CN100345654C - Cold-working boring and milling composite technology for automobile front axle - Google Patents
Cold-working boring and milling composite technology for automobile front axle Download PDFInfo
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- CN100345654C CN100345654C CNB2004100133673A CN200410013367A CN100345654C CN 100345654 C CN100345654 C CN 100345654C CN B2004100133673 A CNB2004100133673 A CN B2004100133673A CN 200410013367 A CN200410013367 A CN 200410013367A CN 100345654 C CN100345654 C CN 100345654C
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Abstract
The present invention relates to cold working, boring and milling composite technology for front axles of automobiles, which is mainly characterized in that the production processes of positioning two steel plate spring seats and milling two steel plate spring seat planes are carried out; the production process of drilling two steel plate spring seat planes with ten holes is carried out; U drilling technology is adopted to complete the rough machining production process of a main pin hole; the rough and finish boring machining of the hole diameter of the main pin hole, the chamfering and the finish machining of an upper end surface and a lower end surface are completed on a boring machine. The processing of the whole main pin hole is completed by one-step clamping and positioning operation. In the production process of drilling, milling and hinging a locking pin hole, the locking pin hole is implemented with the technological routes of drilling, milling, drilling and hinging by a three-station machine tool. The present invention adopts the combination of drilling and milling, overcomes shift phenomenon, solves the deviation problem which is not solved by the drilling, enlarging and hinging technology in China for a long time and ensures the central distance dimension tolerance of the main pin hole and the locking pin hole. The present invention has the advantages of simple technological process, high machining precision, good product quality, little technological equipment and tooling investment, high productive efficiency, clean production environment, etc., and the flowing labor strength among the product production processes is low.
Description
Technical field
The invention belongs to field of machining, relate to a kind of processing technology of automobile front axle, what relate to specifically is automobile front axle cold working boring and milling combination process.
Background technology
At present, domestic automobile front axle cold machining process flow process mainly contains following several:
1,1. mills two spring perch planes; 2. bore ten holes (comprising eight U-bolt holes and two center spacing holes on the spring perch plane) on the two spring perch planes; 3. rough mill two kingpin bore upper and lower end faces; 4. finish-milling kingpin bore upper and lower end face; 5. bore and expand the hinge kingpin bore; 6. the kingpin bore of broaching; 7. ream kingpin bore upper and lower end face; 8. lockpin hole drills and reams.
2,1. mill two spring perch planes; 2. bore ten holes on the two spring perch planes; 3. pin-and-hole drills and reams; 4. rough mill two kingpin bore upper and lower end faces; 5. finish-milling kingpin bore upper and lower end face; 6. bore and expand the hinge kingpin bore;
3,1. mill two spring perch planes; 2. bore ten holes on the two spring perch planes; 3. lockpin hole drills and reams; 4. rough mill two kingpin bore upper and lower end faces; 5. bore and expand the hinge kingpin bore; 6. finish-milling kingpin bore upper and lower end face;
There is following deficiency in above-mentioned automobile front axle cold machining process:
In first kind of technology, 1, adopt the kingpin bore location, the ream upper and lower end face, the perpendicularity of end face and kingpin bore is difficult for guaranteeing that the kingpin bore height dimension is difficult for assurance; 2, with kingpin bore spitting drill lockpin hole, during drill bit process cross phase perforation, be prone to the monolateral phenomenon that disappears of cutting, be offset, cause kingpin bore and lockpin hole centre-to-centre spacing to be difficult for guaranteeing.
In second kind of technology, 1, because of this process is to bore kingpin bore after adopting the subdrilling lockpin hole, and kingpin bore aperture and position dimension are critical size, the kingpin bore aperture precision is difficult for guaranteeing; 2, process kingpin bore behind the first finish-milling kingpin bore of the employing upper and lower end face, the perpendicularity of the relative kingpin bore of end face is difficult to guarantee;
In the third technology, 1, kingpin bore and lockpin hole cross be difficult for guaranteeing in perforation dimensional tolerance ± 0.1 mutually; 2, adopt the ream kingpin bore, its dimensional tolerance is difficult for guaranteeing; 3, back finish-milling kingpin bore upper and lower end face, kingpin bore and upper and lower end face perpendicularity are difficult for guaranteeing; 4, the kingpin bore length dimension is difficult for guaranteeing.
