CN109735793A - A kind of speed changer tapered sleeve carburizing and quenching method and its tooling - Google Patents
A kind of speed changer tapered sleeve carburizing and quenching method and its tooling Download PDFInfo
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- CN109735793A CN109735793A CN201910124088.0A CN201910124088A CN109735793A CN 109735793 A CN109735793 A CN 109735793A CN 201910124088 A CN201910124088 A CN 201910124088A CN 109735793 A CN109735793 A CN 109735793A
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- speed changer
- tapered sleeve
- carburizing
- quenching
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Abstract
The invention discloses a kind of speed changer tapered sleeve carburizing and quenching method and its toolings, are related to surface of automobile part technical field of heat treatment, including have the following steps, speed changer tapered sleeve is filled on special tooling by S1.；S2. speed changer tapered sleeve is sent into cleaning machine and is cleaned；S3. the speed changer tapered sleeve of cleaning treatment, which is sent into preheating furnace, before completing heats；S4. the speed changer tapered sleeve for completing the pre-heat treatment is sent into the heating room of gas carburizing mult-purpose chamber furnace after completing carburizing heat treatment, then transfers them to the interior progress quenching heat treatment of oil groove of gas carburizing mult-purpose chamber furnace；S5. the speed changer tapered sleeve for completing carburizing and quenching is sent into cleaning machine and is cleaned；S6. the speed changer tapered sleeve of cleaning treatment after the completion is sent into tempering furnace and carries out tempering.Speed changer tapered sleeve is filled in dedicated tooling and completes carburizing and quenching operation, improves speed changer tapered sleeve outer circle surface hardness and wearability to reach, and reduce the purpose of speed changer tapered sleeve inner hole hardness.
Description
Technical field
The present invention relates to surface of automobile part technical field of heat treatment, quench more particularly, to a kind of speed changer tapered sleeve carburizing
Burning hot processing method and its tooling.
Background technique
With the high speed development of Domestic Automotive Industry, car ownership and automobile annual turnover are greatly improved, joint product
Board and independent brand increasing the investment to automobile industry technical research, therefore, around high-quality, energy-saving and environmental protection theory
Various Advanced Heat Treatment Technologies are used widely in auto parts and components production.Heat treatment technics is that auto parts and components obtain institute
The important technical of the service performance of demand, while being also to realize product reliability, durability and the important guarantor of safety
Card is directly related to the stability and safety of automobile manipulation especially for the Surface heat-treatent of auto parts and components.
Automotive transmission is a set of for coordinating the speed change gear of rotating speed of automobile engine and wheel actual travel speed,
Speed changer can generate different gear ratio, so that car engine while the car is driving between engine and wheel
Machine plays optimum performance.
In automotive transmission, speed changer tapered sleeve is installed on parking system pull rod.Speed changer tapered sleeve is mostly by low-carbon alloy
Steel is made, and is installed in automotive transmission after machining, being heat-treated, due to equipment manufacturing technology and production and processing technology
The inner hole hardness of the limitation of technology, tapered sleeve is excessively high sometimes, and the tapered sleeve of inner hole excessive high hardness will lead to pull rod surface abrasion, very
To pull rod initial failure is caused, traffic safety is influenced.Pull rod abrasion also will cause a certain amount of metallic particles and peel off and enter change
In fast device lubricating oil, the metallic particles that pollutes transmission oil, influence speed changer cleaning inside degree, while peeling off may be with
Enter on the face of gear of occlusion with lubricating oil, cause the occlusion accuracy decline of gear, so influence the service life of speed changer with
And the driving safety of vehicle.
In the prior art, closure inner hole is matched generally by screw bolt and nut, to prevent metallic particles from peeling off simultaneously
It falls into transmission oil, or smears impermeable coating in the inner hole of speed changer tapered sleeve.Both the above solution behaviour
Make complex steps, speed changer tapered sleeve is easy to cause inner hole hardness higher because of above-mentioned measure failure during heat treatment, and after
Phase has no idea to detect the hardness of inner hole.Therefore, how while reducing speed changer tapered sleeve inner hole hardness, guarantee speed changer cone
Outer circle surface hardness and wearability are covered, insider's urgent problem to be solved is already known to.
