CN104818377B - The heat treatment method and special tooling of a kind of chain wheel of mower - Google Patents
The heat treatment method and special tooling of a kind of chain wheel of mower Download PDFInfo
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- CN104818377B CN104818377B CN201510249450.9A CN201510249450A CN104818377B CN 104818377 B CN104818377 B CN 104818377B CN 201510249450 A CN201510249450 A CN 201510249450A CN 104818377 B CN104818377 B CN 104818377B
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Abstract
The invention discloses a kind of heat treatment method of chain wheel of mower and special tooling, its mass for carrying out sprocket wheel by special tooling is heat-treated, the special tooling is arranged in the mounting seat on installation chassis including installation chassis and array, the outer of mounting seat is provided with locating rod, and it is provided with through flow hole in the centre of mounting seat, the sprocket wheel string is stacked in mounting seat, the outer teeth groove of sprocket wheel is corresponding with the position of the locating rod of mounting seat, the endoporus of sprocket wheel is corresponding with the position of the through flow hole of mounting seat, and charging procedure is carried out in heat treatment process successively, preheating step, heating stepses, quenching Step, tempering step, the temperature parameter and time parameter of each step are targetedly set according to the charging method of special tooling, it is achieved thereby that preferable thermal effectiveness, not only handled by mass and improve production efficiency, and the deflection of heat treatment can be controlled, improve the hardness precision of sprocket wheel.
Description
Technical field
The present invention relates to technical field of heat treatment, the heat treatment method of particularly a kind of chain wheel of mower and this method
Heat treatment special.
Background technology
Sprocket wheel is the common part in gearbox, in the gearbox of hay mover, and national standard (GB14212) is to sprocket wheel
The standard regulation of axial runout cannot be greater than 0.3mm, need to control the deflection and hardness of sprocket wheel in heat treatment production.
In traditional sprocket tooth part Technology for Heating Processing, sprocket tooth part induction heat processing (45 carbon steel) is all to use rotating sprocket
Quenching oil, i.e. sprocket wheel are sensed is heated to after hardening heat for overall immersion, and being directly immersed in cooling in quenching oil in rotation status quenches
Fire, is tempered again after taking-up, but normally results in sprocket wheel generation teeth portion crackle or phenomenon of rupture, Er Qiebiao using this processing step
The hardness in face is uneven, i.e., the hardness of same position (such as tooth top, bottom of the tooth) differs more, 10 degree of at least up to HRC (Rockwell hardness)
More than, deformed after being also inevitably heat-treated in addition, the wave transformation particularly distorted is difficult more flat.
The content of the invention
The present invention is to solve the above problems, there is provided the heat treatment method and special tooling of a kind of chain wheel of mower, not only
The deflection of heat treatment can be controlled, and improves the hardness precision of sprocket wheel.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of heat treatment method of chain wheel of mower, it is characterised in that comprise the following steps：
Charging procedure：By each sheet sprocket wheel vertically string be stacked on special tooling, the special tooling include installation chassis with
And array is arranged in the mounting seat on installation chassis, the outer of mounting seat is provided with locating rod, and in the centre of mounting seat provided with logical
Discharge orifice, the sprocket wheel string is stacked in mounting seat, and the outer teeth groove of sprocket wheel is corresponding with the position of the locating rod of mounting seat, sprocket wheel it is interior
Hole is corresponding with the position of the through flow hole of mounting seat；
Preheating step：Sprocket wheel in the special tooling and frock is placed in heating furnace and preheated, heating-up temperature is
810-830 DEG C, the heat time is 25-40min；
Heating stepses：The temperature of rise heating furnace is heated again to sprocket wheel, and heating-up temperature is 860-880 DEG C, heating
Time is 135-165min；
Quenching Step：Sprocket wheel in the special tooling and frock is placed in quenching oil and quenched, in quenching process
Middle frock and sprocket wheel are motionless and stir quenching oil, and quenching oil temperature is 70-80 DEG C, and the cool time is 25-35min；
Tempering step：Sprocket wheel in the special tooling and frock is placed in tempering oil and is tempered, oil temperature is tempered
For 170-180 DEG C, tempering time is 4-6h.
