CN103014286A - Thermal treatment process of slender axle with key groove - Google Patents
Thermal treatment process of slender axle with key groove Download PDFInfo
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- CN103014286A CN103014286A CN 201210502699 CN201210502699A CN103014286A CN 103014286 A CN103014286 A CN 103014286A CN 201210502699 CN201210502699 CN 201210502699 CN 201210502699 A CN201210502699 A CN 201210502699A CN 103014286 A CN103014286 A CN 103014286A
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Abstract
The invention discloses a thermal treatment process of a slender axle with a key groove. The thermal treatment process is characterized by comprising the process steps of: filling an insulation layer, preheating, quenching, straightening and tempering. In a treatment process, the insulation layer is filled in the key groove to ensure that the cooling speed of the opening of the key groove is basically consistent with the cooling speed of an axle body, thus the deformation of a workpiece is reduced, and the qualified rate of the processed workpiece reaches above 95 percent. The thermal treatment process has the advantages of convenience for operation, high production efficiency and wide application range.
Description
Technical field
The present invention relates to the thermal treatment process in a kind of mechanical workout, particularly a kind of slender axles thermal treatment process with keyway.
Background technology
At present, to heat-treating in the course of processing with the slender axles of keyway, be with its direct heating, because the keyway mouth is faster than axis body cooling, cause easily the distortion that workpiece is larger, cause workpiece not reach design requirements and scrap.As adopt 45
#The band keyway slender axles of diameter 32 ㎜ that steel is done, long 380 ㎜, require thermal treatment after bending deformation quantity less than 0.05 ㎜, and adopt the maximum deformation quantity after the Conventional Heat Treatment method to reach 0.3～0.4 ㎜, qualification rate only is about 70%.
Summary of the invention
The objective of the invention is in order to overcome above-mentioned weak point, and the slender axles thermal treatment process with keyway that a kind of processing work deflection is little, qualification rate is high is provided.
For achieving the above object, the concrete technology step of the present invention's employing is as follows:
1, filling heat insulating wall: in the keyway of pending axle, fill real thermal insulation layer.
2, preheating: the workpiece of filling real thermal insulation layer in the keyway is placed in the process furnace, under 450 ℃～500 ℃ temperature, preheat 29～31 minutes.
3, quench: the workpiece after above-mentioned preheating vertically is hung in the salt bath furnace, is heated to 830 ℃～850 ℃, be incubated after 10～13 minutes, rapidly workpiece is taken out, keyway upwards keeps flat in the salt solution of the concentration 10% of quenching, and treats to take out when workpiece temperature is down to 200 ℃.
4, alignment: will be that the workpiece of 0.2～0.3 ㎜ places and carries out alignment on the straightener through the maximum deformation quantity after the quench treatment, workpiece temperature remains between 150 ℃～200 ℃ during alignment.
5, temper: will vertically be hung in the tempering stove through the workpiece that alignment is processed, be warming up to 460 ℃, be incubated after 60 minutes, take out and be cooled to room temperature.
The present invention in the treating processes, fills real thermal insulation layer owing to adopt above processing method in the keyway, guarantee that the speed of cooling of keyway mouth and axis body is basically identical, has reduced the deflection of workpiece, and the qualification rate of processing work is up to more than 95%.Easy to operate, production efficiency is high, and is applied widely.
Embodiment
1, in the keyway of pending axle, fills real asbestos twine thermal insulation layer, and itself and axis body are bundled.
2, the workpiece of filling real thermal insulation layer in the keyway is placed in the process furnace, under 450 ℃～500 ℃ temperature, preheat 29～31 minutes.
3, the workpiece after above-mentioned preheating vertically is hung in the salt bath furnace, is heated to 830 ℃～850 ℃, be incubated after 10～13 minutes, rapidly workpiece is taken out, keyway upwards keeps flat in the salt solution of the concentration 10% of quenching, and treats to take out when workpiece temperature is down to 200 ℃.
4, will place through the workpiece after the above-mentioned quench treatment detect with the enterprising line bend deflection of top check utensil after, using straightener is that the workpiece of 0.2～0.3 ㎜ carries out alignment to maximum deformation quantity, workpiece temperature remains between 150 ℃～200 ℃ during alignment.
5, will vertically be hung on through the workpiece that alignment is processed in the well formula tempering stove, be warming up to 460 ℃, be incubated after 60 minutes, and take out and be cooled to room temperature.
Claims (1)
1. slender axles thermal treatment process with keyway is characterized in that through following processing step:
(1), filling heat insulating wall: in the keyway of pending axle, fill real thermal insulation layer;
(2), preheating: the workpiece of filling real thermal insulation layer in the keyway is placed in the process furnace, under 450 ℃～500 ℃ temperature, preheat 29～31 minutes;
(3), quench: the workpiece after above-mentioned preheating vertically is hung in the salt bath furnace, is heated to 830 ℃～850 ℃, be incubated after 10～13 minutes, rapidly workpiece is taken out, keyway upwards keeps flat in the salt solution of the concentration 10% of quenching, and treats to take out when workpiece temperature is down to 200 ℃;
(4), alignment: will be that the workpiece of 0.2～0.3 ㎜ places and carries out alignment on the straightener through the maximum deformation quantity after the quench treatment, workpiece temperature remains between 150 ℃～200 ℃ during alignment;
(5), temper: will vertically be hung in the tempering stove through the workpiece that alignment is processed, be warming up to 460 ℃, be incubated after 60 minutes, take out and be cooled to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210502699 CN103014286A (en) | 2012-11-30 | 2012-11-30 | Thermal treatment process of slender axle with key groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210502699 CN103014286A (en) | 2012-11-30 | 2012-11-30 | Thermal treatment process of slender axle with key groove |
Publications (1)
| Publication Number | Publication Date |
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| CN103014286A true CN103014286A (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210502699 Pending CN103014286A (en) | 2012-11-30 | 2012-11-30 | Thermal treatment process of slender axle with key groove |
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| CN (1) | CN103014286A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111485071A (en) * | 2020-04-01 | 2020-08-04 | 南京工艺装备制造有限公司 | Quenching, tempering and straightening method for asymmetric structure clamp body in machining center |
-
2012
- 2012-11-30 CN CN 201210502699 patent/CN103014286A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111485071A (en) * | 2020-04-01 | 2020-08-04 | 南京工艺装备制造有限公司 | Quenching, tempering and straightening method for asymmetric structure clamp body in machining center |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20130403 |