CN102896169A - Method for forming bearing tapered roller blanks through cold extrusion and corresponding die for method - Google Patents
Method for forming bearing tapered roller blanks through cold extrusion and corresponding die for method Download PDFInfo
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- CN102896169A CN102896169A CN2012103925274A CN201210392527A CN102896169A CN 102896169 A CN102896169 A CN 102896169A CN 2012103925274 A CN2012103925274 A CN 2012103925274A CN 201210392527 A CN201210392527 A CN 201210392527A CN 102896169 A CN102896169 A CN 102896169A
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Abstract
The invention discloses a method for forming bearing tapered roller blanks through cold extrusion and a corresponding shearing die and a cold extrusion forming die for the method. The method comprises the following steps of: I, putting bar stock in the shearing die, and shearing the bar stock into required cylindrical stock parts; II, polishing, washing and drying the surfaces of the stock parts; and III, putting the stock parts in the cold extrusion forming die, and performing punch forming to obtain the blanks. According to the method for forming tapered rollers through the cold extrusion, the current situation that only tapered rollers of which the diameters are within 24mm can be formed through the cold extrusion for so long in China is changed, so that tapered rollers of which the diameters are greater than 24mm can also be formed through the cold extrusion. Moreover, compared with a traditional method for forming the tapered rollers of which the diameters are within 24mm through the cold extrusion, the precision and the shape are greatly improved when the tapered rollers which are equal in diameter are processed by the method disclose by the invention.
Description
Technical field
The present invention relates to a kind of preparation method and corresponding shearing die and cold extrusion die of bearing conical roller.
Background technology
Roller production is subjected to the constraint of traditional mode in each side such as roller designs, Fixture Design, technics institution and detection rules, equipment, frock, raw material, managerial skills, process quality control ability are subjected to the restriction of traditional habit, cause that the roller production process route is long, allowance is large, manufacturing procedure is many, loading and unloading often.Frock tool does not improve for many years, and production technology falls behind, waste of raw materials, and production cost is high, and process rationality is relatively poor.
Z31-25, Z31-13 cold headers are adopted in the blank moulding of cylindrical roller, taper roller and aligning roller that diameter of phi 24mm is following basically.Blanking is the open type blank that adopts biscuit or vertical bar material, and the blank distortion is large, and one-time formed form and position tolerance and size scattered error are large, and the compound material utilization rate is low.The processing method of the above taper roller of diameter of phi 24mm has two kinds, and a kind of is to adopt Vehicle Processing, and a kind of is drop stamping.The roller density of Vehicle Processing low (density metal is lax), metallic fiber is cut off, and the imported bearing roller also is to adopt Vehicle Processing.And the raw material that expend are many, and working (machining) efficiency is not high, and productivity ratio is low.The roller metallographic structure of drop stamping easily destroys (burning or overheated) and causes part to scrap, and the control of operation requires very high, is difficult to control.
Now advanced processing method is to adopt cold extrusion shapedly, and cold extrusion shaped have a plurality of advantages, and its bearing conical roller that processes reaches optimum density (generation endless belt), and metallographic structure can not be damaged yet, and is durable in use.
Summary of the invention
The technical problem to be solved in the present invention is: be out of shape the of poor quality of large and major diameter roller employing Vehicle Processing moulding existence for blanking in the present taper roller blank forming technical process, the problems such as waste wood consuming time, provide a kind of diameter greater than the cold extrusion shaped method of the roller of 24mm, and corresponding shearing die and cold extrusion molding mould.
Technical scheme of the present invention:
The cold extrusion shaped method of a kind of bearing conical roller blank may further comprise the steps:
Step 1 is put into shearing die with bar, shears bar and becomes cylindrical materials and parts, or use sawing machine with the required cylindrical materials and parts of the sawed-off one-tenth of bar;
Step 2, is cleaned oven dry with the materials and parts surface finish;
In step 3, the diameter at butt end of blank is greater than 24mm after the punch forming.