It is preferred that, in described charging procedure, longitudinally and/or laterally logical is additionally provided with the installation chassis of special tooling
Chute, the through flow hole of the mounting seat of each array arrangement is connected with described through-flow groove.
It is preferred that, in described charging procedure, mainly by stainless steel tube, by each sheet sprocket wheel, string is stacked in specially vertically
Recruitment is loaded onto, and each sheet sprocket wheel aligns first is inserted in described stainless steel tube, and stainless steel tube accessary sprocket wheel endoporus is passed through, and then will
The described mounting seat of the stainless steel tube alignment of sprocket wheel is cased with, sprocket wheel string is stacked in mounting seat, finally by described stainless steel tube
Extract out.
It is preferred that, in described charging procedure, described locating rod includes two and is separately positioned on the both sides of sprocket wheel, will
After sprocket wheel string is stacked in mounting seat, two locating rods also on top sprocket wheel are arranged with iron wire, and the sprocket wheel is consolidated
It is scheduled on mounting seat, in the space that two locating rods and iron wire are surrounded.
It is preferred that, in described preheating step, heating-up temperature is 820 DEG C, and the heat time is 30min；
In described heating stepses, heating-up temperature is 870 DEG C, and the heat time is 150min；
In described quenching Step, the mixing speed of quenching oil is 715r/min, and quenching oil temperature is 75 DEG C, cool time
For 30min；
In described tempering step, tempering oil temperature is 170 DEG C, and tempering time is 4h.
It is preferred that, the material of described sprocket wheel is 42CrMo or AISI4142.
In addition, present invention also offers a kind of heat treatment special of chain wheel of mower, it is characterised in that：The special tool
Dress includes installation chassis and array is arranged in mounting seat on installation chassis, and the outer of mounting seat is provided with locating rod, mounting seat
Centre be provided with through flow hole, the sprocket wheel vertically string be stacked in mounting seat, the position of the endoporus of sprocket wheel and the through flow hole of mounting seat
Corresponding, the outer teeth groove of sprocket wheel is corresponding with the position of the locating rod of mounting seat, and locating rod includes two and is separately positioned on
The both sides of sprocket wheel.
It is preferred that, through-flow groove longitudinally and/or laterally, the installation of each array arrangement are additionally provided with described installation chassis
The through flow hole of seat is connected with described through-flow groove.
It is preferred that, two locating rods also on top sprocket wheel are arranged with iron wire, the sprocket wheel be fixed on mounting seat,
In the space that two locating rods and iron wire are surrounded.
It is preferred that, described array is arranged in the mounting seat on installation chassis, the centre-to-centre spacing between adjacent mounting seat
More than the maximum outside diameter of the sprocket wheel, to form oil-gap between adjacent sprocket wheel.
