JPH0329067Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a steel pipe end processing machine suitable for processing the inner and outer end surfaces of a fixed type steel pipe.

[Conventional technology]

When processing a steel pipe with a steel pipe processing machine having a die head, in the prior art, the outer periphery, inner periphery and end face could not be processed using a single processing machine, and these processes were carried out separately. In other words, the inner periphery and end face of a steel pipe are machined using a tool fixed to a cutter holder that engages with the inner periphery, and then the inner periphery of the processed steel pipe is supported by an inner support using another processing machine. ,
Generally, the outer periphery was machined using a tool fixed to the die head body. Therefore, it takes time to change setups, etc., and product quality is not stable.
Process management was also complicated, and work efficiency could not be improved.

[Problem that the invention attempts to solve]

This invention solves the above-mentioned drawbacks, and processes the inner and outer end faces of steel pipes using a single processing machine, eliminating the hassle of setup changes and improving work efficiency, as well as improving product quality. The aim is to provide the opportunity.

[Means for solving problems]

A means for solving the above-mentioned drawbacks in the present invention is to provide a steel pipe end processing machine that processes the inner and outer end surfaces of a fixed type steel pipe using a tool held in a die head provided at the tip of the main spindle. A reciprocating member that is movable and rotatably supported along the axial direction of the steel pipe, a cutter holder provided at the tip of a spindle supported inside the retractable member, and a cutter holder that is movable along the radial direction of the cutter holder. a presser element that is supported and removably engaged with the inner periphery of the steel pipe; an opening/closing means for moving the presser in the radial direction; The clutch has clutch teeth that engage with each other, is supported in the spindle so as to be slidable along the axial direction of the main shaft, and is restrained in the rotational direction, and when the clutch is disengaged, the presser comes into contact with the inner periphery of the steel pipe. The clutch member is configured to move in the direction of opening and opening as much as possible, and the transmission member is configured to move the clutch member in the opening/closing direction of the main shaft axis.

[Effect]

The inner periphery and end face of a fixed type steel pipe are processed using a tool that is fixed to the cutter holder. In this case, the clutch member is in a closed state, and the pusher is spaced apart from the inner periphery of the steel pipe. When machining the outer periphery of a steel pipe, the clutch member is opened, and the pusher is brought into contact with the inner periphery of the steel pipe via the opening/closing means, and the cutter holder functions as an inner support to support the steel pipe. Machining the outer periphery using a tool.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows the configuration of this embodiment. First, an overview of the overall structure of the machine will be explained.

The main shaft 11 has a bearing 1 mounted on the housing 12 of the main body of the machine.
3. Die head bodies 15, 15A are supported on the main shaft 11 by a positioning key 14, and a sliding bearing 16 (fixed to the main shaft 11)
The sleeve 17 is supported so as to be slidable in the axial direction (coinciding with the axis of the steel pipe 10) as shown by arrow A-A. A disk 18 is fixed to the tip of the sleeve 17, and a wedge-shaped member 19 and a guide bush 20 are respectively fixed to the disk 18. A guide bar 21 supported along the axial direction within the die head body 15A is slidably inserted into the guide bush 20.

On the other hand, a rotating sleeve 22 that can rotate together with the main shaft 11 is pivotally supported within the sleeve 17, and a cylindrical cover 24 is connected to the rotating sleeve 22 via an intermediate member 23.
are concatenated. Note that the cylindrical cover 24 is also fixed to the die head body 15A. Cylindrical cover 24
A shaft 25 that bulges out in the radial direction is provided on the outer periphery of the holder 26, and the shaft 25 is slidably inserted into a guide hole 27 formed in the holder 26. The holder 26 also has tool tips 28 and 2 for machining the outer periphery of the steel pipe 10.
A tool holder 30 that holds a tool holder 9 is fixed, and a wedge-shaped portion 3 is disposed facing the wedge-shaped member 19.
1 is integrally formed. A spring 32 is installed inside the guide hole 27 of the holder 26, and the holder 2
6 in the direction of expanding in the radial direction (in the direction away from the axis). Coolant from the coolant passage 33 and the like is supplied to the outside through holes in the holder 26. A slide bearing 34 is interposed between the wedge-shaped member 19 and the wedge portion 31 on the holder 26 side, and a slide bearing 35 is also interposed between the wedge-shaped member 19 and the inner wall of the die head body 15A.

