Drill maintenance2017-07-04
⒈ When drilling steel, please ensure adequate cooling and use metal cutting fluid.
⒉ good drill pipe steel and rail clearance can improve the accuracy of drilling ♦and drill life
⒊ Please ensure that the magnetic seat and the workpiece betwee♦n the smooth and clean.
⒋ drill sheet, to the workpiece reinforcement, drilli÷ng large parts, please ensure that the workpiece is stable.
⒌ at the beginning and end of the drilling, the feed should be reduced by 1/3≠.
⒍ on the drilling when there are a lot of fine powder mater€ial, such as cast iron, cast copper, etc., can not use the coolant, and the ÷use of compressed air to help chip removal.
⒎ Please promptly remove the iron filings wound on the drill body to ensure smooth chip removal.
twist drill2017-07-03
Successful Application of PCD Direct Sintering Technology2017-07-03
In recent years, composite tool drilling tools, the most dis↓cussed tool innovation is PCD direct suppression sintering technology. To understand this concept, first of all need to ✘understand the PCD and its previous limitations. In general, PCD is attached€ to the cemented carbide layer. When the cutting tool is made, the PCD is welded ★to the tool body by brazing.
This method has two major shortcomings: 1. Tool groove processing is limite↓d, because it is made of flat film; 2. The flat sheet wel↑ded to the cutting edge of the tool from the cutting edge is very close. If the temperature is clo÷se to the melting point of the brazing, then the heat generate'd during processing will cause the welded joint to fail.
Strategic Positioning
In order to overcome these shortcomings, and make full use of t&he advantages of PCD, PCD material using direct compression sintering technology, from the strateg£ic focus on manufacturing PCD tool blank. When the cutter is made, the diamond powder ✔is put into the slot opened in the carbide tool cutter body, and th₽e diamond and the cemented carbide are sintered at high temperature and high pressure. The <sintered tool blank is welded by brazing On the handle. And ult≥imately in accordance with the requirements of the blade shap★e design, precision tool blade processing.
For the processing plant, this is a good news, because the• characteristics of sintering PCD, can make the tool in the positioning of the PCD blade ≥accurately. In addition, the spiral cutting edge or ot≥her complex blade type can be precisely made, which can not be achieve d when using a PCD sheet. This optimized blade shape can be adapt ed to less rigid settings, but also to adapt to precision and stable mass processing. PCD direct suppression of sintering technology, but also to solv•e the problem of failure of the brazing joint. It is true that direc↕t pressing of sintered knives still has brazed joints - this is only located above the↔ shank side, away from the cutting site, free from heat.
Special tool blade type
In general, PCD direct suppression of sintered knives has a sharp cutting edge ty pe, even in the processing of abrasive wear resistance of the largest composite material, but ≤also to maintain a sharp edge. This technique can e ven be further enhanced, for example, by strengthening the fillet portion of the tool to increaλse the cutting speed without affecting the surface quality or dimensional tolerances.
For the processing of composite materials and metal laminated materials,♦ PCD direct compression sintering tool can be used micro-grinding tech nology, in order to process high stress concentration, but also help to maintain the sharpnλess and extend tool life. Tool sharp cutting edge cutting synthe÷tic fibers, the required thrust is small, can be processing defects (such as ≤delamination, substrate melting / softening, fiber extraction an✔d surface scorching) to a minimum.
Core driving force
Composite materials and parts processing technology, the∞ hole processing continues to dominate. For example, in the aerospace industry≠, it takes a lot of time to prepare fasteners for composite r÷acks and parts. Even with the latest unified structure that reduce≥s assembly requirements, drilling is still the dominant factor in terms of processing efficiency and cost.
PCD drill bit with direct compression sintering technolog♥y, cutting edge can be made into a variety of groove, the hole into the hole position to minimize the tendency, but the application method ★is still a major factor in tool selection. For example, when using the automatic →feed device, the PCD directly suppresses the sintered bit (eg 85 or φ86 PT series CD10) and uses the PCD blade protection design tδo increase the stability of the process. At this poi<nt, in the cutting tool PCD edge part of the added protective layer, 'shortening the PCD exposed part of the total length. This pr•events the cutting edge from cracking, thereby extending ↑the tool life. These drills can also be used in the i✘nternal cooling mode, which is particularly recommended for the processing of γaluminum alloy and / or titanium alloy stack of composite materials.
Drilling once
In order to shorten the downtime and to improve the surface quality and aperture err↕or of the CFRP (carbon fiber reinforced plastic) or CFRP / metal ≥stacking material, it is important to use the direct compression sintering technology to optimiz™e the drill tip configuration PCD drill bits and optimize the machining process of. Although it is desirable to use a one-time drilling toσol to shorten the production time, two times or three operations, drilling, drilling and reaming, a re required for drilling when high accuracy is requi→red.
PCD direct suppression sintering tool is not only used for ho₽le processing, can also be used for surface processing and edge processing processes. A ty☆pical example is the vertical tail of the aircraft made of composite material, which is di≈fficult to process at the edges of this material. However, CoroMill® Pluφra end mills with PCD direct sintering technology are best suited for™ this process, reducing fiber fragmentation and increasing metal reβmoval.
