CN106755910B - A kind of torsion bar shaft end thread hole is heat-treated anti-oxidation method - Google Patents

A kind of torsion bar shaft end thread hole is heat-treated anti-oxidation method Download PDF

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Publication number
CN106755910B
CN106755910B CN201710206734.9A CN201710206734A CN106755910B CN 106755910 B CN106755910 B CN 106755910B CN 201710206734 A CN201710206734 A CN 201710206734A CN 106755910 B CN106755910 B CN 106755910B
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threaded hole
torsion bar
heat treatment
high temperature
bar shaft
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CN106755910A (en
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付国辉
龙立志
王小臣
晏红卫
廖利芳
贺哲丰
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Zhuzhou Times New Material Technology Co Ltd
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Zhuzhou Times New Material Technology Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/28Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for plain shafts
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/68Temporary coatings or embedding materials applied before or during heat treatment

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

Abstract

A kind of torsion bar shaft end thread hole is heat-treated anti-oxidation method, with the tap tapping smaller than conventional criteria screw tap size before torsion bar shaft heat treatment, stays some allowances for finish so as to after heat treatment being capable of refine screw thread pore size;Sealing medium resistant to high temperature is filled up in threaded hole, high temperature resistant plug is inserted into threaded hole, plug can squeeze into the medium in hole at thread gaps when being inserted into threaded hole, play the role of sealing;Torsion bar shaft heat treatment, takes out plug after the completion, squeezes out medium, and refine screw thread pore size makes screw thread pore size meet technical requirements.The present invention does not process disposably in place before threaded hole heat treatment; stay some refine surpluses; can prevent deformed threads or other errors influences the precision of screw thread; during heat treatment; in the case where heated; graphited oil can expand so that thread pitch more seals, and especially graphited oil has good oxidation resistance in pyroprocess, plays the not oxidized effect of protection screw thread body.

