CN101342654A - High-accuracy thin and long circular axis processing method - Google Patents

High-accuracy thin and long circular axis processing method Download PDF

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Publication number
CN101342654A
CN101342654A CNA2008100688891A CN200810068889A CN101342654A CN 101342654 A CN101342654 A CN 101342654A CN A2008100688891 A CNA2008100688891 A CN A2008100688891A CN 200810068889 A CN200810068889 A CN 200810068889A CN 101342654 A CN101342654 A CN 101342654A
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CN
China
Prior art keywords
positioning
processing
alignment
thin
cylindrical
Prior art date
Application number
CNA2008100688891A
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Chinese (zh)
Inventor
叶勇
陈祖芳
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中国航空工业标准件制造有限责任公司
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Priority to CNA2008100688891A priority Critical patent/CN101342654A/en
Publication of CN101342654A publication Critical patent/CN101342654A/en

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Abstract

The invention discloses a processing method of a high precision slender circular shaft. The processing method comprises the following steps. Cold drawing material is used as raw material. The outside diameter of the cold drawing material is close to the outside diameter of finished product excircle. The raw material is straightened. The excircle is processed: the rest of geometrical characteristics are processed taking the excircle which has been processed well and has high precision as a standard. General heat treatment is carried out on the surfaces of the processed goods. The external chamfering edges on the excircles at the two ends of slender shaft parts (5) are combined with the endocone of a positioning taper sleeve (2) on a straightening machine (8), forming a positioning clamp. The installation pedestal (1) of the positioning tapper sleeve, a bolt (3) and a washer (4) on the straightening machine form a positioning component. When straightening, the slender shaft parts (5) are arranged on an auxiliary support (6) which is used to prevent the positioning parts from being damaged because of overpressure. The positioning parts moves left and right to install and dismantle parts, and drives the parts to rotate through a plurality of sensors (7) to inspect straightness. The other working procedures are carried out in conventional treatment. The processing method has the characteristics of high material utilization rate, short production period, high production efficiency and low production cost.

Description

The processing method of high-accuracy thin and long circular axis

Technical field

The invention belongs to the Machining Technology field, specifically relate to thin and long circular axis class machining parts.

Background technology

A lot of about thin and long circular axis class machining parts at present.Various processing methods all will relate to the processing of circular shaft class part cylindrical feature.As: size on lathe; Circular shaft outside the grinding on cylindrical grinder; Grinding cylindrical or the like on centerless grinder.But specifically adopt which kind of processing method, how to determine that process program is looked concrete product performance different with required precision similar.

As produce the high-accuracy thin and long circular axis class tooth bar of following parameter, the cylindrical final size is φ 21f6 * 557 (dimensional accuracy IT6), surface roughness 0.8 μ m, linearity 0.08mm, tooth bar precision 7D HGB/T10096-1988.According to " Common Difference ﹠ Cooperation application manual " (China Machine Press's publication) and " metal machining technology person handbook (publication of Shanghai science tech publishing house).General adopt following process program: blanking (φ 25 * 603)-modified-mill both ends of the surface-manual alignment-beat two ends centre bore-top turning-tune turning-alignment (automatically)-centreless grinding grinding cylindrical (dividing three continuous grindings)-processing two head threads roll footpath-mill teeth and push up plane-deburring-mill the other side-deburring-processing flute profile-deburring-heat treatment (high-frequency quenching)-alignment (automatically)-artificial aging-polished OD-polishing flank of tooth-roll two head threads-flaw detection-cleaning-end to examine.This processing scheme mainly exists above problem and shortcoming: 1, stock utilization is low: because part belongs to slender axles, after modifier treatment, flexural deformation is bigger, the economic accuracy that manual alignment reaches is not high, for guaranteeing the turning surplus, adopt φ 25 heat to prick bar, stock utilization only reaches 70.3%; 2, the roughing stage is longer: twice alignment process, twice turning are just arranged before the grinding cylindrical and beat the two ends centre bore, make that roughing stage holding time in whole process is more relatively; 3, production efficiency is low: because the roughing stage is long and manual alignment is of low quality, cylindrical quality behind the car of top (linearity, surface roughness etc.) is difficult to reach certain requirement on the one hand.Therefore, cylindricalo grinding surplus maximum reaches 0.7mm, divides thick, thin, smart three grindings.Thereby the manufacturing cost of thin and long circular axis class tooth bar is higher, productivity ratio is low, is difficult to adapt to large batch of production requirement; 4, to require be an important technology requirement of such part to the axis verticality of high-accuracy thin and long circular axis class tooth bar, directly be to be the alignment benchmark with slender axles two ends centre bore, so centre bore just becomes the main location benchmark that slender axles circular shaft class needs part.Centre bore processing, the formed cost of maintenance are to constitute partly in the thin and long circular axis class part processing cost.

