wan long's Open Salon Blog

Diamond tools within the application should take note of?

Wed, 23 May 2012 23:05:50 -0400

1. before having a new Dresser, exit through the last finished feed. Many quality crisp diamond dressing tools, in contact with the wheel at the start, can be simply damaged.
2. tilt angle 10-15 ° diamond dressing tools installed so that it points on the direction of rotation on the wheel.
3. firmly mounted dresser or clamping the trimming tools, tool head pendant shall not be to much time.
4. in may cases, to make use of cooling liquid. Entire repair time, and emery wheel exposure to the coolant pour dressing tools.
5. the dressing in the beginning of, beginning from the highest point in the wheel, usually for your middle of the wheel.
6. takes note of minor addition of. Maximum depth of subject, for coarse adjustment, inter alia: 0.001-0.002 inches. For intensive subject: 0.0005 to 0.001 inch.
7. Find the appropriate lateral movement according to the relevant manual. Horizontal moving slower (with a allow scale), having access to lower the counter roughness in grinding wheel.
8. has to be within the specified interval about the dressing of grinding wheel to avoid wheel blunt, the grinding force increases.
9. within the specified time interval, knife clip trimming tool, rotate the main one-eighth ring, and keep the dressing tools will always be sharp.
10. When diamond Dresser blunt or tools or clearly in peacetime, must be adjusted and replaced promptly.
11. Based on the diameter size the emery wheel, diamond CARAT weight selection (content of pure diamond), larger diameter of emery wheel, select larger diamond CARAT value.
Attention
1. Whenever you place the first holder of diamond dressing tools, careful not to ever hit the top of grinding wheel.
2. no point diamond dressing wheel Center vertically alignment tools head, normally tilt of 10-15 °.
3. heat dressing tools to not be "quenched" (meaning sudden cold). In the event the dry dressing, must keep your two trimming interval of time, enough to get the fever of dressing tools cooling.
4. cannot assume how the wheel has got the ideal flat on the outside. Once you begin trimming, find the location from the highest point of the wheel, trim.
5. If at all possible, every wheel repair furthermore, no greater than 0.001 inches around the radius on the wheel. Addition of enormous amount might cause premature wear of diamond dressing tools and quite often broken.
6. although not every addition towards the allowance is just too big small. For old or poor rigidity can not be officially used on a unit tool emery wheel dressing.
7. attention to trimming cannot be in one place a long time time. This makes the top polishing wheel, contributing to high temperatures and damage diamonds dressing tools. Rotating dressing tool at least once per day.
8. not being deterioration or damage the trim tool. Ought to be to adjust or put it back.
9. without having rough trimming would be to select an overhaul together with mass and transverse feed rate too quickly, and then select when finishing trim repairs along with volume and slow Traverse feed rate. This will likely quickly damage diamonds dressing tools. If possible, experts recommend that when rough finishing and fine finishing, select the same transverse feed rate.

