30results about "Broaching tools" patented technology

The utility model discloses a broach with a special tooth embedded blade, which solves the problems that the service life of the existing broach is short due to the fact that the special tooth is easy to abrade in the broaching process to cause meat falling and strain at an outlet, and the existing broach is lack of special structural design in the radial direction and is not capable of improving the performance of individual teeth. The cutter comprises a cylindrical cutter body, a cutter strip groove is formed in the outer wall of the cutter body in the direction parallel to the central axis, a cutter strip is arranged in the cutter strip groove and connected to the cutter body through a bolt, and a plurality of special key grooves are formed in the cutter strip at equal intervals to form special teeth. The cutter further comprises a plurality of rows of spline cutting teeth, each row of spline cutting teeth is arranged on the outer wall of the cutter body, and the two ends of each row of spline cutting teeth are located on the two sides of the corresponding cutter strip groove respectively. A plurality of splines are arranged on each row of spline cutting teeth at equal intervals to form the spline cutting teeth; the broach is an assembly type broach, the blade can be replaced according to the actual use condition, and the economic cost is reduced.

The utility model relates to the technical field of broaching tools and provides a heavy-load broaching tool assembly which comprises a broaching tool box and a broaching tool arranged on the broaching tool box, an inserting hole is formed in the back face of the broaching tool box, a first hanging column is arranged on the first side face of the broaching tool box, and a second hanging column is arranged on the second side face of the broaching tool box. According to the heavy-load broach assembly, a complex grabbing clamp does not need to be adopted for fixing the broach box to carry out operations such as feeding, feeding and discharging of broaches any more, so that the operations such as loading, taking and placing of the heavy-load broach assembly are very convenient and fast, and the heavy-load broach assembly is convenient to use. The broach box can be conveniently and rapidly fixed in the using process of the heavy-load broach assembly.

The broach mechanism for the long-span main shaft comprises a main shaft body, the surface of a pull rod is movably connected with a pull rod sliding sleeve in a sleeved mode, a sealing ring is installed on the surface of one side of the pull rod sliding sleeve in an embedded mode, the outer side of the pull rod sliding sleeve is connected with a sliding sleeve fixing block, and the sliding sleeve fixing block is fixedly connected with the main shaft body. A hexagonal groove hole is fixedly formed in the surface of one side of the sliding sleeve fixing block, four sets of rear bearings and four sets of front bearings are installed on the inner side of the main shaft body, a front bearing seat is fixedly installed on one side of each front bearing, movement of a pull rod is separated from rotation of a rotor assembly, the complexity of the pull rod is reduced, and the service life of the pull rod is prolonged. And the number of structural parts is reduced. The fixing of the pull rod sliding sleeve can effectively reduce vibration and noise caused by too many degrees of freedom of the pull rod, the front bearing and the rear bearing are used at the front end of the main shaft body, through the paired use of the bearings, the axis positioning of the rotor assembly during high-speed rotation can be kept, and vibration and deviation are reduced.

This invention provides a broaching tool structure with complementary irregular cutting edges, including a tool holder, a precision adjustment component, a tool holder, and broaching inserts. The bottom of a guide rail is fixed to the tool holder, and the top of the guide rail has a groove that slides with a slide block. The tool holder is fixed to the slide block. Below the groove, the guide rail has an adjustment groove. A first wedge and a second wedge are positioned within the adjustment groove, their inclined surfaces engaging. The guide rail has an adjustment hole. A cylindrical boss is located on the outer surface of the first wedge, passing through the adjustment hole. A coarse adjustment sleeve is axially positioned within the adjustment hole and threaded onto the boss. A fine adjustment screw is axially positioned inside the boss and threaded to the outer surface of the first wedge. The second wedge is connected to the bottom of the slide block. An elastic reset element is positioned between the first or second wedge and the adjustment groove. This invention solves the problems of existing broaching tool cutting edge positions being unadjustable or having low adjustment resolution.

