242results about How to "Smooth chip removal" patented technology

An integral structure of a turn-milling complex machining center is disclosed, characterized by a single post and feeding boxes hung at two sides. The left-suspending feeding box is provided with a B-axis cutter holder device with cutters at three locations. The B-axis cutter holder device is used for the working procedures for crank machining like turning, milling, boring, deep-hole drilling, threading and the like. The right-suspending feeding box can be provided with a large-scale milling cutter disc for external milling machining of the crank shaft. Two spindle boxes have two Cf-axis structures, the two spindle boxes are movable along a Z-axis on the machine body, and the tip of the right spindle box is stretchable. The machine is fitted with a plurality of hydraulic self-centering center rests that have high precision retentivity. A guide rail on the machine body forms an angle of inclination of 30 degrees with a horizontal plane, and the plane of the machine body is completely ground to ensure the absence of scraps and dead corners. The entire machine is fully protected. An inner cavity of the guide rail for the operation of the single post of the machine body is supported by double ribs, and two sets of corners remain stressed all the time in the process of the operation of the post. A front support bearing of the spindle employs an imported large-diameter double-column cylindrical roller bearing. The invention solves three problems and the machining for parts of a main journal and a connecting journal of the crank prior to grinding can be completed by one-time mounting on a machine, thus realizing high-precision and high efficient machining for the crank shaft of a medium speed machine for ships; in addition, the invention bears heavy load and is fully-protected.

The invention discloses a device for drilling and forming a hole in coal rock in a structural belt. The device comprises a power device, a drilling rod mechanism and a water injection mechanism; the drilling rod mechanism comprises an external drilling rod; the external drilling rod comprises an external wall and an internal wall which are concentrically sleeved together; an external drilling rod cavity is formed between the external wall and the inner wall; a hollow internal drilling rod is concentrically sleeved in the inner wall; the external diameter of the inner drilling rod is smaller than the inner diameter of the inner wall so that an annular runner is formed between the internal drilling rod and the inner wall; the front end of the external drilling rod is provided with an annular external drilling head; the front end of the internal drilling rod is provided with a disc-shaped internal drilling head; the water injection mechanism comprises an internal drilling rod water injection device and an external drilling rod water injection device; and the power device is in transmission connection with the external drilling rod and the internal drilling rod by a transmission mechanism. By the device, the problems of easily-collapsed holes in the coal rock and difficulty in hole forming and gas drainage of a structural area can be solved, so that hole forming rate in the structural belt and around structural belt is improved, gas pre-drainage is effectively performed, and the safety of coal exploitation is further enhanced.

The invention discloses a numberical control hobbing machine with zero transmission, which comprises a machine body, a main shaft system, a hobbing cutter feeding and angle adjusting system and a control system; the main shaft system comprises a functional part of a hobbing cutter main shaft and a functional part of work-piece main shaft part; the functional part of the hobbing cutter main shaft is an integration of the rotator of the servo motor I and the hobbing cutter main shaft, and the functional part of the work-piece main shaft is an integration of the rotator of the servo motor II and the work-piece main shaft. The numberical control hobbing machine of the invention can remove the manufacturing errors of transmission component of generating motion and the influence on gear process caused by space and assembly error, is able to greatly improve process accuracy and process speed of machine tool. The numberical control hobbing machine of the invention has simple structure, is able to improve overall rigidity of machine tool, solves the wearing problem caused by mechanical transmission chain, improves the retentivity of precision, causes the hobbing speed to be higher than the numberical control hobbing machine with traditional structure, shortens milling time as well as based on which, the hobbing machine is provided with the machine tool conditions required by dry type hobbing through adopting a series of matching technical measures.

The invention discloses a broaching method and a special tool for high-accuracy small-sized mortises. A special broaching tool is used for machining a to-be-machined workpiece. The structure of the special broaching tool meets the requirement that straight chamfers or/and round chamfers capable of participating in broaching are arranged on tooth crests of the broaching tool. The broaching method for the high-accuracy small-sized mortise meets the requirements that a broaching machining allowance elimination mode comprises the step of machining the workpiece by using main blades on the tooth crests of the broaching tools or/and the chamfer parts of the broaching tools, and the chamfer parts of the broaching tool are the straight chamfers or/and the round chamfers on the two sides of blades on the tooth crests; and totally 11 broaching tools are formed into a complete set, and are sequentially used for machining all the contour shapes of the mortises. The method and the special tool are mainly applied to the broaching machining of mortises of core parts of aero-engines and gas turbines such as turbine disks and air compressor disks, can be popularized and used for like parts, and have broad application prospect in a series of new-generation aero-engines and gas turbines, and a technical bottleneck in the broaching of specially-structured high-accuracy small-sized mortises is solved.

