JP2002052402A - End face machining apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve machining accuracy by transferring an apparatus body along the end face of a workpiece such as a steel pipe, a plate and the like, or transferring the workpiece to stabilize transferring in machining such as cutting, grinding and the like for the end face. SOLUTION: The end face machining apparatus is formed by a transfer drum 3 driven to rotate by a rotary driving motor, at least two pressing drums 4 energized toward the transfer drum 3 by a spring, and a machining tool 5 for the end face of the workpiece. A belt 7 is laid between the pressing drums 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an apparatus for cutting or grinding an end face of a steel pipe, a plate or the like.

[0002]

2. Description of the Related Art Generally, when welding is performed, a so-called beveling process for shaving a surface of a base material to be welded is performed.
By embedding the weld metal in the groove, the contact area is increased to increase the strength of the welded portion.
The groove processing is usually performed by a grinding process such as a grinder in addition to a cutting process using a milling machine or a lathe.

[0003] Further, as a device developed earlier by the present inventor, an apparatus for processing while being mounted on and transferred to an end portion of a workpiece such as a steel pipe, and a device for setting and transporting the workpiece while setting the workpiece. There is a processing machine. As disclosed in Japanese Patent Application Laid-Open No. Hei 7-51933, a work drum is rotated between a transfer drum driven by a rotary drive motor and a transfer drum urged in the direction of the transfer drum by a spring. It is constituted by a pressing body for sandwiching an object and a tool for processing an end face of the workpiece. According to this apparatus, since the processing is performed along the end portion of the workpiece by the transfer drum, the processing accuracy can be extremely increased.

[0004]

However, in an apparatus having a structure in which processing is performed while being transported along the end of a workpiece, for example, when a groove is formed around a tip end of a steel pipe, the apparatus body is used. Is transported along the circumference of the steel pipe, and there are upward and downward transport states. For this reason,
There is a problem that the transfer speed at the time of ascent and at the time of descent differ depending on the weight of the apparatus main body. For example, there is a case where a processing tool bites into the apparatus body when the apparatus body changes from an ascending state to a descending state, or a machining surface is damaged. It is considered that the cause of this is that the backlash of the transfer drum and the balance between the transfer drum and the pressing body, which sandwiches the workpiece, are lost due to the movement of the center of gravity of the apparatus main body.

[0005]

In view of the above-mentioned problems, the present inventor has accomplished the present invention as a result of further intensive studies. The feature of the present invention is that the apparatus body is connected to the end of the workpiece. An apparatus for processing an end portion of the workpiece by transporting the workpiece along a portion thereof, comprising: a transport drum that is rotationally driven by a rotary drive motor; and a transport drum that is urged toward the transport drum by a spring. And a tool for processing the end face of the workpiece, and a rolling belt is provided between the pressing bodies.

The term "workpiece" as used herein means a metal member for cutting or grinding the end face. For example, there is a case where a groove process for welding or a finishing process after fusing is performed. The workpiece to be processed by the apparatus of the present invention can be processed even when the shape of the end face thereof is linear or annular, such as a plate or a hollow pipe having a diameter of 200 mm or more, and is slightly curved or bent. .

[0007] The "transfer drum" means that the main body of the processing apparatus is transferred along the end portion of the workpiece by contacting and rotating the end portion of the workpiece, or The thing which transfers itself. The transfer drum is cylindrical or disk-shaped, and is rotationally driven by a rotational drive motor. For this reason, it is preferable to apply knurling or provide rubber or the like as an anti-slip on the outer peripheral surface. The transfer drum may be rotatably provided on a shaft provided on a main frame or the like and driven by a gear or belt by a rotation drive motor, or a rotation drive motor is built in and the rotation drive motor itself is used as a shaft. You may make it rotate. In particular, in the case of gear driving, the use of the worm gear can prevent reverse rotation and prevent backlash of the transfer drum.

[0008] The "pressing member" is a member for pressing the workpiece with the transfer drum, and is a member for sandwiching the workpiece with the transfer drum. The pressing body may be one that is supported so as to urge against the transfer drum,
For example, the transfer frame may be directly supported by a main frame, or a pressing frame may be rotatably or freely movably provided on the main frame and supported by the pressing frame. The pressing body may be any one that rolls while supporting a cylindrical or disk-shaped roller or drum in a rotatable manner. At least two of these are provided, and the transfer drum supports the workpiece at three points. Let it do. Since the pressing body is pressed against the transfer drum by urging itself or the pressing frame with a spring, a structure for adjusting the spring pressure so that the pressing force of the pressing body against the transfer drum can be adjusted. It is preferable to keep

[0009] The term "machining tool" refers to a tool for cutting or grinding an end face of a workpiece. The processing tool is provided, for example, on a processing frame, and is provided on the main frame so as to be capable of angle adjustment, up-down adjustment, and front-rear adjustment, thereby coping with a case where a groove angle is set. Examples of the end face processing tool include a cutting blade such as a milling cutter and a grinding wheel such as a grinder. For example, an electric tool in which a motor or the like is integrated may be directly attached to the processing frame.