The application discloses a super-long internal broach for long-ratio inner hole profile broaching, which comprises a broach bar, a broach disc, a broach handle and a broach holder. The broach disc is detachably arranged on the broach handle. One end of the broach holder is detachably arranged on the broach handle and is positioned and connected with the broach disc. The other end of the broach holder is detachably connected with one end of the broach bar. The other side of the broach bar is detachably arranged on a machine tool. The application solves the problems of single broach manufacturing difficulty, multi-broach tool changing inconvenience, high manufacturing cost and high labor intensity when the conventional internal broach is used to broach a large aperture and a long-ratio hole with a ratio greater than 5 times. When the aperture is greater than 100 mm and the long-ratio is greater than 25 times, the application solves the bottleneck problem of being unable to manufacture. The broaching part and the non-broaching part are separated. The working part and the non-working part are clamped and loosened by hydraulic pressure. There is no pipeline winding, and the disassembly and assembly are convenient, and the labor intensity of workers is low.

The utility model discloses a high-precision numerical control broaching edge grinding machine, and relates to the technical field of broaching edge grinding machines. Comprising a grinding machine base, a machining mechanism used for the high-precision numerical control broaching edge grinding machine is arranged on the grinding machine base, the machining mechanism comprises a machining assembly, and the machining assembly comprises a supporting platform fixed to the upper end face of the grinding machine base. The grinding wheel and the broach are prevented from being damaged due to overheating, meanwhile, the spraying of the water source can play a role in lubrication, friction between the grinding wheel and the broach is reduced, grinding efficiency and quality are improved, grinding precision and surface quality are improved, and chippings in air are effectively reduced, so that the working environment is improved, and harm of dust to health of operators is reduced. A water source containing waste chips directly flows into the water collecting shell through the through holes to be collected, and the waste chips and sewage can be rapidly cleaned away.

The application discloses a kind of cutting performance prediction methods of flocking broach.The method includes the following steps: one, the effective contact length of the tested broach in cutting process is obtained.Two, the transduction coefficient for evaluating the heat dissipation capacity of the tested broach is obtained.Three, the broaching performance of the tested broach is judged.The application considers the various parameters of broach rake face flocking and the factor parameters of lubricating fluid, constructs the temperature field mathematical model of flocking broach, and realizes the accurate evaluation of temperature field in the cutting process of flocking broach through transduction coefficient.The application can accurately obtain the effective contact length and transduction coefficient of flocking broach by constructing two mathematical models, and evaluate the cutting performance of flocking broach and provide corresponding optimization scheme for flocking broach.The broaching tool designed for the size of horizontal broaching machine integrated broach realizes the effects of optimizing and reforming traditional broach, convenient disassembly and assembly and replacing single-tooth broach.

The invention relates to the technical field of broach grinding machines, in particular to a seven-axis linkage device for a numerical control broach grinding machine, a supporting seat body is further arranged on a control rail, and the supporting seat body is positioned through an arranged regulation and control positioning assembly; the auxiliary mechanism is used for conducting auxiliary supporting on the broach workpiece. Limiting is carried out through matched use of the driving tip and the rotating tip, and on the basis of limiting, flexible support is provided for a broach workpiece through matched use of the arranged supporting seat body and the auxiliary mechanism, so that the influence caused by vibration in the machining process is avoided; when the broach workpiece is rotated, the broach teeth of the broach workpiece are prevented from being scratched and damaged; the method is achieved through cooperative use of the arranged auxiliary roller and the flexible assembly. Besides, a positioning effect is provided for the supporting seat body through the arranged regulating and positioning assembly, the supporting seat body is slidably adjusted on the control rail according to actual machining requirements, and after the supporting seat body is adjusted to a proper position, the position of the supporting seat body is positioned.

