JPS5927260B2 - Helical coil manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a helical coil manufacturing apparatus for manufacturing straight tubes or rods in a spiral shape with high precision, such as a helical coil heat transfer tube made by spirally bending a tube for a heat exchanger.

A helical coil heat transfer tube made by spirally bending a tube material is used in a steam generator for a fast breeder reactor, and requires high precision in the pitch or diameter of the coil.

In such heat exchanger tubes, dozens of heat exchanger tubes are arranged in several layers at equal intervals, so that the heat exchanger tubes may come into contact with each other due to internal vibration of the heat exchanger tubes, or conduction may occur due to mutual interference due to thermal expansion. There is a high risk that the impact will be transmitted to the heat tube and cause cracks in the tube, and precision is required to prevent this. However, conventionally, there is no device that can provide sufficient accuracy to the coil pitch and diameter of the helical coil, making the supporting structure of the helical coil complicated and making assembly work difficult. The purpose of the present invention is to accurately manufacture helical coils such as helical coil heat transfer tubes used in heat exchange evaporators, superheaters, reheaters, etc. A bending roller consisting of at least three rollers for bending the coil material into an annular shape is attached to the main body of the apparatus so that one of the rollers is located on the inner diameter side of the annular shape, and two rollers are located on the outer diameter side of the annular shape, and the coil material to be processed is bent toward the bending roller. a pitch roller that is attached to the main body so as to be adjustable and movable up and down so as to change the angle of entry of the coil material to be processed into the bending roller, and to give a pitch to the coil material after passing through the bending roller; A diameter pitch calibration roller for adjusting the radius and pitch of the coil material to be processed after passing through the pitch roller is attached to the apparatus main body, and a support roller for horizontally supporting the coil to be processed that is bent into a helical coil. This helical coil manufacturing device is installed between a support provided in front of the device main body and the device main body.

Next, the manufacturing device of the present invention will be explained based on the drawings.The device main body 1 has three main shafts 2, 3,
4 are attached, and bending rollers 5, 6, 7 are attached to the respective main shafts 2, 3, 4.

The straight coil material 8 to be processed is bent into an annular shape with a constant radius by these bending rollers 5, 6, and 7, but as shown in FIG. One bending roller 5 is located, the other two 6, 7
is located on the outer diameter side, and the coil material 8 to be processed is bent to a constant radius of curvature set between the bending rollers 5 and 6, 7. In order to adjust the bending roller 5 by moving it up and down to match the diameter of the coil material to be processed, the bending roller 5 is movable up and down, and a handle 9 is used to move it up and down.
is installed. Furthermore, at least one of the two bending rollers 6 and 7 may be made to be movable left and right, so that the diameter of the coil material to be processed by the three bending rollers can be arbitrarily selected. Note that 10 indicates a gauge for the bending roller. A support 11 is attached to the main body 1 of the device, and two insertion rollers 1 on the upper and lower sides are attached to this support 11.
2 and 13 are attached at a certain distance from each other.

The lower insertion roller 13 inserts the coil material 8 to be processed toward the bending rolls 5, 6, and 7 as shown in FIG. In order to make adjustments when the angle θ is different, the handle 14 is configured to be movable up and down. Incidentally, depending on the pipe diameter, the mounting height of the upper insertion roller 12 may be adjusted, so this may also be made to be movable up and down. Pitch rollers 15 are mounted perpendicularly to the main shafts 2, 3, 4 to give a pitch to the applied eco-inole material 8 which has been annularly bent to a constant coil diameter by the bending rollers 5, 6, 7. There is. In order to improve the accuracy of the pitch roller 15,
A fine adjustment screw 16 is attached to the bracket supporting the pitch roller 15 in order to adjust and move the pitch roller 15 in the left and right directions in FIG.
is installed. Two dial gauges 17 are arranged in the main body 1 of the apparatus to measure the accuracy of the mounting position of the pitch roller 15. A diameter calibration roller 19 is fixed to the tip of a link mechanism 18 attached to the apparatus main body 1, and the link mechanism 18 adjusts the position of the diameter calibration roller 19 to adjust the coil to be processed to a desired diameter.

Further, in order to adjust the diameter and pitch of the coil to be processed, a diameter pitch calibration roller 20 is attached to a column 21 fixed to the upper part of the apparatus main body 1. As shown in FIGS. 1 and 2 and an enlarged view of FIG. The pitch of the processed coil is determined by the sleeves 26 and 2 that fix the side rollers 23 and 24.
This is corrected by moving one 26 of 7 with a bolt 28. The diameter pitch calibration roller 20 is vertically adjusted by making the shaft 25 vertically movable relative to the support column 21, thereby adjusting the diameter of the coil to be processed. 2
9 is a handle for vertically moving the shaft, and 30 is a gauge for displaying the vertical position of the shaft 25.

A crosshead 32 is attached to a column 37 installed in front of the main body 1 of the apparatus as shown in FIG.
A coil receiving roller 34 is attached to an arm 33 fixed to the crosshead 32 for holding a helical coil bent to a constant diameter and pitch without resistance.

The center of this coil receiving roller 34 is the center of the shaft 25,
That is, in order to match the center of the inner diameter roller 27, the crosshead 32 is adjusted and moved up and down by the drive wire 35. Although a part of the coil receiving roller 34 is omitted in FIG. 1, it is designed so that the coil receiving roller 34 can support one helical coil that has been bent into a coil shape using ten coil materials to be processed. Use one with sufficient length. Similarly, the support column 31 and the device main body 1 are actually much further apart than in the case shown in FIG. Therefore, when a piece of material is processed into a coil shape, it is supported by the coil receiving roller 34, but in order to remove it, the arm 33 is moved to the support post 3.
Alternatively, the crosshead 32 may be moved upward and then removed. To manufacture a single helical coil using a single straight coil material, as shown in FIG. 6 and 7, and bend it to a constant radius.

After passing through the bending rollers 5, 6, and 7, the material is bent to the left in FIG. 2 by a pitch roller 15 to give a constant pitch. The diameter of the pitched material is corrected by a diameter calibration roller 19, and the diameter and pitch are further corrected by a diameter pitch calibration roller 20. The helical coil processed into a spiral shape by being fed out by the rollers is supported by the coil receiving rollers 34. As described above, in the present invention, the pitch and diameter of the helical coil are continuously calibrated in three dimensions from the insertion of the material to the completion of manufacturing, and a helical coil with high processing accuracy is manufactured.

[Brief explanation of drawings]

Claims (1)

[Claims] 1 Attach a bending roller consisting of at least three rollers for bending a straight coil material to be processed into an annular shape with a constant radius to the apparatus main body so that one of them is located on the inner diameter side of the annular shape and two are located on the outer diameter side of the annular shape, and An insertion roller that guides the coil material to be processed toward the bending roller is attached to the main body so as to be adjustable and movable up and down so that the angle of entry of the coil material to be processed into the bending roller changes, and after passing the bending roller. A pitch roller that gives a pitch to the coil material to be processed and a diameter pitch calibration roller that adjusts the radius and pitch of the coil material to be processed after passing through the pitch roller are respectively attached to the device main body, and the coil material is further bent into a helical shape. A helical coil manufacturing device comprising a support roller that horizontally supports a coil to be processed and is attached between a support provided in front of the device main body and the device main body.