New development of the most popular replaceable cu

2022-08-14
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New development of replaceable cutting tools

it is recognized that drilling is the most widely used process in cutting, whether in machining centers, CNC lathes, or special drilling machines. Processing cost per hole, drilling quality and hole integrity are all key factors to be considered in the selection of drill bit and process. It is often possible to integrate some related machining processes such as reaming, chamfering, expanding drilling, boring, etc. into one tool, which can be easily completed together when drilling

the drill bit with replaceable drill point came out in the late 1990s. When the cemented carbide drill point on the drill bit is worn, it can be easily replaced without removing the tool body of the drill bit from the tool handle and/or machine tool spindle. Each steel cutter body can be applied to crowns with different diameters within a given size range. Users do not need to buy a drill of a specific size to drill holes of each diameter, which can save costs. Generally, the hole diameter range covered by the bit body is about 1mm, and the drill tip diameter increment provided by many tool suppliers is 0.10mm

the concept of replacing cemented carbide drill tips on the steel cutter body of drill bits has led to the development of replaceable head milling cutters and modular reaming systems, which have also achieved success and benefited users

replaceable drill tips have advantages in the following aspects:

(1) save a lot of processing operations and tool management costs

(2) reduce the cemented carbide materials used in the cutter body

(3) longer tool life and predictability of hole machining

(4) reduce bit inventory

(5) the fluidity of regrinding, returning and backup tools required for the drill bit is eliminated

(6) the tool loading time is greatly shortened, because the drill point is replaced on the machine tool and tool handle, and there is no need to pre adjust, compensate and set the tool

in order to correctly select the type of drill bit, it is necessary to correctly answer questions about drilling size, tolerance and surface finish requirements, as well as the economy of processing tasks or workshops. For the machining with aperture less than 12.7mm, considering the machining accuracy and machining performance, the integral cemented carbide bit is still the recommended solution; For machining (especially rough machining) with an aperture greater than 25mm, it is recommended to use indexable blade drills. When machining holes with an aperture larger than 25mm or even 51mm on high-power machine tools, the use of indexable blade drills is particularly effective

in the aperture range of 12 In the drilling process between 4mm, replaceable drill tips have become a common choice, because this kind of drill can provide a comprehensive and measurable competitive advantage with both precision drilling ability and cost-effectiveness. Cemented carbide drill tips have the characteristics of optimizing the shape design of drill tips according to the workpiece materials and processing requirements, and usually do not Regrind, so each drill tip replaced is new, and its processing performance is exactly the same as all other new drill tips, while the reground integral cemented carbide drill bits cannot do this

the top drill M1 modular drill bit newly developed by widia company under Kenner is in Within the standard aperture range of 99mm, it has both the economy of the modular drilling system and the processing performance and hole processing quality of the overall cemented carbide tool. It is suitable for hole processing with the length diameter ratio (L ∶ d) of 3D and 5D. The bit body can be equipped with either a flange shank (metric system) or a round shank (British system)

Chris Merlin of Kenner explained that tdm1 modular drill bit is a part of widia's newly launched victory product line. It is a clamping free and replaceable blade drilling system using fine grinding drill tips and fine grinding tool bodies. This non regrinding blade avoids the logistics and tool life problems caused by the use of regrinding blades

merlin said, "since there is no regrinding problem of the blade, the modular bit provides predictability of processing performance. Tdm1 bit allows users to avoid such a problem: in order to ensure regrinding performance, sometimes the tool must be changed before the regrinding bit reaches the maximum utilization rate."

modular tools such as tdm1 ensure the consistency of machining aperture through the consistency between replaceable blades. However, the diameter of the regrinding blade will be reduced due to the back cone. Of course, regrinding the blade will also change the length of the drill bit. When using tdm1 drill bit, it is no longer necessary to preset the tool length in the tool room, nor to carry the tool back and forth between the tool room and the machine tool, which reduces the programming time and the possibility of machine tool errors

tdm1 replaceable blade adopts k20f nitrogen aluminum titanium coating brand and UPM geometric design, which is characterized by the machining design of drill tip shape for steel and cast iron workpiece. The drill is aimed at the distributor market, and the design of the drill tip is very flexible. Only one type of drill needs to be prepared to meet the processing needs of 80% - 90%

Thomas sandrud of seco tools Inc. pointed out that the company's crownloc replaceable drill point bits have been widely used in aerospace, power generation, automotive and medical industries. The drill has three geometries optimized for the processing of steel, stainless steel, heat-resistant alloy and cast iron. For the processing of different materials, the same cutter body can be used, and only the drill tip needs to be replaced

the safety of crownloc drill point on the cutter body is ensured by internal fastening, that is, the drill point is tightened or screwed on a pull rod, and the pull rod locks the drill point on the interlocking V-shaped groove tooth surface of the cutter body. Crownloc drills can be used to machine diameters 99mm hole

Sandrud said that the processability of crownloc replaceable drill point bit is close to that of integral cemented carbide bit, and it can be used as finishing tool for many times. The maximum hole depth that the standard crownloc drill can process is 7d. In order to meet the requirements of processing deeper holes today, shangao company can also customize crownloc drills with a hole depth of 10d

