A MANDREL ADJUSTMENT ASSEMBLY FOR A MULTI-WALL PIPE PRODUCTION MADE OF COATED METAL SHEET

Abstract

Invention relates to is a mandrel adjustment assembly for multi-wall pipe made of a coated metal sheet comprising; a bearing positioning an elongated mandrel over a tray by holding; a distance adjustment unit having an adjustment member adjusting a stroke distance of mandrel by changing axial location of bearing; a first support and a second support holding mandrel over a tray such that the mandrel is freely movable between a distal end and an opposite proximal end. A distance adjustment unit is equipped with a display enabling visual access to a stroke distance set by an adjustment arm and the distance adjustment unit move the mandrel over the tray providing a displacement equal to stroke distance.

Claims

1. A mandrel adjustment assembly for multi-wall pipe made of a coated metal sheet comprising; a bearing positioning an elongated mandrel over a tray by holding; a distance adjustment unit having an adjustment member adjusting a stroke distance of mandrel by changing axial location of bearing; a first support and a second support holding mandrel over a tray such that the mandrel is freely movable between a distal end and an opposite proximal end characterized in that distance adjustment unit is equipped with a display enabling visual access to a stroke distance set by an adjustment arm and the distance adjustment unit move the mandrel over the tray providing a displacement equal to stroke distance.

2. The mandrel adjustment assembly according to claim 1, wherein a holding arm on which the display is adapted to measure the stroke distance and moving while pushing the bearing supported by the tray from one end thereof.

3. The mandrel adjustment assembly according to claim 2, wherein a housing on which the display is mounted and the holding arm telescopicaly received is secured to the bearing.

4. The mandrel adjustment assembly according to claim 3, wherein the holding arm is vertically positioned at the support edge of tray from a free end of the tray.

5. The mandrel adjustment assembly according to claim 1, wherein the length of tray is greater than length of the mandrel.

6. The mandrel adjustment assembly according to claim 1, wherein the first support and the second support are located at a vicinity of the corresponding edges of the tray.

7. The mandrel adjustment assembly according to claim 1, wherein the adjustment member comprises a rotary arm.

8. The mandrel adjustment assembly according to claim 1, wherein a rotation axis of the adjustment member is placed vertical to stroke axis of the mandrel.

9. The mandrel adjustment assembly according to claim 1, wherein the display comprises a digital monitor.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0013] FIG. 1 is top schematic view of a representative embodiment of a mandrel adjustment assembly used in made from coated metal sheet for multi-wall pipe production platform.

DESCRIPTION OF EMBODIMENTS

[0014] In this detailed description, the invention subject is described with reference to illustrative examples for the better understanding of the present invention without limiting it in any way.

[0015] In FIG. 1, schematic top view of a mandrel adjustment assembly disposed at a pipe forming region (1) in multi-wall pipe production is shown. In the pipe forming region (1) a rectangular tray (50) is placed longitudinally. From a support edge (52) that a short edge of the tray described a distance adjustment unit (20) outward carries the mandrel (30) as allowing it to progress. In the tray (50) to the opposite edge (54) that is in the opposite direction of support edge (52) and fixed as in a transverse manner as close to the support edge (52) in order a first support (10) and a second support (40) hangs the mandrel (30) over the tray (50). First support (10) bears a front roll (14) which is in close location to a proximal end (32) of mandrelin (30), with two opposite ends with at each en done front bearing (12) as rotatably. On the other hand first support (10) and equal structured second support (40) bears a rear roll (44) which is attached as rotatably between one pair rear bearing (42), that is parallel to mandrel's (30) extension axis, and which supports from the mandrel's (30) one distal end (34). Mandrel (30) has a restricted freedom of movement along the extension route. A distance adjustment unit (20) is provided as giving motion to the mandrel (30) in extension direction as neighbour to the second support (40) close to the support edge (52) of tray (50). Distance adjustment unit (20) comprises a bearing (22) stroking mandrel's (30) extension axis and an adjustment member (26) is fixed in side part of this. A front holding element (21) clutches mandrel (30) from its proximal end (34). In this way, when bearing (22) goes forward it moves the mandrel (30) together with it on tray (50) on hanging first support (10) and second support (40). The motion as in the widened view is provided by a holding arm (23) that is side fixed to bearing (22) with a body (27) and that moving inside a housing (25) looking to support edge (52) and which is attached to the support edge (52) from its external end. Holding arm (23) extends parallel to bearing (22) stroke axis. Holding arm (23) is associated as provided the stroke distance (x) measurement by a display (24) attached over housing (25) and having a screen looking upwards. When the adjustment member (26) which is mounted to side body (27) as rotatably turned in the rotation of direction (r) by a gear pair (not shown) it turns the rotation motion to stroke motion of holding arm (23). When adjustment member (26) is rotated holding arm (23) removes the bearing (22), to which it is fixed, as axially from the tray (50) by applying compression force to the support edge (52) , which it supports. In this way front holding element (21) pulls the proximal end (34) towards the tray (50) by pulling mandrel (30) over the tray. This motion provides positioning the shape form giving end of mandrel (30) to a location determined before during pipe production. With rotating the adjustment member (26) in opposite direction holding arm (23) brings closer the bearing (22) as axially to the tray (50) by applying pull force to the support edge (52),caught by it. In this situation, mandrel (30) is moved from the opposite edge (54) towards the outside. This motion provides positioning the shape form giving end of mandrel (30) to a location determined before during pipe production.

[0016] The display (24) comprises a digital monitor (241) which from outside accessible as visual, looking to the upwards. The screen which is produced with LCD or similar technology, allows to read the stroke distance (x) of holding arm (23) according to a reference point as milimeter or cantimeter type. Thus, it is provided that the mandrel (30) that is put over the metal sheet strip got in pipe forming region (1), took in suitray position to the pipe production that the diameter determined before. Stroke distance (x) being stroke that is obtained by turning the radial motion provided by adjustment member (26) into lineer motion over holding arm (23), is turned into readable numbers readable by display (24). It can be provided that the display (24) reads the stroke distance (x) directly with measuring of motion quantity of holding arm (23), it can also be provided that from a value adjusted before corresponding to rotation angle of adjustment member (26) radial motion.

[0017] Stroke value by display (24) can be measured by a known as measuring distance measuring platform, for example with micrometer. Further it is clear that for torque value measurement by display (24), a load cell inside a housing (25) can be used.

REFERENCE SIGNS LIST

[0018] 1. Pipe forming region

[0019] 10. First support

[0020] 12. Front bearing

[0021] 14. Front roll

[0022] 20. Distance adjustment unit

[0023] 21. Front holding element

[0024] 22. Bearing

[0025] 23. Holding arm

[0026] 24. Display

[0027] 241. Digital monitor

[0028] 25. Housing

[0029] 26. Adjustment member

[0030] 27 Body

[0031] 30. Mandrel

[0032] 32. Proximal end

[0033] 34. Distal end

[0034] 40. Second support

[0035] 42. Rear bearing

[0036] 44. Rear roll

[0037] 50. Tray

[0038] 52. Support edge

[0039] 54. Opposite edge

[0040] x. Stroke distance

[0041] r. Rotation direction