CN1846915A - Double-metal hand saw blade and its production process - Google Patents
Double-metal hand saw blade and its production process Download PDFInfo
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- CN1846915A CN1846915A CN 200610039788 CN200610039788A CN1846915A CN 1846915 A CN1846915 A CN 1846915A CN 200610039788 CN200610039788 CN 200610039788 CN 200610039788 A CN200610039788 A CN 200610039788A CN 1846915 A CN1846915 A CN 1846915A
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Abstract
The double-metal hand saw blade includes a blade back body, a blade tooth body and a connecting body of silver alloy in between. The production process of the double-metal hand saw blade includes the following steps: preparing material, welding, cutting teeth, heat treatment, and packing. The double-metal hand saw blade has high teeth hardness, high wear resistance, excellent cutting performance, high toughness, long service life, high work efficiency and low production cost.
Description
Technical field
The present invention relates to Metal Cutting machining tool technical field, particularly a kind of hand saw blade and production method thereof.
Background technology
Bimetal hand saw blade (Bimetal hacksaw blades) is the member that sawtooth and hump are respectively high-speed steel and two kinds of different materials of spring steel, adopt technology such as vacuum electron beam welding or laser weld them to formed a kind of novel saw blade welded together.This saw blade has the cutting ability of high-speed steel, and good toughness, and sharp wear-resisting and frangibility not receives praises from customers during use.Yet, produce bimetal hand saw blade by vacuum electron beam or laser weld, its technological requirement height, the equipment complexity, and cost an arm and a leg, production cost is higher.
Summary of the invention
The objective of the invention is to, propose a kind of bimetal hand saw blade and special-purpose production method thereof of new structure, the product according to described production method is produced had both possessed good serviceability, can significantly reduce production costs simultaneously.
The objective of the invention is to realize by following technical solution:
A kind of bimetal hand saw blade comprises sawtooth body and hump body, it is characterized in that, also comprises connector, and the sawtooth body is by the fixedly connected hump body of connector, and connector is a silver alloy.
A kind of production method of bimetal hand saw blade, it comprises following operation:
1. get the raw materials ready:, prepare the sawtooth body and the hump body blank of given size by the requirement of saw blade different size;
2. welding: use high-frequency welding machine, adopt silver brazing technology welding sawtooth body and hump body;
3. tooth punching side set: that will weld finishes saw blade tooth punching and side set;
4. heat treatment: the saw blade of finishing tooth punching and side set is quenched and heat treatment such as tempering, and quenching temperature is 1200～1260 ℃, and chilling temperature is 450～500 ℃, and temperature is 550～580 ℃, and times of tempering is 1～3 time;
5. finished product packing: saw blade is sprayed paint, sprays word, packing.
By aforesaid process of the present invention, adopt comparatively simple equipment and technology, unexpectedly realize using traditional soldering tech of the present invention's employing and the process that matches, just can prepare the bimetal hand saw blade that satisfies instructions for use fully, and production cost can reduce significantly.It is connected the bimetal hand saw blade of sawtooth body and hump body by silver-base solder (being commonly called as silver wire) welding formation connector, can reach and connect the effect that fastness, flatness may compare favourably with laser-welded product in the use, product gear portion hardness height, anti-wear performance is good, has good cutting ability, the back fatigue resistance is big, unique pliability can be kept simultaneously, various external force such as drawing, bend, roll over, cut can be born in the use, not frangibility, long service life improves operating efficiency greatly.
Purpose of the present invention, advantage and characteristics will illustrate by the non-limitative illustration of following preferential embodiment and explain that these embodiment only provide as an example.
Description of drawings
Fig. 1 is the process schematic diagram of process step of the present invention;
Fig. 2 is the saw blade schematic cross-section of the embodiment of the invention one monolateral tooth punching;
Fig. 3 is the saw blade schematic cross-section of the embodiment of the invention two bilateral tooth punchings.
In the accompanying drawing, the 1-saw blade; 2-hump body; 2W-hump body width; The 3-connector; 3W-connector width; 4-sawtooth body; 4W-sawtooth body width.
