Background technology
Diamond saw blade, particularly diamond circular saw blade have been widely used in the cutting processing of nonmetal hard construction material (as marble, granite, cement products etc.).Diamond saw blade is made up of diamond block and saw bit matrix two parts.The connecting shaping of diamond block and matrix (steel) has three kinds of methods usually: ratio-frequency welding connection, method of laser welding and sintering process.
In the technical indicator of diamond circular saw blade, except mechanical property, outside rigidity, the flatness, the thickness of saw blade also is the key index that non-metal hard construction material processing industry is concerned about, because the thickness of saw blade directly influences the utilization rate of cutting processing efficient, energy consumption and raw material (waste material) to this class construction material.Saw blade thickness reduces, and then cutting processing efficient increases, and energy consumption reduces, and utilization rate of raw materials improves, and economic benefit rises.
Reducing of diamond disc thickness mainly is the minimizing of saw bit matrix thickness.Under the matrix of identical material, the minimizing of matrix thickness will cause rigidity to descend, and the bearing load ability reduces, until losing normal cutting processing ability.Therefore, under the situation that guarantees saw bit matrix rigidity, seeking the thinnest saw bit matrix is that people pay close attention to, particularly large diameter saw bit matrix.
Over nearly this year, people are studying slim diamond saw blade substrate always, have also obtained certain achievement.
In the prior art, the slim circular saw blade substrate of diamond is thinned to thickness below the setting from ISO6105 and GB11270 standard on external diameter matrix of the same race, general attenuate amount 0.7mm, maximum attenuate amount has reached 3.7mm, and the thickness of existing slim circular saw blade substrate has reached following index:
Diameter of phi 1801~Φ 2000mm, thickness 8.0~6..5mm;
Diameter of phi 1601~Φ 1800mm, thickness 6.0~7.0mm;
Diameter of phi 800~Φ 1600mm, thickness 6.0~5.0mm.
The application studies show that: the thickness of above-mentioned circular saw blade substrate still is not minimum thickness, and promptly thickness still has the leeway that reduces.
The existing manufacture method of diamond circular saw film base body mainly is to adopt quenching, tempering and machined thereof.Its quenching technical generally adopts Quenching press, apparatus expensive, troublesome poeration.
Summary of the invention
The objective of the invention is to guaranteeing that circular saw blade substrate reaches under the situation of required mechanical property, rigidity, provides a kind of superthin diamond circular saw web matrix and manufacture method thereof.
At above-mentioned purpose, superthin diamond circular saw web matrix steel grade of the present invention adopts the 50Mn2V steel, and its concrete chemical analysis (wt%) is as follows:
C:0.35~0.65%, Si:0.10~0.35%, Mn:1.20~2.00%, all the other are Fe for V:0.06~0.20%.
This steel is after quenching+tempering, and its mechanical property can reach following index:
σ
b:1300~1500N/mm
2,σ
0.2:1200~1400N/mm
2,δ
5:10~15%,φ:41~46%,α
k:40~50J/cm
2,HRC41~46。
The thickness that the ultra-thin circular saw blade substrate of the present invention reaches is:
Matrix diameter of phi 1800~Φ 2000mm, thickness 4.5~6..5mm;
Matrix diameter of phi 1600~Φ 1800mm, thickness 3.5~5..5mm;
Matrix diameter of phi 800~Φ 1600mm, thickness 3.0~5.0mm.
The manufacture method of superthin diamond circular saw web matrix of the present invention comprises following operation: blanking, machined, quench, exert pressure, tempering, smooth and roll, check.Existing division is as follows:
1, blanking
According to required matrix external diameter, adopt the plasma cutting stock.
2, machined
Machined comprise boring (centre bore etc.), rough turn, towards tooth.
3, quench
Matrix carries out Quenching Treatment after machined, the heating of quenching is carried out in salt bath furnace, and heating-up temperature is 800~860 ℃, and 15~30 minutes heat time heating times, hardening media is a machine oil, and oily temperature is 50~130 ℃, and the quenching burst carries out.
4, exert pressure
After matrix quenches in machine oil, enter in the forcing press immediately and exert pressure, the pressure of exerting pressure is 1.5~50kgf/cm
2, the time of exerting pressure is 5~30 minutes.
5, tempering
After matrix was exerted pressure, many overlapping was clamped in the anchor clamps, puts into tempering furnace together with anchor clamps and carries out temper.Temperature is 350~460 ℃, tempering time 4~8 hours.
6, smooth, roll and check
Matrix carries out finish turning, grinding, smooths and rolls after tempering, and on four unification inspection machines, flatness, the end of matrix is jumped into row and proofreaied and correct.
Adopt manufacture method of the present invention can produce with the thinner ultrathin diamond circular saw film base body of thickness under the diameter.The technical indicator that is reached is as shown in table 1:
Table 1: superthin diamond circular saw web matrix technical indicator of the present invention:
Specification (mm) | Thickness (mm) | Flatness (mm) | End is jumped (mm) |
????Φ2000 | ????4.5~6.0±0.1 | ????0.65 | ????0.85 |
????Φ1800 | ????3.5~5.5±0.1 | ????0.62 | ????0.65 |
????Φ1600 | ????3.0~5.0±0.1 | ????0.60 | ????0.62 |
????Φ800 | ????3.0~4.0±0.1 | ????0.25 | ????0.40 |
Compared with prior art, the present invention has following advantage:
(1) but, adopt the thinner ultrathin diamond circular saw film base body of thickness under the manufacture method production same diameter of the present invention.
(2), owing to have ultrathin, under same size, can save matrix steel and diamond saw joint piece, reduce the cost of saw blade.
(3), with respect to the saw blade of same size standard thickness, superthin diamond circular saw web of the present invention can improve cutting processing efficient 10~20% when machining of non-metallic hard construction material, cut down the consumption of energy 30%, raw material (waste material) utilization rate improves 10~15%.