This invention discloses a tenon and grooving broach and its atomizing cooling structure. Addressing the technical problem in existing technologies where coolant struggles to penetrate the narrow gap between the broach head and the workpiece, the invention incorporates a main coolant channel, a main compressed gas channel, coolant branch channels, compressed gas branch channels, and a compressed gas loop within the broach body. Each coolant branch channel includes a gas-liquid mixing chamber with an inverted cone and a fan-shaped slit outlet at its top, forming a nozzle structure. Each compressed gas loop contains multiple inclined injection channels for injecting compressed gas into the gas-liquid mixing chamber. During operation, the coolant and compressed gas mix and atomize in the gas-liquid mixing chamber, forming finer, higher-pressure atomized particles that are projected onto the broach head surface through the nozzles, achieving effective cooling of the broach head. Through this atomizing cooling structure, this invention effectively reduces the operating temperature of the tenon and grooving broach, extends its lifespan, and improves machining quality and surface integrity.

The invention relates to the related technical field of numerical control lathes, in particular to an air floating type tailstock structure for a numerical control broach grinding machine, which comprises guide rails, a sliding seat, a base, a tailstock main body and a telescopic electric cylinder, a connecting lug is integrally formed on the side edge of the sliding seat, and the connecting lug on the sliding seat is fixed to the lower surface of the base through a first-stage bolt. The upper air cavity and the first-stage mounting groove are formed in the sliding seat, and the first-stage air floating plate is mounted in the first-stage mounting groove, so that air is supplied to the upper air cavity through the first-stage air supply equipment and is supplied to the upper air cavity through the first-stage air floating micropores in the first-stage air floating plate, and a layer of air film is formed between the guide rail and the sliding seat through the air; therefore, the operation friction resistance of the sliding seat is effectively reduced, the mechanical abrasion of the guide rail and the sliding seat is effectively reduced, the service life of the structure is prolonged, and the movement flexibility of the sliding seat is improved.

This utility model discloses a quick-change fixture for a knife grinding machine, comprising: an integrated tool holder with an assembly groove on it, wherein a knife is installed at the bottom of the cavity of the assembly groove; a downward positioning mechanism mounted on the knife; a mounting plate fixedly mounted on one side of the integrated tool holder; a rotary propulsion mechanism inserted into the top of the mounting plate; and a pressing mechanism connected to one end of the rotary propulsion mechanism. This utility model utilizes the combined arrangement of the downward positioning mechanism and the pressing mechanism, and by optimizing the fit between the pin and the center hole of the diamond blade, eliminates assembly gaps, ensuring consistent clamping positions each time, significantly improving the uniformity of blade dimensions after grinding. The linkage design of the elbow clamp and the connecting mechanism allows the downward positioning mechanism to clamp or release the knife simply by lifting and rotating the elbow clamp, greatly shortening the clamping time.

The utility model discloses a kind of circular-arc blade of broach, including blade main body, the blade main body includes main cutting edge, positioning groove, locating surface and tool tooth, the main cutting edge is the circular-arc blade being set in tool tooth top, the tool tooth is evenly arranged along blade main body long side side, and both sides tool tooth is set with blade central axis as axis symmetry, axially extending chip flute is equipped between adjacent tool tooth, the locating surface one side is equipped with main cutting edge rake face, the main cutting edge rake face extends to tool tooth, and main cutting edge rake face and locating surface transition connection;The positioning groove is symmetrically set in blade main body short side side.The utility model's cutting edge is high in strength, not easy to wear, and the cutting life of blade is high, improves the cutting stability and processing efficiency of blade.

The invention relates to a broach quick dismounting device applied to a machine tool, and belongs to the technical field of machine tool machining, the quick dismounting device structurally comprises a broach lathe, a quick dismounting mechanism is arranged on the broach lathe, a quick dismounting machine comprises a driving assembly, a quick dismounting assembly is arranged at one end of the driving assembly, and the quick dismounting assembly comprises an unlocking head; a hollow cavity is formed in the unlocking head, a receding groove is formed in the position, on the outer ring of the hollow cavity, of the unlocking head, a first sliding hole penetrating through the hollow cavity is formed in the unlocking head, an unlocking disc and multiple sets of balls are arranged in the hollow cavity, and multiple sets of unlocking holes are formed in the side wall of the hollow cavity in the circumferential direction. The multiple sets of balls are arranged in the multiple sets of unlocking holes in a sliding mode, the unlocking disc is arranged in the hollow cavity in a sliding mode and abuts against the balls, and the driving assembly is used for driving the unlocking disc to slide; the tool changing device has the technical effects that the tool changing efficiency is improved, and the tool is stably clamped.

