CN103600124A - Frame saw blade manufacturing method - Google Patents
Frame saw blade manufacturing method Download PDFInfo
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- CN103600124A CN103600124A CN201310560896.4A CN201310560896A CN103600124A CN 103600124 A CN103600124 A CN 103600124A CN 201310560896 A CN201310560896 A CN 201310560896A CN 103600124 A CN103600124 A CN 103600124A
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- saw blade
- steel band
- frame saw
- manufacture method
- grinding
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 77
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 49
- 239000010959 steel Substances 0.000 claims abstract description 49
- 238000000227 grinding Methods 0.000 claims abstract description 29
- 238000003466 welding Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 238000005496 tempering Methods 0.000 claims description 25
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 22
- 229910052759 nickel Inorganic materials 0.000 claims description 11
- 238000007747 plating Methods 0.000 claims description 8
- 238000010791 quenching Methods 0.000 claims description 8
- 230000036346 tooth eruption Effects 0.000 claims description 8
- 229910001651 emery Inorganic materials 0.000 claims description 7
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 4
- 238000010792 warming Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 2
- 210000003781 tooth socket Anatomy 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 229910001347 Stellite Inorganic materials 0.000 description 4
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000011417 postcuring Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to a frame saw, and discloses a frame saw blade manufacturing method. The method includes 1, tooth material 2 is M51 material, cutting the M51 material into cylindrical particles with the diameter of 2.0 to 3.0mm and the thickness of 1.6 to 2.0mm, performing heat treatment on the M51 material and a steel band; 2, performing tooth socket line cutting on the steel band; 3, welding the M51 material to the steel band in a manner of separated resistance welding for 0.0001 to 0.1s to obtain a frame saw blade; 4, grinding the tooth material 2 into zigzag shape. By the aid of the method, tooth material cost is reduced, the tooth material is processed conveniently, and usage is saved; grinding efficiency is high, grinding amount is low, and grinding is easy; impact resistance and wear resistance are both considered.
Description
Technical field
The present invention relates to buck saw, related in particular to a kind of manufacture method of frame saw blade.
Background technology
The manufacture of buck saw has two kinds in the world at present, a kind of is to using the buck saw of stellite as tooth material, its principle is that stellite is made to welding wire, melted again heap and be welded in the crown position with the buck saw backing of teeth groove, tooth material glomeration heap after fusing, forms crown to the tooth material of spherical heap by grinding; Another kind is to using carbide alloy as the buck saw of tooth material, and its principle is that hard-metal insert material is processed into given shape particle, then by its soldering on the buck saw backing with teeth groove and crown welding breach.There is scrambling in the built-up welding of stellite buck saw, larger at the stock removal that tooth ball milling is become crown need, working (machining) efficiency is low, and waste of material is serious.Carbide alloy buck saw, carbide alloy crown particle processing cost is high, and crown weld strength is not high, and crown impact resistance is poor, grinding difficulty.
Summary of the invention
The stock removal that the present invention is directed to stellite buck saw in prior art is larger, and working (machining) efficiency is low, and waste of material is serious, and the processing cost of carbide alloy buck saw is high, crown weld strength is not high, and crown impact resistance is poor, the shortcoming of grinding difficulty, a kind of tooth material cost that reduced is provided, easy to process, materials are saved, and grinding efficiency is high, few and the easy grinding of stock removal, takes into account the manufacture method of the frame saw blade of crown impact resistance and wearability.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
The manufacture method of frame saw blade, comprises the following steps,
Step 1: tooth material is M51 material, after M51 material is cut into diameter and is 2.0～3.0mm, the thickness cylinder particle that is 1.6～2.0mm, heat-treats M51 material, and steel band is heat-treated;
Step 2: steel band is carried out to the cutting of teeth groove line;
Step 3: M51 material is welded on steel band, is frame saw blade after welding; Welding manner adopts separate form electric resistance welding, and be 0.0001～0.1s weld interval;
Step 4: the tooth material on steel band is ground to zigzag.