The invention discloses a bulb end milling cutter comprising a bulb part and a cylindrical/conical part. An S-shaped bulb edge (1) of the bulb part and a rear tool face (3) of the bulb edge connect respectively with a spiral circumferential edge (5) of the cylindrical/conical part, a front tool face (6) of the circumferential edge, and the rear tool face of the circumferential. A rather big positive front angle is provided at the front tool face (2) of the bulb edge, and a narrow edge flank (9) is provided near the cutting edge of the bulb edge front tool face; the groove bottom curve of the bulb part spiral groove (4) is a lead-variable scroll, the groove bottom curve of the spiral groove (8) of the cylindrical bulb end milling cutter the cylindrical part is a axis protecting scroll, and the groove bottom curve of the spiral groove (8) of the conical bulb end milling cutter the conical part is a conical scroll. The invented milling cutter is provided with characteristic of stable milling process and smooth chip removal, the processed products thereof have high precision and good quality, and the milling tool can be used broadly.

The invention provides a novel self-chip-removal machine tool. The cutting efficiency is effectively improved through vibrating drilling, and the novel self-chip-removal machine tool is smooth in chip removal and high in chip removal speed. A guide rod is arranged on the machine frame. An upper supporting plate is connected to the periphery of the guide rod in a vertical sliding and sleeving mode. The two ends of each spring are fixedly connected to the upper supporting plate and a machine frame respectively. A first drive device is arranged on the machine frame. A cam mechanism comprises a cam and a driven rod. The cam is connected to the periphery of an output shaft of the first drive device in a sleeving mode and is driven by the first drive device to rotate. One end of the driven rod is arranged on the upper supporting plate, and the other end of the driven rod abuts against the cam. A second drive device is arranged on the upper supporting plate and can drive a lower supporting plate to move in the axial direction of the guide rod. A third drive device is arranged on the lower supporting plate and can drive a drilling assembly to rotate. A drill stem is connected with an output shaft of the third drive device. A drill bit is arranged on the side, away from the third drive device, of the drill stem. The novel self-chip-removal machine tool is used for arranging a clamping piece on the machine frame, wherein the clamping piece is used for clamping workpieces.

The invention discloses a method for processing layered vibrating composite abradant, which comprises: axially processing low-frequency and ultrasonic vibrations on the plated diamond at the same time when processing rigid material, to layer said two vibration, and processing a axial pressure p on the device; using water as medium to guide the plated diamond and dissociate abradant into treating section at the same time. Said treating device comprises a piezoelectricity heat exchanger, the first bolt, an amplitude rod, the third bolt, and a device for plating diamond, wherein, the amplitude rod via the flange disc and the second bolt at itself note to connect the cover of piezoelectricity heat exchanger; a workbench and a low-frequency vibrator are arranged under the diamond plating device, while the workbench has a clamp. The invention can reduce the processing force (only 1/6-1/8 of traditional ultrasonic processing force) and the inner stress of work-piece; improve the processing accuracy to 0.001-0.003mm, with better integration and lower cost.

The invention discloses an indexable cutting insert for rough machining. An insert body is a polygonal body, the geometrical center is provided with a mounting through hole, a chip breaker body is arranged around the mounting through hole, and cutting units are respectively distributed at the included angle between each two neighboring sides. The indexable cutting insert is characterized in that each cutting unit consists of a main cutting edge and an auxiliary cutting edge; each of the main cutting edge and the auxiliary cutting edge is provided with a chamfer plane and an arris plane, and a first front insert face and a second front insert face are connected with the chip breaker body through concave bottoms; at each cutting unit, the chip breaker body is provided with a boss, the surface of the boss gradually rises to form a first chip breaker and a second chip breaker, a first concave is formed between the ridge of the first chip breaker and the ridge of the second chip breaker, a second concave is formed between the second chip breaker and the chip breaker body, and both the first concaves and the second concaves are smoothly connected with the concave bottoms. Under the premise of guaranteeing the edge strength of the insert, the cutting resistance is decreased, the indexable cutting insert has high chip-breaking ability, and the overall cutting performance is good.

