Abstract: A machining device for machining the lateral surface of an approximately cylindrical object in portions thereof includes a chain for annularly surrounding the object to be machined. The chain consists of at least two hingedly connectable chain links, one of which is a tool holder having at least one tool for machining the lateral surface. The device also includes support rollers for rolling on the lateral surface. The at least one other chain link is a chain connecting link. The chain links are connectable in such a way that they form a closed chain ring around the object to be machined. The machining device further includes a feed adjuster capable of reversibly adjusting an axial position of facing ends of two chain links parallel to the axis of the closed chain ring relative to each other.

Abstract: A machining device for machining the lateral surface of an approximately cylindrical object in portions thereof includes a chain for annularly surrounding the object to be machined. The chain consists of at least two hingedly connectable chain links, one of which is a tool holder having at least one tool for machining the lateral surface. The device also includes support rollers for rolling on the lateral surface. The at least one other chain link is a chain connecting link. The chain links are connectable in such a way that they form a closed chain ring around the object to be machined. The machining device further includes a feed adjuster capable of reversibly adjusting an axial position of facing ends of two chain links parallel to the axis of the closed chain ring relative to each other.

Abstract: A peeling tool designed for at least partially stripping the outer peripheral surface of rotationally symmetric objects, in particular cylindrical plastic pipes, with the peeling tool featuring a peeling head with a drive shaft having a longitudinal axis and coaxially to this drive shaft arranged cylindrical blade roller. The cylindrical blade roller moves with the drive shaft. The peeling tool also featuring at least one peeling blade inside the blade roller with the peeling blade having a cutting edge which extends beyond the blade roller surface and defines the maximum outer diameter of the peeling head. The peeling tool also features two cylindrical guide elements with longitudinal axes, which are mounted to the face sides of the blade roller in a coaxial arrangement.

Abstract: A method to optimize the welding energy input into the heating coil of a heating coil fitting is disclosed. In particular, the invention pertains to a compensation method for the effects on the welding energy input from using a fundamental frequency outside the tolerance range for the AC welding voltage established for the heating coil fitting. A generator is one option to supply power to a device for the implementation of the invention-based method. It supplies an AC welding voltage to the heating coil with a fundamental frequency outside the tolerance range for the AC welding voltage as marked out for the heating coil fitting. Another option is especially the use of DC welding voltage for the heating coils of heating coil fittings. To execute the method, a welding power supply unit is connected to the contact elements of a heating coil fitting via connecting leads and connecting elements.

Abstract: A peeling tool designed for at least partially stripping the outer peripheral surface of rotationally symmetric objects, in particular cylindrical plastic pipes, with the peeling tool featuring a peeling head with a drive shaft having a longitudinal axis and coaxially to this drive shaft arranged cylindrical blade roller. The cylindrical blade roller moves with the drive shaft. The peeling tool also featuring at least one peeling blade inside the blade roller with the peeling blade having a cutting edge which extends beyond the blade roller surface and defines the maximum outer diameter of the peeling head. The peeling tool also features two cylindrical guide elements with longitudinal axes, which are mounted to the face sides of the blade roller in a coaxial arrangement.

Abstract: The present invention relates to a skiving apparatus for at least partial removal of the outer circumferential surface of rotationally symmetric objects, in particular cylindrical plastic pipes, said apparatus containing a bell-shaped housing with a central longitudinal axis, said housing having a skiving recess which is coaxially aligned with the central longitudinal axis—and outwardly open at one end face of the bell-shaped housing via a feed opening. Disposed in said housing is a blade which projects into the skiving recess with its cutting edge aligned preferably parallel to the central longitudinal axis of said housing. According to the invention, the blade is mounted in a blade guide such that the blade is reversibly displaceable in the direction of the central longitudinal axis of the housing.

Abstract: An apparatus for paring tubular articles (R), especially for plastic tubes, has at least one support unit (10) for supporting the article (R) to be pared, a paring unit (40) which has a paring head (44) with at least one blade assembly (46) and at least one guide assembly (48), and a carrier unit (70) to which the support unit (10) and the paring head unit (40) are held in mutually spaced relationship. The paring head (44) is pivotable about a pivot axis (50) which extends at least approximately perpendicularly to the plane defined by the support unit (10) and the paring unit (40).

Abstract: A method to optimize the welding energy input into the heating coil of a heating coil fitting is disclosed. In particular, the invention pertains to a compensation method for the effects on the welding energy input from using a fundamental frequency outside the tolerance range for the AC welding voltage established for the heating coil fitting. A generator is one option to supply power to a device for the implementation of the invention-based method. It supplies an AC welding voltage to the heating coil with a fundamental frequency outside the tolerance range for the AC welding voltage as marked out for the heating coil fitting. Another option is especially the use of DC welding voltage for the heating coils of heating coil fittings. To execute the method, a welding power supply unit is connected to the contact elements of a heating coil fitting via connecting leads and connecting elements.

