CN108405769A - The manufacturing method of forging special-shape ring in open coal mine excavator - Google Patents
The manufacturing method of forging special-shape ring in open coal mine excavator Download PDFInfo
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- CN108405769A CN108405769A CN201810071788.3A CN201810071788A CN108405769A CN 108405769 A CN108405769 A CN 108405769A CN 201810071788 A CN201810071788 A CN 201810071788A CN 108405769 A CN108405769 A CN 108405769A
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- special
- rolling
- ring
- forging
- coal mine
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/22—Making articles shaped as bodies of revolution characterised by use of rolls having circumferentially varying profile ; Die-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses the manufacturing method of forging special-shape ring in open coal mine excavator, processing step is as follows：Heating → forging base → rectangle rolling → preforming → special-shaped rolling → heat treatment before blanking → forging.The manufacturing method of forging special-shape ring goes out the forging special-shape ring in open coal mine excavator using energy Direct Rolling after special press mold and special core roller in above-mentioned open coal mine excavator, without finishing processing, raw material has been saved, production efficiency is substantially increased, has reduced production cost；In addition, being greatly improved using the performance of ring after special press mold is preforming and the rolling of special core roller abnormity, and the performance on ring core and surface can be made almost the same.
Description
Technical field
The present invention relates to special-shaped rings to forge field, and in particular to the manufacturer of forging special-shape ring in open coal mine excavator
Method.
Background technology
Forging special-shape ring is the important component of excavator in open coal mine excavator as shown in Figure 1.It is entire
It is maximum by dead load and shock loading in excacation, the position of frayed most serious.Currently, special-shaped in open coal mine excavator
The manufacturing method of ring forging is：Using base steel as raw material, ring is rolled over through blanking, forging base, the straight-flanked ring that cross section is rectangle is made
Part obtains forging special-shape ring in open coal mine excavator then after finishing processing.The shortcomings that currently manufactured method is：Due to
The size difference of forging special-shape ring is bigger in the size and open coal mine excavator of rectangle ring, so finishing processing can be increased
Difficulty, consumption of raw materials is more, reduces production efficiency, increases production cost.
Invention content
The technical problem to be solved by the present invention is to：It will provide in a kind of open coal mine excavator not needing finishing processing
The manufacturing method of forging special-shape ring.
To solve the above-mentioned problems, the technical solution adopted in the present invention is：Forging special-shape ring in open coal mine excavator
Manufacturing method, processing step is as follows：Heating → forging base → rectangle rolling → preforming → abnormity before blanking → forging
Rolling → heat treatment,
（1）In blanking procedure, the steel material of selection is:34CrNi3Mo；
（2）Forge preforming in, first to obtained by blanking steel billet carry out chamfered edge it is round as a ball, then carry out it is upset twice, wherein
Upset twice is upset than >=1.5；Then through-hole at shaft core is rushed to steel billet, just base is made；
（3）In rectangle rolling process, first base is subjected to rolling ring on Ring Rolling Machine, rolling cross section is the rectangle ring of rectangle；
（4）In preforming operation, use special die along the axis of rectangle ring on the end face of rectangle ring on press
Step carries out preforming in compacting, and to obtain preformed member, special press mold is a frustoconical section, when compacting special pressure
The diameter small end of film is downward；
（5）In special-shaped rolling process, abnormity is carried out to preformed member using special core roller and the cylindrical main film that rolls on Ring Rolling Machine
Rolling, to obtain forging special-shape ring；Special core roller is followed successively by shell portion, upper frustoconical section, lower circle from top to bottom
At an entirety, the diameter of upper shell portion is equal to the diameter of lower shell portion, upper frustoconical section for column body segment coaxial arrangement
End diameter be more than upper shell portion diameter；When abnormity rolling, the main rotating speed for rolling mould is 22~24 revs/min, is biting rank
Section, special feed rate of idle roll be 0.1~0.2mm/s, ring diameter coarsening rate be 1~2mm/s, rolling loads be 8.5~
9.5MPa, driven roller linear velocity are 0.6~0.8mm/s；In steady rolling sequence, special feed rate of idle roll is 0.27~
0.33mm/s, ring diameter coarsening rate are 2~4mm/s, and rolling loads are 6.5~7.5MPa, and driven roller linear velocity is 0.55
The linear velocity of~0.65m/s, upper and lower cone roller are 1.8~2.2mm/s；Terminating rolling sequence and full circle stage, special core roller into
It is 0.08~0.12m/s to speed, ring diameter coarsening rate is 0.18~0.22mm/s, and rolling loads are 2.5~3.5
MPa, driven roller linear velocity are 0.18~0.22m/s, and upper and lower cone roller does not apply pressure.
