Pipe bending machine with rear calender and its respective calendering procedure

Abstract

A machine to bend pipes that includes: a plate that is configured and arranged to move along an X-axis; a bending head connected to the plate, where the bending head is capable of moving along a Z-axis and is equipped with at least one bending arm and at least one bending die; and at least one calendering jig, which is located at a position that is before the bending die, with respect to a feeding direction of the pipe. The calendering jig includes at least two first rolls used to lock the pipe and at least one second roll that is configured and arranged for determining the calendering radius of the pipe, wherein the at least one second roll is anchored to the plate. The bending head is configured and arranged to move in the Z direction with respect to both the plate and the second roll.

Claims

1. A machine to bend pipes comprising: a bed; a plate, positioned at one end of said bed, said plate being configured and arranged to move along an X-axis that is parallel to a surface on which the bed is located; a bending head connected to the plate, said bending head being configured and arranged to move along a Z-axis that is orthogonal to the surface on which the bed is located, said bending head being equipped with at least one bending arm and at least one bending die; and at least one calendering jig; and wherein said calendering jig is located at a position that is before the bending die, with respect to a feeding direction of the pipe, wherein the calendering jig comprises at least two first rolls used to lock the pipe, wherein the two first rolls are opposed to each other and positioned at the end of the bed, and a second roll that is configured and arranged for determining the calendering radius of the pipe, wherein said second roll is anchored to the upper portion of the plate, and wherein said bending head is configured and arranged to move-independently in the Z direction with respect to both said plate and said second roll.

2. A machine to bend pipes and the like according to claim 1, wherein the calendering jig comprises at least one device configured and arranged for supporting the pipe and configured and arranged for generating and controlling a winding pitch of the pipe, wherein said device is anchored to the bending head.

3. A procedure to calender pipe by using a machine to bend the pipe, wherein the machine comprises: a bed; a plate, positioned at one end of said bed, said plate being configured and arranged to move along an X-axis that is parallel to a surface on which the bed is located; a bending head connected to the plate, said bending head being capable of moving along a Z-axis that is orthogonal to the surface on which the bed is located, said bending head being equipped with at least one bending arm and at least one bending die; and at least one calendering jig; and wherein said calendering jig is located at a position that is before the bending die, with respect to a feeding direction of the pipe, wherein the calendering jig comprises at least two first rolls used to lock the pipe, wherein the two first rolls are opposed to each other and positioned at the end of the bed, and a second roll that is configured and arranged for determining the calendering radius of the pipe, wherein said second roll is anchored to the upper portion of the plate, and wherein said bending head is configured and arranged to move independently in the Z direction with respect to both said plate and said second roll, the procedure comprising the following steps: a first step, in which a portion of the pipe to be calendered is positioned in correspondence with the first rolls; a second step, in which the portion is locked by the first rolls; a third step, in which the plate is moved along the X-axis, so as to position the second roll in such a position as to determine the calendering radius according to an operating process set by an operator; a fourth step, in which the portion is fed towards and beyond the second roll, and a fifth step of moving the bending head, which includes a device anchored thereto, which is configured and arranged for supporting the pipe, along the Z-axis, thereby supporting the pipe and controlling the winding pitch of the pipe.

4. The procedure to calender the pipe according to claim 3, wherein, during the fourth step, the second roll modifies its position by varying the calendering radius of the pipe.

5. The procedure to calender the pipe according to claim 4, wherein the fourth step also comprises rotation of the pipe according to the operating process set by the operator.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

(1) FIG. 1 shows a perspective view of the machine used to bend pipes and the like according to the present invention.

(2) FIG. 2 shows a perspective view of the calendering jig.

(3) FIG. 3 shows a perspective view of the machine according to this invention, with a special emphasis dedicated to the calendering jig to support, generate, and control the pipe's winding pitch.

DETAILED DESCRIPTION OF THE INVENTION

(4) FIG. 1 shows a perspective view of the machine to bend pipes and the like comprising a bed (1) having, at one of its ends (2), a plate (3) capable of moving along the X-axis parallel to the table on which the bed (1) is located, a bending head (4) connected to the plate (3), said bending head (4) being capable of moving along the Z-axis orthogonal to the table on which the bed (1) is located, equipped with a bending arm (5), a bending die (6), a calendering jig (7), and means, not shown in the figures, to feed the pipe (9). The calendering jig (7) has a position (P) located before the bending die (6) as moving in the feeding direction (D) of the pipe (9).

(5) FIG. 2 shows a perspective view of the calendering jig (7), comprising at least two first rolls (10.sup.1 and 10.sup.2) used to lock the pipe (9), opposed to each other and lying at the end (2) of the bed (1), a second roll (11) determining the calendering radius of the pipe (9), anchored to the upper portion of said plate (3).

(6) FIG. 3 shows a perspective view of the calendering jig (7) comprising a device (12) suitable for supporting the pipe (9) and also suitable for generating and controlling the winding pitch of the pipe (9), said device (12) being anchored to the bending head (4).