The specific embodiment
Embodiment one:
With reference to shown in Figure 1, present embodiment production craft step process is as follows:
(1) gets the raw materials ready
As shown in Figure 2, the present embodiment finished product is the saw blade 1 of monolateral tooth punching, and its specification length is 300mm, and width is 12mm, and thickness is 0.6mm, and tooth pitch is the standard tooth form (0 ° of anterior angle) of 1.2mm.By the requirement of saw blade 1 specification, prepare the hump body 2 of given size and the blank of sawtooth body 4.The material of general hump body 2 is a spring steel, as 65Mn, 60Si2Mn, 50CrMnV etc., the material of sawtooth body 4 is a high-speed tool steel, as W6Mo5Cr4V2 (M2), W6Mo5Cr4V3 (M3), W4Mo2Cr4V (4241), W4Mo3Cr4V (4341), W9Mo3Cr4V (9341) etc., present embodiment adopts the material of 50CrMnV high duty alloy spring steel as hump body 2, adopts the material of W6Mo5Cr4V2 high-quality high-speed tool steel as sawtooth body 4.The hump body width 2W of general monolateral sawtooth is 55%～80% of saw blade 1 width, sawtooth body width 4W is 15%～40% of saw blade 1 width, the clean hump body width 2W of present embodiment blanking is 7.5mm, be 62.5% of saw blade width, clean sawtooth body width 4W width is 4mm, is about 33.3% of saw blade width, and their welding position requires smooth even, and there are not oil, rustless, no dirt, exclusion etc., stand-by;
(2) welding
Welding is the critical process that the present invention guarantees the product serviceability, and the present invention welds high-frequency induction brazing (the Hi-frequency Induction Brazing) technology that adopts.Present embodiment locatees monolithic sawtooth body 4 blanks and hump body 2 blanks to putting, generally can reserve weld seam 0.1～1.2mm, be about 8.3～10% of saw blade 1 width, present embodiment is reserved the 0.5mm weld gap, use high-frequency welding machine, adopting the trade mark is BAg65CuZn silver wire (fusion temperature is in 685～720 ℃ of intervals), and silver-colored brazing flux 101 or silver-colored brazing flux 102, smooth to welded together.Adopt the solder of money base solid solution, it has the moderate good processing performances such as temperature, good wetability and penetrating power of dissolving, and the face of weld of silver soldering is smooth bright and clean, does not have obvious crator, and weld strength, plasticity and electric conductivity are all better.Simultaneously, the soldering heating-up temperature is lower, and the structure property of weldment changes little, is out of shape for a short time, can guarantee precision.High-frequency induction heating is adopted in the present embodiment welding, and material internal heating efficiency height can be finished heating process usually in very short time, and eddy-current heating fast, evenly can effectively prevent embrittlement, fracture and distortion that the saw blade hot-spot causes.The weld seam that soldering forms becomes connector 3, and it is the silver alloy composition, and its connector width of present embodiment 3W is 0.5mm, is about 4.2% of saw blade 1 width, and its weld strength is at 30KN/cm
2More than, tensile strength is greater than 480Mpa, and shearing strength is greater than 360Mpa.The present invention adopts high-frequency induction brazing to compare with existing other welding methods, sharpest edges are that its equipment investment is few, welding procedure is simple, can significantly reduce production costs, in addition, it is good to have the welding product quality, and almost non-environmental-pollution, technological operation are easy to grasp, repeatability and good reproducibility are easy to realize series of advantages such as the production automation.