Abstract: An apparatus for paring tubular articles (R), especially for plastic tubes, has at least one support unit (10) for supporting the article (R) to be pared, a paring unit (40) which has a paring head (44) with at least one blade assembly (46) and at least one guide assembly (48), and a carrier unit (70) to which the support unit (10) and the paring head unit (40) are held in mutually spaced relationship. The paring head (44) is pivotable about a pivot axis (50) which extends at least approximately perpendicularly to the plane defined by the support unit (10) and the paring unit (40).

Abstract: An apparatus for paring tubular articles (R), especially for plastic tubes, has at least one support unit (10) for supporting the article (R) to be pared, a paring unit (40) which has a paring head (44) with at least one blade assembly (46) and at least one guide assembly (48), and a carrier unit (70) to which the support unit (10) and the paring head unit (40) are held in mutually spaced relationship. The paring head (44) is pivotable about a pivot axis (50) which extends at least approximately perpendicularly to the plane defined by the support unit (10) and the paring unit (40).

Abstract: In a method and apparatus for measuring the welding voltage at the heating coil of a heating coil fitting a welding current supply unit is connected to the connecting elements of the heating coil fitting by way of connecting lines and junction elements, and the welding voltage is detected by means of a voltage measurement unit. The welding voltage is detected at a respective contact of each of the two connecting elements of the heating coil fitting in electrically insulated relationship with respect to the connecting lines and the junction elements.

Abstract: An apparatus for paring tubular articles (R), especially for plastic tubes, has at least one support unit (10) for supporting the article (R) to be pared, a paring unit (40) which has a paring head (44) with at least one blade assembly (46) and at least one guide assembly (48), and a carrier unit (70) to which the support unit (10) and the paring head unit (40) are held in mutually spaced relationship. The paring head (44) is pivotable about a pivot axis (50) which extends at least approximately perpendicularly to the plane defined by the support unit (10) and the paring unit (40).

Abstract: Described is a paring device for cylindrical objects, in particular for plastic tubes, which comprises a plurality of rollers (7) assembled to form a running trough (3); a paring head (2) including at least one knife (5) and at least one guide roller (6), and a spindle drive (4) connecting the running trough (3) and the paring head (2). The spindle drive comprises a spindle guide provided with a slot-like opening and a spindle with an actuating handle (9) that is rotatable in the spindle guide, whereby the paring head and the running trough, between which the cylindrical object can be fixed, can be driven in relation to one another via the spindle. In order to enhance the handling of the paring device also for the treatment of saddle zones of cylindrical objects, the at least one guide roller (6) is supported in a bearing block (10) and freely rotating therein.

Abstract: Described is a paring device for cylindrical objects, in particular for plastic tubes, which comprises a plurality of rollers (7) assembled to form a running trough (3); a paring head (2) comprised of at least one knife (5) and at least one guide roller (6), and a spindle drive (4) connecting the running trough (3) and the paring head (2). The spindle drive comprises a spindle guide provided with a slot-like opening and a spindle with an actuating handle (9) that is rotatable in the spindle guide, whereby the paring head and the running trough, between which the cylindrical object can be chucked, can be driven in relation to one another via the spindle. In order to enhance the handling of the paring device also for the treatment of saddle zones of cylindrical objects, the at least one guide roller (6) is supported in a bearing block (10) and freely rotating therein.

Abstract: In a method and apparatus for measuring the welding voltage at the heating coil of a heating coil fitting a welding current supply unit is connected to the connecting elements of the heating coil fitting by way of connecting lines and junction elements, and the welding voltage is detected by means of a voltage measurement unit. The welding voltage is detected at a respective contact of each of the two connecting elements of the heating coil fitting in electrically insulated relationship with respect to the connecting lines and the junction elements.

Abstract: A heating coil fitting for connecting at least two installation elements with a fitting pipe which overlaps the installation elements. The fitting pipe has a first material which breaks down during heating and a second material which shrinks during heating. A heating element in the fitting pipe wall has a cross-sectional surface area whose extent along the longitudinal axis of the fitting pipe is less than that in the radial direction of the fitting pipe.

Abstract: In an electric welding apparatus for automatically welding heating coil fittings substantially of plastic material a scanner (3) for scanning fitting data is connected via a converter to a first input of a controller (8) which via a power station (13) controls, for a welding period, the welding power output. In order to reach an optimal welding factor of the welding the scanner (3) and the converter (4) are provided for scanning naominal welding energy data of said fitting (1). At least a second input (at 12) of the controller (8) is connected to circuits (calculator 11) which generate signals of the actual welding energy from welding power output data as well as from the actual welding period.