Summary of the invention
In view of the above technical problems, one of the objects of the present invention is to provide a kind of speed changer tapered sleeve carburizing and quenchings
With tooling, speed changer tapered sleeve is filled in the tooling being made of pedestal, upright bar and nut cap, to reach in closing speed changer tapered sleeve
The purpose in hole, and then reach while reducing speed changer tapered sleeve inner hole hardness, do not influence speed changer tapered sleeve outer circle surface hardness and
The purpose of wearability.
To achieve the above object, following technical solution is provided: a kind of speed changer tapered sleeve carburizing and quenching tooling,
Include pedestal, be uniformly provided with mounting hole on the pedestal, the mounting hole is staggered on pedestal and constituting lattice-like
Structure, and vertical grafting is provided with upright bar at the mounting hole；Speed changer tapered sleeve is sheathed on vertically in the upright bar, the upright bar
Top cover be equipped with nut cap, and the nut cap closing be located at top speed changer tapered sleeve upper end bore openings.
By using above-mentioned technical proposal, the speed changer tapered sleeve of pending heat treatment operation is filled in upright bar by operating personnel
On, and nut cap is covered, to achieve the purpose that close speed changer tapered sleeve inner hole, and upright bar is uniform according to lattice-like structure on pedestal
It is arranged, i.e., the speed changer tapered sleeve in different upright bars is being carried out according to lattice-like structural arrangement with reaching the fast device tapered sleeve of raising
The purpose of permeability when heat treatment operation is conducive to the formation of speed changer tapered sleeve periphery hard layer.Speed changer tapered sleeve is filled out
Loaded in the tooling being made of pedestal, upright bar and nut cap, and passes through tooling and load speed changer tapered sleeve and complete carburizing and quenching
Operation so that reaching reduces speed changer tapered sleeve inner hole hardness, and improves the purpose of speed changer tapered sleeve outer circle surface hardness and wearability.
The present invention is further arranged to: the outside diameter of the upright bar and the diameter of bore difference of speed changer tapered sleeve are set as
0.05-0.15mm。
By using above-mentioned technical proposal, the outside diameter of upright bar and the diameter of bore difference range of speed changer tapered sleeve are arranged
Reach reduction by limiting carburizing effect to achieve the purpose that balance the inner hole hardness of speed changer tapered sleeve for 0.05-0.15mm
The purpose of speed changer tapered sleeve inner hole hardness.
In view of the above technical problems, the second object of the present invention is to provide a kind of speed changer tapered sleeve carburizing and quenching
Speed changer tapered sleeve is filled in dedicated tooling by method, then carries out carburizing and quenching, reduces speed changer tapered sleeve to reach
Inner hole hardness, and improve the purpose of speed changer tapered sleeve outer circle surface hardness and wearability.
To achieve the above object, following technical solution is provided: a kind of speed changer tapered sleeve carburizing and quenching method, packet
It includes and has the following steps, speed changer tapered sleeve raw material to be processed is filled on special tooling by S1. charging；S2. cleaning, will fill out before
Special tooling equipped with speed changer tapered sleeve raw material is sent into cleaning machine and is cleaned；S3. the pre-heat treatment, cleaning treatment fills out before completing
Special tooling equipped with speed changer tapered sleeve raw material is sent into preheating furnace, carries out preheating-heat retaining operation；S4. carburizing and quenching, will be complete
It is sent into the heating room of gas carburizing mult-purpose chamber furnace, leads at the special tooling for being filled with speed changer tapered sleeve raw material of the pre-heat treatment
Enter nitrogen, methanol and acetone, carbon potential in control process, and taken a breath, temperature-rise period, after completing carburizing heat treatment, will be loaded
There is the special tooling of speed changer tapered sleeve to be transferred in the oil groove of gas carburizing mult-purpose chamber furnace and carries out quenching heat treatment；S5. clear after
It washes, will be cleaned in the secondary feeding cleaning machine of the tooling for being filled with speed changer tapered sleeve for completing carburizing and quenching；S6. tempering, will
The special tooling for being filled with speed changer tapered sleeve raw material of cleaning treatment, which is sent into tempering furnace, after the completion carries out tempering.
