JPH02256404A - Drilling machine with automatic grooving cutter - Google Patents

Abstract

PURPOSE:To achieve reduced overall size by moving the inner peripheral surface of a work piece in a keyway direction by means of an up-and-down handle of a drilling machine, and moving a cutter in a keyway-depth direction through intermittent rotation of a step motor. CONSTITUTION:The anti-cutting edge side 48 of an inner groove cutting device 51 is held by a chuck portion 47 which is raised and lowered by means of an up-and-down handle. An external cylinder 41 is protrusively provided on the cylinder portion 60 of the device 51, and a moving body 58, in which is fixedly mounted an advance-retract bar 42 that advances and retracts within the external cylinder 41, is provided internally in the cylinder portion 60. A retaining hole 62 is drilled in a direction at right angles to the axial center at the tip side of the advance-retract bar 42, and a cutter 44 is held in place by a cutter retainer 65 within the retaining hole 62. An area provided on which the cutter 44 and the advance-retract bar 42 are brought into contact with each other is formed in an inclined surface 64. Intermittent rotation of a step motor 40 causes the moving body 58 to advance via an output shaft 53, a pinion 55 and a rack 56, which is turn advances the advance-retract bar 42, and forces the cutter 44 to protrude out of the retaining hole 62 on account of the inclined surface 64. This arrangement facilitates keyway cutting in ID of a work piece and ensures reduced machine size and automated operation.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an automatic groove cutting machine and a drilling machine, particularly an automatic groove cutting machine for machining a keyway on the inner peripheral surface of a workpiece, spline processing on the inner peripheral surface, etc. This relates to a cutting machine and drilling machine.

[Prior Art] Conventionally, keyway machining on the inner circumferential surface of a workpiece or inner groove cutting machining such as spline machining on the inner diameter has been performed.

In such machining, in addition to keyway machining or spline machining, the cutter moves in the axial direction of the inner peripheral surface of the workpiece, and the cutter moves in the depth direction of the keyway or spline for machining. Two operations are required.

Conventionally, such a cutter is generally attached to a milling machine, etc., and processing is performed by controlling the forward and backward movement of the milling cutter in the axial direction of the workpiece and the movement of the cutter in the depth direction. Ta.

However, in such conventional inner diameter keyway machining and inner diameter spline machining, during the movement of the milling machine, etc., there are two movements: the movement of the keyway in the processing direction, and the movement of the keyway, etc. in the depth direction. The problem was that it required automatic control, which required large equipment.

Furthermore, because the cutter itself had to be moved in the depth direction of the keyway or spline, it was not possible to increase the size of the cutter itself, and if the inner diameter was small, machining was required at the bottom. .

Therefore, in the present invention, movement in the direction of the keyway or spline is performed by operating the lift handle of the drill press to perform inner groove cutting such as keyway or spline processing on the inner peripheral surface of the workpiece. By forming the cutter so that the movement of the cutter in the depth direction for spline processing etc. is performed by the operation of a step motor, it is possible to perform inner groove processing with a drill press, and the inner groove cutting processing is facilitated. We aim to downsize the cutting equipment,
Furthermore, the object is to provide an automatic grooving machine/drilling machine which can be miniaturized as a whole by forming the cutter blade so as to protrude sequentially as it is processed, and which is also capable of machining small-diameter inner circumferential surfaces. do.

[Means for Solving the Problems] In order to solve such technical problems, the present invention comprises a drilling machine and an inner groove cutting device that is attached to the drilling machine and used, of which the WI4 cutting device is used. is a step motor operated by pneumatic pressure, a reciprocating rod that moves forward and backward in the outer cylinder by the operation of this step motor, and a blade portion that can protrude in a direction perpendicular to the forward and backward direction of the retractable rod. The side opposite to the blade of the inner groove cutting device is fixed to a chuck provided on the main shaft of the drilling machine, and the inner groove cutting device is moved up and down relative to the workpiece by operating the lifting handle of the drilling machine. In addition, the cutter having a protruding blade portion can be used to cut the inner groove of the workpiece by the operation of the step motor.

[Example] Hereinafter, based on the example shown in the attached drawings, Paul I! 11
45 and an inner groove cutting device 51 will be described in detail.

As shown in FIGS. 1 and 2, the inner groove cutting device N51 according to the present embodiment includes a step motor 40 operated by air pressure, and a reciprocating rod 42 that moves back and forth within the outer cylinder by the operation of the step motor 40. and a cutter 44 whose blade portion 43 can protrude in a direction perpendicular to the direction of movement of the movement rod 42 as the movement of the movement rod 42 moves back and forth.

