CN101381799A - Surface hardening treatment method for pin shaft of plastic forming machine - Google Patents
Surface hardening treatment method for pin shaft of plastic forming machine Download PDFInfo
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- CN101381799A CN101381799A CNA2008101212469A CN200810121246A CN101381799A CN 101381799 A CN101381799 A CN 101381799A CN A2008101212469 A CNA2008101212469 A CN A2008101212469A CN 200810121246 A CN200810121246 A CN 200810121246A CN 101381799 A CN101381799 A CN 101381799A
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- laser
- pin shaft
- bearing pin
- pin surface
- forming machine
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000011282 treatment Methods 0.000 title claims abstract description 22
- 239000004033 plastic Substances 0.000 title claims description 12
- 229920003023 plastic Polymers 0.000 title claims description 12
- 238000013532 laser treatment Methods 0.000 claims abstract description 18
- 238000010791 quenching Methods 0.000 claims abstract description 6
- 230000000171 quenching effect Effects 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 3
- 239000010959 steel Substances 0.000 claims abstract description 3
- 230000009466 transformation Effects 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 101100434846 Caenorhabditis elegans lap-1 gene Proteins 0.000 claims description 3
- 101100216020 Mus musculus Anpep gene Proteins 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000010137 moulding (plastic) Methods 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 3
- 230000001050 lubricating effect Effects 0.000 abstract 1
- 239000003973 paint Substances 0.000 abstract 1
- 238000001746 injection moulding Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005121 nitriding Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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Abstract
The invention provides a surface hardening treatment method for a pin shaft of a plastic molding machine, which comprises the following steps: the pin shaft is made of 40Cr or 45 steel, the surface of the pin shaft is cleaned and coated with laser quenching paint, then the surface of the pin shaft is subjected to laser treatment, and the surface of the pin shaft is provided with a spiral laser treatment belt with a hardening belt and a softening belt which are separated from each other by adjusting the overlapping amount of the laser treatment. The invention utilizes laser to carry out hardening treatment on the surface of the pin shaft, has low cost and simple operation, and the obtained pin shaft has the oil storage function, good lubricating property and long service life.
Description
(1) technical field
The present invention relates to a kind of pin surface-hardening treatment method of plastics forming machine, particularly a kind of surface obtains the plastic molding press bearing pin that surface hardening is handled through the method for the plastic molding press bearing pin of laser reinforcing processing by this method.
(2) background technology
Pitman pin is the vital part of plastic-injection moulding machine large usage quantity, bearing complicated shearing, squeeze and friction wear in the work, for adapting to this operating mode, pitman pin is made by 38CrMoAl usually, imposes to reach 60 to 70 hours nitriding treatment again.Yet in use, nitride layer is thin and be easy to come off, and nitriding treatment consumed a large amount of energy, causes the cost of product higher and quality is not good enough, and the market competitiveness is not strong.
(3) summary of the invention
The object of the invention provides a kind of pin surface-hardening treatment method of plastics forming machine, and the cost that is obtained by this method hardening treatment is low, the plastic molding press bearing pin of long service life.
The technical solution used in the present invention is:
A kind of pin surface-hardening treatment method of plastics forming machine, described method comprises: described bearing pin is 40Cr or 45 steel matter, earlier on bearing pin surface that clean is crossed, apply laser quenching coating, again laser treatment is carried out on the bearing pin surface, by regulating the amount of lap of laser treatment, make the bearing pin surface have hardenability band and zone of transformation is alternate and the laser treatment band of type in the shape of a spiral.
Described laser processing technique parameter is: laser scanning speed 350～400mm/min, rectangular light spot are of a size of (10～15) * 3mm
2, energy density 48～52J/cm
2, amount of lap 1～2mm.In the multiple tracks scanning of laser, owing to there is overlap joint (overlapping) position of certain limit between scanning of preceding road and the scanning of road, back, cause this position to produce a temper softening band, this regional hardness ratio hardenability band is low, recoverable deformation takes place easily, and amount of lap is that 1mm is meant that overlap joint (overlapping) bandwidth is 1mm.By above-mentioned laser treatment, be the hardened layer that 0.3～1mm, hardness are not less than HRC55 thereby obtain a degree of depth on the bearing pin surface, the production cost of bearing pin is reduced.Can save nearly ten thousand yuan of expenses as six certain plastic injection moulding machine long connecting rod bearing pins handling through laser reinforcing, and performance improves significantly, through user feedback, this bearing pin brings into operation in June, 2004, and working condition is good so far.
