JP2002018539A - Drawing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To draw a tip of a pipe in an inclined manner to the axis of the pipe when the tip of the pipe is required to be drawn with an angle formed with respect to the axis of the pipe. SOLUTION: This drawing device comprises a spindle mechanism 2 having, at the tip part of the main spindle, a tool fitting base 8 for supporting a drawing tool movably in the radial direction, a work pipe holding mechanism 3 arranged to face it, and a work pipe turning mechanism 4 arranged opposite to the spindle mechanism across the holding mechanism 3. In the work pipe holding mechanism 3, the center axis of the pipe to be supported is made turnable and displaceable with respect to the axis of the spindle, and the pipe turning mechanism 4 is provided with a turning means for holding the pipe supported by the pipe holding mechanism 3. The pipe is turned by selecting an arbitrary angle, the tip of the work pipe is held at an arbitrary angle with respect to the axis of the pipe, and then drawing processing is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing apparatus, and more particularly to a drawing apparatus suitable for drawing a relatively short pipe tip.

[0002]

2. Description of the Related Art Conventionally, a conventional drawing method for the tip of a pipe is to insert a pipe into a rotating main shaft, rotate the pipe, and shift a drawing tool in a direction perpendicular to the rotation axis. A method of performing drawing processing is adopted.

[0003]

However, at the time of drawing, it is sometimes required to draw the pipe at an angle to the pipe center with respect to the pipe axis. Drawing for this purpose is difficult with the above-mentioned normal drawing. SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a drawing apparatus for performing a drawing process on a pipe at an angle with respect to an axis of the pipe.

[0004]

According to a first aspect of the present invention, there is provided a spindle mechanism having a tool mount for supporting a drawing tool at a tip end of the spindle so as to be movable in a radial direction. A pipe gripping mechanism to be processed and a pipe rotating mechanism to be processed disposed on the opposite side of the spindle mechanism with respect to the gripping mechanism, wherein the spindle mechanism moves in the front-rear direction with respect to the pipe gripping mechanism. The pipe gripping mechanism for processing enables the central axis of the pipe to be supported to rotate and deviate with respect to the center axes, and the pipe rotating mechanism grips the pipe supported by the pipe gripping mechanism. A rotating means for selecting and rotating the pipe at an arbitrary angle is provided, and the tip of the pipe to be processed is drawn at an arbitrary angle with respect to the pipe axis.

In the present invention having the above structure, a pipe to be processed is gripped by a gripping mechanism, and a drawing tool is mounted on a tool mounting table mounted on a rotating spindle so as to be movable in a radial direction. Thus, the drawing tool is moved in the radial direction to perform the drawing. At the same time, by rotating the tip of the pipe to be processed to a predetermined angle using a rotating means,
The drawing process can be performed by inclining the tip of the pipe at a predetermined angle with respect to the pipe axis.

According to a second aspect of the present invention, the pipe gripping mechanism for processing comprises a transition means for displacing the center line of the pipe to be supported with respect to the center axis of the main shaft, and a rotating means for rotating by a predetermined angle. It is characterized by having.

According to the present invention having the above-mentioned structure, the pipe gripping mechanism for processing comprises a shifting means for displacing the center line of the supported pipe with respect to the center line of the main shaft and a rotating means for rotating by a predetermined angle. With this arrangement, the pipe tip can be held at a required angle with respect to the machining axis when drawing the tip of the pipe by operating the respective means.

In a third aspect of the present invention, the pipe rotating mechanism has a pipe gripper attached to a tip thereof, and includes a reciprocating shift means for moving forward and backward with respect to the pipe gripping mechanism, and a rotary mechanism for rotating the pipe to be gripped by a predetermined angle. The means is provided with a rotation restricting member.

According to the present invention having the above structure, the pipe held by the gripping mechanism can be rotated at a predetermined angle by the rotation restricting member.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. As shown in FIG. 1, a drawing apparatus 1 includes a main spindle mechanism 2 and a pipe gripping mechanism 3 for supporting a pipe P to be processed, which is disposed to face the main spindle mechanism.
And a working pipe rotating mechanism 4 disposed on the opposite side of the main spindle mechanism 2 with the holding mechanism 3 interposed therebetween.