Diamond tools the way to improve

Wed, 23 May 2012 23:05:24 -0400

Diamond cutters include the most frequent types of cutting tools, basically because of the matrix and diamond tool made up of two parts, quite simple, many manufacturers work regarding how to improve Diamond cutter. Compressor of your very lots of applications, a compressor is frequently consisting of hundreds or 1000s of components, complex manufacturing process, technical requirements. In order to meet the production needs of the several parts, tooling and fixture is vital to reasonably designed with, to meet up with the needs of excellent, fast, and have to be improved additionally , on a number of diamond cutting tools and tooling design. Give three examples below:
Improvement, straight shank end milling cutter
2Cr13 chromium steel material from the packed Chamber, face width 12mm, dark 20mm, 200mm diameter ring groove. Initially using §? made 12 straight shank end mills for high-speed steel processing, deep 5mm, processing and adhesion of diamond chip is lower than 5 minutes on the milling cutters, deteriorating cutting, milling cutter edge collapse, tool change frequently in the process, efficiency is incredibly low, machining an engagement ring groove to 150 minutes. Use after Japan's Mitsubishi diamond carbide milling cutter, although performance is better than about the former, but chip chip-stacking capacity addititionally there is tank problem, when automatic processing with the processing center, edge collapse, and in some cases the tool appears broken.
Saw blades production employing the same cutter. Saw blade manufacturing process continues to be relatively backward, improved results over the years is tiny, no breakthroughs recently, after greater than a year of research and development by the Eastern industrial automation limited, manufacture of CNC gear drive devices, production pictures progress on saw blade technology, its device term for the saw blade automatic open CNC gear hobbing machine (CNC gear opened presses). Figure
Saw open effect of tooth-CNC turret punch press, high precision, small cuts better, equipment investment, high production efficiency, replace the automatic mechanical punching machine, ideal for large batch production line use. High degree of automation, saving labor and improve yield.
Second, improvement of milling flange diamond tools
Spiral tooth clutch one-way shape to spiral end face structure, torsional moment that passed itself off if it's above a clear value, generally known as safety clutch. Within the milling machine processing of the most extremely popular method a method of dividing head gear, calculated using the lead change, configure the proper implementation of change between head and table piece uniform rotation and uniform motion, thus processing the Archimedes curved surfaces. Tool selection Ñ„ 8~ Ñ„ 10 State milling knife, on knife Shi was required to Diamond milling knife cutting edged and workpiece axis phase cut, operation Shi tool fell to requirements depth Hou, min of handles insert min of Board hole within, shake min of handles 20 ring, in min of head rotating of while, table for longitudinal into to, makes workpiece for composite movement, are spiral slot; elevation tool, reverse turns min of head handles 20 ring, pull bolt, is constantly on the shake min of handles 20 ring, insert bolt, and repeat above steps processing another a spiral slot.
These costly processing methods, and can't be processed prior to drawings, stay the tooth root Cutter radius. Need manual repair file root part keeps its R0.5, low efficiency, accuracy just isn't guaranteed.
This phenomenon, mcdougal after careful analysis, and application of CAD-aided design, thought we would complete the main tooling and tooling improvements. Theoretical calculation of diamond cutter angles, shape, over, even offers begun to look at shape, necessary to guarantee is when to processing tool.
On reflection, I personally use existing universal tool and Cutter Grinder for machining of workplace, Ñ„ 22 domestic high-speed steel in spiral taper shank endmill with restructuring, front first grinding milling cutter, tyrannize tapered, single slope of 8 °. And then grinding angle, increases the chip capacity slot space, avoid more quick milling passes diamond chip stacking behavior occurs. Following your last operation was sharpening angle, angle is simply too small you can't start cutting pieces, it's the same simple make tool really advanced break. Processing because of this tool, extra point selecting 8 ° after ' quality 45# steel, try straight cutting effect is perfect, very smooth in the event the knife cuts deep 10MM.
Structure principle of three, tooling,
Its main part screw, right-handed helical teeth. Its working rule should be to turn hand wheel and drive the screw clockwise rotation, helical gears for counter clockwise (good stress analysis of helical gear, levorotation, axial force f up), resulted in a lead at the same time per week, simple structure and.
Tool after installation on milling machine spindle, vertical milling head turn clockwise to pull 7.5 °, level clamping tooling to milling machine working bench, what is the best parts fit. After trying have the effect is shocking, the entire spiral flange process took only 5 minutes to complete, more effective compared to original more times, tool our life is the first twice times, achieved once in every single 200 grinding machining technologically advanced, reuse tools around 10 times fully stick to the drawings and areas of the standards. Before that, spiral flange have try in three-axis machining vertical machining center with ball-end milling cutters (milling cutter machining helicoids interference), not just a longer processing time, and left the tool Nose Radius with the tooth root, subject to secondary processing.

