110results about How to "Increased depth of cut" patented technology

An indexable insert (16) having a triangular shape with a top surface and a bottom surface (26), as well as a circumferential surface which connects said surfaces, has cutting edges around the corners (28-32). At least in the region of its edges on the top and bottom surface (26), the indexable insert (16) is identical such that all six cutting edges can be used for the same rotational cutting direction. The secondary cutting edges (46, 48, 50) adjoin two main cutting edges (34, 36, 38) and extend at different angles with respect to the same. Over and above this, a surface corner milling cutter with a corresponding indexable insert (16) is described.

A method for designing a fixed cutter drill bit includes simulating the fixed cutter drill bit drilling in an earth formation, determining a dynamic centerline trajectory of the drill bit, and adjusting at least one design parameter based upon the graphical display of at least the dynamic centerline trajectory. To improve performance, the method can include graphically displaying the dynamic centerline trajectory and/or repeating the simulating, determining, displaying and adjusting to change a simulated performance of the fixed cutter drill bit. A drill bit design may be selected and a drill bit may be made according to the design resulting from the method of designing.

The invention provides a milling process parameter optimization method and belongs to the field of cutting machining processes. The coupling effect of a machining device dynamic behavior and the high-speed milling process is considered in the method, the maximum milling extreme cutting depth changing with the rotating speed of a machine tool spindle and shortest machining time of single part are regarded as optimization targets, a milling process parameter optimization model based on cutting stability and productivity is established, and optimal milling process parameters of a milling process parameter combining scheme under the condition that a cutting state is stable when the productivity is maximum are calculated. The milling process parameter optimization method can improve the cutting depth to the most extent during milling, decrease feed times, obtains maximum productivity, meanwhile ensures the cutting stability and avoids flutter. In addition, the milling process parameter optimization method can be applied to the high-speed milling process, the defect that the interactive effect of the machining device dynamic behavior and the milling process parameters is not considered in the high-speed milling process at present is overcome, and optimal high-speed milling process parameters can be obtained.

The invention discloses a carbon fiber composite rotary ultrasonic milling and grinding device and a carbon fiber composite rotary ultrasonic milling and grinding method. The carbon fiber composite rotary ultrasonic milling and grinding device comprises an ultrasonic generator, an ultrasonic transducer, an amplitude transformation pole, a tool, a tool handle and a machine tool body. The carbon fiber composite rotary ultrasonic milling and grinding method is achieved by using ultrasound to assist in milling and grinding so as to process non-ablating carbon/ carbon composite materials. According to the carbon fiber composite rotary ultrasonic milling and grinding device and the carbon fiber composite rotary ultrasonic milling and grinding method, frequency of an ultrasonic power source used in the carbon fiber composite rotary ultrasonic milling and grinding method is consistent with inherent frequency of the amplitude transformation pole, and therefore the effect that vibration applied onto the amplitude transformation pole can cause resonance of the amplitude transformation pole is guaranteed; ultrasonic milling and grinding is adopted, and therefore surface quality of a carbon fiber composite work piece is obviously improved, and roughness of the carbon fiber composite work piece is reduced by about 16%-36%; ultrasonic machining is adopted, and therefore stress in the feed direction of a grinding head is reduced by about 44%, and stress in the downward pressing direction of the grinding head is reduced by about 46%; ultrasonic processing temperature rise is reduced by 29% from comparison between ultrasonic milling and grinding temperature and traditional milling and grinding cutting temperature of a carbon fiber composite.

The invention discloses a glomerocryst cubic boron nitride composite sheet and a preparation method for the same. The glomerocryst cubic boron nitride composite sheet comprises a hard alloy matrix and a glomerocryst cubic boron nitride layer, wherein the glomerocryst cubic boron nitride layer is prepared from the raw materials in the following parts by weight: 70-85 parts of cubic boron nitride micro-powder, 10-15 parts of metallic bond, and 5-10 parts of ceramic additive. The method is performed according to the following steps of: A, uniformly mixing; and B, filling the mixture and the hard alloy matrix in a molybdenum cup provided with a salt tube shielding layer for isolating, heating, and synthesising. Compared with the prior art, the glomerocryst cubic boron nitride composite sheet and the preparation method for the same disclosed by the invention have the beneficial effects that the service life of the composite sheet is prolonged, unsoldering phenomenon is avoided, and cutting efficiency is good.