By using above-mentioned technical proposal, speed changer tapered sleeve to be processed is filled in dedicated tooling by operating personnel,
Then special tooling is transported between preceding cleaning, the pre-heat treatment, rear cleaning, carburizing and quenching, rear cleaning and tempering manufacturing process, thus
Complete the carburizing and quenching operation of speed changer tapered sleeve raw material.The work of cleaning speed changer tapered sleeve is played in preceding cleaning and rear cleaning
With, it prepares for subsequent heat treatment operation, plays the role of improving speed changer tapered sleeve carburizing and quenching stability indirectly, into
And achieve the purpose that improve speed changer tapered sleeve outer circle hardened layer quality.During carburizing and quenching, it is filled in special tooling
The carburizing effect of speed changer tapered sleeve inner hole and periphery is different, forms hardened layer (or hard in the periphery of speed changer tapered sleeve
Layer), and the excessive high hardness of speed changer tapered sleeve inner hole will not be made, that is, speed changer tapered sleeve inner hole hardness is reduced, and improve speed changer
Tapered sleeve outer circle surface hardness and wearability.
The present invention is further arranged to: in the carburizing heat treatment of step S4, heating room is needed by heating-heat preservation-
Cool down three phases, and the holding temperature for heating room is set as 850-890 DEG C, and the cooling temperature setting for heating room is 800-840
℃。
By using above-mentioned technical proposal, 850-890 DEG C is set by the holding temperature range in carbon impregnation stage, to reach
Preferable carburizing effect is obtained, i.e., forms the preferable hard layer of hardness on the periphery of speed changer tapered sleeve；And by carbon impregnation stage
In cooling temperature range be set as 800-840 DEG C, i.e., after completing carburizing-holding stage, so that speed changer tapered sleeve is cooled to
Slightly below at the cooling temperature of holding temperature, then transfers in oil groove and is quenched, not only improve stable hard layer,
Advantageously reduce energy consumption extra in quenching treatment again (speed changer tapered sleeve has initial temperature before being quenched).
The present invention is further arranged to: after the temperature rise period and temperature-fall period after be respectively arranged with heating-thermophase with
Cooling-equal thermophase, and the soaking time of heating-thermophase is set as 15min-25min, the heat preservation of cooling-thermophase
Time is set as 25min-35min.
By using above-mentioned technical proposal, heating-thermophase, cooling-the setting of thermophase and to two stages
The purpose that soaking time is limited is for stablizing the structure and its property of speed changer tapered sleeve itself, subsequent in order to carry out
Heat treatment operation；Heating-thermophase is for the ease of carrying out subsequent carburizing isothermal holding, and cooling-thermophase is in order to just
In the subsequent quenching treatment of progress.
The present invention is further arranged to: in holding stage, carburizing process includes to blend two stages of diffusion by force, and strong
The carbon potential of infiltration is set as 1.0-1.2Cp%, and the carbon potential of diffusion is set as 0.7-0.9Cp%；In the temperature rise period, indoor carbon is heated
Gesture is set as 0.6-1.0Cp%, and in temperature-fall period, heats indoor carbon potential and is set as 0.7-0.9Cp%.
By using above-mentioned technical proposal, strong infiltration process and diffusion process in holding stage are matched, and are bored in speed changer
The periphery of set forms hard layer, and hard layer diffuses to inside speed changer tapered sleeve, has better stability；In temperature rise period
Carbon potential lower than the carbon potential in the strong infiltration stage, and the carbon potential in diffusion phase is higher than the carbon potential in the temperature rise period and seeps rank lower than strong
Carbon potential in section, i.e. the carbon potential of temperature rise period plays the role of preparatory carburizing, and the carbon potential of temperature-fall period plays stable state
Effect.
The present invention is further arranged to: seeping the processing time setting in stage by force for 60-150min, and the processing of diffusion phase
Time is set as 40-120min.
By using above-mentioned technical proposal, the processing time in strong infiltration stage and diffusion phase is limited, and seeps rank by force
The processing time of section needs to be longer than the processing time of diffusion phase, to obtain preferable carburizing effect.
The present invention is further arranged to: in the quenching treatment of step S4, the oil temperature in oil groove is set as 140-170 DEG C,
It needs to be stirred operation to the oil liquid in oil groove simultaneously, and mixing speed is set as 1000-1400r/min.
By using above-mentioned technical proposal, the oil temperature temperature in quenching treatment is limited, while being stirred operation,
And mixing speed is limited, to obtain preferable quenching effect.
The present invention is further arranged to: in step S2 and step S5, the purge chamber of cleaning machine is evacuated to low vacuum state,
And thermal cleaning liquid is filled with into it.