Public knowledge of diamond cutlery

Wed, 23 May 2012 23:05:46 -0400

Ahead of the user in the selection and employ of diamond coated cutting tools, you should understand these several points concerning the diamond-coated tools wise practice:
(1) Distinction between CVD diamond-coated with amorphous diamond coating?
Amorphous diamond (also known as diamond-like carbon--photograph) coating is really a carbon film deposition when using the PVD process. It's both section of SP3 diamond, and portion of SP2 carbon; a high film hardness, but a lesser amount than the hardness of diamond-like carbon film; its thickness is thinner than we usually deposited diamond film. When processing graphite, amorphous diamond coating cutlery life will not be 2-3 times the coated cemented carbide tool. In comparison, CVD diamond is really a pure diamond coatings deposition using the CVD process, would be the tool lifetime of cemented carbide cutting tools in machining graphite 12-20, so that you can reduce tool change times, increase the reliability, consistency and accuracy of processing.
(2) No machining of hardened steel with diamond tool?
Diamonds are formed from carbon atoms. Some material when heated, will suck out carbon atoms in diamond and form carbides within the workpiece. Iron is truly one of such materials. When you use diamond tool machining of iron materials, friction heat generated will spread on the carbon atoms of iron in diamond, which caused early failure because of chemical wear of diamond coating.
(3) heavy grinding and (or) heavy coating of diamond film coated tools quality challenging maintain due to the tool surface coating for pure diamond, diamond grinding wheels for cutlery Regrinding has a period of time. Also, to allow the development of diamond cutting tools. Chemical properties on the preparation process will alter the tool surface, because of the coating requires very precise control above the chemical characteristics, effect of cutter coated again can hardly be guaranteed.
(4) the life of diamond coated cutting tools vary?
As with all other tool, diamond coated cutting tool life expectancy varies, according to cutting materials, variety of cutting speed and feed rate, as well as the geometry with the workpiece. Generally speaking, graphite machining carbide tools coated with diamond coated cutter life is not 10-20, in some cases even longer. Like this, you can apply any task processing via a tool, no tool wear and tool change, avoid processing interrupt and recalibrate, which makes it possible to achieve the unattended processing. Inside processing of composite materials, also may receive a longer tool life.
It can be reported that in processing high density fiberglass, when machining composite materials including carbon fibre and Gl0-FR4, of diamond coated cutting tools which are not coated cemented carbide tool life can be as high as 70 times.
(5) coated with diamond peeling of the coating can prevent peeling is really a serious problem of diamond coated cutting tools, and a faqs (specially when machining materials like carbon fibre), will cause tool our life is difficult to forecast. Late 90 's of the past century, surface chemistry characteristics were referred to as is a crucial factor influencing the performance of diamond-like carbon coating adhesion. By choosing a good compatibility of pretreatment of cemented carbide chemical characteristics, the usage of appropriate technology and sedimentary reply to reasonable conditions, you are able to reduce or remove the diamond coating peeling, stability of steady wear pattern. With a microscope observation of normal depreciation of diamond coated cutting tools can be obtained from, diamond was worn prior to the cemented carbide substrate by stability, without edge collapse or slack.

Classification of diamond cutlery

Wed, 23 May 2012 23:05:09 -0400

Natural diamond (ND) tool
Vines for diamond peak, that has this characteristics:
(1) spike shows we have a diamond.
(2) the wave amplitude (FWHM) 4.1cm-1
Looks like a pure diamond. ND is the hardest known mineral substances, mainly used in the preparation of Cutter tool. As soon as the fine grinding of natural diamond cutter edge radius all the way to 0.01~0.002μm.
Natural single crystal diamond (Single Crystalline Diamond,SCD) technologically advanced part of the tool power 1500 times times however to the edge smooth. SCD turning of aluminum piston Ra can reach 4μm, and within the same cutting conditions using PCD tool when machining the outer lining roughness of Ra for 15~50μm. SCD tool along with precision and ultraprecision machining precision lathe, mirror surface can be purchased.
Polycrystalline diamond (PCD) tool
PCD adopted under conditions of heat and super high pressure cobalt gathered metal bond diamond powder sintered polycrystalline materials synthesis, generally known as sintered diamond. Whole sintering of polycrystalline diamond tool cutter, milling, grain is a random arrangement of PCD are isotropic, uniform hardness, graphitization temperature of 550 ° c. Tool rich in hardness, high thermal conductivity, low thermal expansion coefficient, low coefficient of friction and high elastic modulus. Blade is quite sharp and many others.
Artificial polycrystalline diamond compact (PDC) tool
To enhance PCD blade toughness and weldability, PCD and carbide knives created from artificial polycrystalline diamond composite Blade (PDc). Cemented carbide substrate with pressed 0.5~1mm thick layer on its surface formed by sintering PCD. Flexural strength of composite blades with carbide, hardness all around PCD, can be an option to PCD. PCD and artificial polycrystalline diamond compact (PDC) tool for sharp edges and processing on the workpiece surface quality than ND. At the same time their poor machinability, grinding than small, difficult under the geometric form of the head. Currently using artificial polycrystalline diamond composite preparation tool are only able to still is not made indexable blade with chip breaker grooves and complex 3
dimensional surface geometry milling cutters.
CVD diamond thick film (TDF) welding tool
Welding of diamond thick film cutting tools are good CVD diamond thick film laser cut welded on the substrate (typically cemented carbide for your k class), occurance of PDC and polishing compound, welded to the body for the second time, grinding into your required shape and cutting edge. Figure 3 (a) below, and to CVD diamond thick films (diamond-like carbon film thickness up to 30μm), with good hardness, wear resistance, low friction characteristics, is good material for cutting non-ferrous metal and non-metal tool manufacturing. As a consequence of diamond welding technology complex, CVD diamond thick film (TDF) welding tool has not been high-volume applications.
Diamond coated cutting tools
Diamond-coated tools are directly inside the cemented carbide by CVD method (k form of cemented carbide) or
1~25μm Diamond-like carbon films deposited with a ceramic substrate layer, no cleavage surface of isotropic.
Figure 3 (b). Thin film coating tool hardness nearly 9800~10000HV. High thermal conductivity, thermal conductivity at room temperature approximately 2000W · m-1 · K-1, thermal conductivity only cemented
80~100m-1 · K-1ã€‚ CVD diamond coated tool on any complex shapes, the majority of this can be PCD cannot have significant advantages.
Cubic Boron Nitride (PCBN) tool
Cubic nitride boron (PCBN) is following artificial synthesis diamond zhihou appears of second species inorganic super hard material, its hardness slightly times Yu diamond, hot stability good, heat sexual can
reached 1400~1500du, than diamond of heat sexual (700~800du) almost high 1 time times. cubic nitride boron
(PCBN) tool main for processing various ferrous metals and alloy material; most for Yu various quenching hard steel (carbon pigment tools steel bearing steel die steel high speed steel) Pearlite ash mouth certain
(vanadium titanium surefire) Chilled surefire high temperature alloy (nickel base alloy cobalt base alloy) as well as the surface spray heap welding of processing. has using extremely deep seated, reduced for knife
number, compensation downtime by spent of your energy, makes NC machine and Automation type of efficient can will be more full of play, may change traditional of machinery processing way (is quenching Qian with tool roughing and quenching Hou with wheel fine processing of method), to can in the Taiwan NC machine for quenching Qian quenching Hou of turning processing (to car generation mill), has is nice of statistics.