The invention discloses a coating end milling cutter for graphite die machining and a preparation method of the coating end milling cutter. The coating end milling cutter is characterized in that the unique end cutting edge length distribution is achieved, one long end cutting edge passes through the circle center of the bottom face of the end milling cutter, three short end cutting edges do not pass through the circle center of the bottom face of the end milling cutter, enough chip removal space is reserved among the end cutting edges, and the front angles and the rear angles of the end cutting edges and the helical angle of a cutting edge are reasonable. The optimal cutting edge arc radius for ensuring the coating bonding strength and the cutting edge strength at the same time is achieved. After the surface layer of the end milling cutter is subjected to acid-base two-step chemical pretreatment by a Murakami solution and a Caro mixed acid solution, and a micro-nano compound alloy diamond film with the tough bottom layer, smooth surface layer and even and reasonable film thickness is coated by a chemical vapor deposition method. Compared with a traditional hard alloy end milling cutter, the coating end milling cutter can meet the use requirement of mobile phone glass for the surface finish degree of a hot bending graphite die, remarkably prolongs the service life of the cutter and remarkably improves the machining surface finish degree of the graphite die.

The invention relates to a machining method used for a thin-wall cavity type magnesium-lithium alloy part. The machining method comprises at least the following steps that (1) bar blanking is conducted; (2) outer circle turning is conducted, and a deep hole is drilled and turned; (3) rough milling is conducted on the part shape, and a 2 mm unilateral allowance is reserved; (4) according to part requirements, the deep hole in the step (2) is numerically milled to form a mold cavity; (5) the part is subjected to heat treatment, firstly, the part is washed to be clean through gasoline and placed in air to be aired thoroughly, the effect that no cuttings are on the surface of the part is ensured, and after the part is heated to 90 DEG C and heat preservation is conducted for 3 h in a thermotank, air cooling is conducted to the room temperature; (6) half-finish-milling is conducted on the part surface; (7) subzero treatment is conducted on the part, small fragmental or pulverized cuttings on the part are cleared away before furnace charging, then the part is put into a refrigeration box to be subjected to heat preservation for 5-6 h in -195 DEG C liquid nitrogen, and air cooling is conducted to the room temperature; (8) finish-milling is conducted on the part surface according to the edge distance size requirement of the part surface; and (9) finishing is conducted. Through the machining method, safety and high-quality during machining of the thin-wall cavity type magnesium-lithium alloy part are achieved, and the anti-corrosion capacity is improved.

The invention relates to a tungsten steel flat drill, which comprises a tool blade and a tool handle that are formed integrally. The tungsten steel flat drill is characterized in that the tungsten steel flat drill is made of a tungsten steel material, the tool handle is a cylindrical straight handle; the tool blade is in a step shape; a transition part is arranged between the tool blade and the tool handle; a round table is arranged at the bottom end of the transition part; a cambered chip discharge groove is formed from the round table to a rake face of the tool blade; the tool blade is in a two-stage type; the first-stage tool blade is positioned at the front end of the tool blade; the width of the first-stage tool blade increases stage by stage; cutting edges of the first-stage tool blade and the second-stage tool blade are arranged at the edge of the tool blade; an edge point is arranged at the top end of the first-stage tool blade; and a 45 DEG cutting edge is arranged at a connection part between the second-stage tool blade and the transition part. The tungsten steel flat drill has a large chip discharge area and is long in service life; chips are discharged smoothly; as the tool blade of the tungsten steel flat drill is in a step shape, two step holes in different diameters and outer hole chamfers can be processed once without aligning a tool; and the processing precision and the working efficiency are improved greatly.

