Research on Processing Technology and Cutting Parameter of the Spiral Surface of Screw Rotor

2011 ◽  
Vol 314-316 ◽  
pp. 543-546
Author(s):  
Xing Wei Sun ◽  
Guang Lv ◽  
Ke Wang
Keyword(s):  
Cutting Parameters ◽  
Element Model ◽  
Milling Process ◽  
Screw Compressor ◽  
Processing Quality ◽  
Excellent Performance ◽  
Single Screw ◽  
Screw Rotor ◽  
Spiral Surface ◽  
The Finite Element Model

The key components of the single screw compressor are rotor screw and two star-wheels which are symmetrical arrangement. The rotor screw and two star-wheels have composed a special spatial meshing pair. The high meshed precision is the guarantee of its excellent performance. In this paper, we will study the milling technology of screw milling cutter to the rotor screw, and establish the finite element model of the cutter, and analyze the cutter’s stress situation during the milling process, make the cutting parameters of the screw optimization, In this paper, we will also study the influence of the Milling depth and cutting width to tool in displacement and stress, in order to provide a theoretical reference of selecting of appropriate cutting parameters ,improving of processing quality and reducing wear of the tool.

Optimization Design of DVG850 Worktable System Based on ANSYS Workbench

2012 ◽  
Vol 184-185 ◽  
pp. 356-359
Author(s):  
Jiang Miao Yi ◽  
Dong Qiang Gao ◽  
Fei Zhang ◽  
Huan Lin
Keyword(s):  
Modal Analysis ◽  
Natural Frequency ◽  
High Speed ◽  
Optimization Design ◽  
Element Model ◽  
Single Screw ◽  
Machining Center ◽  
The Finite Element Model ◽  
Better Than ◽  
Ansys Workbench

The finite element model of worktable system is created and modal analysis is made with ANSYS Workbench by taking DVG850 high-speed vertical machining center worktable system for example. We make modal analysis of single-screw strength general reinforcement worktable system and get the natural frequency and the vibration mode.Then in order to improve the system's natural frequency, the scheme of dual-screw worktable system is put forward. Also natural frequency and vibration mode is got. Finally, it is proved that the performance of dual-screw worktable system is significantly better than the single-screw one. This provides a reliable reference for further study on dynamic analysis of worktable system.

A mathematical model of a cc-type single-screw compressor

2004 ◽  
Vol 218 (4) ◽  
pp. 437-448 ◽  
Author(s):  
S-C Yang
Keyword(s):  
Mathematical Model ◽  
Cutting Edge ◽  
Screw Compressor ◽  
Contact Lines ◽  
Full Size ◽  
Single Screw ◽  
The Family ◽  
Screw Rotor ◽  
Design And Manufacture ◽  
Further Development

In this paper, a method is proposed for determining a basic profile of a cc-type single-screw compressor including the gate rotor and the screw rotor. The cc-type has a cylindrical screw and two cylindrical gate rotors. Based on this method, a mathematical model of the meshing principles of a cc-type screw rotor meshed with a gate rotor, that has either straight edge teeth or conical teeth, is presented. The inverse envelope concept is used to determine the cutting-edge curve of a gate rotor. Based on this concept, the required cutter for machining a cc-type screw rotor can be obtained by the envelope of a one-parameter family. The obtained screw rotor is an envelope to the family of the gate rotor's surfaces. The obtained envelope becomes the generating surface. The inverse envelope can be used to obtain the envelope to the family of generating surfaces. Then the profile of a gate rotor cutting-edge curve can be easily obtained. The surface analysis including contact lines is shown for the design and manufacture of a screw compressor. As an example, the cc-type single-screw compressor with a compressor ratio of 11:6 was determined with the aid of the proposed mathematical model. Using rapid prototyping (RP) and manufacturing technology, a cc-type single-screw rotor with a gate rotor was designed. The RP primitives provide an actual full-size physical model that can be analysed and used for further development. Results from these mathematical models should have applications in the design of cc-type single-screw compressors.

A mathematical model of the rotor profile of the single-screw compressor

2002 ◽  
Vol 216 (3) ◽  
pp. 343-351 ◽  
Author(s):  
S-C Yang
Keyword(s):  
Mathematical Model ◽  
Parameter Family ◽  
Cutting Edge ◽  
Screw Compressor ◽  
Single Screw ◽  
Rotor Profile ◽  
The Family ◽  
Screw Rotor ◽  
The One ◽  
Screw Rotors

This paper presents a method for determining the basic profile of a single-screw compressor including a gate rotor and a screw rotor. The inverse envelope concept for determining the cutting-edge curve of the gate rotor is presented. Based on this concept, the required cutter for machining the screw rotor can be obtained by an envelope of the one-parameter family of obtained screw rotors. The obtained screw rotor is an envelope of the family of gate rotor surfaces. Let the obtained envelope of the one-parameter family of gate rotor surfaces become the generating surface. The inverse envelope can be used to obtain the envelope of the family of generating surfaces. Then, the profile of the gate rotor with the cutting-edge curve can be easily obtained. The proposed method shows that the gate rotor and the screw rotor are engaged along the contact line at every instant. This is essential to reduce the effect of leakage on compressor performance. In this paper, a mathematical model of the meshing principle of the screw rotor with the gate rotor is established. As an example, the single-screw compressor for a compressor ratio of 11:6 is determined with the aid of the proposed mathematical model. Results from these mathematical models should have applications in the design of single-screw compressors.

