DD297890A7 - KNIFE HEAD FOR THE SIMULTANEOUS DECESSION AND / OR BOTTLING OF THE INTERNAL AND OUTER EDGES OF TUBE ENDS - Google Patents

Abstract

The invention relates to a cutter head having loosely mounted in knife holders knife with which at the same time the inner and Auszenkanten of pipe ends are machined. The design of the cutter head is characterized in that the cutter holders are guided axially in a head part and associated with each knife holder on the back side communicating pistons arranged in a web wall and in contact with a pressure transfer means located behind the web wall. An application possibility is given for both small and larger pipe diameters. Fig. 1 {cutter head; Knife system, uniform; for pipe end machining; deburring; chamfering}

Description

forward to the Druckübertragupgsmittel. The crosswise arranged knife holder are provided diametrically within the sleeve-shaped Kopiteils with claw-shaped intermeshing legs, and fixed by means of axially parallel in the web wall mounted guide pin in its cross-like position. When using the cutter head, in particular in the vertical feed direction, it always appears expedient, in order always to maintain contact between knife holders and pistons, to provide a spring arrangement in which a tension spring fastened in the web wall is passed through a central bore of the knife holder, anchored in front of the front knife holder. Coaxial to the Zugfed. -is arranged a compression spring, which bears with its one end on a shoulder d * ^r central bore in the front leg and with its other end against the front side of the rear knife holder fitting. Now can be provided with uniformly executed Entgratungs- or welding chamfers on inner and outer edges of the pipe ends without great expenditure of time, which is required for the constant readjustment of the knife, production-related diameter or wall thickness variations. In addition, the execution principle for both small and ur relatively large pipe diameter applicable.

embodiment

The invention is explained in more detail with reference to embodiments which are illustrated in the drawing. Show it

1: the section A-A of FIG .. 2

Fig. 2: the view from the direction of arrow B with broken knife holders

Fig. 3: a further embodiment possibility of the designated "C" front portion in the form of a section, shown enlarged.

The main body of a knife head consists essentially of a sleeve-shaped head part 1, from a located in the standard kererkfachfachaler level web wall 2 and located behind the web wall 2 space 3, which is filled with a plastic or liquid pressure transmission means 3 '. Knife holder 4.5 have interchangeable fixed blades 6, 7, which are also known cutting inserts or otherwise. Of the two knives 6, 7 which are provided on each knife holder 4 and 5, only one knife is shown in each case, with the knives 6 in the front knife holder 4 the inner edge and with the knives 7 in the rear knife holder 5, the outer edge of FIG 1 indicated pipe end is machinable. The knife holder 4.5 are cross-like, diametrically disposed within the sleeve-shaped head part 1 and guided axially movable in this. The intersecting legs of the knife holder 4.5 are formed claw-like interlocking and fixed by achsparalleio in the web wall 2 fixed guide pin 8 in ihi or cross-like position. Each knife holder 4 and 5 are assigned to the rear piston 9 and 10 communicating, which are axially slidably positioned in the web wall 2 and arranged in dan space 3 protruding. In addition to this projecting into the space pressure surface position of the piston 9,10 may also be a not shown shorter piston design with located within the piston guide pressure surface including a different number of pistons 9,10 are used for the application. Weser.tlich is that the pressure surfaces of the piston 9 and the pressure surfaces of the piston 10 on the side of the pressure-transmitting means 3 ', are the same size, in total. If the cutter head is used in particular for vertical feed directions, a spring arrangement should be provided, as shown for example in FIG. An attached to the web wall 2 tension spring 11 is passed through central holes 12,12 'of the knife holder 4,5 and anchored in front of the front knife holder 4. Coaxially to the tension spring 11, a compression spring 13 is arranged, which is supported with its one end to the shoulder 14 of the central bore 12 in the front knife holder 4 and with its other end against the shoulder 14 'of the bore 12' in the rear knife holder 5 fitting. This spring arrangement ensures a constant concern of Messerh liter 4.5 to the piston 9,10.

