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Hydraulic cylinders

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860081
EISBN: 978-1-62708-338-6
... the current technology was derived. The discussion covers quality control requirements for composite fabrication technology and cleanliness standards in the workplace. It describes technology developed for specific components, including satellites struts, aircraft hydraulic cylinders, drill pipe, drive shafts...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400203
EISBN: 978-1-62708-316-4
..., to the initial position. In single-action presses, the die cavity is attached to the slide. The punch sits stationary on the press bed. The blank holder is supported by the die cushion system, which provides the BHF. Most commonly, the BHF is generated by one or more pneumatic or hydraulic cylinders...
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
.... hydraulic drive systems hydraulic press HYDRAULIC PRESSES generate the forming force and necessary ram motion by hydraulic cylinders. The pressurized fluid medium drives the piston in the cylinder, and the motion is controlled using a set of valves. A typical hydraulic circuit consists of a reservoir...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700225
EISBN: 978-1-62708-279-2
... of stampings. Active binders, sometimes called programmable binders or pressure cushions, are designed to provide a variable pressure trajectory in the binder throughout the press stroke. These systems consist of hydraulic cylinders and proportional valves connected to an open-loop programmable controller...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270175
EISBN: 978-1-62708-301-0
... Abstract Several hydraulic pumps that failed in service on a particular type of aircraft were received for analysis. Hydraulic testing was not an option, so the pumps were disassembled and their plungers and cylinders were cleaned and examined. Based on their observations, investigators...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500179
EISBN: 978-1-62708-317-1
... prestrain, ε 0 ¯ , given in Eq 9.1 , accounts for the consumed formability during tubemaking. A schematic of hydraulic bulge tooling and the major components is shown in Fig. 9.8 . The tooling system consists of two hydraulic cylinders at the upper and lower die. Each hydraulic cylinder...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410029
EISBN: 978-1-62708-280-8
... against the cover die; it is activated by a hydraulic cylinder and locked into position by a toggle mechanism. Fig. 4.4 Cold chamber die casting machine schematic Figure 4.5 shows the sequence of the casting process. The two halves of the die are sprayed with a water-based lubricant...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400145
EISBN: 978-1-62708-316-4
..., such as deep drawing, a blank holder force is required in addition to the punch force. In a single-action press, it is possible to equip the dies with springs, air or hydraulic cylinders, or high-pressure nitrogen cylinders to apply the blank holder force. The other two options are (a) to use a die cushion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040115
EISBN: 978-1-62708-300-3
... and of turbine and compressor blades The operation of hydraulic presses is relatively simple and is based on the motion of a hydraulic piston guided in a cylinder [ Geleji 1967 ], [ Mueller 1969 ], [ Peters 1969 ]. Hydraulic presses are essentially load-restricted machines; i.e., their capability...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500157
EISBN: 978-1-62708-317-1
... in hydraulic presses that provide high ram forces and have a counterpressure pot. Modern hydroforming (sheet or tube) presses use a long-stroke, high-speed cylinder to move the ram rapidly to reduce the cycle time. After the ram reaches the end of the stroke, two laterally-movable cylinders are activated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040141
EISBN: 978-1-62708-300-3
..., and worm gear drive powered by one or two hydraulic motors. Each adjustment nut rests, through a piston, on an oil cushion of a hydraulic cylinder. During operation, the forging pressure generates in this oil cushion a pressure proportional (about 20%) to the forging pressure. The pressure in this oil...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400129
EISBN: 978-1-62708-316-4
... material. The stiffness of a press can be measured under static and dynamic loading conditions. Measuring static stiffness has been standardized by DIN 55 189, as shown in Fig. 9.9 . To measure the vertical stiffness ( C ), a load ( L ) is applied by means of a hydraulic cylinder at the center...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500019
EISBN: 978-1-62708-317-1
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410215
EISBN: 978-1-62708-280-8
... cores. The side cores slide in and out by hydraulic cylinders. The top core is lowered or lifted by the top cylinder of the machine. The face core is bolted to the machine platten. Fig. 8.1 Wheel tooling schematic The bottom part of the mold that houses the sprue is called the face core...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410103
EISBN: 978-1-62708-280-8
... lubrication . This process is usually automated, with very little or no operator intervention. Air blowing . Air is blown on the die face to distribute the die lubricant evenly and also blow off any remnants of flash stuck in the die cavity. Die closing . The hydraulic closing cylinder moves...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.9781627083164
EISBN: 978-1-62708-316-4
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740163
EISBN: 978-1-62708-308-9
... pulling and pressing of the metal. Machines used for these operations have capacities to 8900 kN (1000 tonf). Stretch draw forming is done in three types of machines. In one type, the form block is mounted on a hydraulic cylinder and is pushed into the blank, which is held in tension by a pair...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040059
EISBN: 978-1-62708-300-3
... and heat transfer modeling of a Ti-64 cylinder upset test in a hydraulic press. The starting temperature of the Ti-64 workpiece was 1750 °F (955 °C), and the starting tool steel die temperature was 300 °F (150 °C). At the end of the cylinder upsetting, there was quite a temperature gradient inside both...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980323
EISBN: 978-1-62708-342-3
.... , “Efficient Use of Liquid Nitrogen for Aluminum Extrusion Die Cooling and Inerting,” Fourth Inernational Aluminum Extrusion Technology Seminar ( Chicago, IL ), 1988 [Mül 59]: Müller E. , Hydraulische Pressen und Druckflüssigkeitsanlagen (Hydraulic Presses and Accumulation Systems) , 3rd ed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500249
EISBN: 978-1-62708-317-1
... is the high precision of the produced parts. Typical parts produced by spinning include ( Fig. 12.18 ): Braking and hydraulic cylinders Pulleys Barrels Exhaust silencers Wheel rims Cooking pots Gas containers Parts for jet engines, rockets, and missiles Lamp housings...