Structural Optimization of Drilling Bed for Deep Hole Drilling Machine

2014 ◽  
Vol 599-601 ◽  
pp. 473-477 ◽  
Author(s):  
Yin Sai Guo ◽  
Yi Zhang ◽  
Ming Ke Cheng
Keyword(s):  
Structural Parameters ◽  
Dynamic Stiffness ◽  
Plate Thickness ◽  
Hole Drilling ◽  
Drilling Machine ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Object A ◽  
Design Variables ◽  
The Cost

Taking the drilling bed of Z8016 deep hole drilling machine as the research object, a modal analysis of drilling bed structure is performed by ANSYS software. Assuming that the low-order natural frequencies basically remain unchanged, the structure of the drilling bed is analyzed and modified so as to decrease its weight. The bed structure is selected based on ANSYS, that is to say, the structural parameters of the drilling bed are optimized in the condition of fundamental frequency constraints, which takes wall thickness, ribbed plate thickness and the diameter of ribbed plate holes of the drilling bed as design variables. Compared with the original one, the optimal drilling bed has better dynamic stiffness, reduces material consumption, lowers the cost of the drilling bed and achieves the optimal goal.

Simulation Study on Deep Hole Drilling Machine Hydraulic System Based on System Schematic Diagram

2010 ◽  
Vol 136 ◽  
pp. 144-147
Author(s):  
He Cao ◽  
Wei Hua Wu
Keyword(s):  
Hydraulic System ◽  
Simulation Method ◽  
Simulation Software ◽  
Hole Drilling ◽  
Schematic Diagram ◽  
Drilling Machine ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Modeling Process ◽  
Hydraulic System Design

Aiming at the issues of cumbersome modeling process and complicated programs, the hydraulic system simulation software automation studio is introduced, which is based on system schematic diagram. Taking the hydraulic system of deep hole drilling machine for example, by using automation studio, the motor’s input pressure and flow are simulated and studied, and this system is debugged on bosch rexroth experiment table, the parameter test results are basically the same with their simulation results. This simulation method can accurately simulate the system’s working state, simplify the process of modeling and parameter adjustment, and provide a good way for hydraulic system design and dynamic characteristic study.

Development of Deep Hole Drilling Technology for Tube Sheet of Steam Generator

2014 ◽  
Author(s):  
Shinichiro Ueda ◽  
Takuya Yagishita ◽  
Jun Maeno ◽  
Masanari Okuda
Keyword(s):  
Steam Generator ◽  
Control Technique ◽  
Hole Drilling ◽  
Drilling Machine ◽  
Tube Sheet ◽  
Deep Hole ◽  
Steam Generators ◽  
Deep Hole Drilling ◽  
Drilling Operation ◽  
Drilling Technology

Advanced PWR nuclear power plant has very-large steam generators of which tube-sheet is diameter 5000mm / thickness 500 mm / weight 100 ton or larger. Drilling of very thick tube sheet needs deep-hole drilling technique with strict dimensional tolerance control. In addition, the tube sheet has 10,000 or more tube holes, which means that stable drilling operation is mandatory for productivity control. Upon such background, steam generator tube sheet drilling operation needs precise dimensional control technique with highly efficient productivity. In this study, authors did (1) feasibility-study and development of deep hole drilling machine with the Boring and Trepanning Association (BTA) method, (2) cutting parameter evaluation such as feed rate and cutting velocity, (3) tube hole measurement system development, and (4) drill exchange program development with monitoring drilling machine motor loads and setting alarm level for the loads. Based on techniques developed by this study, IHI has achieved high-accuracy and stable deep-hole drilling technology for very-thick tube sheets applicable to the very-large steam generators.

The Method of Transforming Ordinary Machine Tools to Ultrasonic Vibration Deep Hole Drilling Machine Tools

2014 ◽  
Vol 541-542 ◽  
pp. 538-543
Author(s):  
Xue Hong Shen ◽  
Hong Bing Zhao
Keyword(s):  
Ultrasonic Vibration ◽  
Machine Tools ◽  
New Technology ◽  
Hole Drilling ◽  
Deep Hole ◽  
Vibration Direction ◽  
Deep Hole Drilling ◽  
Machining Center ◽  
Vertical Milling Machine ◽  
The Cost

Ultrasonic vibration deep hole drilling is a kind of new technology for combining ultrasonic vibration with deep hole drilling. This paper mainly describes the transformation of lathe, vertical milling machine and vertical machining center by bits vibration direction or adding some auxiliary institutions, then make it have the ability of drilling deep hole. With these transformation, machine tools have some advantages, such as the efficiency and precision are improved, machining quality is stable, chip removal is easy, the cost is low. Besides, it also provides a good way for making full use of existing equipments.

Deep Hole Drilling Technique (DHD)

2019 ◽  
Vol 88 (6) ◽  
pp. 485-488
Author(s):  
Shinji KAWAI ◽  
Takuya NAGAI ◽  
Shigetaka OKANO
Keyword(s):  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Drilling Technique

scholarly journals Temperature monitoring in the subsurface during single lip deep hole drilling

2020 ◽  
Vol 87 (12) ◽  
pp. 757-767
Author(s):  
Robert Wegert ◽  
Vinzenz Guski ◽  
Hans-Christian Möhring ◽  
Siegfried Schmauder
Keyword(s):  
Cutting Parameters ◽  
Drill Hole ◽  
Machining Process ◽  
Hole Drilling ◽  
Drilling Process ◽  
Deep Hole ◽  
Machining Processes ◽  
Deep Hole Drilling ◽  
Feed Force ◽  
Cutting Zone

AbstractThe surface quality and the subsurface properties such as hardness, residual stresses and grain size of a drill hole are dependent on the cutting parameters of the single lip deep hole drilling process and therefore on the thermomechanical as-is state in the cutting zone and in the contact zone between the guide pads and the drill hole surface. In this contribution, the main objectives are the in-process measurement of the thermal as-is state in the subsurface of a drilling hole by means of thermocouples as well as the feed force and drilling torque evaluation. FE simulation results to verify the investigations and to predict the thermomechanical conditions in the cutting zone are presented as well. The work is part of an interdisciplinary research project in the framework of the priority program “Surface Conditioning in Machining Processes” (SPP 2086) of the German Research Foundation (DFG).This contribution provides an overview of the effects of cutting parameters, cooling lubrication and including wear on the thermal conditions in the subsurface and mechanical loads during this machining process. At first, a test set up for the in-process temperature measurement will be presented with the execution as well as the analysis of the resulting temperature, feed force and drilling torque during drilling a 42CrMo4 steel. Furthermore, the results of process simulations and the validation of this applied FE approach with measured quantities are presented.

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