scholarly journals Support on Demand

2001 ◽  
Vol 123 (08) ◽  
pp. 60-62
Keyword(s):  
Stainless Steel ◽  
Coordinate Measuring Machine ◽  
Spinal Deformities ◽  
First Line ◽  
Spinal Implant ◽  
Left Behind ◽  
On Demand ◽  
Probe System ◽  
Measuring Machine ◽  
Touch Probe

OMC Precision Products, a maker of spinal implant, first line of attack for smoothness is machining to minimize cusps or scallops left behind by machine tool cutters. In finishing passes, the cusps are diminished by minimizing stepovers, the distance the tool moves into the new path. OMC focuses on making implants for correcting spinal deformities. OMC has three lines of implants, all machined from stainless steel or titanium. It makes plates and screws for spines that are degenerating or have undergone trauma; hooks and rods for deformities such as scoliosis; and cages to replace damaged vertebrae. First-article inspections are done on a Primus coordinate measuring machine from Mycrona Inc. of Plymouth, Michigan. The unit is equipped with a touch probe system from Renishaw Inc. of Schaumburg, Illinois. OMC also produces 2 alternatives to plates, a spine straightening system based on titanium or stainless-steel rods several inches long. The rods are locked in place with diverse types of bone screws or spinal hooks.

Evaluation of True Position Using Coordinate Measuring Machine

2014 ◽  
Vol 555 ◽  
pp. 511-517
Author(s):  
Roman Budiský ◽  
Marian Králik ◽  
Ján Kost
Keyword(s):  
Measurement Uncertainty ◽  
Coordinate System ◽  
Experimental Evaluation ◽  
Coordinate Measuring Machine ◽  
Coordinate Measuring Machines ◽  
Probe System ◽  
Geometric Deviations ◽  
True Position ◽  
Measuring Machine ◽  
Touch Probe

The article makes a contribution to the ever-important topic of evaluating geometric deviations of tolerated forms related to the datum system using coordinate measuring machines with a touch probe system. The datum system consists of the coordinate system and the coordinates planes. An integral part of the article is the quantification of the true position tolerated form related to the datum system and experimental evaluation of the deviation with calculation of measurement uncertainty, according to STN EN ISO 15530-3.

Development of a Sensitive Probe for Coordinate Measuring Machines

2005 ◽  
Vol 295-296 ◽  
pp. 325-330 ◽  
Author(s):  
M. Watanabe ◽  
Ryoshu Furutani
Keyword(s):  
Laser Diode ◽  
Precision Measurement ◽  
Coordinate Measuring Machine ◽  
Coordinate Measuring Machines ◽  
Contact Type ◽  
Photo Diode ◽  
Probe System ◽  
Measuring Machine ◽  
Industrial Needs

Requirement for precision measurement becomes extremely advanced as industrial needs advances. CMM (Coordinate Measuring Machine) is one of the most adequate measuring machines to meet the requirement. As the precision of CMM becomes higher, it is important to improve the sensitivity of probe. We developed a contact type probe which consisted of a QPD (quadratic photo diode), a ball lens, and a laser diode to detect the displacement of stylus. The probe system has a resolution of 31nm.

On-Machine Inspecting

2005 ◽  
Vol 127 (04) ◽  
pp. 30-33 ◽  
Author(s):  
Paul Sharke
Keyword(s):  
Stainless Steel ◽  
Coordinate Measuring Machine ◽  
Machine Shop ◽  
Colorado Springs ◽  
Complex Curves ◽  
Measuring Machine ◽  
One Machine

This article discusses about on-machine inspecting. This type of inspecting has helped to turn around business for at least one machine shop, Tech Machine in Colorado Springs, Colo., where it is made a big dent in scrap rates. Tech Machine manufactures tight-tolerance stainless steel and titanium medical parts that have many complex curves and very smooth finishes. On-machine inspecting has helped to turn around business for at least one machine shop, Tech Machine in Colorado Springs, Colo., where it is made a big dent in scrap rates. Tech Machine manufactures tight-tolerance stainless steel and titanium medical parts that have many complex curves and very smooth finishes. A part that can be measured at the machine and corrected there is one that avoids moving between the numerically controlled machine and the coordinate measuring machine. Small cuts can be made and then checked immediately.

scholarly journals Characterization of machining quality attributes based on spindle probe, coordinate measuring machine, and surface roughness data

2014 ◽  
Vol 1 (2) ◽  
pp. 128-139 ◽  
Author(s):  
Tzu-Liang Bill Tseng ◽  
Yongjin James Kwon
Keyword(s):  
Surface Roughness ◽  
Coordinate Measuring Machine ◽  
Dimensional Accuracy ◽  
Quality Characteristics ◽  
Machining Parameters ◽  
Production Environment ◽  
Significant Interaction Effect ◽  
Machining Quality ◽  
Measuring Machine ◽  
Touch Probe