The beneficial effects of the invention are as follows：
(1), in sprocket wheel heat treatment process of the present invention, heating is carried out stage by stage, is first preheated and is raised temperature heating again, preheating step
Suddenly the deflection of sprocket wheel can be reduced, heating stepses make sprocket wheel have more preferable quenching degree, and when heating-up temperature of the present invention and heating
Between setting mainly according to the sprocket wheel charging method of described special tooling special setting so that the outer toothed portion and wheel of sprocket wheel
Center portion can have preferable quenching degree；
(2), the present invention is according to the quenching hardness obtained by described preheating temperature and heating-up temperature, there is provided corresponding time
Fiery temperature and tempering time, are required, and be conducive to elimination stress more thorough with ensuring that the sprocket wheel hardness after tempering is met, it is ensured that
The obdurability of sprocket wheel so that sprocket wheel is easy to crack in use；Generally, the hardness after sprocket wheel quenching of the present invention
Hardness after HRC58-61, tempering is in HRC54-55；
(3) it is heat-treated using the special tooling of the present invention, mass can not only be realized, rationally filled using frock
Stove, can save the time for taking on stove and handling sprocket wheel, improve frock efficiency；
(4), the method that conventional method uses single-piece heating quenching, not only efficiency is low, and deformation is big, and quality does not reach will
Ask；The present invention carries out batch heat treatment by special tooling to sprocket wheel, and sprocket wheel string stacks, can keep after heat treatment compared with
Small deflection, generally, the deflection after sprocket wheel heat treatment of the present invention can be controlled within 0.01mm, improve production
The qualification rate of product；
(5), it is heat-treated using the special tooling of the present invention, passes through the design of locating rod and through flow hole so that sprocket wheel
Outer toothed portion and wheel center portion fully can be contacted with quenching oil and tempering oil so that sprocket wheel can be heated uniformly and uniform cold
But, sprocket wheel inner hole quenching oil inlet quantity can be effectively controlled, inner edge, the outer rim position of quenching process middle sprocket reach thermal balance, so that
It ensure that the integral hardness of sprocket wheel evenly.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, this hair
Bright schematic description and description is used to explain the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the general flow chart of the heat treatment method of chain wheel of mower of the present invention；
Fig. 2 is the dimensional structure diagram of the heat treatment special of chain wheel of mower of the present invention；
Fig. 3 is Fig. 2 overlooking the structure diagram；
Fig. 4 is the structural representation of the chain wheel of mower of the present invention；
Fig. 5 is the sprocket wheel structural representation of alignment bosses on stainless steel tube before special tooling is loaded；
Fig. 6 is the effect diagram one that sprocket wheel is arranged on heat treatment special；
Fig. 7 is the effect diagram two that sprocket wheel is arranged on heat treatment special；
In figure：
10- installation chassis；11- is through-flow groove；
20- mounting seats；21- through flow holes；22- locating rods；
30- sprocket wheels；31- endoporus；32- outer teeth grooves；
40- stainless steel tubes.
Embodiment
In order that technical problems, technical solutions and advantages to be solved are clearer, clear, tie below
Closing drawings and Examples, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
As shown in figure 1, a kind of heat treatment method of chain wheel of mower of the present invention, it comprises the following steps：
Charging procedure：By each sheet sprocket wheel, string is stacked on special tooling (as shown in Figure 2 and Figure 3) vertically, the special tooling
The mounting seat 20 on installation chassis 10 is arranged in including installation chassis 10 and array, the outer of mounting seat 20 is provided with locating rod
22, and in the centre of mounting seat 20 provided with through flow hole 21, the string (as shown in Figure 4) of sprocket wheel 30 is stacked in mounting seat 20, sprocket wheel
30 outer teeth groove 32 is corresponding with the position of the locating rod 22 of mounting seat 20, the endoporus 31 of sprocket wheel 30 and the through flow hole of mounting seat 20
21 position is corresponding (as shown in Figure 6 and Figure 7)；
Preheating step：Sprocket wheel 30 in the special tooling and frock is placed in heating furnace and preheated, heating-up temperature
For 810-830 DEG C, the heat time is 25-40min；
Heating stepses：The temperature of rise heating furnace is heated again to sprocket wheel 30, and heating-up temperature is 860-880 DEG C, plus
The hot time is 135-165min；
Quenching Step：Sprocket wheel in the special tooling and frock is placed in quenching oil and quenched, in quenching process
Middle frock and sprocket wheel are motionless and stir quenching oil, and quenching oil temperature is 70-80 DEG C, and the cool time is 25-35min；
Tempering step：Sprocket wheel in the special tooling and frock is placed in tempering oil and is tempered, oil temperature is tempered
For 170-180 DEG C, tempering time is 4-6h.
