15 results about "% diameter reduction" patented technology

The invention relates to the field of screw forming, and discloses a screw cold heading forming process which is characterized by comprising the following steps: step 1, wire preparation and surface pretreatment: based on the requirement of screw forming on the surface quality of raw materials, a metal wire is treated by adopting a mechanical wiredrawing and chemical phosphating and saponifying composite process, and the surface of the metal wire is treated; surface oxide skin is removed, a lubricating film layer is formed, and the forming flowability and the service life of the die in the subsequent cold heading process are effectively improved. A raw material is subjected to spheroidizing annealing treatment in a continuous spheroidizing annealing furnace, internal pearlite is converted into spherical cementite, the ductility and deformation uniformity of the material are improved, then a continuous wire drawing machine is adopted for multi-stage drawing diameter reduction, a three-stage chemical phosphating-saponification treatment process is matched, a low-friction and high-adhesion lubricating film layer is formed, and the service life of the lubricating film layer is prolonged. And a stable material basis and a lubricating environment are provided for the subsequent cold heading process, so that the problems that the friction resistance generated in the forming process of a screw material is large, and a mold is quickly worn are solved.

This application relates to the field of metal bending component manufacturing technology, and discloses a method for controlling the bending radius in progressive forming of tubular materials by spinning and bending. The method includes the following steps: S1, obtaining an optimal combination of loading parameters affecting the forming quality indicators of the tubular material through orthogonal experiments; S2, establishing a regression function between the bending radius and the spinning and bending deformation parameters based on the optimal combination and the Maximin Latin square test results through stepwise regression analysis; S3, testing the regression function; if the test passes, obtaining the regression model of the bending radius; if the test fails, returning to step S2; S4, controlling the bending radius under the optimal loading parameter conditions using the regression model. This application incorporates a diameter reduction parameter into the control method, significantly improving the accuracy of bending radius control compared to existing geometric control models. It reduces the average error between tubular bending radius prediction and control from 10.28% to 5.2%, offering advantages such as high forming accuracy, wide applicability, and higher reliability.

An optimized simulation method for the internal high-pressure forming process of preformed aluminum alloy truck axle housing tubes includes the following steps: Step 1: Determine the basic simulation parameters and performance evaluation indicators, and clarify the initial dimensions, material properties, and key process variables of the tube blank; Step 2: Construct an ABAQUS simulation model and a sequential simulation process, establish a finite element model including geometry, material, mesh, and contact, and set up a multi-analysis step process that can sequentially simulate diameter reduction and internal high-pressure forming; Step 3: Perform bidirectional multi-slider diameter reduction simulation and parameter screening; Step 4: Perform preliminary preforming simulation and parameter optimization; Step 5: Perform a second internal high-pressure forming simulation, and based on the preliminary forming results, collaboratively optimize various parameters to obtain better second forming process parameters and final product parameters; Step 6: Compare and verify the simulation results and output the process parameter set. This invention reduces the number of experiments, saves investment, and produces qualified products more efficiently.

A production process of high ductility cold rolled ribbed steel bar, comprising the following steps: S1, the tail end of two adjacent rolls of raw materials is butt welded; resistance welding is used during butt welding, the heating time is 3s-60s, and the heating temperature is 600 DEG C-1000 DEG C; S2, the raw material is opened and descaled, and enters the rolling area after descaling; S3, the raw material entering the rolling area is first reduced in diameter, and the diameter reduction ratio of the diameter reduction is 0.66-0.97; S4, the steel bar after diameter reduction is formed and rolled at the same time, and the diameter reduction ratio of the forming rolling is 0.55-0.93; S5, the steel bar after forming rolling is heat treated at a temperature of 360-720 DEG C for 1-3s. The process can reduce the defective product rate, and effectively improve the product quality and production efficiency.

The invention discloses a cold heading forming method for a synchronizer locking pin, which is sequentially completed in a four-station progressive die: sealing a forced shrinkage lower section, and reducing by 50%; the upper section is subjected to open type hole shrinkage, a middle section cone is synchronously upset, and hole shrinkage is conducted by 29%-26%; and upsetting the middle-section cylindrical step. According to the method, cold heading one-time near-net forming is used for replacing traditional bar cutting, the material utilization rate is increased to 97% from 44%, the yield per shift is increased to 20000 from 1000, the machining cost is reduced by 58%, the size precision is high, the surface quality is good, and the method is suitable for mass production.