Description

A kind of torsion bar shaft end thread hole is heat-treated anti-oxidation method
Technical field
The present invention relates in a kind of threaded hole anti-oxidation method, especially a kind of torsion bar shaft end thread hole heat treatment process Anti-oxidation method, belong to metal working process technical field.
Background technique
Current orbit vehicle anti-side rolling torsion rod axis end for antirust, dust-proof, anti-collide with, it will usually additional designs peace A dust cover is filled, dust cover needs to bore by being threadably mounted at torsion bar shaft end, therefore in torsion bar shaft several M6 or M8 screw threads Hole.Since torsion bar shaft heat treatment hardness used for rail vehicle requires relatively high, general hardness routine after 50HRC or so, heat treatment Processing method do not process the threaded hole, threaded hole can only be drilled before heat treatment, after heat treatment return one of screw thread, but by Long-time before quenching is kept the temperature at 900 DEG C or so, so that helicitic texture is oxidized seriously by part, heat treatment is caused to terminate Afterwards, by returning the threaded hole of screw thread silk, screw thread is detected using logical, no-go gage, it is qualified that a large amount of threaded hole cannot be detected by no-go gage.Through After crossing the oxidation of analysis threaded hole, it has been more than no-go gage arrowhead that the pitch diameter of thread, which becomes larger, and the torsion bar shaft for causing value expensive is because small Small threaded hole dimension overproof and scrap, to manufacturing enterprise bring weight huge economic loss.Therefore, it is necessary to one kind to be heat-treated Be protected to threaded hole the method for its oxidation in the process to reduce because screw thread is unqualified but probability that torsion bar shaft is scrapped, Reduce the economic loss of manufacturing enterprise.
By retrieving to domestic patent, discovery has the patent in terms of being protected to threaded hole, is exemplified below:
1. number of patent application CN200810238393.4, entitled " a kind of metal component screwed hole is at galvanizing anti-corrosion The patent of invention of guard method in reason " discloses a kind of protection side of metal component screwed hole in galvanizing preservative treatment Method, it mainly comprises the steps that the first step, prepares mastic, land plaster is poured into container, according to volume ratio land plaster: water =3-4: 1 pours into water, stirs;Described mastic is packed into the to be protected of metal parts with iron plate by second step In threaded hole, dense extrusion after filling;The metal parts of above-mentioned populated mastic is made galvanizing preservative treatment by third step;The Four steps, mastic is taken out, and cleans out threaded hole.Guard method provided by the invention can make metal part surface make heat During soaking zinc preservative treatment, do not increase the thickness of metal component screwed hole zinc-impregnating layer, avoids thread mill drilling due to increasing The thickness of zinc-impregnating layer is added to cause can not to install or other problems, it is ensured that metal parts soaks the matter of the screw thread of preprocessing after zinc Amount, this method is simple and easy, is greatly improved labor efficiency.
2. number of patent application CN201620710358.8, entitled " screw thread of the Al alloy parts in anode oxidation process The utility model patent of hole protection plug " discloses a kind of threaded hole protection plug of Al alloy parts in anode oxidation process, packet Flexible protection plug, the shape that protection plug matches in the threaded hole with Al alloy parts are included, protection plug has upper opening Inner hole, protection plug is divided into two sections up and down, and wherein upper section is the extension diameter section to offset that is open with the threaded holes of Al alloy parts, lower section For inserting paragraph, in smooth cylinder, the outer diameter of lower section is not less than the bottom diameter of threaded hole, when needing to protect threaded hole When, it is inserted into the inner hole of protection plug after stretching the lower section of protection plug and is inserted into threaded hole by matched pole, extract pole, Protection is squeezed into shape of threads after getting back into spring-go position and threaded hole seals.The utility model is simple and reasonable, good seal performance, makes With convenient, preferable protective effect can be played to threaded hole, and it is reusable, cost is relatively low.
Threaded hole is protected by smearing gypsum in threaded hole in above-mentioned patent 1, since gypsum is sintered at high temperature After can the contraction distortion due to dehydration, be easy cracking, collapse out, therefore not can solve the oxidation protection of threaded hole at high temperature and ask Topic.With protection plug insertion threaded hole in patent 2, threaded hole can only be protected not to be blocked, but still threaded hole cannot be protected not by oxygen Change.Therefore it still needs to improve.
Summary of the invention
The present invention is that solution causes when preceding pitch diameter of thread due to causing threaded hole oxidation in torsion bar shaft heat treatment process becomes larger The problem of torsion bar shaft is scrapped proposes the anti-oxidation method in a kind of heat treatment process of torsion bar shaft end thread hole, reduces torsion bar The scrappage of axis reduces the economic loss of enterprise.
The present invention in order to solve the above problem used by technological means are as follows: a kind of torsion bar shaft end thread hole be heat-treated oxygen Change method fills up sealing medium resistant to high temperature in threaded hole, before being heat-treated after torsion bar shaft threaded hole into threaded hole It is inserted into high temperature resistant plug, high temperature resistant plug can squeeze into the medium in hole at thread gaps when being inserted into threaded hole, play sealing Effect, while high temperature resistant plug blocks threaded hole, prevents sealing medium resistant to high temperature from dropping out out of threaded hole;Torsion bar shaft Heat treatment takes out high temperature resistant plug after the completion, squeezes out sealing medium resistant to high temperature, refine screw thread pore size makes screw thread pore size Meet technical requirements.
Further, sealing medium resistant to high temperature is graphited oil, during heat treatment, it is heated in the case where, stone Black lubricating grease can expand so that thread pitch more seals, and graphited oil has anti-oxidant well especially in pyroprocess Ability, while graphited oil includes graphite material, can be consumed by complete or unburnt mode and enter screw thread Oxygen in gap or threaded hole and to play protection screw thread body not oxidized, and due to graphite have good high-temperature stability and Lubrication property will not be sintered between high temperature resistant plug and the body of rod at high temperature, be easy to take out on high temperature resistant plug.
Further, sealing medium resistant to high temperature be high-temperature resistant coating, including high temperature organosilicon paint and inorganic silicon it is resistance to High-temperature coatings.