The invention provides a rotary drag-type drill bit in which the relationship of torque to rotary bit speed is such that torque generally increases with bit speed. Such a bit has a reduced tendency to exhibit the phenomenon known as "stick-slip" while drilling, when compared with bits having a different torque /speed characteristic, as a result of the positive damping effect of the torque/speed relationship. One method of designing such a drill bit comprises ascertaining the torque/rotary bit speed relationship, or other correlated relationships, for a number of different drill bit designs and then selecting from those designs a design having the desired type of relationship. Examples of drill bit structures specifically designed to achieve the desired torque/speed relationship are also disclosed.

A process of grinding a surface of a workpiece, by a grinding tool rotated about its axis. The process includes a grinding step of grinding the workpiece surface, by pressing at least one of the grinding tool and the workpiece against the other of the grinding tool and the workpiece, such that a constant force is exerted on the other of the grinding tool and the workpiece by the at least one of the grinding tool and the workpiece. Also disclosed is a grinding apparatus including: a moving device operable to move at least one of the grinding tool and the workpiece relative to the other of the grinding tool and the workpiece, at least in an infeed direction that increases a depth of cut of the grinding tool into the workpiece; and a controller which controls the moving device, such that the at least one of the grinding tool and the workpiece is pressed against the other of the grinding tool and the workpiece, with a constant force.

A ball endmill includes a cylindrical tool body that is to be rotated about its axis, ball-nosed end cutting edges located in an axially distal end portion of the tool body and describing a semi-spherical-shaped locus during rotation of the tool body, and spiral gashes located in the axially distal end portion of the tool body and defining rake faces of the respective ball-nosed end cutting edges. The tool body is made, at least at its part providing each ball-nosed end cutting edge, of a hard sintered body. Each ball-nosed end cutting edge is inclined with respect to the axis by a helix angle in a range from about 10° to about 30°. The tool body has, in its distal end, a non-gashed central area in which the spiral gashes do not exist. A ratio of a size of the non-gashed central area to a ball nose radius is in a range from about 0.03 to about 0.1.

The invention relates to a construction method for protectively cutting a tunneltron piece, which belongs to the field of building engineering. The technical problem to be solved by the construction method is to overcome the defect that adjacent tunneltron pieces are damaged when a general construction method is used for cutting the tunneltron piece. The construction method adopts the technical proposal that: firstly, a filling hole is drilled on the upper part of a tunnel of a region to be frozen, and the frozen region tunnel is filled; secondly, a certain number of drill holes are drilled in the frozen region, and freezing pipes are arranged inside the holes; thirdly, low-temperature brine is conveyed through the freezing pipes for heat exchange, and a frozen cylinder is formed after the temperature is reduced; fourthly, the frozen cylinder is continuously widened to form a frozen wall along with continuation of the freezing effect; and fifthly, a hot brine circulating hole is constructed on the side of the frozen wall, the freezing range is controlled to be expanded to a cutting area, and special equipment is adopted for cutting the tunneltron piece in the cutting area. The construction method has low influence on the adjacent tunneltron pieces when cutting the tunneltron piece, and can be widely used for engineering construction such as cleaning of deep underground barriers, modification and construction of the prior tunnel under special operating conditions, and so on.

The invention discloses a tool chip breaker, solving the problems of difficult chip breaking caused by great material plasticity and elasticity in the process of automatic processing and thin-cutting. The key of the invention is that a section of major first face and a first front angle are added in the cutting edge of a linear arc-shaped chip breaker, and the back of the major first face is a major second face; according to the parameters of cutting thickness, the major first face and the major second face, the corresponding curvature radius of an arc chip reeling slot is calculated. The tool chip breaker has the advantages that: as a section of the linear major first face is added in the cutting edge, the curvature radius of the arc chip reeling slot is reasonable, the chip deformation is increased, the effect of chip reeling and breaking is improved; the angle of the cutting edge is increased, the strength of the cutting edge is strengthened and the cutting depth is deepened; the new structure ensures that the chip goes into the chip reeling slot more smoothly.