This invention discloses a continuous diameter reduction forming device for quartz glass rods, relating to the field of quartz glass rod processing technology. It includes an operating table, with a set of transmission components installed on the front and rear sides of the operating table's upper surface. Between the two sets of transmission components, from front to back, are sequentially arranged an electrofusion box, an air-cooling box, and a conductive track assembly. A quartz glass rod body passes through the electrofusion box. The inner cavity of the electrofusion box is provided with a first limiting ring, and the inner cavity of the conductive track assembly is provided with a second limiting ring. An adjustment mechanism is provided on one side of each of the first and second limiting rings. Continuous diameter reduction is achieved through the transmission components, the electrofusion box, and the air-cooling box. During diameter reduction, the first limiting ring simultaneously presses out annular protrusions as a source of compensating material. The second limiting ring, equipped with an S-shaped heat-conducting pipe, rotates and heats the protrusions, melting and uniformly coating them to achieve dimensional repair and automatically fill micro-defects, improving the uniformity and density of the wall thickness in the diameter reduction section.

The utility model relates to a hard alloy base body with central concave edge multi-rib, belonging to the technical field of petroleum and geological drilling tools. The upper end face of the base body is provided with a central conical boss, and the arc conical surface on the circumferential outer side is connected and transitioned through an annular convex rib. The arc conical surface is provided with a narrow radial convex rib and a radial wide inclined rib with two wider inclined surfaces and a central arc transition in the radial direction. The two convex ribs are annularly symmetrical, uniformly distributed and arranged at intervals. This structure can limit the load during work to the edge area outside the annular convex rib, the central area is less affected, can effectively block the crack expansion to the center, prevent the whole diamond layer from falling off, and avoid the diameter reduction of the drill bit due to ring abrasion. At the same time, the design of the narrow convex rib and the wide inclined rib improves the stress distribution, improves the bonding strength, and prolongs the service life of the composite sheet. The utility model has flexible and adjustable structure, strong adaptability, can significantly reduce the drill bit failure risk, improve the drilling efficiency, and has significant economic and social benefits.

A design and manufacturing method for a large-size surface composite coating sealing cable. The sealing cable adopts a three-layer Z-shaped wire structure design with a diameter ranging from 70mm to 140mm and an allowable deviation of 0% to +2%, far exceeding the 0% to +3% requirement in the EN123851-10 standard. The twist direction of the steel wires in each layer is opposite, and the diameter reduction of each layer is 0.05mm to 0.1mm, ensuring the diameter processing accuracy of each layer. The surface composite coating material uses high-density polyethylene with good thermal and light stability. Based on the measured diameter of the sealing cable, the coating thickness is 1 / 15 of the sealing cable diameter. It can be painted with the required color as needed. The mold adopts a pre-eccentric design to effectively solve the problem of uneven coating thickness caused by the weight of the sealing cable. This invention forms a dense and uniform plastic coating on the surface of the sealing cable, achieving a comprehensive leap in performance such as corrosion resistance, wear resistance, maintenance-free operation, and structural stability, making the sealing cable more suitable for high-end engineering requirements such as heavy loads, strong corrosion, and long service life.

To provide a trimming tool, a can manufacturing apparatus, and a trimming method capable of suppressing adhesion of metal powder to a die and reducing a forming load during diameter reduction after trimming.SOLUTION: A trimming tool 30 for trimming an opening of a cylindrical can W includes a cutting-edge 32a that cuts the opening of the can W while rotating around a central shaft C of the trimming tool 30 and forms a cut surface 104 facing one side in an axial direction in the opening, and the cutting-edge 32a extends toward one side in the axial direction as it goes outward in a radial direction.SELECTED DRAWING: Figure 3

The present disclosure relates to the technical field of drawing machines, and provides a drawing machine for zinc wire production, which includes a frame, a diameter reduction die arranged on the frame, and the diameter reduction die is used to form the zinc wire; a first clamping member is located at the feed end of the diameter reduction die, and a first roller is arranged on the frame; a second roller is arranged on the frame, and a first feeding gap is formed between the first roller and the second roller, and the first feeding gap is used to convey the zinc wire to the diameter reduction die, and the first roller and the second roller are both in contact with the zinc wire. After the zinc wire moves, it drives the first roller and the second roller to rotate. After the zinc wire breaks, the first roller and the second roller stop rotating; a conveying member is arranged on the frame, and the conveying member is used to convey the zinc wire through the first feeding gap and the diameter reduction die in sequence. Through the above technical solution, the technical problem in the prior art that the broken zinc wire flies out at high speed under the force of the continuous operation of the equipment during the zinc wire drawing process is solved.

