Flexible, Robot Guided Single-Pass Honing

2016 ◽  
Author(s):  
Eckart Uhlmann ◽  
Sascha Zimmermann
Keyword(s):  
Surface Quality ◽  
Tribological Properties ◽  
Industrial Robot ◽  
Dimensional Accuracy ◽  
Experimental Results ◽  
Flexible Robot ◽  
Single Pass ◽  
Machining Center

In manufacturing, honing is used to meet high demands on shape and dimensional accuracy, surface quality, as well as tribological properties. In particular, honing of workpieces with bore holes in various positions and angles represents a challenge. With the help of a 6-axis industrial robot, a W-shaped compressor body was machined and experimental results were compared with results produced by a machining center.

Flexibles robotergeführtes Dornhonen*/Flexible, robot guided single-pass honing - Flexible honing of geometrically complex workpieces in small and medium lot size production

2015 ◽  
Vol 105 (06) ◽  
pp. 360-365
Author(s):  
E. Uhlmann ◽  
S. Zimmermann
Keyword(s):  
Surface Quality ◽  
Tribological Properties ◽  
Industrial Robot ◽  
Dimensional Accuracy ◽  
Lot Size ◽  
Flexible Robot ◽  
Single Pass ◽  
Machining Center ◽  
Geometrically Complex ◽  
Flexible Honing

Das Fertigungsverfahren Honen kommt zur Anwendung, wenn an Bauteile hohe Anforderungen hinsichtlich Form- und Maßgenauigkeit, Oberflächenqualität sowie tribologische Eigenschaften gestellt werden. Insbesondere das Honen von Bauteilen mit Bohrungen in verschiedenen Positionen und Winkellagen stellt eine Herausforderung dar. Mithilfe eines 6-Achs-Industrieroboters wurde ein Verdichtergehäuse in W-Bauform bearbeitet. Anschließend wurden die Arbeitsergebnisse mit konventionell gefertigten Bauteilen verglichen.   In manufacturing, honing is used to meet high demands on shape and dimensional accuracy, surface quality, as well as tribological properties. In particular, the honing of workpieces with bore holes in various positions and angles represents a challenge. With the help of a six-axis industrial robot, a W-shaped compressor housing was machined and working results were compared with results produced on a machining center.

On Technologies of Electrochemical Finishing with Pulsed Current

2012 ◽  
Vol 522 ◽  
pp. 41-46
Author(s):  
Adayi Xieeryazidan ◽  
Muhetar Wumerhali ◽  
Gui Bing Pang
Keyword(s):  
Surface Quality ◽  
Process Parameters ◽  
Dimensional Accuracy ◽  
Experimental Results ◽  
Main Process ◽  
Pulsed Current ◽  
Electrode Gap ◽  
Electric Parameter ◽  
Machining Quality ◽  
Electrochemical Finishing

Electrochemical finishing with pulsed current (ECFP) is introduced in this paper. The main process parameters, such as electric parameter and inter-electrode gap, etc., were investigated. The results show that the ECFP is an effective finishing method for improving the machining quality as the result of the machining mechanism. The related experimental results show that the obtained surface quality and dimensional accuracy are improved significantly as the result of the application of the pulsed current. Moreover, machining quality is increased with shorter pulses.

The Research on Turning Operation of Varied Diameter Slender Shaft

2011 ◽  
Vol 130-134 ◽  
pp. 2621-2624
Author(s):  
Lin Yang ◽  
Peng Wang ◽  
Zhong Wei Ren ◽  
Fang Fang ◽  
Yan Li
Keyword(s):  
Surface Quality ◽  
Machine Tools ◽  
Production Efficiency ◽  
Dimensional Accuracy ◽  
Experimental Results ◽  
Turning Operation ◽  
Vibration Theory ◽  
Wide Range ◽  
Engineering Significance

By analysing the processing characteristics of varied diameter slender shaft parts, and according to the basic vibration theory of slender shaft, a production machine is designed,moreover, a solution with flexible hydraulic follower rest and elastic tailstock is adopted creatively. Experimental results show that this machine tools can effectively improve radial dimensional accuracy,surface quality and production efficiency of the varied diameter slender shaft parts and it has a wide range of engineering significance.