In step 2, before polishing, use lathe to go out 2 ° orientation angle at an end Excircle machining of materials and parts.
A kind of shearing die of implementation step one, comprise the columnar ledger-plate that is installed on the tool fixing frame and be installed on the movable knife rack cutting blade with the semicircle edge of a knife, it is characterized in that: the little 0.1 ~ 0.5mm of interior radius of circle of the radius ratio ledger-plate of the semicircle edge of a knife of cutting blade, the home position of the semi-circular portion of the edge of a knife is than the high 1 ~ 3mm of lower limb of cutting blade, and edge of a knife intersection terminal and the cutting blade lower limb is beaten fillet.
The feed end of ledger-plate is equipped with the fairlead with bellmouth.
Tool fixing frame is installed in the left end of lower shoe, and the right-hand member of lower shoe is installed positioning baffle, is equipped with on the positioning baffle to adjust screw and adjusting nut.
A kind of cold extrusion die of implementation step three, comprise forming punching head and the lower bolster that install cope match-plate pattern, cope match-plate pattern below, the guide pin bushing that install the cope match-plate pattern below is enclosed within on the guide pillar of installing the lower bolster top, the groove of an annular is arranged on the lower surface of forming punching head, and the nahlock height of annular groove center projections is lower than the lower surface of forming punching head; Central authorities at the lower bolster upside are provided with die case, the die cavity housing is installed in the middle of the die case, alloy die cavity and profiled member are installed in the die cavity housing, the upper semisection central authorities of alloy die cavity are 2 ° of bellmouths, lower semisection central authorities are cylindrical holes, the bellmouth root has round-corner transition to the cylindrical hole top, and profiled member is installed in the cylindrical hole.
The profiled member below is bearing block, and the bearing block below is ejection piece.
Beneficial effect of the present invention:
1. the method for cold extrusion shaped taper roller of the present invention, changed for a long time domestic can only cold extrusion shaped diameter 24mm with the present situation of interior taper roller, so that the taper roller of diameter more than 24mm also can be by cold extrusion shaped, and comparing present diameter 24mm with the cold-extrusion molding method of interior taper roller, the present invention precision and shape when the taper roller of processing same diameter all are improved largely.
2. in order to guarantee that the deflection behind the Cutting stick meets the demands, designed the shearing die with special edge of a knife shape, the edge of a knife is down " U " shape, and the horizontal spacing of the edge of a knife is the diameter less than bar, cutting blade is to the down cut bar time like this, and the both sides of at first shearing bar are wrapped in the shape of the edge of a knife behind the materials and parts that will the shear process straight flange of 1mm, then the shear surface of cutting blade is from the two side direction tops expansion of bar, until cut off.The materials and parts circularity of shearing so just keeps relatively goodly, even bar is very thick, deflection is also very little.
3. because materials and parts are cylindrical, and the cold extrusion die die cavity has tapering, tilt after cylindrical materials and parts are put into die cavity, when drift moved downward, punch forming behind the contact materials and parts moment centering was pressed into the right angle cold-extruded of cylindrical materials and parts the fillet of required form like this, frictionally damage to mold cavity is very large, the mold use life-span is not long, and endless belt is monolateral very large after the moulding, string endless belt trouble.Therefore in the processing method of the present invention, before putting into mould molding, an end Excircle machining of materials and parts is gone out 2 ° orientation angle, do not have like this problems referred to above, very little to the mold cavity damage.
4. cold extrusion die of the present invention is reasonable in design, and materials and parts are one time punching molded by cold extrusion die, and the quality after the moulding is good, and the endless belt of generation is evenly tiny.Can satisfy the demand of form and position tolerance.The metal compaction degree is high, and the fiber of part texture is not cut off, long service life.
5. by the displacement of orientation angle restriction materials and parts in mold cavity, in the punching course, materials and parts can move straight down along the die cavity inwall, can not be offset and eject.
