62results about How to "High shape precision" patented technology

The invention discloses a pipe shape control method for rolling a seamless steel pipe by using a seven-frame tandem mill, which aims to provide a control method for processing data by using on-line detection pipe shape information and controlling rolling parameters in real time by integrating thickness errors, ellipticity errors and straightness errors which influence pipe shapes so as to ensure the accuracy of the pipe shapes. The method comprises the following steps of: 1) presetting the rolling parameters; 2) calculating rolling reduction and rolling force according to actually-measured wall thickness, ellipticity and straightness, namely making the rolling reduction, the wall thickness errors, the ellipticity errors and the straightness errors form a matrix, simplifying the matrix to be a corresponding relationship between the rolling reduction and a single parameter by an elimination method, calculating the rolling reduction caused by the wall thickness errors, the rolling reduction caused by the ellipticity errors and the rolling reduction caused by the straightness errors respectively, and calculating the rolling force by using the sum of the calculated rolling reduction caused by the wall thickness errors, the ellipticity errors and the straightness errors; and 3) modifying the rolling force and roller gap numerical values in real time in the rolling process.

The invention discloses a robot arm component which comprises a connecting piece and a supporting member which are separately formed. The connecting piece rotates and is installed to the robot. The supporting member and the connecting piece are fixedly connected. The connecting piece is a revolving body, and the interior of the revolving body is provided with a first cavity penetrating two ends and extending along a straight line. The interior of the supporting member is provided with a second cavity which is communicated with the first cavity of the connecting piece. The invention also provides a manufacturing method of the robot arm component and a robot with the arm component. The robot arm component has the advantages of simple structure and the like, and is convenient to cast.

The invention provides a working table for FDM printing equipment. The working table comprises an adsorption platform. The first face of the adsorption platform is coated with a clad layer of a first material, and the second face opposite to the first face and a heating slab are in thermal coupling, wherein the clad layer has no viscosity in a normal temperature state and is bonded to a printing mold in a heating state. According to the purpose, the working table for the FDM printing equipment can grab the mold firmly in the mold printing process, and can be disassembled conveniently.

The invention relates to a forming die for cylindrical composite component with flanging and a preparation method. The die comprises a core barrel, an insert, an end cover, a flange shaft, a pressureleveling plate and a demolding tool. The demolding tool comprises a demolding frame and a top plate. By means of the technical scheme of the forming die for the cylindrical composite component with the flanging and the preparation method, the problem that the difficulty of forming a variable-section cylindrical ceramic-based composite material thin-wall component with flanging is large can be solved. Sufficient forming pressure can be provided for prepreg in the forming process, so that each profile surface of a component is uniformly stressed, and the defects of the component are avoided. Through the block insert design and the demolding tool, it is ensured that the component can be safely and smoothly removed from a mold after formed, and the forming quality and the forming efficiency ofthe component are improved.

The invention discloses a square rectangular steel pipe with corner thickening and cold-heat composite molding and a preparation method thereof. The outer corner radius of the square rectangular steelpipe satisfies the following conditions: when t is less than or equal to 6mm, R is greater than 0 and less than 2.0t; when t is greater than 6 and less than or equal to 10mm, R is greater than 0 andless than 2.5t; and when t is greater than 10mm, R is greater than 0 and less than 3.0t, wherein t is the wall thickness of the straight pipe section of the square rectangular steel pipe, R is the outer corner radius of the four corners of the square rectangular steel pipe, and the corner wall thickness of the square rectangular steel pipe is between 1.0t and 1.8t. According to the square rectangular steel pipe with corner thickening and cold-heat composite molding and the preparation method thereof, the hot forming technology is introduced into a traditional roll-bending forming process, thatis, the local induction heating technology. High temperatures can reduce the forming force of materials and improve the forming performance of the materials; and meanwhile, the phenomena of the residual stress caused by work hardening and cracking which is possibly caused can be eliminated, a corner profile of the square rectangular steel pipe subjected to cold-heat composite molding is dense, the radii of an inner corner and an outer corner are small, the angle of the corner is close to 90 degrees, and the corner is thickened.

The invention relates to a performed composite propeller blade of a ship and a manufacturing method of the performed composite propeller blade. Compared with a metal propeller, the preformed composite propeller blade has the advantages that the weight is low, corrosion resistance is good, the hydrodynamic performance is superior, cavitation can be delayed, cavitation corrosion is reduced, the acoustic characteristic is excellent, noise of the propeller is lowered, and the stealth performance of the ship can be easily improved. Fiber covers serve as a primary bearing mechanism, and the fiber covers are designed to be of identical thickness and cover the whole blade. By means of the performed composite propeller blade of the ship and the manufacturing method of the performed composite propeller blade, quasi two-dimensionalization of complex three-dimensional weaving is effectively achieved. The problems of delamination and stripping of guide edges and following edges of an original blade are effectively solved, the weaving difficulty is reduced, and cost is reduced; and the dead load of the propeller blade can be greatly reduced, and the appearance precision of the propeller blade is improved.

The present invention relates to a fixing method, fixing apparatus, and image formation device. The fixing belt 408 racks between the fixing roller 402 and heating roller 406. The pressure roller 412 pushes the fixing roller to form a second fixing-process area. The supporting roller 416 contacts inside the fixing belt 408 and winds the fixing belt around a surface of the pressure roller 412 to form a first fixing-process area. The pressure applying member applies a pressure to the heat roller in a direction opposite to an ejection of the recording sheet to adjust a fixing pressure of the pressure applying member to set a optimum fixing pressure not to generate a crinkle. The pressure roller has a hard structure not easier to deform than the fixing roller and improve the reproducibility and stability of linear velocity in fixing.