Further, in open coal mine excavator above-mentioned forging special-shape ring manufacturing method, wherein：Special press mold small end
Edge on be rounded down.
Further, in open coal mine excavator above-mentioned forging special-shape ring manufacturing method, wherein：On in special core roller
It is rounded down on the edge of frustoconical section small end.
Further, in open coal mine excavator above-mentioned forging special-shape ring manufacturing method, wherein：Using 6000T oil
Press is forged, and rolling ring is carried out using 9m Ring Rolling Machines.
Further, in open coal mine excavator above-mentioned forging special-shape ring manufacturing method, wherein：Heater before forging
In sequence, steel billet obtained by blanking is lain against on the cushion block in heating furnace, in-furnace temperature≤550 DEG C when billet-charging, shove charge is completed
2.5~3.5h is kept the temperature afterwards；Then heating furnace is heated so that in-furnace temperature with the rate of≤80 DEG C/h be warming up to 850 DEG C ±
5.5~6.5h is kept the temperature after 10 DEG C, then proceedes to heating so that in-furnace temperature is warming up to 1250 DEG C ± 10 with the rate of≤120 DEG C/h
4.5~5.5h is kept the temperature after DEG C.
Advantages of the present invention is：The manufacturing method of forging special-shape ring is using special in open coal mine excavator of the present invention
With after press mold and special core roller can Direct Rolling go out the forging special-shape ring in open coal mine excavator, without smart car plus
Work has saved raw material, substantially increases production efficiency, reduces production cost；In addition, preforming and special using special press mold
The performance of ring greatly improves after being rolled with core roller abnormity, and the performance on ring core and surface can be made almost the same.
Description of the drawings
Fig. 1 is the structural schematic diagram of forging special-shape ring in open coal mine excavator of the present invention.
Fig. 2 is the structural schematic diagram of rectangle ring of the present invention.
Fig. 3 is the structural schematic diagram of preformed member of the present invention.
Fig. 4 is the structural schematic diagram of special press mold of the present invention.
Fig. 5 is the structural schematic diagram of special core roller of the present invention.
Specific implementation mode
With reference to specific embodiments and the drawings, the present invention is described in further detail.
The manufacturing method of forging special-shape ring, processing step are as follows in open coal mine excavator：It is heated before blanking → forging
→ forging base → rectangle rolling → preforming → special-shaped rolling → heat treatment,
（1）In blanking procedure, the steel material of selection is:34CrNi3Mo；Billet bloom size obtained by blanking be 906 × φ of φ 1060 ×
2005mm；Weight about 13.2T；
（2）Before forging in heating process, steel billet obtained by blanking is lain against on the cushion block in heating furnace, temperature in stove when billet-charging
≤ 550 DEG C of degree keeps the temperature 2.5~3.5h after the completion of shove charge；Then heating furnace is heated so that in-furnace temperature is with≤80 DEG C/h's
Rate keeps the temperature 5.5~6.5h after being warming up to 850 DEG C ± 10 DEG C, then proceedes to heating so that in-furnace temperature is with the speed of≤120 DEG C/h
Rate keeps the temperature 4.5~5.5h after being warming up to 1250 DEG C ± 10 DEG C；
（3）It forges in preforming, initial forging temperature≤1150 DEG C of steel billet, final forging temperature >=850 DEG C of steel billet, steel billet is forging
In the process if temperature is less than final forging temperature, steel billet need to melt down heating and thermal insulation；First to obtained by blanking on 6000T hydraulic presses
Steel billet carry out chamfered edge it is round as a ball, then carry out it is upset twice, for the first time it is upset to φ 1450 × 1000, forging ratio 2, second of pier
Slightly to φ 1860 × 600, forging ratio 1.67 then rushes steel billet 440 through-holes of φ at shaft core, and outer diameter φ 1930 × height is made
The first base of 600mm；
（4）In rectangle rolling process, initial forging temperature≤1150 DEG C of first base, final forging temperature >=850 DEG C of first base, first base forging
In the process if temperature is less than final forging temperature, first base need to melt down heating and thermal insulation；First base is subjected to rolling ring on 9m Ring Rolling Machines, is rolled
Cross section as shown in Figure 2 is the rectangle ring of rectangle, and the size of rectangle ring is：A=φ 2000, b=600, c=φ 700 are single
Position is mm；
（5）In preforming operation, initial forging temperature≤1150 DEG C of rectangle ring, final forging temperature >=850 DEG C of rectangle ring, rectangle
For ring if temperature is less than final forging temperature in forging process, rectangle ring need to melt down heating and thermal insulation；Make on 6000T hydraulic presses