The outer cylinder 41 is provided to protrude from a cylinder portion 60 fixed to the frame 52. As shown in FIG.
A movable body 58 on which is planted is installed inside. A spring 59 is loosely installed between the base end of the outer cylinder 41 and the movable body 58 on the proximal end side of the advance/retreat rod 42 and is placed in pressure contact with the movable body 58 .

Further, a holding hole 62 is bored in the distal end side of the advancing/retracting rod 42 in a direction perpendicular to the axis of the advancing/retracting rod 42, and a cutter 44 is disposed within this holding hole 62. In addition, the advance/retreat rod 42
An inclined portion 64 is provided on the holding hole 62 side.

On the other hand, the cutter 44 disposed in the holding hole 62 has a blade portion 43 on one side and a sloped portion 64 of the advancing/retracting rod 42 on the other side.
A contact portion 63 that contacts the blade portion 4 is provided.
On the third side, a blade lever 65 fixed to the outer cylinder 41 is pressed against the inside of the holding hole 62 .

Therefore, until the collision part 63 of the cutter 44 collides with the inclined part 64 of the advancing/retracting rod 42.

It is pressed into the holding hole 62 by a blade lever 65. When the advancing/retracting rod 42 is moved forward in this state, the inclined portion 64 of the advancing/retracting rod 42 will move against the collision portion 6 of the cutter 44.
3, the cutter 44 resists the pressing force of the blade lever 65, and the blade portion 43 is configured to protrude outward from the holding hole 62 in a direction perpendicular to the axial direction of the advancing/retracting rod 42. .

On the other hand, the movable body 58 is disposed within a gap 61 provided in the cylinder portion 60 so as to be movable in the axial direction of the advancing/retracting rod 42 . In addition, a key 69 disposed in the axial direction of the forward/backward rod 42 is fitted between the moving body 58 and the frame 52, and the moving body 58 moves the forward/backward rod 42 along the key 69. While moving in the axial direction, the reciprocating rod 42 is arranged so as to be unable to rotate in the circumferential direction.

The movable body 58 is configured to be movable by the operation of the step motor 40 fixed to the frame 52.

That is, an output gear 53 provided on the step motor 40 is engaged with a transmission gear 54 having a larger diameter, and a shaft portion 57 provided on this transmission gear 54 is engaged with the output gear 53 .
A pinion gear 55 that interlocks with the rack 5 provided on the movable body 58 is provided.
It is arranged so as to mesh with 6. Therefore, when the step motor 40 operates and outputs intermittent rotational motion to the output gear 53, the intermittent rotational motion is transmitted to the transmission gear 54 meshing with the output gear 53, and this transmission gear 54 The signal is transmitted to the pinion gear 55 provided on the shaft portion 57 via the shaft portion 57 . In the rack 56 that meshes with the pinion gear 55, the intermittent rotational motion is converted into reciprocating motion in the length direction of the movable body 58. As a result, when the movable body 58 moves forward in the left direction in FIG. It is the one that makes it stick out.

On the other hand, the step motor 40 is operated by air pressure and is configured as follows.

In the step motor 40 according to the present embodiment, a claw to which the piston is attached moves due to the reciprocating motion of the piston using air pressure, and the claw moves the seven spindles intermittently. A pair is used, and a lever is used to switch both claws so that only one of the claws rotates the spindle. Therefore, the rotation direction of the spindle can also be selected by selecting it by operating the switching lever.

That is, as shown in FIGS. 3 to 6, in this embodiment, 1 is a body, 2 is a front cover 2 screwed to the open end of the body 1, and has a communication port 2a and two cylinder handles. The attachment is mouth 2b (2b).

It is formed. 3 is a spring tube screwed to the rear wall of the body l. Reference numeral 4 denotes a piston movably loaded into the body l, and a pressure receiving recess 4a is formed in the front wall.Normally, the piston is loaded into the spring cylinder 3 and pressed by the return spring 5 to press against the front lid 2. By intermittently applying air pressure to the pressure-receiving recess 4a from the outside through the flow port 2a, the reciprocating movement is performed back and forth.

