JP2502581Y2 - Extraction device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube material drawing apparatus, and provides a drawing apparatus designed to efficiently draw a long tube material into a smooth mirror surface of high quality.

[0002]

2. Description of the Related Art Conventionally , honing is generally used to process the inner peripheral surface of a short tube material into a smooth mirror surface.

[0003]

An invention is to provide a and in the case of the machining of the inner peripheral surface of the pipe material long by honing, support rigidity of the machining tool is liable to vibrate reduced during processing, chatter vibration is generated Since it is easy to process, there is a limit to the length that can be processed, it is impossible to process the inner peripheral surface of a long material, and moreover, a long time is required and the processing efficiency is poor.

[0004] Moreover, the above in the conventional processing method, because the inner circumferential surface of the pipe material by honing is scraped, manufactured tube
As for the structure of the inner peripheral surface of the product, the fiber structure that has been formed long in the rolling process or the like is cut into pieces, and the strength of the pipe product is reduced due to mirror finishing.
This invention was proposed in view of these problems found in conventional mirror surface processing, and it has good processing efficiency and
The present invention proposes a drawing device devised so that a long fiber structure is formed near the inner peripheral surface to increase the strength of the pipe product.

[0005]

The structure of the present invention for solving the above-mentioned problems is a plug 2 to be inserted into a tube material 12.
9 is provided so as to be rotationally driven around the axial center of the extraction central axis, and the rotationally driven plug 29 is the plug 29.
It is characterized in that it is constituted by a plurality of rollers A which are provided on the outer peripheral surface of and roll against and contact the inner peripheral surface of the tube material 12.

Further, it is characterized in that the rotational driving speed of the rotationally driven plug 29 is changed and adjusted.

[0007]

The inner peripheral surface of the tube material 12 is processed into a mirror surface by the number of rollers A that rotate on the outer peripheral surface of the rotationally driven plug 29, so that the long tube material 12 can be processed efficiently.

When the tube material 12 is pulled out, the tube material 12
On the inner peripheral surface of the tube, the material is rolled in two directions, the axial direction of the tube material 12 and the circumferential direction of the rotation of the plug 29 , whereby two speeds of the drawing speed and the rotation speed of the plug 29 are combined. The long fiber structure rolled in the direction is formed,
This long fiber structure improves the strength of the tube product.

By changing and adjusting the rotational driving speed of the rotationally driven plug 29 , the direction of the flow of the formed fibrous structure can be adjusted as desired, which makes it suitable for the intended use of the tubular product. A tube product having a good fibrous structure is obtained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional front view of a main part of an embodiment of a drawing device, and FIG. 2 is a sectional view taken along the line XX of FIG.
FIG. 4 is a partial cross-sectional plan view of the left side portion of the pulling device of this embodiment . This embodiment is characterized in that the plug 29 is driven to rotate. A flat guide surface 2 is provided on the top of the traveling bed 1, and a pulling carriage 3 is provided.
Is coupled to a piston rod 4 of a carriage cylinder (not shown) fixed to the traveling bed 1 so as to be movable in the left-right direction in FIG. A plurality of product receiving cylinders 5 erected at the center of the traveling bed 1 in the left-right direction are arranged in the longitudinal direction of the traveling bed 1, and the pistons 6 of the product receiving cylinders 5 are upwardly moved from the guide surface 2. It is formed to be projectable.

The pull-out carriage 3 is provided with an upper claw piece 8 engaged with the guide groove 7 in a vertically slidable manner and a fixed lower claw piece 9, and the upper claw piece 8 is a piston of the chuck cylinder 10. It is moved up and down by 11, and the mouthpiece portion 12a of the tube material 12 is chucked by the upper claw piece 8 and the lower claw piece 9.

A spherical recess 13a is formed in the center of the die stand 13, and a spherical portion 14a provided in the center of the die holder 14 is rotatably fitted into the spherical recess 13a to allow the periphery of the die holder 14 to rotate. The part is elastically attached to the die stand 13 by a plurality of attachments 15 to be described later. The die 16 is fitted in the center of the die holder 14, and the spherical portion 14a is formed so that the center O of the spherical portion 14a of the die holder 14 coincides with the drawing direction center O of the drawing portion 16a of the die 16. The drawing-direction center O of the narrowed portion 16a of the die 16 is located within the extension plane of the guide surface 2 of the traveling bed 1 which is the moving center line of the drawing carriage 3, so that the drawing carriage 3 and the die 16 are located.
And are installed facing each other.