Further, high temperature resistant plug is the screw of same specification and model, screws in 1/3-2/5 threaded hole, both that threaded hole is close Blocking prevents from being oxidized in heat treatment process, and conveniently after heat treatment takes out screw.
Further, high temperature resistant plug is the small rotary table in the big one end in one end made of heat-resisting material, from small end 1/3- Diameter of section at 1/5 is equal sized with heat treatment preceding thread hole.
Further, some finishing are stayed with the tap tapping smaller than conventional criteria screw tap size before torsion bar shaft heat treatment Surplus is so as to after heat treatment being capable of refine screw thread pore size.
Further, the screw tap size of tapping 1-2 model smaller than conventional criteria screw tap.
Further, refine is carried out using size of the die hob to threaded hole after heat treatment, guarantees that screw thread pore size is full Sufficient technical requirements.
The beneficial effects of the present invention are:
1. the present invention fills in threaded hole and is inserted into high temperature resistant plug after medium, high temperature resistant plug is by extra a part Sealing medium resistant to high temperature is squeezed at thread gaps, plays the role of sealing, while high temperature resistant plug blocks threaded hole, Prevent sealing medium resistant to high temperature from dropping out out of threaded hole.
2. the present invention during heat treatment, be heated in the case where, graphited oil can expand so that thread pitch more Encryption envelope, graphited oil has good oxidation resistance, while graphitiferous material in graphited oil especially in pyroprocess Material, can consume the oxygen entered in thread gaps or threaded hole by complete or unburnt mode and play protection The not oxidized effect of screw thread body.
3. the present invention does not process disposably in place before threaded hole heat treatment, some refine surpluses are stayed, screw thread can be prevented Deformation or other errors influence the precision of screw thread.
4. the present invention removes high temperature resistant plug after the completion of heat treatment, using die hob refine thread size, guarantee spiral shell Line size meets technical requirements, and reducing leads to entire scrap of the product since threaded hole aoxidizes.
Detailed description of the invention
Fig. 1 is torsion bar shaft end thread pore structure schematic diagram of the present invention;
Fig. 2 is the anti-oxidation schematic diagram of threaded hole of the present invention;
Wherein: 1. torsion bar shafts, 2. sealing mediums resistant to high temperature, 3. high temperature resistant plugs, 4. threaded holes.
Specific embodiment
The following further describes the present invention with reference to the drawings.
Embodiment one
As Figure 1-Figure 2, a kind of torsion bar shaft is heat-treated the guard method of threaded hole, heat after 1 threaded hole of torsion bar shaft Before processing, sealing medium 2 resistant to high temperature is filled up in threaded hole 4, high temperature resistant plug 3 is inserted into threaded hole 4, plug 3 is inserted into The medium 2 in hole can be squeezed at thread gaps when threaded hole 4, play the role of sealing;Torsion bar shaft 1 is heat-treated, and is taken after the completion High temperature resistant plug 3 out, squeezes out sealing medium 2 resistant to high temperature, and 4 size of refine threaded hole makes 4 size of threaded hole meet technology and wants It asks.
Further, sealing medium 2 resistant to high temperature is graphited oil, is moistened graphite using syringe or butter oil syringe Consistent lubricant fills threaded hole 4, during heat treatment, it is heated in the case where, graphited oil can expand so that thread pitch more Encryption envelope, graphited oil has good oxidation resistance, while graphitiferous material in graphited oil especially in pyroprocess Material, can consume the oxygen entered in thread gaps or threaded hole by complete or unburnt mode and play protection Screw thread body is not oxidized, and since graphite has good high-temperature stability and lubrication property, at high temperature plug and the body of rod it Between will not be sintered, be easy plug is taken out.
Further, high temperature resistant plug 3 is the screw of model M8, screws in 1/3 threaded hole, and screw is by extra a part Graphited oil is squeezed at thread gaps, and not only the sealing of threaded hole 4, which is blocked, prevents from being oxidized in heat treatment process, but also conveniently in heat Screw is taken out after processing.
Further, it is stayed before the heat treatment of 1 threaded hole of torsion bar shaft with the tap tapping smaller than conventional criteria screw tap size Allowance for finish is so as to after heat treatment being capable of refine screw thread pore size.
Further, the specification of screw is M8, the screw tap model M6 of tapping before being heat-treated.
Further, screw is unscrewed after the completion of heat treatment and is removed, using the screw tap of model M8 by the stone in threaded hole 4 Black lubricating grease squeezes out, and carries out refine to the size of threaded hole 4, guarantees that 4 size of threaded hole meets technical requirements.
Embodiment two
The present embodiment principle and method are as in the first embodiment, difference is as follows:
The specification of screw is M6, the screw tap model M5 of tapping before being heat-treated.
Further, sealing medium resistant to high temperature be high-temperature resistant coating, including high temperature organosilicon paint and inorganic silicon it is resistance to High-temperature coatings.
High temperature resistant plug is the small rotary table in the big one end in one end made of heat-resisting material, rotary table from small end 1/3-1/5 at Diameter of section with heat treatment preceding thread hole 4 it is equal sized.
From above-described embodiment as can be seen that the invention has the following advantages:
1. the present invention fills in threaded hole and is inserted into high temperature resistant plug after medium, high temperature resistant plug is by extra a part Sealing medium resistant to high temperature is squeezed at thread gaps, plays the role of sealing, while high temperature resistant plug blocks threaded hole, Prevent sealing medium resistant to high temperature from dropping out out of threaded hole.
2. the present invention during heat treatment, be heated in the case where, graphited oil can expand so that thread pitch more Encryption envelope, graphited oil has good oxidation resistance, while graphitiferous material in graphited oil especially in pyroprocess Material, can consume the oxygen entered in thread gaps or threaded hole by complete or unburnt mode and play protection The not oxidized effect of screw thread body.
3. the present invention does not process disposably in place before threaded hole heat treatment, some refine surpluses are stayed, screw thread can be prevented Deformation or other errors influence the precision of screw thread.
4. the present invention removes high temperature resistant plug after the completion of heat treatment, using die hob refine thread size, guarantee spiral shell Line size meets technical requirements, and reducing leads to entire scrap of the product since threaded hole aoxidizes.