Hole 4b is created by cutting out a large portion approximately in the center of cylinder 4.
A roller housing 7, a rotor 9, and a driven gear 12 are sequentially positioned on a spindle 6 passing through this hole 4b. The roller housing 7 and the rotor 9 are rotatable relative to the spindle 6, but the passive gear 1
2, its post 12a is fixed to the spindle 6 by a pin 12b.

The roller housing 7 has an annular groove 7a formed in its upper outer periphery, and a plurality of rollers 8 (six in the figure) arranged at equal intervals in the circumferential direction are installed in this annular groove 7a.
The protrusion 9a of the roller 9 is inserted into a small hole drilled at the lower end of the lower post 7b, and the roller housing 7 and rotor 9 are assembled.
and are integrally engaged. As shown in FIGS. 7 to 9, the rotor 9 has a plurality of vertical grooves 10 (six in the figure) at equal intervals on its smooth outer circumferential surface, and a common vertical groove 10 is formed in the lower half of the rotor 9. A set of two feed blades 11 having a blade portion are provided for each vertical groove 10, and the remaining circumferential surface is provided with missing blades.

The lower part of the roller housing 7 and the rotor 9 following it
, the passive gear 12 is exposed to the outside from the bottom hole la of the body l, and the opening portion is connected to the cover plate 14 with a screw 15.
The roller housing 7 is fixed to the bottom plate of the outer cylinder 13 to prevent the roller housing 7 from protruding outward, and the entire exposed portion is fixed to the outer cylinder 13.
It is covered so that only the tip of the spindle 6 can protrude.

As shown in FIGS. 7 to 11, 16 is a plurality of gears (in the figure, 3
) pinion, outer cylinder! It is loaded by hollowing out the wall of 3, and fitting the collar 17.
3, it is rotatably supported. As shown in FIG. 7, the grooves 16 are arranged so as to mesh with every other longitudinal groove 10 of the rotor 9, and the upper half of the grooves 16 are provided with cut-out portions 16a every other groove.
is formed. The upper part of the spindle 6 is the sleeve 17
The lower part is rotatably supported by the earthen wall of the body l via a, and by the outer cylinder 13 via the post 12a and sleeve 17a of the passive gear 12, respectively.

18. 18 is a vertical shaft installed in the hole 4a of the spindle 4 at a position perpendicular to the moving direction of the spindle 4. Two claw pieces 19a, 19b are fitted into this, and the claw pieces 19a, 19 are inserted into the vertical shaft.
The tip of b is made to face rollers 8a and 8b located on the left and right of the front among the rollers 8 of the roller housing 7. 2
0 is a rotating shaft located in the middle of the vertical axis 8.8 and supported in the hole 4b, 21 is a switching lever fixed to the rotating shaft 20, and 22.22 is a rotating shaft between the claw pieces 19a, 19b and the rotating shaft 20. The hook in between is the tension spring we passed, and 23°23 is the claw piece 19a.
, 19b are stop pins protruding from each other, and the claw pieces 19
a, 19b always tend to close inward due to the tension springs 22, 22, but the stop pins 23, 23 are stopped by the switching lever 21, so that the claw pieces 19a
, 19b is in the proper posture, that is, the toe is the roller 8a,
8b. 25a and 25b are the single acting cylinders 26a and 28b are the single acting cylinders 2 that are attached to the opening 2b (2b).
5a.

The pusher is moved forward and backward by the operation of the cylinder 25b, and its tip is brought into contact with both ends of the switching lever 21. In FIG. and tilt the switching lever 12 along with the rotating shaft 20 counterclockwise by a predetermined angle. As a result, the stop pin 23 of the claw piece 19b is pushed by the switching lever 21, and the vertical shaft 18
It opens outward around the axis, and the tip part is removed from the relative position with the roller 8b. When the piston 4 moves forward to the right in this state, the claw piece 19a feeds the roller 8a by one pitch, and the roller housing 7 rotates clockwise. After that, it is pushed by the return spring and moves back to the left mold, but in the middle of the movement, the claw piece 19a
When the inner slope comes into contact with the next roller 8 newly located at position 8a, it opens outward against the tension spring 2 and returns to its original state after getting over it.

To turn the roller housing 7 counterclockwise, supply air pressure to the other single-acting cylinder 25a, tilt the switching lever 21 clockwise, open the claw pieces 19a outward, and open the other claw piece 19a. It is combined with the roller 8b. That is, by selectively supplying air pressure to either one of the single-acting cylinders 25a, 25b, the rotation direction of the roller housing 7 and the spindle 6 can be arbitrarily selected.

