2069 results about "Hobbing" patented technology

A hob type cutter blade for use in a hobbing process. The cutter blade is formed with at least one cooling passage that permits the flow of coolant through the cutter blade to the contact surface reducing the heat generation as well as dissipating any heat already produced during the hobbing operation. During manufacturing, the cooling passage is sintered into the carbide cutter blade without the addition of separate operation.

The invention relates to a large gantry polar-coordinate digital-control milling, hobbing and grinding gear combined machine adopting a beam both-side bearing structure by respectively hanging a milling gear headstock and a hobbing and grinding gear headstock at the left side and the right side of a beam. Compared with the prior art, the invention adopts the design concepts of polar coordinates and modularization and enables the connection sizes of lathes, bases, and the like as well as Y-direction and Z-direction feeding systems of a milling gear and a hobbing and grinding gear to have interchangeability, thereby decreasing the manufacture cost, lowering the assembly difficulty and improving the machining precision and the machining efficiency of large-module large-diameter gears. The invention integrates the machining characteristics for roughly and finely machining a milling gear, precisely spreading into a hobbing gear and molding a grinding gear with respective optimal process velocities and reasonably arranges a milling, hobbing and grinding gear headstock transmission chain capable of satisfying the requirements for molding the milling gear, spreading into the hobbing gear and molding the grinding gear.

The invention relates to a distribution method and a distribution structure of high-pressure water jet in a heading machine cutterhead belonging to the field of the machine design, and in particular relates to a distribution method and a distribution structure of high-pressure water jet in the heading machine cutterhead. The distribution method in the heading machine cutterhead is free from changing the structural form of the existing rock heading machine cutterhead body and the layout and installation way of a hobbing cutter and a material collection port in the cutterhead, and a plurality of high-pressure water nozzles are distributed on the blank position of the end surface of the existing cutterhead structure. The heading machine cutterhead structure consists of the plurality of high-pressure water nozzles, a hobbing cutter, a material collection port and a plurality of water pipes. The rock heading machine cutterhead structure combining the high-pressure water jet and the hobbing cutter utilizes the high-pressure water to force rock joints to expand, so that the rock is easy to crush, the abrasion of the hobbing cutter is reduced, the construction efficiency is improved, and the construction cost is reduced. The water flow formed after the high-pressure water compresses the rock covers an entire digging surface, so that the working surface of the hobbing cutter and the heading machine cutterhead can be cooled, and a dustproof cooling effect on the construction environment can be realized.

The invention discloses a flying-shear main-transmission gearwheel steel and a preparation method thereof. The flying-shear main-transmission gearwheel steel comprises the following elements in percentage by mass: 0.10-0.20% of C, 2.00-3.00% of Cr, 2.50-3.50% of Ni, 0.4-1.00% of Mo, 0.10-0.40% of Si, 0.40-1.00% of Mn, at most 0.25% of Cu, at most 0.1% of Al, at most 0.020% of P, at most 0.015% ofS, at most 30ppm of O, at most 100ppm of N and at most 2ppm of H. The preparation method comprises the following steps: (1) smelting according to the percentage by mass to obtain a forging stock; (2)forging; (3) carrying out normalizing heat treatment; (4) carrying out gear hobbing; (5) carrying out surface carburization quenching heat treatment; and (6) carrying out gear grinding. The inventionenhances the bearing capacity and reliability of the gearwheel, and satisfies the production demands of high-carbon high-alloy steel and enhanced specifications, thereby having wide popularization and application prospects.

The invention relates to an alloy for a cutter ring of a disk type hobbing cutter, which comprises the following components in percentage by mass: 0.4-0.46% of C, 0.45-1.0% of Si, 0.48-0.74% of Mn, 1.3-5.4% of Cr, 0.4-1.4% of Mo, 0.86-1.33% of V, 0.06-0.54% of Nb, 0-0.05% of Al, 0-3% of Ni, no more than 0.009% of S, no more than 0.03% of P and the balance of Fe. The preparation method comprises the following steps: performing vacuum induction smelting on the raw materials, casting, forging, performing spheroidal annealing, performing gas carburization, performing vacuum quenching, and performing double tempering. The carburized layer of the prepared cutter ring of a disk type hobbing cutter is 1mm thick, the surface hardness of the carburized layer can be up to 60-63HRC, the internal average hardness is higher than 55HRC, and the impact toughness aku is up to 15-22J/cm<2>; and the shield cutter ring is high in hardness and favorable in toughness.