The invention relates to an electrolytic milling-grinding machining tool cathode with efficiency and precision and an electrolytic milling-grinding method, and belongs to the field of electrolytic milling-grinding composite machining. According to the electrolytic milling-grinding machining tool cathode and the electrolytic milling-grinding method, a plurality of arc-shaped grooves at equal intervals are formed in the lower end of the side wall of the tool cathode, the side walls of the grooves are insulated, and diamond abrasive particles are inlaid in the wall surfaces of the portions, except for the grooves, of the side wall of a cathode base body through a resin binder, so that electrochemical anodic dissolution only exists in the surfaces of the portions, opposite to the grooves, of aworkpiece, at the moment, the depths of the grooves become a part of a machining gap, accordingly the contact depth between the diamond abrasive particles in the portions, except for the grooves, ofthe side wall of the cathode base body and the machining surface of the workpiece is increased, then the grinding effect of the diamond abrasive particles on the workpiece in the electrolytic milling-grinding process is enhanced, and the precision and the surface quality of the electrolytic milling-grinding machining can be improved; and moreover, compared with the electrolytic milling-grinding finish machining under the low current density in the past, the tool cathode can adopt higher current density, and the machining efficiency can be improved.

A pipe cutter according to the invention has an inner head part which, in the working position, rotates about a pipe which is clamped in the inner head part and is to be processed. Integrated in the inner head part are a spring-mounted cutting wheel head (8) having a cutting wheel (7) for cutting the pipe and a plurality of support rollers (9) in spring-mounted receptacles (10). The arrangement and formation of cutting wheel (7) and support rollers (9) is such that the clamped pipe is at right angles to the cutting wheel (7), and a right-angled cut is thus achieved. Moreover, a defined feed cutting force can be set by the spring mounting of cutting wheel head (8) and support roller receptacles. During cutting, the pressure on the pipe decreases with increasing cutting depth, and the pipe can thus be cut cleanly and without burrs.

The invention provides a cable processing apparatus for removing a shield film (20) from a shielded four-core round cable (10). The cable processing apparatus has four cutting tools capable of moving radially toward a round cable (2, 3, 4, 5) for cutting a mask film (20). Here, the cutter (2, 3, 4, 5) is distributed to the core (11) of the circular cable (10). The cutting edges (23, 24, 25, 26) of the cutters (2, 3, 4, 5) are respectively recessed. The cutter (2, 3, 4, 5) is provided with guiding elements (6, 7, 8, 9); the guiding element has guide segments (27, 28); the core (11) wrapped by the shielding film is accommodated in the boot segment. The knives (2, 3, 4, 5) protrude with respect to the guide elements (6, 7, 8, 9) in the area of the guide segments (27, 28) with the amount of interference (t). The guide segments (27, 28) have a cylindrical recessed shape and form a recessed abutment against the core (11).

The combined cutting tool with several cutting edges includes one cutter bar, and several cutting blade mounting mechanisms with separately mounted blades in the same or different entering angles. On the one hand, the combined cutting tool with several cutting edges can cut with its multiple cutting edges in doubled cutting depth, increased feed and doubled cutting efficiency. On the other hand, the present invention has flexible machining form, convenient operation, changeable number of cutting edges and adjustable entering angles. In addition, the cutting blades may be made of different materials, cubic boron nitride, diamond, hard alloy, etc. selected based on the machining requirement, machining cost and other factors.

The invention discloses an automatic crimping machine for ground wires, which includes a crimping platform, a crimping device located on the crimping platform, and a wire stripping device arranged on the left frame of the crimping device. The wire stripping device includes a power mechanism, The wire stripping mechanism and the first ground wire clamping mechanism, the power mechanism is connected to the wire stripping mechanism through the transmission mechanism, the wire stripping mechanism includes a cutter assembly for stripping wires and a support assembly for supporting the cutter assembly, the cutter The assembly includes a wire stripping blade that moves circularly around the ground wire and can move radially, and the first ground wire clamping mechanism is used for clamping the ground wire. The invention integrates the wire cutting device, the wire stripping device and the crimping device on one crimping platform, which facilitates the crimping of the ground wire, has high safety, is easy to operate, and improves work efficiency: the wire cutting device is used to cut the wire, and the wire stripping device is used to The device is used for stripping wires, with high processing accuracy and low labor intensity.

