JPS5926422B2 - punching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drilling device used for poling, and particularly to a cooling device for a bearing, an oil seal, etc. in this drilling device.

As shown in FIGS. 1 to 3, this type of perforation device that has already been proposed has a cylindrical collector outer cylinder (a) with a hole (a) for each cutting oil inlet (b) and each drain outlet. C, the collector outer cylinder a is fitted with a wheel e having grooves d, and the collector outer cylinder a is positioned on both sides of the wheel e.
Seal supports g with built-in oil seals f and bearings such as ball bearings are provided in such a way that they do not come out outward, and the main shaft i is brought into contact with each of the oil seals f on each bearing. A connector sleeve j and an inner cylindrical body k are attached to one end opening of the main shaft i.
are provided concentrically to form a cutting oil supply passage 1, an outer cylindrical body m is provided substantially integrally with the connector sleeve j, and a front end portion of the outer cylindrical body m and the inner cylindrical body A boring head p having a cutting tip 0 is provided (third
On the other hand, an injection hole q communicating with the oil filler port is formed in a part of the main shaft i so as to communicate with the supply passage 1, and an outflow hole r1 is formed in the base of the boring head p. and a reflux hole r2, and a tip ejector (tip reflux hole) S is provided at the tip of the inner cylinder body, and a rear end ejector (rear end inflow hole) T is provided at the rear end of the inner cylinder body. It is something that

Therefore, when perforating the workpiece W,
The main shaft i is rotated by a drive shaft (not shown), and the boring head p, which is integrated with the main shaft i, is rotated to start drilling into the workpiece W. At the same time, as shown by the chain line in FIG. , the cutting oil is supplied to each oil filler port through each oil supply pipe V provided in the supply source U, and furthermore, the cutting oil that has flowed into each oil filler port is supplied to the circumferential groove d, the injection hole q,
It is injected from the supply passage l and each outflow hole r1 to each cutting tip 0 located in the perforation part of the workpiece W to cool each cutting tip 0, and at the same time, the used cutting oil is transferred to the workpiece W. Together with chips generated during cutting, the inner cylinder k can be returned to the cutting oil supply source U through the main shaft i through a filter (not shown).

However, in the above-mentioned drilling device, as is clear from FIG. 1, the main shaft i that abuts each one of the bearings fitted in the collector outer cylinder a and each of the oil seals f makes rolling motion or sliding contact. Because of this, there is a risk of heat generation and wear due to friction, so the number of revolutions and speed are limited by the diameter of the oil seal f and the diameter of the bearing.

That is, limitations on the number of rotations of the spindle i, etc. make it difficult to provide the cutting tool with optimal cutting conditions, which in turn causes a reduction in the life of the cutting tool and the cutting efficiency.

On the other hand, as a means to solve this problem, if the diameter of the cutting tool used is limited according to the rotational characteristics of the cutting tool, if the range of drilling diameters is large, many types of drilling devices must be prepared in advance. Moreover, each time the cutting diameter differs, the cutting tool support, cutting oil piping, etc. must be replaced, which has the disadvantage of lowering the cutting efficiency.

In order to solve the above-mentioned drawbacks, the present invention forms a jacket in a cooling cylinder having a cutting oil supply 1, and surrounds the collector cylinder in the cooling cylinder so that it can be cooled, and further, A wheel fitted through each seal member, having an injection port bored in the middle of the collector cylinder so as to communicate with the jacket, and having an injection hole in the collector cylinder where the injection port is located. A main shaft in which a boring head is mounted on each bearing 9, and each seal support with a built-in oil seal and each bearing are provided in the collector cylinder body on both sides of this wheel body so as not to be pulled out. is installed as a shaft through the wheel body, and a plurality of supply holes communicating with the injection hole are bored in the main shaft, so that the oil in the jacket actively fills the respective bearings and oil seals. The object of the present invention is to provide a drilling device that is capable of cooling the drilling head and also supplying cutting oil from the oil supply port to the boring head.

Hereinafter, the present invention will be described with reference to an illustrated embodiment.

4 and 5, reference numeral 1 denotes a cylindrical cooling cylinder forming a jacket 2, and a cutting oil filler port 3 is provided in a part of the river surface of the cooling cylinder 1. The cutting oil from the oil supply port 3 flows into the jacket 2.

A collector cylinder 4 is watertightly fitted to both ends of the cooling cylinder 1 through seal members 5 such as 01J rings, and an oil fill hole is provided in the middle of the collector cylinder 4. 4
A is bored so as to communicate with the jacket 2, and a wheel 6 having an injection hole 6a is fitted into the collector cylinder 4 located directly below the oil injection hole 4a.