[0010] The "rolling belt" refers to an endless belt provided between the pressing members. By providing this belt on the pressing body like a so-called caterpillar, the contact area with the workpiece increases, and the end face processing device can be accurately rolled along the workpiece. Generally, a tension roller or the like is provided between the pressing members, and the belt is stretched over the belt. As the belt, V belt,
There is no particular limitation on a flat belt, a timing belt, and the like.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the drawings.

FIG. 1 shows an embodiment of an end face processing apparatus 1 according to the present invention, which comprises a transfer drum 3 on a main frame 2 and a pressing body provided by pressing and pressing in the direction of the transfer drum 3. It comprises two pressing drums 4 and an end mill 5 which is a tool for processing an end face. A belt 7, which is a feature of the present invention, is provided between the two pressing drums 4 and is in contact with the outer peripheral surface of the steel pipe 6.

As shown in FIG. 2, the transfer drum 3 is driven to rotate by a rotation drive motor 8 provided therein. This is because the rotation driving motor 8 is connected to the main frame 2.
, And the transfer drum 3 is supported by bearings 9 so as to be rotatable around the motor 8 body. The rotation speed of the transfer drum 3 is controlled by the steel pipe 6
It is preferable that the transfer speed can be adjusted according to the material, thickness, etc. For example, a torque motor is used as the rotation drive motor 8, or a DC motor controls the current to adjust the speed.

FIG. 3 shows another embodiment of the end face processing apparatus 1 according to the present invention, in which the pressing drum 4 is driven by a motor 11. Press drum 4
, It is possible to make adjustments such as lowering the rotation speed at the time of descent compared to the time of ascending when moving along the peripheral surface of the steel pipe 6, and to stabilize the transfer of the end face processing device 1. it can. In this example, the pressing drum 4 is driven via the gear box 12 of a worm gear, and the influence of an external force applied to the pressing drum 4 is reduced.

In this embodiment, the pressing frame 10 is rotatably provided at one end of the main frame 2, and the pressing frame 10 is pressed and biased toward the main frame 2 at the other end by the spring. By providing the pressing drum 4 on the pressing frame 10, the pressing drum 4 is pressed against the transfer drum 3.

As shown in FIG. 4, the processing state of the end face processing apparatus 1 according to the present invention is set at the end of the steel pipe 6, and the transfer pipe 3 and the pressing drum 4 hold the steel pipe 6 so that the entire circumference of the pipe 6 is automatically set. Processing the end face while running. In the present invention,
In addition, the end face can be machined by rotating the steel pipe 6 as shown in FIG. This is provided with the transfer drum 3 and the pressing drum 4 protruding from the flat end contact portion 13, and the steel pipe 6 is set between them and rotated below the transfer drum 3 while rotating. End mill 5 provided
It is a structure that cuts with. The transfer drum 3 is driven in a chain (not shown) by a rotary drive motor, and each pressing drum 4 is provided in a state of being pressed along a groove 14 by a spring. Further, this processing apparatus 1 can easily set and process even a plate-like iron plate 15 as shown by a chain line in the figure.

[0017]

As described above, the end face processing apparatus according to the present invention is an apparatus for processing an end portion of a workpiece by transferring an apparatus main body along the edge portion of the workpiece. A transfer drum rotatably driven by a rotary drive motor, at least two pressing members urged in the direction of the transfer drum by a spring to sandwich the work between the transfer drum, and end face processing of the work And a rolling belt is laid between the pressing members, so that the contact area of the pressing members holding the workpiece is increased, and the effect that the processing is stabilized and the accuracy is improved is achieved. is there.

In particular, it is possible to prevent the transfer state from being deviated when the processing apparatus body is switched between ascending and descending, as in the case of processing a workpiece such as a steel pipe, so that the processing surface becomes uniform and the processing accuracy is significantly increased. be able to. Further, in the end face processing apparatus according to the present invention, even when the apparatus body is fixed and the workpiece is transferred to perform the processing, the transfer of the workpiece is stabilized and the processing accuracy is ensured by providing the belt on the pressing body. Has an extremely useful effect in practical use, for example, it is possible to improve

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an embodiment of an end face processing apparatus according to the present invention.

FIG. 2 is a sectional view of a transfer drum of the end face processing device shown in FIG.

FIG. 3 is a bottom view showing another example of the embodiment of the end face processing apparatus according to the present invention.

FIG. 4 is a side view showing a processing state of the end face processing apparatus according to the present invention.

FIG. 5 is a front view showing still another example of the embodiment of the end face processing apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 End surface processing apparatus 2 Main frame 3 Transfer drum 4 Press drum 5 End mill 6 Steel pipe 7 Stabilizer 8 Rotation drive motor 9 Bearing 10 Press frame 11 Motor 12 Gear box 13 End face contact part 14 Groove 15 Iron plate

Claims (1)

[Claims] 1. An apparatus for processing an end portion of a workpiece by transporting an apparatus body along an edge portion of the workpiece, a transfer drum rotatably driven by a rotation driving motor, At least 2 which is urged in the direction of the transfer drum by a spring and sandwiches the workpiece with the transfer drum;
An end face processing apparatus comprising: one pressing body and a tool for processing an end face of the workpiece, wherein a rolling belt is provided between the pressing bodies.