135results about How to "Reduce cutting heat" patented technology

The invention provides an atmospheric cold plasma jet auxiliary cutting method. Cold plasma jet generated under atmospheric pressure is used as a lubricating cooling medium during material cutting. Working gas enters a cold plasma jet generator from a working gas source via a pressure reducing valve and an adjustable flow meter, the flow of the working gas and output voltage of a high-voltage power source are adjusted so that uniform cold plasma jet is sprayed out from a nozzle outlet of the cold plasma jet generator, the temperature of the jet is the room temperature or is slightly higher than the room temperature, and a tool and workpiece interface and a tool and chip interface are always soak in the cold plasma jet during cutting by means of adjusting a spraying angle. Plasma can be generated in a dielectric barrier discharge mode, a suspension electrode discharge mode or a bare electrode discharge mode. The atmospheric cold plasma jet auxiliary cutting method is an environment-friendly cutting method, an excellent lubricating and cooling effects for various metal and nonmetal materials can be realized during cutting, accordingly, cutting force is reduced, the service life of a tool is prolonged, and the quality of the surface of a workpiece is enhanced.

The invention provides a turning method. The method comprises the following step: turning the outer surface of a niobium alloy target material or a niobium alloy target material by adopting a turning tool, wherein the front angle of the turning tool is 20-40 degrees, the rear angle is 4-15 degrees, the main deflection angle is 45-60 degrees, the auxiliary deflection angle is 45-90 degrees, and the blade inclination angle is 10-25 degrees. By selecting the front angle, rear angle, main deflection angle, auxiliary deflection angle and blade inclination angle of the turning tool, cuttings can be discharged from processed surfaces, so that the cuttings are prevented from sticking to the tool, and the cutting difficulty is lowered. The invention further provides a turning tool. The front angle of the turning tool is 20-40 degrees, the rear angle is 4-15 degrees, the main deflection angle is 45-60 degrees, the auxiliary deflection angle is 45-90 degrees, and the blade inclination angle is 10-25 degrees.

The invention relates to a production method of a brazed diamond wire saw, comprising the following process steps: 1. a steel wire enters a vessel stored with paste solder; 2. the steel wire adhered with solder enters a first wire-drawing die to facilitate the steel wire passing through the first wire-drawing die to be evenly coated with a layer of solder; 3. the steel wire adhered with solder enters a sealed dust box which contains diamond powder with diameter being 20-30 mum, a blower device blows the diamond fine powder, and the steel wire adhered with solder is evenly coated with a layer of diamond powder after passing through the dust box; 4. the steel wire adhered with solder enters a second wire-drawing die and is evenly and tightly coated with a layer of diamond powder; 5. the steel wire adhered with solder enters the center of a coil of high frequency induction welding, the solder melts down instantly, and diamond and the wire are fixedly and metallurgically bonded; and 6. a roll-up wheel evenly winds the finished diamond wire by welding. The method of the invention has quick production speed, and the prepared brazed diamond wire saw has long service life.

The invention discloses a tool provided with cutting chip flow guiding capillaries and functions and a machining method of the tool, relates to the tool in which the flow guiding capillaries are formed initiatively at the bottoms of cutting chips, and belongs to the field of mechanical manufacturing. The tool is characterized in that a texture array is arranged on the surface (1), on one side of the flowing direction of the cutting chips, of the tool; the texture array is formed by combination of micro-bulge (6) arrays and micro-groove (2) arrays; and the micro-bulge (6) arrays and the micro-groove (2) arrays are sequentially arranged along the flowing direction of the cutting chips. According to the tool, when a wet cutting machining mode is adopted, the direction of pouring or spraying is aligned with the direction of the capillaries or micro-grooves. Friction between the tool and the cutting chips is reduced; and cutting fluid reaches a bonding zone and a sliding zone, so that cutting force and cutting heat are lowered, and the service life of the tool is prolonged.

The invention discloses a cutting blade with an improved coating structure and a manufacturing method of the cutting blade. The cutting blade comprises a matrix A and a coating deposited on the matrix A. The coating is a multi-layer coating and at least comprises an inner layer C and an outer layer D. The inner layer C is composed of carbon-nitrogen oxide of transition elements of the IV B group or carbonitride of transition elements of the IV B group. The outer layer D is a (TiaAlb)(CiNjOk) layer, the thickness of the outer layer D is 1-20 [mu]m. Both the inner layer C and the outer layer D are of face-centered cubic structures. The manufacturing method comprises the steps of manufacturing the matrix A, selectively depositing a transition layer B, depositing the inner layer C, selectively depositing a transition layer E, depositing the outer layer D, and conducting surface treatment. The cutting blade is good in tenacity, abrasion resistance and oxidation resistance, the cutting blade has excellent cutting performance in machining of materials such as steel and stainless steel, and the manufacturing method is simple, convenient to implement, and easy to operate and control.