The invention discloses a milling cutter used for processing non-metal materials at high speed. Transitional groove edges (5) are arranged between adjacent main cutting edges (3); the helical angle omega of an minor cutting edge (4) is 50 to 60 degrees; the front angle alpha1 and the rear angle of beta1 of the main cutting edges (3) are 15 degrees; the front angle alpha2 of the minor cutting edge (4) is 12 degrees and the rear angle is 15 degrees; circular arc groove radii D4 of the main cutting blades (3) are 1.5mm to 3.5mm; the radial section of a helical groove of a rake face (6) is a circular arc with radius D2 of 3.5mm to 6mm; a flank (7) consists of a main flank (8) with width D1 of 1.5mm and a minor flank (9) with radial section being an circular arc with 7.5mm to 15mm of radius D3; the diameter D of the cutter is 20 to 50mm. The invention with the advantages of high cutting efficiency, small cutting resistance, smooth chip removal, light body and good intensity is applicable to the high-speed coarse and fine milling of foam, resin, plastic, organic glass and other non-metal chemical materials.

The invention discloses a precise composite reamer. The precise composite reamer comprises a reamer handle, a reamer head and two blades, wherein the reamer handle is welded with the tail part of the reamer head; the reamer head comprises a cylindrical section and a working section; the working section of the reamer head is provided with two diagonal V-shaped chip discharging grooves; the two blades are respectively arranged at the front ends of the two V-shaped chip discharging grooves and are composite blades made of polycrystalline diamond (PCD); the reamer head is made of YG8; the reamer handle is made of GCr15; the reamer handle and the tail part of the reamer head are in V-shaped welding, and the direction of V-shaped welding and the diagonal direction of the two V-shaped chip discharging grooves are vertical. The part of the reamer head participating in cutting is made of YG8, so that (1) the rigidity of the reamer is increased; and (2) the part of the reamer participates in machining of chamfering and arc transition and also participates in cutting similarly to the PCD blades, so that the process requirements are met, and the cost is saved. The handle part is made of GCr15, so that the production cost of the reamer is reduced, simultaneously the machining difficulty of a thread hole in the tail part of the reamer handle is reduced, the production efficiency is increased and the production cost of the reamer is reduced.

The invention discloses a special cutting-width-variable three-edge milling cutter for grooving an overall blade disk, belongs to the technical field of machining tools, and aims to solve the problems of tool abrasion, poor chip removal effect, poor machining quality, non-adjustable blade position, low machining efficiency, high production cost, large tool manufacturing difficulty and inconvenience in tool installation when the overall blade disk is grooved and machined by an existing three-edge milling cutter. A central bushing is fixedly arranged in a cutter body; N chip removal grooves are uniformly formed in the outer circumferential surface of the cutter body; two groove inner side surfaces of each chip removal groove are a large inclined surface and a small inclined surface; a cutter groove is formed in the small inclined surface of each chip removal groove; two adjacent cutter grooves are staggered; a threaded block groove is formed in the outer circumferential end surface of the cutter body; an elongated guide groove is formed in the side surface of each cutter groove; a blade is arranged in each cutter groove and is in fastened connection with a threaded hole of a threaded block through a fastening screw which penetrates into a fastening screw hole and each elongated guide groove; when each blade shifts for 0.5mm, 1.0mm or 1.5mm, a cushion block is arranged between each blade and the end surface of the corresponding cutter groove. The special cutting-width-variable three-edge milling cutter is used for grooving the overall blade disk.

The integrated drilling and tapping tap of the present invention includes a shank and a blade, and the key point is that the blade is composed of a drill at its end and a tap near the shank. The front part of the present invention adopts the combination form of a drill bit and a tap. After drilling, the tapping thread can be realized without changing the tool, and the scattered processes are reasonably concentrated, the number of processes is shortened, the process is simplified, and the time for clamping and tool changing is saved. , reducing the number of special machine tools and special fixtures, shortening the production line, simplifying equipment design, and improving production efficiency; and the integrated structure of drilling and tapping also ensures the precision of its processing, thereby ensuring product quality. The drilling-tapping integrated tap of the present invention can effectively improve the working efficiency of processing internal threads by combining the drill bit and the tap, and can also reduce production costs while ensuring product quality.