Research Status of Subsequent Machining of Laser Cladding Layers

2020 ◽  
Vol 15 ◽  
Author(s):  
Lei Li ◽  
Yujun Cai ◽  
Guohe Li ◽  
Meng Liu
Keyword(s):  
Tool Wear ◽  
Surface Quality ◽  
Laser Cladding ◽  
Wear Surface ◽  
Chip Formation ◽  
Cutting Temperature ◽  
Dimensional Accuracy ◽  
Cutting Parameters ◽  
Cladding Layer ◽  
Cladding Layers

Background: As an important method of remanufacturing, laser cladding can be used to obtain the parts with specific shapes by stacking materials layer by layer. The formation mechanism of laser cladding determines the “Staircase effect”, which makes the surface quality can hardly meet the dimensional accuracy of the parts. Therefore, the subsequent machining must be performed to improve the dimensional accuracy and surface quality of cladding parts. Methods: In this paper, chip formation, cutting force, cutting temperature, tool wear, surface quality, and optimization of cutting parameters in the subsequent cutting of laser cladding layer are analyzed. Scholars have expounded and studied these five aspects but the cutting mechanism of laser cladding need further research. Results: The characteristics of cladding layer are similar to that of difficult to machine materials, and the change of parameters has a significant impact on the cutting performance. Conclusion: The research status of subsequent machining of cladding layers is summarized, mainly from the aspects of chip formation, cutting force, cutting temperature, tool wear, surface quality, and cutting parameters optimization. Besides, the existing problems and further developments of subsequent machining of cladding layers are pointed out. The efforts are helpful to promote the development and application of laser cladding remanufacturing technology.

scholarly journals Grinding of Arc-Sprayed Tungsten Carbide Coatings on Machining Centers - Process Configuration and Simulation

2010 ◽  
Vol 438 ◽  
pp. 115-122 ◽  
Author(s):  
Dirk Biermann ◽  
T. Mohn ◽  
H. Blum ◽  
H. Kleemann
Keyword(s):  
Tungsten Carbide ◽  
Hybrid Simulation ◽  
Measurement Methods ◽  
Simulation System ◽  
Experimental Results ◽  
Basic Process ◽  
Machining Center ◽  
Process Configuration ◽  
Carbide Coatings ◽  
Conventional Machining

This paper describes the special demands placed on the grinding of arc-sprayed WC-Fe coatings on a conventional machining center. Basic process configuration, experimental results, measurement methods and an approach for a hybrid simulation system are presented.

scholarly journals Research on the Influencing Factors of "Scale Veins" of Single Point Incremental Forming Workpieces Surface

2015 ◽  
Vol 9 (1) ◽  
pp. 1025-1032
Author(s):  
Shi Pengtao ◽  
Li Yan ◽  
Yang Mingshun ◽  
Yao Zimeng
Keyword(s):  
Surface Quality ◽  
Incremental Forming ◽  
Single Point ◽  
Spindle Speed ◽  
Experimental Results ◽  
Feed Speed ◽  
Single Point Incremental Forming ◽  
Machining Parameters ◽  
The Mathematical Model

To furthermore optimize the machining parameters and improve the surface quality of the workpieces manufactured by single point incremental forming method, the formation mechanism of the sacle veins on the metal incremental froming workpieces was studied through experiment method. The influence principle of the spindle speed, the feed speed and the material of tip of tools on the length of scale veins was obtained through analyzing the experimental results and building the mathematical model among the length of scale veins were feed speed and spindle speed through measuring the roughness of surfaces and observing the appearance of the forming workpieces. The experimental results showed that, the spindle speed, the feed speed and the material of tool tips have a significant effect on the scale veins formation on the surface of forming workpieces. Therefore, an appropriate group of spindle speed and feed speed can reduce the effect of scale veins on the roughness of single point incremental forming workpieces and furthermore improve the surface quality of forming workpieces.