The invention discloses a planetary milling cutter, which is mainly applied to high-efficiency milling for planes during machining. The planetary milling cutter comprises a main shaft box 1, a rotating main shaft 2, a positioning central shaft 3, fastening screws 4, a central bracket 5, bracket bolts 6, circular nuts 7, branch milling cutter shafts 8, planetary sleeve shafts 9, gland screws 10, bearing glands 11, oil seals 12, bearings 13, a rotating cutter disk 14, bracket inner oil seals 15, bolts 16, cover boards 17 and bracket outer oil seals 18, wherein the rotating cutter disk 14 rotates continuously under the driving of the rotating main shaft 2 which rotates continuously; the branch milling cutter shafts 8 rotate around the axis of the rotating main shaft 2 and also rotate around the respective axes; and the rotating machining motion of the planetary milling cutter is synthesized by the rotating motion of the rotating cutter disk 14 and the rotating motions of the branch milling cutter shafts 8. According to the planetary milling cutter, cutting force can be effectively reduced, cutting heat can be reduced, the durability of the cutter is improved, and the plane milling efficiency is improved.

The invention related to a compound milling cutter for machining a fir tree type blade root wheel groove, which belongs to the technical field of machinery manufacture. The compound milling cutter comprises a shank part and a cutting part, wherein the tail end of the shank part is fixed with the cutting part, and a spiral groove and a cutting edge are arranged on the cutting part; the spiral groove is spirally arranged on the cutting edge, and a spiral angle is greater than 5 DEG but less than 10 DEG. In the invention, a V-shaped rough milling cutter, a deepen milling cutter and a semi-finish cutter in an original process are combined through optimum design of the cutting edge, rough machining and semi-finish machining of a supercritical steam turbine of 1000MW are completed, tooling and cutter changing time is reduced, and the cutting speed and the feed rate are increased so that the productivity is improved, and the production cost is reduced.

The invention relates to a stream turbine rotor blade root arc groove roughing milling cutter comprising a cylindrical cutter body, wherein the upper end face of the cutter body in the same circumference is provided a plurality of blade bearings at intervals on which end face cutting blades are arranged; one of the end face cutting blades of any two adjacent blade bearings is arranged on the outer side face of the blade bearing fixed with the end face cutting blade, and the other one of the end face cutting blades is arranged on the inner side face of the blade bearing fixed with the end face cutting blade; the outer periphery and the inner periphery of the cuter body are provided with a plurality with steps symmetrically from top to bottom, wherein the radius of the steps on the outer periphery from top to bottom increases by effect, the periphery of the steps on the inner periphery and the outer periphery is provided with a plurality of cuttings chutes which are sunken towards the wall surface of the cutter body, and the root parts of the cuttings chutes are provided with a tool apron on which a step cutting blade is arranged. The invention has the advantage of high processing efficiency and long service life.

The invention discloses an ultrasonic vibration machining device and method for an aluminum-based silicon carbide composite material. The ultrasonic vibration machining device comprises a computer, alaser auxiliary heating part, an ultrasonic vibration machining part, a machine tool workbench, a machine tool spindle and a micro-edge milling cutter, wherein the ultrasonic vibration machining partcomprises an ultrasonic generator, a transducer and an amplitude-change pole; the lower end of the machine tool spindle is connected with the transducer, the lower end of the transducer is connected with the amplitude-change pole, the upper end of the micro-edge milling cutter is clamped at the lower end of the amplitude-change pole, and the ultrasonic generator is connected with the transducer through a wire; a clamp holder is arranged on the machine tool workbench, a workpiece made of the aluminum-based silicon carbide composite material is clamped on the clamp holder, and the clamp holder is connected with a three-way dynamometer; and the laser auxiliary heating part is used for heating a to-be-machined part of the workpiece. In the milling operation process, chip removal can be accelerated, flutter of a cutter is eliminated, abrasive abrasion and adhesive abrasion are reduced, milling force and cutting heat are reduced, the machining size precision is guaranteed, the workpiece surface quality and the machining efficiency are improved, and the machining cost is saved.