Step carries out preforming in being suppressed on the end face of rectangle ring along the axis of rectangle ring with special die, to obtain as
The size of preformed member shown in Fig. 3, preformed member is：A=φ 2300, b=450, c=φ 700, d=φ 1050, e=170, unit
It for mm, as shown in figure 4, special press mold is a frustoconical section, is rounded down on the edge of special press mold small end, when compacting
The diameter small end of special press mold is downward；
（6）In special-shaped rolling process, initial forging temperature≤1150 DEG C of preformed member, final forging temperature >=850 DEG C of preformed member, in advance
For molded part if temperature is less than final forging temperature in forging process, preformed member need to melt down heating and thermal insulation；It is adopted on 9m Ring Rolling Machines
Special-shaped rolling is carried out to preformed member with special core roller and the cylindrical main film that rolls, to obtain forging special-shape ring as shown in Figure 1,
The size of forging special-shape ring is：A=φ 4960 ± 10, b=335 ± 10, c=φ 4185 ± 10, d=φ 4535 ± 10, e=165 ±
10, unit mm；As shown in figure 5, special core roller is followed successively by shell portion, upper frustoconical section, lower cylinder from top to bottom
The coaxial arrangement of body section is at an entirety, and the diameter of upper shell portion is equal to the diameter of lower shell portion, upper frustoconical section
End diameter is more than the diameter of upper shell portion, goes up in special core roller and is rounded down on the edge of frustoconical section small end；It is different
When shape rolls, the main rotating speed for rolling mould is 22~24 revs/min, and in bite stage, special feed rate of idle roll is 0.1~0.2mm/s,
Ring diameter coarsening rate is 1~2mm/s, and rolling loads are 8.5~9.5MPa, and driven roller linear velocity is 0.6~0.8mm/s；
In steady rolling sequence, special feed rate of idle roll is 0.27~0.33mm/s, and ring diameter coarsening rate is 2~4mm/s, is rolled
Load processed is 6.5~7.5MPa, and driven roller linear velocity is 0.55~0.65m/s, the linear velocity of upper and lower cone roller is 1.8~
2.2mm/s；Terminating rolling sequence and full circle stage, special feed rate of idle roll is 0.08~0.12m/s, and ring diameter is grown up
Speed is 0.18~0.22mm/s, and rolling loads are 2.5~3.5 MPa, and driven roller linear velocity is 0.18~0.22m/s, above and below
Cone roller does not apply pressure.
Forging special-shape ring in obtained open coal mine excavator is heat-treated in heat-treatment furnace.
Claims (5)
1. the manufacturing method of forging special-shape ring, processing step are as follows in open coal mine excavator：Heated before blanking → forging →
Forge base → rectangle rolling → preforming → special-shaped rolling → heat treatment, it is characterised in that：
（1）In blanking procedure, the steel material of selection is:34CrNi3Mo；
（2）Forge preforming in, first to obtained by blanking steel billet carry out chamfered edge it is round as a ball, then carry out it is upset twice, wherein
Upset twice is upset than >=1.5；Then through-hole at shaft core is rushed to steel billet, just base is made；
（3）In rectangle rolling process, first base is subjected to rolling ring on Ring Rolling Machine, rolling cross section is the rectangle ring of rectangle；
（4）In preforming operation, use special die along the axis of rectangle ring on the end face of rectangle ring on press
Step carries out preforming in compacting, and to obtain preformed member, special press mold is a frustoconical section, when compacting special pressure
The diameter small end of film is downward；
（5）In special-shaped rolling process, abnormity is carried out to preformed member using special core roller and the cylindrical main film that rolls on Ring Rolling Machine
Rolling, to obtain forging special-shape ring；Special core roller is followed successively by shell portion, upper frustoconical section, lower circle from top to bottom
At an entirety, the diameter of upper shell portion is equal to the diameter of lower shell portion, upper frustoconical section for column body segment coaxial arrangement
End diameter be more than upper shell portion diameter；When abnormity rolling, the main rotating speed for rolling mould is 22~24 revs/min, is biting rank
Section, special feed rate of idle roll be 0.1~0.2mm/s, ring diameter coarsening rate be 1~2mm/s, rolling loads be 8.5~
9.5MPa, driven roller linear velocity are 0.6~0.8mm/s；In steady rolling sequence, special feed rate of idle roll is 0.27~
0.33mm/s, ring diameter coarsening rate are 2~4mm/s, and rolling loads are 6.5~7.5MPa, and driven roller linear velocity is 0.55
The linear velocity of~0.65m/s, upper and lower cone roller are 1.8~2.2mm/s；Terminating rolling sequence and full circle stage, special core roller into
It is 0.08~0.12m/s to speed, ring diameter coarsening rate is 0.18~0.22mm/s, and rolling loads are 2.5~3.5
MPa, driven roller linear velocity are 0.18~0.22m/s, and upper and lower cone roller does not apply pressure.