With the above structure, when the main shaft 11 is rotated, the die head bodies 15, 15A, holder 26, tool holder 30, rotating sleeve 22, disk 18, etc. all rotate, and the sleeve 17 moves the disk 18 along the guide bar 21 parallel to the main shaft. When the holder 2 is moved (advanced), the wedge-shaped member 19 presses the wedge-shaped portion 31 in the radial direction via the slide bearing 34.
6 in the axial direction. This causes the tool tips 28 and 29 of the tool holder 30 to come into contact with the outer periphery of the steel pipe 10. When the disk 18 is retracted, each member moves in the opposite direction, and the tool tips 28 and 29 are separated from the steel pipe 10. Note that the cover 36 disposed near the tool holder 30 is for preventing coolant from scattering from inside.

Next, the main parts of this embodiment will be explained.

The advancing/retracting member 1 is rotatably supported within the rotary sleeve 22 via a bush 101, and is supported so as to be movable in the direction AA by means not clearly shown in the drawings. The reciprocating member 1 enters into the cylindrical cover 24 and is arranged along the axial direction to a position near the tool holder 30. A cylindrical member 102 is fitted into the interior of the reciprocating member 1, and clutch teeth 103 are formed on one end surface (the end surface on the steel pipe 10 side) of the cylindrical member 102. Also, bearings 104, 1 are provided on the inner periphery of the tip of the reciprocating member 1.
04, a spacer 105, etc. are respectively fitted, and these members are held by a cover 106.

The cutter holder 2 is arranged to protrude toward the steel pipe 10 so as to engage with the inner peripheral end of the steel pipe 10, and a flange portion 201 at the rear end is removably fixed to the spindle 3. The spindle 3 has a bearing 104,
The nut 30 is pivotally supported on the reciprocating member 1 via the
The movement in the axial direction is restricted by the 1st class.

As shown in FIG. 2 and FIG. 3 A and B, the front end of the cutter holder 2 has tool tips 202, 203, 204 for machining the inner circumference and end of the steel pipe 10.
In addition to being fixed, there is also a square through hole 205 and an adapter 501 that slidably hold a presser 4, which will be described later.
A guide hole 206 which is formed in a shape corresponding to the shape and slidably supports the same, and a guide hole 207 into which the core metal 502 is inserted are respectively bored.

The presser 4 is formed from a plurality of pieces (three pieces in this example) of piece members, and is formed from a square through hole 2 of the cutter holder 2.
05 so as to be slidable along the radial direction of the steel pipe 10, and its outer peripheral side 401 is formed into a conical shape so as to abut and engage with a tapered hole at the end of the steel pipe 10. Further, an inclined surface 402 that matches the taper of the core metal 502 is formed on the inner peripheral side of the presser 4 . Moreover, a groove 501B is provided at the tip of the three sets of pressers 4, and an inclined surface 501A is formed on the axis side of the groove. The adapter 501 has a protrusion formed with an inclined surface 403 that matches the inclined surface 501B of the groove on the inner side toward the presser 4 so as to face and engage with the groove 501B of the presser 4. It is fixed to the tip of 502 with a bolt 503. Further, the adapter 501 has a Y-shape as shown in FIG. 2, and is accommodated in the guide hole 206 having the same shape as described above. The core bar 502 has a tapered portion 502A at its tip.
The tapered portion engages with the inclined surface 402 inside the presser element 4, and the movement of the core bar 502 in the axial direction causes the three sets of pressers 4 to move in the radial direction. That is, with the above structure, the core metal 502 in FIG.
When the adapter 501 is moved to the left (forward direction) in the figure, the adapter 501 disengages from the presser 4 and the tapered portion 502A of the core 502 comes into contact with the inclined surface 402 on the inner circumference of the presser 4, causing the presser to be pressed. The child 4 is moved in the radial direction so as to come into contact with the inner circumferential tapered portion of the end surface of the steel pipe 10. Conversely, when the core metal 502 is retreated, the adapter 50
1 is locked in the groove at the tip of the presser 4, and is brought to the axial center side along the taper to release the contact with the steel pipe 10. Note that when the presser 4 is lowered toward the center, the cutting edges of the tool tips 202, 203, and 204 are arranged at positions that protrude from the presser.