From the perspective of composite material processing capacity and cost reduction, PCD direct sintering technology is undoubtedly the biggest technical driving for∞ce, for all applications, have great potential and competitive a>dvantage
PDC bit, cone bit use precautions2017-07-02
According to the bit body material classification
1, carcass PDC drill bit
Carbide Diamond Composite (PDC) A drill bit is a type →of cutting drill that welds a diamond composite sheet by brazing on the drill body. The £carcass bit is sintered with tungsten carbide powder and brazed with tungsten ©carbide carcass on the polycrystalline diamond com§posite sheet with natural diamond.
2, steel type PDC drill bit
Steel body PDC bit, is nickel, chromium, molybdenum alloy machining forming. After the hea÷t treatment in the drill body on the drilling, strong man-made polycrystalline diamond σcomposite sheet into the (tight fit) drill body, with cyl♣indrical tungsten carbide path.
According to applicable industry classification
1, Geological exploration with a composite drill bit is mainly used for geological exploration ₽and exploration of composite chip bit, suitable for soft to medium hard rock, a₽nd now some manufacturers of new research and development of new composit₩e film can be applied to ten hardness of the rock.
2, coal field drilling with composite chip bit is mainly used for coa×l mine drilling and excavation. Generally speaking, the rock formation is relatively soft, the ♦composite bit is widely used, such as anchor bit, three-wing drill andγ so on.
3, oil exploration with a composite bit is mainly used in oil and gas drilling★ drill bit. At present, the oil field with a composite bit is all the composite drill bit •inside the highest cost, the highest requirements. Can be said that the composite chip© inside the arsenal bit.
Drill use precautions
Do not hit the cone bit when replacing the dril l bit.
To keep the mud clean, to prevent blocking drill bit water, and affect the u"se of drill bit. C, drill down control speed, to prevent sudden resistance, so that the co↓ne bit to play a better effect.
Keep two pumps on the water well. E, keep the bot©tom of the net without falling objects, from the drill, drilling are equipped with scraper or ste©el plate to cover the wellhead, often check the jaw insurance pin and₽ wellhead tools to prevent the wellhead fall.
Pay attention to the drill, to prevent drilling, drilling.
Encountered a bad drill, jump drilling time to ad₹just the drilling parameters.
Cone bit drill in the end, the first cycle of abo↑ut ten minutes, with 1-2 tons drilling about 0.5 meters§, slowly pressurized to 6-8 tons drilling. Drill evenly, to prevent the sudden damage to the teeth, drilling pressure is generally not more than 10 t✘ons. Encountered when drilling slow, to analyze, if it is because of the reasons for the sa&ndwich should be patient, do not blindly add pressure.
Hardware hand tools industry how to develop2017-07-01
China's hardware tools are widely used in geological exploration, stone, mach→inery, automobile and defense industry and other fields, mechanic₹al processing with abrasive, geological drill and stone sawinλg tool manufacturing technology level has been greatly improved. Pr∏oducts have formed a series, standardization, variety specifications complete, product βquality and stability, some products in the international market has a certain competiti★veness.
Although China's production of various diamond tools in various industries are wi∑dely used, and achieved significant economic benefits, but← its technical level and foreign similar products, there> are still some gaps, and vigorously develop the hardware tool indu©stry, pay close attention to new products, new Technolog↔y development, accelerate the development of China"'s hardware industry, improve economic efficiency an÷d overall technical level. The specific approach is:
Increase investment in the tool industry, pay close attention to the development of new producσts and new technologies, new technology promotion, and constantly expand the field of¶ diamond applications, improve the diamond tool industry, the overall level of technology andλ market competitiveness, variety, quality of survival, scientific and technoεlogical progress Seeking development.
To meet the needs of domestic and foreign tool market, we must speed up the development of new ÷products, improve product quality, increase varieties, increase prod>uction. In recent years, the demand for diamond tools has increased ye₩ar by year in the field of processing of machinery, precious stones, medical equipment, wood, f¥iberglass, stone handicrafts, ceramics and composite non-metal↔lic hard and brittle materials. At present, these products are still dependent $on imports. Developed a variety of high-quality series of tools to replace imports. A t present, the urgent need to develop products: oil drilling with PDC bit, stone grinding with♠ diamond grinding blocks, engineering thin-walled drill, diamond honing Whetstone, diamond fi"lm coating tools, diamond wheel, rubber binder diamond plastic tools, PC♠D diamond tools , Diamond needle, nozzle, diamond heat sink and €transistor and other products. To ensure the quality of the€ir products, we must speed up the promotion of new techno↔logies and new technologies, such as vacuum welding technology, EDM sintering technology, diamon&d uniform technology, diamond plating iridium technology and metallization bond<ing technology, laser welding process.
Strengthen internal management, and constantly improve λthe production process, reduce production costs and i↔mprove economic efficiency.
Take the road of group or joint enterprise, set up several large enterprise groups$, guide the development of the industry, create their own brand, and actively particγipate in international competition. Relying on scientific and technological progress, i↔ncrease investment in science and technology, update equipment, pay close attention to new₹ technologies, new technology, new product research and promotion, improve the technical leve✔l of China's hardware industry.