As preferably, M51 material heat-treat front first by the M51 material that cuts into cylinder particle by its surperficial greasy dirt of Ultrasonic Cleaning, heat treatment step comprises that to put into temperature be to quench in the vacuum drying oven of 1185～1200 ℃ by cleaning M51 material after greasy dirt, cool time is 10～30min, after quenching, immersed temperature and be in the liquid nitrogen of-230～-190 ℃ and carried out subzero treatment, the pressure of its cooler environment is 8～9bar, be incubated after 1～2 hour relief M51 material is warming up to 20～30 ℃ naturally and carry out tempering, temperature is between 500～600 ℃, tempering time is 1～2h, then be cooled to 20～30 ℃, tempering step is to complete for 2 to 3 times, the HRC of the last moulding of tooth material is 68～70.Subzero treatment is that the object of tempering is the post-curing for tooth material in order to improve the wearability of tooth material.
As preferably, the M51 material after heat treatment is carried out to plating nickel on surface processing, the thickness of nickel is 10～20um.Nickel plating can improve the welding performance of M51 material and steel band, and it comprises welding uniformity, weld strength etc.
As preferably, the heat treatment of steel band is that the steel band after cleaning greasy dirt is put into hardening heat is that 800～900 ℃, the middle tempering furnace that is 400～600 ℃ for oil cooling, temperature quench respectively and tempering, and the HRC of last moulding is 48～50.
As preferably, in steel band heat treatment step, the tape running speed of steel band in tempering furnace is 1～3 meter per minute.
As preferably, it is steel band to be cut into the length of 450-550mm that steel band is carried out to the cutting of teeth groove line, then the steel band of 40-50 root equal length is stacked and by clamp, is placed on wire cutting machine tool and cuts teeth groove afterwards, and the spacing of each crown is unequal.Improve cutting efficiency and homogeneity of product.The spacing of each crown is unequal is to produce resonance when eliminating sawing, reduces noise.
As preferably, the welding in step 3 is that the M51 material carrying out after plating nickel on surface processing is welded on the steel band carrying out after the cutting of teeth groove line.
As preferably, the grinding in step 4 is to utilize Carborundum wheel or CBN emery wheel to carry out grinding to the tooth material on frame saw blade, and grinding face comprises rake face, rear knife face, side knife surface and relief angle fillet surface.On frame saw blade, have the sawtooth of two types, a kind of sawtooth is provided with rake face, rear knife face, side knife surface and relief angle fillet surface, and another kind of sawtooth is provided with rake face, rear knife face and side knife surface, and two kinds of sawtooth cross welds are on steel band.There is the sawtooth tooth depth of relief angle fillet surface than the high 0.1～0.25mm of sawtooth tooth depth that there is no relief angle fillet surface, play sawing guide effect.Carborundum wheel is not easy to wear, and need not compensate, and CBN emery wheel is easy to wear needs compensation.
As preferably, also comprise step 5: frame saw blade is carried out to school curved; Grinding face on frame saw blade is that frame saw blade is anterior, running roller is carried out in frame saw blade rear portion and roll.Its objective is frame saw blade is completed while being tightened up at clamping, the position near grinding face on frame saw blade is first tightened up, thereby can prevent run; Otherwise, if frame saw blade rear portion is first tightened up, easily there is run.
In the present invention, because the height of the cylinder particle of M51 material cutting is all less, so general designation is highly thickness.
The present invention, owing to having adopted above technical scheme, has significant technique effect:
1. reduced tooth material cost, it is easy to process, and materials are saved;
2. grinding efficiency is high, the few and easy grinding of stock removal;
3. take into account crown impact resistance and wearability.
Specific as follows: adopt M51 material substitution part tooth material, M51 material cost is lower, has reduced its processing cost; Before using, M51 material being cut into diameter is the cylinder particle that 2.0～3.0mm, thickness are 1.6～2.0mm, is worn into the needed stock removal of crown relatively low, has improved working (machining) efficiency, and can save more tooth material; Subzero treatment is in order to improve wearability, and the object of tempering is the post-curing for tooth material; Nickel plating can improve the welding performance of M51 material and steel band, and it comprises welding uniformity, weld strength etc.; M51 material impact-resistant is strong, and cracked tooth material is discharged saw kerf by the sawtooth made by M51 material, has stoped single, band saw to collapse scrapping that tooth causes, and has strengthened band saw to being cut the adaptability of material.
Accompanying drawing explanation
Fig. 1 is fabrication processing figure of the present invention.
Fig. 2 is the front view of frame saw blade.
Fig. 3 is the I portion enlarged drawing of Fig. 2.
Fig. 4 is the A-A profile of Fig. 2.