By using above-mentioned technical proposal, preceding cleaning and rear cleaning are for cleaning speed changer tapered sleeve outer round surface and interior
Hole surface in order to carry out subsequent heat treatment operation, and then obtains preferable thermal effectiveness；And it is true that purge chamber is evacuated to bottom
Dummy status and the reason of be passed through the cleaning solution by heating, is the effect in order to further increase speed changer tapered sleeve soil release
Fruit.
The present invention is further arranged to: the outer round surface of the speed changer tapered sleeve after tempering heat treatment be formed with a thickness of
The hardened layer of 0.3-0.5mm.
By using above-mentioned technical proposal, after a series of heat treatments, the hardened layer of speed changer tapered sleeve outer round surface
Thickness, which is set as 0.3-0.5mm, does not influence speed changer tapered sleeve that is, while obtaining hardened layer (or hard layer) of suitable thickness
The mechanical performance of itself.
In conclusion the invention has the following advantages:
First, using special tooling and special heat treatment process process, reach improve speed changer tapered sleeve outer round surface hardness and
Wearability, while the purpose of speed changer tapered sleeve inner hole hardness is reduced, and then reach and improve speed changer tapered sleeve stability in use and peace
The purpose of full property；
Second, speed changer tapered sleeve carburizing and quenching recruitment installing is calculated as detachable open type tooling, reduced realizing
The inner hole hardness of speed changer tapered sleeve, and while improve its outer circle surface hardness, it will not influence testing staff or operating personnel couple
The detection operation of speed changer tapered sleeve will not have an adverse effect to speed changer tapered sleeve carburizing and quenching effect；
Third, the reduction of speed changer tapered sleeve inner hole hardness, advantageously reduces and even be eliminated the metallic particles that abrasion generates, profit is improved
Cleannes inside lubricating oil and speed changer guarantee the smooth stable operation of speed changer, that is, are conducive to improve automotive transmission work
Stability and safety.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of speed changer tapered sleeve carburizing and quenching method；
Fig. 2 is the process flow chart of speed changer tapered sleeve carburizing and quenching processing；
Fig. 3 is the mounting structure schematic diagram of speed changer tapered sleeve special tooling Yu speed changer tapered sleeve.
Appended drawing reference: 1, pedestal；2, mounting hole；3, upright bar；4, nut cap.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment one:
As shown in Figure 1, a kind of speed changer tapered sleeve carburizing and quenching method, operating personnel are equal by speed changer tapered sleeve to be processed
It is even to be filled in the dedicated tooling of speed changer tapered sleeve carburizing and quenching, and when loading operation, guarantee that speed changer tapered sleeve is filled out
The permeability of dress, to guarantee carburizing and quenching effect.It is box in cleaning machine, preheating furnace, gas carburizing according to process flow
Transhipment is mounted with the special tooling of speed changer tapered sleeve between multipurpose furnace and tempering furnace, to complete the carburizing and quenching of speed changer tapered sleeve
Heat treatment operation improves speed changer tapered sleeve outer circle surface hardness and wearability to reach, and reduces the hard of speed changer tapered sleeve inner hole
Degree, and then achieve the purpose that improve speed changer tapered sleeve and transmission duty stability and safety.
According to process flow, the tooling for having loaded speed changer tapered sleeve needs successively to carry out preceding cleaning machine, preheating furnace, gas and seeps
Heating room, the fuel tank of gas carburizing mult-purpose chamber furnace, rear cleaning machine and the tempering furnace of carbon mult-purpose chamber furnace, that is, before being sequentially completed
Cleaning, the pre-heat treatment, Carburization Treatment, quenching treatment, rear cleaning and tempering, to complete entire carburizing and quenching
Technique.
Referring to figs. 1 and 2, before completing in preceding cleaning machine after cleaning, it is filled with the special tooling of speed changer tapered sleeve
Need to transfer to and carry out pre-add heat treatment in preheating furnace, and speed changer tapered sleeve raw material heated in preheating furnace after need to keep the temperature 15-
Then 30min is transported at gas carburizing mult-purpose chamber furnace again and carries out Carburization Treatment and quenching treatment, can both dry speed changer cone
Raw material is covered, and speed changer tapered sleeve raw material is made to obtain certain initial temperature, reduces the heat treatment of gas carburizing mult-purpose chamber furnace
In waste heat loss.
In the heating interior carry out Carburization Treatment of gas carburizing mult-purpose chamber furnace, need to control heating room according to the time
Room temperature is passed through nitrogen, methanol and acetone thereto, and according to the carbon potential in time control process, to complete ventilation, heating
Process.Oven heats include heating, heat preservation and cooling three phases, and the corresponding carbon potential of three phases is not also identical,
It needs to be adjusted according to time and process flow requirement, to obtain best Carburization Treatment effect.