(3) tooth punching side set
Use tooth punching side set equipment, the specification requirement of pressing saw blade tooth pitch 1.6mm standard sawtooth, the saw blade base substrate that silver soldering is finished carries out tooth punching and side set;
(4) heat treatment
Heat treatment step is very crucial to guaranteeing product quality of the present invention.The general heat treatment main technologic parameters of bimetal hand saw blade comprises: quenching temperature is 1200～1260 ℃, and chilling temperature is 450～500 ℃, and temperature is 550～580 ℃, and times of tempering is 1～3 time.Bimetal hand saw blade hump body 2 is different materials with sawtooth body 4, and fusing point is different, and heat treatment requirements is also different.Bimetal saw blade is carried out the deficiency of quenching and tempering at existing heat treatment technics; the present invention uses the vacuum hydrogen shield heat-treatment furnace (CN02205296.8) of patented technology; under vacuum or hydrogen shield state, heat; with hydrogen or mist as refrigerating gas; the semi-products saw blade of tooth punching and side set is carried out the gas heat treatment of quenching; refrigerating gas is that hydrogen is or/and helium; or they and be not more than the mist of the inert gas (as nitrogen) of 35% volume; and fully take into account bimetal hand saw blade sawtooth body 4; the different materials situation of hump body 2 and connector 3, it is modified to carry out tempering.The heating in vacuum temperature that present embodiment quenches is got 1230 ℃, and chilling temperature is got 470 ℃, and refrigerating gas is got the mist that volume is 75% hydrogen and 25% nitrogen, quenches, and temperature is got 570 ℃, and times of tempering is 2 times.Adopt technology of the present invention to carry out heating in vacuum, it is overheated not take place, and can reduce the saw blade heat treatment deformation, saw blade surface nondiscolouring, not decarburization.Because the atomic weight minimum of hydrogen, be a kind of extremely active gas, particularly under the condition of high temperature of heating, rolling speed is unusual fast, and the conduction of velocity of hydrogen is 7 times of nitrogen, hydrogen is with its thermal conducting function efficiently, in the time of can guaranteeing heat treatment in the conversion of positive/negative pressure and heating cooling operate as normal, therefore, the gas of present embodiment is quenched, can obtain higher quenching degree, very help the quenching quality of saw blade sawtooth.Present embodiment adopts 2 high temperings, and feasible bimetallic material through quench hot can access modified preferably.After heat treatment, the general tooth of the bimetal hand saw blade hardness HRC61 of portion～65 degree, back hardness HR44～45, crooked 360 degree resiliences are straight, bending diameter is not less than 60mm and can fracture.Simultaneously, adopt Technology for Heating Processing of the present invention, unexpectedly kept the integrality and the switching performance thereof of the not too high silver alloy connector 3 of soldering fusion temperature, smooth bright and clean, use not come off, rupture.
(5) finished product packing
To spraying paint, spray word, packing, warehouse-in through heat treated saw blade.
Embodiment two:
As shown in Figure 3, the technical scheme of present embodiment is similar substantially to embodiment one, and difference is: the present embodiment finished product is the saw blade 1 of bilateral tooth punching.The hand saw blade width of bilateral tooth punching can be 12～65mm, and its specification width of present embodiment is 25mm, and length is 250mm, and thick is 0.6mm, and tooth pitch is the 0.8mm full-height tooth; In procedure for preparation of the present invention, press the specification requirement of saw blade 1, prepare the hump body 2 and sawtooth body 4 blanks of given size.The hump body width 2W of general two-sided sawtooth is 45%～94% of saw blade 1 width, sawtooth body width 4W is 3%～30% of saw blade 1 width, the clean hump body of present embodiment blanking width 2W gets 17.8mm, the clean sawtooth body of monolithic width 4W gets 3mm, be respectively 71.2% and 12% of saw blade 1 width, stand-by; In welding sequence of the present invention, use the high-frequency induction brazing technology, with two blade saw denticles, 4 blanks, smooth respectively to being welded in the dual-side of hump body 2 blanks, generally can reserve weld seam 0.1～1.2mm, be about 0.15～10% of saw blade 1 width, every weld gap of this enforcement stays 0.6mm, welding forms connector 3, and its connector width 3W is 2.4% of a saw blade width.
Above-mentioned two embodiment are as an illustration example only, is not the qualification that the present invention is done.The present invention can also adopt other materials, mode, step and equipment to implement, and does not give unnecessary details one by one at this.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all belong to the protection domain of requirement of the present invention.
Claims (5)
1, a kind of bimetal hand saw blade comprises hump body (2) and sawtooth body (4), it is characterized in that, also comprises connector (3), and hump body (2) is by the fixedly connected sawtooth body of connector (3) (4), and connector (3) is a silver alloy.
2, bimetal hand saw blade according to claim 1, it is characterized in that, it is monolateral tooth punching, one side of described hump body (2) is by the fixedly connected sawtooth body of connector (3) (4), described hump body width (2W) is 55～80% of a saw blade width, sawtooth body width (4W) is 15～40% of a saw blade width, and connector width (3W) is 8.3～10% of a saw blade width.
3, bimetal hand saw blade according to claim 1, it is characterized in that, it is bilateral tooth punching, the both sides of described hump body (2) are all by the fixedly connected sawtooth body of connector (3) (4), described hump body width (2W) is 45～94% of a saw blade width, sawtooth body width (4W) is 3～30% of a saw blade width, and connector width (3W) is 0.15～10% of a saw blade width.
