CN103170802A - Processing method for improving stability of Gcr15 main shaft - Google Patents

Processing method for improving stability of Gcr15 main shaft Download PDF

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Publication number
CN103170802A
CN103170802A CN2013100685926A CN201310068592A CN103170802A CN 103170802 A CN103170802 A CN 103170802A CN 2013100685926 A CN2013100685926 A CN 2013100685926A CN 201310068592 A CN201310068592 A CN 201310068592A CN 103170802 A CN103170802 A CN 103170802A
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CN
China
Prior art keywords
processing
time
gcr15
main shaft
heat treatment
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Pending
Application number
CN2013100685926A
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Chinese (zh)
Inventor
庞青
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NANJING ZIWEI PRECISION MACHINERY CO Ltd
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NANJING ZIWEI PRECISION MACHINERY CO Ltd
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Priority to CN2013100685926A priority Critical patent/CN103170802A/en
Publication of CN103170802A publication Critical patent/CN103170802A/en
Pending legal-status Critical Current

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Abstract

The invention provides a processing method for improving stability of a Gcr15 main shaft. The processing method for improving the stability of the Gcr15 main shaft comprises the following steps: blanking; conducting annealing process on processing elements; sequentially conducing lathe processing, mill processing and tongs processing on the processing elements; then conducting heat processing on the processing elements; conducting grinding on positioning holes; and eventually conducting accurate grinding. Gcr15 materials are processed in a freezing mode, retained austenite is removed, and material stability is improved; tempering and aging processing are conducted for four times, material inner stress is fully released, and stress deformation does not exist; the positioning holes are firstly milled and then grinded before mill processing, and high accuracy of positioning is guaranteed.

