44results about How to "Guaranteed contour" patented technology

The invention belongs to the processing technology of aero-engine compressor blades. The invention provides a method for processing an aero-engine compressor arc-tooth tenon blade, which includes: clamping the blade wool material with a root process boss and a blade tip process boss in a numerical control On the milling machine, carry out rough milling on the air inlet and exhaust sides of the blade; clamp the blade after rough milling in the positioning casting fixture, and pour the blade with low melting point alloy, and the shape of the blade after casting is a cuboid; CNC milling machine Clamp the poured cuboid blade, rough mill the tenon and edge plate at the root of the blade, and remove the technological boss at the root of the blade; finely grind the tenon into an arc tooth shape on the six-axis slow-feed grinding center; place the cuboid blade on the Put it into the melting furnace, heat it to 180°C, and take out the blade after the low-melting point alloy is melted; use the tenon to position and clamp, and finely grind the intake side and exhaust side on the CNC abrasive belt grinder; The blade tip is processed on the machine tool, and the process boss is removed.

The invention relates to a forming tool and a method for preparing a rectangular hollow composite tubular member by using the forming tool. The forming tool comprises a body and an auxiliary piece. The body comprises a bottom plate, a left side baffle, a right side baffle and an upper baffle which are matched with one another to form a rectangular cavity. The upper ends of the left side baffle andthe right side baffle are both designed to be in a corner form extending inwards. The left side baffle and the right side baffle are detachably connected with the bottom plate, and the upper baffle is detachably connected with the left side baffle and the right side baffle. The auxiliary piece comprises a left auxiliary stop block, a right auxiliary stop block and an auxiliary flat plate. The left auxiliary stop block and the right auxiliary stop block are detachably connected with the upper end of the left side baffle and the upper end of the right side baffle respectively. The auxiliary flat plate serves as an independent piece to be placed in the rectangular cavity, and when the auxiliary flat plate translates to the upper side, the left side and the right side of the auxiliary flat plate can be clamped by the corners of the left side baffle and the right side baffle, and the length of the auxiliary flat plate is not smaller than that of the bottom plate. By means of the forming tool, the high-quality rectangular hollow tubular member can be obtained.

The invention discloses a machining method for a nozzle ring blade. The machining method comprises the following steps that the outer circle allowance of the blade end is removed; the shaft end outercircle and end face allowances are removed, and subsequent machining locating faces are obtained; the nozzle ring blade is located and clamped by a milling tool, the shaft end outer circle and the large end face serve as locating faces, the large end face is flattened, the blade is milled roughly first, then finish milling is conducted for the blade profile, and the profile tolerance of the bladeprofile is ensured; finish turning is conducted on the shaft end face, the outer circle and a shaft end face chamfer; the shaft end face is flattened, and finish turning is conducted on the blade endouter circle and an annular groove; the nozzle ring blade is clamped by a turning tool, the blade profile serves as a locating face, the top end of the blade is flattened, and a shaft end flat squareis formed by cutting; and a bench worker removes burrs. The special milling tool and the turning tool are designed, thus the nozzle ring blade is milled, the shaft end flat square is machined, and meanwhile, an auxiliary measuring tool is designed to solve the problem of partial dimension measurement.

An adaptive test bench for a lifeboat diesel engine, including a base, a load device, and a horizontal parallel iron; there are two horizontal parallel irons, which are fixedly connected to four bracket seats, and correspond to the mounting feet of the diesel engine one by one; the four bracket seats are at least Two adjacent bracket seats are provided with adjustment devices; the adjustment devices are arranged in sequence from top to bottom: screw sleeves, fixed nuts, nut seats, and positioning pins; the upper half of the inner wall of the screw sleeves is threaded, and the lower The half section is a light hole, the upper section of the outer wall of the tube is a hexagonal column, the middle section is a left-handed external stud, and the lower section is a cylinder; the upper hole of the fixing nut is provided with a left-handed internal thread, and the lower hole is a cylindrical hole, and the left-handed internal thread of the upper hole is connected to the middle section of the screw sleeve. A thread pair is formed, and the cylindrical hole of the lower hole and the lower column of the screw sleeve form a cylindrical pair; the fixed nut is fixedly connected to the nut seat; the nut seat is fixedly connected to the support frame by a positioning pin. The invention utilizes the adjustment and support function of the adjustment support to meet the installation requirements of the diesel engine test and can effectively prevent the installation screws from loosening.

The invention discloses a method for forming a thick-wall large-diameter pipeline with a large bending angle and a small bending radius. The method for forming the thick-wall large-diameter pipeline with the large bending angle and the small bending radius comprises two aspects, namely design of a pipe blank and design of a mould, wherein the pipe blank is a straight pipe, a step is formed in the outer diametric plane and used for mounting and clamping; the mould is divided into a cross beam part, a connecting rod part, a bending die part and a core rod part; the connecting rod part comprises a left connecting rod and a right connecting rod, the bending die part comprises a left bending die and a right bending die, the core rod part comprises a left core rod and a right core rod, the left connecting rod is connected between the cross beam and the left bending die, the right connecting rod is connected between the cross beam and the right bending die, and the lower ends of the left bending die and the right bending die are jointly pivoted and rotate together by virtue of one supporting pin shaft; and the pipe blank is placed in pipe penetrating cavities of the left bending die and the right bending die, and the left core rod and the right core rod respectively penetrate through the pipe blank from the left end and the right end. The method for forming the thick-wall large-diameter pipeline with the large bending angle and the small bending radius has the advantages that a simple mould is adopted for converting a provided pressure into a bending forming force of an elbow and the related technology is applicable to a large-angle bent pipeline with a thick wall, a large diameter and a small bending diameter ratio.

The invention provides a machining technology of a cam-mould special-shaped concave-mould. The machining technology sequentially comprises the following processes of material sawing, rough turning, special shape rough milling of a machining center, heat treatment, numerical-control finish turning, plane abrasion, pressure distribution, special shape finish milling of the machining center, grinding, pressure withdrawing, S-N co-diffusion, polishing and secondary pressure distribution. According to the machining technology of the cam-mould special-shaped concave-mould, the profile tolerance of the concave-mould after the follow-up special shape finish milling of the machining center is guaranteed through the pressure distribution process in the concave-mould machining technology, so that the profile tolerance of the concave-mould is ensured to be within 0.02 mm, therefore the profile tolerance of a cam forge piece is guaranteed, further the product profile tolerance after the follow-up heat treatment is conducted is ensured, and the production quality is improved.