According to the production method of claim 1,2 or 3 described bimetal hand saw blades, it is characterized in that 4, it comprises following operation:
1. get the raw materials ready:, prepare the sawtooth body and the hump body blank of given size by the requirement of saw blade different size;
2. welding: use high-frequency welding machine, adopt silver brazing technology welding sawtooth body and hump body;
3. tooth punching side set: that will weld finishes saw blade tooth punching and side set;
4. heat treatment: the saw blade of finishing tooth punching and side set is quenched and heat treatment such as tempering, and quenching temperature is 1200～1260 ℃, and chilling temperature is 450～500 ℃, and temperature is 550～580 ℃, and times of tempering is 1～3 time;
5. finished product packing.
5, the production method of a kind of bimetal hand saw blade according to claim 4 is characterized in that, described quenching is that gas is quenched, and refrigerating gas is a hydrogen or/and helium, or they and be not more than the mist of the inert gas of 35% volume.
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| CN 200610039788 CN1846915A (en) | 2006-04-18 | 2006-04-18 | Double-metal hand saw blade and its production process |
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| CN 200610039788 CN1846915A (en) | 2006-04-18 | 2006-04-18 | Double-metal hand saw blade and its production process |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337474A (en) * | 2011-08-19 | 2012-02-01 | 浙江约特工具有限公司 | Saw blade back material steel and application thereof to bimetal band saw blade |
| CN103635279A (en) * | 2011-07-01 | 2014-03-12 | 罗伯特·博世有限公司 | Tool |
| 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 |
| 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 |
| CN104043873A (en) * | 2013-03-14 | 2014-09-17 | 东莞市萨浦刀锯有限公司 | Manufacturing process of dual-metal belt saw |
| CN105880734A (en) * | 2014-11-24 | 2016-08-24 | 邱志强 | Production method of small high-frequency bimetal band saw blade |
| CN110468271A (en) * | 2019-09-23 | 2019-11-19 | 无锡蓬天工具有限公司 | A kind of hole saw heat treatment process |
| CN111408805A (en) * | 2020-03-05 | 2020-07-14 | 西安陕鼓动力股份有限公司 | Manufacturing process method of impeller in same furnace for brazing and performance heat treatment |
| CN114378366A (en) * | 2021-12-13 | 2022-04-22 | 江苏爱利德科技有限公司 | Bimetal alloy saw blade and preparation method thereof |
-
2006
- 2006-04-18 CN CN 200610039788 patent/CN1846915A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103635279A (en) * | 2011-07-01 | 2014-03-12 | 罗伯特·博世有限公司 | Tool |
| US10792740B2 (en) | 2011-07-01 | 2020-10-06 | Robert Bosch Gmbh | Tool |
| US10427229B2 (en) | 2011-07-01 | 2019-10-01 | Robert Bosch Gmbh | Tool |
| CN102337474A (en) * | 2011-08-19 | 2012-02-01 | 浙江约特工具有限公司 | Saw blade back material steel and application thereof to bimetal band saw blade |
| CN102337474B (en) * | 2011-08-19 | 2013-05-15 | 浙江约特工具有限公司 | Saw blade back material steel and application thereof in bimetal band saw blade |
| CN104043873A (en) * | 2013-03-14 | 2014-09-17 | 东莞市萨浦刀锯有限公司 | Manufacturing process of dual-metal belt saw |
| CN103962644B (en) * | 2014-02-28 | 2016-06-22 | 温岭市工量刃具行业协会 | A kind of manufacturing process of bi-metal bandsaw blades |
| 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 |
| 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 |
| CN105880734A (en) * | 2014-11-24 | 2016-08-24 | 邱志强 | Production method of small high-frequency bimetal band saw blade |
| CN110468271A (en) * | 2019-09-23 | 2019-11-19 | 无锡蓬天工具有限公司 | A kind of hole saw heat treatment process |
| CN111408805A (en) * | 2020-03-05 | 2020-07-14 | 西安陕鼓动力股份有限公司 | Manufacturing process method of impeller in same furnace for brazing and performance heat treatment |
| CN111408805B (en) * | 2020-03-05 | 2021-09-17 | 西安陕鼓动力股份有限公司 | Manufacturing process method of impeller in same furnace for brazing and performance heat treatment |
| CN114378366A (en) * | 2021-12-13 | 2022-04-22 | 江苏爱利德科技有限公司 | Bimetal alloy saw blade and preparation method thereof |
| CN114378366B (en) * | 2021-12-13 | 2022-12-23 | 江苏爱利德科技有限公司 | Preparation method of bimetal alloy saw blade |
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