Claims (4)

1. a kind of torsion bar shaft end thread hole is heat-treated anti-oxidation method, it is characterised in that: after torsion bar shaft threaded hole at heat Before reason, sealing medium resistant to high temperature is filled up in threaded hole, high temperature resistant plug is inserted into threaded hole, when plug is inserted into threaded hole Medium in hole can be squeezed at thread gaps, play the role of sealing;Torsion bar shaft heat treatment, takes out high temperature resistant plug after the completion Son, squeezes out sealing medium resistant to high temperature, and refine screw thread pore size makes screw thread pore size meet technical requirements;
The sealing medium resistant to high temperature is graphited oil or high-temperature resistant coating, and the high-temperature resistant coating includes the resistance to height of organosilicon Thermo-paint and inorganic silicon high-temperature resistant coating;
The high temperature resistant plug is the screw of same specification and model, screws in 1/3-2/5 threaded hole, and both threaded hole sealing, which is blocked, prevents It is oxidized in heat treatment process, and conveniently after heat treatment takes out screw.
2. torsion bar shaft end thread as described in claim 1 hole is heat-treated anti-oxidation method, it is characterised in that: the refine spiral shell Pit size is to carry out refine using size of the die hob to threaded hole after being heat-treated, and guarantees that screw thread pore size meets technology and wants It asks.
3. torsion bar shaft end thread as described in claim 1 hole is heat-treated anti-oxidation method, it is characterised in that: the torsion bar shaft With the tap tapping smaller than conventional criteria screw tap size before heat treatment, some allowances for finish are stayed so as to after heat treatment being capable of essence Repair screw thread pore size.
4. torsion bar shaft end thread as claimed in claim 3 hole is heat-treated anti-oxidation method, it is characterised in that: the tapping Screw tap size 1-2 model smaller than conventional criteria screw tap.
CN201710206734.9A 2017-03-31 2017-03-31 A kind of torsion bar shaft end thread hole is heat-treated anti-oxidation method Active CN106755910B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108754095B (en) * 2018-09-12 2020-05-29 上海电气核电设备有限公司 Method for preventing threaded hole from being oxidized during heat treatment
CN112091530B (en) * 2020-07-24 2022-06-14 郑州沃华机械有限公司 Pin hole processing technology of melt pump shell
CN117867256B (en) * 2024-03-11 2024-05-28 陕西蓝通传动轴有限公司 Heat treatment equipment for processing transmission shaft for automobile