The main spindle mechanism 2 is mounted slidably in the front-rear direction along a guide rail 6 installed on a base 5 and supports a drawing tool R at the tip of a main spindle 7 so as to be movable in a radial direction. A tool mount 8 is provided. The main shaft 7 is rotatably supported by a housing 9 via a bearing 10 and is driven by a drive motor M. The tool mount 8 includes a main mount 13 having a guide groove 12 for guiding the support member 11 of the drawing tool R in the radial direction, and a spiral groove 1 for guiding the support member 11 in the radial direction.
The support member 11 is provided with a guide pin 16 which protrudes into the spiral groove 15. The main shaft 7 is hollow, and a cam shaft 17 having a cam plate 14 attached to the tip is inserted into the main shaft 7. The cam shaft 17 is also hollow, into which the connecting rod 18 of the mandrel 19 inserted into the processing pipe P is inserted.

The camshaft 17 is connected to the speed change mechanism 20 by the main shaft 7.
Is driven through. The speed change mechanism 20 is configured to increase or decrease the number of revolutions of the main shaft and transmit the result to the camshaft 17. As the speed change mechanism, for example, a so-called planetary system using a planetary gear mechanism or a bending-meshing drive transmission device ( An appropriate method is applied, such as Japanese Patent Application No. 10-309777. Reference numeral 21 denotes the control mechanism.

The pipe holding mechanism 3 includes upper and lower claws 30 and 31 that sandwich the pipe P, and a cylinder 32 that raises and lowers the upper claws 30.
And a mounting table 33 on which these are mounted, a rotating means 34 for rotating the mounting table 33, and an eccentric shifting mechanism 35 for shifting these in a direction perpendicular to the center line X (hereinafter referred to as a processing axis) of the main shaft 7. And The rotating means 34 is a drive motor M2
And a worm shaft 37 and a worm wheel 37 which is attached concentrically to the mounting base 33 and meshes with the worm. 38 is a mounting table 33
1 shows a traveling rail.

The pipe rotating mechanism 4 moves the pipe P back and forth with respect to the pipe holding mechanism 3 and grips the supported pipe P, selects the pipe at an arbitrary angle, and rotates the pipe. Chuck (for example, three-jaw chuck) 4
0, a rotating means 4 for rotating the chuck 40 by a predetermined angle.
1 and a cylinder 43 as reciprocating means for moving a support table 42 on which the rotating means 41 is mounted to reciprocate. Reference numeral 44 denotes a support table advance / retreat rail. The rotating means 41 includes a drive motor M3 and a speed reducer 46, and includes an encoder 47 as a rotation restricting member. The drive motor M3 uses a servomotor.

Next, an example of a drawn product PA of a pipe P by the above described drawing device is shown in FIGS. That is, an example is shown in which one end P1 of the pipe P is drawn at a horizontal angle B with respect to the pipe axis A, the other end P2 is drawn at a horizontal angle C, and the vertical direction is drawn at an angle D with respect to the horizontal line L. Show.

First, as shown in FIG.
, A pipe P is attached thereto and rotated to form an end P2. That is, the rotation mechanism 34 and the transition mechanism 35 of the holding mechanism 3 are arranged such that the tip of the pipe is located on the processing axis X of the main spindle mechanism 2.
Is operated to hold the pipe axis A at a horizontal angle C with respect to the processing axis X at the tip of the pipe and perform drawing. Alternatively, the pipe axis A is positioned on the processing axis X, and the pipe axis is shifted to the angle C while performing drawing.

Next, the pipe axis A is rotated so as to be positioned on the processing axis X (FIG. 9). Then, the rotating mechanism 4 is moved forward, the pipe P is gripped by the chuck 40, and the holding mechanism 3 is moved.
The lifting cylinder 32 is loosened and the vertical
(See FIG. 13) (FIG. 10), and the pipe P is fixed by the cylinder 32. The rotation angle in this case is measured by the encoder 47.