The invention discloses a main shaft device for a numerical controlled gear hobbing machine. The main shaft device comprises a cutter bar assembly, a cutter bar assembly clamping mechanism and a cutter changing mechanism, wherein the cutter bar assembly comprises a cutter bar, a hobbing cutter, a cutter regulating pad, an axle sleeve, a locking nut and a cutter bar blind rivet; the cutter bar assembly clamping mechanism consists of a square key and a claw assembly; and the cutter changing mechanism consists of a pull rod, a piston rod, a disc-shaped spring, a hydro-cylinder body, a flange plate, a bracket, a rotary joint and a spacing switch. The main shaft device has the advantages that: a hydrostatic bearing is arranged in the main shaft structure of the high-accuracy numerical controlled gear hobbing machine, so the main shaft device can constantly work under a heavy-load cutting condition; a main shaft has high accuracy and good accuracy retaining ability; and the cutter bar assembly with the hobbing cutter is arranged and set outside a machine in a cutter workshop; the cutter bar assembly is subjected to whole cutter changing on the gear hobbing machine; and the setting assisting time of the hobbing cutter does not occupy the total part machining time of a machine tool, so the whole machine tool has high working efficiency.

The invention discloses a method for manufacturing a bevel gear of an axle gear box for diesel locomotives, which comprises the steps of blank forging, blank heat-treatment, gear-blank processing, gear-shape processing, gear-end processing, gear-surface heat-treatment, precise reference modification and gear-shape finish-machining, wherein the step of blank heat-treatment comprises the sub-steps of normalizing and thermal refining; the step of gear-blank processing comprises the sub-steps of rough turning and finish turning; the step of gear-shape processing comprises the sub-steps of gear milling, gear hobbing or gear shaping; the step of gear-surface heat-treatment comprises the sub-steps of nitriding, surface quenching and tempering; the step of precise reference modification comprises the sub-steps of end face modification and centre hole modification; and the step of gear-shape finish-machining comprises the sub-steps of gear grinding and polishing. By using the method disclosed by the invention, the production efficiency of the bevel gear can be improved, and the consumption amount and production cost of raw materials can be reduced; and meanwhile, the method is simple in process, and the manufactured bevel gear is long in service life.

The invention discloses a quenching and tempering method in tooth punching process of a gear with a medium-hard tooth surface. The method comprises the following steps of: machining of a gear blank: roughly turning and drilling the gear blank after forging and normalizing treatments; rough turning and heat treatment of a tooth shape: roughly hobbing the gear to form the tooth shape; releasing needed grinding amount according to a tooth thickness; then quenching and tempering at medium and high temperature, wherein the heating process of the quenching is under the protection of a carbon potential atmosphere; and carrying out shot blasting after the heat treatment; finish machining of the tooth shape: firstly, finely machining a tooth shape assembling standard of the gear by semi-finish turning and accurate grinding; and then finely machining the tooth shape of the gear by tooth grinding. The gear manufactured by the method disclosed by the invention has the advantages that the hardness of the tooth surface and the tooth root is improved, the hardness of the quenched and tempered tooth surface ranges from about HB340-370, thereby solving the problem that the medium-hard gear hobbing tool with tooth surface hardness higher than HB320 is difficult to machine. As a process of hobbing before the heat treatment is adopted in the method, the hobbing efficiency is greatly improved and the tool loss is reduced.

The invention relates to a method for designing a rock breaking cutterhead combined by flexible expanding excavation hobbing cutters and water jets, and belongs to the field of design methods of full-fracture-surface-rock heading machine cutterhead structures. According to the design method, flexible multi-edge expanding excavation hobbing cutter assemblies and high-pressure water jet devices are combined to replace a side hobbing cutter of an original cutterhead to break rock, the side hobbing cutter is removed from the edge position of the original cutterhead, the first flexible multi-edge expanding excavation hobbing cutter assembly, the second flexible multi-edge expanding excavation hobbing cutter assembly and the third flexible multi-edge expanding excavation hobbing cutter assembly are installed, and the flexible multi-edge expanding excavation hobbing cutter assemblies are composed of flexible multi-edge expanding excavation hobbing cutters installed in a flexible multi-edge expanding excavation hobbing cutter protruding-out device, and the flexible multi-edge expanding excavation hobbing cutter assemblies are same in structure. On the cutterhead, the high-pressure water jet devices are installed on the two sides of the first flexible multi-edge expanding excavation hobbing cutter assembly, the two sides of the second flexible multi-edge expanding excavation hobbing cutter assembly and the two sides of the third flexible multi-edge expanding excavation hobbing cutter assembly respectively. The rock breaking cutterhead combined by the flexible expanding excavation hobbing cutters and the water jets is small in vibration, and therefore tunneling service life of the cutterhead is prolonged, noise is reduced, and economic losses in engineering are reduced.

