JP4709300B2 - Tube brim forming machine - Google Patents

Description

  The present invention relates to a processing machine for expanding and forming a flange portion at an end portion of a metal pipe material such as a steel pipe or a SUS pipe.

In the technical field of piping, a flared tube that has been subjected to so-called flaring, in which a flange portion that is expanded by bending an end portion of a pipe material outward is employed.
As a flare processing machine, a conical primary roller is known that bends the end of a pipe to about 40 to 50 °, and then bends outward to about 90 ° with a secondary roller to expand (patent) Reference 1).
However, the gradual flare processing machine using the primary roller and the secondary roller has a complicated structure and is expensive.

JP 2004-82184 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a tube forming machine for a tube material that can be expanded and bent outward by 90 ° with only a primary roller.

The tube flange forming machine according to the present invention is a processing machine for forming a flange portion at the end of the tube, and a substantially conical roller that rotates and revolves while sliding on the side surface while pressing against the end of the tube. has a roller support portion that supports freely rotating the roller, the roller support portion, Yes coupled between the roller supporting member disposed on both sides, the two sides of the roller support member, the front-rear direction movement control and the rotation It is connected to a U-shaped rotating bracket that is controlled and opened in the front, and is pivotally connected to each other by a rotating shaft in the front-rear direction. The rear end of the arm is supported so as to be slidable in the front-rear direction with respect to the rotating bracket, and the pivot shaft is lower than the front end shaft-attached portion that is attached to the front end of the arm and is shifted forward . In position Moving said while rotating the rotation bracket roller support portion is rotated and inclined by the forward movement control of the arm movement control shaft coupled to the rear end of the arm, to tubing side of the pivot axis or shaft attachment portion flange portion As a result, the arm movement control shaft moves forward so that the roller tilts and rotates in the direction of expanding the diameter of the end of the tube while moving the sliding contact portion with the inner surface of the tube in the width direction of the collar . And a control means for controlling the rotation of the rotary bracket and a forward / backward movement control means .

The present invention is different from the conventional one in that the flare is formed only by the primary roller by rotating the conical roller in the front-rear direction until the bending angle of the collar portion to be ejected becomes 0 to 90 ° while the roller rotates and revolves. It has been processed.
In this case, the sliding contact portion on the side surface of the roller gradually moves toward the base side of the roller according to the bending angle of the collar portion.
Therefore, the tip of the arm is pivotally attached to the roller support member, and the rear end of the arm is slidably supported by a rotation bracket that is controlled to move back and forth and rotate, and the roller support member is attached to the rotation bracket. It is preferable that the tip end shaft attachment portion of the arm is connected to the upper side or the lower side by a rotating shaft whose position is shifted in the front-rear direction.

  Here, the rear end of the arm is connected to an arm movement control shaft having a male screw portion, and the rotating bracket is connected to a rotation-controlled bracket rotating member screwed to the male screw portion. Since the flare can be done simply by rotating it with a drive motor, the mechanical structure becomes extremely simple.

  Further, when the forward / backward movement control of the rotary bracket and the forward / backward movement control of the rear end of the arm are controlled independently or in conjunction with each other, the forward / backward movement of the rotary bracket and the rotation control of the roller in the front / rear direction are independent. The roller bracket can be controlled to move in a direction that slightly retracts the rotating bracket in accordance with the movement of the roller support member in the standing direction, and the conical roller is slidably contacted with the end of the tube. Can be controlled to be inclined and rotated in the direction of expanding the end while gradually moving toward the base side of the roller, and the set-up work associated with the replacement of the pipe can be performed quickly.

In the tube flange forming machine according to the present invention, it is necessary to separate and form the rib by dividing it into two stages of a primary roller and a secondary roller. Bending up to 90 ° is possible, and a processing machine with a simple structure and high productivity has been realized.
Also, since the sliding contact part on the side of the roller moves to the base side of the roller according to the bending angle of the collar part, it can be used for materials that were conventionally said to be difficult to blow out like SUS pipes. it can.

The whole block diagram of the processing machine which concerns on this invention is shown. The flow of tapping is shown. The figure explaining movement of an arm is shown. The movement of the roller during the tapping process is shown. The example of the processing machine which concerns on another Example is shown. An explanatory view of movement of a roller is shown. An example in which the roller is rotated in the front-rear direction by retracting the arm is shown.

FIG. 1 shows an overall view of a brim forming machine according to the present invention, and FIGS. 2 to 4 show the flow of rib forming.
A support frame 61 that supports the drive motor 40 and the bracket rotating member 11 is erected from the base frame 60.
A drive gear 41 connected to the main shaft of the drive motor 40 meshes with the bracket rotation gear 43 via a transmission gear 42 as necessary.
The rotation of the bracket rotation member 11 is controlled by the rotation of the bracket rotation gear 43.
Inside the bracket rotating member 11, a bracket movement control shaft 11a that is splined is provided.
Inside the bracket movement control shaft 11a, an arm movement control shaft 21 is provided for movement control in the front-rear direction.
The bracket movement control shaft 11a is rotatably connected to a piston rod 14a provided in the secondary cylinder 14, and the rotary bracket 10 advances by the advancement of the piston rod 14a.
The piston rod 12 a is connected by a connecting member 51 via bearings 52 and 53 provided in the housing 50, and moves forward and backward by the primary cylinder 12.
Further, the rotation of the drive motor 40 causes the bracket rotation member 11 connected to the bracket rotation gear 43 to rotate, and the rotation bracket 10 rotates.
The primary cylinder and the secondary cylinder are not double-acting as in this embodiment, and each may be controlled by a single cylinder.