As preferred embodiment, in described charging procedure, longitudinal direction is additionally provided with the installation chassis 10 of special tooling
And/or horizontal through-flow groove 11, the through flow hole 21 of the mounting seat 20 of each array arrangement is connected with described through-flow groove 11.Institute
The locating rod 22 stated includes two and is separately positioned on the both sides of sprocket wheel 30, after the string of sprocket wheel 30 is stacked in mounting seat 20, also exists
Two locating rods 22 on top sprocket wheel 30 are arranged with iron wire (not shown), and the sprocket wheel 30 is fixed on into installation
In the space that seat 20, two locating rods 22 and iron wires are surrounded；Because sprocket wheel 30 need not rotate or other in heat treatment process
Motion, generally need to only be positioned with locating rod 22, in order to prevent in handling process middle sprocket 30 in the present embodiment
Positioning is more stable, there is provided two locating rods 22, and pinions with iron wire fixation, and operating process is more convenient.In charging, mainly
By stainless steel tube 40, by each sheet sprocket wheel 30, string is stacked on special tooling vertically, before charging, each sheet sprocket wheel 30
Described stainless steel tube 40 is inserted in alignment first, and the accessary sprocket wheel endoporus 31 of stainless steel tube 40 passes through (as shown in Figure 5), then will be cased with
The stainless steel tube 40 of sprocket wheel 30 is directed at described mounting seat 20, and the string of sprocket wheel 30 is stacked in mounting seat 20, finally by it is described not
Rust steel pipe 40 is extracted out；Generally, first each sprocket wheel 30 is alignd before stainless steel tube 40 is inserted into mounting seat 20
Processing, for example, can conspire to create sprocket wheel a string with first stainless steel rod iron one by one, then with second stainless steel rod iron and the
A piece stainless steel rod iron side by side, and by selecting sprocket wheel the external tooth of sprocket wheel is alignd, then by first stainless steel of the sprocket wheel that aligns
Rod is inserted in stainless steel tube.Finally, the special tooling for installing sprocket wheel is loaded material frame, thick sprocket wheel can fill 1.5 ten thousand per frame,
Thin sprocket wheel can fill 1.8 ten thousand per frame, then will install the fixed tray of the sealed Multipurpose box type heating furnace of material frame loading of sprocket wheel
It is upper to be preheated and heated, general two baskets of a stove.
As preferred embodiment, in described preheating step, heating-up temperature is 820 DEG C, and the heat time is 30min；Institute
In the heating stepses stated, heating-up temperature is 870 DEG C, and the heat time is 150min；In described quenching Step, the stirring of quenching oil
Speed is 715r/min, and quenching oil temperature is 75 DEG C, and the cool time is 30min；In described tempering step, tempering oil temperature is
170 DEG C, tempering time is 4h.Certainly, above-mentioned parameter is being adjusted and had in certain margin of tolerance before and after preferred parameter
It is standby that quenching oil temperature is for example changed to 74 DEG C from 75 DEG C with identical technique effect of the present invention, or by cool time 30min
29min is changed to, the mixing speed of quenching oil is changed to 700r/min from 715r/min, is all considered to be the model for falling into the present invention
Enclose；And above-mentioned parameter can be according to different sprocket wheel materials or different dimensions in foregoing temperature range and time model
It is adjusted in enclosing.
In the present embodiment, the material of described sprocket wheel is 42CrMo or AISI4142.
As shown in Figures 2 to 4, present invention also offers a kind of heat treatment special of chain wheel of mower, the special tool
Dress includes installation chassis 10 and array is arranged in mounting seat 20 on installation chassis 10, and the outer of mounting seat 20 is provided with locating rod
22, the centre of mounting seat 20 is provided with through flow hole 21, and string is stacked in mounting seat 20 sprocket wheel 30 vertically, the endoporus 31 of sprocket wheel 30 with
The position of the through flow hole 21 of mounting seat 20 is corresponding, and the outer teeth groove 32 of sprocket wheel 30 is relative with the position of the locating rod 22 of mounting seat 20
Answer, and locating rod 22 includes two and is separately positioned on the both sides of sprocket wheel 30.