Summary of the invention
Automobile front axle is a stock class symmetrical component, and in the front axle the cold-working process, the key issue that solve concentrates in the processing of two kingpin bores and two lockpin holes.The firstth, solve the perpendicularity 0.05 of two kingpin bore upper and lower end faces to the kingpin bore axis; The secondth, solve position dimension tolerance+0.1 that kingpin bore and lockpin hole two crosses pass through mutually and lockpin hole to kingpin bore upper surface dimensional tolerance ± 0.2.
The purpose of this invention is to provide and a kind ofly can effectively solve above-mentioned difficult point, the automobile front axle cold working boring and milling combination process that technical process is simple, machining accuracy is high, production efficiency is high.
Technology thinking of the present invention is: adopt frock clamp to guarantee processing datum-leaf spring plane and kingpin bore upper and lower end face precision; Adopt the method for subdrilling kingpin bore to guarantee the every precision of kingpin bore and kingpin bore and lockpin hole centre-to-centre spacing dimensional accuracy to the assurance of key technical index.
For achieving the goal, the invention provides following processing technology:
1. locate two spring perches, mill two spring perch planes;
2. bore ten holes on two spring perch planes;
3. rough mill the kingpin bore upper and lower end face;
4. bore kingpin bore;
5. thick, right boring kingpin bore, car owner's pin-and-hole end face;
6. bore, mill, cut with scissors lockpin hole;
7. ream lockpin hole end face.
Feature of the present invention also is: operation 1. in, it during two spring perches, adopted positioning fixture in the location, the front axle two ends with conventional anchor clamps location after, the pneumatic means that usefulness is arranged on the front axle both sides carries out assist location.
Said pneumatic means is the pneumatic clamps clencher.
Feature of the present invention also is: for this technology, 5. 4. 3. operation be processing kingpin bore process, and in this process, the processing of whole kingpin bore is located by a clamping and finished.When boring kingpin bore, knife bar adopts the U of SANDVIK to bore.Slightly, during right boring kingpin bore car owner pin-and-hole end face, cutter adopts the indexable insert tip, throw away tip of SANDVIK.
Feature of the present invention also is: for this technology, boring, mill, when cutting with scissors lockpin hole, adopting the three station drilling machines that bore cutter, milling cutter, reamer are installed.
Feature of the present invention also is: for this technology, bore, mill, when cutting with scissors lockpin hole, its technical process is: be that kingpin bore passes through the place mutually with lockpin hole with the bit drills lockpin hole to certain depth earlier, drill bit retreats, cut kingpin bore with milling cutter again and pass through one section mutually with lockpin hole, use the part of bit drills remainder again behind the withdrawing, use reamer fine finishining lockpin hole at last again.
In the present invention, locate two spring perches, mill two spring perch plane operations, adopted locate mode balance forging local defect, seek the accuracy of manufacture of forging and the equalization point that machining requires.Bore ten hole operations on the two spring perch planes, adopt advanced driller's U skill, finish the roughing operation of kingpin bore.On boring machine, finish the fine finishining of thick right boring processing, chamfering and the upper and lower end face in kingpin bore aperture.The processing of whole kingpin bore is finished by a clamping location.And the aperture size, surface roughness, upper and lower end face that have guaranteed kingpin bore are to specification requirements such as the perpendicularity of kingpin bore and aperture chamferings.Brill mills hinge lockhole operation, because of kingpin bore passes through mutually with the lockpin hole space, in machining, bore aperture behind the subdrilling macropore and do not meet technological requirement, but consider concrete each spot size requirement of front axle, kingpin bore is the place that critical size is concentrated, should guarantee kingpin bore aperture, roughness, kingpin bore and upper and lower end face perpendicularity, guarantee kingpin bore and lockpin hole centre distance again, therefore, must guarantee every specification requirement of kingpin bore earlier, be that smart benchmark processing lockpin hole could guarantee product quality fully reliably with kingpin bore again.The shift phenomenon that produces when boring lockpin hole for solving is implemented brill by three station drilling machines to lockpin hole and--is milled--brill--process route of hinge.Adopt to bore and mill combination, overcome shift phenomenon, solved domestic for a long time using and bored the unsolved correction problem of expansion hinge technology, guaranteed kingpin bore and lockpin hole centre-to-centre spacing dimensional tolerance.