Fig. 5 is the B-B profile of Fig. 2.
The toponym that in accompanying drawing, each number designation refers to is as follows: wherein 1-steel band, 2-tooth material, 3-rake face, 4-rear knife face, 5-side knife surface, 6-relief angle fillet surface, 7-positive cutter is curved.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Embodiment 1
The manufacture method of frame saw blade, as shown in Figures 1 to 5, comprises the following steps,
Step 1: select M51 material as tooth material 2, M51 material is heat-treated, concrete operations are as follows:
It is the cylinder particle that 2.0～3.0mm, thickness are 1.6～2.0mm that M51 material is heat-treated the front diameter that first cuts into, and then, by its surperficial greasy dirt of Ultrasonic Cleaning, heat-treats afterwards, heat treatment is that to put into temperature be to quench in the vacuum drying oven of 1185～1200 ℃ by cleaning M51 material after greasy dirt, continue after 15min, also can be the arbitrary value between 10min or 30min or 10～30min, immersed temperature and be in the liquid nitrogen of-230～-190 ℃ and carried out subzero treatment, subzero treatment is also to carry out in vacuum drying oven, the pressure of its cooler environment is 8～9bar, be incubated after being naturally warming up to 30 ℃ after 1～2 hour and carry out tempering, also after can being warming up to the arbitrary value between 20 ℃ or 20～30 ℃, carry out again tempering, temperature is 600 ℃, also can be the arbitrary value between 500 ℃ or 500～600 ℃, tempering time is 1.5h, also can be the arbitrary value between 1h or 2h or 1～2h, then naturally cool to after 25 ℃, also can be the arbitrary value between 20 ℃ or 30 ℃ or 20～30 ℃, times of tempering is 2 times, also it can be 3 times, the HRC of tooth material 2 last moulding is 68～70.Times of tempering is without surpassing 3 times, and surpassing can increase cost 3 times and tempering effect is also not obvious; The cooled M51 material of tempering is carried out to plating nickel on surface processing, and the thickness of nickel is 10um, can be also the arbitrary value between 10um or 20um or 10～20um.
Steel band 1 is heat-treated; The material of steel band 1 is D6A material, can be also X32 material, M51 ,D6A HeX32Dou Shi U.S. type of steels; D6A and X32 belong to alloy spring steel, are all widely used in being with frame saw blade to produce upper, and X32 is for just being applied in recent years, and X32 alloying elements cr content is higher than D6A, and its anti-fatigue ability and tensile strength are all better than D6A, but material cost is higher than D6A.Concrete operations are as follows:
A. steel band 1 is heat-treated front first carry out scraping, alignment, then carries out deburring, and by its surperficial greasy dirt of Ultrasonic Cleaning, scraping is bright and clean in order to guarantee steel band 1 back afterwards, and alignment is in order to prevent that after steel band 1 heat treatment, seriously cutter is curved.
B. the heat treatment of steel band 1: it is that 800 ℃, the middle tempering furnace that is 500 ℃ for oil cooling, temperature quench and tempering that the steel band 1 by cleaning after greasy dirt is put into hardening heat, certainly hardening heat can be also the arbitrary value between 900 ℃ or 800～900 ℃, temperature can be also the arbitrary value between 400 ℃ or 600 ℃ or 400～600 ℃, the speed that steel band 1 passes from tempering furnace, be that tape running speed is 2m per minute, also can be the arbitrary value between 1m or 3m or 1～3m, the HRC of steel band 1 last moulding be 48～50.
C. polishing: steel band 1 is passed to buffing machine, and utilize abrasive grain (46#) to modify processing to steel band 1 surface, improve surface smoothness, the contact resistance while reducing welding.
Step 2: steel band 1 is carried out to the cutting of teeth groove line; The length that becomes buck saw to require 1 severing of the steel band after polishing, general length is 450-550mm, again the buck saw of 40-50 root equal length is stacked and uses clamp, be placed in again and on wire cutting machine tool, carry out cutting teeth groove, the spacing of each crown is unequal, and completes the cutting of buck saw mounting-positioning holes.
Step 3: M51 material is welded on steel band 1, is frame saw blade after welding;
Welding is that the M51 material carrying out after plating nickel on surface processing is welded on the steel band 1 having carried out after teeth groove cutting, welding manner adopts separate form electric resistance welding, the speed of welding of separate form electric resistance welding is fast, efficiency is high, and equipment volume is little, can reduce the volume of frame saw blade making apparatus.
