共查询到20条相似文献，搜索用时 15 毫秒
1.
Xiao Dichen Liang Xuehang Zhang Jisheng 《保鲜与加工》1990,(5):7-14
A method which uses computer to model the form cutting of helical is presented and quantitatively analysed the errors of the ptofile shape and its position from the deviations of manufacturing and installing of the forming cutter and helical movement of the machine tools are quantitatively analysed, the optimum technique is used to revise the adjustable parameters for compensating the error. It is valuable in engineering application. 相似文献
2.
Basing on the theory of engagement, a design has been done for a new type of counter-intermeshing twin-screw kneader. Profile of the screw includes arcs and its envelope lines, and the profile is smooth and continuous without cuspidal points. Milling cutter blade profiles also have been calculated and corrected for manufacturing the helical parts designed and getting the clearance acquired. There may be interference between the cutter and the workpiece, so interference check must be done to insure the milling cutter and screw will not be interfered. 相似文献
3.
Modeler and simulation modules in Ideas software are used to build the finite element models on involute gear and double involute gear with accurate tooth shape, and with the same design parameters and under the same loads, finite element contact analysis has been done. At last, the contact stress and bending stress on the two types gear transmission at the different meshing positions are solved out, and comparative analysis and study have been done. At the same time, that the ladder-shape tooth on the double involute gear how to influence contact stress and bending stress is emphatically analysed. All above offer the theoretical foundation that bring the double involute gear with ladder-shape tooth into the industry. 相似文献
4.
The tracing method is applied to generate the contour graph, it is difficult to find the start point of the interior closed contour beam. This paper presents a general scanning beam method which can be applied to generate color contour graph for elements with arbitrary shape by the object-oriented programming. We give visualization of the elements of triangle the element with 3 Points, triangle element with 6 Points, quadrilateral element with 4 Points, quadrilateral element with 8 Points, quadrilateral Element with 9 Points and the example by the MFC of Visual C++ R6. 相似文献
5.
From the mathematical model of the double involute gear teeth surface at any corner position,we establish the model of the double involute gear with high precision and parameter in Pro/E,analyze and calculate the influence of natural frequency by the parameter of the double involute gear,analyze the frequency respond elementary.The conclusions reflect the gear's performance of dynamics,and provide the librate characteristic data for the design of double involute gear. 相似文献
6.
Numerical control last making machine is a machine that is used to process shoe last. A new principle of numerical control machining shoe last is put forward aiming at the deficiency of current carving last system. On the basis of the principle, the algorithm of cutter machining position during numerical controlled carving last is analyzed in detail. The complex problem of the calculation of cutter machining positiion is resolved by applying spherical milling cutter that is often used in machining free_curve surface today and taking account of practical situation of the shoe last_making machine. At the same time, the calculation of cutter machining position is realized by program using Visual C++6.0. As a result, the calculation time of cutter machining position is reduced greatly and the efficiency of design is improved. Moreover, the process of carving last is agile and precision of carving last is ensured. 相似文献
7.
There exists muchinterference in machining internal spiral groove with big lift angle and small size, whichis a difficult problem. The design and calculation of tool section is analyzed in this paper while differentcutters are utilized to machine the groove when the tool axis is parallel or skew to that of the work piece. The approximating method of using circular-arc cutter is put forward, which is proved by the calculation and analysis to be a feasible method within range of the permissible error. The digital simulation of machining internal spiral groove which is finished by different methods, such as simulation of tool path, error analysis, verification of the cutter design and so on, has been done through typical software such as the Program files function of I-DEAS and the Manufacturing Module of UG. 相似文献
8.
A mathematical model for accurate relief grinding of gear hob cutters along radial directions is presented based on the analysis of grinding geometry. Both the design and manufacturing models of gear hob cutters are carefully derived and presented. By employing the plane envelope theory, the reference contour of the grinding wheel is determined in order to attain the design tool profile precisely. The tooth profile error model after regrinding is also given to confirm the grinding parameters. The model provides accurate solutions for both the tool profile and the sectional contour of the grinding wheel. It is simple and straightforward and can be used to produce high precision hob cutters systematically. Two numerical examples are presented to illustrate the effectiveness of the proposed method. The model computing results indicate that the proposed method is practical, precise and reliable. The method provides valuable reference for the design and machining of hob cutters. 相似文献
9.
Xu Hongbin Zhang Guanghui Masana Kato 《保鲜与加工》1999,(1):116-120
The stiffness of the tooth with different profile parameters,meshing stiffness and the coefficients of loading distribution allowing for no error are calculated and analyzed on double involute gear with ladder shape teeth for the first time,and the results are made comparison with traditional involute gear;The stiffness of the double involute gear and the meshing stiffness are both increased,and the coefficients of loading distribution are basically unchanged.The energy integration method is also put forth to solve stiffness approximately by linear approximating the tooth profile curve. 相似文献
10.
The results of Finite Element Method are a lang of data A general method is presented which can be applied to generate color contour image for elements with arbitrary shape by the object oriented programming. The authors give Visualization of the Elements of triangle Element with 3 Points, triangle Element with 6 Points, quadrilateral Element with 4 Points, quadrilateral Element with 8 Points, quadrilateral Element with 9 Points and the example by the MFC of Visual C++ R6. 相似文献
11.
