Guide Rail Research Articles

Residual Stress Distributions in Elevator Guide Rail Straightening

Residual Stress Distributions in Elevator Guide Rail Straightening

The Detection and Analysis of Straightness Errors on Pillar and Guide Rail of Alien Stone Turning-Milling Compound Machining Center

The alien stone turning-milling compound machining center is a new generation gap multifunctional compound machining center. It is used to process rotating part of alien stone products and three-dimensional sculpture products. The pillar and guiding rail are the key parts of the machining center. The straightness error of the pillar and guide rail seriously impacts the linear motion precision of beam parts. Comparison the straightness of guiding rail with pillar or without pillar, it shows that the results meet the standard of GB/T16462-1996. So it ensures the accuracy of the linear motion precision of beam parts. It lays a solid foundation for achieving the design function and machining precision.

Research on the Multi-Step Straightening for the Elevator Guide Rail

The straightening of the elevator guide rail was analyzed using the load-deflection pressure straightening model. To the elevator guide rail of the same type, the straightening stroke is determined by the deflection straightened and the distance of supporting points. A formula of straightening the T127-B guide rail was proposed through FEM and regression analysis. The variation of the guide rail bending formation in the contiguous steps of the multi-step straightening process was studied and the relationship of these steps was derived. After the straightening stroke of the first step is calculated, the straightening strokes of the steps afterwards will be obtained by using the relationship and the bending formation. A simulation of straightening process taking the T127-B guide rail with a certain initial deflection as example was carried with the straightening strokes and the positions of the supporting points calculated by Matlab and the result met the requirement.

Design of Guide Rail in a Multi-Functional Open-Air Hydraulic Drill

As one of the main parts of a multi-functional open-air hydraulic drill, a guide rail is the benchmark of the power head movement. From the design experience, this paper discussed the performance requirements of the guide rail in a multi-functional open-air hydraulic drill, and studied its structural features, applications and force analysis. It has practical application value.

Study on the manufacturing process of precision linear guide rail through shape rolling and shape drawing

Guide rails are one of the most important components in terms of equipment because the quality of the linear rail in-fluences on the precision linear motion. For long rails used in the guide rail, high dimensional accuracy as well as a cross-sectional shape is required. As a production method of guide rail, drawing process is mainly used. But, the shape rolling process is open used for the pre-process of the other metal forming process such as forging, extrusion, and shape drawing. The shape rolling process is one of the most effective processes which can make long products with constant irregular cross-sectional shape. Therefore, the tool shape is a very important process variable to obtain the required final product. The objective of this paper is the design of roll shape of the rolling process to produce the initial material with irregular cross sectional shape for shape drawing. Also, the die shape of the drawing process is determined to satisfy the dimensional accuracy of the final product. In this study, FE-analysis and artificial neural network (ANN) were applied to achieve the objective. Further, shape rolling and shape drawing experiments were performed to verify the result of FE-analysis. From results, it was possible to design the roll shape of shape rolling process effectively.

High Speed and High Accuracy Machining of Long Flexible Parts with Combined Face Milling Cutters

This paper describes an innovative method to machine the guide rails for elevators in high efficiency and high accuracy. Guide rails are usually machined on a planer. However, the machining time is long because of the useless return motion of the table and low cutting speeds. In order to decrease the machining time, face milling with combined cutters was applied to the machining of guide faces. The trial face milling of guide rails indicated the reduction of the width of guide rails at the tool exit and deterioration of the perpendicularity of guide faces. Thus, in this research, the machining mechanism affecting the accuracy of the machined surfaces was studied. The analytical and experimental results revealed that cutter path deviation from the center of a guide rail affects the width reduction at the exit part of the guide rail, whilst the clamping stiffness of the guide rail has a much greater influence on the perpendicularity of the guide face than the cutter path deviation. It was also found that change in the number of cutting edges engaged in machining simultaneously caused wavy machined surface with a long wave length. Finally, determined based on the above findings were the critical tool path deviation and critical clamping stiffness, which permitted the efficient machining of the guide rails at a high cutting speed of 267m/min and a high feed rate of more than 1000mm/min, decreasing machining time by a factor of six.

Wavelet Denoising of the Horizontal Vibration Signal for Identification of the Guide Rail Irregularity in Elevator

Wavelet denoising method was introduced to improve the validity of identifying the guide rail irregularity in elevator. The horizontal acceleration signal measured from a test elevator was processed by wavelet denoising. Then the denoised signal was decomposed up to four levels using Daubechies 4 mother wavelet to identify the guide rail irregularity. The results indicate that the impulses due to the guide rail irregularity are prominent in wavelet decompositions. And the causes resulting in those characteristics of the vibration signal can be well revealed. So discrete wavelet transform (DWT) can be used as an effective tool for denoising the horizontal vibration signal of elevator and diagnosing faults in the guide rail.

I04 対向衝突における飛翔体軟回収用ガイドレールの製作(I0 機械力学(宇宙・産業応用))

I04 対向衝突における飛翔体軟回収用ガイドレールの製作(I0 機械力学(宇宙・産業応用))

アクティブ操舵による新交通車両の乗り心地向上と軌道への負担軽減(J24-3 交通機械のダイナミクス,J24 交通機械のダイナミクス)

アクティブ操舵による新交通車両の乗り心地向上と軌道への負担軽減(J24-3 交通機械のダイナミクス,J24 交通機械のダイナミクス)