222results about How to "Improve Chip Evacuation" patented technology

A spade drill bit has a shaft and a spade head portion arranged on the shaft. The head portion has a rearward facing bottom edge, two longitudinal sides and a forward facing cutting edge. The cutting edge has a pointed, generally triangularly shaped tip and outer ends. The longitudinal sides of the head portion are bent along a bend in a direction of rotation of the drill bit during operation, so that the outer ends are bent forwards in the rotating direction. The bend runs from a first position at one of the longitudinal sides, closer to the bottom edge than to the cutting edge, and to a second position at the cutting edge between the outer end and the tip.

The invention discloses an anu milling cutter electrical sparkle process method and the special electrode, which belongs to the anu process filed. The method is characterized in that: the invention adopts formed anu opening groove round plate electrode, which utilizes high speed main axle to drive the anu opening groove round plate electrode rotate, process a cutter and a cutting blade of the anu milling cutter by the method of discharging milling way at the rotating outer edge; wherein, according to the diameter and length of the cutter of the anu milling cutter, ensure the discharge index of electrical sparkle process. The process method in the invention is simple, which can change the structure of the cutter conveniently, and achieve small diameter of the cutter, at the same time, the process surface has good quality and high material removing rate, the manufacture cost of the cutter is low.

The invention discloses a miniature PVD coat miller cutter for PCB, and a making method thereof. The miniature PVD coat miller cutter for PCB comprises a substrate and one or more layers of a hard and wear-resistant coat deposited on the substrate through a physical vapor deposition process; the hard and wear-resistant coat is an MeCxNyOz coat, Me is one or more of Al, Cr, Ti, Zr, Si, Hf, Nb, Ni, W, Ta, B, V, Y and Cu, and x+y+z is 1; and the total thickness of the one or more layers of the coat on the substrate is 0.1-10mum. The substrate is made by using a cemented carbide material, a ceramet material, a ceramic material, a cubic boron nitride based material or a high-speed steel material. By improving the structure of the PVD coat in the invention, a processing problem that printed circuit boards are difficult to process is overcome, and a problem that the service life of a common miniature milling cutter is short is prolonged.

The invention discloses a manufacturing method of an electroplated grinding wheel of an ordered structure. The method includes: adopting a pulse laser beam to process a fine spiral groove with the pitch of hundreds of micrometers and the notch size of dozens of micrometers in the working surface of the outer annulus of a grinding wheel base body made of metal, filling the groove with epoxy resin, and enabling the metal and the epoxy resin on the working surface of the outer annulus of the grinding wheel base body to be in spiral regularly-spaced layout; then electroplating the working surface of the outer annulus of the grinding wheel base body with abrasive grains by adopting an electroplating method. Since the groove is filled with the non-conductive epoxy resin, the region cannot be electroplated with the abrasive grains. By the steps, the electroplated grinding wheel with the abrasive grain layer and the epoxy resin being in spiral regularly-spaced layout can be obtained. The manufactured electroplated grinding wheel of the ordered structure is in favor of solving the problems that the grinding wheel is blocked easily during grinding and grinding fluid cannot enter the grinding region easily, workpieces can be prevented from being burnt, and the grinding quality is improved.

The invention discloses a CVD diamond grinding wheel with an ordered micro-structured surface and a making method thereof. The grinding wheel is characterized in that a layer of diamond film is deposited on the outer circumferential face of a grinding wheel hub, a large number of staggered in-order micro grinding units are machined on the whole outer circumferential face of the diamond film, and the top ends of the grinding units are in kidney shapes. The making method is characterized in that through the chemical vapor deposition that is CVD, the diamond film is deposited on the outer circumference face of the grinding wheel hub, a pulse laser beam is adopted to machine the large number of micro grooves with the same geometric dimensioning in the outer circumference face of the whole diamond film, and the large number of micro grinding units are formed; the grinding units are arranged in a staggered and in-order manner, the top face of each grinding unit is in a kidney shape, according to the grinding wheel, the effective sharpening number of the grinding wheel during grinding can be improved, the chip formation efficiency and the surface material removal rate are improved, the cutting performance is improved, the surface machining quality and the cutting efficiency can be improved, the holding force of the grinding wheel hub to the grinding units can be increased, and the service life of the grinding wheel can be obviously prolonged.