The present invention is applicable to the above all kinds of automobile front axle productions of axle load 4.2T level, and it is simple to have technical process, machining accuracy height, good product quality, process equipment and frock small investment, production efficiency height, advantage such as fluent labour intensity is low between product sequence, and production environment is clean and tidy.
Description of drawings
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail:
Fig. 1 is a 1. clamping schematic diagram of operation; Fig. 2 is the A--A cutaway view of Fig. 1; Fig. 3 is a 2. clamping schematic diagram of operation; Fig. 4 is the B-B cutaway view of Fig. 3; Fig. 5, Fig. 6 are 3. clamping schematic diagram of operation; Fig. 7, Fig. 8 are 4. clamping schematic diagram of operation, and Fig. 9, Figure 10 are 5. clamping schematic diagram of operation; Figure 11, Figure 12 are 6. clamping schematic diagram of operation.
The specific embodiment
With EQ153 type automobile front axle cold machining process is example, and the present invention is illustrated:
1. operation mills two spring perch planes, guarantees that plane, two kingpin bore center line places is vertical with the spring perch plane, guarantees flatness.
Equipment choosing: double end vertical milling lathe.Guarantee working (machining) efficiency and two spring perch flatnesses.
Fig. 1, operation shown in Figure 2 be the clamping sketch 1.: with two kingpin bores, 2 outer walls location, it is vertical with two spring perches, 1 plane to guarantee plane, two kingpin bore center line places to block two kingpin bores, 2 outer walls respectively by two movable vee-blocks 3.With two pneumatic pinch, two spring perches, 1 side, simultaneously, below two spring perches 1, add two aiding supports 5 again.
Cutter is bigger because of this operation milling surplus, for about 7-15mm, therefore, adopts hard-alloy heavy type facing cut cutterhead, model: CMA315.Blade model: SPCN1905EDR.
2. operation bores ten holes on the two spring perch planes, guarantees aperture, two spring perch planar central distance, symmetry.
Equipment adopts the general radial drilling machine of Z3025, with diversity that adapts to converted products and the flexibility of changing the line of production.
Fig. 3, operation shown in Figure 4 be the clamping sketch 2.: use screw mandrel screw drive mechanism 6 to guarantee neutrality.Block two kingpin bore outer walls with two centering vee-blocks 7 and locate the side-play amount that guarantees two kingpin bores, 2 center lines and two spring perches, 1 center line, again with plane, 8 times locating pin 9 places of centering adjustable drilling template as clamping datum level, clamp front axles by pneumatic pinch piece 10.For reducing labor intensity, the power that drives the motion of screw mandrel screw adopts gas motor and worm and gear transmission.
Cutter adopts GB drill bit and combined drilling and reaming cutter to guarantee aperture and efficient.
3. operation rough mills two kingpin bore upper and lower end faces, guarantees that the upper and lower end face carpenters square is very little, stays allowance for finish.
Equipment adopts vertical knee-type milling machine
Fig. 5, operation shown in Figure 6 be the clamping sketch 3.: with two steel plate bullet V spring abutments, 1 plane, jig seat 11 and two centre bores, 12 location, clamp front axle by pneumatic pinch V-block 13, kingpin bore 2 positions add auxiliary clamp mechanism---a kingpin bore melon head withstanding tight block 14.
Cutter is bigger because of this operation milling surplus, adopts carbide alloy staged facing cut cutterhead.
Model: JTMA350.Blade model: SPCN1504EDR.
Operation 4. U is bored kingpin bore, stays boring car surplus.
Equipment adopts U rig bed.
Fig. 7, operation shown in Figure 8 be the clamping sketch 4.: with two spring perches, 1 plane, jig seat 11 and two centre bores, 12 location, clamp front axle by pneumatic pinch V-block 13, mobile again sliding table 15 is to kingpin bore 2 outer wall anchor points, use kingpin bore melon head withstanding tight block 14, upper end briquetting 16 location to clamp the kingpin bore upper and lower end face, 17 is kingpin bore outer wall locating piece.This method with the outer wall location can overcome blank defective different in size, improves blank utilization rate and production efficiency.
Cutter adopts laughable full knife bar of Sweden SANDVIK and blade, can increase work efficiency and the converted products quality.