It in the temperature rise period, needs to quickly complete warming temperature in 50-90s, and selection 1min is completed in the present embodiment
Warming temperature, subsequently into the equal thermophase of heating-of 15-25min, and in the present embodiment, selection 20min completes heating-samming
Stage, so that temperature rises to the holding temperature of holding stage, i.e., 850-890 DEG C.After holding stage, need fast in 50-90s
Speed completes cooling operation, and selection 1min completes cooling operation in the present embodiment, so that temperature is down to 800-840 DEG C, so
Enter the equal thermophase of cooling-of 25-35min afterwards, and selection 30min completes cooling-equal thermophase in the present embodiment, retransfers
Quenching treatment is completed in the oil groove of gas carburizing mult-purpose chamber furnace.The setting of heating-thermophase and cooling-thermophase,
The structure and performance for not only improving the speed changer tapered sleeve after keeping completing heating or cooling are stablized, while being convenient for subsequent heat
Handle operation.
In three heating, heat preservation and cooling different phases, carbon potential equally changes speed changer tapered sleeve.In heating rank
Section and the heating-carbon potential of thermophase are 0.6-1.0Cp%, and cool down and cool down-carbon potential of thermophase is 0.7-
0.9Cp%.In holding stage, Carburization Treatment includes to blend two stages of diffusion by force, and at the carbon potential of holding stage and carburizing
The reason time changes because the Carburization Treatment specific stage is different；Complete the speed changer of temperature rise period and heating-thermophase
Tapered sleeve initially enters the strong infiltration stage that the duration is 60-150min, carbon potential is 1.0-1.2Cp%, is subsequently into the duration
40-120min, the diffusion phase that carbon potential is 0.7-0.9Cp%, enter back into temperature-fall period and cooling-equal thermophase, thus in speed change
Device tapered sleeve periphery obtains preferable carburizing effect.
The speed changer tapered sleeve raw material for completing Carburization Treatment, which is transferred in the cup oil groove of gas carburizing mult-purpose chamber furnace, to carry out
Quenching treatment, and the oil temperature in oil groove is set as 140-170 DEG C, while needing to be stirred the oil liquid in oil groove operation, and
Mixing speed is set as 1000-1400r/min, selects 1200r/min in the present embodiment, to obtain preferable speed changer tapered sleeve
Quenching effect；And complete the speed changer tapered sleeve after quenching treatment and need to complete at cup oil groove to drain operation, it enters back into subsequent
Processing stage.
In preceding cleaning and rear cleaning, the special tooling for being filled with speed changer tapered sleeve raw material, which needs to be sent into cleaning machine, to be completed
Washing and cleaning operation, and be required to be evacuated to low vacuum state in cleaning machine, and be passed through thermal cleaning liquid, to reach cleaning removal speed changer cone
The purpose of the spots such as metallic particles for adhering on set outer surface and inner hole, and obtain preferable cleaning effect, so reach safety,
Steadily carry out the purpose of subsequent heat treatment operation.
The speed changer tapered sleeve of washing and cleaning operation, which is transported in tempering furnace, after the completion carries out tempering, is finally completed speed changer cone
The whole process of carburizing and quenching operation is covered, and is formed in the outer round surface of speed changer tapered sleeve with a thickness of 0.3-0.5mm's
Effective hardness layer, mainly acicular martensite have high rigidity and high-wearing feature.
The present embodiment is further elaborated below with reference to specific movement:
S1. it charges, speed changer tapered sleeve raw material to be processed is filled on special tooling；S2. cleaning, will be filled with speed changer before
The special tooling of tapered sleeve raw material is sent into cleaning in cleaning machine；S3. the pre-heat treatment, cleaning treatment is filled with speed changer before completing
The special tooling of tapered sleeve raw material is sent into preheating furnace, carries out preheating-heat retaining operation；S4. carburizing and quenching will complete the pre-heat treatment
Be filled with speed changer tapered sleeve raw material special tooling be sent into gas carburizing mult-purpose chamber furnace heating room in, be passed through nitrogen, first
Pure and mild acetone, carbon potential in control process, and taken a breath, temperature-rise period, after completing carburizing heat treatment, speed changer cone will be filled with
The special tooling of set, which is transferred in the oil groove of gas carburizing mult-purpose chamber furnace, carries out quenching heat treatment；S5. it cleans afterwards, will complete to seep
Cleaning in the secondary feeding cleaning machine of the tooling for being filled with speed changer tapered sleeve of carbon quenching；S6. tempering, by after the completion of at cleaning
The special tooling for being filled with speed changer tapered sleeve raw material of reason, which is sent into tempering furnace, carries out tempering.