Aiming at the problem of machining quenched internal helical gears, a method and its equipment are discussed and designed, which is used for machining quenched internal helical gears by EDM. Its characteristic and principle are proposed. The modifying design of the electrode gear and the calculating method of its modification coefficients is presented. Analyzing for the error of the machining equipment is done. The results show that this problem can be solved by EDM, the electrode gear is the modification gear of machined gear and the machining accuracy can be improved by controlling errors. 相似文献
12.
ZhaoXuejun LiPingyuan 《保鲜与加工》1989,(6):81-87
By using the least pth min-max method, we find the best approximation of involute ptofile by peach-shaped ring section. The error of approximation is less than that of [ 1 ] and [2]. Thus we provide a new direction for dressing of a wheel for involute gear forming-grinding. In order to simplify calculation, we define the error function according to implicit equation of curve and as a result its rationalization is proved. 相似文献
13.
Zhao Xuejun Li pingyuan 《保鲜与加工》1990,(3):100-106
In this paper,we study the approximation of involute profile by moor-shaped ring section. By using the minimax method, we find parameter of the best approximation moon-shaped ring section of invelute piofile. The error of approximation is 35% - 70% that of [1] and [2]. Thus the approximation precision of dressing a wheel for involute gear forming-grinding by approximating method has been greatly improved. In order to simplify calculation, the error function is defined according to the implicit equation of curve and its rationalization is proved. 相似文献
14.
In order to research face-gear drives, a face-gear drive with spur involute pinion is considered. The genera, tion of a face gear is based on application of a conventional shaping machine and an involute shaper. The functions of theoretic shaping surface and processing surface about the face gear are deduced. Computer programs are developed for simulation of these surfaces. In shaping time, mutual position of two surfaces, theoretic shaping surface and processing surface, is analyzed by simulation. In the end, the feasibility of the process method is concluded. 相似文献
15.
A new design method for the individual hip joint endoprostheses is proposed. By picking up the contour lines from the femur's CT images and making them closed and smoothed, a solid model of the femur is reconstructed using the contour lines by CAD software. An individual anatomical hip joint endoprosthesis is designed with the inner contour curves of the medulla cavity in CAD software. Utilizing the APDL(ANSYS Parametric Design Language) and the CT value per pixel in the CT image for developing a program through which every element of the bone can get its own material property. The finite element model's anisotropy and inhomogeneity of bone material are realized, then the endoprosthesis and the femur-stem contact finite element model can be built in ANSYS. Based on this, calculation on the contact model can be processed. It is feasible to checkout the rationality of the design by comparing the stress distribution in the femur with the situation before replacement. And the results reveal that the method is more reasonable and reliable. 相似文献
16.
To analyze and design multivariable control system by modern frequency domain method, there should be a transformation of an arbitrary polynominal matrix into Smith's canonical form. This paper discusses the treating method and technique in programming and gives a N-S flow diagram of program to transform an arbitrary polynominal matrix into Smith's canonical form. Two transformed and applied examples show, that the program is correct, simple, useful and has good suitability. It is applicable to frequency-domain analysis and design of multivariable system. 相似文献
17.
Based on an analysis of the current die design situation, the numerical simulation software Dynaform was applied to die development. In a compacting spring bracket project, the finite element method and shape forming technology were used to simulate and validate the pressing and forming processes. Top to bottom technology of Pro/Engineering next was adopted to design the die. The result shows such die design methods and technologies can help designers develop dies quickly and accurately and improve productivity. 相似文献
18.
In this paper,the variation pattern of the contact point on cutter tooth and gear tooth is analyzed during gear shaving process. According to the shaving force measured by dynamometer, the deformation of cutter tooth and gear tooth at the contact point is calculated by appying the three dimension finite element method. The deformation curve of cutter tooth and gear tooth are obtained by analying deformation in shaving domain. It is the basis of studying relation between shaved amount and deformation. 相似文献
19.
On the basis of applying three dimensional discrete formative technology to describing last surface, working principle of numerical controlled last carving machine is briefly introduced. Then the algorithm of ascertaining milling cutter machining position during the machining process is analyzed in detail. We establish a three dimensional reference frame with spatial analytic geometry and obtain the spatial equation of milling cutter rotary surface. According to last machining character, we put forward a machining algorithm named Minimal Distance Method and is used to calculate the milling cutter machining position. Finally, the glabrous degree of last made by us has reached the conventional demand. 相似文献
20.
Liang Xichang 《保鲜与加工》1989,(1):1-7
The paper describes a new theory and methods for designing hyperbola, degenerate circles, involute and roulette curves which have been applied in grinding convex involute gears, cutting special profiles on a gear shaper, grinding the race-way of ball thrust bearings, form grinding and grinding cyclo-cycloidal gears with an abrasive belt. All these applications have been used in industruy with considerable benefits.
The curves are produced by different combinations of straight line and circle motions, Given the curve parameters of the workpieces to be machined, the best approximate curve can be obtained from a computer program designed for this purpose. 相似文献