The invention discloses an ultrasonic vibration pneumatic drill based on rotary type wireless electric power transmission. The ultrasonic vibration pneumatic drill comprises a rotary wireless electric power transmission assembly, an ultrasonic transduction assembly, an amplitude-change pole, a spring chuck assembly and a connecting assembly, wherein the rotary wireless electric power transmission assembly is used for realizing electric power transmission between two mechanisms rotating oppositely and comprises a wireless electric power transmission primary unit and a wireless electric power transmission secondary unit; the ultrasonic transduction assembly is used for converting ultrasonic-frequency electric signals into ultrasonic-frequency mechanical vibration; the ultrasonic vibration amplitude-change pole is used for amplifying small-amplitude mechanical vibration into large-amplitude mechanical vibration to meet requirements of ultrasonic vibration drilling machining; the spring chuck assembly is used for clamping tools; the connecting assembly is used for connecting ultrasonic vibration drilling parts with the rear end of the pneumatic drill so as to realize power transfer and electric power transmission. Ultrasonic vibration is applied to the traditional drilling machining process, and a combined machining mode of coupling of ultrasonic vibration and traditional drilling motion is formed, so that machining quality is effectively improved and machining efficiency is improved.

The invention belongs to the field of milling cutters, in particular to a minitype diamond-tooth milling cutter which is used for processing the minitype slotted hole of a multilayer printed wiring board, and a processing technology thereof. On the basis of the prior art, a step of semi-accurately cutting a spiral groove is added in the processing technology, and thus the cutting mill with the minimum external diameter can be favorably processed. The invention also provides a minitype diamond-tooth milling cutter which is suitable for processing the minitype slotted hole of the multilayer printed wiring board; the helical angles of the left spiral groove and the left spiral groove are respectively 18-22 degrees; and the external diameter phi d of the head of the milling cutter is 0.4-0.7mm. Under the condition that the external diameter of the milling cutter is smaller, a proper spiral angle is chosen; force borne by the head of the milling cutter is reduced while chip removal space is reasonably designed; the phenomenon of excessive wearing or'snapping' because force borne by the head of the milling cutter is too big is avoided; and the milling cutter still has bigger milling strength. The minitype diamond-tooth milling cutter and the processing technology thereof can be used for processing minitype slotted holes.

A separate-regulatable powder-boosting type drilling chip extracting device for ejection drill is composed of oil delivering unit and drilling chip extractor. The sealed oil tanks for the said oil delivering unit and drilling chip extractor are respectively connected to the oil trank of oil pump via their branch pipes with throttle valves. Regulating of throttle valves can make the device be in optimal state to extract the drilling chip.

The invention belongs to the field of combined micro-machining and relates to an ultrasonic vibration auxiliary micro-electrochemical electrical discharge wire-cutting machining method and device for non-conductive hard and brittle material machining. The machining method comprises the steps that ultrasonic vibration is utilized for exciting a workpiece in the axial direction of an electrode wire, the electrode wire and an auxiliary electrode are subjected to an electrolytic reaction in an electrolytic solution so that hydrogen gas is separated out around the electrode wire, and then a gas film is formed so that the electrode wire and the electrolytic solution can be insulated. The machining device comprises a machine tool bed, an electrolysis-electrical discharge wire cutting device, an ultrasonic vibration unit and a workbench. A wire storage cylinder, a driving wheel, a tensioning device and a guide wheel support are arranged on the machine tool bed. The electrolysis-electrical discharge wire cutting device comprises a clamping device for fixing the workpiece, the workpiece, a main shaft, a wire driving device, the electrode wire, a working solution box containing the electrolytic solution, an auxiliary electrode and an electrolysis-electrical discharge power source. The auxiliary electrode is connected with a positive electrode of the electrolysis-electrical discharge power source. The electrode wire is connected with a negative electrode through an external wire feeding device. According to the method and device, implementation is easy, the production cost is lowered while the precision and efficiency are ensured, and the method and device can be widely applied to micro-machining of various non-conductive hard and brittle materials.