The invention relates to the field of machining, in particular to a small-diameter double-line inner trapezoidal thread machining method. The small-diameter double-line inner trapezoidal thread machining method comprises the following steps of firstly turning a bottom hole according to the size accuracy requirement, then using a trapezoidal threading tool to complete turning of two spiral grooves, making two straight lines perpendicular to the axis at the bottoms of turned tooth grooves, utilizing left-right tool assisting of a small sliding plate between the wide bottoms of the groove and using a middle sliding plate to control tooth depth to perform turning as long as two tool points of the threading tool uses the bottom widths of the grooves as the standard, and accordingly completing rough turning. Due to the fact that a tool bit is thin and small, it is appropriate that a straight feeding method and a left-right tool assisting method are adopted to perform four-layer turning according to the tooth depth and the bottom widths of the grooves. By means of the small-diameter double-line inner trapezoidal thread machining method, the pressure of a turning tool can be decreased, chip removal can be smooth, an edge breaking phenomenon is also avoided, the rigidity of the turning tool is improved, vibration of the turning tool is prevented, the machining quality of parts can be ensured, and production efficiency can be improved.

The invention provides a processing fixture for a long-hinge part, and the processing fixture comprises a fixture main body, an end part drilling template, a plurality of sliding drilling templates and a clamping piece, wherein the fixture main body is provided with a first locating surface and a second locating surface; the first locating surface is positioned on the end part of one side of the fixture main body; the second locating surface is vertical to the first locating surface and roughly extends in parallel to the horizontal plane; the end part drilling template is positioned on the first locating surface of the fixture main body and is provided with a first guide hole; each sliding drilling template is positioned on the second locating surface of the fixture main body, is provided with a second guide hole corresponding to the first guide hole of the end part drilling template and is also provided with an opening capable of containing the boss of a long hinge; and the second guidance hole is used for processing the boss, which is contained in the opening, of the long hinge. In the processing fixture, a horizontal boring fixture is adopted to make chip removal relatively smooth so as to guarantee that the processed part has better surface roughness.

The invention discloses a solid carbide drill chip breaker groove for a steel part and a design method of the solid carbide drill chip breaker groove for the steel part. The structure of the solid carbide drill chip breaker groove for the steel part is as follows: one end of a chip rolling groove is a negative chamfered edge, the other end thereof is a chip breaker table, and the chip rolling groove is arranged at a joint point of the chip breaker table R. The design method of the solid carbide drill chip breaker groove for the steel part comprises the following steps of: 1, selecting a five-axis grinding centric device; 2, selecting a diamond grinding wheel in a type of 75 degrees as a grinding wheel; and 3, carrying out the specific operation as follows: 1) adopting an imported five-axis-linked grinding center, and setting a cutting blade-blade angle of inclination in a machining center program; 2) setting the thickness of a drill core according to 26% of diameter of the drill of the steel part; and 3) enabling a solid carbide drill of phi(10) to have the following specific parameters of chip rolling and chip breaking requirements: a front angle is 10 degrees, the thickness of the core is 2.5 mm, a tilt angle is 8 degrees and an angle of declination of the grinding wheel is 3 degrees. The solid carbide drill chip breaker groove for the steel part has the following advantages that: the temperature of a cut region is lowered, the durability of a cutting tool is improved, the winding of cut chips on a cutter handle and the cutting tool are effectively avoided, the chip blocking is avoided, the breaking phenomenon of the cutting tool, caused by the chip blocking, is eliminated, the high-speed cutting is completely adapted, and the cutting requirement of high-strength steel is met.

The invention relates to an inner bore grooving cutter which is an integrally formed structure. The inner bore grooving cutter comprises a cylindrical cutter handle, wherein a clamping plane is arranged on the cutter handle; an arc surface is milled on the front end of the cutter handle; the arc surface is crossed with an extending surface of a circular arc outside the cutter handle to form a transitional cutter bar with a similar oval sectional form; a cutting plane parallel to an axis of the cutter bar is milled on the front end of the transitional cutter bar; the cutting plane and an inclined section of the transitional cutter bar are enclosed to form a chip groove of the grooving cutter; a cutting edge is arranged on the top end of the transitional cutter bar; the front surface of the cutting edge is arranged on the cutting plane of the transitional cutter bar. The inner bore grooving cutter occupies little machining space and removes chips smoothly, and can machine inner threads with various thread pitches from 0.2mm to 10 mm or more; a relief angle of the threads is modified according to a spiral lifting angle for machining the threads, so that the cutter is ensured to be cut smoothly.