JPS628967Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention not only allows easy attachment and detachment of the workpiece, but also
This invention relates to a large multi-spindle drilling machine that can sufficiently supply cutting fluid.

For example, using a large horizontal multi-spindle drilling machine,
When drilling a hole with a depth of about 75 to 150 mm on the side of a ring-shaped workpiece with a diameter of 1000 to 1500 mmφ,
It was not possible to use a regular drill because the cutting fluid could not be sufficiently supplied into the machined hole, so an oil hold drill with a flow path formed inside to guide the cutting fluid had to be used.

In order to use an oil hold drill, a pump, piping, etc. for feeding the cutting fluid are required, and the oil hold drill itself is expensive, resulting in a problem of high cost.

In addition, when using a large upright multi-spindle drilling machine, the cutting fluid flows down along the drill, ensuring a sufficient supply of cutting fluid to the drilled hole, and eliminating the need for an expensive oil-hold drill. However, when attaching and detaching the workpiece, the workpiece must be held horizontally, and with simple equipment such as a hoist, there is a risk of losing balance and falling, so large-scale equipment is required.

The present invention was developed in view of the above circumstances, and its purpose is to eliminate the need to use special drills such as oil hold drills when drilling deep holes in large workpieces. To provide a large-sized multi-spindle drilling machine that allows workpieces to be attached and detached using simple equipment such as a hoist.

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

FIG. 1 is a side view showing an example of a large multi-spindle drilling machine of the present invention, and FIG. 2 is a plan view thereof. Code 1 in the diagram
1 is a multi-spindle drilling machine body, in which a spindle head 3 is installed at one end of a bed 2 (on the right side in the drawing), and a table 4 is installed at the other end (on the left side in the drawing).

The total length of the bed 2 is set to approximately 5100 mm, the movement stroke of the table 4 is set to approximately 700 mm, and the spindle head 3 is equipped with a 75 horsepower main motor 5, weighs over 20 kg, and has a diameter of
It is possible to process a ring-shaped workpiece A having a diameter of 300 mm or more, for example, a diameter of 1000 to 1500 mm.

The spindle head 3 and table 4 described above are located on the same axis, and the bed 2 is fixed to the base 6 in an inclined state so that the spindle head 3 side is higher and the table 4 side is lower.

Therefore, when machining workpiece A, the cutting fluid flows into the machining hole along the drill, and the cutting fluid flows into the machining hole without using a special tool such as an oil hold drill.75
It is possible to machine deep holes of ~150mm. The processed hole is formed in the axial direction of the workpiece A.

Conventionally, a drilling machine has been installed at an angle, but this is for machining oblique holes, and the spindle head and table are not located on the same axis as in the present invention.

In the present invention, the multi-spindle drilling machine body 1 is not only tilted, but also its tilt angle is set as follows. In other words, the larger the angle of inclination of the multi-spindle drilling machine body 1, the easier the cutting fluid will flow. However, if the angle of inclination is too large, the hoist 7 is used between the spindle head 3 and the bed 4 to hold the workpiece A vertically. Since it becomes impossible to secure a space P for attaching and detaching in this state, the angle is set to the maximum angle that can secure the space P.

In this embodiment, the angle of inclination is set to about 12° to 15° in consideration of safety during installation.

Therefore, no large-scale equipment is required for attaching and detaching the workpiece A.

Note that the bed 4 is provided with a chuck 8, which fixes the workpiece A to the bed 4 during machining.
Further, the bed 2 of the multi-spindle drilling machine body is disposed below the ground as far as the dashed line shown in FIG. 1 so that the workpiece A can be easily attached and detached.

3a and 3b show the power transmission mechanism of the spindle head 3. FIG. According to the figure, the pinion 9 provided on the drive shaft 5a of the main motor 5 is connected to the inner tooth 10a of a ring-shaped large diameter driving gear 10.
The rotation of the main motor 5 is transmitted to the driving gear 10.

A plurality of driving pinions 11 mesh with the external teeth 10b of the driving gear 10, and each driving pinion 11 is provided with a spindle 13 via a universal joint 12. Each spindle 13 protrudes from a hole 14a of the cluster plate 14, and a drill 15 is attached to this protrusion.

During machining, the main motor 5 is operated and the table 4 is moved toward the spindle head 3 side. As a result, each drill 15 is driven by the driving gear 10, and a plurality of holes are simultaneously drilled in the side surface of the workpiece A.

In the power transmission mechanism described above, the pinion 9 on the main motor 5 side is connected to the internal teeth 10 of the driving gear 10.
a, and the driving pinion 11 on the drill 15 side meshes with the external teeth 10b.
The life of the pinion 9 is longer than before.

That is, as shown in FIGS. 4a and 4b, in the conventional power transmission mechanism, two driving gears 1
Since the configuration includes a pinion 9 between 6 and 16,
If the module of the driving gears 16, 16 is made larger, the circumferential pitch becomes larger, so the number of driving pinions 11 that mesh with the driving gears 16, 16 cannot be increased. There must be. Therefore, the module of the pinion 9 must be made smaller accordingly, but since a large load is applied to the pinion 9, its life will be shortened.

By dividing the internal teeth 10a and the external teeth 10b as described above, the module of the internal teeth 10a can be made large, and a pinion 9 with large teeth can be used.

As explained above, according to the book, a multi-spindle drilling machine body in which a spindle head and a table with a chuck for fixing a workpiece are located on the same axis is constructed such that the spindle head side is high and the table side is low. The machine is fixedly installed on a base at an angle, and the angle of inclination is such that the cutting fluid can flow into the machined hole of the workpiece along a drill attached to the spindle head, and a simple hoisting device such as a hoist is used. Since the workpiece is set at an inclination angle that allows attachment and detachment in a vertical position, there is no need to use an oil hold drill, and cutting fluid is sufficiently supplied into the machined hole, extending the life of the drill. It can be made longer. Further, the workpiece can be attached and detached using a simple hoisting device such as a hoist, and large-scale equipment is not required. Furthermore, there is no need to maintain the workpiece horizontally, there is no risk of it losing its balance and falling, and the table is tilted.
There is no risk that the workpiece will fall toward the drill when attaching or removing the workpiece, and accidents such as a worker getting caught between the workpiece and the drill can be avoided, and safety can be ensured. Furthermore, since the table side is lowered (front center of gravity) and the load of the workpiece does not act much on the spindle, the durability of the spindle is improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view, FIG. 2 is a plan view, FIG. 3a is a simplified front view of the power transmission mechanism, FIG. Diagram a
1 is a schematic front view of a power transmission mechanism of a comparative example, and FIG. 1...Multi-spindle drilling machine body, 3...Spindle head, 4...Table, 6...Base, 7...Hoist, 8...Chick.

Claims (1)

[Scope of utility model registration request] A multi-spindle drilling machine body, in which a spindle head and a table provided with a chuck for fixing a workpiece are located on the same axis, is fixedly installed on a base with the spindle head side being high and the table side being tilted low, The angle of inclination is such that the cutting fluid can flow into the machined hole of the workpiece along the drill attached to the spindle head, and the workpiece can be installed and removed in a vertical position using a simple hoisting device such as a hoist. A large multi-spindle drilling machine characterized by being able to set the tilt angle to any possible angle.