CN103952525A - Method for processing spring steel arch belt - Google Patents
Method for processing spring steel arch belt Download PDFInfo
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- CN103952525A CN103952525A CN201410157284.5A CN201410157284A CN103952525A CN 103952525 A CN103952525 A CN 103952525A CN 201410157284 A CN201410157284 A CN 201410157284A CN 103952525 A CN103952525 A CN 103952525A
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- spring steel
- steel bow
- blank
- bow band
- working method
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Abstract
The invention discloses a method for processing a spring steel arch belt. The method comprises the following steps: 1) feeding molten steel to a spring steel arch belt mold; 2) stamping an arch belt center groove from a spring steel arch belt blank; 3) coating a non-decarburization coating on the spring steel arch belt blank, heating to 840-870 DEG C, carrying out heat preservation for 30-40 minutes, and then quenching and cooling the spring steel arch belt blank coated with the non-decarburization coating in quenching oil at 75-85 DEG C for 4-6 minutes; 4) carrying out tempering treatment on the spring steel arch belt blank which is quenched and cooled; 5) carrying out cooling treatment of a nitrate bath on the tempered spring steel arch belt blank; and 6) polishing the top surface and the bottom surface of the spring steel arch belt blank cooled by the nitrate bath through a grinding machine, so as to form a spring steel arch belt product. By adopting the method, the strength of the spring steel arch belt is improved, the service life is prolonged, and the rotation speed of a double twister is ensured.
Description
Technical field
The present invention relates to the spring steel bow band in the double twisting device of twisting steel cord, refer to particularly a kind of working method of spring steel bow band.
Background technology
Along with developing rapidly of automobile industry, the double twisting device device requirement of producing tire steel cord is increased day by day.When double twisting device twisting steel cord, rotating disk high speed rotating, steel cord, because the effect of centrifugal force throws away, now needs a kind of high-intensity bow to bring constraint steel cord.Existing spring steel bow band adopts conventional processing mode to make, through milling processing, heat-treating profiled.The spring steel bow band strength of this routine is not high, fragile, only 2～3 months mean life, and if the bow band of fracture process and tend to damage equipment not in time, reduced the speed of rotation of double twisting device, increased the production cost of enterprise.
Summary of the invention
Object of the present invention is exactly the working method that a kind of spring steel bow band will be provided, and uses the spring steel bow band that this working method is produced to have higher intensity, and significantly improve work-ing life.
For realizing this object, the working method that the designed spring steel bow of the present invention is with, is characterized in that, it comprises the steps:
Step 1: molten steel is lowered in existing spring steel bow band mould to cooling rear formation spring steel bow band blank;
Step 2: stamp out bow with punch press on spring steel bow band blank and be with central channel, then beat Go-over mould open holes with drilling machine on spring steel bow band blank, then spring steel bow band blank is carried out to chamfering deburring processing;
Step 3: be with the anti-decarburizing coating of blank surface-coated through step 2 spring steel bow after treatment, then pack the spring steel bow band blank that has applied anti-decarburizing coating into heat treatment tooling fixing, and the spring steel bow band blank that has applied anti-decarburizing coating is heated to 840 DEG C～870 DEG C, and be incubated 30～40min, then in the quenching oil of 75～85 DEG C, the described spring steel bow that has applied anti-decarburizing coating is with to blank quench cooled 4～6 minutes;
Step 4: the spring steel bow band blank through quench cooled processing is carried out to temper, and the tempering temperature in temper process is 420～440 DEG C, and the soaking time in temper process is 60～90 minutes;
Step 5: the spring steel bow band blank through temper is carried out to nitric acid salt bath cooling process;
Step 6: by grinding machine, polished in spring steel bow band blank end face and bottom surface after nitric acid salt bath cooling process, and by grinding machine, the spring steel bow band blank two ends after nitric acid salt bath cooling process are polished to chamfering, form spring steel bow band finished product;
Step 7, carries out hardness detection and metallographic detection to spring steel bow band finished product.
Further, the molten steel in described step 1 is 60Si2Mn molten steel.
Further, described quenching oil is made up of the machine oil of weight percent content 60～65% and the heavy oil of weight percent content 35～40%.
Further, in described step 5, the temperature of described nitric acid salt bath is 165～175 DEG C.
Further, in described step 5, the spring steel bow band blank after nitric acid salt bath cooling process is cleaned and dries up processing.
Further, in described step 5, after the spring steel bow band blank of temper carries out nitric acid salt bath cooling process, making spring steel bow band blank hardness is Rockwell hardness 40～45.
Further, in described step 6, grinding machine is with blank end face and bottom surface to be polished into surfaceness on spring steel bow and is Ra(profile arithmetic average error) below 0.8.