Operation is 5. thick, right boring kingpin bore car owner pin-and-hole end face, guarantees kingpin bore aperture, hole roughness, kingpin bore upper and lower end face perpendicularity.
Equipment adopts boring car building-block machine.
Fig. 9, operation shown in Figure 10 be the clamping sketch 5.: on two spring perches, 1 plane by centre bore and jig seat 11, clamp front axle by pneumatic pinch piece 18, mobile again sliding table 15 (workpiece has been installed clamping well on sliding table) is to kingpin bore 2 outer wall anchor points, use kingpin bore outer wall locating piece 17 location to clamp kingpin bore, 14,16 is kingpin bore melon head withstanding tight block and upper end briquetting.Like this, guarantee that 4. operation reaches operation 5. same location benchmark is arranged, to guarantee crudy.Finish heavy boring kingpin bore-right boring kingpin bore-finish turning kingpin bore both ends of the surface-work step of falling the orifice angle again.
Cutter adopts laughable full knife bar of Sweden SANDVIK and blade, can increase work efficiency and the converted products quality.
Lockpin hole is bored, mills, cut with scissors to operation 6., guarantees the lockpin hole aperture, guarantees kingpin bore and lockpin hole centre-to-centre spacing.
Equipment adopts vertical three station drilling machines
Figure 11, operation shown in Figure 12 be the clamping sketch 6.: with kingpin bore 2 lower surfaces is the location benchmark, uses alignment pin 19, clamp 20 to clamp stub melon head part; Be the good workpiece of aiding support 21 clampings with two spring perches, 1 side again, after clamping workpiece was good, longitudinally slide unit moved to working position and starts working.At kingpin bore 2 positions cutter is adopted positioning and clamping mode up and down.When boring lockpin hole, add jig seat 11 and guide pad 22 down in both sides up and down at kingpin bore melon head, clamping drill bit, milling cutter and reamer are finished brill and--are milled--brills--and cut with scissors four process respectively to adopt three station drilling machines.For overcoming the shift phenomenon that drill bit produces, take on cutter and working depth is that kingpin bore passes through the place mutually with lockpin hole with the bit drills lockpin hole to certain depth earlier, drill bit retreats, mill the pin kingpin bore with milling cutter again and pass through one section mutually with lockpin hole, with the section of bit drills remainder, use the measure of reamer fine finishining lockpin hole at last again behind the withdrawing.Process like this lockpin hole not only aperture size can guarantee that and kingpin bore is also guaranteed to lockpin hole centre-to-centre spacing size.
The cutter drill bit adopts general international drill bit, reamer, milling cutter.
Operation is ream spring perch dorsal pore 7..
Device-General Z3040 drilling machine
Anchor clamps adopt pull-down to clamp with two leaf spring seat surfaces and two centre bores location.
The general countersink of cutter.
Claims (8)
1, a kind of automobile front axle cold working boring and milling combination process is characterized in that comprising following operation:
1. locate two spring perches, mill two spring perch planes;
2. bore ten holes on the two leaf spring planes;
3. rough mill the kingpin bore upper and lower end face;
4. bore kingpin bore;
5. thick, right boring kingpin bore, car owner's pin-and-hole end face;
6. bore, mill, cut with scissors lockpin hole;
7. ream lockpin hole end face.
2, automobile front axle cold working boring and milling combination process according to claim 1, it is characterized in that: operation 1. in, it during two spring perches, adopted positioning fixture in the location, assist location is carried out with the pneumatic means that is arranged on the front axle both sides after locating with conventional anchor clamps in the front axle two ends.
3, automobile front axle cold working boring and milling combination process according to claim 1 is characterized in that: operation 2. in, bore ten holes on the two spring perch planes, adopt centering adjustable drilling template.
4, automobile front axle cold working boring and milling combination process according to claim 1 is characterized in that: operation is 3. 4. 5. for processing kingpin bore process, in this process, locatees by a clamping and to finish processing.
5, according to claim 1 or 4 described automobile front axle cold working boring and milling combination process, it is characterized in that: when boring kingpin bore, knife bar adopts U to bore.
6, according to claim 1 or 4 described automobile front axle cold working boring and milling combination process, it is characterized in that: during thick, right boring kingpin bore car owner pin-and-hole end face, cutter adopts indexable insert tip, throw away tip.
