JPH0685946B2 - Chamfering method for pipe work - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for chamfering an end of a pipe-shaped work.

(Prior Art) When chamfering the peripheral edge of the end of the pipe-shaped metal fitting, conventionally,
As shown in FIG. (A), the metal fitting 100 is cut out from the long pipe material longer than the length l of the final product by a certain dimension.
The method of chamfering by cutting the edge was used.

(Problems to be Solved by the Invention) However, in this method, as shown in FIG. 2B, long chips 102 are generated during processing to cause material loss and There is a problem in that the processing is expensive and time-consuming, and that the cutting powder 102 stains the processing device and other devices.

Further, if the cutting chips 102 become long, they will be caught in the processing device and cause troubles, which makes it difficult to unmanner the conventional chamfering processing step.

(Means for Solving the Problem) The invention of the present application has been made to solve such a problem, and the gist thereof is a method of chamfering an end portion of a pipe-shaped workpiece, which is a roller holding method. On the front of the body,
While arranging the first and second forming rollers side by side in a direction in which their axes are parallel to each other on a radiation passing through a specific point of the central portion and forming an inclined forming surface on at least one of the forming rollers, The end surface finishing roller is arranged in a direction at a right angle to the first and second forming rollers at a position on a circumference centered on a specific point and passing between the first and second forming rollers. Alternatively, one of the inclined forming surfaces of the second forming roller is brought into contact with the outer or inner peripheral edge of the end portion of the pipe-shaped work to be processed under pressure and the other is brought into contact with the other peripheral edge or peripheral surface under pressure. The first and second forming rollers squeeze the end portion of the work, and in that state, the first and second forming rollers relatively roll along the end portion of the work, and the circumference of the end surface finishing roller is also increased. Face The end face of the work is chamfered while plastically deforming the end part of the work while the end face of the work is chamfered while the end face of the work is chamfered substantially simultaneously with the chamfering process. Especially.

(Operation and Effect of the Invention) As described above, in the present invention, the end portions of the pipe-shaped work to be processed are clamped by the first and second forming rollers, and in this state, these are moved along the end portions of the work. Relative rolling is performed and the chamfered surface is formed by plastically deforming the outer and / or inner peripheral edge of the same end based on the applied pressure, so that the work is cut when cutting from the pipe material as in the conventional method. It is not necessary to cut out a long length in anticipation of the cost, and no chips are generated during processing. Therefore, according to this method, no material loss occurs, and the cost and labor required for the disposal of chips are reduced, and at the same time, the problem of equipment contamination due to chips is eliminated.

Further, since the cutting chips are prevented from coming out, troubles in the processing device and the like due to the inclusion of the cutting chips are eliminated, and it is possible to achieve the unmanned device.

In the present invention, the first forming roller and the second forming roller are arranged side by side on the radiation passing through the specific point on the front surface of the roller holding body, and by these, relative rolling motion is performed with the end portion of the work clamped. Therefore, the end portion of the work can be plastically worked satisfactorily and chamfering can be performed without causing deformation or distortion of the entire shape of the work.

The present invention is characterized in that an end surface finishing roller is used together with these forming rollers. That is, in addition to chamfering by the first and second forming rollers, the peripheral surface of the end surface finishing roller is brought into contact with the work end surface while rolling to simultaneously finish the work end surface. It is possible to satisfactorily correct or remove irregularities or the like on the end surface of the work that occurs during processing by the forming roller.

In addition, since the end surface finishing roller makes contact with the end surface of the work for finishing while rotating itself, there is an advantage that a friction resistance force is not generated between the end surface finishing roller and the work end surface and the finishing work can be smoothly performed.

(Example) Next, the Example of this invention is described in detail based on drawing.

In FIGS. 1 and 2, reference numeral 10 denotes a rotating main body roller holding main body, which can be rotated while being held by a chuck (not shown). On the front surface of the rotary body 10, there are a total of three first molding rollers 12 and second molding rollers 14.
They are arranged in pairs. The first forming roller 12 and the second forming roller 14 of each set pass through the rotation axis O (specific point) on the front surface of the rotating body 10 and are separated from each other by 120 degrees.
It is arranged on the radiation of each of the books. The first forming roller
The 12 members and the second forming rollers 14 are arranged at positions that are separated from the rotation axis O by an equal distance in the radial direction.

The first forming roller 12 is fixed to the front surface of the rotating body 10 via a shaft 16, a thrust bearing 18, and a radial bearing 20 as shown in FIG.
It is rotatably attached to the front surface of the rotary body 10 via a thrust bearing 24 and a radial bearing 26. The first forming roller 12 and the second forming roller 14 are
The respective outer peripheral surfaces are arranged so as to be in contact with each other at the positions lifted by the same distance from the front surface of the rotating body 10. As shown in FIG. 4, a stepped surface 28 is formed on one of the first forming rollers 12 so as to rise from the outer peripheral surface of the roller at a right angle in the axial direction thereof at a position retracted a certain distance rearward from the front end surface. Further, following the stepped surface 28, an inclined forming surface 30 inclined at a predetermined angle and the inclined forming surface
A guide surface 32 continuing from 30 is formed.

On the other hand, the second forming roller 14 has a stepped surface of the first forming roller 12.
An inclined molding surface 34 is formed from a position corresponding to 28, and further, a guide surface 36 in a direction parallel to the axis of the roller is formed subsequently. The distance between the pair of guide surfaces 32, 36 is
It is made slightly thicker than the thickness of the work to be described later, and the end of the work can be inserted into the gap between the guide surfaces 32 and 36.