The fixture 15 in the illustrated example is a die holder 14
Bolt 17 which is loosely inserted into the die stand 13 and screwed into the die stand 13, the head 17a of the bolt 17 and the die stand 13
And a spring 18 interposed between and. The tube material 12 is
It is supported by a receiving roller (not shown) arranged in the longitudinal direction of the traveling bed 1.

An elevating cylinder 2 having one end pivotally supported by a shaft 20.
The insertion carriage 24 is configured to be movable in the longitudinal direction along the rails 25, 25 on the insertion machine base 23 which is provided so as to be lifted and lowered by the movement of the piston 22 of 1. A base of the plug bar 27 is rotatably supported by a bearing 28 on a plug support 26 fixed to the insertion machine base 23 around an axis of the plug bar 27, which is the extraction center axis.

A plug 29 is attached to the tip of the plug bar 27.
Is attached by a nut 30 so that the plug core is aligned with the shaft core of the plug bar 27. A plurality of rollers A are pivotally supported on the outer peripheral surface of the plug 29. In the shaft support of each roller A, the center line of the roller rotation shaft is the plug 2
It is set so as to be parallel to the center line of the plug 9 and each roller axis is located concentrically with respect to the plug core of the plug 29. The plug 29 attached to the plug bar 27 is set such that the center of the roller A in the longitudinal direction is substantially within the same cross section as the drawing direction center O of the drawing portion 16a of the die 16.

The rotation speed of the plug bar 27 is adjustable by a plug drive motor 32 with a transmission 31 attached to the plug support 26 and a belt transmission mechanism 33 for transmitting the rotation of the plug drive motor 32. Is configured to be.

A plug bar 27 is attached to the insertion carriage 24.
A plug support portion 34 that supports the rod in a longitudinal direction is supported, and a rear chuck 35 that holds the rear portion 12b of the tube material 12 is attached. The plug support portion 34 is formed by fitting the plug bar 27 into a cylindrical hole of a bush-shaped bearing member 36.

The rear chuck 35 is a V-shaped chuck claw 3.
Left and right chuck arms 38, 38 to which 7 is attached
Is rotatably and pivotally supported by the pin 39 on the plug supporting portion 34, and the chuck cylinder 40 and its piston 41 are connected to the left and right chuck arms 38, 38 in a bridge shape.

The insertion carriage moving mechanism 43 for moving the insertion carriage 24 has a pair of left and right chains 44 and 44, one end of which is locked to the insertion carriage 24, wound around sprocket wheels 45 and 45. I'll pull it over and pull the sprocket wheel 45,
The rotary shaft 46 of 45 is driven by a motor 48 with a transmission 47 in the insertion direction of the tube material 12. In the drawing process, when the rear portion 12b of the tube material 12 is held by the rear chuck 35 and the drawing carriage 3 moves the tube material 12 to the right in FIGS. 1 and 3,
The rotating shaft 46 is provided with a brake mechanism 49 for preventing the tail portion 12b of the tube material 12 from swinging backwards.

The illustrated brake mechanism 49 comprises a clutch brake 50 provided between the motor 48 and the rotary shaft 46. When the plug 29 is inserted into the pipe material 12, the clutch of the clutch brake 50 is set to the connected state. As a result, the rotation shaft 46 is rotated in the plug 29 insertion direction by the motor 48, and in the extraction process, the clutch of the clutch brake 50 is switched to the disengaged state to operate the brake of the clutch brake 50 to operate the rotation shaft 46. And a structure for applying a brake to the insertion carriage 24.

Next, the extraction work of the above embodiment will be described. Inserting machine stand 23 by protruding the piston 22 of the lifting cylinder 21
At the same time, the plug bar 27 is raised obliquely upward, an insertion carriage (not shown) is moved to allow the rear portion 12b of the pipe blank 12 to be seen through the plug 29, and the piston 22 of the elevating cylinder 21 to be drawn in. Return the material 12 and the plug bar 27 to the horizontal position. The rear part 12 of the tube material 12
Since the vicinity of b is supported by a receiving roller (not shown) arranged in the longitudinal direction of the traveling bed 1, the piston 41 of the rear chuck 35 is moved in and out to grasp the rear part 12b of the tube material 12 by the rear chuck 35. . Then, it is confirmed that the tube material 12 and the plug 29 are concentric, and the motor 48 is driven to move the insertion carriage 24 to the plug bar 2.
7 toward the rear part of FIG. 3, the tube material 12 also moves to the left together with the rear chuck 35, and the tube material 12
Is inserted into the plug 29. Next, the mouthpiece portion 12a of the tube material 12 inserted into the die 16 is inserted into the upper nail piece 8 and the lower nail piece 9
Grab with

