JPS6231234Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tube processing device that stabilizes the position of a tube while imparting rotational motion to the tube during tube processing. A known pipe processing device is one in which a pair of supporting rolls are arranged along the pipe axis, the pipe is placed on top of the rolls, the pipe is rotated, and the pipe is transported in the axial direction to process the pipe. ing. In order to rotate and transport the tube with such a device, it is necessary to tilt the axis of the roll facing the tube axis. The tube is rotated by the tilted rolls and transported in the direction of the tube axis, but since the tube is supported by each pair of rolls tilted in the same direction, it is unstable, so the rotating tube is The tube axis tends to constantly swing from side to side, and this tendency is particularly noticeable at the ends of the tube. Furthermore, if the outer diameter of the tube varies and fluctuates, or if the tube is deformed even slightly in the axial direction, instability will be further exacerbated and the tube will shake, resulting in the center of rotation at the end of the tube becoming unstable. The problem is that the process is not fixed at a fixed point, resulting in extremely poor workability and poor machining accuracy. In order to solve this problem, it is possible to prevent the tube axis from tilting by installing presser rolls on the top surface of the tube, but as the tube becomes longer, the number of presser rolls must be increased to stabilize the tube. First, the rotational power of the roll is required in excess of the pressing force of the presser roll. There is also the inconvenience that the vertical position and pressing force of the presser roll must be adjusted every time the pipe diameter changes.

The present invention solves the above-mentioned conventional drawbacks, rotates and transfers the tube with less power without requiring presser rolls, and allows the rotation axis at the end of the tube to be maintained without shaking even if there are slight variations in the outer diameter of the tube. It is an object of the present invention to provide a pipe machining device that can be fixed at a fixed position and obtain high machining accuracy.

Next, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a device for chamfering the outer periphery of one end of a hard vinyl chloride pipe, where A is a pipe end processing device consisting of a chamfering blade 5, its drive device 6 and a stopper 8, and B
is a tube support device provided in front of the processing device A.

The tube support device B is provided with a pair of guide rolls 1 and 2 whose surfaces are made of rubber and which are inclined in the direction away from the processing device A, and a pair of propulsion rolls 3 and 4 whose surfaces are also made of rubber, in this order. ing. The guide rolls 1 and 2 are supported by bearings 9 such that the distance between them at one end approaching the processing device A is narrower than the distance between the other ends. The axes of the pair of propelling rolls 3 and 4 are both supported by bearings so as to be substantially parallel to the axis of one of the guide rolls 1. One of the propulsion rolls 3 is connected to a drive device (not shown) so as to rotate in the direction of arrow a. By changing the inclination of the axis of the propulsion roll 3, the tube propulsion speed can be changed. That is, when the inclination of the axis of the propulsion roll 3 is increased, the tube propulsion speed increases. However, if the inclination of the axis of the propulsion roll 3 becomes excessive, the tube tends to become unstable. If the pipe is long, a pipe support device B' may be used in which guide rolls 1, 2 and propulsion rolls 3, 4 are alternately arranged as shown in FIG.

Next, the operation of the illustrated device of the present invention will be described.
When the tube 7 is placed on the four rolls 1, 2, 3, and 4 and the propulsion roll 3 is rotated in the direction of the arrow a, the tube 7 rotates in the opposite direction of the arrow b, supporting the tube 7. The other guide rolls 1 and 2 and the propulsion roll also rotate in the same direction as the propulsion roll 3, in the direction of arrow a, due to friction with the tube 7. While rotating, the tube moves forward toward the tube end processing device A, and the tube end comes into contact with the stopper 8, at which point the rotary blade 5 rotates in the same direction as the tube 7.
chamfered by While being chamfered, the tube 7 receives a propulsive force directed toward the processing device A by the propelling roll 3, so that it maintains the state of being processed in contact with the rotary blade 5 and does not retreat and separate from the rotary blade 5.

In the present invention, instead of tilting all of the guide rolls and propulsion rolls of the tube support device in the same direction, one roll of the guide rolls near the tube end processing device is tilted in a direction different from that of the other rolls. Because the tube is tilted in the same direction, even if there are variations in the outer diameter dimension or slight deformation in the axial direction, the tube is supported by each roll in a stable state, especially at the tube end near the tube end processing device. In this process, the position of the axis of the tube is fixed at a constant position and does not oscillate, making it possible to obtain excellent machining accuracy. In addition, as shown in Figure 4, by combining multiple sets of guide rolls and propelling rolls, long pipes can be processed in the same way, and since no presser rolls are required, the pipes are not pressed from above by the presser rolls. The drive roll can be rotated with less power. In addition to the illustrated tube end chamfering process, the device of the present invention can also be used for tube end processes such as tube end polishing and tube end cutting.

[Brief explanation of the drawing]

Figure 1 is a plan view showing one embodiment of the present invention;
3 is a side view taken along the line of FIG. 1, and FIG. 4 is a plan view showing another embodiment of the present invention. A... Pipe end processing device, B... Pipe support device, 1,
2...Guide roll, 3, 4...Propulsion roll, 7...
…tube.

Claims (1)

[Scope of utility model registration request] It consists of a tube end processing device and a tube support device, and the tube support device is provided in this order with a guide roll and a propulsion roll consisting of two rolls arranged on both sides of the tube end processing device in the direction away from the tube end processing device. , the guide roll and the propulsion roll are each provided to be inclined from the above direction, one roll of the guide roll is inclined in a different direction from the other roll of the guide roll and the propulsion roll, and at least one of the rolls of the propulsion roll is Pipe processing equipment designed to be driven and rotated.