The invention relates to a variable-shape groove broaching method capable of changing the depth of an inner hole and a machining tool, and belongs to the field of deep hole broaching machining. The cutter comprises a brush (1), a plug (2), a front guide sleeve (3), a spring (4), a compression screw (5), a broaching blade (6), a body (7), a rear guide sleeve (8), a cutter bar (9) and a mandrel (10), the connected broaching blade extends into a steel pipe along with the cutter bar (9) and the mandrel (10) under the driving of a spindle box (12) according to the length and depth size of a groove, the spindle box (12) drives the cutter bar (9) and the mandrel (10) to move towards the left end together, and the groove broaching blade (6) and the body (7) are pulled into the steel pipe. The method has the remarkable effects that the machining precision of the depth-variable large-width special-shaped long groove of the inner hole of the ultra-long steel pipe is greatly improved, and the tool consumption cost is reduced.

The utility model provides a chip collecting box of a broach and a notch broaching machine. The chip collecting box of the broach comprises a filter screen, a first box body, a plurality of second box bodies and a plurality of installation frames. The first box body is provided with an inner cavity, and a via hole for a broach to penetrate through is formed in the inner cavity. The second box bodies are attached to one another to be installed in the inner cavity and detachably connected with the first box body. The plurality of mounting frames are arranged on the plurality of second box bodies in a one-to-one correspondence manner, each mounting frame comprises an opening part and a plurality of mounting parts, the opening parts are used for exposing the second box bodies, and the plurality of mounting parts are arranged around the opening parts at intervals and are used for mounting the filter screens so as to filter lubricating oil containing metal filings. The scrap collecting box solves the technical problems of mixed pollution and inconvenience in operation of a traditional scrap collecting box.

An automated grooving device for a tool pliers includes linearly fixedly arranged grooving dies. The grooving dies include a fixed-tooth die, a single-variable die, and a double-variable die. The single-variable die is located below the fixed-tooth die, and the double-variable die is located below the single-variable die. The cross-sectional shape of the fixed-tooth die remains constant. The cross-sectional height of the single-variable die is constant, but its cross-sectional width gradually narrows along its length. Both the height and width of the double-variable die gradually narrow along its length. Oil nozzles are spaced apart in the middle of the grooving dies. In this invention, the cross-section of the grooving dies is designed with a gradual change. By gradually increasing the feed rate during grooving and cutting the jaws, cutting resistance and cutting chips are reduced. The oil nozzles apply lubricating oil to the jaw teeth during the grooving process, improving the smoothness of grooving and reducing problems such as tooth surface roughness and dulling.

A broach (20) or broach segment (20) has a spine (22). A longitudinal array of teeth (40-1...40-n) protrude from the spine (22), each said tooth (40-1...40-n) having: a first face and an opposite second face; and a distal surface joining the first face and second face; and at least some of the teeth (40-1...40-n) being firtree teeth (40-1...40-n) and have a peripheral trench adjacent the cutting edge of the at least one tooth (40-1...40-n).

The utility model discloses a lever type high accuracy broaching tool belongs to mechanical technical field. It includes broach body, and the broach body is strip -shaped, and the central position of broach body is provided with a cylindrical pinhole, and the direction of pinhole is consistent with the width direction of broach body, and the one end of broach body is the part of tool bit, and the top end of tool bit part is the cutting edge, and the side of tool bit part near the body of broach body is provided with an arc chip pocket, and the other end of broach body is equipped with a gap -like positioning groove, and the positioning groove is horizontally arranged, and in the above of positioning groove, the vertical direction positioning hole is provided in the broach body, and the positioning hole is located the intermediate position of this end of broach body, and the broach body is two, and two broach bodies are installed on the broaching tool head device through respective pinhole, and two broach bodies are 180 degree symmetrical arrangement. The utility model can guarantee the consistency of each processing size of part, and satisfies the precision requirement of part size.

