摘要:
This invention relates to a method to selectively mitigate intergranular stress corrosion cracking (IGSCC) by rapid quench melting through the use of a pulsed laser. Such methods of the type, generally, mitigate reactor pipe cracking by rapidly melting the sensitized material to redissolve chromium carbide and then rapidly cooling the sensitized material such that corrosion cracking can be avoided.
摘要:
An improved laser-assisted machining process has special application to difficult-to-machine materials such as the titanium alloys and high temperature superalloys. A layer of material to be removed by a cutting tool is made weaker by drilling a series of holes using a pulse laser beam ahead of the cutting process so that the tool removes the rest of the weaker material with relative ease. There is a decrease of cutting forces, breakage of the chip to a manageable size, and reduced tool wear.
摘要:
A novel apparatus capable of measuring distribution of a shot stream is disclosed. More particularly, the apparatus comprises an elongated measurement window positioned within a partition plate. Said elongated measurement window being partitioned into smaller sub-windows, each of which is capable of collecting shot from an area of a shot stream to be measured. This measurement may then be used to determine the peening time needed to fully cover each element of a part's surface with impact dents during a shot peening operation.
摘要:
This invention relates to a method for directly measuring the amount of surface cold work due to a surface treatment operation. Such methods of this type, generally, allow the surface cold work created by a shot peening operation to be directly measured without having to destruct the substrate.
摘要:
In a single point machining operation, such as metal cutting on a lathe, the precession angle of lobes on a rotating workpiece is determined by measuring the frequency and changing phase of the cutting vibrations, and the stability of the machining operation is monitored by comparing the lobe precession angle to a predetermined range of values within which regenerative chatter may occur. Stability of the machining operation is maintained and productivity is optimized by controlling the crossfeed to maintain the lobe precession angle close to but outside of the predetermined range of values.
摘要:
A rotating displacement sensor located on the tool holder under the cutting tip works equally well in many directions so it can perform in-process and tool condition compensation of contoured parts. The air nozzle is rotated by a turret-mounted motor and has a rectangular displacement sensing orifice whose plane is kept parallel to machined surfaces. An automatic control continuously adjusts the nozzle rotation to minimize the air gage output voltage and measured distance from the nozzle to the workpiece. The device may be used strictly as an inspection head.
摘要:
A new and improved safety locking device for PVC ball valves and the like comprising, a housing positionable over a PVC ball valve of the type having a on/off handle rotatable about a vertical axis, the handle including a horizontal section positionable in the direction of flow of fluid within coupled pipes when in an open orientation and positionable perpendicular to the direction of flow when in a closed orientation; the housing being formed of a pair of similarly shaped mating halves, each half having a front face and a rear face with each face having a semicircular opening which, when the housing halves are coupled for operation and use, define a circular opening with a central axis coextensive with the axis of the ball valve and pipes coupled with respect thereto, each housing half also having a top face and a bottom face and an exterior side face coupling the front and rear faces but leaving open the interior face with the semicircular openings; the front and rear faces of the housing halves being sufficient in size to form a chamber for a ball valve; a hinge pivotally coupling the housing halves; a supplemental plate with an aperture on each housing half, the apertures of the plates being aligned for the receipt of a lock; a rectangular cut out formed in at least one of the front and rear faces of each housing half as an extension of the circular openings, the cut out being positioned and sized to receive the handle of the ball valve when in the open orientation but to preclude movement of the handle from one orientation to the other when the housing halves are coupled and locked.
摘要:
This invention relates to a sensor for monitoring the operation of a suction-type shot peening machine. Such structures of this type, generally, measure the vacuum in the gun mixing chamber of the suction-type shot peening machine. Changes in this sensor will be indicative of either gun surging or changes in shot delivery rate or velocity. Its output will, therefore, provide diagnostic information on the performance of the process.
摘要:
This invention relates to methods for measuring surface treatment coverage, and more particularly, to such methods for measuring shot peening coverage. Such methods generally employ an automated computer analysis of the peened surface coverage by analyzing surface line traces to determine when a particular surface has been surface hardened enough.
摘要:
This invention relates to an apparatus and method for measuring the particle number rate and the particle velocity distribution of a sprayed stream such as, a shot peening system. In particular, a double spinning disk apparatus modified with a stationary aperture and a scanning aperture is used to scan the spayed stream and observe the stream's local properties.