The invention discloses a helically and orderly arranged fiber cutter capable of positive rake angle processing and a preparation method thereof. The fiber cutter includes fiber, carcass and steel matrix; the fiber is tangent to the base circle in the steel matrix, and the fiber can process the workpiece with a positive rake angle during cutting; Arranged in an orderly manner. The preparation method is as follows: the fiber is prepared by wire electric discharge cutting technology; the series of fibers are clamped and sharpened by special clamps; the matrix is ​​prepared on the prefabricated steel base by pressing and sintering technology; A series of small holes arranged in a helical line are processed on the body; epoxy resin is injected into the small holes, the fibers are inserted into the small holes, and the embracing device is used to ensure that the blade height of the fibers is consistent; the fiber cutter is prepared by heating and curing. The helical and orderly arranged fiber cutter prepared by the invention can realize positive rake angle processing, significantly reduce cutting force and cutting temperature, and improve cutting performance.

The invention discloses a drilling fixture, which comprises a fixture body, a guide and a bushing. The fixture body is provided with a mounting hole, the guide is arranged in the mounting hole, the bushing is arranged between the fixture body and the guide, the guide and the bushing are provided with communicated chip discharge holes, the fixture body is provided with a chip containing groove which is communicated with the chip discharge holes, and a baffle is arranged at the outer end of the chip containing groove through a fastener and provided with a blowing device. When drillings generated during drilling enter the guide along with a drill, the drillings can be sucked into the chip containing groove by the blowing device through the chip discharge holes, so that chip discharging performance is improved, jamming of the drill into the guide due to untimely chip discharging can be avoided, and abrasion of the fixture body caused by the fact that the guide and the bushing are driven by the jammed drill to rotate together is avoided. The service life and the replacement cycle of the drilling fixture are prolonged, and production cost is reduced. Further, the baffle is arranged at the outer end of the chip containing groove through the fastener, and the drillings sucked in the chip containing groove can be cleaned by demounting the baffle, so that maintenance is convenient.

The invention discloses a super-hard wear-resisting chromium-based compound coating micro drill bit for a PCB (Printed Circuit Board) and a preparation method thereof. An inner layer and an outer layer are respectively deposited on a hard alloy substrate by adopting an ion plating technology and improved magnetic filtering ion plating; the inner layer is a CrN transition layer and is combined with the hard alloy substrate to have very good calorific, hardness and chemical matching properties, so that the good bonding strength between the CrN transition layer and the substrate is guaranteed; and the outer layer is an AlCrTiN compound layer and has the characteristics of high hardness, strong toughness and low friction coefficient. A PCB micro drill bit of a compound coating, which has the advantages of strong bonding strength, high hardness, good toughness and low friction coefficient, is obtained by carrying out compound design on CrN and AlCrTiN and utilizing interface strengthening, solid solution strengthening, double-phase strengthening and nano strengthening.

The invention relates to auxiliary equipment of numerical control machine tools, in particular to a chip tracking type automatic telescopic chip remover. The chip remover comprises a bracket, a module, a control electric cabinet and a chip removing system, wherein the module is transversely mounted on the bracket; the control electric cabinet is mounted on the bracket, is positioned on the side surface of the module, and is used for controlling the module and the chip removing system; and the chip removing system is mounted on the module. The chip remover can wind a lot of thread-shaped chips on chip winding keys, and in particular, is better in chip removing effect of iron thread-shaped chips through attraction force of magnets in the chip winding keys; and the chip winding keys rotating at a high speed enable the chip removing capacity to be greatly enhanced. The chip remover fits a numerical control lathe generating the thread-shaped chips, to realize full automation of production and chip removal, so that manual chip removal is not needed, the production efficiency is greatly improved, and the labor intensity and the danger are reduced.