The invention discloses a device for longitudinally cutting cigarettes, which consists of a machine body, a cigarette-sampling device, a longitudinally cutting device, a longitudinally-cutting depth adjusting device, a tobacco shred collecting box and the like. The device has the advantages of realizing fast separation of cigarette tobacco shred from cigarette paper and filter tip, ensuring the quality of the cigarette tobacco shred, avoiding a large amount of manual labor and reducing the influence of personal factor on the quality rank of the tobacco shred, along with reasonable structural design and convenient use. The machine can be operated continuously so as to enhance the separation efficiency of the cigarette tobacco shred, save time for the tobacco shred detection in a laboratoryand obtain consistent high praise from users.

The invention discloses a cutting machine and a cutting method thereof. The cutting machine comprises a cutting mechanism, a clamping mechanism used for clamping an article to be cut and a feeding mechanism used for conveying the article to be cut to the appropriate position. The cutting mechanism comprises not less than a set of blade holders arranged on the two sides of the article to be cut. Each blade holder is provided with a sliding base which can slide front and back under the limitation of the corresponding blade holder. Each sliding base is provided with a cutting blade, and a certain included angle is formed between the sliding track of each sliding base and the article to be cut. According to the cutting machine, in the cutting process, the cutting blades evenly increase the cutting depth while cutting the article, the defect of incomplete cutting caused by metal deformation or abrasion of the cutting blades in the cutting technology cannot happen, and the cutting machine can cut various materials and is wide in adaptability range.

A ball endmill having (a) a cylindrical tool body and (b) ball-nosed end cutting edges each of which includes (b-1) a first portion provided by a radially inner portion of each ball-nosed end cutting edge, and (b-2) a second portion provided by a radially outer portion of each ball-nosed end cutting edge. The first portion is defined by a circular arc which is convex in a direction of rotation of the tool body and which has a first radius of curvature as measured in a distal end view perpendicular to the axis. A ratio of the first radius of curvature to an outside diameter of the cylindrical body is not smaller than 0.025 and not larger than 0.10. The second portion is defined by a circular arc which is convex in the direction of the rotation of the tool body and which has a second radius of curvature as measured in the distal end view. The second radius of curvature is larger than the first radius of curvature.

A gear pump (1) that discharges a fluid by rotating while a pair of gears (11, 12) are intermeshed includes a body (2) into which the respective gears (11, 12) are incorporated, a housing (3, 4) that contacts the body (2), a number of particles (30) that are interposed between an end surface (25, 26) of the body (2) and an end surface (28, 29) of the housing (3, 4), which contact each other, to prevent positional deviation between the body (2) and the housing (3, 4), and a fastening member (17 to 20) that fastens the housing (3, 4) to the body (2).

An alga removing device comprises an unmanned aerial vehicle, a bearing, a first motor, a first support, a fourth air cylinder, a dust collector, floating balls, a rope, a floating plate, a second motor, a floating table, a waste storage tank, a chain, a roll shaft, a coiling block, bottom discs, lifting landing legs, a second support, a controller, second gears, a supporting frame, a first air cylinder, rotating rods, a second linear motor, second movable blocks, blades, first gears, rotating shafts, a third motor, a first movable block, a first linear motor, a first cutter, heating pieces, a second air cylinder, a third movable block, a second sliding block, a frame, a third linear motor, a fourth motor, a second sliding rail, electric push rods, a groove, a first sliding rail, first sliding blocks, a fifth sliding rail, a fifth sliding block, a fifth motor, a second cutter, a third air cylinder, a third sliding block, a third sliding rail and a supporting plate. The lifting landing legs are arranged on the left side and the right side of the unmanned aerial vehicle. The bottom discs are arranged below the lifting landing legs. The alga removing device has the beneficial effect of being capable of automatically removing algae.

The invention discloses a method for improving the working stability of an end mill and a high-stability end mill; the number of the teeth of the end mill is manufactured into an even number, so that the end edges of the teeth are unequally distributed on the same circumstance even if the angles of the end edge of each tooth and the end edges of the teeth on both adjacent sides are different, and meanwhile, the spiral angles of a spiral groove of the circumferential edge of each tooth and the spiral grooves of teeth on both adjacent sides are unequal; and consequently, the working stability of the end mill can be improved. The invention not only has the advantages of good working stability, high working efficiency and good processing quality, but also has the advantages of simple structure, easiness in production and long service life.