Next, the clutch member 6 will be explained.

The small diameter outer peripheral portion of the clutch member 6 is loosely fitted into the hole of the spindle 3 so as to be movable forward and backward, and the large diameter outer diameter portion is inserted and supported within the spacer 105. spindle 3
A spline is formed inside the clutch member 6 in the axial direction, and the spline engages with the outer peripheral spline of the intermediate member 603 fixed to the tip of the clutch member 6 with a bolt 601 to enable sliding along the axial direction and restrain rotation. be supported. Further, a core metal 502 is fixed to the front end side with a bolt 602. At the rear end of the clutch member 6, a clutch tooth 103 carved at the tip of the cylindrical member 102 and a clutch tooth 604 carved at the rear of the clutch member 6 mesh with each other. Note that the clutch member 6 has clutch teeth 103, 6.
When the clutch teeth 103 and 604 are in mesh with each other, the core bar 502 is formed so as to move in the direction of pressing the pusher 4 against the inner circumference of the steel pipe 10 when the clutch teeth 103 and 604 are in mesh with each other. Presser 4
moves from the cutter holder 2 in the axial direction, and only the tool tip 202 comes to protrude from the presser 4.

The transmission member 7 is formed of a tubular member that penetrates inside the cylindrical member 102, and the front end side of the transmission member 7 is provided with a thrust bearing 70 that receives an axial thrust from the clutch member 6.
1,702 by a nut 703. The transmission member 7 is configured to move the clutch member 6 along the axial direction by driving means (not shown).

Next, the operation of this embodiment will be explained.

First, processing of the inner periphery and end face of the fixed steel pipe 10 will be explained.

In order to process the inner periphery and end face of the steel pipe, use the core metal 50.
2 must be retracted in the axial direction and the presser 4 must be retracted. The clutch member 6, which has been in the forward position, moves rearward so that the clutch teeth 604 of the clutch member 6 engage with the clutch teeth 103 of the cylindrical member 102. As mentioned above, when the clutch member 6 is in the connected state, the outer periphery of the presser 4 is close to the tool tip 2.
02 etc., it is arranged in a retracted state in the cutter holder 2. When the clutch teeth mesh with each other, the clutch member 6 rotates synchronously with the reciprocating member 1 and the main shaft 11. Therefore, by moving the reciprocating member 1 to an appropriate position, the end face and inner surface of the steel pipe 10 are processed by the tool tips 202, 203, and 204.

Next, processing of the outer surface of the steel pipe 10 will be explained.

In this case, the transmission member 7 is moved forward to release the clutch connection of the clutch member 6. As a result, the taper 502A of the core metal 502 of the opening/closing means 5
The pusher 4 is pressed radially outward, and the outer circumferential side 401 is pressed against the inner circumferential surface of the steel pipe 10.
Press them together. Therefore, the steel pipe 10 is supported by the cutter holder 2, and the cutter holder 2 functions as an inner support. In this state, even if the main shaft 11 and the advancing/retracting member 1 rotate, this rotation will be caused by the clutch member 6
The cutter holder 2 and the spindle 3 are held in a state of being pivotally supported within the reciprocating member 1 without being transmitted.
On the other hand, due to the rotation of the main shaft 11, the die head body 1
The tool holder 30 held by the steel pipes 5 and 15A rotates, and the tool tips 28 and 29 come into contact with the outer surface of the steel pipe 10. The cutting feed of the tool tips 28, 29, etc. is performed by the engagement between the wedge-shaped member 19 and the wedge-shaped portion 31 as described above, and the feed in the axial direction is performed by the axial feed of the reciprocating member 1 within the main shaft 1. When the machining is completed, the reciprocating member 1 moves back relative to the main shaft 11 by the amount of the feed movement and returns to the original support position.