Further, in described step 6, grinding machine is polished into 10 ° by spring steel bow with the chamfering at blank two ends.
Further, in described step 5, nitric acid salt bath comprises NaNO
2and KNO
2, wherein, NaNO
2quality and KNO
2the ratio of quality be 1 to 1.
The present invention has realized strain hardening by bow is set with the punch steps of central channel, has reduced stress concentration impact with fatigue lifetime on bow of central channel.In the present invention, the cooling cantle band of nitric acid salt bath obtains good weave construction, is out of shape very little; And quenching cantle band is stress situation, can greatly reduce bow with the cracking danger in use procedure.
In sum, the present invention, by setting gradually the salt-cooled treatment step of above-mentioned heating, quench cooled, tempering and nitric acid, has improved intensity and the work-ing life of spring steel bow band, has ensured the speed of rotation of double twisting device.The life-span of the spring steel bow band that use the present invention produces has been brought up to 10 months by original 2～3 months, has reduced the production cost of enterprise.
Brief description of the drawings
Fig. 1 is the structural representation of spring steel bow band;
Fig. 2 is that the A-A of Fig. 1 is to sectional structure schematic diagram;
Fig. 3 is the structural representation of heat treatment tooling in the present invention.
Wherein, 1-bow band central channel, 2-Go-over mould open holes, 3-heat treatment tooling, 3.1-transverse plate, 3.2-longitudinally plate, 3.3-adjusting slotted hole, 3.4-dog screw, 3.5-spring steel bow band erection column, 3.6-heat treatment tooling open holes, 4-end face, 5-bottom surface, 6-chamfering.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
A working method for spring steel bow band, is characterized in that, it comprises the steps:
Step 1: molten steel is lowered to in existing spring steel bow band mould, (when blanking, the thickness direction of mould stays the surplus of 0.3～0.5mm, this surplus is used to provide enough mill process redundancy on the one hand, make on the other hand surperficial issuable Decarburized layer be removed), cooling rear formation spring steel bow band blank;
Step 2: stamp out on spring steel bends with blank with punch press (350T hydraulic press) and bend the bow band central channel 1 stamping out with central channel 1(for strengthening bow band), on spring steel bow band blank, beat Go-over mould open holes 2(Go-over mould open holes 2 for Go-over mould is installed with drilling machine again), then spring steel bow band blank is carried out to chamfering deburring processing (chamfering deburring processing is used for reducing spring steel bow and is with blank fried mouth raw edges when the follow-up quench treatment);
Step 3: be with the anti-decarburizing coating of blank surface-coated through step 2 spring steel bow after treatment, then pack the spring steel bow band blank that has applied anti-decarburizing coating into heat treatment tooling 3 fixing, and the spring steel bow band blank that has applied anti-decarburizing coating is heated to 840 DEG C～870 DEG C, and be incubated 30～40min, then (in step 3, each processing parameter determines in the quenching oil of 75～85 DEG C, the described spring steel bow that has applied anti-decarburizing coating to be with to blank quench cooled 4～6 minutes, contribute to crystal grain thinning, improve toughness proof strength simultaneously);
Step 4: the spring steel bow band blank through quench cooled processing is carried out to temper, tempering temperature in temper process is 420～440 DEG C, soaking time in temper process is 60～90 minutes, and the setting of above-mentioned tempering temperature and soaking time can increase sorbite ratio and improve plasticity and toughness;
Step 5: the spring steel bow band blank through temper is carried out to nitric acid salt bath cooling process;
Step 6: by grinding machine, polished in spring steel bow band blank end face 4 and bottom surface 5 after nitric acid salt bath cooling process, and by grinding machine, the spring steel bow band blank two ends after nitric acid salt bath cooling process are polished to chamfering 6, form spring steel bow band finished product.
Step 7, carries out hardness detection and metallographic detection to spring steel bow band finished product, and it is qualified product that guarantee is used the spring steel bow on double twisting device to be with.
Molten steel in the step 1 of technique scheme is 60Si2Mn molten steel, and it is high that this kind of molten steel has tensile strength, the advantage of good toughness after suitable thermal treatment.
In technique scheme, described quenching oil is made up of the machine oil of weight percent content 60～65% and the heavy oil of weight percent content 35～40%.The ratio of above-mentioned heavy oil and machine oil can ensure the hardening capacity of quench treatment.The composition of this quenching oil can ensure the hardening capacity of quench treatment.
In the step 5 of technique scheme, the temperature of described nitric acid salt bath is 165～175 DEG C.Nitric acid salt bath comprises NaNO
2and KNO
2, wherein, NaNO
2quality and KNO
2the ratio of quality be 1 to 1.The present invention controls the rate of cooling of step 5 by controlling the component proportions of above-mentioned nitrate.
