DE202010013768U1 - Device for separating a pipe - Google Patents

Abstract

Apparatus for separating or cutting a pipe in which the pipe (1) is to be clamped in a right (2) and a left (3) matrix combination, the apparatus comprises a separating knife (4) and a rough cutting knife (90 °) ( 5), characterized in that the separating knife (4) is pivotally arranged to perform the pivoting movement of the cutting blade (4) is assigned to a pivot axis (7) and provided by means of preferably hydraulic drive slide (6) is provided.

Description

One in the pipe separation technique common and common method is that using a Vorschneidemessers a slot is generated in the pipe wall, a cutting knife passed through this slot and the pipe is separated by this.

ever according to the depth of the slot have different disadvantages.

is For example, the slot is too shallow, d. H. the depth is lower as the wall thickness, so the severing knife the tube well without unwanted Deformations separate, however, it pushes with its wedge-shaped Tip the remaining wall and adjacent areas into the pipe. With progressive penetration of the cutting blade forms on both sides to Cutting knife the chip to be cut out inside the pipe too a role that starts at a certain depth of penetration of the cutting knife forcibly pushed outward by its wedge angle becomes. In this phase, not the cutting knife cuts the pipe, but the rolled chip. It is created at the interface a very large roughening, solving individual particles from the roll-shaped chip and fall into the pipe. Both Apparitions are pronounced quality defects for the cut.

A Enlargement of the slot depth can at least at round tubes solve the problem alone, since the intrinsic stability of the tube forms the boundaries for the slot depth by the tube deforms when the slot depth is exceeded, which is allowed at most on subordinate components is. It is always a defect.

Out The practice is known that there is no at least in round tubes Compromise solution gives a sufficiently large Slit depth connects with a slender cutting knife that the o. b. Disadvantages would be completely eliminated.

One of the disadvantages of having device is in the DE-OS 36 41 886 A1 explained.

There are devices that do not have the disadvantages described, z. B. DE 100 29 195 C1 , However, these work with an inner die to support pipe stability; but they are not always applicable. Their use fails z. B. in long or curved pipes.

Out the disadvantages mentioned, the invention makes the task, a Device for cutting or cutting tubes to provide ensures that both on the pipe inner wall as well only minimal burr formation occurs on the tube outer wall and the tube remains free of detachment during the cutting process Particles.

These The object is achieved with the preamble of the protection claim 1 according to the invention thereby solved that by the special process steps and the constructive arrangement of the cutting elements a burr-less and Particle-free separation of pipes is possible as well flat cut surfaces arise.

In the separation device according to the invention is after clamping the pipe with the help of the right and left die combination initially arranged with the 90 ° to the cutting knife Vorschneidemesser a groove introduced into the pipe wall, whose Depth only slightly exceeds the wall thickness of the pipe itself. There is a possibility that individual particles can form at the resulting cut edges. In the further Sequence of the process, the cutting knife dives in a first stroke centrally in the existing transverse groove such that only the front knife part almost non-contact in the transverse groove located. With the help of the slide now the cutting knife over its pivot axis is deflected upwards and downwards to follow to return to its middle position.

By these deflections, the transverse groove is widened so far that Upon further penetration of the separating knife, the residual wall thickness completely is peeled off to the outside. The big opening in the pipe wall allows the cutting blade no Needed for damage prone tip and the cutting blade itself be kept comparatively short can. This results in the advantage of a relatively small Trennhubes.

From However, a particular advantage is the fact that in the first cutting process resulting peaks by swinging the cutting blade to an implied role to the outside.

Further advantageous embodiments of the invention Solution emerge from the dependent claims of Main claim.

The The following embodiment shows the inventive Solution.

The Drawings show:

1 : The arrangement of the roughing knife 5 , the cutting knife 4 with its pivot axis 7 , the right and left matrices 2 ; 3 , the slider 6 as well as the pipe 1 with the transverse groove 8th

2 : The pipe 1 with cutting knife immersed in the widened transverse groove 4 at Trennbe ginn system of the wedge-shaped part of the separating knife 4 on the roll-like formation of the transverse edge 9

With the help of the upper and lower jaw combinations 2 ; 3 - in 1 is in each case the front jaw for clarity not shown - is the tube 1 locked against rotation. The 90 ° to the cutting knife 4 arranged Vorschneidemesser 5 initially generates a transverse groove in the pipe wall 8th whose depth is the wall thickness of the pipe 1 itself only slightly exceeds. As the process progresses, the cutting knife emerges 4 in a first stroke section centered in the transverse groove 8th in such a way that only the front blade part almost without contact in the transverse groove 8th located. With the help of the slider is now the cutting knife 4 over its pivot axis 7 deflected upwards and downwards, and then returned to its middle position.

According to 2 dive now the cutting knife 4 in the widened transverse groove 8th and peels at the complete cutting of the pipe 1 the rest of the pipe wall completely outwards.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 3641886 A1 [0006]
• - DE 10029195 C1 [0007]

Claims (5)

Device for separating or cutting a pipe in which the pipe ( 1 ) in a right ( 2 ) and a left ( 3 ) Matrikenkombination is to clamp, the device is a cutting knife ( 4 ) and a pre-cutting knife arranged at an angle of 90 ° ( 5 ), characterized in that the separating knife ( 4 ) is pivotally to arrange the execution of the pivoting movement of the cutting blade ( 4 ) a pivot axis ( 7 ) and a slide provided by means of a preferably hydraulic drive ( 6 ) is to be provided. Device for cutting or cutting a pipe according to claim 1, characterized in that the slide ( 6 ) is to be equipped with two spherically shaped pressure surfaces. Device for separating or cutting a pipe according to claim 1 and 2, characterized in that the slide ( 6 ) is divided into two parts and each slide half is assigned to a separate preferably hydraulic drive. Device for separating or cutting a pipe according to claim 1, characterized in that the separating knife ( 4 ) with a flat cutting edge ( 10 ) is to be provided. Device for separating or cutting a pipe according to claim 1, characterized in that the separating knife ( 4 ) with a parallel cutting section ( 11 ) is to be provided.