Embodiment two:
As shown in figure 3, a kind of speed changer tapered sleeve carburizing and quenching tooling, i.e., at speed changer tapered sleeve carburizing and quenching heat
Special tooling in reason comprising there is the pedestal 1 for being set as square structure, multiple mounting holes 2 are uniformly provided on pedestal 1, and
Mounting hole 2 is interleaved to be set on pedestal 1 and constitutes lattice-like structure.Upright bar 3, and every row can be set for grafting vertically at mounting hole 2
It is separated with row's mounting hole 2 between upright bar 3, to achieve the purpose that improve speed changer tapered sleeve heat treatment permeability, and then reaches and mentions
The purpose of high speed changer tapered sleeve thermal effectiveness.Speed changer tapered sleeve there are two being arranged vertically in every upright bar 3, and upper layer speed changer
Big outer diameter one end of tapered sleeve covers at outside small outer diameter one end of lower layer's speed changer tapered sleeve, i.e. the top of lower layer's speed changer tapered sleeve is vertical
In the bottom end for extending upwardly into upper layer speed changer tapered sleeve；The top of upright bar 3 is arranged with nut cap 4, and upper layer speed changer tapered sleeve is closed in nut cap 4
Top end opening, and the diameter of bore difference of the outside diameter of upright bar 3 and speed changer tapered sleeve is set as 0.05-0.15mm, at this
In embodiment, selection is set as 0.1mm.The inner hole of speed changer tapered sleeve will not be at carburizing and quenching warm under the action of special tooling
Hard layer is formed during reason, and the hardness of inner hole is still able to satisfy its hardness requirement, but the periphery relative to speed changer tapered sleeve
It decreases for hardness.
The present embodiment is further elaborated below with reference to specific movement:
Speed changer tapered sleeve to be processed is stacked and is sheathed in upright bar 3 by operating personnel, and is alternatively arranged and adjacent speed changer is arranged
A column speed changer tapered sleeve is arranged again and arranges for tapered sleeve column, i.e. every setting column mounting hole 2 column, and there are two being arranged in each upright bar 3
Speed changer tapered sleeve, and make the top of the speed changer tapered sleeve of lower layer protrude into straight up upper layer speed changer tapered sleeve bottom end, so
It is arranged nut cap 4 in the upper end of upright bar 3 afterwards, so that the upper end opening of upper layer speed changer tapered sleeve is closed in nut cap 4, to complete speed change
The charging operation of device tapered sleeve.
Present embodiment is only explanation of the invention, is not limitation of the present invention, art technology
Personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as
All by the protection of Patent Law in scope of the presently claimed invention.
Claims (10)
1. a kind of speed changer tapered sleeve carburizing and quenching tooling, it is characterised in that: it include pedestal (1), the pedestal (1)
On be uniformly provided with mounting hole (2), the mounting hole (2) is staggered on pedestal (1) and constituting lattice-like structure, and described
Vertical grafting is provided with upright bar (3) at mounting hole (2)；Speed changer tapered sleeve is sheathed on vertically on the upright bar (3), the upright bar
(3) top cover is equipped with nut cap (4), and the nut cap (4) closing is located at the upper end bore openings of the speed changer tapered sleeve on top.
2. a kind of speed changer tapered sleeve carburizing and quenching tooling according to claim 1, it is characterised in that: the upright bar
(3) the diameter of bore difference of outside diameter and speed changer tapered sleeve is set as 0.05-0.15mm.