In the step 5 of technique scheme, the spring steel bow band blank after nitric acid salt bath cooling process is cleaned and dries up processing.
In the step 5 of technique scheme, after the spring steel bow band blank of temper carries out nitric acid salt bath cooling process, making spring steel bow band blank hardness is Rockwell hardness 40～45.
In the step 6 of technique scheme, grinding machine is polished into surfaceness by spring steel bow band blank end face and bottom surface and is Ra0.8 following (this roughness can improve be unlikely to again to increase too many cost fatigue lifetime).Can improve like this fatigue strength of spring steel bow band.
Wind when grinding machine is polished into spring steel bow 10 ° of above-mentioned chamferings of 10 ° and is conducive to reduce spring steel bow band and runs up with the chamfering at blank two ends in the step 6 of technique scheme is made an uproar and windage, and unlikely strength decreased is too many again.
The present invention is in the specific implementation: in above-mentioned steps 1, form spring steel bend length with blank be 920mm, wide for 25mm, thick be 2mm, its material composition content is designated as C0.61%, Si1.7%, Mn0.75%, Cr0.32%, P+S≤0.04% by weight percentage, and surplus is iron and other trace impurity.
In above-mentioned steps 2, bow band central channel 1 is circular groove, and its groove depth is 0.5mm, and groove inside radius R is 8mm, and described Go-over mould open holes 2 has hole and 4 holes that diameter phi is 5.5mm that 28 diameter phi are 3mm.Chamfering deburring processing, long limit C0.3, hole C0.2.
In above-mentioned steps 3, spring steel bow band blank is heated to 840 DEG C, and is incubated 30min, after in the quenching oil of 80 DEG C by spring steel bow band blank quench cooled 4 minutes, this quenching oil is made up of weight percent content 60% machine oil and weight percent content 40% heavy oil;
In above-mentioned steps 4, the tempering temperature of temper process is 430 DEG C, and the soaking time in temper process is 70 minutes;
In above-mentioned steps 6, in spring steel is bent to the process of polishing with blank, the grinding tolerance of bow with central channel 1 is 0.1mm; Spring steel bow is clamped on the frock clamp with 8 ° of inclination angles and completes chamfering with blank.
In technique scheme, heat treatment tooling 3 surrounds tower structure by two transverse plates 3.1 and two longitudinal plates 3.2, transverse plate 3.1 is positioned at longitudinal plate 3.2 belows, the two ends of described transverse plate 3.1 are provided with and regulate slotted hole 3.3, longitudinally the two ends of plate 3.2 are provided with and the dog screw 3.4 that regulates slotted hole 3.3 to mate, and described each longitudinal plate 3.2 is provided with row's spring steel bow band erection column 3.5.When spring steel bow band is installed, spring steel bow is fit into corresponding multiple spring steel bow band erection columns 3.5 with the heat treatment tooling open holes 3.6 at two ends, when use, pass through regulate dog screw 3.4 and regulate slotted hole 3.3, can adjust spring steel and bend the elasticity while being with heating.This heat treatment tooling 3 can be processed multiple spring steel bow bands simultaneously.
The content that this specification sheets is not described in detail belongs to the known prior art of professional and technical personnel in the field.
Claims (10)
1. a working method for spring steel bow band, is characterized in that, it comprises the steps:
Step 1: molten steel is lowered in existing spring steel bow band mould to cooling rear formation spring steel bow band blank;
Step 2: stamp out bow with punch press on spring steel bow band blank and be with central channel (1), then beat Go-over mould open holes (2) with drilling machine on spring steel bow band blank, then spring steel bow band blank is carried out to chamfering deburring processing;
Step 3: be with the anti-decarburizing coating of blank surface-coated through step 2 spring steel bow after treatment, then pack the spring steel bow band blank that has applied anti-decarburizing coating into heat treatment tooling (3) fixing, and the spring steel bow band blank that has applied anti-decarburizing coating is heated to 840 DEG C～870 DEG C, and be incubated 30～40min, then in the quenching oil of 75～85 DEG C, the described spring steel bow that has applied anti-decarburizing coating is with to blank quench cooled 4～6 minutes;
Step 4: the spring steel bow band blank through quench cooled processing is carried out to temper, and the tempering temperature in temper process is 420～440 DEG C, and the soaking time in temper process is 60～90 minutes;
Step 5: the spring steel bow band blank through temper is carried out to nitric acid salt bath cooling process;
Step 6: the spring steel bow band blank end face (4) and bottom surface (5) after nitric acid salt bath cooling process is polished by grinding machine, and by grinding machine, the spring steel bow band blank two ends after nitric acid salt bath cooling process are polished to chamfering (6), form spring steel bow band finished product.