The invention discloses an automatic diamond grinding wheel trimming device which is mainly composed of a working table, a chuck and a cylinder body. The chuck is fixed below an upper top plate of the working table and comprises a small bevel gear (11) and a big bevel gear (12) which are meshed with each other. The big bevel gear is connected with a sliding block (15). An energy converter (9), an amplitude-change pole (13) and a diamond stylus (14) are arranged on the sliding block. The energy converter is connected with an ultrasonic generator. A ball screw penetrates through a fixed supporting plate to be connected with a servo motor. A guide shaft penetrates through a movable supporting plate to be connected with an upper cylinder body and the fixed supporting plate. A three-phase asynchronous motor is connected with a grinding wheel (23) through a main shaft. One end of a circuit board is connected with a proximity switch, and the other end of the circuit board is respectively connected with the servo motor and the three-phase asynchronous motor. By means of the automatic diamond grinding wheel trimming device, ultrasonic elliptic vibration of the diamond stylus can be achieved, machining efficiency and machining accuracy of the grinding wheel are improved, rigidity and stability of a cutting system are enhanced, the service life of the diamond stylus can be prolonged, and the automatic diamond grinding wheel trimming device is relatively suitable for trimming grinding wheels made of hard materials.

The invention provides a method for cutting black metal by a diamond tool. A barometric pressure cold plasma jet regulated and controlled cutting interface is combined with ultrasonic vibration auxiliary cutting. Under a barometric pressure condition, a cold plasma jet generated by discharging a graphite needle naked electrode is led out by an insulating guide pipe and then is conveyed to a cutting region so as to effectively regulate and control a contact interface of the diamond tool and black metal. Active carbon particles in the jet are gathered on the contact interface of the diamond tool and the black metal; active particles adsorbed on the surface of the black metal can be used for preventing the diamond tool from being directly contacted with the black metal so as to inhibit chemical abrasion of the diamond tool. The cavitation effect of ultrasonic vibration forms a high pressure and a complicated thermodynamic effect in the cutting process is used for promoting the active particles in the cold plasma jet to be reacted with the surface of the newly-generated black metal to generate a substance, and the chemical affinity between the substance and a diamond is lower than that between the substance and the black metal; the effect of inhibiting the abrasion of the diamond tool is enhanced.

The invention provides a knife handle suitable for low-temperature minimal quantity lubrication, and belongs to the technical field of cooling and lubrication of numerical control machine tools. The knife handle comprises a knife handle body, a peripheral static structure, a multi-layer sealing structure, a heat insulation structure and a bearing supporting structure. The problems that in the minimal quantity lubrication technology, the cooling performance is insufficient, and lubrication is insufficient in the low-temperature cooling machining technology are solved, the oxygen isolation protection effect of an ultralow-temperature medium, the cooling effect of the ultralow-temperature medium and the anti-attrition lubrication effect of minimal quantity lubrication are integrated, and therefore a good machining effect is achieved on the aspect of materials difficult to machine. The knife handle can be used for machining the materials difficult to machine through a traditional numericalcontrol machine tool, the application range of an outer rotating inner knife handle is widened, the cutting heat of the materials difficult to machine in the cutting machining process is effectivelyreduced, the service life of a knife is prolonged, traditional cutting fluid is replaced, and green manufacturing is achieved.

The invention discloses a workpiece residual stress detection method based on ultrasonic driven boring. The method comprises the following steps: 01) polishing workpiece test point surface; 02) pasting a strain rosette to the polished position; 03) connecting the strain rosette and a wiring terminal, and connecting the strain rosette to a corresponding channel of a strain gauge; 04) moving a plane drilling platform onto the surface of a sample, installing a high-precision microscope on the plane drilling platform and carrying out position calibration through the high-precision microscope; 05) dismounting the high-precision microscope and mounting an ultrasonic motorized spindle; 06) after the residual stress value displayed on a computer display screen is stable, adjusting the residual stress value to zero; 07) after turning on a power supply of an ultrasonic motorized spindle driving module, turning on the power supply of a positioning drive module, and controlling drilling feed rate and rotation speed according to a program; and 08) recording and keeping the data after the data is stable. The method can reduce cutting force and can reduce additional stress and additional heat caused by boring itself.