FIG. 3 shows an enlarged view of a portion of the rotating bracket 10, and FIG.
For the arm movement control, the front end of the shaft 21 is connected to the rear end of the arm 20 which is curved in a substantially arch shape in a side view via an arm support shaft 22 in the left-right direction.
The arm support shaft is movable in the front-rear direction along a front-rear direction guide portion (guide long hole) 13 provided in the rotary bracket 10.
On the other hand, the distal end portion of the arm 20 is rotatably mounted on the shaft mounting portion 24 via brackets 32a provided on the left and right sides of the roller support member 32.
A conical roller 30 is attached to a roller support portion 31 provided so as to connect the brackets 32a on both sides so as to rotate freely.
The bracket 32a is pivotally mounted on a rotating shaft 33 provided with a position shifted downward and forward from a shaft mounting portion 24 on which the tip of the arm 20 is mounted.
As a result, when the arm movement control shaft 21 moves forward and the rear end of the arm 20 moves forward as shown by the arrow S ₂ , the shaft mounting portion 24 moves forward while drawing an arc, and the bracket 32 a moves the rotating shaft 33. It turns forward with the center of rotation.
At this time, since the roller has a conical shape, the revolving control of the rotation shaft 33 is performed in accordance with the rising angle of the roller shaft.
As a result, the conical roller 30 rotates toward the outside while the side surface sliding portion of the roller 30 moves toward the base side of the roller 30 as shown in FIGS.
Therefore, the roller 30 revolves by the rotation of the rotary bracket 10 and can be continuously bent from 0 ° to 90 ° by rotating outwardly while rotating.

  FIG. 5 shows an example in which the bracket rotating member 11 and the arm movement control shaft 21 are connected by a ball screw, and the rotating bracket 10 and the arm 20 are controlled to advance and retreat only by the rotation of the drive motor 40 without the rotating bracket 10 being moved forward and backward by the piston. Indicates.

FIG. 6 shows an example in which the rotation shaft 33a of the roller support member 32 is axially attached to the long hole 33b in the front-rear direction while being urged forward by a spring 34.
If it does in this way, when the roller 30 rotates in the standing direction, the rotating shaft 33a moves backward against the spring elastic force, so that the roller 30 rotates while applying a predetermined pressing force to the collar portion side.

FIG. 7 shows an example in which the side sliding contact portion of the roller is inclined outward while moving toward the root side of the roller with respect to the inner side of the tube material as the arm moves backward.
Contrary to the embodiment of FIGS. 1 to 4, the tip end shaft attachment portion 124 of the arm 120 is provided below the roller front-rear direction rotation shaft 133 and shifted in front.
In this manner, when the rear end of the arm 120 is pulled rearward, the roller 30 attached to the rear of the rotating shaft 133 rotates in a standing direction while drawing an arc as shown in FIG. At this time, by taking the conical side surface angle of the roller into consideration, the rotation shaft 133 is controlled to retreat, so that the inner sliding contact portion of the pipe gradually moves toward the base side of the roller, and is swung out by rotation and revolution.

DESCRIPTION OF SYMBOLS 1 Pipe material 1a Collar part 10 Rotation bracket 11 Bracket rotation member 11a Bracket movement control shaft 12 Primary cylinder 12a Piston rod 13 Guide part 14 Secondary cylinder 14a Piston rod 20 Arm 21 Arm movement control shaft 22 Arm support shaft 24 Axis attachment part 30 Roller 31 Roller support portion 32 Roller support member 33 Rotating shaft 40 Drive motor 41 Drive gear 42 Transmission gear 43 Bracket rotation gear 50 Housing

Claims (1)

A processing machine for forming a flange portion at an end portion of a pipe material,
A substantially conical roller that rotates and revolves while sliding on the side surface while pressing against the end of the tube;
It has a roller support part that supports the roller in a freely rotating manner,
The roller support part is connected between roller support members arranged on both sides,
The roller support members on both sides are connected to a U-shaped rotary bracket whose front and rear direction movement control and rotation control are open, and are connected to each other by a rotation shaft so as to be rotatable in the front and rear directions. The tip of a generally arcuate arm is pivotally attached,
The rear end of the arm is supported to be slidable in the front-rear direction with respect to the rotating bracket,
The pivot shaft is at a position shifted from the front and the front end shaft attachment portion on which the front end of the arm is attached, and shifted forward ,
The roller support part rotates and tilts by the forward movement control of the arm movement control shaft that connects the rear end of the arm while rotating the rotating bracket, and the rotating shaft or the pivoting part moves to the pipe material side from the collar part. As a result, the arm movement control shaft moves forward so that the roller tilts and rotates in the direction of expanding the diameter of the end of the tube while moving the sliding contact portion with the inner surface of the tube in the width direction of the collar . And a tube flange forming machine characterized by having a control means for controlling the rotation of the rotating bracket and a means for controlling the movement in the front-rear direction separately .

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