In the present embodiment, through-flow groove 11 longitudinally and/or laterally is additionally provided with described installation chassis 10, each array cloth
The through flow hole 21 for the mounting seat 20 put is connected with described through-flow groove 11；Two locating rods also on top sprocket wheel 30
22 are arranged with iron wire (not shown), the sky that the sprocket wheel 30 is fixed on mounting seat 20, two locating rods 22 and iron wire are surrounded
In；In addition, described array is arranged in the mounting seat 20 on installation chassis 10, the centre-to-centre spacing between adjacent mounting seat 20
More than the maximum outside diameter of the sprocket wheel 30, to form oil-gap between adjacent sprocket wheel 30.
It should be noted that each embodiment in this specification is described by the way of progressive, each embodiment weight
Point explanation be all between difference with other embodiment, each embodiment identical similar part mutually referring to.
For heat treatment special embodiment, because it is similar to embodiment of the method part, so fairly simple, the phase of description
Part is closed referring to the part of embodiment of the method to illustrate.
The preferred embodiments of the present invention have shown and described in described above, it should be understood that the present invention is not limited to this paper institutes
The form of disclosure, is not to be taken as the exclusion to other embodiment, and can be used for various other combinations, modification and environment, and energy
Enough in invention contemplated scope herein, it is modified by the technology or knowledge of above-mentioned teaching or association area.And people from this area
The change that is carried out of member and change do not depart from the spirit and scope of the present invention, then all should appended claims of the present invention protection
In the range of.
Claims (10)
1. a kind of heat treatment method of chain wheel of mower, it is characterised in that comprise the following steps：
Charging procedure：By each sheet sprocket wheel, string is stacked on special tooling vertically, and the special tooling includes installation chassis and battle array
Row are arranged in the mounting seat on installation chassis, and the outer of mounting seat is provided with locating rod, and is provided with through flow hole in the centre of mounting seat,
The sprocket wheel string is stacked in mounting seat, and the outer teeth groove of sprocket wheel is corresponding with the position of the locating rod of mounting seat, the endoporus of sprocket wheel with
The position of the through flow hole of mounting seat is corresponding；
Preheating step：Sprocket wheel in the special tooling and frock is placed in heating furnace and preheated, heating-up temperature is 810-
830 DEG C, the heat time is 25-40min；
Heating stepses：The temperature of rise heating furnace is heated again to sprocket wheel, and heating-up temperature is 860-880 DEG C, heat time
For 135-165min；
Quenching Step：Sprocket wheel in the special tooling and frock is placed in quenching oil and quenched, the work in quenching process
Fill and sprocket wheel is motionless and stirs quenching oil, and quenching oil temperature is 70-80 DEG C, the cool time is 25-35min；
Tempering step：Sprocket wheel in the special tooling and frock is placed in tempering oil and is tempered, tempering oil temperature is
170-180 DEG C, tempering time is 4-6h.
2. a kind of heat treatment method of chain wheel of mower according to claim 1, it is characterised in that：Described charging procedure
In, be additionally provided with through-flow groove longitudinally and/or laterally on the installation chassis of special tooling, the mounting seat of each array arrangement it is logical
Discharge orifice is connected with described through-flow groove.
3. a kind of heat treatment method of chain wheel of mower according to claim 1, it is characterised in that：Described charging procedure
In, mainly by stainless steel tube, by each sheet sprocket wheel, string is stacked on special tooling vertically, and each sheet sprocket wheel aligns first
Described stainless steel tube is inserted in, stainless steel tube accessary sprocket wheel endoporus is passed through, then will be cased with described in the stainless steel tube alignment of sprocket wheel
Mounting seat, sprocket wheel string is stacked in mounting seat, finally extracts described stainless steel tube out.
4. a kind of heat treatment method of chain wheel of mower according to claim 1 or 2 or 3, it is characterised in that：Described dress
Expect in step, described locating rod includes two and is separately positioned on the both sides of sprocket wheel, after sprocket wheel string is stacked in mounting seat, also
Two locating rods on top sprocket wheel are arranged with iron wire, by the sprocket wheel be fixed on mounting seat, two locating rods and
In the space that iron wire is surrounded.
