JPS5849147Y2 - A device that rolls and forms fins on the outer periphery of a tube body. - Google Patents

Description

[Detailed Description of the Invention] The present invention is an apparatus for forming fins on the outer surface of a tube body, and the present invention is a device for forming fins on the outer surface of a tube body. This invention relates to a rolling forming part main body that can be used in common by one adjustable rolling forming part main body without the need to replace it, and also facilitating the adjustment operation and improving accuracy.

For forming spiral fins on the outer circumference of the tube
[This is a development of the conventional rolling equipment technology for screws and bolts, in which an arbor with multiple disc-shaped rolls is installed approximately parallel to the axial direction of the pipe to surround the pipe, and the rolls are rolled. By pressing against the outer circumference of the tube while rotating, the fins are extruded from the outer circumferential surface of the tube in the radial direction of the outer circumference. At this time, the rolling roll is assembled with a 3-axis arbor, and because of the spiral fin, the fins are It is placed at a slight angle to the tube axis.

The disadvantage of this conventional type is that the body of the rolling part must be replaced every time the outer diameter of the tube, the number of spiral fins, and the pitch of the fins change. This is the point where it becomes necessary to prepare.

In order to solve this drawback, three bores are formed at equal intervals in the housing that surrounds the tube axis in a direction perpendicular to the tube axis, and a cylinder block is installed in which a rolling shaft is rotatably held within these bores. An improved model has been developed that incorporates a lead angle adjustment arm at the rear of the cylinder block, and can be variably adjusted according to the outer diameter of the tube and the number of spiral fins. , because it uses three hydraulic cylinder blocks separated in three locations in the circumferential direction, variable adjustment requires a small operating stroke due to the direct movement of the cylinders, requiring high-pressure drive, and synchronization of the cylinders in each cylinder block. However, it is difficult to operate, the operation is complicated, and there are problems with fine inflection.

The present invention solves these problems by combining a plurality of rolling forming tools in an adjustable manner, and allows for simple, easy and accurate adjustment using a single control means. , Three arbors with forming tools attached to the outer periphery are arranged evenly around the circumference within the frame so as to form a predetermined lead angle in the longitudinal direction, and fins are rolled on the outer periphery of the tubular body using the three forming tools. an arbor housing that rotatably supports the arbor inside the arbor;
A lead angle adjustment pin attached to the end of the arbor housing, a tool opening/closing block provided on the outside of the arbor housing, and a radial direction rotatably supporting the arbor housing with respect to the tool opening/closing block. Consisting of a pin and a screw shaft protruding in the radial direction attached to the outside of the tool opening/closing block, three molded tool units are spaced evenly around the circumference within the frame and are each screwed onto the outer periphery of the screw shaft. Three small bevel gears rotatably attached to the frame, a large bevel gear rotatably attached to the outer periphery of the frame and screwed into the group of small bevel gears, and a drive mechanism that selectively transmits rotational drive to the dog bevel gears. and a lead angle adjustment wheel rotatably attached to the outer periphery of the end of the frame, each of which is attached to three side surfaces of the wheel and whose tips are connected to the lead angle adjustment pins via spherical bearings. and a coupling mechanism that transmits rotation of the wheel to the arbor housing.

The present invention will be described in detail below based on the illustrated embodiments. Fig. 1 is a longitudinal sectional side view of the main part of an embodiment of the forming tool unit according to the present invention, Fig. 2 is a plan view of the entire device, and Fig. Figure 3 is an exploded perspective view of the main parts of the device.
1 is a raw material tube, and the tube 1 enters from the left side in the figure and is rotationally driven by forming tools 2 arranged at three locations on the outer circumference of the tube 1, and the tool 2 and the tube Rolling is performed between internal tools 7 located within the body 1 to form the fins.

At this time, the center axis B of the forming tool 2 is at a predetermined angle (lead angle) with respect to the center line A of the tube body 1 when viewed from a direction perpendicular to the plane of the paper.
As a result, a spiral fin 1a commensurate with the lead angle is formed on the outer circumferential surface of the tube body 1.

Although FIG. 1 shows the structure of only one of the three forming tools 2, this is exactly the same for the other two forming tools. To describe the forming tool unit IIc of the present invention, which has the tool 2 at its core, the forming tool 2 is supported rotatably via an arbor housing 13vc bearing 29, and a collar 26 of the arbor 3.
The flange 26 and the cap 2
Arbor 3
The molding tool 2 is fixedly fixed to the molding tool 2, and molding tools 2 of various sizes can be replaced and removed depending on the purpose.