The apparatus of the present invention configured as described above performs the following operations to drive the spindle 6 intermittently to rotate.

First, a pulse of air pressure is supplied through the flow port 2a, and the piston 4 reciprocates, so that the claw piece 19a or the claw piece 19b sends the roller 8 one pitch at a time, and the roller housing 7 and the roller engaged therewith are moved. 9 rotates.

Next, due to the rotation of the roller 9, each time the feed dog 11 passes the meshing point with the pinion 16, the pinion 16 is rotated twice.
Intermittent rotation drive by advancing the teeth.

The intermittent rotational movement of the pinion 16 is caused by the passive gear 12. And then, it is transmitted to the spindle 6 to which the driven gear 12 is fixed. This intermittently rotating spindle 6 is used as a driving shaft for mechanical devices in various fields.

Note that when the pinion 16 is located between the feed teeth 11 and 11 (FIG. 11), the top tooth tip of the pinion 16 is aligned with the vertical groove 1.
When the pinion 16 is pulled out from zero and comes into contact with the outer peripheral surface of the rotating rotor 9 at the toothless portion 16a, the rotation of the pinion 16 is prevented until the next feed dog 11 passes (Fig. 10). , the passive gear 12 meshing with the pinion 16 does not rotate due to inertia or other external factors, and the spindle 6 is precisely driven to rotate intermittently.

In addition, in order to switch the rotation direction of the spindle 6,
By selectively supplying air pressure to either one of the single-acting cylinders 25a, 25b, the inclination of the switching lever 21 is changed, and one of the pair of claw pieces 19a, 19b is
Since the claw piece 19 that contacts the roller 8 is changed, the direction of rotation of the spindle 6 can be changed even if the piston 4 is moved in the same manner.

Next, a case will be described in which the inner groove of the workpiece 50 is cut using the automatic groove cutting machine drilling machine 80 according to the present embodiment.

First, as shown in FIG. 1, the workpiece 50 is placed on the pole g1.
Using the chuck 70 provided on the table 71 of 45, move the table so that the axis of the advance/retreat rod 42 installed in the outer cylinder 41 of the inner groove cutting device 51 coincides with the axis of the workpiece. 71. Then, connect the air to the air hose 6
6°67.68 to the step motor 40 to operate the step motor 40, and move the blade portion 43 of the cutter 44 from the holding hole 62 in the axial direction of the advance/retreat rod 42 by an amount corresponding to the initial cutting amount. Protrude in a right angle direction. in this case,
As described above, the operation of the step motor 40 causes the output side gear 63 provided in the step motor 40 to output intermittent rotational movement, and this intermittent rotational movement is transmitted to the pinion gear via the transmission gear 54 that meshes with the output side gear 53. 55. A rack 56 provided on the moving body 58
is meshed with this pinion gear 55, so the intermittent rotational movement of the pinion gear 55 is controlled by the rack 56.
This is converted into a reciprocating motion in the axial direction of the second axis, and the movable body 58 moves toward the tip of the reciprocating rod 42.

As the forward/backward rod 42 moves in the direction of the cutter 44, the inclined portion 64 provided at the tip of the forward/backward rod 42 presses the contact portion 63 of the cutter 44, and the cutter 44 moves toward the blade portion 65.
, and is pushed in a direction perpendicular to the axial direction of the reciprocating rod 42 (in the present embodiment, in a downward direction in FIG. 2). As a result, the blade portion 43 of the retaining hole 6
2 in a direction perpendicular to the axial direction of the reciprocating rod 42.

Therefore, in this state, the lifting handle 49 provided on the pole g145 is operated to lower the inner groove cutting device 51 in the direction of the workpiece 50 fixed on the table 71. It performs kerf processing on the surface or spline processing on the inner circumferential surface.

When performing inner groove machining such as kerf machining on the inner circumference or spline machining on the inner circumference, the depth of the inner groove for machining the blade portion 43 in sequence is determined while machining the workpiece 50. It is necessary to send it in the opposite direction.

To extend the blade portion 43 in the direction of the inner groove for performing such machining, the step motor 40 is rotated by a predetermined amount or by a predetermined angle, and the movable body 58 is moved by a predetermined distance. This is done by further protruding from the holding hole 62 by a predetermined distance.

In the inner groove cutting device 51 according to this embodiment, feeding the blade portion 43 of the cutter 44 in the depth direction of the keyway or spline for machining is simply carried out by the step motor 40. This is convenient because it can be done simply by rotating the by a predetermined amount. Further, by programming the feed amount of the blade portion 43 in advance by rotating the step motor 40, the machining itself can be program-controlled.