Summary of the invention

A kind of stock utilization height that the objective of the invention is to overcome above-mentioned shortcoming and provide, with short production cycle, production efficiency is high and the processing method of the high-accuracy thin and long circular axis of low cost of manufacture.

The present invention is a kind of processing method of high-accuracy thin and long circular axis, may further comprise the steps:

A, select materials: the blank material adopts the cold drawn material of external diameter near the final products cylindrical;

The alignment of b, woolen cloth: the woolen cloth after modified is carried out alignment with the accurate straighteners of two running rollers;

The processing of c, cylindrical: adopt on centerless grinder that the method run through mill is carried out slightly to foreign round, fine finishining;

The processing of d, geometric properties: with the cylindrical that processes, precision is higher is that benchmark is processed remaining geometric properties;

E, final heat treatment: above-mentioned processing article surface is carried out conventional heat treatment;

Alignment after f, the final heat treatment: utilize outer chamfering on the cylindrical of thin and long shafts part two ends (short outer cone respectively with straightener on the inner cone combination of location tapered sleeve to form clamping and positioning; Location tapered sleeve mount pad on the straightener 8, screw, packing ring constitute positioning element; During alignment, thin and long shafts part places and prevents because of overvoltage damages on the supplemental support of positioning element, and left and right the moving of positioning element finished the loading, unloading part; Drive the part rotation and carry out the linearity inspection by a plurality of sensors;

G, other operation: handle routinely.

The present invention compared with prior art, as can be known from the above technical solutions:

1, with respect to the traditional handicraft method be to raw-material relative utilization rate:

A=B/C=[G/(π×r 12×L×ρ)]/[G/(π×r 22×L×ρ)]

=r 22/r 12=12.52/10.752

≈1.35

In the formula: the relative utilization rate of A=raw material; The B=new technology is to raw-material utilization rate; The C=traditional handicraft is to raw-material utilization rate; G=part net weight; r 1Raw material that=new technology adopts (cold drawn bar) section radius; r 2Raw material that=traditional handicraft adopts (hot rolling bar) section radius; The L=part length; G=part net weight; ρ=density of material.

Conclusion 1.35>1.Raw-material utilization rate is significantly increased.

2, owing to adopt cold drawn material and outer chamfering (short outer cone) the location alignment method of external diameter near the final products excircle dimension, in technical process, cancelled one at machining center hole, part two ends operation, twice top turning operation, one alignment process, to change three continuous grinding cylindricals be secondary continuous grinding cylindrical.Save five processes altogether.

3, centre bore is located and adopted outer chamfering (short outer) positioning mode to locate alignment: it is an important technology requirement of such part that the axis verticality of high-accuracy thin and long circular axis class tooth bar requires.Traditional method is that elder generation processes the location benchmark of centre bore as subsequent handling and alignment in the both ends of the surface of slender axles when beginning machining.And this invention is adopted be with the outer chamfering on the cylindrical of elongated gear rack axle two ends (short outer cone) respectively with the alignment positioning element on two cooperate with inner cone locating surface that the outer chamfering of part (weak point outer cone) has an identical cone angle to form two point location methods and locate alignment after the axis of elongated gear rack axle carries out final heat treatment.This method is compared with traditional centre bore location, under the situation that reaches same alignment precision, does not need the machining center hole, has saved operation, equipment and centre drill etc.On the other hand, this method is easy to realize, only needs getting final product with top being replaced with the inner cone keeper of the identical cone angle of the outer chamfering in elongated gear rack axle two ends (weak point outer cone) in 60 degree location in the detent mechanism of centre bore location traditionally.

In sum, owing to selecting for use cold drawn material to adopt outside cone angle location aligning method, thereby improved such production efficiency of products, reduced manufacturing cost as raw material, cancellation centre bore localization method near final excircle dimension.

Below advance beneficial effect of the present invention a bit is described by the specific embodiment.

