JP2846293B2 - Processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing apparatus, and more particularly to a power transmission mechanism suitable for speeding up and extending the life of the apparatus.

[0002]

2. Description of the Related Art In this kind of machine mechanism, Japanese Utility Model No. 60
There is an apparatus as shown in FIG. 21-21, and there is an example shown in FIG. 4 as a tapping apparatus. This means that the general-purpose motor 2 always rotates in one direction, and the multi-plate clutch (or conical clutch)
18 is moved up and down by a multi-plate clutch switching cylinder 22 to switch between normal rotation and reverse rotation. 19 is an intermediate gear, 20 is a forward rotation gear, 21 is a reverse rotation gear, and 23 and 24 are pushes.

Further, the structure of a tapping machine shown in FIG. 5 is often used. The general-purpose motor 2 is switched between forward rotation and reverse rotation, and the pitch feed push 27 is moved up and down by a dedicated gear 37 adapted to the screw diameter, thereby rotating and rotating the pitch.

FIG. 6 shows a transmission mechanism found in a machine tool such as a machining center. This method uses a rotation motor 28
And a pitch feed motor 29, both of which use a servomotor to perform tapping by two-axis interpolation.

[0005]

The prior art described above is
There were problems with the following:

In the structure shown in FIG. 4, the push part 2 of the rotary shaft is provided.
3 and 24 are subjected to high-speed sliding in the radial and thrust directions to increase the peripheral speed (about 1 in the radial direction only).
0% up). For this reason, there is no suitable bearing, and it is a metal push, and wear is severe, causing oil leakage and play, and the screw precision is deteriorated.

[0007] Further, power is transmitted by frictional force, causing slippage, resulting in inefficiency. In the case of speeding up, further slippage and variation occur, clutch wear is severe, and maintenance cost is high. is there. (Once every few months) In the structure of Fig. 5, since the general-purpose motor rotates forward and reverse,
The processing speed is limited and cannot be increased (currently the top level is 65 operations / minute). Screw diameter (pitch)
Each time, the gear 37 needs to be replaced, which requires a setup time.

Further, in the case of a multi-shaft, there is a requirement that all the screws have the same diameter. (For example, M3 and M4 cannot be machined at the same time.) In the structure shown in FIG.
It requires two servo motors, is expensive, and is not suitable for multiple axes.

An object of the present invention is to provide a high-speed operation and long-life processing apparatus.

[0010]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a press ram for at least drilling a workpiece to be continuously fed, a tapping device for tapping a drilled workpiece, a press ram and a tapping screw. A control panel for controlling the device is provided, the tapping device is disposed above the press ram, and the press ram has an opening below the tapping device to expose a workpiece, and the tapping device is covered through the opening.
This is achieved by a configuration in which tapping is performed on a prepared hole formed by a press ram of a work material .

[0011]

Since a pilot hole is formed by the press ram, the drilling operation is performed at a high speed, and the occurrence of burrs is reduced, so that the operation can be speeded up and the dimensional accuracy of parts or products can be improved. In addition, the tapping device can transmit the rotation of the servomotor to the first rotation shaft and the second rotation shaft that rotate the processing blade only through the drive side gear and the driven side gear. Can be reduced.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described with reference to FIG.

Reference numeral 1 denotes a servomotor, 3 denotes a driving gear fixed to the rotating shaft of the motor 1, 4 denotes a driven gear engaged with the gear 3, and 38 denotes a rotating shaft (first rotating shaft) which rotates together with the gear 4. , 14 are universal joints connected to the rotating shaft 38, 15 is a tap attached to the joint 14, and 17 is a workpiece to be threaded by the tap. Reference numerals 7 and 8 denote a first support plate (hereinafter referred to as a support plate 7) and a second support plate (hereinafter referred to as a support plate 8), respectively, which cannot slide on a rotating shaft 38 as a first rotating shaft via a ring 39. Is rotatably supported. The supporting plate 7 is slidably guided in the up-down direction (axial direction of the rotating shaft) by a penetrating shaft 9 (guide member) driven by a vertical cylinder 12 as a driving means, and the rotating shaft moves in the axial direction accordingly. I do. 6 is a mounting frame for supporting the motor and the shaft 9, 5 is a base for supporting the shaft 9 and the cylinder 12, and 13 is a support plate 8.
Is an oil-tight cylinder that can slide up and down. Oil 41 is sealed in a portion surrounded by the mounting frame 6 and the cylinder 13. Numeral 16 denotes a packing made of an O-ring which keeps oil tightness.