Next, the end P1 on the opposite side of the pipe is shifted to the main shaft 7, is fixed at an angle B, and is drawn in the same manner as the end P2 (FIG. 11). The completed product PA is shown in FIGS.

[0019]

As described above, according to the present invention, a drawing tool is provided on the main spindle mechanism, and a pipe holding mechanism for processing is opposed thereto, and a pipe for processing is provided on the opposite side of the pipe holding mechanism. A rotating mechanism is provided, and the pipe holding mechanism for processing allows the center axis of the pipe to be supported to be rotatable with respect to the center axes, so that the tip of the pipe held by the holding mechanism is aligned with the pipe axis. The pipe can be inclined at an angle, and the pipe can be rotated at an arbitrary angle by the pipe rotating mechanism. Processing can be performed. Also, at this time, the pipe holding mechanism for processing comprises a transition means for displacing the center line of the pipe to be supported with respect to the center axis of the main shaft, and a rotating means for rotating the pipe by a predetermined angle. The rotation angle and the amount of deviation can be accurately set with respect to the center, that is, the machining axis. Furthermore, the pipe rotation mechanism has a reciprocating transfer mechanism that attaches a pipe holding chuck to the tip and moves forward and backward with respect to the pipe holding mechanism.
By providing the rotating means for rotating the pipe to be held by a predetermined angle, the rotating angle of the pipe can be accurately set.

[Brief description of the drawings]

FIG. 1 is an overall front view of a drawing apparatus according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a longitudinal sectional view of a main part of a spindle mechanism.

FIG. 4 is a front view of a drawing tool mount.

FIG. 5 is a right side view of a processing pipe holding mechanism.

FIG. 6 is a front view of a pipe rotating mechanism.

FIG. 7 is a plan view of FIG.

FIG. 8 is an explanatory view of a drawing procedure of one end of a pipe to be processed.

FIG. 9 is an explanatory diagram of a rotation standby state after drawing is completed in FIG. 8;

FIG. 10 is an explanatory view of a rotation procedure of a pipe to be processed.

FIG. 11 is a drawing explaining the drawing procedure of the other end of the pipe to be processed.

FIG. 12 is a plan view of a product after drawing is completed.

FIG. 13 is a side view of the product in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drawing apparatus 2 Spindle mechanism 3 Pipe gripping mechanism 4 Pipe rotation mechanism 34 Pipe mounting table rotation means 35 Deflection transition means 40 Chuck 41 Rotation means 43 Reciprocation transition means 47 Rotation restricting member

Claims (3)

[Claims] 1. A spindle mechanism having a tool mount for supporting a drawing tool at a tip end of the spindle so as to be able to shift in a radial direction, a pipe gripping mechanism for processing provided opposed to the spindle mechanism, and a gripping mechanism sandwiching the gripping mechanism. A pipe rotating mechanism for processing provided on the opposite side of the main spindle mechanism, wherein the main spindle mechanism is movable in the front-rear direction with respect to the pipe gripping mechanism, and the pipe gripping mechanism for processing is a central axis of the pipe to be supported. The pipe can be rotated and deviated with respect to the main axes, and the pipe rotation mechanism has a rotation means for gripping a pipe supported by the pipe gripping mechanism, selecting the pipe at an arbitrary angle, and rotating the pipe, A drawing apparatus wherein a drawing end of a pipe to be processed is drawn at an arbitrary angle with respect to the pipe axis. 2. A pipe gripping mechanism for processing, comprising: a transition means for displacing a center line of a pipe to be supported with respect to a center axis of a main shaft; and a rotating means for rotating by a predetermined angle. The drawing apparatus according to claim 1. 3. The pipe rotating mechanism has a pipe holding chuck attached to a tip end thereof, and includes a reciprocating transfer means for moving forward and backward with respect to the pipe gripping mechanism. The drawing apparatus according to claim 1, further comprising a regulating member.