Through the above-described repeated operations, the inner and outer end faces of the steel pipe 10 can be efficiently machined using a single processing rod, and a product of stable quality can be obtained without the need for setup changes.

If the dimensions of the steel pipe 10 change, the cutter holder 2 may be removed from the spindle 3 and replaced with another cutter holder 2.

In this embodiment, the spindle 3 and the cutter holder 2 are separate bodies, but if the dimensions of the steel pipe 10 are constant, they may be formed into an integral structure.
Furthermore, although the opening/closing means 5, the core bar 502, and the clutch member 6 are shown as separate bodies, they may be of an integral structure. Further, the mechanism for opening and closing the presser 4 using the clutch member 6 is not limited to that of this embodiment.

[Effect of idea]

As is clear from the above description, the present invention provides the following effects.

A: The inner and outer end surfaces of the steel pipe are finished using a single processing machine, improving work efficiency.

B. The cutter holder for processing the inner end surface can be used as is as an inner support for the steel pipe, making it possible to stably support the steel pipe, perform high-quality outer peripheral processing, and improve concentricity.

C. Automatic machining of internal and external end faces is possible in a short time with almost no setup changes.

D. Can easily respond to changes in steel pipe dimensions.

E The proposal can be implemented with almost no changes to the existing structure.

[Brief explanation of drawings]

FIG. 1 is an axial sectional view showing the overall structure of an embodiment of the present invention, FIG. 2 is a front view showing the structure around the cutter holder of the embodiment, and FIG. FIG. 3B is a view taken along the arrow in FIG. 1...Movement member, 2...Cut holder, 3...
Spindle, 4... Presser, 5... Opening/closing means, 6
...Clutch member, 7...Transmission member, 10...Steel pipe, 11...Main shaft, 12...Housing, 14...
...Positioning key, 15, 15A...Die head body, 17...Sleeve, 18...Disk, 1
9...Wedge-shaped member, 20...Guide bush, 21
... Guide bar, 22 ... Rotating sleeve, 23,
603... Intermediate member, 24... Cylindrical cover, 2
5... shaft, 26... holder, 27... guide hole,
28, 29, 202, 203, 204... Tool tip, 30... Tool holder, 31... Wedge-shaped member,
32...Spring, 33...Coolant passage, 3
4, 35...Slide bearing, 36...Cover, 1
01... Bush, 102... Cylindrical member, 10
3,604...Clutch tooth, 104...Bearing, 105...Spacer, 106...Cover, 2
01...Flange part, 205...Square through hole, 2
06,207... Guide hole, 301... Natsu, 4
01... Outer circumferential side, 403... Inclined surface, 404...
Guide surface, 501...adapter, 501A...slanted surface, 501B...concave groove, 502...core bar, 50
2A... Taper part, 503, 601, 602...
Bolt, 701, 702... Thrust bearing.

Claims (1)

[Scope of utility model registration request] A steel pipe end processing machine that processes the inner and outer end surfaces of a fixed steel pipe using a tool held in a die head provided at the tip of the main spindle, which is movable in the main spindle along the axial direction of the steel pipe and rotatable. a reciprocating member supported by the reciprocating member, a cutter holder provided at the tip of a spindle supported inside the reciprocating member, and a cutter holder supported movably in the radial direction of the cutter holder and removably engaged with the inner periphery of the steel pipe. a presser to be fitted, an opening/closing means for moving the presser in the radial direction, and a clutch tooth that engages with the opening/closing means and meshes with the reciprocating member in the direction of the main shaft axis; a clutch member that is supported so as to be slidable along the axis of the main shaft and restrained in the rotational direction, and configured to move the presser in a direction in which it expands so as to come into contact with the inner periphery of the steel pipe when the clutch is disengaged; and a transmission member for moving the clutch member in the opening/closing direction of the main shaft axis.