The invention relates to a manufacturing technology of a novel hobbing cutter with a laser cladding WC wear-resistant coating. The manufacturing technology comprises the following steps: (1) manufacturing the hobbing cutter with a forging method, wherein the hobbing cutter is made of alloy steel; (2) carrying out peel removal cleaning treatment on surfaces to be machined of the intertooth space of an alloy cutter; (3) using a transverse flow CO2 laser, taking a numerical control machine tool as a workbench, and carrying out cladding wear-resistant strengthening treatment on the intertooth space of a cutter ring cutter, wherein the thickness of the WC cladding layer is 1.5-2.5mm; (4) carrying out performance detection on a composite coating. A laser surface cladding technology is adopted, and the tissues of a cladding coating mainly consist of carbides and a supersaturated solid solution superfine casting-state structure, wherein spherical tungsten carbide ceramics are of ultra-high hardness and uniformly distributed on a binding phase with extremely high hardness level, and also achieves an inhibition effect on abrasion, and the grinding resistance between hobbing cutter edges can be effectively improved; the binding phase is good in tenacity and high in strength, the formation of cracks can be effectively reduced, and the wear resistance and corrosive resistance of the hobbing cutter is improved, and the service life of the hobbing cutter is prolonged.

The invention discloses a shield cutter for a composite ground, which comprises a cutter head with a box body structure, wherein a hobbing cutter is arranged on the front face of the cutter head and comprises a plurality of single-blade standard hobbing cutters, a plurality of single-blade central hobbing cutters, a plurality of single-blade standard hobbing cutters and a plurality of single-blade eccentric hobbing cutters; the single-blade standard hobbing cutters are arranged on a cross cutter beam; the single-blade central hobbing cutters are arranged on a transverse I-shaped cutter beam positioned in the central area of the cross cutter beam; the single-blade standard hobbing cutters and the single-blade eccentric hobbing cutters are arranged in an edge area of the cross cutter beam; cutting knives are symmetrically arranged along the two sides of the cross cutter beam in the form of a concentric circle; edge scraping knives are arranged on the two sides of the cross cutter beam and at the middle positions of every two cutter beams of the cross cutter beam, on the edge of the front face of the cutter head; a plurality of radius retaining knives are arranged at the periphery ofthe cutter head; and an over cutter extended from the periphery is arranged in a box body of the cutter head. When the shield cutter is compared with the prior art, the boundary dimension of a cutterholder is reduced, the aperture opening ratio of the cutter is increased, the slag flowability is improved, and the wear resisting property of the whole cutter is improved.

The invention discloses high-speed steel for a high-toughness high-abrasion resistance hobbting cutter and a preparation method thereof. Compared with chemical components of traditional high-performance high-speed steel, the usage of noble metal cobalt is reduced, the content of carbon and vanadium with low prices are correspondingly added, so that the grain tissue of the high-speed steel can be refined, the hardenability can be increased, and the production cost can be reduced on the premise of guaranteeing corresponding functions of high toughness and high-abrasion resistance; and by utilizing the method for preparing the high-toughness high-abrasion resistance high-speed steel provided by the invention, the content of N is controlled to be lower than 150ppm, the formation of large-particle carbide is weakened, and the grindability is improved. The method for preparing the high-speed steel can be used for preparing hobbing cutter and gear and other rotary elements in automobile and mechanical engineering industries.

A radial coordinates digital control highly effective milling machine, hobbing composite machine, can improve machining efficiency 3-5 times, saving 50% budget, reducing land occupation 30%, with it composed of body, vertical post, horizontal feeding carriage, rotary working bench, highly effective milling and hobbing main shaft box module, with the vertical post on the body, rotary working bench fixed on the horizontal feeding carriage, highly effective milling and hobbing main shaft box module vertical to the feeding carriage. Through digital control interpolation and electronic gear box software, it realizes digital control machining.

The invention discloses a gripper type intelligent obstacle removing robot for an electric transmission line. The robot comprises a pedestal, wherein roller wheels are fixed above the pedestal; a hobbing cutter and grippers are arranged in front of the pedestal; the hobbing cutter is arranged on a longitudinal axis of the pedestal and is connected with the pedestal through a telescopic cantilever; two grippers are arranged below the hobbing cutter and are arranged on the two sides of the longitudinal axis of the pedestal respectively; and the back parts of the grippers are connected with an opening and closing driving device through a connecting rod component. The robot can walk on the line and hung obstacles are removed through cooperation between the opening and closing actions of the grippers and the telescopic action of the hobbing cutter. The gripper type intelligent obstacle removing robot for the electric transmission line has the advantages of simple structure, safe use and complete obstacle removal.