Be 0.001s weld interval, also can be the arbitrary value between 0.0001s or 0.1s or 0.0001～0.1s, pressure during its welding is 2bar, also can be the arbitrary value between 1bar or 1～2bar, electric current is 1000A, also can be the arbitrary value between 800A or 800A～1000A, voltage be the arbitrary value between 10V or 15V or 10～15V.
Step 4: the tooth material 2 on steel band 1 is ground to zigzag, i.e. the grinding of crown; Carry out first frame saw blade being carried out to high frequency tempering before grinding.Grinding is to adopt grinding machine, and utilizes Carborundum wheel to be ground to sawtooth, can be also that CBN emery wheel carries out grinding.The speed of grinding is 4m, also can be the arbitrary value between 5m or 4～5m, the rotating speed of Carborundum wheel and CBN emery wheel is 9000r/min, also can be the arbitrary value between 8500r/min or 9500r/min or 8500～9500r/min, the granularity of Carborundum wheel and CBN emery wheel is 100#～200#, Carborundum wheel adopts diamond dust to electroplate combination, and CBN emery wheel all adopts pottery and resin as bonding agent.Grinding face comprises rake face 3, rear knife face 4, side knife surface 5 and relief angle fillet surface 6.
Step 5: frame saw blade is carried out to school curved, the grinding face on frame saw blade is that frame saw blade is anterior, and frame saw blade rear portion is rolled through running roller, makes steel band 1 rear portion produce thickness attenuation, the elongated plastic deformation of length, and frame saw blade forms so-called positive cutter curved 7.Its objective is frame saw blade is completed while being tightened up at clamping, the position near grinding face on frame saw blade is first tightened up, thereby can prevent run; Otherwise, if frame saw blade back is first tightened up, easily there is run.
Step 6: carry out sandblast packing by carrying out the frame saw blade of school after curved.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (9)
1. the manufacture method of frame saw blade, is characterized in that: comprises the following steps,
Step 1: tooth material is M51 material, after M51 material is cut into diameter and is 2.0～3.0mm, the thickness cylinder particle that is 1.6～2.0mm, heat-treats M51 material, and steel band is heat-treated;
Step 2: steel band is carried out to the cutting of teeth groove line;
Step 3: M51 material is welded on steel band, is frame saw blade after welding; Welding manner adopts separate form electric resistance welding, and be 0.0001～0.1s weld interval;
Step 4: the tooth material on steel band is ground to zigzag.
2. the manufacture method of frame saw blade according to claim 1, it is characterized in that: M51 material heat-treat front first by the M51 material that cuts into cylinder particle by its surperficial greasy dirt of Ultrasonic Cleaning, heat treatment step comprises that to put into temperature be to quench in the vacuum drying oven of 1185～1200 ℃ by cleaning M51 material after greasy dirt, cool time is 10～30min, after quenching, immersed temperature and be in the liquid nitrogen of-230～-190 ℃ and carried out subzero treatment, the pressure of its cooler environment is 8～9bar, be incubated after 1～2 hour relief M51 material is warming up to 20～30 ℃ naturally and carry out tempering, temperature is between 500～600 ℃, tempering time is 1～2h,
Then be cooled to 20～30 ℃, tempering step is to complete for 2 to 3 times, and the HRC of the last moulding of tooth material is 68～70.
3. the manufacture method of frame saw blade according to claim 2, is characterized in that: the M51 material after heat treatment is carried out to plating nickel on surface processing, and the thickness of nickel is 10～20um.
4. according to the manufacture method of the frame saw blade described in claim 1 or 2 or 3, it is characterized in that: the heat treatment of steel band be by cleaning the steel band after greasy dirt to put into hardening heat be that 800～900 ℃, the middle tempering furnace that is 400～600 ℃ for oil cooling, temperature quench respectively and tempering, the HRC of last moulding is 48～50.
5. the manufacture method of frame saw blade according to claim 4, is characterized in that: in steel band heat treatment step, the tape running speed of steel band in tempering furnace is 1～3 meter per minute.