Description of drawings

Accompanying drawing is 2 outer chamferings (short outer cone) positioning mode schematic diagram on the straightener.

Mark among the figure:

1, location tapered sleeve mount pad, 2, the location tapered sleeve, 3, screw, 4, packing ring, 5, thin and long shafts part, 6, supplemental support, 7, sensor, 8, straightener.

The specific embodiment

Below in conjunction with accompanying drawing and to produce the cylindrical final size is that the thin and long circular axis rack part of φ 21f5 (dimensional accuracy IT6), surface roughness 0.8 μ m, linearity 0.08mm, tooth bar precision 7D H GB/T10096-1988 is an example, the feature and the effect thereof of the processing method of the high-accuracy thin and long circular axis that foundation the present invention is proposed are described in detail as follows:

A, select materials: the blank material adopts the cold drawn material (final thin and long circular axis tooth bar cylindrical be φ 21, just select the cold drawn bar of φ 21.5) of external diameter near the final products cylindrical;

B, woollen alignment: for eliminating the blank material, guarantee the linearity requirement of thin and long shafts part, the woolen cloth after modified is carried out alignment with two running rollers precision straighteners in the flexural deformation that produces through modified back;

The processing of c, cylindrical: adopt on centerless grinder that the method run through mill is carried out slightly to foreign round, fine finishining;

The processing of d, geometric properties: with the cylindrical that processes, precision is higher be benchmark to remaining partly geometric properties (as rounded corner outside the two ends etc.) process, can reach the size and the accuracy of form and position preferably;

The processing of e, tooth bar profile of tooth: manufacturing gear strip flute profile according to a conventional method.

F, final heat treatment:, can arrange conventional final heat treatment such as carburizing (nitrogen or carbo-nitriding) quenching, tempering is carried out on surfaces such as tooth portion for improving the performances such as wearability of the flank of tooth.

Alignment after g, the final heat treatment: referring to Fig. 1, utilize on the cylindrical of thin and long shafts part (5) two ends outer chamfering (short outer cone) respectively with straightener (8) on the inner cone combination of location tapered sleeve (2) to form clamping and positioning; Location tapered sleeve mount pad (1) on the straightener (8), screw (3), packing ring (4) constitute positioning element; During alignment, thin and long shafts part (5) places and prevents because of overvoltage damages on the supplemental support (6) of positioning element, and left and right the moving of positioning element finished the loading, unloading part; Drive the part rotation and carry out the linearity inspection by a plurality of sensors (7); Linearity reaches 600mm length in 0.13mm behind the school, and does not need centre bore to make the alignment benchmark.

H, other operation: handle routinely.

Prior art and contrast of the present invention and analytical table

Claims (2)