Citations (9)

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Publication number Priority date Publication date Assignee Title
CN200967620Y (en) * 2006-09-19 2007-10-31 内蒙古北方重工业集团有限公司 Axle end-face thread block
CN101440467A (en) * 2008-12-12 2009-05-27 南车四方车辆有限公司 Protecting method for metal component screwed hole in hot-dip galvanizing antiseptic treatment t
CN201558796U (en) * 2009-11-25 2010-08-25 中国科学院上海硅酸盐研究所 Plasma spraying protecting device for artificial acetabulum thread hole
CN201856172U (en) * 2010-09-18 2011-06-08 十堰东森汽车密封件有限公司 Screw thread protecting plug
CN201873738U (en) * 2010-10-27 2011-06-22 江苏奔航齿轮有限公司 Gear threaded hole carburizing protective device
CN203979064U (en) * 2014-08-04 2014-12-03 温州市胜隆标准件制造有限公司 Lubricating and antirust bolt
CN204113850U (en) * 2014-07-12 2015-01-21 图腾电子设备(昆山)有限公司 A kind of internal thread protection plug
CN105420466A (en) * 2015-12-02 2016-03-23 西安航天动力机械厂 Method for protecting screw hole in heat treatment
CN205821480U (en) * 2016-06-30 2016-12-21 龚典局 Al alloy parts screwed hole protection plug in anode oxidation process

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200967620Y (en) * 2006-09-19 2007-10-31 内蒙古北方重工业集团有限公司 Axle end-face thread block
CN101440467A (en) * 2008-12-12 2009-05-27 南车四方车辆有限公司 Protecting method for metal component screwed hole in hot-dip galvanizing antiseptic treatment t
CN201558796U (en) * 2009-11-25 2010-08-25 中国科学院上海硅酸盐研究所 Plasma spraying protecting device for artificial acetabulum thread hole
CN201856172U (en) * 2010-09-18 2011-06-08 十堰东森汽车密封件有限公司 Screw thread protecting plug
CN201873738U (en) * 2010-10-27 2011-06-22 江苏奔航齿轮有限公司 Gear threaded hole carburizing protective device
CN204113850U (en) * 2014-07-12 2015-01-21 图腾电子设备(昆山)有限公司 A kind of internal thread protection plug
CN203979064U (en) * 2014-08-04 2014-12-03 温州市胜隆标准件制造有限公司 Lubricating and antirust bolt
CN105420466A (en) * 2015-12-02 2016-03-23 西安航天动力机械厂 Method for protecting screw hole in heat treatment
CN205821480U (en) * 2016-06-30 2016-12-21 龚典局 Al alloy parts screwed hole protection plug in anode oxidation process

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