The invention relates to the technical field of waveguide tube machining, in particular to a broach for machining an inner hole of a waveguide tube, which comprises a broach bar and blades fixed on the broach bar, the blades are divided into transverse blades and longitudinal blades, two transverse blades symmetrically or adjacently arranged on the upper side and the lower side of the broach bar are a pair, and the broach bar is provided with a plurality of pairs of transverse blades along the axial direction. Two longitudinal blades symmetrically or adjacently arranged on the left side and the right side of the cutter bar form a pair, the cutter bar is provided with a plurality of pairs of longitudinal blades in the axial direction, the transverse blades and the longitudinal blades are arranged in an axial staggered mode, a pair of transverse blades and a pair of longitudinal blades adjacent to the transverse blades form a blade set, and the cutter bar is provided with a plurality of blade sets in the axial direction. The blade group is used for gradually cutting the inner hole of the waveguide tube to the required size and shape, and the cutting amounts of the blades in the blade group are the same. The tool has the beneficial effects that the multiple groups of transverse and longitudinal blades which are axially staggered are arranged on the tool bar, so that the four side surfaces of the inner hole of the waveguide tube are cut at the same time, and the machining efficiency is remarkably improved.

An automatic slotting device of a tool tongs comprises linearly fixed arrangement of tooth slotting cutter dies, the tooth slotting cutter dies comprising a fixed tooth cutter die, a single-variable cutter die and a double-variable cutter die, the single-variable cutter die being arranged at the lower end of the fixed tooth cutter die, and the double-variable cutter die being arranged at the lower end of the single-variable cutter die, the cross-sectional shape of the fixed tooth cutter die being constant, the cross-sectional height of the single-variable cutter die being constant but the cross-sectional width gradually narrowing along the length direction, and the cross-sectional height and width of the double-variable cutter die both gradually narrowing along the length direction, and oil nozzles being arranged at intervals in the tooth slotting cutter dies. In the present application, the cross-section of the tooth slotting cutter dies is gradually variable, and by gradually increasing the feed amount when slotting the tongs, the cutting resistance can be reduced, and the cutting iron filings can be reduced, and the oil nozzles can coat lubricating oil on the tine surface during the slotting operation, so as to improve the smoothness of the slotting, and reduce the roughness and passivation of the tine surface.

The application discloses a flying wing wheel mounting hole key groove processing device and method, and relates to the field of key groove processing devices.The processing device comprises a cutter shaft, a key groove cutter, a guide key, a shaft sleeve pressing die and a nut.A mounting groove is formed on the surface of the cutter shaft, and the mounting groove extends in parallel to the axial direction of the cutter shaft;an outer thread coaxial with the axis of the cutter shaft is also formed on the surface of the cutter shaft;the key groove cutter is detachably installed in the mounting groove on the surface of the cutter shaft;the guide key is placed in the mounting groove on the surface of the cutter shaft and is in sliding fit with the mounting groove;the shaft sleeve pressing die is provided with a through hole for mounting the cutter shaft, and a guide groove matched with the guide key is formed on the inner wall of the through hole, so that the outer contour of the guide key is in sliding fit with the inner contour of the guide groove;the nut is sleeved on the outer thread of the cutter shaft.During processing, the key groove cutter is driven to cut into the flying wing wheel by tightening the nut, the guide key guides, and the waste is discharged through the guide groove.The application is simple to manufacture, convenient to process and high in processing efficiency.

