CN102500824A - Method for repairing circular saw web of flying sawing machine - Google Patents
Method for repairing circular saw web of flying sawing machine Download PDFInfo
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- CN102500824A CN102500824A CN2011103480721A CN201110348072A CN102500824A CN 102500824 A CN102500824 A CN 102500824A CN 2011103480721 A CN2011103480721 A CN 2011103480721A CN 201110348072 A CN201110348072 A CN 201110348072A CN 102500824 A CN102500824 A CN 102500824A
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Abstract
The invention relates to a method for repairing a circular saw web of a flying sawing machine. The method sequentially comprises the following technical processes of shaping the saw web, repairing broken teeth, shaping the tooth shape of a tooth grinding machine, quenching at high frequency and tempering at low temperature, so that the shortcoming of pure mechanical repairing of the tooth grinding machine is overcome; and saw teeth of the saw web have the original performance, and the service life of the saw web is not shortened; theoretically, the saw web can be repaired for over hundred times; the cutting area is reduced by about 0.1 to 0.5 percent every time when the saw web is repaired; therefore, the cost of the saw web during production of cold-formed sectional steel is reduced greatly; and the production cost is reduced.
Description
Technical field
The present invention relates to a kind of flying saw saw blade restorative procedure.
Background technology
Cold-rolled forming section is a kind of economic section section bar, and it has that section is even, product quality is high, energy resource consumption is low and many advantages such as economic benefit height.At present, cold-rolled forming section is produced the flying saw that is widely used in the unit as standard scale equipment, and promptly flying saw is used for after the production formed product according to customer requirement sawing and becomes the shaped steel of certain-length size.As the main easily-consumed products of flying saw, damages such as sawtooth wearing and tearing, fracture, saw blade distortion can appear in the saw blade of flying saw after sawing a period of time, cause and can't use.In order to practice thrift cost, people begin one's study and make saw blade continue the method for using, the i.e. restorative procedure of saw blade.At present the clod wash industry generally adopts gear grinding machines machine finish sawtooth method, and the sawtooth that damages through gear grinding machines machine finish is to reach reusable purpose.Yet simple gear grinding machines mechanical prosthesis is not eliminated the annealing phenomenon that saw blade produces in sawing process continuously, make saw life reduce on the contrary, all can't reach the last sawing life-span after each the reparation, then until scrapping after several times repeatedly.Simultaneously, the method can only significantly improve production cost by scrapping processing for then repairing damaging bigger saw blade.
Summary of the invention
Technical problem to be solved of the present invention is: overcome the shortcoming of simple gear grinding machines mechanical prosthesis, provide a kind of saw blade sawtooth that can make to reach the saw blade restorative procedure that original performance, service life do not reduce.
For achieving the above object, the present invention adopts in proper order: the process technology scheme of saw blade shaping, broken teeth reparation-gear grinding machines profile modification-high-frequency quenching-lonneal.
1, saw blade shaping, broken teeth reparation
The saw blade shaping: saw blade is placed on the platform proofreaies and correct, one Monday Zhou Jiaozheng, inseparable block correction, the saw blade after the correction meet standard " metallurgical with metal cold cut saw blade ", carry out grinding then.
Broken teeth is repaired: select for use equal material material to the broken teeth repair welding, because heating region is narrow, need select CO for use
2Gas shielded arc welding, the little electric current welding of 180A～200A.
Two dynamically grindings are adopted in the grinding of saw blade broken teeth, and grinding head grinding wheel and workpiece saw blade move simultaneously, so will stop feed at the correct grinding position, are ground to grinding sparks and reduce naturally, reach the purpose of dwindling tooth and profile of tooth position tolerance.
2, gear grinding machines profile modification
Utilize gear grinding machines that the saw blade of shaping and broken teeth reparation is carried out profile modification.
Saw blade after the profile modification requires:
(1) the concavo-convex flexibility of saw blade original sheet is less than 3 mm, and end face flatness run-out tolerance does not surpass 0.3 mm;
(2) sawtooth be engaged on normal tolerance range (± 1mm), smooth, closely non-loosening is distortionless;
(3) primary cutting angles, pair cutting angle, not slight blackout.
(4) the sawtooth both sides do not have moire.
3, high-frequency quenching
Saw blade after the finishing is quenched through sawtooth annealing device (high-frequency quenching), need rationally adjustment quenching current strength (580 A～1060 A) and cool time (20～45 min) during quenching.The heated degree of depth of crown reaches and must ask, and presents orange colour, and the depth of quenching on the saw blade thickness direction is consistent as far as possible, avoids quenching partially.According to the above heat treatment parameter of the adjustment of the hardness after the heat treatment, in the hope of reaching best quenching effect.Will prevent to produce cutting edge scaling loss and long-pending knurl in the quenching process, the long-pending knurl in the part of flank of tooth flank is used angle grinding machine equating, can not damage original shape, to detecting underproof tooth, need mend and quench, until qualified.Different according to the saw blade diameter, adjustment current strength and cool time.
4, lonneal
Sawtooth hardness after the quenching is high, but very crisp, needs lonneal just can reach final application target.The purpose of lonneal is to improve the comprehensive mechanical property of saw blade; Temperature is decided according to the material of saw blade, cools off with stove after the insulation regular hour in the temperature of setting, and carries out Hardness Surveillance after coming out of the stove; Temper number is in HRC53～63 scopes, and test point is best apart from crown 2～3 mm places.The crown cutting edge should keep sharp intact, obvious knurl, the scaling loss amassed of nothing, and the depth of quenching should reach to tooth depth about 1/4～1/3 simultaneously.