Bradley tees, vice president of iscar metals Inc, "The consequences of bit failure are always very serious. Our sumochamdrill (beam magic chameleon bit) is the third generation product developed after chamdrill and chamdrilljet replaceable drill point bits. The improved drill point and cutterbed enable the bit to rotate 50 times, and its tool life is twice that of the first generation product.

teets said, "Sumochamdrill is characterized by four different standard drill point geometries, sharp cutting edges and smooth chip removal grooves. The polished chip removal grooves on the drill point enable the chips to flow smoothly and continuously, and the finely ground grooves have better drilling performance." The drill is characterized by an indexable drill point with a spiral coolant nozzle. For the processing of various materials, different drill point geometries can be used. Sumochamdrill can be used in milling centers or lathes

sumochamdrill's tool handle design is based on German standard DIN 9766, and the applicable drilling depth is: length diameter ratio from 1.5D, 3D, 5D to 8D. Spiral coolant holes are arranged in the drill body. Teets said, "the precision cylinder added to the locking part improves the rigidity of the tool and reduces the internal stress. The precisely ground stop plane on the tool improves the control of the positioning and support of the drill tip. In order to prevent the blade from being thrown out during the drilling process, an axial stopper is also set on the tool base, which can effectively limit the blade movement even when the clamping force is lost."

Sumitomo Electric carbide Inc. has launched SMD series replaceable drill point drills. Users can buy a tool body, which can be adapted to five diameter sizes of tool heads, and each size of tool head has three types of drill points for processing different materials: smdt-mtl tool head is used for processing steel parts, while the chamfered cutting edge of smdt-c tool head can avoid edge collapse when processing cast iron. Smdt-mel is designed for processing heat-resistant alloy, stainless steel and cast iron

the specification of SMD bit body series is expanded from the original 3D and 5D (length diameter ratio) to 8D. Rich maton said, "it is said that the nickel plated tool body of SMD provides longer tool life than the traditional replaceable drill bit tool body. The rigid cogging connection system ensures the stability of the drill tip, and the cemented carbide matrix of the drill tip combined with Sumitomo ZX coating provides good wear resistance." The machining diameter range of SMD drill is 5mm, suitable for production workshops processing various workpiece materials, as well as parts processing workshops in automotive, aerospace and petroleum industries

Xtra Tec point drills produced by Walter USA Inc. have replaceable drill tips optimized for different materials, which are used to process steel parts (p6001), cast iron (p6002), stainless steel, ductile iron and difficult to machine materials (p6003), aluminum and aluminum alloys (p6004), as well as deep holes (b4010) with a length diameter ratio of 10d on steel, cast iron, stainless steel and difficult to machine materials

the design of replaceable drill point matches with its processing object. For example, p6003 adopts optimized geometry and new coatings for processing various stainless steel and long chip steel parts in general machinery, energy and aviation industries. P6004 adopts sharp cutting edges and new coatings for processing aluminum parts and aluminum alloys containing silicon (or without silicon) in general machinery, automotive and aviation industries. B4010 adopts an internal cooling design, which can cool the cutting edge and assist in discharging chips that cannot be produced according to the traditional range method, and can process deep holes with a length diameter ratio of 10d. The hard nickel coating improves the chip removal performance of the drill bit and can prevent corrosion. It is suitable for the processing of general machinery, energy and aviation industries

gen3sys replaceable drill point designed and developed by Allied machine and Engineering Corp. confirms the technical state and accuracy of the experimental machine according to the difference of the comparison value. The high-strength drill bit can maximize the processing time of the machine tool and reduce the valuable tool loading time. The company said that compared with similar products, the drill bit can improve the drilling quality, surface finish and positioning accuracy. Gen3sys drill bit was coated with am200 coating of the company; The diameter range of initial products is mm, and spiral groove or straight groove drill can be selected; The length diameter ratio of the bit is 3D, 5D and 7d; C1 and C2 base grades can be selected

at Ingersoll cutting tools, the concept of replaceable drill tips or heads has been applied to three types of cutting tools, including QWIK twist replaceable drill tips series, QWIK ream replaceable reamers and chip surfer milling cutter series

QWIK twist series bits solve the problem that the number of bits usually varies when using solid carbide bits. Bob Jennings of Ingersoll explained, "In production and processing, we found that users can better manage the processing process by quickly changing the tools on the machine tool: there is no need to remove the tool collet and tools, there is no need to readjust the tool, Z axis and contact with the workpiece, just replace the drill tip. In unattended processing, once the tool life is determined, the machine tool can be set and run according to the expected life of the tool. Therefore, the tools used for unattended processing should Have the same tip, the same geometry, the same cutting edge preparation, and the same coating. "

in high-speed reaming, Ingersoll's QWIK ream interchangeable reamer is suitable for commonly used small-scale machining, as well as special, coated, brazed PCD or CBN reamers for reaming difficult machining materials. The processing size range is 12 mm。 Michael Butler of Ingersoll explained, "this reamer can be used in machining centers or CNC lathes to give full play to the advantages of high-performance coatings and substrates. We hope to adopt internal cooling because

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