Deformation Analysis of Aero Thin-Walled Workpiece Under Multi-Stress Coupled Effect

2007 ◽  
Author(s):  
Dong Lu ◽  
Jianfeng Li ◽  
Yiming Rong ◽  
Jie Sun ◽  
Song Zhang ◽  
...  
Keyword(s):  
Initial Stress ◽  
Initial Conditions ◽  
Stable Condition ◽  
Coupled Model ◽  
Element Model ◽  
Milling Process ◽  
Deformation Analysis ◽  
Reaction Forces ◽  
Milling Forces ◽  
The Finite Element Model

Cutting stress coupled with clamping stress and initial stress affects the workpiece deformation. To predicate the workpiece deformation during machining, the multi-stress coupled model was developed. The finite element model of milling process is established and the milling forces were predicted. The predicated milling force, clamping force and initial stress were taken as initial conditions and were inputted into the multi-stress coupled model. Workpiece deformation during machining and reaction forces of locators were predicated. To maintain workpiece in a stable condition during machining, reaction forces of the locators when the cutting tool moving along the clamp side must be monitored.

Deformation Analysis of Thin-Walled Workpiece under Multi-Stress Coupled Effect

2010 ◽  
Vol 426-427 ◽  
pp. 284-288
Author(s):  
Dong Lu ◽  
Guo Hua Qin ◽  
Yi Ming Rong ◽  
C.M. Peng
Keyword(s):  
Initial Stress ◽  
Coupled Model ◽  
Element Model ◽  
Milling Process ◽  
Machining Process ◽  
Deformation Analysis ◽  
Milling Force ◽  
Thin Walled ◽  
And Control ◽  
The Finite Element Model

This document Cutting stress coupled with clamping stress and initial stress affects the workpiece deformation. To analyze the workpiece deformation the initial stress model is developed. The finite element model of milling process is established and the milling force and milling heat is predicted. The multi-stress coupled model is developed and the workpiece deformation during machining process and deformation after fixtures released are predicted. This study is helpful to predict and control the deformation for thin-walled workpiece.

A Finite Element Analysis for the Characteristics of Cutting Parameters in 3D Oblique Milling Process

2010 ◽  
Vol 97-101 ◽  
pp. 3010-3013
Author(s):  
Guo Hua Qin ◽  
S.Q. Xin ◽  
Dong Lu ◽  
Yi Ming Rong
Keyword(s):  
Finite Element ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Element Model ◽  
Milling Process ◽  
Machining Process ◽  
Element Analysis ◽  
Complete Procedure ◽  
Commercial Software Package ◽  
Chip Removal

In the field of aeronautical and astronautical manufacturing, milling is a basic machining process by which a surface is generated by progressive chip removal. Therefore, this paper reports a complete procedure of the finite element model for the 3D oblique milling process using the commercial software package ABAQUS. Effect of various parameters on cutting forces is mainly discussed. The model correctly exhibits the observed transition from small to large force with increasing cutting speed and cutting depth.

3D FEM Modeling of Ball End Milling of HSM H13 Die Steel with Cutter Inclination

2011 ◽  
Vol 189-193 ◽  
pp. 1551-1554 ◽  
Author(s):  
Liang De Wang ◽  
Jun Zhao ◽  
Yu Gang Jiang
Keyword(s):  
End Milling ◽  
Cutting Parameters ◽  
Element Model ◽  
Milling Process ◽  
Fem Modeling ◽  
3D Fem ◽  
Ball End Milling ◽  
3D Software ◽  
3D Fem Modeling ◽  
Deform 3D

This paper outlines the development of a 3D finite element model (FEM) for the H13 milling, Deform 3D software was used for ball end milling simulation. A milling force experiment was carried out under the same cutting conditions with the simulation. The results showed that the simulated cutting force agreed well with the experimental data. The proposed method of 3D FEM can be used to correctly simulate the HSM milling process, so as to optimize cutting parameters．

Geometric Design Investigation of Single Screw Compressor Rotor Grooves Produced by Cylindrical Milling

2009 ◽  
Vol 131 (7) ◽  
Author(s):  
Weifeng Wu ◽  
Quanke Feng ◽  
Xiaoling Yu
Keyword(s):  
Mathematical Simulation ◽  
Surface Profile ◽  
Geometric Design ◽  
Screw Compressor ◽  
Machining Efficiency ◽  
Gas Leakage ◽  
Single Screw ◽  
Compressor Rotor ◽  
Compressed Gas ◽  
Screw Rotor

Cylindrical milling of a screw rotor groove in a single screw compressor has higher machining efficiency than turning. However, the screw groove bottom produced by the flat end of the milling cutter fails to mesh hermetically with the flat tooth tip due to the oversized clearance between them. The clearance forms two leakage paths leading to a compressed gas leakage. The shape of the path is roughly the same as that of two parallel oblate divergent nozzles in an inverse orientation. A mathematical simulation is presented for the surface profile of the screw groove bottom for a single screw compressor generated using several cylindrical milling cutters. The results contribute to improving the design of the meshing pairs in the single screw compressor.

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