When the pipe material 12 is inserted at a predetermined position and the mouthpiece portion 12a is gripped by the upper and lower claw pieces 8 and 9, the plug drive motor 32 is driven and the transmission 31 and the belt transmission mechanism 33 act. , The plug bar 27 rotates at a predetermined speed. Simultaneously with the start of the rotation of the plug bar 27, the piston rod 4 of the carriage cylinder (not shown) gradually retracts to the right in FIG. 1 to move the extraction carriage 3 to the right, whereby the pipe blank 12 is moved to the die 16. It is pulled out to a predetermined pipe diameter by the narrowed portion 16a and the plug 29.

During this pulling-out operation, the plurality of rollers A forming the plug 29 revolve around the plug core of the plug 29, while each of the rollers A is connected to the pipe material 12.
Rotates strongly while making strong contact with the inner surface of the. The inner peripheral surface of the tube material 12 is processed into a mirror surface by these rollers A.
Then, when the pipe material 12 is pulled out in this way, the inner peripheral surface of the pipe material 12 is moved in the direction in which the pulling movement speed by the movement of the pipe material 12 and the rotation driving speed of the plug 29 are combined. The vicinity of the peripheral surface is rolled to form a long fiber structure that is rolled in the combined direction of both of these speeds. Due to the long fiber structure thus formed, the shear strength particularly near the inner peripheral surface of the tube material 12 is significantly increased and the strength of the tube product is improved.

If the rotational drive speed of the plug 29 is set to a high speed by the transmission 31, for example, the direction of the formed fiber structure becomes closer to the circumferential direction, while the rotation of the plug 29 is rotated. If the driving speed is set to a low speed, the direction of the formed fiber structure will be closer to the axial direction. By changing and adjusting the rotational driving speed of the plug 29 that is rotationally driven in this way, the direction of the flow of the formed fiber structure can be adjusted as desired, which makes it suitable for the intended use of the tubular product. A fibrous tubing product is obtained.

The drawing direction center O of the narrowed portion 16a of the die 16 is made to coincide with the spherical center of the spherical portion 14a of the die holder 14, and the peripheral portion of the die holder 14 is provided with a plurality of fixtures 15.
Since it is elastically held on the die stand 13 by means of the drawing, the drawing force applied to the tube material 12 causes the drawing direction center O of the narrowed portion 16a to always approach the spherical center of the spherical portion 14a, so that the die 16 and the die die holder are kept. 14 is held on the die stand 13 by the self-aligning action. Even if the die 16 is slightly rotated, the center O of the drawing portion 16a in the drawing direction does not almost deviate from the movement center line of the drawing carriage 3, so that the drawing bending appearing in the pipe product becomes small.

[0026]

As described above, according to the present invention, the inner peripheral surface of the tube material 12 is machined into a mirror surface by the plurality of rollers A which rotate on the outer peripheral surface of the rotationally driven plug 29, respectively, so that the long material can be elongated. The pipe material 12 can be processed efficiently.

When the tube material 12 is pulled out, the tube material 12
On the inner peripheral surface of the tube, the material is rolled in two directions, the axial direction of the tube material 12 and the circumferential direction of the rotation of the plug 29 , whereby two speeds of the drawing speed and the rotation speed of the plug 29 are combined. As a result of forming the long fiber structure rolled in the direction, the shear strength of the tube material 12, especially in the vicinity of the inner peripheral surface, is remarkably increased, and the strength of the tube product is improved.

By changing and adjusting the rotational driving speed of the rotationally driven plug 29 , the direction of the flow of the formed fiber structure can be adjusted as desired, which makes it suitable for the intended use of the tubular product. It is possible to obtain a tube product having a fibrous structure, and it can be configured as a practicing drawing device.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a main part of an embodiment of a pulling device of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a partial cross-sectional plan view of the left side portion of the extraction device of FIG.

[Explanation of symbols]

 12 Tube material 29 Plug A Roller

Claims (2)

(57) [Scope of utility model registration request] 1. A plug to be inserted into a pipe material is provided so as to be rotationally driven around an axis of a pulling center axis, and the rotationally driven plug is provided on an outer peripheral surface of the plug so that An extraction device comprising a plurality of rollers that roll and contact the peripheral surface. 2. The pulling device according to claim 1, wherein the rotary driving speed of the rotary driven plug is changed and adjusted.