Description

A kind of processing method that improves Gcr15 main shaft stability
Technical field
The present invention relates to a kind of processing method, specifically the processing method of main shaft.
Background technology
Miniature numerical control machine tool chief axis (CKA7040) machining accuracy, distortion (stress release) have the effect of restriction and technical bottleneck to the lathe overall precision.The selection of material and heat treatment rear stability are all influential to precision.The improvement of processing method is influential to the terminal precision, and the head fracture easily occurs 40 type main shafts.
Summary of the invention
The objective of the invention is the deficiency that exists for prior art, provide that a kind of stability is high, the processing method of the Gcr15 main shaft of long service life.
For achieving the above object, the technical solution used in the present invention is a kind of processing method that improves Gcr15 main shaft stability, comprises the following steps:
Blanking; Workpiece is carried out annealing process, workpiece is heated to 500 ° of C-600 ° of C, cool to normal temperature with the furnace; Workpiece is machined, mills processing and pincers processing successively; Then workpiece is heat-treated; Then locating hole is ground; Finish grind at last;
Heat treatment step is as follows:
(1) at first workpiece is heated 35-45min under 830-850 ° of C, then vertically put into the cooling fluid 2-3min that quenches;
(2) then be cooled to normal temperature, then carry out tempering, temperature is 150 ° of C-180 ° of C, and the time is 10h-12h;
(3) carry out freezing processing after tempering, cryogenic temperature is-and 100C is ° to-160 ° of C, and the time is 2.5h-3.5h; Eliminate retained austenite;
(4) then locating hole is roughly ground, the mill amount is 0.2mm, carries out afterwards Ageing Treatment, and aging temp is 160 ° of C-180 ° of C, and the time is 3h-4h;
(5) locating hole is carried out half correct grinding, the mill amount is 0.1mm, carries out afterwards Ageing Treatment for the second time, and aging temp is 170 ° of C-180 ° of C, and the time is 10h-12h;
(6) locating hole is carried out half correct grinding again, the mill amount is 0.05mm, carries out at last Ageing Treatment for the third time, and aging temp is 170 ° of C-180 ° of C, and the time is 12h-14h.
Preferably, in described heat treatment step (1), be 40min heat time heating time.
Preferably, in described heat treatment step (2), temperature is 170 ° of C, and the time is 12h.
Preferably, in described heat treatment step (3), cryogenic temperature is-130 ° of C, and the time is 3h.
Preferably, in described heat treatment step (4), aging temp is 170 ° of C, and the time is 4h.
Preferably, in described heat treatment step (5), aging temp is 180 ° of C, and the time is 12h.
Preferably, in described heat treatment step (6), aging temp is 180 ° of C, and the time is 14h.
Beneficial effect: in method provided by the invention, after Gcr15 material freezing processing, eliminate retained austenite, improved stability of material; Divide and carry out tempering and timeliness processing for four times, material internal stress is able to abundant release, there is no stress deformation; The mill first being processed is first ground afterwards locating hole and is ground, and guarantees the high-precision of positioning accuracy.
The specific embodiment
Below in conjunction with specific embodiment, further illustrate the present invention, the present embodiment is implemented under take technical solution of the present invention as prerequisite, should understand these embodiment and only be used for explanation the present invention and be not used in and limit the scope of the invention.
Embodiment one:
Workpiece is carried out annealing process, workpiece is heated to 500 ° of C-600 ° of C, cool to normal temperature with the furnace; Workpiece is machined, mills processing and pincers processing successively; Then workpiece is heat-treated; Then locating hole is ground; Finish grind at last and obtain finished product.
Heat treatment step is as follows:
(1) at first workpiece is heated 35min under 830 ° of C, then vertically put into the cooling fluid 2min that quenches;
(2) then be cooled to normal temperature, then carry out tempering, temperature is 150 ° of C, and the time is 10h;
(3) carry out freezing processing after tempering, cryogenic temperature is-100 ° of C, and the time is 2.5h; Eliminate retained austenite;
(4) then locating hole is roughly ground, the mill amount is 0.2mm, carries out afterwards Ageing Treatment, and aging temp is 160 ° of C, and the time is 3h;
(5) locating hole is carried out half correct grinding, the mill amount is 0.1mm, carries out afterwards Ageing Treatment for the second time, and aging temp is 170 ° of C, and the time is 10h;
(6) locating hole is carried out half correct grinding again, the mill amount is 0.05mm, carries out at last Ageing Treatment for the third time, and aging temp is 170 ° of C, and the time is 12h.
Embodiment two:
Workpiece is carried out annealing process, workpiece is heated to 500 ° of C-600 ° of C, cool to normal temperature with the furnace; Workpiece is machined, mills processing and pincers processing successively; Then workpiece is heat-treated; Then locating hole is ground; Finish grind at last;
Heat treatment step is as follows:
(1) at first workpiece is heated 45min under 850 ° of C, then vertically put into the cooling fluid 3min that quenches;
(2) then be cooled to normal temperature, then carry out tempering, temperature is 180 ° of C, and the time is 12h;
(3) carry out freezing processing after tempering, cryogenic temperature is-160 ° of C, and the time is 3.5h; Eliminate retained austenite;
(4) then locating hole is roughly ground, the mill amount is 0.2mm, carries out afterwards Ageing Treatment, and aging temp is 180 ° of C, and the time is 3.5h;
(5) locating hole is carried out half correct grinding, the mill amount is 0.1mm, carries out afterwards Ageing Treatment for the second time, and aging temp is 180 ° of C, and the time is 11h;
(6) locating hole is carried out half correct grinding again, the mill amount is 0.05mm, carries out at last Ageing Treatment for the third time, and aging temp is 180 ° of C, and the time is 13h.
Embodiment three:
Workpiece is carried out annealing process, workpiece is heated to 500 ° of C-600 ° of C, cool to normal temperature with the furnace; Workpiece is machined, mills processing and pincers processing successively; Then workpiece is heat-treated; Then locating hole is ground; Finish grind at last;
Heat treatment step is as follows:
(1) at first workpiece is heated 40min under 840 ° of C, then vertically put into the cooling fluid 2min that quenches;
(2) then be cooled to normal temperature, then carry out tempering, temperature is 170 ° of C, and the time is 10h-12h;
(3) carry out freezing processing after tempering, cryogenic temperature is-130 ° of C, and the time is 3h; Eliminate retained austenite;
(4) then locating hole is roughly ground, the mill amount is 0.2mm, carries out afterwards Ageing Treatment, and aging temp is 170 ° of C, and the time is 4h;
(5) locating hole is carried out half correct grinding, the mill amount is 0.1mm, carries out afterwards Ageing Treatment for the second time, and aging temp is 180 ° of C, and the time is 12h;
(6) locating hole is carried out half correct grinding again, the mill amount is 0.05mm, carries out at last Ageing Treatment for the third time, and aging temp is 180 ° of C, and the time is 14h.