The rotary power transmission system from the servo motor 1 to the tap 15 includes the servo motor 1 → the driving gear 3 →
Driven side gear 4 → rotating shaft 38 → universal joint 1
4. In this transmission system, the drive side gear 3 and the driven side gear 4 slide in both the rotational direction and the thrust direction.
In addition, since the sliding portions of the rotating shaft 38 and the support plate 7, the base 5, and the support plate 8 are arranged only in the radial direction, a dedicated radial bearing can be used, and high speed and long life can be achieved. A vertical transmission system for cutting the tap 15 into the workpiece 17 is provided by a support plate 7 → a collar-shaped ring 39 (fixed to the indication plate 7 and rotatably supporting the rotary shaft 38) by the power of the vertical cylinder 12. → Support plate 8 → Universal joint 14 → Tap 15.

In this transmission system, there are no parts that receive sliding in both the radial direction and the thrust direction except for the driving gear 3 and the driven gear 4, and the sliding portions of the shaft 9, the base 5 and the motor mounting frame are not provided. Since the linear motion ring 10 dedicated to sliding in the thrust direction can be used, the life can be extended. The rotation shaft 38 and the support plates 7 and 8 are engaged with each other by using a radial gearing 11 dedicated to rotation.

FIGS. 3A and 3B show the top dead center and the bottom dead center, respectively, of the operation of the apparatus. That is, in the state of FIG. 3A, the support plate 12 is lifted upward by the cylinder 12, and the ring 3
9, the support plate 8, the rotating shaft 38, the joint 14, and the tap 15 are at the top dead center position.

In the tapping operation, the motor 1 is rotated in the state (a), and at the same time, the support plate 7 is lowered by the cylinder (in the direction of the arrow). Accordingly, the portions 8, 14, 38, and 39 are lowered, and the tap 15 comes into contact with the workpiece 17, and tapping is performed as it is.

The rotating shaft 42 (second rotating shaft) below the support plate 8 has a bipe-like shape and has a center shaft 43 lifted up by a spring and vertically slidable therein. Is fixed at the upper end. Accordingly, the center shaft 43 descends against the spring pressure during tapping.
After tapping, the motor 1 is rotated in the reverse direction to remove the tap 15 from the workpiece. Therefore, the conventional forward and reverse rotation clutches and gears are unnecessary. This forward / reverse switching is performed faster than the clutch. In this apparatus, there are many parts that slide at high speed, and there is a risk of burning. To prevent this, the tap head inside 40 is filled with lubricating oil 41 to extend the life. The lubricating oil returns to the hydraulic unit tank (not shown) and always supplies fresh lubricating oil. In the embodiment, the servo motor 1 can be rotated at 3000 rpm (1200 rpm for a general-purpose motor).

According to the present embodiment, the conventional processing speed of 65 times / minute (65 screws are cut in one minute) is 3000 rpm.
In this case, the speed can be increased by about 35% to 85 to 90 times / minute. This speedup is achieved by improving the rotation speed and speeding up the forward / reverse switching.

Further, there are many wear parts such as clutches and pushes in the related art, and it is necessary to disassemble the entire transmission part, so that the maintenance time is long. However, according to the present embodiment, the wear parts are only the drive side gears. This reduces the number of replacements due to measures for prolonging the service life, and the disassembly at the time of replacement is facilitated by disposing the drive-side gear at the upper part, so that maintenance is easy and costs can be reduced.

FIG. 7 shows the appearance of a multi-functional press in which the multi-axis screw standing machine of the present embodiment is built in a press machine, and performs the screw working simultaneously with the press working.

Reference numeral 30 denotes a tapping unit for performing tapping, 32 denotes a press ram, and 33 denotes an operation panel.

In the present embodiment, simultaneous press + threading processing is performed for 4 times.
0 to 45 times / min is possible. FIG. 8 shows an example of the processing.
The workpiece 17 is supplied, the prepared hole processing 44, the punching processing 34, the tapping processing 35, and the punching and bending processing are performed, followed by cutting to obtain a finished product 36.

[0024] This processing makes it possible to greatly reduce the cost of the tapping press part.

The following can be said in the above embodiment.

(1) In the motor direct-drive system, there is no slippage, and the entire rotational force of the motor can be transmitted without waste. Therefore, the speed can be increased.