Concrete, described hardening process comprises the steps:
(1) bearing pin is through modifier treatment, and being ground to roughness is that the cleaning bearing pin needs the treatment zone surface;
(2) surface after cleaning evenly applies laser quenching coating, and described coating is the general laser quenching coating in market;
(3) according to the bearing pin working condition, setting laser reinforcing process parameter: sweep velocity is 350～400mm/min, and spot size is (10～15) * 3mm
2, energy density is 48～52J/cm
2, amount of lap is 1mm; Select the laser beam of relevant parameter that bearing pin is carried out laser treatment;
(4) after the laser treatment, bearing pin is ground to the size of drawing regulation, the outer round surface roughness reaches and can install again.
Pin surface-hardening treatment method of plastics forming machine of the present invention, described surface hardening band is (10～30) with the ratio of zone of transformation width: 1, described hardenability band hardness is HRC50～HRC60, width 8～14mm, the degree of depth 0.3～1.0mm, and described zone of transformation hardness is HRC40～HRC50 (than about low 10 units of hardenability band).
Described hardenability band and zone of transformation obtain by the amount of lap of regulating laser treatment, and the laser processing technique parameter is: laser scanning speed 350～400mm/min, rectangular light spot are of a size of (10～15) * 3mm
2, energy density 48～52J/cm
2, amount of lap 1～2mm.
The hardenability band of bearing pin after laser treatment is 10～15mm, and line style in the shape of a spiral, the ratio of control hardenability band and zone of transformation width is (10～30): 1, the Rockwell hardness of zone of transformation is than low 10 units in other position, non-overlapping place hardness is higher, and lap-joint's wearing and tearing earlier in the course of the work form small oil reservoir, can play good anti-attrition and lubrication, this is most crucial work-ing life to prolonging bearing pin.And this oil storage function to be bearing pin tradition nitriding process can't realize.
Beneficial effect of the present invention is mainly reflected in: utilize laser that hardening treatment is carried out on the bearing pin surface, cost is low, simple to operate, obtains bearing pin and has the oil storage function, and lubricity is good, long service life.
(4) description of drawings
Fig. 1 handles synoptic diagram for pin surface-hardening of the present invention; Wherein, 1-laser irradiation direction, 2-laser scanning direction of motion, 3-bearing pin sense of rotation, 4-treatment zones, 5-spot width, 6-lap belt (soft band), 7-pending zone, 8-hardenability band.
(5) embodiment
The present invention is described further below in conjunction with specific embodiment.
Embodiment 1:
With reference to accompanying drawing 1, handled is the bearing pin of FT1250 plastic-injection moulding machine, and material is 40Cr, and HB265 is arrived in first modifier treatment, is machined to surfaceness and is
(roughness that expression obtains with the method for removing material, the Ra higher limit is 3.2 μ m).Adopting laser apparatus is 7kW GFT-IVB type multifunction laser system of processing (Futong Laser Engineering Technology Inst., Shanghai), and before the laser treatment, the customization anchor clamps also pre-determine processing area and amount of lap; Need the concrete size of into treatment sites to carry out numerical control programming according to bearing pin then; Clean pending zone, bearing pin surface, apply laser quenching coating.According to the bearing pin working condition, the setting laser sweep velocity is 350mm/min, and spot size is 15 * 3mm
2, energy density is 49J/cm
2, amount of lap is 1mm, and laser treatment is carried out on the bearing pin surface.
The laser apparatus numerical control programming is as follows:
N0005G 64
N0010?M3
N0015?M1＝3?S1＝18?G91?G01?Z6000?F25.2?M08
N0020?G09?G05
N0025?G91?G01?Z-6000?F2000
N0030?M30
The hardenability band width of bearing pin after laser treatment is about 14.5mm, and line style in the shape of a spiral, and the Ren Wudian on hardenability band surface is carried out hardness test, and its hardness is respectively HRC56, and 55,58,62,57, hardened-depth is 0.6mm.Ren Wudian to lap belt (be zone of transformation, width is about 0.5mm) surface carries out hardness test, and its hardness is respectively HRC45, and 42,50,46,43.The ratio of hardenability band and zone of transformation width is 29:1, the hardness of zone of transformation than the low HRC10 in other position about.Detect the average little prominent 1 μ m of hardenability band after the external grinding.
After the laser treatment, again bearing pin is ground to the outer round surface roughness and reaches
(roughness that expression obtains with the method for removing material, the Ra higher limit is 0.4 μ m), the installation operation.Through user feedback, the bearing pin operational excellence after laser hardening is handled.
Claims (5)
1. pin surface-hardening treatment method of plastics forming machine, it is characterized in that described bearing pin is 40Cr or 45 steel matter, described method comprises: at bearing pin surface, the coating laser quenching coating that clean is crossed, again laser treatment is carried out on the bearing pin surface, by regulating the amount of lap of laser treatment, make the bearing pin surface have hardenability band and zone of transformation is alternate and the laser treatment band of type in the shape of a spiral.
