154results about "Boring/drilling apparatus" patented technology

In this thread cutting insert, on a common edge section of front and back faces of an insert main body, there is formed a pair of cutting edge sections that project from the edge section when seen from a direction facing the front and back faces, and on at least two of four projecting faces that respectively face the front and back face sides of the pair of these cutting edge sections, there is formed a thread cutting edge with the projecting face serving as a rake face.

The invention relates to a manual self-centering clamp for a thin-walled part. The manual self-centering clamp is characterized in that at least two groups of radial through holes are formed in a positioning column of a mandrel in the axial direction; each group of radial through holes comprise three or four radial through holes uniformly distributed in the same cross section of the positioning column; positioning clamping columns are connected into the radial through holes in a clearance fit manner; a multi-stage cone shaft is connected into a step inner hole of the mandrel in a clearance fit manner; a reset spring connected onto the multi-stage cone shaft in a sleeving manner is mounted between a boss at the front end of the multi-stage cone shaft and the front-end step surface of the step inner hole; the rear end of the multi-stage cone shaft is connected with an inner hole of an end cover in a clearance fit manner, and the end cover is fixedly connected onto the rear end of the positioning column; conical columns corresponding to the groups of radial through holes are arranged in the middle of the multi-stage cone shaft; each conical column comprises a front-end circular truncated cone and a rear-end circular truncated cone; the conical column surface of each conical column is contacted and connected with the bottom end of the corresponding positioning clamping column; a connecting base is arranged on the end cover; a manual driving rod is mounted in the connecting base; the driving end of the manual driving rod is contacted and connected with the bottom surface of a groove in the rear end of the multi-stage cone shaft.

A curtain assembly comprises a rotatable drive element wherein at least one helical guide structure is formed on, or into, the outer surface of the drive element. A drive attachment element having a structure that communicates with the helical guide structure to move the drive attachment element axially along the drive element when the drive element is rotated. Specific embodiments incorporate either a manual or motor-driven rotation assembly for rotating the drive element. Further specific embodiments involve a helical guide structure that comprises a helical groove and a structure that comprises a tooth that engages with the helical groove.

Pipe machining apparatuses are provided. In some aspects, a pipe machining apparatus may include a hinge to allow two sections of the pipe machining apparatus to move relative to one another. In another aspect, a support member may be provided to support a pipe machining apparatus on a surface. In a further aspect, a support member may be provided that allows lifting of a pipe machining apparatus in either a horizontal position or a vertical position.

The tubular cutter disclosed herein is useful for severing downhole tubulars and comprises a drive system, a pivoting system, a cutting head, and a cutting member. Cutting is accomplished by rotatingly actuating the cutting head with an associated motor, and then radially extending the cutting blade away from the cutting head. In one embodiment, the cutting head includes a cutting member that pivotally extends from the cutting head upon rotation of the cutting head.

Pipe machining apparatuses are provided. In some aspects, a pipe machining apparatus may include a hinge to allow two sections of the pipe machining apparatus to move relative to one another. In another aspect, a support member may be provided to support a pipe machining apparatus on a surface. In a further aspect, a support member may be provided that allows lifting of a pipe machining apparatus in either a horizontal position or a vertical position.

A clamping device (01), for use on a lathe, includes a plurality of basic clamping supports (06), which can be moved in a star-shaped formation in relation to an axis of rotation and on each of which a clamping jaw (11) for clamping workpieces can be attached. The basic clamping supports (06) can be adjusted simultaneously by means of an adjusting drive (21, 36) of the clamping device (01). At least two basic clamping supports (06) are coupled directly or indirectly to one another by an outer rocker (15). At least in the middle of the adjusting path, a limited inward displacement of a basic clamping support (06a, 06c, and 06b, 06d, respectively) leads to a swiveling of the outer rocker (15a, 15c) and an outward displacement of the other coupled basic clamping support (06b, 06d, and 06a, 06c, respectively).

Disclosed is a dedicated machine capable of cutting or beveling a pipe, such as a circular pipe or bar, in such a manner that a cutter unit rotates around the pipe while cutting any one surface of thepipe after gripping and fixing the pipe. A pipe cutting and beveling machine, according to the present invention, comprises: a main body unit in which a pipe passes through the center portion thereofso as to be fixed; and a cutter unit which is coupled to the main body unit so as to cut or bevel the pipe by means of a cutting blade while rotating around the fixed pipe, wherein the cutter unit may be provided with a rotating unit on one side thereof so as to pull the cutter unit aside and a locking unit on the other side thereof so as to restrain or release the cutter unit from being pulled aside. In addition, an entry control unit, which operates the cutter unit to move forward or backward, may comprise: a lever which is gear-engaged with an outer side surface of an entry control plate;and a clutch which is formed on a rotation shaft of the lever such that the restraint thereof is released when the lever is lifted or pressed in the axial direction.

A clamping device (01), for use on a lathe, includes a plurality of basic clamping supports (06), which can be moved in a star-shaped formation in relation to an axis of rotation and on each of which a clamping jaw (11) for clamping workpieces can be attached. The basic clamping supports (06) can be adjusted simultaneously by means of an adjusting drive (21, 36) of the clamping device (01). At least two basic clamping supports (06) are coupled directly or indirectly to one another by an outer rocker (15). At least in the middle of the adjusting path, a limited inward displacement of a basic clamping support (06a, 06c, and 06b, 06d, respectively) leads to a swiveling of the outer rocker (15a, 15c) and an outward displacement of the other coupled basic clamping support (06b, 06d, and 06a, 06c, respectively).