JPS5828409A - Boring machine - Google Patents

Abstract

PURPOSE:To achieve the random cutting diameter automatically without replacing the cutter, by making the position of the cutter mounted at the tip of the boring spindle advancable/retreatable in the radial direction. CONSTITUTION:After setting the swing arm 16 at the predetermined angle, the servo-motor 31 is driven to rotate a bevel gear 30 through a gear 22, shaft 33 and a gear train thus to spin a screw rod 29. Consequently a ram 27 will move in the axial direction. The feeding amount of the ram 27 can be adjusted freely through the rotary angle control of the motor 31. Since the swing angle of the swing arm 16 is also variable, the interval between the cutters 15 can be adjusted to the predetermined length.

Description

Detailed Description of the Invention The present invention is a boring machine KJlk, a boring machine 1 equipped with a 5K polling spindle for moving a pair of rams forward and backward in the radial direction.
IKrla.

In boring machines that cut the inner surface of a workpiece by attaching a cutting cutter to the tip of a rotatably driven polling spindle, the cutting cutter was conventionally attached to the tip of the polling spindle in a fixed state. Ta. For this reason, if the cutting diameter changes, it is necessary to change the cutting cutter, or when cutting the inner surface of a casing with a small inlet diameter, the casing that has been split into one piece is processed separately and assembled after processing. Therefore, concentricity became a problem and the work efficiency was reduced.
To provide a boring machine in which the cutting radius of the cutter can be automatically changed by moving the mounting position of a cutter mounted on the tip of a polling spindle back and forth in the radial direction.

Embodiments of the present invention will be described below with reference to the drawings.

111el is a side view of an example of a boring machine according to the present invention. In Figure 0, the symbol *// is a bed.

A saddle /J is placed on this bed /l so as to be capable of reciprocating linear movement in the direction of the workpiece W, and a drive slJ is fixed to this saddle saw. The drive unit/JK is attached so that the elongated polling spindle/II is rotationally driven by the drive unit/J, and the tip of the polling spindle is equipped with a cutting cup 12 (see Fig. 1). ing.

No. JWJ is a partially enlarged sectional view of the tip end /la of the polling main shaft /41. The tip lil-tei 1 has a hollow cylindrical shape, and the polling main shaft is on the front side of this tip! Rotation of the base - Rotate a predetermined distance from the base to the left and right positions in the radial direction.
A pair of swing arms /4 are mounted so as to be pivotable about a pivot axis -1. The swing arm 14 has an elongated cylindrical shape extending in the radial direction with respect to the rotation axis @X of the polling main shaft l-tei, and the rear end thereof is
It is connected to a turning shaft which is rotatably inserted in parallel to the main shaft of the bowler cylinder. A gear /1 is fixed to the rear end of the rotating shaft 17, and a gear /f meshes with the gear /1.

I-ring main shaft / Swing arm with 41 inner diameters for rotating laminar motion! - The rotational force is transmitted to Jl6. A flange l whose outer periphery is in sliding contact with the inner wall of the polling spindle l# is provided in the middle of the rotating shaft 17.
Oil l! !
8 is formed. In addition, a bearing 11JI, which holds the K11 rotor so that the rotation axis can be slid in a linear direction, is fixed to the inner wall of the polling spindle so as to sandwich the 7 lange J/ of the rotation axis between it and the 7 cylinder. It is.

A disc spring is interposed between the bearing μ and the flange U of the pivot shaft 7. Furthermore, a car pick coupling is provided between the bearing part and the rear end surface of the swing arm/1, which connects the swing arm/4 and the polling main shaft.
Separation is possible.

The swing arm 16 has a hollow interior, and an elongated ram meter is located inside each of the swing arms 16.
It is held slidably in a direction orthogonal to 2. Ram r
At the tip of the is a cutting cutter l! but.

It is mounted so as to protrude from the swing arm 14 in the sliding direction of the ram. A threaded hole in the sliding direction is drilled in the rear part of the ram cock held in the swing arm 11!
A threaded rod cord, which is rotatably attached to the swinger 5/1, is screwed into this screw hole X. Threaded rod M
A bevel gear is fitted to the rear end.

If this bevel gear X and the gear 3J fitted to the ram drive motor J/ are connected via a through shaft 3J that handles the rotation axis and a suitable gear train, then from K, the ram drive motor The rotational force of si is the screw rod J! It has been set to 5 so that it can be transmitted. All of the ram drive mechanisms that connect these ram drive motors J/ are disposed within the polling main shaft la.

Next, the operation of this embodiment having the 51 configuration will be explained.

When swinging the swing arm 14, first supply pressure oil to the oil chamber JJK and push the 7 lunge J/ by piston action. (in the right direction), and the connection of the curvature coupling is disconnected. In this state, if you drive 4--,
The rotation axis I? due to the meshing of gears /l and /f. took a turn,
Swing arm 14 pivots around pivot axis I11.

(j) Figures 111JA to 111JD are [F] showing the state of the opening of the swing arm 16. The sJ diagram shows a state where the turning angle is 0, and in this case, Ka-/! is the boring spindle l
It is located inside the outer circumference of the temple. Therefore, cutting cannot be performed in this state, but the cutter l! Since the cutting radius of is the shortest, s of the workpiece W that has only a small
K%, through which the polling spindle slag can be inserted. Figure 3B shows the state in which the cutter has been turned 90 degrees. is drawn out from the outer circumferential circle of the polling spindle. Therefore, if the boring spindle is rotated in this state, the cutter will be cut from the rotational axis of the boring spindle/41. The inner circumferential surface can be cut with a radius up to the cutting edge of * 111! The hss diagram shows the tsr degree turning state, and the sjs diagram shows the ito degree turning state.