Factors influencing the standard of diamond saw blade

Wed, 23 May 2012 23:05:10 -0400

First, cutting parameters
(1) saw blade speeds: in practice, diamond saw blades equipment condition, line speed of saw blades and cutting quality qieshi limits of nature. Through the best saw blades and cutting efficiency, service life, really should be selected according to the different nature on the stone saw line speed. When sawing granite, saw line speed may be selected inside the 25m~35m/s range. High silica content is difficult for sawing of granite, remove saw line posted speed limit. During output of granite tile, make use of a smaller diameter diamond circular saw blade, line speeds can reach 35m/s.
(2) feed speed: feed speed stone by cutting feed rate. Effect of cutting rates, the dimensions of saw blade sawing regions of stress and warm. Its value should be selected good nature of stone by cutting. In General, cutting soft stone for instance marble, can be appropriate to improve final results of feed, feed speed is too low, more conducive to improving the cutting rate. Cutting granite of thin grain structure, homogeneous, could be appropriate to raise the pace of feed, feed speed is too low, diamond blade may be easily even. Cutting coarse grain structure of soft and hard granite which is not all, should reduce entry speed, otherwise it will lead diamond saw blade vibration due to fragmentation reducing the interest rate of cutting. Feeding speed of sawing of granite in the 9m~12m/min range selected.
(3) cutting depth: wear of diamond cutting depth is involved, effective cutting, sawing stone saw blade force and nature of important parameters. Generally speaking, when a type of diamond buzz saw blades speed is high, should simply select the small depth of cut elimination, from current technology, depth with the cutting diamond could be selected among 1mm~10MM. Usually with a large diameter saw blade when cutting granite block, between cutting depth is usually controlled in 1mm~2mm, simultaneously reducing approach speed. If your line speed would be the larger of diamond circular saw blade, cutting depth needs to be selected. However , if sawing machine performance and the strength with the tool from the scope in the license, make an attempt for taking a bigger concentration cut cutting to enhance cutting efficiency. When on the surface individuals absolutely vital, you should employ small depth of cut.
Second, other influencing factors
(1) diamonds size: common inside scope of diamond grain size in 30/35~60/80. Steel solid, strongly advised to select an inferior size. Because under conditions of equal pressure, sharp diamonds as small as possible, to reduce into solid rock. Furthermore, generally requires high cutting efficiency of huge-diameter saw blade should decide on a coarser granularity; inefficient sawing small diameter saw blade, require rock cutting section smooth, use a finer granularity.
(2) power of Cutter: the so-called diamond concentration, refers to the diamond within the density matrix in the distribution. Enhances the power of diamond is predicted to increase the life span of saw blade, with the increased concentration which cuts down on the average force of each diamond. But increasing depth must increase the costs from the saw blade, so there exists a concentration of most economic, Cheng cutting rate increase plus the concentration increases.
(3) the hardness in the knife head bond: in the main, bond hardness higher, its greater effectiveness abrasion. Therefore, if you are cutting abrasive rocks, bond hardness ought to be high; when the saw when cutting material of soft rock, bond hardness should be low when cutting if your abrasive and hard rock, bond hardness should be moderate.
(4) effect and temperature effect and ground damage: technique of diamond buzz saw blades in cutting stone, go through centrifugal forces, such as sawing, sawing qiere alternating loads.