The mode of action is the following

If, while the feed is taking place-regardless of whether the workpiece is brought to the knife head or the cutter head is brought to the workpiece-only a contact of the knife with a tube machining edge, the axial force component acting on the adjoining knives takes place during further feed Piston and the pressure transmission means as long as a one-sided force impact until the other knife to the other processing edge. There is then a force balance, εο that with constant machining of inner and outer edge of the pipe end uniform chamfer widths available

Claims (3)

1. cutter head for simultaneous deburring and / or chamfering the inner and outer edges of Rohi ends provided separately for the inner edges and outer edges provided in cross-like knife holders knives, characterized in that the knife holder (4,5) axially outside in a tubular head part (1) guided and associated with each knife holder (4,5) on the back communicating in a normal in Koperkopfachsaler level web wall (2) arranged pistons (9,10) are assigned to the blade holder (4,5) facing away from the web wall side contact with a plastic or liquid pressure transmission means (3 ') located in a space (3) behind the web wall (2), wherein the pressure surfaces of the piston 9 and the piston 10 on the side of the pressure transmission means 3' are equal in total. 2. Knife head according to claim 1, characterized in that the cross-like arranged knife holder (4,5) arranged diametrically within the sleeve-shaped head part (1) with claw-like intermeshing legs and fixed by means of axially parallel guide pin (8) in its cross-like position. 3. cutter head according to claim 1 and 2, characterized in that the knife holder (4,5) by means of a spring arrangement with the piston (9,10) are arranged axially contact holding, wherein in the web wall (2) fixed tension spring (11) central bores (12,12 ') of the knife holder (4, 5) guided in front of the front knife holder (4) is anchored and a compression spring (13) with its βΐηβη end to a shoulder (14) of the bore (12) of the front knife holder (4) and supported with its other Endo against the rear knife holder (5) fitting. For this 1 page drawings Field of application of the invention The invention relates to a cutter head for simultaneous deburring and / or chamfering of the inner and outer edges of pipe ends with separately provided for the inner edges and outer edges in kreuzartig arranged knife holders forti en knives. Characteristic of the known state of the art There are numerous devices, facilities, cutter heads, Rohrentgrater and the like. Known for many years, which have for deburring or chamfering and sometimes also for machining of pipe ends blades with which at the same time the inner edges and the outer edges of the pipe ends are machined. In some cases, the knives for both types of edges are adjustable or deliverable with respect to their position, sometimes countersunk tools are also used for the application mentioned at the beginning, in which additional knives, which are manually adjustable in their position, are used for external cultivation. In all these embodiments is disadvantageous that in existing requirements for uniform chamfers on the pipe ends, the position of the knife must be re-fixed, since production, the outer and / or inner diameter and the wall thickness of the tubes differ from each other. The state of the art is represented by the patents DD-PS 67645 and DE-OS 3327017. Object of the invention It is the above dimensional deviations of pipes with each other without repositioning and Neufixiei tion of the blades used for deburring and / or chamfering the pipe ends to obtain a uniform chamfer, Presentation of the essence of the invention According dt> r task is the above objective with a knife head design to be solved so that the above dimensional deviations a simultaneous concern of the cutting tools is ensured both on the outer edge and on the inner edge of the pipe end to be machined. The solution is carried out by in a sleeve-shaped head portion of the cutter head axially guided knife holder and associated with each blade holder backside communicating pistons, which are arranged in a provided in messerkopfachsnormaler level web wall. On the web wall side facing away from the Mcsser holder, a space filled with a plastic or liquid pressure-transmitting means is arranged, wherein all the pistons have direct contact with the pressure-transmitting means. The size of the pressure surface of the piston on the side of the pressure transmitting means is the same total for the piston, which once transferred the force when the knife is applied to the outer edge of the pipe and forr, other for the piston, the force when the knife on the inner edge of the pipe