6. save material, cold extrusion directly forms blank, compares the Vehicle Processing moulding, saves about 25% material.
7. efficient is high, and the needed time of whole process is short, and each machine-team can be produced 4000.
8. high conformity, the material weight deviation of each blanking is in 2g, and one time punching molded by mould, the unidimensional deviation of each part is very little.
9. cold extruding technique of the present invention is a technological revolution for the taper roller blank forming more than the diameter 24mm, and very large progradation has been played in the development of taper roll bearing production.
Description of drawings:
Fig. 1 is shearing die structural representation of the present invention.
Fig. 2 is that the A of Fig. 1 is to view.
Fig. 3 is the A-A view of Fig. 1.
Fig. 4 is cold extrusion die structural representation of the present invention.
The specific embodiment:
Embodiment 1: take the bearing conical roller of model as 30318 as example, blank upper end diameter at butt end is 27.55mm, and length 32mm, lower end top diameter are 25.32mm.Be originally and adopt the bar of diameter 28mm to form through Vehicle Processing, every bar that needs to use 35mm length, materials 169g.
The structure of shearing die: columnar ledger-plate 20 is installed on the tool fixing frame 16, cutting blade 4 with the semicircle edge of a knife is installed on the movable knife rack, the little 0.1mm of interior radius of circle of the radius ratio ledger-plate 20 of the semicircle edge of a knife of cutting blade 4, the home position of edge of a knife semi-circular portion is than the high 1.5mm of lower limb of cutting blade 4, and edge of a knife intersection terminal and cutting blade 4 lower limbs is beaten the fillet that radius R is 0.5mm.The feed end of ledger-plate 20 is equipped with the fairlead 14 with bellmouth, be connected by screw again together behind both via pins location, after locating by pin, tool fixing frame 16 is installed in again the left end of lower shoe 8 by screw, the right-hand member of lower shoe 8 is installed positioning baffle 5 by pin and screw, is equipped with on the positioning baffle 5 to adjust screw 7 and adjusting nut 6.Movable knife rack is comprised of blade installing plate 3 and upper padding plate 2, is installed in upper plate 1 below by screw and pin.By the blanking of this shearing die, can control the deviation of weight of materials and parts in 2g.
The cold extruding die lamps structure: cope match-plate pattern 21 belows are installed upper die plate 37, drift cover 35 and forming punching head 34 successively, the guide pin bushing 33 that install the below, four corners of cope match-plate pattern 21 is enclosed within on the guide pillar 32 of installing on 26 4 angles of lower bolster, the groove of an annular is arranged on the lower surface of forming punching head 34, and the nahlock height of annular groove center projections is lower than the lower surface of forming punching head 34; At lower bolster 26 the counterdie backing plate is installed, the central authorities of counterdie backing plate upside are provided with die case 25, die cavity housing 24 is installed in the middle of the die case 25, alloy die cavity 22 and profiled member 23 are installed in the die cavity housing 24, the upper semisection central authorities of alloy die cavity 22 are 2 ° of bellmouths, lower semisection central authorities are cylindrical holes, the bellmouth root have radius be the round-corner transition of 2.5mm to the cylindrical hole top, profiled member 23 is installed in the cylindrical hole.Profiled member 23 belows are bearing blocks 30, and bearing block 30 belows are ejection pieces 28, and ejection piece 28 lower ends pass lower bolster 26.Wherein alloy die cavity 22 is to adopt the YG20C carbide alloy to make, and hardness is high, and is shock-resistant, durable in use.
Adopt now processing method of the present invention:
Step 1 is put into mould with bar, and the shearing diameter is that the bar of 25mm becomes cylindrical materials and parts, and the heavy 134g(of each materials and parts also can not use the shearing die blanking, adopts sawing machine with the sawed-off blanking of bar);
Step 2 goes out 2 ° orientation angle at an end Excircle machining of cylindrical materials and parts, i.e. orientational cone-shaped surface, and the height of orientational cone-shaped surface is 1.25mm;
Adopt method of the present invention to make taper roller, each class produced about 4000 in 8 hours.Compare Vehicle Processing material-saving 35g for every, but 3500 tons of 100,000,000 economical with materials of every production.
