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feedback process control

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700225
EISBN: 978-1-62708-279-2
... and consistency. One strategy for controlling sheet metal forming processes is to use feedback process control. In this strategy, a measurable process variable (e.g., punch force) is controlled by following a predetermined (e.g., punch force-displacement) reference trajectory through manipulation...
Image
Published: 01 March 2002
/min)  Second weld 13½ in./min (343 mm/min) Filler metal 0.032 in. (0.813 mm) diam Waspaloy Filler-metal feed Constant speed, with feedback control Filler-metal speed 20 in./min (508 mm/min) Shielding gas (argon):  At torch 30–35 ft 3 /h (14–17 L/min)  Backing gas 8–10 ft 3 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260233
EISBN: 978-1-62708-336-2
... and analyzed, and if any correlation can be obtained, feedback is given to the process control system. The following are sampling processes used in statistical analysis ( Ref 11 ): Single-sampling plan Double-sampling plan Sequential-sampling plan Grouped sequential-sampling plan MIL-STD...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410253
EISBN: 978-1-62708-280-8
... control plan Phase 4. Product Launch Analysis of variance, monitoring, and control Process capability study Machining feedback and corrections Ramp up to run multi-stations in the cell Run at rate confirmation Phase 5. Continuous Improvement Things gone right and things...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050025
EISBN: 978-1-62708-311-9
... Abstract This chapter discusses the basic components in an induction heat treating system. It describes the design and operating characteristics of power supplies, load-matching transformers, tuning capacitors, power regulators, controllers, process monitors, and diagnostic systems. It also...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220077
EISBN: 978-1-62708-341-6
... Saver Systems, Inc. Timers Control of induction heating systems can be on an open-loop or a closed-loop basis. Closed-loop systems make use of a control signal (most often temperature) in a feedback circuit to regulate the operation of the induction power supply. The control signal is compared...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220047
EISBN: 978-1-62708-341-6
... off the SCR’s in the inverter circuit. A feedback circuit from the resonant tank, together with power- and voltage-control signals, is fed to a local oscillator whose output signal then controls the inverter firing rate. The system then operates at a frequency along the straight portion of the tank’s...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220253
EISBN: 978-1-62708-341-6
... Abstract Because of its speed and ease of control, induction heating can be readily automated and integrated with other processing steps such as forming, quenching, and joining. Completely automated heating/handling/control systems have been developed and are offered by induction equipment...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460107
EISBN: 978-1-62708-285-3
..., for the first time, mass-flow-controlled gas flow rate, pressure or flow control of process gas, feedback-controlled gun temperature, the possibility of operating with nitrogen-helium gas mixtures, touch panel parameter input, data logging, and many other advanced features, which translated into the production...
Book Chapter

By Eren Billur
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400181
EISBN: 978-1-62708-316-4
... ( Ref 12.1 , 12.17 ). Servo-actuated valves have a feedback loop and a controller that drives a torque motor to actuate the valve. These allow a very accurate control of the spool. A DCV (e.g., Fig. 12.6 ) can be servo actuated, where the spool can be moved incrementally and act as a restrictor...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260029
EISBN: 978-1-62708-336-2
... to control the extrusion process. The method is characterized by a variable with programmable extrusion speed and real-time process adaptable to the variable conditions of the heat transfer providing the required exit temperature. This method could be useful in the design and manufacture of control systems...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.9781627082808
EISBN: 978-1-62708-280-8
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720063
EISBN: 978-1-62708-305-8
... as an in-process gaging tool for controlling the process and correcting trends that could lead to the production of defective parts. Consequently, manufacturers in a variety of industries have investigated this important technology, regardless of the products being manufactured. The automotive and electronics...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290261
EISBN: 978-1-62708-319-5
...-temperature sintering. Binder chemistry impacts the binder-removal process. binder jet. An additive manufacturing technique where computer-controlled binder jets bond particles into a green body, layering powder with binder deposited on each layer. A three-dimensional object forms the layer stack. Bingham ow...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.9781627083195
EISBN: 978-1-62708-319-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270003
EISBN: 978-1-62708-301-0
..., after the system has suffered wear and other degradation processes. At this stage, the system can no longer function reliably, safely, and economically. All quality control efforts aim at reducing the failure rate in the first zone and extending the life in the second zone. Fig. 1.1 Failure rate...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220143
EISBN: 978-1-62708-341-6
... Abstract This chapter discusses the selection, use, and integration of methods to control process variables in induction heating, including control of workpiece and processing temperature and materials handling systems. The discussion of temperature control includes a review of proportional...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410029
EISBN: 978-1-62708-280-8
.... Limitations The limitations of the evaporative foam casting method include: Each casting needs a pattern, and to pay for the pattern costs, the process depends heavily on saving in core costs. The patterns are weak and are liable to distort under compaction. The pattern bead density controls...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500301
EISBN: 978-1-62708-317-1
..., monitoring these variables and controlling their effects to produce high-quality products is critical and essential. The purpose of using sensor technologies is to improve the sheet metal forming process by increasing tool and machine uptimes, reducing setup and downtimes, and reducing scrap. For example...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220281
EISBN: 978-1-62708-341-6
..., and maintenance costs are negligible. Automatic line-temperature feedback control adjusts the heating-equipment power level to maintain a constant curing temperature regardless of line speed. Scrap due to improper curing is virtually eliminated. By-products of the induction curing process are limited to vapors...