described heating inductor is in described drive shaft induction quenching process, described drive shaft is with the rotating speed rotation of 120r/min,
Step 2), described drive shaft is positioned over to tempering in the tempering stove that tempering temperature is 180 ± 5 ℃;
Step 3), check the distortion inaccuracy of described drive shaft, and when the distortion inaccuracy of described drive shaft is greater than 0.1mm, to described drive shaft alignment operation, its distortion inaccuracy is controlled in 0.1mm, the outer round surface that described distortion inaccuracy is described drive shaft is done shaftless to when revolution around datum axis, the full-scale reading recorded with dial gauge on assigned direction;
Step 4), adopt metallographic method and hardness method to detect metallographic structure and the case depth that described drive shaft completes the quenching position, and, when its metallographic structure reaches 3～6 grades of martensitic stuctures and case depth and reaches 0.7～1.5mm, complete the processing operation of described drive shaft;
By described working method, so that drive shaft surface hardness reaches 55-58HRC, the effective case depth 1.2mm at described quenching position left and right, beating of described drive shaft also successfully is controlled at 0.1mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103584345A CN102382951B (en) | 2011-11-11 | 2011-11-11 | Induction quenching machining method for drive shaft for pump |
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| CN2011103584345A CN102382951B (en) | 2011-11-11 | 2011-11-11 | Induction quenching machining method for drive shaft for pump |
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| CN102382951B true CN102382951B (en) | 2013-12-04 |
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| CN107365901A (en) * | 2017-06-06 | 2017-11-21 | 安徽腾龙泵阀制造有限公司 | A kind of processing method for improving chemical pump pump case case hardness |
| CN108220574A (en) * | 2017-12-30 | 2018-06-29 | 兴化东华齿轮有限公司 | Agricultural machinery drive shaft automatic sensing quenches system of processing and technique |
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| CN101445866A (en) * | 2008-12-18 | 2009-06-03 | 潍坊盛瑞动力机械科技有限公司 | Heat treatment process for water pump shaft connecting bearings |
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