摘要:
An internal caisson/jacket leg cutter and method provides a frame having upper and lower end portions. The upper end portion has rigging that enables the frame to be lifted. Extensible arms are movably supported upon the frame. The arms extend and retract along generally radially extending lines. Extension of the arms enables them to contact the inside surface of a caisson/jacket leg and thus center and anchor the frame within the caisson/jacket leg interior. A cutting mechanism at the lower end portion of the frame includes one or more rotary cutters or milling devices that cut the caisson/jacket leg wall as these cutters traverse an arc shaped path, tracking the caisson/jacket leg wall.
摘要:
A groove cutting assembly comprising a cutter housing, a cutter assembly with a cutting edge, and the cutter assembly being accommodated by the cutter housing, and a drive mechanism, coupled to the cutter assembly, for indexing the cutter assembly one of radially inward and radially outward relative to the cutter housing upon rotation of the cutter assembly past an indexing member. The drive mechanism comprises a barrel assembly, engaged with the cutter assembly, and a feed member which threadedly engages with the barrel assembly. Rotation of the feed member, in a first rotational direction, indexes the cutter assembly radially outwardly away from the cutter housing, while rotation of the feed member, in an opposite rotational direction, indexes the cutter assembly radially inwardly toward the cutter housing.
摘要:
A manhole cover frame removal apparatus has a ring-shaped base with a circular track thereon and a saw mounting framework disposed atop the base. Rollers allow the saw mounting framework to advance in rotation about aligned vertical axes of the frame and the base. A saw mounting arm is joined to the framework and may be raised and lowered and locked in the raised position. A saw carriage is mounted on the saw arm for reciprocal movement toward and away from a saw arm hinge axis. A single saw motor is mounted on the carriage and can be immobilized at selected angles. Separate horizontal-cut and vertical-cut saw blades are alternatively and interchangeably attached to the saw blade rotor.
摘要:
This invention provides a punch comprising: a center punch and an outer punch surrounding the outer periphery of the center punch, both of which being slidable and capable of compressing; and relative position restriction means for restricting a relative position of the center and outer punches, the relative position restriction means being configured to restrict a first position in which a punch tip of the center punch is protruded from a punch tip of the outer punch and a second position in which the punch tip of the center punch is substantially coincident with the punch tip of the outer punch, and being configured to fail to restrict a third position in which the punch tip of the center punch is retracted in the punch tip of the outer punch, as well as a rotary compression molding machine provided with the double-structured punch.
摘要:
A tube cutting assembly has a pair of opposite, rotatable cutting wheels, the outer of which is movable into engagement with a rotatable tube for cutting through the tube wall. Each cutting wheel is provided with a peripheral elastic ring which is configured to engage the tube wall and which is compressible towards the opposite cutting wheel. As a result, undesirable deformations of the cut tube end are avoided.
摘要:
A tube cutting assembly has a pair of opposite, rotatable cutting wheels, the outer of which is movable into engagement with a rotatable tube for cutting through the tube wall. Each cutting wheel is provided with a peripheral elastic ring which is configured to engage the tube wall and which is compressible towards the opposite cutting wheel. As a result, undesirable deformations of the cut tube end are avoided.
摘要:
A photosensitive material is mounted onto an inner surface of a cylindrical inner surface drum. An input signal which provides the size of the photosensitive material is supplied to a controller. As the controller drives a pulse motor under the control of a control signal, a moving part with which punching units are connected is moved in a circumferential direction of the drum by means of the pulse motor and positioned at the desired positions for punching. Then only two punching units, determined by the controller in accordance with the size of the photosensitive material, are driven to punch holes in the photosensitive material.
摘要:
A pipe cutting tool especially adapted to cut the interior of in-the-hole (I-T-H) drill pipe to allow subsequent removal of the pipe above the cut. Due to blasting damage, long sections of I-T-H pipe, otherwise in good condition, cannot be removed because the damaged section prevents the removal of the entire drill string. The tool is adapted to receive power from an external source and includes a frame, a pivoted motor and cutter, and an actuator for pivoting the motor.
摘要:
This disclosure describes a device for repeatably scribing a V-shaped scratch having sharply defined dimensions on the interior surface of a nuclear reactor fuel rod tube. A cutting tool having a V-shaped cutting tip is supported within the fuel rod tube so that the V-shaped cutting tip can be pivoted about an axis and scribe a scratch on the interior surface of the fuel rod tube. Lengthwise the scratch runs parallel to a line drawn through the axis of the fuel rod tube and is in the shape of an arc, and widthwise the scratch is V-shaped. This shape is used because the dimensions of the scratch can be plugged into appropriate formulas to calculate stress intensity of cracks in fuel rod tubes. Since the fuel rod tubes which are to be scribed may be radioactive, the scratching assembly is designed for use in a fixture which allows it to be operated in a cave by remote control handling devices.
摘要:
Apparatus for severing from a plurality of windings in a dynamoelectric machine stator a generally annular grouping of winding end turns extending from an end face of the stator. The apparatus has means movable generally in a predetermined plane for severing at least a portion of the winding end turns from the stator windings. Means for mounting the stator includes means for positioning the end face generally adjacent the predetermined plane and also means for supporting the winding end turns portion adjacent the end face and the plane upon the severance of the winding end turns portion in response to the movement of the severing means into severing engagement therewith.A method for severing the end turns from the stator winding, a method of mounting the stator having end turns adapted to be severed, and means for mounting a stator in apparatus for severing end turns from windings of the stator are also disclosed.