The present invention provides a method for forming a high-strength aluminum alloy large diameter ratio pipe fitting with a rigid-flexible composite in multiple steps, which belongs to the field of metal forming and manufacturing technology. It comprises: determining the initial conical tube size according to the diameter reduction and expansion strain of the part and making the conical tube by coil welding of the plate blank, then placing the conical tube into a rigid-flexible composite mold for diameter reduction in two steps, and the flexible mold provides uniform support as it deforms, and obtaining a one-step diameter reduction part and a preformed part in sequence; then placing the preformed part in a preheated hot air expansion mold for heat preservation and solution treatment, pressurizing the closed tube cavity to form it into a mold, quenching and aging treatment after mold opening, and finally machining to remove the excess to obtain a high-strength aluminum alloy large diameter ratio pipe fitting. The present invention achieves the technical effect of uniformly supporting the stress field of the deformation zone in the multi-step rigid-flexible composite diameter reduction by the flexible mold to prevent wrinkling, combining solution treatment to improve the plasticity and elongation of the material, and quenching and aging treatment after expansion to precipitate the strengthening phase, thereby achieving the formed part without wrinkling, uniform wall thickness, and significantly improved strength and fatigue properties.

Provided is a method for molding a curled section capable of sufficiently maintaining rigidity and strength even when the curled section is reduced in size such as a thin wall or a reduced opening diameter. The diameter-reducing process is performed such that the angle between the inclined wall section (5) and the central axis (L0) of the threaded cylindrical section is within the range of 20-30 degrees (inclusive). Processing in which the tip edge section (10) side of the curved portion is rolled inward in the radial direction and brought into contact with the outer surface of the inclined wall section (5) is performed in such a manner that the tip edge section (10) falls into the curled section (1) with a dimension measured in the radial direction between the outermost diameter section (9) of the curled section (1) and the location at which the tip edge section (10) is brought into contact with the inclined wall section (5) In the range of 40% to 60% of the curl width (W), which is half of the difference between the outer diameter and the inner diameter, the contact angle ([theta] 10) of the tip edge section (10) with respect to the inclined wall section (5) falls within the range of + / -20 degrees centered on 90 degrees.

The peeling container of the present invention has: an outer layer formed of a first resin material; and a bag-shaped inner layer provided on the inner peripheral side of the outer layer, formed of a second resin material different from the first resin material, and holes for introducing air between the outer layer and the inner layer are provided in the outer layer. The peeling container includes: a neck having an opening communicating with the inside of the inner layer; a shoulder continuous from the neck and extending radially; a bottomed cylindrical body portion; and a reduced diameter portion connecting the shoulder and the body portion. The diameter of the outer peripheral edge of the shoulder is 40 mm or more and 55 mm or less, the axial length from the outer peripheral edge of the shoulder to the bottom of the reduced diameter portion where the diameter reduction is the largest in the reduced diameter portion is 12 mm or more and 25 mm or less, and the ratio of the diameter of the bottom of the reduced diameter portion to the diameter of the outer peripheral edge of the shoulder is 0.80 or more and 0.93 or less.

The present invention relates to a method for manufacturing an axle shaft of an automobile and an axle shaft manufactured by such method, and is characterized in that it is manufactured using tubes rather than round bars, and two tubes of different materials are combined and then integrated using extrusion to create the required external shape. The gist of the method is characterized by preparing a large-diameter material (1) and a small-diameter material (1') having a small outer diameter of different materials, inserting the small-diameter material (1') into the interior of the large-diameter material (1), and simultaneously performing an extrusion process one or more times while the small-diameter material (1') is inserted into the interior of the large-diameter material (1) so that the small-diameter material (1') is in close contact with the inner surface of the large-diameter material (1) and becomes an integral, thereby reducing the diameter, and by contracting the other side in the same way as the above process to make it an integral, and forming a diameter reduction part (3) and a spline part (4) to form a spline (2) at both ends, and forming a spline (2) through rolling or cutting on the spline part (4) and processing a ring groove (5).

The present application relates to the field of pipe manufacturing, and relates to a variable diameter pipe processing method, an oil and gas hose joint and a manufacturing method thereof, comprising gradient heating of a round pipe, so that the material yield strength of a pipe section to be reduced in diameter of the round pipe is distributed in a gradient along the axial direction of the round pipe, and the gradient direction of the material yield strength is opposite to the diameter reduction direction; the round pipe after gradient heating is sent into a diameter reduction die, the diameter of the round pipe is reduced by the diameter reduction die; the wall thickness change rate of the diameter reduced pipe section is monitored, and the material flow rate is obtained according to a pre-stored wall thickness change rate-material flow rate mapping table; the output pressure of a press is adjusted according to the material flow rate, so that the deformation rate of the diameter reduced pipe section in the diameter reduction die matches the material flow rate. The variable diameter pipe processing method, the oil and gas hose joint and the manufacturing method thereof accurately control the diameter reduction deformation, and improve the concentricity precision of the diameter reduced pipe section and the assembly coaxial consistency of the oil and gas hose joint.