The invention relates to a broaching tool arrangement (10) for a punching machine (90) comprising an upper tool (91) and a lower tool (92) on which a punch (96) and a die (95) for punching workpieces (W) from a base material (G) are arranged, wherein the upper tool (91) and the lower tool (92) are movable away from each other after punching, forming a gap (93) between the upper tool (91) and the lower tool (92), wherein the broaching tool arrangement (10) comprises a slide (40) with a broaching tool (70) for broaching at least one punched workpiece (W) from the gap (93) between the upper tool (91) and the lower tool (92), which is guided linearly along a guide axis (F) on a linear guide (11) and driven by a slide drive (100), and wherein the linear guide (11) comprises a pair of linear guide elements at a transverse distance (Q) to the guide axis (F). (12, 13) each has a slide part (41,42) of the slide is linearly guided, the slide having a slide base (50) connected to the slide parts (41, 42), which has the broaching tool (70) or a tool holder (51) for detachably fastening the broaching tool, wherein the linear guide (11) has at least one connecting element (16, 17, 45, 47) for fixing the linear guide elements (12, 13) at a transverse distance (Q) from each other. It is provided that the at least one connecting element (16, 17, 45, 47) is designed to fix the linear guide elements (12, 13) at at least two different transverse distances (Q1, Q2) for geometrically adapting the broaching tool arrangement to a receptacle (90A) for the broaching tool arrangement arranged on the upper tool (91) or lower tool (92).

The invention relates to the technical field of tool clamping, and provides a broach mechanism and a machine tool. The broach mechanism comprises a shaft body assembly which is provided with a containing cavity, a first opening and a second opening, and the first opening and the second opening communicate with the containing cavity; the clamping assembly is arranged in the containing cavity, and the clamping assembly is provided with a clamping end and a connecting end which are oppositely arranged in the axial direction of the shaft body assembly; the pre-tightening piece is used for applying an acting force towards the second opening from the first opening to the connecting end; the driving end of the driving assembly is inserted into the containing cavity through the second opening and is in threaded connection with the inner wall of the containing cavity, the rotating axis of the driving end is parallel to the axial direction of the shaft body assembly, and the driving end is located on the side, close to the second opening, of the connecting end so as to drive the shaft body assembly to move from the first opening to the second opening; and the clamping end loosens the cutter handle. According to the scheme, the clamping and loosening efficiency of the cutter handle is improved.

The invention discloses a long and thin push broach for machining a U-shaped opening and a machining process. The long and thin push broach comprises cutting teeth and correction teeth which are arranged on a broaching section of a long-strip-shaped push broach body. Seen from the length direction parallel to the push broach body, the outer contour shape of the cutting teeth and the correcting teeth is a U-shaped outer contour with three cutting edges, and the three cutting edges of the U-shaped outer contour comprise a circular arc section cutting edge and a pair of straight line section cutting edges which are connected to the two ends of the circular arc section cutting edge and are parallel to each other; a rectangular section guide strip is arranged on the back side of the long-strip-shaped push broach body in the longitudinal direction; a cutting edge contour plane formed by the arc section cutting edge and the pair of linear section cutting edges is obliquely arranged relative to the transverse direction of the strip-shaped push broach body; in the machining process of the long and thin push broach, the grinding machining method that the grinding heads alternately turn back and move is adopted for grinding machining of the chip containing groove, the time sequence nonuniformity of grinding machining heat distributed on the two side faces of the push broach body can be reduced, and the machining precision of the long and thin push broach is improved.

The application provides a disc spring, a broach system and a numerical control lathe, comprising a first outer wall and a second outer wall, the first outer wall and the second outer wall are oppositely arranged along the axial direction of the disc spring, at least one heat dissipation groove is arranged on the disc spring, and the heat dissipation groove penetrates from the first outer wall to the second outer wall. The disc spring provided by the application can dissipate heat during work, prolongs the service life of the disc spring, reduces the replacement and maintenance frequency of the disc spring, and further reduces the cost.