scholarly journals Effects of Sintering Behaviors on Dimensional Accuracy, Surface Quality, and Mechanical Properties of Stereolithography-printed 3Y-ZrO2 Ceramics

2021 ◽  
Author(s):  
Cheng Zhang ◽  
Zhaoliang Jiang ◽  
Li Zhao ◽  
Weiwei Guo ◽  
Chengpeng Zhang
Keyword(s):  
Mechanical Properties ◽  
Dental Implants ◽  
Surface Quality ◽  
Dimensional Accuracy ◽  
Scanning Speed ◽  
Sintering Process ◽  
X Ray Diffraction ◽  
Air Atmosphere ◽  
Length Width ◽  
Technical Guide

Abstract Sintering process is essential to acquire the final components by stereolithography (SLA), which is a promising additive manufacturing technology for the fabrication of complex, custom-designed dental implants. 3Y-ZrO2 ceramics at different sintering behaviors in air atmosphere were successfully obtained in this study. Firstly, the curing properties of homemade pastes were studied, and the penetration depth and critical exposure of the pastes were calculated as 17.2 μm and 4.80 mJ/cm2, respectively. The green ceramic parts were performed at 154 mW laser power and 6000 mm/s scanning speed. Then, the dimensional accuracy, surface quality, and mechanical properties of 3Y-ZrO2 ceramics were investigated. The shrinkages of length, width, and height were 26%~27 %, 30%~31 %, and 27%~33 % in sintered ceramics, respectively. The Ra values of XOY, YOZ, and XOZ surfaces showed an anisotropic feature, and they were smallest as 0.52 μm, 2.40 μm, and 2.46 μm, respectively. Meanwhile, the mechanical properties presented a similar trend that they grew first and then dropped at various sintering behaviors. The optimal parameters were 1500 ℃, 60 min, and 4 ℃/min, and the maximum relative density of 96.18 %, Vickers hardness of 12.45 GPa, and fracture toughness of 6.35 MPa·m1/2 were achieved. Finally, the X-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS) analysis demonstrated that no change was observed in crystal transformation and phase composition, and the organic was completely removed in sintered ceramics. This research is expected to provide a technical guide for the fabrication of ceramics for dental implants using SLA technique.

Influence of Manufacturing Process on the Fatigue Strength of Gears

2014 ◽  
Vol 1018 ◽  
pp. 269-276
Author(s):  
Andrea Reiß ◽  
Ulf Engel
Keyword(s):  
Fatigue Strength ◽  
Surface Quality ◽  
Fatigue Behavior ◽  
High Surface ◽  
Research Work ◽  
Dimensional Accuracy ◽  
Cold Forging ◽  
Hardness Distribution ◽  
Forming Process ◽  
High Surface Quality

With cold forging processes it is possible to produce parts characterized by high strength, high dimensional accuracy and high surface quality. In order to optimize the forming process and to be able to use the advantages of cold forging specifically and combined, it is necessary to find correlations between manufacturing parameters on the one side, strength and other properties like hardness distribution and surface quality of the component on the other side. The research work covered in this paper focuses on the correlation of the components properties influenced by its manufacturing history and their fatigue strength. The used component is a gear produced by a lateral cold forging process. For the investigations an experimental setup has been designed. The aim for the design of the setup is to reproduce the real contact condition for the contact of two gears. To obtain different component properties the production process of the gear was varied by producing the parts by a milling operation. First of all, the components’ properties, for example hardness distribution, remaining residual stresses, orientation of fibers and surface quality, were determined. The components’ fatigue behavior was determined using a high frequency pulsator and evaluated in terms of finite life fatigue strength and fatigue endurance limit. These examinations were used to produce Woehler curves for the differently manufactured components with a certain statistical data analysis method.

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