3. a kind of speed changer tapered sleeve carburizing and quenching method using the tooling as described in claim 1-2, it is characterised in that:
Including having the following steps,
S1. it charges, speed changer tapered sleeve raw material to be processed is filled on special tooling；
S2. cleaning before, the special tooling for being filled with speed changer tapered sleeve raw material is sent into cleaning machine and is cleaned；
S3. the pre-heat treatment, the special tooling for being filled with speed changer tapered sleeve raw material of cleaning treatment is sent into preheating furnace before completing,
It carries out preheating-heat retaining operation；
The special tooling for being filled with speed changer tapered sleeve raw material for completing the pre-heat treatment is sent into gas carburizing case by S4. carburizing and quenching
In the heating room of formula multipurpose furnace, it is passed through nitrogen, methanol and acetone, carbon potential in control process, and taken a breath, temperature-rise period, it is complete
After being heat-treated at carburizing, by the special tooling for being filled with speed changer tapered sleeve be transferred in the oil groove of gas carburizing mult-purpose chamber furnace into
Row quenching heat treatment；
S5. it cleans, will be cleaned in the secondary feeding cleaning machine of the tooling for being filled with speed changer tapered sleeve for completing carburizing and quenching afterwards；
The special tooling for being filled with speed changer tapered sleeve raw material of cleaning treatment after the completion is sent into tempering furnace by S6. tempering
Carry out tempering.
4. a kind of speed changer tapered sleeve carburizing and quenching method according to claim 3, it is characterised in that: in step S4
Carburizing heat treatment in, heating room is needed by heating-heat preservation-cooling three phases, and heats the holding temperature setting of room
It is 850-890 DEG C, the cooling temperature setting for heating room is 800-840 DEG C.
5. a kind of speed changer tapered sleeve carburizing and quenching method according to claim 4, it is characterised in that: in heating rank
Heating-thermophase and cooling-equal thermophase, and the heat preservation of heating-thermophase are respectively arranged with after section and after temperature-fall period
Time is set as 15min-25min, and the soaking time of cooling-thermophase is set as 25min-35min.
6. a kind of speed changer tapered sleeve carburizing and quenching method according to claim 4, it is characterised in that: in heat preservation rank
Duan Zhong, carburizing process include to blend two stages of diffusion by force, and the carbon potential seeped by force is set as 1.0-1.2Cp%, the carbon potential of diffusion
It is set as 0.7-0.9Cp%；In the temperature rise period, heats indoor carbon potential and is set as 0.6-1.0Cp%, and in temperature-fall period,
It heats indoor carbon potential and is set as 0.7-0.9Cp%.
7. a kind of speed changer tapered sleeve carburizing and quenching method according to claim 6, it is characterised in that: strong to seep the stage
Processing time setting be 60-150min, and the processing time setting of diffusion phase be 40-120min.
8. a kind of speed changer tapered sleeve carburizing and quenching method, feature according to claim 3-7 any one exist
In: in the quenching treatment of step S4, the oil temperature in oil groove is set as 140-170 DEG C, while need to the oil liquid in oil groove into
Row stirring operation, and mixing speed is set as 1000-1400r/min.
9. a kind of speed changer tapered sleeve carburizing and quenching method according to claim 3, it is characterised in that: in step S2
In step S5, the purge chamber of cleaning machine is evacuated to low vacuum state, and thermal cleaning liquid is filled with into it.
10. a kind of speed changer tapered sleeve carburizing and quenching method according to claim 3, it is characterised in that: pass through back
The outer round surface of burning hot treated speed changer tapered sleeve is formed with the hardened layer with a thickness of 0.3-0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910124088.0A CN109735793B (en) | 2019-02-20 | 2019-02-20 | Carburizing and quenching heat treatment method for transmission taper sleeve and tool thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910124088.0A CN109735793B (en) | 2019-02-20 | 2019-02-20 | Carburizing and quenching heat treatment method for transmission taper sleeve and tool thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109735793A true CN109735793A (en) | 2019-05-10 |
| CN109735793B CN109735793B (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910124088.0A Active CN109735793B (en) | 2019-02-20 | 2019-02-20 | Carburizing and quenching heat treatment method for transmission taper sleeve and tool thereof |
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| CN111519127A (en) * | 2020-05-29 | 2020-08-11 | 厦门真冈热处理有限公司 | Carburizing heat treatment method for obtaining high-quality pinion of car steering gear |
| CN111676441A (en) * | 2020-07-22 | 2020-09-18 | 厦门福鑫特工贸有限公司 | Heat treatment method and tool for motorcycle edge surface bolt |
| CN112322849A (en) * | 2020-11-10 | 2021-02-05 | 十堰澳贝科技有限公司 | Heat treatment process for ADI material of reference seat |
| CN113957228A (en) * | 2021-10-09 | 2022-01-21 | 上海丰东热处理工程有限公司 | Heat treatment process for transmission motor shaft |
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