The invention has the beneficial effects as follows: the restorative procedure of saw blade provided by the invention can make the saw blade of damages such as sawtooth wearing and tearing, fracture, saw blade distortion reach the serviceability and the life-span of former saw blade; Can repair more than hundred times in theory; The each reparation reduced cutting area about 0.1%～0.5%; Thereby greatly reduce the saw blade spending in the cold-rolled forming section production process, reduce production costs.
The specific embodiment
The renovation technique that material is 65Mn, cut off after annular saw that the area size reaches 700 * 360 * 14 (long * wide * thick) damages after the cutting maximum intensity reaches 550 Mpa cold-rolled forming sections is following:
1. saw blade is placed on and proofreaies and correct shaping on the platform, to the not serious saw blade that distorts, regularly one Monday Zhou Jiaozheng, inseparable block correction is beaten to beat and is firmly wanted evenly rhythm arranged; To the serious saw blade that distorts, then need utilize planisher to proofread and correct.For broken teeth, adopt carbon dioxide gas to protect weldering, (180A～200A) Welding Repair is carried out in welding to little electric current.
2. utilize MJD-H A4 type gear grinding machines sawtooth to be carried out machine finish, tooth pitch 20mm, tooth depth 10mm, power 1.1KW.
3. adopt the hardening apparatus by high frequency current of design voluntarily to carry out sawtooth heat treatment, current strength 580 A～1060 A, cool time 20～45min.
4. the saw blade after quenching carries out lonneal at 180 ℃～200 ℃ insulation 30～60min, and its hardness has arrived more than the HRC55.
Through the saw blade that above method is repaired, saw blade sawtooth has all reached original performance, and do not reduce even increase service life.
Claims (5)
1. flying saw saw blade restorative procedure is characterized in that: in repair process used in order saw blade shaping, broken teeth reparation, gear grinding machines profile modification, high-frequency quenching, lonneal technical process.
2. flying saw saw blade restorative procedure according to claim 1 is characterized in that: during the saw blade shaping with saw blade be placed on the platform one Monday Zhou Jiaozheng, inseparable block correction.
3. flying saw saw blade restorative procedure according to claim 1 is characterized in that: select for use equal material material to the broken teeth repair welding when broken teeth is repaired, select the carbon dioxide weldering for use, the little electric current welding of 180A-200A.
4. flying saw saw blade restorative procedure according to claim 1 is characterized in that: use 580 A-1060 A current strength during high-frequency quenching, and quenching 20-45 second, the depth of quenching of the 1/4-1/3 of tooth depth,
Be quenched to crown and present orange colour.
5. flying saw saw blade restorative procedure according to claim 1 is characterized in that: set 150 ℃-250 ℃ annealing temperature during lonneal, temperature retention time 30-60 cooled off with stove after second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103480721A CN102500824A (en) | 2011-11-07 | 2011-11-07 | Method for repairing circular saw web of flying sawing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103480721A CN102500824A (en) | 2011-11-07 | 2011-11-07 | Method for repairing circular saw web of flying sawing machine |
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| Publication Number | Publication Date |
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| CN102500824A true CN102500824A (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103480721A Pending CN102500824A (en) | 2011-11-07 | 2011-11-07 | Method for repairing circular saw web of flying sawing machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201600089555A1 (en) * | 2016-09-05 | 2018-03-05 | Moreschi Srl | PROCEDURE FOR THE REGENERATION OF DISPOSABLE CIRCULAR BLADES |
| CN111136423A (en) * | 2019-12-25 | 2020-05-12 | 刘瑞平 | Method for trimming abrasion of arch-shaped tooth plate and tooth |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US705720A (en) * | 1901-11-08 | 1902-07-29 | Alvah J Carson | Machine for repairing saws. |
| CA253844A (en) * | 1925-09-22 | J. W. Lougheed Overend | Method of repairing saws | |
| CN1278014A (en) * | 2000-07-08 | 2000-12-27 | 赵长铭 | Heat treatment process for superthin large circular shape medium-high carbon steel workpiece |
| US7007686B1 (en) * | 2004-02-17 | 2006-03-07 | Zuzelo Edward A | Repair assembly for a worn skid plate of a circular saw |
| CN101053915A (en) * | 2007-05-22 | 2007-10-17 | 马鞍山市威龙科工贸有限公司 | Repairing reproduction method for saw bit for metallurgy |
| CN201783707U (en) * | 2010-09-07 | 2011-04-06 | 宁帮强 | Double metal band saw blade capable of being repeatedly repaired and used |
-
2011
- 2011-11-07 CN CN2011103480721A patent/CN102500824A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA253844A (en) * | 1925-09-22 | J. W. Lougheed Overend | Method of repairing saws | |
| US705720A (en) * | 1901-11-08 | 1902-07-29 | Alvah J Carson | Machine for repairing saws. |
| CN1278014A (en) * | 2000-07-08 | 2000-12-27 | 赵长铭 | Heat treatment process for superthin large circular shape medium-high carbon steel workpiece |
| US7007686B1 (en) * | 2004-02-17 | 2006-03-07 | Zuzelo Edward A | Repair assembly for a worn skid plate of a circular saw |
| CN101053915A (en) * | 2007-05-22 | 2007-10-17 | 马鞍山市威龙科工贸有限公司 | Repairing reproduction method for saw bit for metallurgy |
| CN201783707U (en) * | 2010-09-07 | 2011-04-06 | 宁帮强 | Double metal band saw blade capable of being repeatedly repaired and used |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201600089555A1 (en) * | 2016-09-05 | 2018-03-05 | Moreschi Srl | PROCEDURE FOR THE REGENERATION OF DISPOSABLE CIRCULAR BLADES |
| CN111136423A (en) * | 2019-12-25 | 2020-05-12 | 刘瑞平 | Method for trimming abrasion of arch-shaped tooth plate and tooth |
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Application publication date: 20120620 |