Claims (7)

1. processing method that improves Gcr15 main shaft stability comprises the following steps:
Blanking; Workpiece is carried out annealing process; Workpiece is machined, mills processing and pincers processing successively; Then workpiece is heat-treated; Then locating hole is ground; Finish grind at last;
It is characterized in that heat treatment step is as follows:
(1) at first workpiece is heated 35-45min under 830-850 ° of C, then vertically put into the cooling fluid 2-3min that quenches;
(2) then be cooled to normal temperature, then carry out tempering, temperature is 150 ° of C-180 ° of C, and the time is 10h-12h;
(3) carry out freezing processing after tempering, cryogenic temperature is extremely-160 ° of C of-100 ° of C, and the time is 2.5h-3.5h;
(4) then locating hole is roughly ground, the mill amount is 0.2mm, carries out afterwards Ageing Treatment, and aging temp is 160 ° of C-180 ° of C, and the time is 3h-4h;
(5) locating hole is carried out half correct grinding, the mill amount is 0.1mm, carries out afterwards Ageing Treatment for the second time, and aging temp is 170 ° of C-180 ° of C, and the time is 10h-12h;
(6) locating hole is carried out half correct grinding again, the mill amount is 0.05mm, carries out at last Ageing Treatment for the third time, and aging temp is 170 ° of C-180 ° of C, and the time is 12h-14h.
2. a kind of processing method that improves Gcr15 main shaft stability according to claim 1, it is characterized in that: in described heat treatment step (1), be 40min heat time heating time.
3. a kind of processing method that improves Gcr15 main shaft stability according to claim 1, it is characterized in that: in described heat treatment step (2), temperature is 170 ° of C, and the time is 12h.
4. a kind of processing method that improves Gcr15 main shaft stability according to claim 1, it is characterized in that: in described heat treatment step (3), cryogenic temperature is-130 ° of C, and the time is 3h.
5. a kind of processing method that improves Gcr15 main shaft stability according to claim 1, it is characterized in that: in described heat treatment step (4), aging temp is 170 ° of C, and the time is 4h.
6. a kind of processing method that improves Gcr15 main shaft stability according to claim 1, it is characterized in that: in described heat treatment step (5), aging temp is 180 ° of C, and the time is 12h.
7. a kind of processing method that improves Gcr15 main shaft stability according to claim 1, it is characterized in that: in described heat treatment step (6), aging temp is 180 ° of C, and the time is 14h.
CN2013100685926A 2013-03-04 2013-03-04 Processing method for improving stability of Gcr15 main shaft Pending CN103170802A (en)

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Application Number Priority Date Filing Date Title
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Cited By (6)

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Publication number Priority date Publication date Assignee Title
CN103447782A (en) * 2013-09-12 2013-12-18 昆山奥德鲁自动化技术有限公司 Machining method of lathe spindle
CN104128759A (en) * 2014-07-24 2014-11-05 成都亨通兆业精密机械有限公司 Lathe spindle machining process beneficial to spindle surface hardness
CN104128762A (en) * 2014-07-24 2014-11-05 成都亨通兆业精密机械有限公司 Lathe spindle machining technology facilitating machining efficiency and product quality
CN104128754A (en) * 2014-07-24 2014-11-05 成都亨通兆业精密机械有限公司 Lathe spindle machining technology facilitating surface quality
CN105364409A (en) * 2014-08-14 2016-03-02 南京紫薇精密机械有限公司 Manufacturing method of special-use chuck for ultra-high precision groove grinding machine
CN106334908A (en) * 2016-08-19 2017-01-18 四川中物红宇科技有限公司 Mechanical long shaft finish machining method and obtained mechanical long shaft

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103447782A (en) * 2013-09-12 2013-12-18 昆山奥德鲁自动化技术有限公司 Machining method of lathe spindle
CN104128759A (en) * 2014-07-24 2014-11-05 成都亨通兆业精密机械有限公司 Lathe spindle machining process beneficial to spindle surface hardness
CN104128762A (en) * 2014-07-24 2014-11-05 成都亨通兆业精密机械有限公司 Lathe spindle machining technology facilitating machining efficiency and product quality
CN104128754A (en) * 2014-07-24 2014-11-05 成都亨通兆业精密机械有限公司 Lathe spindle machining technology facilitating surface quality
CN105364409A (en) * 2014-08-14 2016-03-02 南京紫薇精密机械有限公司 Manufacturing method of special-use chuck for ultra-high precision groove grinding machine
CN106334908A (en) * 2016-08-19 2017-01-18 四川中物红宇科技有限公司 Mechanical long shaft finish machining method and obtained mechanical long shaft
CN106334908B (en) * 2016-08-19 2018-09-25 四川中物红宇科技有限公司 A kind of method for fine finishing of machinery long axis and obtained mechanical long axis

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