Abstract This study investigates the effects of machining parameters as they relate to the quality characteristics of machined features. Two most important quality characteristics are set as the dimensional accuracy and the surface roughness. Before any newly acquired machine tool is put to use for production, it is important to test the machine in a systematic way to find out how different parameter settings affect machining quality. The empirical verification was made by conducting a Design of Experiment (DOE) with 3 levels and 3 factors on a state-of-the-art Cincinnati Hawk Arrow 750 Vertical Machining Center (VMC). Data analysis revealed that the significant factor was the Hardness of the material and the significant interaction effect was the Hardness + Feed for dimensional accuracy, while the significant factor was Speed for surface roughness. Since the equally important thing is the capability of the instruments from which the quality characteristics are being measured, a comparison was made between the VMC touch probe readings and the measurements from a Mitutoyo coordinate measuring machine (CMM) on bore diameters. A machine mounted touch probe has gained a wide acceptance in recent years, as it is more suitable for the modern manufacturing environment. The data vindicated that the VMC touch probe has the capability that is suitable for the production environment. The test results can be incorporated in the process plan to help maintain the machining quality in the subsequent runs.

scholarly journals Dimensional Accuracy of Stone Casts Obtained with Multiple Pours into the Same Mold

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Valdimar da Silva Valente ◽  
Artêmio Luiz Zanetti ◽  
Pedro Paulo Feltrin ◽  
Ricardo Tatsuo Inoue ◽  
Carmem Dolores Vilarinho Soares de Moura ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Coordinate Measuring Machine ◽  
Dimensional Accuracy ◽  
Wait Time ◽  
Type Iv ◽  
Impression Technique ◽  
Fixed Prosthesis ◽  
Measuring Machine ◽  
Master Model ◽  
Made In

Aim. The aim of the present study was to compare the dimensional accuracy of stone casts obtained with vinyl polysiloxane molds through the double-impression technique with three pours into the same mold. Methods. A stainless steel master model was constructed simulating a three-unit fixed prosthesis. Twelve impressions were taken of this master model with addition silicone, using the double-impression technique. Three pours of type IV gypsum were then made into each mold, thus producing 36 casts. The pours were made 1 hour, 6 hours and 24 hours after the impression procedure. Next, intra- and interabutment measurements were made in a coordinate measuring machine. Results. Comparative analysis of the dimensional accuracy of stone casts resulting from multiple pours was not statistically significant in pours first and second (P>0.05). These values, however, were statistically significant at third pour in the height in abutment 1 and upper distance interabutment. Conclusion. The wait time (1 hour, and 6 hours) observed before pouring the stone into the same molds did not cause significant dimensional accuracy of the casts.

Development and characterization of a high-sensitivity fiber Bragg grating-based vibrating nano-probe for 3D measurement

Sensor Review ◽  
2019 ◽  
Vol 39 (2) ◽  
pp. 199-207
Author(s):  
Fangfang Liu ◽  
Jingfan Wang ◽  
Lijuan Chen ◽  
Ruijun Li ◽  
Haojie Xia ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Three Dimensional ◽  
Coordinate Measuring Machine ◽  
Content Type ◽  
Measurement Resolution ◽  
Probe System ◽  
Dimensional Measurements ◽  
Measuring Machine ◽  
Fbg Sensors ◽  
Micro Structures

Purpose There is an increasing demand for higher-accuracy dimensional measurements of nano- and micro-structures. Recently, the authors presented a fiber Bragg grating (FBG) sensor-based dynamic nano-coordinate-measuring machine (CMM) probe for true three-dimensional coordinate measurement, in which a specific mechanical structure with several FBG sensors was developed to provide the probe with sensitivity to loading in all directions. Design/methodology/approach The study presents a three-dimensional sensing and demodulation system based on an improved matched filter design and the time division multiplexing technique that helps solve the problem of multiplex FBG-signals conflicts. In addition, the application of the dynamic mode of the probe system effectively solves the problem presented by the surface interaction forces. Findings Consequently, this FBG-based vibrating probe system has increased sensitivity to strain, while maintaining smaller contact force. The experiments for testing probe performance show that the prototype yielded a measurement resolution of 13 nm, a repeatability of 50 nm and a vertical measurement force of less than1.5 mN. Research limitations/implications The force tests in the horizontal directions are difficult to conduct because both the probe and the dynamometer are only adaptable to vertical use. Practical implications Development of the FBG-based dynamic nano-coordinate-measuring machine probe will achieve a new and inexpensive method for higher-accuracy dimensional measurements of nano- and micro-structures, such as micro-electromechanical systems, micro-fluidic chips, inkjet and diesel engine injector nozzles that are in overall dimensions within the micrometer scale. Originality/value The study presents a three-dimensional sensing and demodulation system for the vibrating nano-coordinate-measuring machine probe based on FBG sensors. The prototype yielded a measurement resolution of 13 nm, a repeatability of 50 nm and a vertical measurement force of less than1.5 mN.

Sign in / Sign up

Export Citation Format

Share Document