Furthermore, when necessary, for example, when moving the inner groove cutting device W151 in the direction of the workpiece 50 to perform cutting, the blade portion 43 is projected from the holding hole 62, and conversely, the inner groove cutting device W151 is moved in the direction of the workpiece 50. When retracting the cutter 51 from the workpiece 50, the blade part 43 can be controlled to be housed inside the holding hole 62. In this case, the cutter 44
Damage to the blade portion 43 can be prevented.

Furthermore, in the inner groove cutting device 51 according to this embodiment,
Since cutting is performed by protruding the blade portion 43 of the cutter 44 from the holding hole 62 of the outer cylinder 41, any material to be processed has a cylindrical portion with an inner diameter into which the outer cylinder 41 can be inserted. It is capable of cutting internal grooves such as keyway machining or internal spline machining. Therefore, it can be easily applied to machining workpieces with small inner diameters.

[Effects of the Invention] As explained above, in the present invention, movement in the keyway or spline direction for cutting the keyway or inner groove such as spline processing on the inner peripheral surface of the workpiece is , by operating the lift handle of the drilling machine, keyway,
Alternatively, by making the cutter move in the depth direction of the inner groove for spline processing etc. by rotation of a step motor, these processes can be facilitated, and furthermore, the blade of the cutter can be made to protrude sequentially as the process is performed. By forming it in such a way that it is possible to miniaturize the entire structure and perform inner diameter machining of small diameters.

Furthermore, since the automatic grooving machine and drilling machine according to the present invention is used by being attached to a widely used drilling machine, it can be easily and easily used, unlike the conventional case where a milling machine or lathe is used. You can easily cut the inner groove of the workpiece.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view of an automatic grooving machine and drilling machine according to the present invention, and FIG.
The figure is a sectional view taken along the line DD in FIG. 1. FIG. 3 is a front view showing one embodiment of a step motor used in the present invention, FIG. 4 is a side view of the same, FIG. 5 is a longitudinal cross-sectional view of the same, and FIG. Line sectional view, Figure 7 is same C
-C line sectional view, Fig. 8 is a C-C line sectional view, Fig. 9 is a front view of main parts centering on the spindle, Fig. 1O and 11
The figure is a plan view showing the relationship between the rotor and the binion. 1...Body la...Bottom hole 2...Front cover 2b...Cylinder mounting port 3...Spring tube 4...Piston 4a...Pressure receiving recess
4b...Hole 5...Return spring 6...
・Spindle 7...Roller housing 8...Roller lO...Vertical groove 12...Passive gear 14...Cover plate 16...Binion 17a, b...Sleeve 19a, b...Claw Piece 21...Switching lever 23...Stop bins 25a, b...Single acting cylinders 26a, b...Pusher 40...Step motor 42...Advance/retreat rod 9...Rotor 11...・Feed blade 13...Outer tube 15...Screw 17...Curler 18...Vertical shaft 20...Rotary shaft 22...Tension spring 43...Blade portion 41...Outer tube 44... Cutter 45... Drilling machine 46.
... Main shaft 47 ... Chuck 48 ... Opposite blade side 49 ... Lifting handle 50 ... Workpiece material, 51 ... Inner groove cutting device 52 ... Frame 53 ... Output side Gear 54...Transmission gear 55...Binion gear 56...Rack
57... Shaft portion 58... Moving body 5
9... Spring 60... Cylinder part 61.
...Gap portion 62...Holding hole 63...Contact portion 64...Slope portion 65...Blade portion 66.
...Air hose 67...Air hose 68...
Air hose 69...Key 70...Chuck
71...Table 80...Drilling machine with automatic grooving machine

Claims (1)

[Claims] Consists of a drilling machine and an inner groove cutting device that is attached to the drilling machine. It has a forward and backward movement rod that moves forward and backward, and a cutter whose blade part can protrude in a direction perpendicular to the direction of movement of the forward and backward movement of the forward and backward movement of the rod. The opposite side of the blade is fixed, and by operating the lift handle of the drilling machine, the inner groove cutting device is moved up and down relative to the workpiece, and the step motor is operated to move the workpiece using a cutter with a protruding blade. A drilling machine with an automatic groove cutter, characterized in that it is formed so as to be able to cut inner grooves in materials.