2. pin surface-hardening treatment method of plastics forming machine as claimed in claim 1, it is characterized in that the laser processing technique parameter is: laser scanning speed 350～400mm/min, rectangular light spot are of a size of (10～15) * 3mm
2, energy density 48～52J/cm
2, amount of lap 1～2mm.
3. pin surface-hardening treatment method of plastics forming machine as claimed in claim 1 is characterized in that the described described hardenability band and the ratio of zone of transformation width are (10～30): 1.
4. pin surface-hardening treatment method of plastics forming machine as claimed in claim 1 is characterized in that described hardenability band hardness is HRC50～HRC60, width 10～15mm, the degree of depth 0.3～1.0mm, and described zone of transformation hardness is HRC40～HRC50.
5. pin surface-hardening treatment method of plastics forming machine as claimed in claim 1 is characterized in that described clean is water cleaning bearing pin surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101212469A CN101381799A (en) | 2008-09-25 | 2008-09-25 | Surface hardening treatment method for pin shaft of plastic forming machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101212469A CN101381799A (en) | 2008-09-25 | 2008-09-25 | Surface hardening treatment method for pin shaft of plastic forming machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101381799A true CN101381799A (en) | 2009-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101212469A Pending CN101381799A (en) | 2008-09-25 | 2008-09-25 | Surface hardening treatment method for pin shaft of plastic forming machine |
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| CN (1) | CN101381799A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101974676A (en) * | 2010-11-09 | 2011-02-16 | 诸城市义和车桥有限公司 | Breaking-preventing knuckle spindle and thermal treatment method thereof |
| CN102560078A (en) * | 2010-12-24 | 2012-07-11 | 北京有色金属研究总院 | Steel and iron material surface nanometering method |
| CN103388056A (en) * | 2013-07-18 | 2013-11-13 | 江苏和昊激光科技有限公司 | Method for improving performances of outer cylinder wall of cylindrical pressure vessel by high-energy laser |
| CN104651570A (en) * | 2015-01-30 | 2015-05-27 | 柳州市俊杰汽配制造有限公司 | Hardening process of automobile transmission shaft |
| CN105666035A (en) * | 2016-03-08 | 2016-06-15 | 山东朝文能源装备有限公司 | Ultrasonic machining method for sucker rod and application thereof |
| CN107201427A (en) * | 2017-05-05 | 2017-09-26 | 吉林大学 | Laser transformation strengthening method and the bionical camshaft that hard phase is prepared using this method |
| CN108220575A (en) * | 2017-12-30 | 2018-06-29 | 中钢集团邢台机械轧辊有限公司 | A kind of laser reinforcing process of shaft-like workpiece |
| CN113528760A (en) * | 2020-09-18 | 2021-10-22 | 上海炬辰激光技术有限公司 | Laser quenching hardening treatment process for shaft hub of reed damper |
| CN114525381A (en) * | 2021-11-19 | 2022-05-24 | 国网新疆电力有限公司电力科学研究院 | Laser patterning local heat treatment method and hardware treated by same |
-
2008
- 2008-09-25 CN CNA2008101212469A patent/CN101381799A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101974676A (en) * | 2010-11-09 | 2011-02-16 | 诸城市义和车桥有限公司 | Breaking-preventing knuckle spindle and thermal treatment method thereof |
| CN101974676B (en) * | 2010-11-09 | 2015-02-25 | 诸城市义和车桥有限公司 | Breaking-preventing knuckle spindle and thermal treatment method thereof |
| CN102560078A (en) * | 2010-12-24 | 2012-07-11 | 北京有色金属研究总院 | Steel and iron material surface nanometering method |
| CN103388056A (en) * | 2013-07-18 | 2013-11-13 | 江苏和昊激光科技有限公司 | Method for improving performances of outer cylinder wall of cylindrical pressure vessel by high-energy laser |
| CN104651570A (en) * | 2015-01-30 | 2015-05-27 | 柳州市俊杰汽配制造有限公司 | Hardening process of automobile transmission shaft |
| CN105666035A (en) * | 2016-03-08 | 2016-06-15 | 山东朝文能源装备有限公司 | Ultrasonic machining method for sucker rod and application thereof |
| CN107201427A (en) * | 2017-05-05 | 2017-09-26 | 吉林大学 | Laser transformation strengthening method and the bionical camshaft that hard phase is prepared using this method |
| CN108220575A (en) * | 2017-12-30 | 2018-06-29 | 中钢集团邢台机械轧辊有限公司 | A kind of laser reinforcing process of shaft-like workpiece |
| CN113528760A (en) * | 2020-09-18 | 2021-10-22 | 上海炬辰激光技术有限公司 | Laser quenching hardening treatment process for shaft hub of reed damper |
| CN114525381A (en) * | 2021-11-19 | 2022-05-24 | 国网新疆电力有限公司电力科学研究院 | Laser patterning local heat treatment method and hardware treated by same |
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Open date: 20090311 |