2. the manufacturing method of forging special-shape ring in open coal mine excavator according to claim 1, it is characterised in that：It is special
It is rounded down on the edge of press mold small end.
3. the manufacturing method of forging special-shape ring in open coal mine excavator according to claim 1 or 2, it is characterised in that：
It is rounded down on the edge of upper frustoconical section small end in special core roller.
4. the manufacturing method of forging special-shape ring in open coal mine excavator according to claim 1 or 2, it is characterised in that：
It is forged using 6000T hydraulic presses, rolling ring is carried out using 9m Ring Rolling Machines.
5. the manufacturing method of forging special-shape ring in open coal mine excavator according to claim 1 or 2, it is characterised in that：
Before forging in heating process, steel billet obtained by blanking is lain against on the cushion block in heating furnace, in-furnace temperature≤550 when billet-charging
DEG C, 2.5~3.5h is kept the temperature after the completion of shove charge；Then heating furnace is heated so that in-furnace temperature is with the rate liter of≤80 DEG C/h
Temperature then proceedes to heating so that in-furnace temperature is heated up with the rate of≤120 DEG C/h to 5.5~6.5h of heat preservation after 850 DEG C ± 10 DEG C
4.5~5.5h is kept the temperature after to 1250 DEG C ± 10 DEG C.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109351896A (en) * | 2018-11-14 | 2019-02-19 | 湖北汽车工业学院 | A kind of milling method of 6061 aluminium alloy ring with odd-shaped cross section of super-large diameter |
| CN114289677A (en) * | 2021-12-15 | 2022-04-08 | 陕西宏远航空锻造有限责任公司 | Rolling forming method for titanium alloy non-uniform-thickness special-shaped thin-wall ring piece |
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| DE69915046T2 (en) * | 1999-07-13 | 2004-07-15 | Kabushiki-Kaisha Kotani | Hypoid gear for differential and method for its manufacture |
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| CN102489638A (en) * | 2011-12-27 | 2012-06-13 | 张家港海陆环形锻件有限公司 | Radial and axial roll-forming method for large internal-stage annular piece |
| CN105779754A (en) * | 2014-12-15 | 2016-07-20 | 重庆迅升机车配件有限公司 | Forging heating technology |
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2018
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| JPS54155975A (en) * | 1978-05-30 | 1979-12-08 | Sumitomo Metal Ind Ltd | Rolling method for ring type product |
| DE69915046T2 (en) * | 1999-07-13 | 2004-07-15 | Kabushiki-Kaisha Kotani | Hypoid gear for differential and method for its manufacture |
| CN101053887A (en) * | 2007-05-21 | 2007-10-17 | 武汉理工大学 | Inner step profile section ring parts rolling forming method |
| CN201324740Y (en) * | 2008-12-22 | 2009-10-14 | 江阴振宏重型锻造有限公司 | Novel profile ring forging tool for middle die sleeve in automobile tire die |
| CN202123360U (en) * | 2011-04-26 | 2012-01-25 | 张家港海陆环形锻件有限公司 | Annular piece tooling for rim of construction machinery wheel |
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| CN102489638A (en) * | 2011-12-27 | 2012-06-13 | 张家港海陆环形锻件有限公司 | Radial and axial roll-forming method for large internal-stage annular piece |
| CN105779754A (en) * | 2014-12-15 | 2016-07-20 | 重庆迅升机车配件有限公司 | Forging heating technology |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109351896A (en) * | 2018-11-14 | 2019-02-19 | 湖北汽车工业学院 | A kind of milling method of 6061 aluminium alloy ring with odd-shaped cross section of super-large diameter |
| CN114289677A (en) * | 2021-12-15 | 2022-04-08 | 陕西宏远航空锻造有限责任公司 | Rolling forming method for titanium alloy non-uniform-thickness special-shaped thin-wall ring piece |
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| CN108405769B (en) | 2019-09-03 |
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