6. the manufacture method of frame saw blade according to claim 3, it is characterized in that: it is steel band to be cut into the length of 450-550mm that steel band is carried out to the cutting of teeth groove line, again the steel band of 40-50 root equal length is stacked rear by clamp, be placed on wire cutting machine tool and cut teeth groove, the spacing of each crown is unequal.
7. the manufacture method of frame saw blade according to claim 6, is characterized in that: the welding in step 3 is that the M51 material carrying out after plating nickel on surface processing is welded on the steel band carrying out after the cutting of teeth groove line.
8. according to the manufacture method of the frame saw blade described in claim 1 or 7, it is characterized in that: the grinding in step 4 is to utilize Carborundum wheel or CBN emery wheel to carry out grinding to the tooth material on frame saw blade, and grinding face comprises rake face, rear knife face, side knife surface and relief angle fillet surface.
9. the manufacture method of frame saw blade according to claim 8, is characterized in that: also comprise step 5: frame saw blade is carried out to school curved; Grinding face on frame saw blade is that frame saw blade is anterior, running roller is carried out in frame saw blade rear portion and roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310560896.4A CN103600124B (en) | 2013-11-12 | 2013-11-12 | The manufacture method of frame saw blade |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310560896.4A CN103600124B (en) | 2013-11-12 | 2013-11-12 | The manufacture method of frame saw blade |
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| CN103600124A true CN103600124A (en) | 2014-02-26 |
| CN103600124B CN103600124B (en) | 2016-08-17 |
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| CN201310560896.4A Expired - Fee Related CN103600124B (en) | 2013-11-12 | 2013-11-12 | The manufacture method of frame saw blade |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103962643A (en) * | 2014-04-04 | 2014-08-06 | 浙江虎鼎机械制造有限公司 | Blade structure of metal cutting circular sawing machine and machining technology |
| CN103962644A (en) * | 2014-02-28 | 2014-08-06 | 温岭市工量刃具行业协会 | Process for manufacturing bimetal strip band saw blade |
| CN105345145A (en) * | 2014-08-19 | 2016-02-24 | 浙江缙云韩立锯业有限公司 | High-speed steel saw blade inlaid with teeth and manufacturing method of high-speed steel saw blade |
| CN108057928A (en) * | 2017-12-25 | 2018-05-22 | 芜湖锐进医疗设备有限公司 | A kind of medical treatment electric drill blades machining technique |
| CN110202286A (en) * | 2019-05-17 | 2019-09-06 | 寇浩 | Bands for band full automatic welding tooth technique |
| CN111715940A (en) * | 2020-07-15 | 2020-09-29 | 无锡度阳金属制品有限公司 | Metal saw blade and preparation method thereof |
| CN112296618A (en) * | 2020-09-16 | 2021-02-02 | 南通西土瓦工贸有限公司 | Manufacturing process of cutting die |
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| DE29901675U1 (en) * | 1999-02-01 | 2000-06-29 | MPS Systems GmbH, 22844 Norderstedt | Saw blade for frame saws |
| US20030213531A1 (en) * | 2002-05-17 | 2003-11-20 | Conry Patrick M. | Article scanning method and apparatus for computer-controlled sawing machines |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103962644A (en) * | 2014-02-28 | 2014-08-06 | 温岭市工量刃具行业协会 | Process for manufacturing bimetal strip band saw blade |
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| CN103962643A (en) * | 2014-04-04 | 2014-08-06 | 浙江虎鼎机械制造有限公司 | Blade structure of metal cutting circular sawing machine and machining technology |
| CN105345145A (en) * | 2014-08-19 | 2016-02-24 | 浙江缙云韩立锯业有限公司 | High-speed steel saw blade inlaid with teeth and manufacturing method of high-speed steel saw blade |
| CN108057928A (en) * | 2017-12-25 | 2018-05-22 | 芜湖锐进医疗设备有限公司 | A kind of medical treatment electric drill blades machining technique |
| CN110202286A (en) * | 2019-05-17 | 2019-09-06 | 寇浩 | Bands for band full automatic welding tooth technique |
| CN111715940A (en) * | 2020-07-15 | 2020-09-29 | 无锡度阳金属制品有限公司 | Metal saw blade and preparation method thereof |
| CN112296618A (en) * | 2020-09-16 | 2021-02-02 | 南通西土瓦工贸有限公司 | Manufacturing process of cutting die |
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|---|---|
| CN103600124B (en) | 2016-08-17 |
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