Abstract: A control element (1) adapted to prevent an external-flange angle iron from being twisted during its bending is applied to a variable-radius bending machine, on which an angle iron (10) is worked by deformation by means of at least two couples of lower co-axial rollers (7, 8, 7′, 8′) and at least a third upper roller (9), the one flange (11) of the angle iron (10) being clamped by the lower rollers (7, 8, 7′, 8′), and the other flange (12) facing outward. The control element (1) comprises a frustoconical head (2) pivoted on a stem (3) designed to be received into a co-axial housing hole that is frontally performed on the support element (13) of a cylindrical control roller (14), having three degrees of freedom, of the bending machine.

Abstract: A multipurpose horizontal press having a fixed workpiece-holder for a tubular workpiece to be drawn or tapered comprising a press body (1) surmounted by a worktable (2), having a superior surface (3) and an inferior surface (4), on the worktable (2) being positioned horizontally an operating hydraulic cylinder and, in correspondence with a through opening (70), a bridge (8) to which inferiorly a superior jaw (12) having its concavity facing downward, is rigidly connected. Opposite to the bridge (8) a support element (13) extends under the inferior surface (4) and supports a clamping hydraulic cylinder (14), having a rod (15) facing upward and provided with an inferior jaw (16), being sledge vertically inside said bridge (8) toward the superior jaw (12) and away from it.

Abstract: A hydraulic circuit for linearly driving a movable roller-holder slider of a pipe bending machine, comprising a hydraulic cylinder (5) whose piston rod is connected to a slider holding a movable roller, the cylinder being fed with pressurized fluid from a reservoir (16) by a pump (15), through a three-position four-way valve (18), a check valve (12, 13) and an interposed throttling valve (19), that is operated to generate an increased pressure in said low pressure chamber of the hydraulic cylinder (5) in order to slow down the slider holding the upper roller in its primary motion when a programmable interval is reached from said predetermined position for each working pass.

Abstract: A hydraulic circuit for linearly driving a machine-tool slider in both directions, comprising an hydraulic cylinder (5) whose piston rod (4) is connected to a slider and which is fed with pressurized fluid from a reservoir (14) by a pump (15) through a three-position four-way valve (18), a check valve (12-13), and between the last ones, a pair of throttling valves (19, 19′) which are mounted symmetrically each other and operated to generate an increased pressure in either one or the other chamber, which is at the moment in a low pressure, of the hydraulic cylinder (5) in order to slow down said slider in its work motion in both directions of linear travelling when a programmable interval is approached from a predetermined position for each working pass.

Abstract: A curling machine provided with an adjusting device for evenly winding elongated workpieces into spirals, comprises a machine frame (1) sustaining a horizontal worktable (2); a vertical axis mandrel for a curling tool (4) and provided with counteracting means (26) of elongated workpieces passing through said worktable (2). The counteracting means (26) is connected to an actuator in the form of an oleodynamic cylinder (26) which is fixed on the worktable (2) and provided with a rod (23) carrying a tool holder (24) in the free end of the rod, said vertical axis mandrel (3) being removable from the horizontal worktable (2).

Abstract: A shaping pulley assembly (6) for a belt notching machine, including on a frame (1) a pair of driving and shaping pulleys (3, 4) for a grinding belt (5), comprises a shaping pulley holder element (9) like a fork supported by the frame (1), having a C-shaped body with end brackets (90, 91), a stationary centre and a removable counter-centre, both being live centres which are housed in respective said housings of the end brackets (90, 91), a shaping pulley (4) in the form of a cylindrical roller provided with centre holes (42, 43) opposite to each other for fixed centre and removable counter-centre, respectively on the bases (40, 41) of the shaping pulley.

Abstract: A tubular workpiece notching machine usable for general grinding operations has a worktable (1) whose base plate (10) is pivotally mounted to the frame (6) of the notching machine around a pivotal orthogonal axis (Y-Y) in such a manner that the worktable (1) is movable from a first working position in which the machine vice (2) co-operates with the shaping pulley (3) in recessing ends of tubular workpiece by grinding, to a second working position in which the shaping pulley (3) is used for generally grinding a workpiece. Connecting means are provided for removably anchoring the base plate (10) of the worktable (1) to the frame (6) in the first working position.

Abstract: Worktable for an apparatus for grinding recesses A worktable for an apparatus for grinding recesses, having on a frame (3) a pair of pulleys carrying a grinding belt (2), is provided with a sole control member (19) to approach and move apart said workpiece vice (20) with respect to said shaping pulley (1) of said pair of pulleys.

Abstract: A twisting machine for polygonal cross-section bars having an independent jaw chuck fitted on a mandrel and a counteracting support slidable on a prismatic guide, which is firmly connected to the machine and parallel to the mandrel; the jaw chuck includes a mutually co-operating rotary connection between the mandrel and the chuck in the form of a groove for ball-recirculating and a mutually engagement, such as an abutment projection diametrally projecting from and integral with the mandrel and a longitudinal pin connected to the chuck, which are adapted to drive into rotation the chuck by the mandrel, after a free rotation of the mandrel along an arc with an angle less than a round angle.

Abstract: A bending machine includes a bending head with three bender rollers, one of which is vertically displaceable with a double-acting cylinder having a cylinder body inside the bending machine frame and below the bending head. A work surface is above the bending head and provided with an opening coaxial with the double-acting cylinder. The work surface includes a support for a tool driven by the cylinder.