A bearing box 28 is provided with a bearing 30 for rotatably supporting the cap 23. This bearing box 28 is attached and supported by a tool opening/closing block 11, which will be described later. A key fitting part 6 is externally fitted to the tip part, and the rotation of the arbor 3 is caused by a rotation of the arbor 3 from an appropriate drive device (not shown) to the rotating shaft 31°, the universal joint 4, and the key fitting part. 5 to the arbor 3, and the three forming tools 2 are rotated in the same direction even when they are tilted.

The arbor 3 is rotatably supported by a bearing 29 with respect to the arbor housing 13 as shown in the third diagram, and is also supported by the collar portion 26 and the key fitting portion 5 so as not to move back and forth with respect to the housing 13. It is restrained by a nut 25 that is screwed into the threaded portion 3a following the threaded portion 3a.

This arbor housing 13 has a radius attached to a tool opening/closing block 11 which is mounted and supported on a frame 8 as shown in the third diagram through a slide guide portion 2T so as to be movable forward and backward toward the center of the tube body 1 mentioned above. It is rotatably supported by the direction pin 12 via a bearing 32 with the pin 12 as a fulcrum, and a lead angle adjustment pin 14 protrudes from the rear end of the housing 13 opposite to the side supported by the pin 12. will be established.

A screw shaft 10 is projected from the upper surface of the tool opening/closing block 11, and the screw shaft 10 has a small bevel gear 9 rotatably mounted on the frame 8 via a bearing 33 at a position corresponding to the screw shaft 10. The tool opening/closing block 11 is moved up and down through the forward and reverse rotation of the gear 9, and the arbor housing 13 is moved along with the tool opening/closing block 11 to move the forming tool 2 against the outer peripheral surface of the tubular body 1. It is designed to be able to be moved in and out.

At this time, the forming tool unit constituted by the Bouber 3 forming tool 2 arbor housing 13 and the tool opening/closing block 11 is arranged on the circumferential side of the frame 30 evenly spaced around the circumference of the tube body 1, as is clear from FIG. Three small bevel gears 9 are provided, and three small bevel gears 9 are also provided.

In order to operate these three small bevel gears 9 at the same time,
One large bevel gear 22 is rotatably provided on the frame 8 via a bearing 34 and meshes with each small bevel gear 9.
The following drive mechanism is associated with the large bevel gear 9.

That is, the internal gear part 21a of the clutch 21 is commonly connected to the spur gear part 20a of the rotary disk 20, which is rotatably provided on the frame 8 via a bearing 35 in parallel with the spur gear part 22a of the large bevel gear 22. , and by making the clutch 21 slidable, both the spur gear parts 22a and 20a can be switched toward and away from each other, and the rod of the driving cylinder 36 is attached to one end of the arm 20b protruding from one side of the rotating disk 20. 36a is pivotally connected, the clutch 21 is turned on, the drive cylinder 36 is operated, and the rod 36a arm 20
The large bevel gear 22 is rotated via the b disc 20, and each small bevel gear 9 is rotated synchronously in the same direction.

Further, a worm wheel 18 that meshes with a worm 17 rotatably mounted via the frame 8 is attached to the lead angle adjustment pin 14 attached to the rear end of the arbor housing 13, and is attached to the frame 8 along with the rotary disk 20. Bearing 37 on top
A guide 16 is protruded from three locations on the circumferential side of the wheel 180, and a continuous stroke 1 inserted and supported by the guide 16 is provided rotatably through the wheel 180.
The pin 14 is inserted into the 50 spherical bearing 15a, and by rotating the worm 17 with the bundle 19, the arbor housing 13 is inserted into the pin 12 through the rotation of the worm wheel 180 and the connecting rod 15 of the guide 16. By rotating the tool unit as a fulcrum, the arbor 3 in the three tool units is tilted with respect to the tube body 1, and the desired lead angle adjustment is performed.
In addition, in FIG. 3, 38 is the arm 20 of the rotating disk 20.
The stopper 39 provided aK is a stroke adjustment bolt adjustable on the frame 8 side, and is used to regulate the amount of rotation of the rotating disk 200.
is a base for fixing the frame 8.