The invention relates to the technical field of impeller machining, in particular to a closed impeller electric spark machining device and machining method. The closed impeller electric spark machining device comprises an impeller installation fixture for installing a closed impeller to be machined, a pre-machining electrode installation fixture and a plurality of pre-machining electrodes; the impeller installation fixture is provided with an installation shaft, the closed impeller to be machined is provided with a center positioning hole, and the closed impeller to be machined sleeves the installation shaft through the center positioning hole; the electrode installation fixture comprises a first electrode installation seat, the multiple pre-machining electrodes are all connected with the first electrode installation seat and arranged circumferentially, and the number of the pre-machining electrodes is the same as that of flow channels of the closed impeller to be machined; in the machining process, each pre-machining electrode corresponds to a flow channel inlet of the closed impeller to be machined; and the closed impeller electric spark machining device furthermore comprises a first drive mechanism for driving the electrode installation fixture to perform straight line movement in the Z-axis direction, and the Z axis is the extension direction of the installation shaft. By means of the closed impeller electric spark machining device and machining method, machining efficiency is improved, and machining precision is guaranteed.

The invention provides a cutting tool covered with diamond. The tool substrate composed of tungsten carbide cemented carbide or titanium carbonitride base metallic ceramics is covered with a crystal diamond layer. Nanometer diamond film having average grain diameters of 1 to 50 nm and laminated alternatively at a lamination space of 0.2 to 2.0 micrometers and alternating lamination films of crystal diamond film having average grain diameters of 0.1 to 2 micrometers cover the crystal diamond layer. The shortest distance between the front end of a cutting blade to the crystal diamond layer is determined to be 3 to 15 micrometers. And a non-crystal carbon film having surface roughness less than 0.1 micrometer and thickness of 10 to 200 micrometers is formed on the surface layer of a front blade face of the nanometer diamond layer of the cutting blade.

The invention discloses a formula for manufacturing of a blank body of a combined saw blade tip used for cutting black bricks and red bricks and relates to the field of diamond saw blades. According to the formula, the blank body is formed by mixing diamond and metal powder and is characterized in that the concentration of the diamond is 20-35%, and the metal powder is prepared from the following components of, by weight, 25-50% of iron-copper-tin alloy powder, 15-30% of copper powder, 2-6% of tin powder, 5-15% of nickel powder, 2-10% of cobalt powder, 2-5% of 663 bronze powder and the balance iron powder in proportion. When the multiple saw blades manufactured according to the formula are used in a combined mode, the cutting speed is high, the cutting effect is good, and the problems that an existing saw blade is prone to breaking bricks during cutting, and the service life is short are solved.

The invention discloses a high-efficiency cutting grinding wheel comprising a base body and a grinding ring. Water outlets are hollowed on the grinding surface of the grinding ring and communicated with water flow passageways correspondingly arranged in the base body; the water flow passageways are converged at water inlets arranged on the base body; in the circular arc length range randomly set on the grinding surface, the number of the water outlets is more than 0 and less than 30, and the circular arc length set randomly is one to three times of a contact line between the grinding ring and a workpiece when the workpiece to be processed is ground; and the base body comprises two layers of substrates, the grinding ring is clamped and fixedly connected between the substrates, a water storage area playing the role of the water flow passageway is formed between the substrates, and the water inlets are ring ports arranged on the substrates. Enough water outlets are arranged so that the cuttings generated in a grinding processing area can be discharged rapidly, the surface roughness of a surface to be processed and the sharpness of the grinding wheel can be improved substantially, the grinding wheel can be ensured to be suitable for the rapid and high-speed process, and the production efficiency is improved.