The invention provides a cutter friction abrasion testing machine for simulating shield construction conditions, a testing cutter and a testing method. The cutter friction abrasion testing machine comprises a hydraulic pushing oil cylinder and a rotating shaft, which is driven by a rotating motor, wherein a mud box is mounted on the hydraulic pushing oil cylinder; the top of the mud box is open; an upper test sample fixture is mounted below the rotating shaft; the upper test sample fixture is placed in the mud box from the opening at the top of the mud box; a lower test sample fixture corresponding to the upper test sample fixture in position is mounted at the bottom of the mud box; a plurality of testing cutter mounting holes are formed in one surface of the upper test sample fixture opposite to the lower test sample fixture; and the testing cutter mounting holes are uniformly formed in the upper test sample fixture; and the cutter friction abrasion testing machine for simulating the shield construction conditions, provided by the invention, has the advantages of simple structure and low testing cost, is convenient to measure abrasion loss and analyze follow-up abrasion surface appearance and is convenient to study abrasion failure behaviors and mechanisms of hobbing cutter rings.

The invention discloses a multimode test bed suitable for fourth generation and half and fifth generation rock breaking modes and aims at solving the technical problem that a multimode synthesized test-bed which can simulate fourth-generation and half heading machines and fifth-generation heading machines under different confining pressure working conditions and measure the rock breaking effect isnot invented in the prior art. The multimode test bed comprises a retainer, wherein the retainer is provided with a confining pressure increasing device, a mechanical arm and an adjustable cutter head; the adjustable cutter head is in sliding connection with the retainer; the retainer is connected with foundations through a climbing cylinder; one end of the mechanical arm is connected with the retainer; and a spray nozzle is arranged at the other end of the mechanical arm. According to the invention, the test bed as a whole can develop the fourth-generation and half heading machines by carrying out coupling rock breaking tests of water jet-hobbing cutters, particle impacting-hobbing cutters, pulse discharge-hobbing cutters, laser-hobbing cutters and the like on different rocks under different confining pressures and different penetration degrees, or can separately develop the fifth-generation heading machines by carrying out the rock breaking tests on a novel rock breaking mode, and acquires and analyzes hubbing cutter data in a laboratory environment.

The invention relates to a rear-mounting type self-positioning fixing device for a hobbing cutter of a shield machine, which is applied to the field of mechanical engineering technology of the shield machine. The whole device consists of a bolt, a wedgy pressing block, a heteromorphic nut, a hobbing cutter shaft, a tool apron, the hobbing cutter and a O-shaped sealing ring; the heteromorphic nut is matched with the O-shaped sealing ring for use; the hobbing cutter shaft is manufactured into a shape matched with a hobbing cutter shaft fixing part of a lateral panel of the tool apron and is contacted with the lateral panel of the tool apron for positioning; the third plane of the end of the hobbing cutter shaft is contacted with the lateral face of the wedgy pressing block; the hobbing cutter is arranged on the hobbing cutter shaft, is pressed and is fixed on the lateral panel of the tool apron through the wedgy pressing block in the process of screwing the heteromorphic nut by the bolt; and in the process, the hobbing cutter realizes automatic and accurate positioning of mounting simultaneously, and two ends of the heteromorphic nut are provided with the O-shaped sealing ring respectively which prevents the bolt and the heteromorphic nut from rusting and is convenient to detach in maintenance, thereby avoiding penetration of slurry and the like into a screw thread part in the construction process of the shield machine. The rear-mounting type self-positioning fixing device has the advantages of simple structure, accurate positioning, reliable mounting, easy replacement as well as convenient and rapid replacement and maintenance operation on the hobbing cutter in the construction process of the shield machine.

The invention discloses a TBM hobbing cutter stress online real-time monitoring apparatus and monitoring method. The apparatus comprises a support cushion block, an upper compaction block, a strain gauge, a strain instrument, a wireless emission module, a wireless receiving module and a monitoring computer. According to the monitoring method, by use of strain data of the support cushion block, obtained by the apparatus, through the monitoring computer, by use of a hobbing cutter system vibration differential equation established through a hobbing cutter vertical and swing-direction coupling vibration mechanical model, stress of a hobbing cutter during work is calculated, such that work personnel can monitor the stress condition of the hobbing cutter in real time and adjust driving parameters based thereon, damage is reduced, vibration is mitigated, and the driving efficiency is improved.