5. a kind of heat treatment method of chain wheel of mower according to claim 1 or 2 or 3, it is characterised in that：
In described preheating step, heating-up temperature is 820 DEG C, and the heat time is 30min；
In described heating stepses, heating-up temperature is 870 DEG C, and the heat time is 150min；
In described quenching Step, the mixing speed of quenching oil is 715r/min, and quenching oil temperature is 75 DEG C, and the cool time is
30min；
In described tempering step, tempering oil temperature is 170 DEG C, and tempering time is 4h.
6. a kind of heat treatment method of chain wheel of mower according to claim 1 or 2 or 3, it is characterised in that：Described chain
The material of wheel is 42CrMo or AISI4142.
7. a kind of heat treatment special of chain wheel of mower, it is characterised in that：The special tooling includes installation chassis and battle array
Row are arranged in the mounting seat on installation chassis, and the outer of mounting seat is provided with locating rod, and the centre of mounting seat is provided with through flow hole, described
Sprocket wheel vertically string be stacked in mounting seat, the endoporus of sprocket wheel is corresponding with the position of the through flow hole of mounting seat, the outer teeth groove of sprocket wheel with
The position of the locating rod of mounting seat is corresponding, and locating rod includes two and is separately positioned on the both sides of sprocket wheel.
8. a kind of heat treatment special of chain wheel of mower according to claim 7, it is characterised in that：Described installation
Through-flow groove longitudinally and/or laterally, through flow hole and the described through-flow groove of the mounting seat of each array arrangement are additionally provided with chassis
It is connected.
9. a kind of heat treatment special of chain wheel of mower according to claim 7, it is characterised in that：Also in top
Two locating rods on sprocket wheel are arranged with iron wire, the sky that the sprocket wheel is fixed on mounting seat, two locating rods and iron wire are surrounded
In.
10. a kind of heat treatment special of chain wheel of mower according to claim 7, it is characterised in that：Described battle array
Row are arranged in the mounting seat on installation chassis, and the centre-to-centre spacing between adjacent mounting seat is more than the maximum outside diameter of the sprocket wheel,
To form oil-gap between adjacent sprocket wheel.
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| CN201510249450.9A CN104818377B (en) | 2015-05-15 | 2015-05-15 | The heat treatment method and special tooling of a kind of chain wheel of mower |
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Citations (1)
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| CN204676125U (en) * | 2015-05-15 | 2015-09-30 | 厦门真冈热处理有限公司 | A kind of heat treatment tooling structure of chain wheel of mower |
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| US5752821A (en) * | 1996-07-02 | 1998-05-19 | Kia Motors Corporation | Tray for heat treatment furnace |
| KR100470965B1 (en) * | 2004-03-02 | 2005-02-21 | 권호익 | A work coil for sprocket heating treatment |
| DE112009003755B4 (en) * | 2008-12-17 | 2016-02-04 | Honda Motor Co., Ltd. | Conveying apparatus, method of manufacturing a conveyor, and method of heat treating metal rings using a conveyor |
| CN101838729B (en) * | 2009-03-20 | 2012-06-27 | 王锦堂 | Sprocket tooth part induction heat treatment process |
| CN102220468B (en) * | 2011-06-02 | 2013-05-15 | 重庆市綦江重型汽车配件厂 | Synchronizer sliding sleeve and toothholder co-quenching technology |
| CN102605378A (en) * | 2012-01-13 | 2012-07-25 | 浙江吉利汽车研究院有限公司 | Carburizing and quenching method |
| CN103526006A (en) * | 2013-09-26 | 2014-01-22 | 北京北方车辆集团有限公司 | High-frequency induction heating and heat processing technology of duplicate gear |
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| CN204676125U (en) * | 2015-05-15 | 2015-09-30 | 厦门真冈热处理有限公司 | A kind of heat treatment tooling structure of chain wheel of mower |
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