1, a kind of processing method of high-accuracy thin and long circular axis may further comprise the steps:
A, select materials:
The alignment of b, woolen cloth: the woolen cloth after modified is carried out alignment with the accurate straighteners of two running rollers;
The processing of c, cylindrical: adopt on centerless grinder that the method run through mill is carried out slightly to foreign round, fine finishining;
The processing of d, geometric properties: with the cylindrical that processes, precision is higher is that benchmark is processed remaining geometric properties;
E, final heat treatment: above-mentioned processing article surface is carried out conventional heat treatment;
Alignment after f, the final heat treatment: utilize on the cylindrical of thin and long shafts part (5) two ends outer chamfering respectively with straightener (8) on the inner cone combination of location tapered sleeve (2) to form clamping and positioning; Location tapered sleeve mount pad (1) on the straightener 8, screw (3), packing ring (4) constitute positioning element; During alignment, thin and long shafts part (5) places and prevents because of overvoltage damages on the supplemental support (6) of positioning element, and left and right the moving of positioning element finished the loading, unloading part; Drive the part rotation and carry out the linearity inspection by a plurality of sensors (7); G, other operation: handle routinely.
2, the processing method of high-accuracy thin and long circular axis as claimed in claim 1 is characterized in that: select materials and adopt the cold drawn material of external diameter near the final products cylindrical.
CNA2008100688891A 2008-08-29 2008-08-29 High-accuracy thin and long circular axis processing method CN101342654A (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102233509A (en) * 2010-04-26 2011-11-09 道德企业有限公司 Method for manufacturing alloy steel receiving shaft
CN102700981A (en) * 2012-06-19 2012-10-03 无锡市百顺机械厂 Pinch roll
CN102728998A (en) * 2011-04-07 2012-10-17 温永林 Anti-slip rotating shaft machining process
CN102825431A (en) * 2012-09-07 2012-12-19 贵州凯星液力传动机械有限公司 Machining method of high-abrasion resistance valve core
CN102935523A (en) * 2012-11-08 2013-02-20 无锡京华重工装备制造有限公司 Double-column vertical lathe thimble structure
CN102962642A (en) * 2012-11-16 2013-03-13 大连洁能重工机械有限公司 Wind turbine torsion shaft machining process
CN103100828A (en) * 2013-01-23 2013-05-15 林小平 Manufacturing method of miniature shaft
CN103447357A (en) * 2013-08-30 2013-12-18 神华集团有限责任公司 Method for straightening stirrer shaft
CN106271448A (en) * 2016-08-31 2017-01-04 中国航天科技集团公司烽火机械厂 A kind of long mill bar processing method
CN107486681A (en) * 2016-06-13 2017-12-19 中国科学院沈阳科学仪器股份有限公司 A kind of thin and long shafts part processing technology
CN108161348A (en) * 2017-12-13 2018-06-15 宁波市海园毅超轴业有限公司 A kind of power tool shaft and its preparation process
CN110027604A (en) * 2019-04-09 2019-07-19 上海格尔汽车科技发展有限公司 A kind of steering rack and its manufacturing method
CN110202330A (en) * 2019-06-05 2019-09-06 山东金马工业集团机械锻造厂 A kind of processing method of the elongated axis of cone
CN110499414A (en) * 2018-05-17 2019-11-26 苏州苏信特钢有限公司 The processing technology of shaft forgings

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102233509A (en) * 2010-04-26 2011-11-09 道德企业有限公司 Method for manufacturing alloy steel receiving shaft
CN102728998A (en) * 2011-04-07 2012-10-17 温永林 Anti-slip rotating shaft machining process
CN102700981A (en) * 2012-06-19 2012-10-03 无锡市百顺机械厂 Pinch roll
CN102825431A (en) * 2012-09-07 2012-12-19 贵州凯星液力传动机械有限公司 Machining method of high-abrasion resistance valve core
CN102935523A (en) * 2012-11-08 2013-02-20 无锡京华重工装备制造有限公司 Double-column vertical lathe thimble structure
CN102962642B (en) * 2012-11-16 2015-08-26 大连洁能重工机械有限公司 Wind turbine torsion shaft processing technology
CN102962642A (en) * 2012-11-16 2013-03-13 大连洁能重工机械有限公司 Wind turbine torsion shaft machining process
CN103100828A (en) * 2013-01-23 2013-05-15 林小平 Manufacturing method of miniature shaft
CN103100828B (en) * 2013-01-23 2015-04-08 林小平 Manufacturing method of miniature shaft
CN103447357A (en) * 2013-08-30 2013-12-18 神华集团有限责任公司 Method for straightening stirrer shaft
CN103447357B (en) * 2013-08-30 2015-07-29 神华集团有限责任公司 The aligning method of stirrer shaft
CN107486681A (en) * 2016-06-13 2017-12-19 中国科学院沈阳科学仪器股份有限公司 A kind of thin and long shafts part processing technology
CN107486681B (en) * 2016-06-13 2019-04-16 中国科学院沈阳科学仪器股份有限公司 A kind of thin and long shafts part processing technology
CN106271448A (en) * 2016-08-31 2017-01-04 中国航天科技集团公司烽火机械厂 A kind of long mill bar processing method
CN108161348A (en) * 2017-12-13 2018-06-15 宁波市海园毅超轴业有限公司 A kind of power tool shaft and its preparation process
CN108161348B (en) * 2017-12-13 2019-12-17 博思韦精密工业(宁波)有限公司 Electric tool shaft and preparation process thereof
CN110499414A (en) * 2018-05-17 2019-11-26 苏州苏信特钢有限公司 The processing technology of shaft forgings
CN110027604A (en) * 2019-04-09 2019-07-19 上海格尔汽车科技发展有限公司 A kind of steering rack and its manufacturing method
CN110202330A (en) * 2019-06-05 2019-09-06 山东金马工业集团机械锻造厂 A kind of processing method of the elongated axis of cone

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