敬礼
发表于 2025-3-23 10:09:13
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Provenance
发表于 2025-3-23 17:25:07
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不可侵犯
发表于 2025-3-23 18:10:43
Principles of Forging Presses,e largest ingot and its material characteristics at forging temperature. Usually, the overall dimensions and the weight of the ingot are indicated by its cross-section (see table 1). The ingot cross-section must be determined by the largest forging to be made by the press where, depending on the req
bypass
发表于 2025-3-24 02:16:26
Pressure Fluid Installations for Forging Presses,g the actual working stroke and the press plunger area ., which accrue the pressure fluid consumption . = . · . of the press, equalling the required pump delivery, if leak losses are neglected. The compressibility of the fluid and the vessel- and column elongations do not affect the amount of fluid
清楚
发表于 2025-3-24 06:12:26
Controls for Forging Presses,trol slide valves, their drive, and the equipment for the proper successive valve movements. The control gear determines the working stroke of the press by the opening and closing of the poppet or slide valves which control the feed and return of the cylinder’s fluid. It consists of the main control
Emmenagogue
发表于 2025-3-24 07:43:43
Economy and Comparison of the Various Kinds of Drive for Forging Presses,l pressure without utilizing the expansion energy. Particularly prodigal is the steam operation for planishing, when the controls are reversed for constant pressure (p. 179) in order to attain more strokes per minute. In this case there is no difference between idle and working strokes of same size,
嫌恶
发表于 2025-3-24 11:36:27
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CHASM
发表于 2025-3-24 15:14:44
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hemophilia
发表于 2025-3-24 21:33:53
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Eeg332
发表于 2025-3-25 02:51:55
Auxiliary Machines for Forging Press Installations,Auxiliary machines for forging press installations are: cranes, electrically activated turn-over and rotating devices, grippers, manipulators, and auxiliary tools.