Abstract: A bending machine to wind a strip or the like into a spiral comprising a mandrel (2), a bending tool (3), including a grip portion (32) of an end (50) of a strip (5) and a supporting, guiding and counteracting element (4) on a table (1) of the bending machine is disclosed. The bending tool (3) further comprises a plurality of modular elements (60, 61, 62, 63, 64 . . . ) consecutively so jointed to be relatively movable according to predetermined plane rotations, connected to the grip portion (32), so that, in the rotation of the mandrel (2), the plurality of modular elements roll up on the grip portion (32), with the strip (5) being interposed, so that the path of radially internal and external surfaces of said modular elements are spiral and continuous. The supporting element (4) includes a friction roller-holder lever (40), which can be operated by a vise.

Abstract: Machine for bending pipes or section bars comprising a work table on which two or more powered spindle noses appear, at least one of which is powered to rotate in a direction and at least another is idle or driven to rotate in the opposite direction to the former one; said spindle noses being accessible for mounting/demounting on/from them spindles designed to support respective bender rollers or matrices defining a work area on the work table in order to bend a pipe or a section bar according to fixed or variable radiuses: support means for a counteracting member designed to co-operate with said bender rollers or matrices in a bending operation according to fixed or variable radiuses; said support means being firmly locatable on straight guide means in said work table along an approachment/removal direction of said counteracting member to/from, said work area.

Abstract: A bending machine includes a bending head with three bender rollers, one of which is vertically displaceable with a double-acting cylinder having a cylinder body inside the bending machine frame and below the bending head. A work surface is above the bending head and provided with an opening coaxial with the double-acting cylinder. The work surface includes a support for a tool driven by the cylinder.

Abstract: A pipe bending machine with a bending assembly (1) and a support arm (2), pivotedly supported swingingly relative to the bending assembly through a pivot (6) that is slidably supported along a stem (7) on the axis passing through the center of rotation of the matrix and the center of swinging of the countermatrix assembly (the "zero"), so as to automatically position and axis of the pipe on the zero.

Abstract: A support arm assembly for a pipe bending machine, including one or more linear ledges arranged along the arm; a mandrel including a piece for intercepting the ledges through a click (106) switching between a raised rest position and a lowered working position by the displacement of an eyelet, in which it can slide, having raising edges (105) against which click (106) is loaded, under the actuation of an air cylinder, under the control of means that also control the opening/closing of the pipe carrier gripper (16) of the mandrel; and angular ledge dowels with a sense cut (200) being provided on the periphery of the mandrel, cooperating with a spring-loaded locator.

Abstract: Universal pipe bender comprising a geared motor (1; 11); a box, on a working table whereof two or more pairs of hollow rotary motion drives having fixed parallel rotation axes (2, 2a; 2', 2a'; 2", 2a"; 12, 12'; 12a, 12a') intended to receive, interchangeably and integrally in rotation, in their concavity respective roller hearing mandrels (200) and to transmit to the latter rotary motion impressed by said geared motor through gears arranged in said case, and a through slide (4, 40) that can be slidingly operated and fixable in position in a through guide (4') provided in said case, on the same side where said rotary motion drives open, which traverses the fixed interaxes of said pairs of rotary motion drives, and which mounts one or more further roller hearing mandrels (5, 5'; 50, 50').

Abstract: Vise for clamping a pipe or rod or section bar or other mechanical part, with a jaw (3) and a counterjaw (3'), comprising a piston fixed in position by a support (10) with a rod (6) to the head of which said counterjaw (3') is rendered integral through a cart (7); pliers with two catches (9, 9') hinged upon said support (10) to rotate vertically and endowed with hooks (9a, 9a') fit for engaging two corresponding cavities (3a, 3a') provided on respectively upper and lower surfaces of said jaw, said catches having their profile with an inner and outer raising (12, 12a; 12', 12a') toward the exterior of the working field of the pliers themselves, said cart having two pegs (13, 13') respectively fit for engage each one of said outer raisings to cause the closing of the catches with the advancement of the cart by contrast against the outer raisings themselves, and pipe bending machine or rod or section bar bending machine that comprises it, with the jaw being integral with the matrix, as well as comprising a dragg

Abstract: An electric motor for portable machine tools, comprising an output shaft for operating, means for sensing the speed of said output shaft; means for sensing the magnitude and the phase of the input voltage of the electric motor itself; means for sensing the electric current absorbed by the load, microprocessor means programmed for processing the detected values sensed by said means for sensing; means for generating an acceleration ramp at the starting; means for generating a deceleration ramp at the stopping, as well as means for generating the cruise speed of the tool, voltage controlled by said microprocessor in response to said detected values processed by itself, and means for controlling the forward running, reverse running and the run storing.

Abstract: A coupling between the piston and cylinder controlling and actuating member and the bending head of a portable pipe bending machine comprising a collar (5) made up of two half collars (5', 5") with concavities complementary with the side wall of the cylinder (3), which are removably joined (6, 6') to each other to clamp the cylinder itself, one of them (5') being rigidly joined (6, 6') to the bending head (1), a coupling which is desired further comprises structure for preventing the axial displacement of the collar (5) upon the cylinder (3), particularly a groove (9', 9") on the collar and a complementary ridge (9) on the cylinder (3).

Abstract: A shaped groove countermatrix for a rotary groove pulley matrix and countermatrix head pipe bending machines has a semicircular cross-sectional tract and an end tract (2) tapered, both longitudinally and transversely according to substantially elliptic profiles (20). With respect to the preceding tract, an edge of a groove (10) remains at the same level. The end tract (2) has its cross section substantially determined by the arcs (4, 4') of two ellipses (12) with their major axes (6, 6') parallel to and slightly offset with respect to a plane of longitudinal symmetry (8) of the groove (10) which is inferiorly radiused by an arc which is elliptic too. The tapering of the end tract (2), starting from a substantially parabolic profile (14), has its axis on the plane of longitudinal symmetry (8) of the groove (10) and its convexity (16) at a short distance from the exit edge (18) of the groove (10).