The utility model relates to the technical field of composite board machining, and discloses a composite board broach which comprises a broach rod, a blade block is fixedly installed on the upper surface of the broach rod, a hollow column is fixedly installed at the right end of the broach rod, a rectangular groove and a clamping opening are formed in the inner wall of the hollow column, and the rectangular groove and the clamping opening are arranged in a penetrating mode. A solid column is arranged on the inner wall of the hollow column in a sliding mode, a pull ring is fixedly installed at the end, away from the hollow column, of the solid column, and the solid column and the hollow column are installed through a connecting assembly. The bottom face of the cutter bar is provided with a groove, the front face of the cutter bar is provided with a first ventilation groove, and the back face of the guide rod is provided with a second ventilation groove. And the blade block is made of a hard alloy material. And a clamping column is fixedly mounted at the left end of the solid column. The clamping blocks are extruded until the clamping blocks move into the rectangular grooves and are completely separated from the bayonets, and at the moment, the cutter bar is drawn outwards, so that the dismounting work can be smoothly completed, and the operation is extremely convenient.

The application discloses a combined blade fine broach for broaching fir-tree type mortise, which comprises a broach body and a broach tooth part, the broach tooth part comprises a profile cutting area and a tooth crest cutting area arranged in sequence along the length direction of the broach body, the profile cutting area is used for broaching the two side profiles of the mortise, the tooth crest cutting area comprises a tooth crest cutting part and a tooth crest shaping part used for broaching the top of the mortise and arranged in sequence along the length direction of the broach head, the tooth crest cutting part is located between the profile cutting area and the tooth crest shaping part, and the tooth crest height of the tooth crest cutting part is higher than the tooth crest height of the profile cutting area. Since the profile cutting area and the tooth crest cutting area of the combined blade fine broach are integrally machined, the machining precision can be guaranteed to be consistent, so that the generation of "tool joint marks" in the broaching process is avoided, and then the mortise is step by step finely machined through the profile cutting area and the tooth crest cutting area, so that the final profile size, machining precision and surface quality of the mortise are guaranteed.

Broaching needle (10) for machining a workpiece (11) by broaching, with a shaft (12) extending along a longitudinal axis (20) and several cutting inserts (14) which can be detachably mounted on the shaft (12) so that in a mounted state they are arranged one behind the other along the longitudinal axis (20), wherein the shaft (12) has a cam to implement a rotation protection (19) of the cutting inserts (14) which has a cross-sectional shape that deviates from a circular cylindrical shape.

The present application provides a tenon groove broach structure suitable for dry broaching heat pipe cooling without coolant, in order to solve the technical problems that it is difficult for the coolant to enter the narrow gap between the broach head and the machined part when the coolant is sprayed on the cutter body at the cutting position during the processing of turbine disc tenon groove by broaching, the heat dissipation is not ideal, the blade edge is overheated and burned, the broach life is reduced, and a large amount of cutting fluid is used, the cooling cavity and a plurality of heat pipe components are arranged on the broach body, the heat generated by the broach head is transmitted to the condensing heat dissipation pipe segment in the cooling cavity through the phase change medium in the heat pipe components by the phase change heat transfer principle of the heat pipe, and the condensing heat dissipation pipe segment is cooled by the cooling gas in the cooling cavity, so that the temperature of the broach head is reduced without using the coolant, and the dry broaching without coolant is realized during the processing of turbine disc tenon groove.

The invention relates to the technical field of aeronautical manufacturing and assembling, and discloses a method and a device for drawing a large interference hole of an integral fuel tank, an initial hole perpendicular to the surface of a component is machined at the design position of the large interference hole of the integral fuel tank of an aircraft in advance, then the initial hole is expanded, and the hole diameter is expanded to be close to the design size of the final large interference hole; and a broach vertically penetrates into the broached primary hole and is pulled out in the penetrating direction, so that the final drilling of the high-precision large-interference hole is completed. According to the method, a traditional reaming process is replaced by a process route of primary hole-fine hole reaming-final hole broaching, high-quality holes with the precision reaching the H7 level or above can be efficiently and stably machined, the control requirement of large interference holes is met, the tightness and sealing reliability of large interference connection between parts of the whole oil tank are effectively guaranteed, and the service life of the whole oil tank is prolonged. The problem of leakage easily caused by sealing failure is avoided, large interference connection and assembly of the whole fuel tank are ensured, and the flight and safety performance of an aircraft is improved on the whole.