The invention relates to a self-lubricating twist drill and a machining method of the self-lubricating twist drill. The invention provides the twist drill with a lubricating groove, which has the advantages of high strength, large scrap containing space, primary machining formation of the groove and a back, and capability of being designed according to different machining materials. Particularly, in a deep hole machining process, self-lubricating cutting is carried out without the cooling and lubricating effect of cutting liquid, so that the cutting friction is reduced and the effective scrap removing and scrap cutting are carried out. The technical scheme is as follows: an axial section of the self-lubricating twist drill is formed by a cutting circular arc, a scrap coiling circular arc and a tooth back circular arc; the structural size comprises an outer diameter D, a drilling core diameter D1, a blade belt f, a cutting circular arc r1, the scrap coiling circular arc r2, the tooth back circular arc r3, and the lubricating groove U on the cutting circular arc r1; the cutting circular arc r1 is smoothly tangent with the scrap coiling circular arc r2; the scrap coiling circular arc r2 is smoothly tangent with the tooth back circular arc r3; the scrap coiling circular arc r2 and the tooth back circular arc r3 are tangent with the drilling core diameter D1; and the cutting circular arc is provided with no less than one lubricating groove.

The invention discloses a manufacturing method for a heavy-load grinding wheel. The method includes the following steps that 1) raw materials are taken and mixed to obtain molding materials; 2) the molding materials are put in an inner cavity of a die and uniformly spread, and prepressing pre-profiling is carried out; 3) pre-profiling blanks are put in a drying tunnel to be preheated for 1-2 hours to reach the temperature of 115-120 DEG C; 4) preheated pre-profiling blanks are placed in the die to continue to be heated to the temperature of 195 DEG C-200 DEG C, and the grinding wheel is formed through hot pressing; 5) the hot press molding grinding wheel is placed in a drying oven heated to the temperature of 200 DEG C to be solidified for 12 hours and then naturally cooled to the room temperature to be taken out, and a finished product is manufactured. According to the method, toughness of the heavy-load grinding wheel can be improved, cutting heat is reduced, and the cutting ratio is increased.

The invention discloses chamfering machining equipment and a chamfering machining method for curved surfaces of orifices of oil holes of connecting rods, and relates to the field of machining technologies for connecting rods of engines. The chamfering machining equipment comprises a horizontal three-coordinate driving mechanism, a servo spindle driving mechanism and an indexing worktable. The servo spindle driving mechanism is arranged on the horizontal three-coordinate driving mechanism and can be driven by the horizontal three-coordinate driving mechanism to move, a milling cutter shank is arranged at an end of the servo spindle driving mechanism, and a milling cutter is fixed onto the milling cutter shank. The chamfering machining equipment and the chamfering machining method for the curved surfaces of the orifices of the oil holes of the connecting rods have the advantages that the chamfering efficiency and the precision of the profile tolerance of the machined curved surfaces can be improved, and the chamfering consistency and the surface roughness can be enhanced.

The invention discloses a processing method of an aramid fiber reinforced polytetrafluoroethylene holder. The aramid fiber reinforced polytetrafluoroethylene holder (1) comprises two lateral end faces (1.1), a pocket (1.2), an outer-diameter end face (1.3) and an inner-diameter end face (1.4); stable treatment I, semi-finish turning on the outer-diameter end face, semi-finish turning on the inner-diameter end face and stable treatment II are added on the basis of the conventional processing; a bakelite expander (2) is used in the semi-finish turning on the outer-diameter end face and semi-finish turning on the inner-diameter end face; the bakelite expander comprises a lathe clamping section (2.2) and a holder fixing section (2.3); and the whole processes of rough turning on the inner-diameter end face, rough turning on the outer-diameter end face, stable treatment I, turning on the two lateral end faces, semi-finish turning on the outer-diameter end face, semi-finish turning on the inner-diameter end face, distributing and drilling pocket, stable treatment II, finish turning on the inner-diameter end face, finish turning on the outer-diameter end face, and final detection are finally formed. The demands on the processing environment temperature are provided, so that the manufacturing percent of pass of the aramid fiber reinforced polytetrafluoroethylene holder is improved to 80% from below 20% in the prior art.

The invention discloses a microstructure superhard cutter and a manufacturing method thereof. The microstructure superhard cutter comprises a cutter body and a cutter head connected with the cutter body, wherein the cutter head comprises a rake face, a flank face and a tip; a microstructure depressed downwards is arranged on the rake face; and a chip breaking structure for cutting off accumulatedchips is arranged on one side, away from the tip, of the microstructure. The manufacturing method of the microstructure superhard cutter comprises the following steps: S1, adjusting the relative position of a laser and the to-be-machined cutter; S2, turning on the laser to irradiate the rake face of the to-be-machined cutter; S3, controlling the laser to move along a predetermined path. The microstructure with high precision can be machined on the cutter with high hardness, the cutter is suitable for suitable for batch production; and the cutter with the micro structure ahs the advantages thatthe heat dissipation area in the cutting process can be increased, cutting heat is reduced, and the service life of the cutter is prolonged.