(2) Since the permissible rotational torque of the servomotor is large, it can be rotated at a high speed and has a characteristic that the forward / reverse rise time is extremely short. Therefore, high-speed and high-frequency tapping becomes possible.

(3) Rotation in the radial direction is performed by the motor 1 on the driving side gear 3 → driven side gear 4 → rotating shaft. (3) Rotation in the radial direction is performed by the motor 1 on the driving side gear 3.
→ the driven gear 4 → the rotary shaft 38 → the universal joint 14. The transmission direction is only the rotation direction, and the radial bearings 11 are arranged respectively. The transmission in the thrust direction is performed in the order of the vertical cylinder 12 → the support plate 7 → the shaft 9 → the support plate 8 → the universal joint 14. Thus, the rotation in the radial direction and the sliding in the thrust direction are divided. According to this method, the rotational peripheral speed of the sliding portion can be reduced by 10 to 15%, and a bearing dedicated to the thrust direction and the radial direction can be selected.

(4) Only parts on which wear is expected are gears on the drive side, and the gears on the drive side are arranged on the upper part for easy replacement. As a result, a long service life and maintenance become easy.

[0030]

According to the present invention, since the pilot hole is formed by pressing, the speed of the tapping operation can be increased and the tapping can be performed with high precision. Since the number of wear parts can be reduced, the life of the apparatus can be extended. Further, since the number of rotations of the rotation transmitting section can be increased, the processing speed can be increased.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tapping unit used in one embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a tapping unit used in one embodiment of the present invention.

FIG. 3 is a sectional view showing an operation state of the tapping unit used in one embodiment of the present invention.

FIG. 4 is a cross-sectional view illustrating a configuration of a conventional tapping unit.

FIG. 5 is a perspective view showing the configuration of another conventional tapping unit.

FIG. 6 is a perspective view showing the configuration of another conventional tapping unit.

FIG. 7 is a perspective view of a processing apparatus having a tapping unit and a press according to one embodiment of the present invention.

FIG. 8 is a perspective view showing a processed state of a workpiece according to an embodiment of the present invention.

[Explanation of symbols]

1: motor, 3: drive side gear, 4: driven side gear, 5: base, 10: sliding engagement part, 11: rotation engagement part, 12: drive means, 15: machining blade, 7.8: support Plate, 9: Guide member

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-47-36072 (JP, A) JP-A-61-212031 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B23G 3/00

Claims (2)

(57) [Claims] 1. A press ram for at least drilling a workpiece to be continuously fed, a tapping device for tapping a drilled workpiece, and an operation panel for controlling the press ram and the tapping device. The tapping device is disposed above the press ram, the press ram includes an opening below the tapping device to expose the workpiece, and the tapping device is provided through the opening. Drilled by the press ram of the workpiece
A machining device configured to perform tapping on a prepared hole . 2. The tapping device according to claim 1, further comprising: a servomotor capable of normal and reverse rotation; a driving gear fixed to a rotating shaft of the servomotor and having teeth extending in an axial direction of the rotating shaft of the servomotor; A plurality of driven gears engaged with the driving gears and slidably provided along the axial direction of the rotary shaft of the servomotor, and a center of rotation of each of the plurality of driven gears. A first rotating shaft fitted coaxially with the driven gear and transmitting the rotational force of the servomotor; and a plurality of the first rotating shafts provided facing the driving gear and rotatably supported simultaneously. A first supporting plate to be moved, a driving unit for moving the first supporting plate up and down along the axial direction of the first rotating shaft, and a driving unit that moves the first supporting plate when the first supporting plate moves. Slidingly guiding the first support plate in the axial direction of the first rotation shaft; A guide member, a base for supporting the driving means and the guide member and through which the first rotation shaft passes, and a plurality of the first rotation shafts provided on the opposite side of the base with respect to the first support plate; A second support plate for rotatably supporting at the same time, and an axis of the first rotation shaft with respect to the first support plate and the second support plate when the first support plate is moved by the driving means. A ring for maintaining the positional relationship in the direction constant, a second rotating shaft connected to the lower portion of the first rotating shaft coaxially with the first rotating shaft and extending below the second support plate, A processing blade connected to the second rotating shaft via a universal joint for processing the workpiece, and the servomotor is rotated forward when processing the workpiece and reversely rotated after processing. Forward / reverse switching Processing equipment ranging preceding claim of the claims, comprising the stage.