On the front surface of the rotary body 10, three end surface finishing rollers 44 are arranged at positions separated by 120 degrees and between the three sets of first and second forming rollers 12 and 14. These end surface finishing rollers 44 are for finishing forming the end surface of the work, and at a position separated from the axis O of the rotary body 10 by a predetermined distance, in the direction perpendicular to the first and second forming rollers 12 and 14 and their own. The axis is arranged so as to pass through the axis O of the rotary body 10. The end surface finishing roller 44 has a shaft 46 and a supporting main body 48 supporting the shaft 46, and strictly speaking, the end surface of the work is stepped by the step of the first forming roller 12 at a position lifted by a predetermined distance from the front surface of the rotating main body 10. Immediately before contacting the surface 28, it is arranged at a position where it can contact the peripheral surface of the end surface finishing roller 44. As shown in FIG. 3, these end surface finishing rollers 44 are fixed to the front surface of the rotating main body 10 by bolts via spacers 50. By changing the thickness of the spacer 50, The floating distance of can be changed.

Next, a procedure for chamfering the end portion of the work using this apparatus will be described.

FIG. 6 shows a pipe-shaped metal fitting as a processing target, that is, a work. As shown in the figure, the pipe-shaped metal fitting 40 is cut out by a certain dimension shorter than the length dimension 1 of the final product.

To chamfer the end of this metal fitting 40,
While rotating, the metal fitting 40 is held by a robot hand (not shown) as shown in FIG. 1, and one end of the metal fitting 40 is held between the guide surfaces 32 and 36 of the first molding roller 12 and the second molding roller 14. It is only necessary to insert it into the gap and to press it axially against the inclined molding surfaces 30 and 34 of the roller. In this way, the outer or inner peripheral edge of the metal fitting 40 is sandwiched between the molding surfaces 30, 34 of the three sets of molding rollers 12, 14 and is pressed, and the molding rollers 12, 14 rotate there. When it is rolled along the end of the metal fitting 40 as the main body 10 rotates, the end is plastically deformed based on the pressing force of the forming rollers 12 and 14, and the outer and inner peripheral edges are shown in FIG. Chamfer as shown in B)
42 is formed. That is, the end of the metal fitting 40 is chamfered. At this time, the end surface of the metal fitting 40 is finished by the end surface finishing roller 44.

After chamfering one end of the metal fitting 40 as described above, the metal fitting 40 is then pulled out from between the rollers 12 and 14 and inverted in the axial direction. Insert the end of the between the forming rollers 12 and 14,
Similarly to the previous time, the outer and inner peripheral edges are pressed against the inclined molding surfaces 30, 34 of the molding rollers 12, 14. As a result, chamfering of the peripheral portion is performed.

Thus, the forming rollers 12 and 14 do not rotate (rotate) themselves to generate a frictional force with the metal fitting 40 when the metal fitting 40 is plastically deformed, so that the metal fitting 40 does not receive an excessive force. It is processed smoothly and does not cause distortion or deformation.

Although the embodiments of the present invention have been described in detail above, the present invention can be implemented in other modes.

For example, in the above example, the chamfering process is performed on both the inner and outer peripheral edges of the pipe-shaped metal fitting, but the present invention is also applicable when the chamfering process is performed only on either the outer or inner peripheral edge. . In the above example, the rotating body is rotated to cause the first forming roller, the second forming roller, and the end surface finishing roller to roll with respect to the work. However, by rotating the work itself, the rollers are relatively rotated. It is also possible to make it move.

Further, the present invention can be applied not only to the metal work as in the above example but also to chamfering a plastic pipe-like work, and various changes are made without departing from the spirit of the invention. It can be carried out in various ways.

[Brief description of drawings]

1 and 2 are a sectional view and a front view of a main part of an apparatus for carrying out a chamfering method according to an embodiment of the present invention, respectively, and FIG. 3 is an end surface finishing roller and its peripheral part in the same apparatus. FIG. 4 and 5 are explanatory views of the method according to the embodiment of the present invention. FIG. 6 is an explanatory view for explaining a procedure for chamfering a pipe-shaped metal fitting by the apparatus shown in FIGS. 1 and 2, and FIG. 7 is an explanation for explaining a conventional chamfering method. It is a figure. 10: Rotating body 12: First forming roller, 14: Second forming roller 30,34: Inclined forming surface 40: Metal fitting, 44: End surface finishing roller 50: Spacer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinichi Oyama 3-7, Kutaya Shinmachi, Shijonawate City, Osaka Prefecture Yoshikawa Iron Works Co., Ltd. (56) Reference JP-A-57-202930 (JP, A)

Claims (1)

[Claims] 1. A method for chamfering an end portion of a pipe-shaped workpiece, wherein the first and second forming rollers are provided on a front surface of a roller holding body on a radiation passing through a specific point of a central portion thereof. While arranging them side by side in such a manner that their axes are parallel to each other and forming an inclined molding surface on at least one of the molding rollers, on the circumference passing through the first and second molding rollers with the specific point as the center. At the position, the end surface finishing roller is arranged in a direction perpendicular to the first and second forming rollers, and one inclined forming surface of the first forming roller or the second forming roller is formed on the end portion of the pipe-shaped work to be processed. The outer or inner peripheral edge is brought into contact with pressure and the other peripheral edge or peripheral surface is brought into contact with pressure to press the end portion of the work by the first and second forming rollers, and in that state, One, two The forming roller is caused to make a relative rolling motion along the end of the work, and the peripheral surface of the end surface finishing roller is made to abut on the end face of the work to make a relative rolling motion along the end. A method for chamfering a pipe-shaped work, characterized in that the end of the work is subjected to chamfering while being plastically deformed, and the end face is finished substantially simultaneously with the chamfering.