In this state, the cutting radius of cut #ls becomes maximum.

The swing arm 14 can thus be swiveled to any angular position, thereby making it possible to obtain any cutting radius between the maximum (.+a)1. Here is sJ
As shown in the figure, C is the distance from the rotating axis @L of the main spindle/l to the rotating axis 1t of the rotating axis/l, and C is from the rotating axis ll11 to the cutter l! The shortest distance to the cutting edge is -.

After swinging the swing arm /4 at an arbitrary angle groove according to the cutting radius, when the pressure oil is removed from the oil 11ν, the swing axis l will again move inside the hollow blowfish main shaft /41 due to the action of the disc spring U. Sliding backwards, the car pick coupling song continues,
The polling main shaft and the swing arm 16 are connected. ! l! When the polling spindle/41 is rotationally driven by the drive unit/jK, the swing arm 14 is rotated around the rotation axis giLV of the polling spindle/spindle, and the inner circumferential surface of the workpiece W can be cut with a required cutting radius. .

Next, the action of sliding the ram j in the axial direction within the swing arm 16 and feeding out the cutter/S will be explained. After turning the swing arm 16 to a predetermined angle (or with the swing arm 16 not turning at all and fixed to the snow at an angle of 00) and driving the servo JIJ, the gear J, the shaft JJ, and the appropriate bevel gear 30 through a gear train
is rotated, and the threaded rod Jt, which is busy with this, rotates on its own axis.

This rotation of the threaded rod t is converted into one-direction movement of the shaft of the ram stop through the screw hole t.

The action of feeding out the lamb koku is done. Figure 2 is a perspective view illustrating the operation of feeding out the lamb kettle. In this embodiment, the lamb kettle is fed out after the swing arm /1 has rotated to degrees. Adjustment of the feed amount of the lamb koku can be performed by controlling the rotation angle of the motor Jlf)wjA, and an arbitrary cutting radius can be obtained.In this way, according to the present invention, the rotation angle of the swing arm can be changed. By doing so, the cutting radius of the cutting cutter can be automatically changed to a required size. In addition, by sliding the ram in the axial direction, the cutting cutter with the ram tip HIKed and attached can be fed out in the radial direction of the polling spindle, and the cutting radius of the cutting cutter can be automatically changed by Km. . It was. By rotating the swing arm and moving the ram in the axial direction at the same time, the cutting radius of the cutting cutter can be changed over a wide range such as -8.

Therefore, according to the present invention, an arbitrary cutting radius can be automatically obtained without replacing the cutting cutter, and work efficiency can be greatly improved. Also, when cutting the inner surface of a workpiece such as a casing with a small opening,
It is possible to minimize the cutting radius of the cutting cutter, insert it into the workpiece through the opening, and then expand it to the required cutting radius, which improves cutting workability and reduces cutting costs. In cases such as recasing, it is possible to continuously cut the inner surface of parts with different diameters while the casing is assembled, which improves work efficiency and improves machining accuracy such as concentricity. You can improve your performance.

[Brief explanation of drawings]

Figure 1 is a side view showing an example of a boring machine based on the Q
J&- is a partially enlarged cross-sectional view of the tip of the polling spindle according to the present invention, and %, 7 and s3'DIigl are views showing the swinging state of the swing arm. 1! The figure is a diagonal diagram showing the movement of the ram. (D) /41...poling spindle, /see a...tip of boring spindle, /Jf...cutting cutter, /4.
...Swing arm. 17... Rotation axis, X... Swing arm rotation drive motor, : L3... Oil chamber, Mu... Car pick coupling, -7... Ram, X... Screw hole, 9...
Threaded rod, J/... Ram drive motor. Applicant's agent Kiyoshi Inomata (10) Figure 3A Party 3B! ! 54th Procedural Amendment Letter dated September 1, 1927, Commissioner of the Japan Patent Office Shima 1) Haruki Tono1, Indication of the case, Showa I$6, Patent Application No. 1!3616, 2, Name of the invention, Middle Edition, Board 3 , Relationship with the case of the person making the amendment Patent applicant (84!i) Toshiba Machine Co., Ltd. 7, "Detailed description of the invention" column of the specification to be amended. 8. Lines 15 to 17 of page 6 of the Specification of Contents of Amendment are corrected to the following sentence. "It can be done. Fig. 3C shows a state in which the cutter 15 has been turned by 135 degrees, and in this state, the cutting radius of the cutter 15 is at its maximum. Fig. 3D shows a state in which it has been turned by 180 degrees mv.

Claims (1)

[Scope of Claims] A polling spindle driven by 19 rotations, and a tip mK of the polling spindle of the 11 rotation shaft, which is supported in a symmetrical position to the left and right with respect to the shaft, and is capable of moving in a straight line in the radial direction of the polling spindle. I came in 41st place. A boring machine is equipped with a pair of rams that hold a cutter at the tip 114, and a claw drive mechanism that moves the rams in a linear direction.The ram drive mechanism is equipped with a threaded rod that is rotationally driven. A boring machine according to claim 1, characterized in that the ram is screwed onto the threaded rod.