7, automobile front axle cold working boring and milling combination process according to claim 1, it is characterized in that: operation 6. in, its technical process is: be that kingpin bore passes through the place mutually with lockpin hole with the bit drills lockpin hole to certain depth earlier, drill bit retreats, cut kingpin bore with milling cutter again and pass through one section mutually with lockpin hole, use the position of bit drills remainder again behind the withdrawing, use reamer fine finishining lockpin hole at last again.
8, automobile front axle cold working boring and milling combination process according to claim 1 is characterized in that: operation 6. in, bore, mill, when cutting with scissors lockpin hole, adopt the three station drilling machines that bore cutter, milling cutter, reamer are installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100133673A CN100345654C (en) | 2004-06-26 | 2004-06-26 | Cold-working boring and milling composite technology for automobile front axle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100133673A CN100345654C (en) | 2004-06-26 | 2004-06-26 | Cold-working boring and milling composite technology for automobile front axle |
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| Publication Number | Publication Date |
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| CN1593841A CN1593841A (en) | 2005-03-16 |
| CN100345654C true CN100345654C (en) | 2007-10-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100421867C (en) * | 2005-12-12 | 2008-10-01 | 中国重型汽车集团有限公司 | Cargo-carrying truck integral front spring left front support working process |
| CN100427263C (en) * | 2005-12-12 | 2008-10-22 | 中国重型汽车集团有限公司 | Cargo-carrying truck integral front spring right front support working process |
| CN101767265B (en) * | 2009-01-05 | 2012-05-02 | 陆铭 | Method for processing steering cantilever of tractor |
| CN101829890B (en) * | 2010-05-05 | 2011-11-16 | 湖南凯斯机械股份有限公司 | Reaming and boring method capable of solving concentric problem of multi-section shaft holes |
| CN103111814A (en) * | 2013-01-05 | 2013-05-22 | 沈阳黎明航空发动机(集团)有限责任公司 | Numerical control machining method of aero-engine disc-shaft integrated structure part |
| CN104439898A (en) * | 2014-11-24 | 2015-03-25 | 苏州市福迈精密机械有限公司 | T-shaped block processing technique |
| CN104625628A (en) * | 2014-12-23 | 2015-05-20 | 重庆凯顺机械有限公司 | Processing method of clump weight |
| CN107498268B (en) * | 2017-09-26 | 2019-06-18 | 湖北百兰车轴有限责任公司 | A kind of automobile front axle automatic processing technology |
| CN107900783A (en) * | 2018-01-17 | 2018-04-13 | 朱舸 | A kind of six facing cut roughing semi-manufactured goods quality control method of automobile front axle |
| CN111687604A (en) * | 2020-06-19 | 2020-09-22 | 山西中晋工业机械有限公司 | Manufacturing process of front axle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09175103A (en) * | 1995-12-28 | 1997-07-08 | Isuzu Motors Ltd | Automobile front axle |
| JP2004168164A (en) * | 2002-11-19 | 2004-06-17 | Sumitomo Metal Ind Ltd | Processing method of front axle, positioning device and jig device for machining front axle, and manufacturing method of front axle |
-
2004
- 2004-06-26 CN CNB2004100133673A patent/CN100345654C/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09175103A (en) * | 1995-12-28 | 1997-07-08 | Isuzu Motors Ltd | Automobile front axle |
| JP2004168164A (en) * | 2002-11-19 | 2004-06-17 | Sumitomo Metal Ind Ltd | Processing method of front axle, positioning device and jig device for machining front axle, and manufacturing method of front axle |
Non-Patent Citations (5)
| Title |
|---|
| 在自动线上实现不同内倾角前轴的加工 骆家玲，谷杏雨，组合机床与自动化加工技术，第7期 1997 * |
| 客车前轴钻削工装的研制 俞志桃，客车技术与研究，第21卷第4期 1999 * |
| 数控车床上巧用U钻加工小孔 王继兴，机械工人(冷加工)，第3期 2002 * |
| 汽车前轴钢板弹簧座面铣床简介 胡先洵，唐善洲，汽车科技，第1期 1988 * |
| 用可调夹具加工汽车前轴主销孔两端面 姚广鹰，机械工人(冷加工)，第12期 2000 * |
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