The research and development success of bearing conical roller blank extrusion forming technology, so that the crudy of taper roller blank is better, output is higher, and saves material.
Claims (8)
1. method that the bearing conical roller blank is cold extrusion shaped is characterized in that: may further comprise the steps:
Step 1 is put into shearing die with bar, shears bar and becomes required cylindrical materials and parts, or use sawing machine with the required cylindrical materials and parts of the sawed-off one-tenth of bar;
Step 2, is cleaned oven dry with the materials and parts surface finish;
Step 3 is put into cold extrusion die with materials and parts, the punch forming blank.
2. the cold extrusion shaped method of bearing conical roller blank according to claim 1, it is characterized in that: in step 3, the blank diameter at butt end after the punch forming is greater than 24mm.
3. the preparation method of bearing conical roller according to claim 1 is characterized in that: in step 2, used lathe to go out 2 ° orientation angle at an end Excircle machining of materials and parts before polishing.
4. the shearing die of an implementation step one in claim 1,2 or 3, comprise the columnar ledger-plate (20) that is installed on the tool fixing frame (16) and be installed on the movable knife rack cutting blade (4) with the semicircle edge of a knife, it is characterized in that: the little 0.1 ~ 0.5mm of interior radius of circle of the radius ratio ledger-plate (20) of the semicircle edge of a knife of cutting blade (4), the home position of the semi-circular portion of the edge of a knife is than the high 1 ~ 3mm of lower limb of cutting blade (4), and edge of a knife intersection terminal and cutting blade (4) lower limb is beaten fillet.
5. shearing die according to claim 4, it is characterized in that: the feed end of ledger-plate (20) is equipped with the fairlead (14) with bellmouth.
6. shearing die according to claim 4, it is characterized in that: a side of tool fixing frame (16) is equipped with positioning baffle (5), both mutual spacings are the length of required materials and parts, are equipped with on the positioning baffle (5) to adjust screw (7) and adjusting nut (6).
7. the cold extrusion die of an implementation step three in claim 1,2 or 3, comprise forming punching head (34) and the lower bolster (26) that install cope match-plate pattern (21), cope match-plate pattern (21) below, the guide pin bushing (33) that install cope match-plate pattern (21) below is enclosed within on the guide pillar (32) of installing lower bolster (26) top, it is characterized in that: the groove of an annular is arranged on the lower surface of forming punching head (34), and the nahlock height of annular groove center projections is lower than the lower surface of forming punching head (34); Central authorities at the lower bolster upside are provided with die case (25), die cavity housing (24) is installed in the middle of the die case (25), alloy die cavity (22) and profiled member (23) are installed in the die cavity housing (24), the upper semisection central authorities of alloy die cavity (22) are 2 ° bellmouths, lower semisection central authorities are cylindrical holes, the bellmouth root has round-corner transition to the cylindrical hole top, and profiled member (23) is installed in the cylindrical hole.
