6results about How to "Reduce processing deformation" patented technology

The invention discloses a machining and assembling method for a rigid magnet yoke of a rotor of a large pumped storage generator set, and relates to the technical field of generators. According to the machining method, by standardizing the machining technology, machining steps, using tools and the like of the T-shaped super-long key groove in the outer circle of the rigid magnet yoke, the universal method capable of meeting machining of the T-shaped super-long key groove in the outer circle of the rigid magnet yoke of various sizes and specifications is provided, and the machining method capable of meeting the requirement for series manufacturing of machining tools is provided. By means of nine coherent steps and application of three types of machining tools, it is guaranteed that the roundness of the inner circle and the outer circle and the position of an inner key groove are within the technical requirement of a drawing when the magnet yoke section is a single piece, and a reference is provided for follow-up overall stacking. In the overall machining period after the nine magnet yoke sections are stacked, the machining quality of the T-shaped super-long key groove in the outer circle of the magnet yoke is guaranteed to completely meet the technical requirements through the measures of standardizing machining and detecting steps, optimizing a machining tool, standardizing machining parameters of the tool and the like. And the overall size consistency and the quality stability of the T-shaped super-long key groove on the outer circle of the rigid magnet yoke of a hydro-generator and a generator motor of a pumped storage unit are greatly improved. The method has the characteristics of high efficiency, popularization and the like.

The invention discloses a high-titanium S700MC high-strength steel plate, which relates to the technical field of steel production and comprises the following chemical components in percentage by mass: 0.050 to 0.080 percent of C, 0.10 to 0.30 percent of Si, 1.70 to 2.00 percent of Mn, not more than 0.018 percent of P, not more than 0.003 percent of S, 0.070 to 0.090 percent of Nb, 0.010 to 0.04 percent of V, 0.09 to 0.15 percent of Ti, not more than 0.020 percent of Ni, not more than 0.30 percent of Cr, 0.10 to 0.20 percent of Mo, not more than 0.30 percent of Cu, 0.030 to 0.070 percent of Al, 0.0008 to 0.0030 percent of Ca, not more than 0.0008 percent of B, not more than 0.0040 percent of N and the balance of Fe and inevitable impurities. The mechanical properties of the prepared steel plate meet the conditions that the longitudinal tensile yield strength is larger than or equal to 700 MPa, the tensile strength ranges from 750 MPa to 950 MPa, the ductility is larger than or equal to 15%, and the longitudinal impact energy at the temperature of minus 40 DEG C is larger than or equal to 40 J.

This invention discloses a gas turbine cylinder block machining positioning device, belonging to the field of machining clamping technology. The gas turbine cylinder block includes an outer cylinder, an inner cylinder, a star-shaped support, and a support ring. Multiple height-adjustable support mechanisms include support seats and movable supports. The movable supports are provided with normal positioning parts and tangential positioning parts. The top protection mechanism includes a guide plate, a first variable diameter plate, multiple sector plates, and multiple second positioning parts that can move synchronously radially. The guide plate is provided with multiple first straight grooves and second straight grooves. The first variable diameter plate is provided with multiple first arc-shaped grooves and connected to a second drive assembly. The multiple sector plates are stacked, and the sector plates are provided with first pins that cooperate with the first straight grooves and first arc-shaped grooves and second pins that cooperate with the second straight grooves. This invention uses height-adjustable support mechanisms to position the outer cylinder, resist shear force and axial force, and ensure support rigidity. It also cooperates with the top protection mechanism to make the axes of the support ring, outer cylinder, and inner cylinder collinear.

The utility model relates to an inner hole finish turning tool for a conical thin-wall shell, which comprises a sleeve, sleeve sealing plates and a workpiece, the sleeve is sleeved outside the workpiece, an annular cavity is arranged between the sleeve and the workpiece, two ends of the annular cavity are sealed by the sleeve sealing plates, the annular cavity is uniformly divided into a plurality of fan-shaped filling cavities by a plurality of nylon strips, and the fan-shaped filling cavities are communicated with the sleeve sealing plates. The fan-shaped filling cavity is filled with filler, the nylon strip is bonded to the outer surface of the workpiece, and the outer surface of the nylon strip is attached to the inner wall of the sleeve. The annular cavity between the workpiece and the sleeve is evenly divided into a plurality of fan-shaped filling cavities through the nylon strips, the functions of consolidating the shell taper and preventing a sand layer from moving in the machining process are achieved, machining deformation is reduced, the machining quality is improved, the cutter vibration phenomenon is avoided, and the surface quality of an inner hole is improved.

The invention discloses a machining method for a forging half-and-half axial flow casing. The machining method comprises the following steps that S1, a cylindrical forging blank is obtained through forging; s2, rough machining is conducted on the forge piece blank; s3, the outer contour of the large end and the outer contour of the small end are sequentially machined to the design size through eccentric milling, the allowance of 1-2 mm is reserved on the boss end face of the forged piece blank, and the allowance of 1-2 mm is reserved on the longitudinal binding face of the forged piece blank; s4, the forging blank is subjected to heat treatment; s5, a runner and an inner groove of the forging blank are subjected to rough machining, the allowance of 1-2 mm is reserved for the runner, and the allowance of 1-2 mm is reserved for the inner groove; s6, the forging blank is linearly cut into a left half casing and a right half casing; s7, the longitudinal binding face is machined to the designed size, then the end face of the boss, the flow channel and the inner groove are machined to the designed size, and the forged half-and-half axial flow case is obtained; compared with the prior art, deformation is small, quality is stable and controllable, the design pattern requirement can be met, the machining period is short, and the new machine development period is greatly shortened.

This invention proposes a method for obtaining optimal machining parameters for cantilever parts based on numerical simulation. The method uses Advantedge FEM software to solve for cutting force and cutting temperature under different machining parameters. The cutting force is then input as a boundary condition into finite element software such as ANSYS Workbench / ABAQUS. Through static strength analysis, modal analysis, and harmonic response analysis, the machining deformation, natural frequencies, and vibration amplitude of the cantilever part under different machining parameters are simulated. By combining the two numerical simulation software programs, accurate prediction of cutting force, cutting temperature, cutting deformation, and part vibration frequency during machining is achieved. Based on the prediction results, the optimal cutting parameters and clamping methods for machining large cantilever parts can be determined, providing guidance for actual production and effectively improving machining quality and efficiency while reducing production costs.