2. the working method of spring steel bow band according to claim 1, is characterized in that: the molten steel in described step 1 is 60Si2Mn molten steel.
3. the working method of spring steel bow band according to claim 1, is characterized in that: described quenching oil is made up of the machine oil of weight percent content 60～65% and the heavy oil of weight percent content 35～40%.
4. the working method of spring steel bow band according to claim 1, is characterized in that: in described step 5, the temperature of described nitric acid salt bath is 165～175 DEG C.
5. the working method of spring steel bow band according to claim 1, is characterized in that: in described step 5, the spring steel bow band blank after nitric acid salt bath cooling process is cleaned and dries up processing.
6. the working method of spring steel bow band according to claim 1, is characterized in that: in described step 5, after the spring steel bow band blank of temper carries out nitric acid salt bath cooling process, making spring steel bow band blank hardness is Rockwell hardness 40～45.
7. the working method of spring steel according to claim 1 bow band, is characterized in that: in described step 6, grinding machine is polished into surfaceness by spring steel bow band blank end face and bottom surface and is below Ra0.8.
8. the working method of spring steel bow band according to claim 1, is characterized in that: in described step 6, grinding machine is polished into 10 ° by spring steel bow with the chamfering at blank two ends.
9. spring steel according to claim 1 bends the working method of band, it is characterized in that: after described step 6, also comprise step 7, spring steel bow band finished product is carried out to hardness detection and metallographic detection.
10. the working method of spring steel bow band according to claim 1, is characterized in that: in described step 5, nitric acid salt bath comprises NaNO
2and KNO
2, wherein, NaNO
2quality and KNO
2the ratio of quality be 1 to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410157284.5A CN103952525B (en) | 2014-04-18 | 2014-04-18 | The working method of spring steel bow band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410157284.5A CN103952525B (en) | 2014-04-18 | 2014-04-18 | The working method of spring steel bow band |
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| Publication Number | Publication Date |
|---|---|
| CN103952525A true CN103952525A (en) | 2014-07-30 |
| CN103952525B CN103952525B (en) | 2016-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410157284.5A Active CN103952525B (en) | 2014-04-18 | 2014-04-18 | The working method of spring steel bow band |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107541590A (en) * | 2017-10-27 | 2018-01-05 | 北京卡特刘科技有限公司 | A kind of heat treatment method for alloy spring steel |
| CN114273865A (en) * | 2021-12-30 | 2022-04-05 | 北京智思迪科技有限公司 | Large-range high-compatibility finger-shaped sheet of agricultural radial tire forming machine and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059375A (en) * | 1990-08-30 | 1992-03-11 | 天津大学 | The hot-work die highly malleablized is handled |
| JP2002361348A (en) * | 2001-06-11 | 2002-12-17 | Topy Ind Ltd | Manufacturing method for catapillar strip link |
| CN102676782A (en) * | 2012-05-08 | 2012-09-19 | 无锡宏达热处理锻造有限公司 | Thermal treatment process of copper tube perforation needle |
| CN102943271A (en) * | 2012-12-07 | 2013-02-27 | 沈阳洪达信息科技有限公司 | Heating processing technology of gantry crane bridge frame |
-
2014
- 2014-04-18 CN CN201410157284.5A patent/CN103952525B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059375A (en) * | 1990-08-30 | 1992-03-11 | 天津大学 | The hot-work die highly malleablized is handled |
| JP2002361348A (en) * | 2001-06-11 | 2002-12-17 | Topy Ind Ltd | Manufacturing method for catapillar strip link |
| CN102676782A (en) * | 2012-05-08 | 2012-09-19 | 无锡宏达热处理锻造有限公司 | Thermal treatment process of copper tube perforation needle |
| CN102943271A (en) * | 2012-12-07 | 2013-02-27 | 沈阳洪达信息科技有限公司 | Heating processing technology of gantry crane bridge frame |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107541590A (en) * | 2017-10-27 | 2018-01-05 | 北京卡特刘科技有限公司 | A kind of heat treatment method for alloy spring steel |
| CN114273865A (en) * | 2021-12-30 | 2022-04-05 | 北京智思迪科技有限公司 | Large-range high-compatibility finger-shaped sheet of agricultural radial tire forming machine and preparation method thereof |
| CN114273865B (en) * | 2021-12-30 | 2022-10-14 | 天津赛象科技股份有限公司 | Preparation method of large-range high-compatibility finger-shaped sheet of agricultural radial tire forming machine |
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|---|---|
| CN103952525B (en) | 2016-02-03 |
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