8. cold extrusion die according to claim 7 is characterized in that: profiled member (23) below is bearing block (30), and bearing block (30) below is ejection piece (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103925274A CN102896169A (en) | 2012-05-31 | 2012-10-17 | Method for forming bearing tapered roller blanks through cold extrusion and corresponding die for method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210175837.0 | 2012-05-31 | ||
| CN2012101758370A CN102699080A (en) | 2012-05-31 | 2012-05-31 | Method for machining bearing tapered roller blank by cold extrusion forming method |
| CN2012103925274A CN102896169A (en) | 2012-05-31 | 2012-10-17 | Method for forming bearing tapered roller blanks through cold extrusion and corresponding die for method |
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| CN102896169A true CN102896169A (en) | 2013-01-30 |
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| CN2012101758370A Pending CN102699080A (en) | 2012-05-31 | 2012-05-31 | Method for machining bearing tapered roller blank by cold extrusion forming method |
| CN2012103925274A Pending CN102896169A (en) | 2012-05-31 | 2012-10-17 | Method for forming bearing tapered roller blanks through cold extrusion and corresponding die for method |
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| CN2012101758370A Pending CN102699080A (en) | 2012-05-31 | 2012-05-31 | Method for machining bearing tapered roller blank by cold extrusion forming method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104815861A (en) * | 2015-05-04 | 2015-08-05 | 周方义 | Method for forming precise blank of tapered bearing roller, die corresponding to same and manufacturing process of die |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105798712B (en) * | 2016-05-24 | 2018-02-16 | 洛阳宜华滚动体有限公司 | A kind of buffing Processes and apparatus for processing taper roller |
| CN112548011B (en) * | 2020-11-13 | 2022-06-21 | 太仓久信精密模具股份有限公司 | Forming process for preparing high-speed upsetting-formed cone roller type part |
| CN112536577B (en) * | 2020-12-07 | 2021-11-05 | 如皋市力星滚子科技有限公司 | Hollow roller and forming process thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59113937A (en) * | 1982-12-17 | 1984-06-30 | Matsushita Electric Ind Co Ltd | Die for blanking |
| JPH08163728A (en) * | 1994-12-05 | 1996-06-21 | Toshin Denki Kk | Electric wire cutting tool |
| CN1785564A (en) * | 2005-12-16 | 2006-06-14 | 上海工程技术大学 | Round rod feeding device on steel bar cutter |
| CN101020199A (en) * | 2007-03-15 | 2007-08-22 | 王建昌 | Forming process of large conic roller blank |
| CN101301676A (en) * | 2008-06-17 | 2008-11-12 | 浙江天马轴承股份有限公司 | Large size roller cold-upsetting and press-forming method, and cold-upsetting and press-forming mold |
| CN101559462A (en) * | 2009-03-31 | 2009-10-21 | 建研科技股份有限公司 | Steel bar cutting equipment and cutting method |
| CN201895136U (en) * | 2010-11-24 | 2011-07-13 | 台州职业技术学院 | Shear control device of end surface gradient of bar |
-
2012
- 2012-05-31 CN CN2012101758370A patent/CN102699080A/en active Pending
- 2012-10-17 CN CN2012103925274A patent/CN102896169A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59113937A (en) * | 1982-12-17 | 1984-06-30 | Matsushita Electric Ind Co Ltd | Die for blanking |
| JPH08163728A (en) * | 1994-12-05 | 1996-06-21 | Toshin Denki Kk | Electric wire cutting tool |
| CN1785564A (en) * | 2005-12-16 | 2006-06-14 | 上海工程技术大学 | Round rod feeding device on steel bar cutter |
| CN101020199A (en) * | 2007-03-15 | 2007-08-22 | 王建昌 | Forming process of large conic roller blank |
| CN101301676A (en) * | 2008-06-17 | 2008-11-12 | 浙江天马轴承股份有限公司 | Large size roller cold-upsetting and press-forming method, and cold-upsetting and press-forming mold |
| CN101559462A (en) * | 2009-03-31 | 2009-10-21 | 建研科技股份有限公司 | Steel bar cutting equipment and cutting method |
| CN201895136U (en) * | 2010-11-24 | 2011-07-13 | 台州职业技术学院 | Shear control device of end surface gradient of bar |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104815861A (en) * | 2015-05-04 | 2015-08-05 | 周方义 | Method for forming precise blank of tapered bearing roller, die corresponding to same and manufacturing process of die |
| CN104815861B (en) * | 2015-05-04 | 2018-02-13 | 周方义 | The method and mold production process of bearing conical roller precision blank forming |
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| Publication number | Publication date |
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| CN102699080A (en) | 2012-10-03 |
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Application publication date: 20130130 |