According to the fin rolling forming apparatus of the present invention, the tube body 1 which is the raw material
Using a frame 8 surrounding the outer periphery of the molding tool unit, three molding tool units are arranged at equal intervals around the circumference, and rotate the rotary disk 20 via the arm 20a through the advancement and retreat of the rod 36a driven by the drive cylinder 36. the spur gear part 20a of the clutch 21, the spur gear part 21a of the large bevel gear 22
By driving the large bevel gear 22, the large bevel gear 22 is rotated in the forward and reverse directions by a predetermined amount, and thereby the small bevel gears 9 of each unit meshing with the bevel gear 22 are rotated in the forward and reverse directions, and the screw shaft 1
Since the tool opening/closing block 11 is moved forward and backward through the vertical movement of 0, each forming tool 2 for rolling within the Bouber housing 13 can be moved into and out of contact with the outer peripheral surface of the tubular body 1.

Therefore, the forming tool 2 of each unit is crimped onto the outer periphery of the tube, and as the arbor 3 rotates from each rotary shaft 31 via the universal joint 4, the forming tool 2 is transferred to the outer circumferential surface of the material tube 1 as shown in the first figure. Accordingly, a spiral fin 1a having a predetermined lead angle can be extruded.

In addition, when adjusting the lead angle, each pin is adjusted by rotating the bundle 190, passing through the guide 16, the continuous rod 15, the spherical bearing 15a, and the worm 17 through the worm wheel 180.
4 around the tubular body center line A, a desired lead angle can be obtained by rotating the arbor housing 13 about the pin 12 as a fulcrum.

According to the present invention, there is no need to replace the entire rolling part for each difference in the size of the material tube 1 and the number of threads of the spiral fins, and it is not necessary to replace the entire rolling part, and each tool unit arranged on the frame 8 It can be easily handled by changing the advance or retreat of the forming tool 2 with respect to the center of the workpiece, and is extremely versatile.

Moreover, the opening/closing adjustment operation of the forming tool 2 at this time can be accurately and quickly adjusted by the only drive cylinder 36 (this does not necessarily have to be a cylinder mechanism). Gear portion 21a of clutch 21 Large bevel gear 22 Small bevel gear 9
The cylinder 36 is decelerated through the interlocking mechanism.
In this case, the opening/closing stroke of the forming tool can be reduced to a few tens of minutes relative to the cylinder stroke, requiring only small hydraulic pressure, achieving high accuracy, and opening/closing the three tools. Accurately tuned.

In addition, the required structure is simplified, the handling and operation are simple and easy, and the disassembly and assembly of each part, especially around the forming tool unit, is easy, and maintenance management is also hassle-free.
This is an excellent method for rolling and forming new tube fins.

[Brief explanation of drawings]

FIG. 1 is a side cross-sectional view of the main parts of the apparatus of the present invention, mainly showing the forming tool unit, FIG. 2 is an external plan view of the entire apparatus, and FIG. 3 is an exploded perspective view of the main parts. 1...Material pipe body, 2...Forming tool, 3
...Arbor 4...Universal joint, T.
...Internal tool, 8...Frame, 13.
... Arbor house sink, 14 ... Lead angle adjustment pin, 11 ... Tool opening/closing block,
12...Housing support pin, 9...
Small bevel gear, 10... Screw shaft, 22...
・・Large bevel gear, 21・・・・Clutch, 20・
... Rotating disc, 17 ... Worm, 18
... Worm wheel, 16 ... Guide, 15 ... Value, 1a ... Spiral fin.

Claims (1)

[Scope of utility model registration request] Three arbors with forming tools attached to the outer periphery are arranged evenly around the circumference within the frame so as to maintain a predetermined lead angle in the longitudinal direction, and fins are rolled on the outer periphery of the tube body using the three forming tools. The device comprises: an arbor housing rotatably supporting an arbor inside the arbor housing; a lead angle adjustment pin attached to an end of the arbor housing; a tool opening/closing block provided outside the arbor housing; , a radial pin that rotatably supports the arbor housing with respect to the tool opening/closing block, and a screw shaft protruding in the radial direction attached to the outside of the tool opening/closing block, and are arranged at equal circumferences within the frame. three forming tool units, three small bevel gears rotatably attached to the threaded frame on the outer periphery of the screw shaft, and a large bevel gear rotatably attached to the outer periphery of the frame and meshing with the small bevel gear group. A bevel gear, a drive mechanism that selectively transmits rotational driving force to the dog bevel gear, a lead angle adjustment wheel rotatably attached to the outer periphery of the frame end, and a lead angle adjustment wheel attached to each of three side surfaces of the wheel at its tip. and a drive mechanism that is connected to the lead angle adjusting pins via spherical bearings and transmits rotation of the wheel to the arbor housing.