Furthermore, the collector cylinder body 4 located on both sides of the wheel body 6 has each seal support 8 in which each oil seal 7 is built.
And each bearing 9 such as a ball bearing is provided so as not to be pulled out outwardly.

Furthermore, a main shaft 10 connected to a drive shaft (not shown) is rotatably mounted on each of the bearings 9, and this cylindrical main shaft 10 has a plurality of supply holes 11 in the axial direction. It is perforated.

On the other hand, a connector sleeve 12 is fixed to one end opening of the main shaft 10 with a fitting member 18 such as a nose nut, and an outer cylinder 13 is screwed to one end of the collector sleeve 12. These are substantially integrated.

Further, at the base of the connector sleeve 12 located inside the outer cylinder 13, an inner cylinder 14 is connected to a cutting oil supply passage 1.
5, and this supply passage 15 communicates with each of the supply holes 11 through through holes 16.

As shown in FIG. 3, a boring head p having a cutting tip O is provided at both ends of the outer cylindrical body 13 and the inner cylindrical body 14. At the same time, cutting oil is drilled in a part of this boring head p, and flows from an outflow hole r1 communicating with the supply passage 15 to a return hole r.
2, and can be returned together with the chips into the spindle 10.

Further, a drain plug 17 is provided at the lower part of the collector cylinder 4, passing through the cooling cylinder 1.
By pulling out the main shaft 7, the drain inside the main shaft 10 can be discharged.

Therefore, when drilling a workpiece now, the spindle 1
0 is rotated by a drive shaft 7 (not shown), the boring head, which is integrated with the main shaft 10, is rotated to drill a hole in the workpiece, and at the same time, cutting oil is forced to flow into the jacket 2 from the oil supply port 3. The bearings 9 and oil seals 7 fitted in the collector cylinder 4 are cooled in this manner.

Also, a part of the cutting oil that has flowed into the jacket 2 passes through the oil filling hole 4a, the injection hole 6a, and the supply hole 11 to the supply passage 15.
As mentioned above, the cutting oil in this supply passage 15 is jetted out from the outflow hole r1 of the boring head p and after finishing the work, it flows into the main shaft 10 through the return hole r2. It is designed to flow back together with cutting.

As described above, according to the present invention, the jacket 2 is formed in the cooling cylinder 1 having the cutting oil supply port 3, and the collector cylinder 4 is surrounded by the jacket 2 in the cooling cylinder 1 to be cooled. Furthermore, each sealing member 5 is fitted in between, and an inlet 4a is bored in the middle of the collector cylinder 4 so as to communicate with the jacket 2.
A ring body 6 having an injection hole 6a is fitted into the collector cylinder body 4 in which the collector cylinder body 4 is located
Seal supports 8 and bearings 9 with built-in oil seals 7 are provided in such a way that they cannot be removed.
The main shaft 10 attached to the boring head is passed through the ring body 6, and the main shaft 10 is provided with a number of supply holes 11 communicating with the injection hole 6a, so that the bearing i
Not only can the oil seal 7 be actively cooled to prevent heat generation, but also the number of revolutions of the main shaft 10 can be increased, so cutting efficiency can be improved.
In addition, the width of the cutting tool becomes wider, and the life of bearings, oil seals, etc. can be greatly extended, and other excellent effects are achieved.

Incidentally, the cooling device in the above-mentioned embodiment can be used not only for red tag processing of a boring head, but also for ordinary cutting tools, etc., without changing the scope of the present invention. You are free to change the design as you like.

BRIEF DESCRIPTION OF THE DRAWINGS Figures 1 to 3 are diagrams for explaining the punching device that has already been proposed, and Figure 4 is a sectional view of the punching device of the present invention.
FIG. 5 is a sectional view taken along the chain line B--B in FIG. 4.

1... Cooling cylinder body, 2... Jacket,
3... Fuel filler port, 4... Collector cylinder body,
5... Seal member, j... Oil seal, 9... Bearing, 10... Main shaft, 13
......Outer cylinder body, 14...Inner cylinder body, 15.
...Supply passage.

Claims (1)

[Claims] 1. A jacket is formed in the cooling cylinder which covers the cutting oil supply port, and the collector cylinder is surrounded by the jacket and can be cooled, and the collector cylinder is fitted through each sealing member, and An injection port is bored in the middle of the collector cylinder so as to communicate with the jacket, and a ring body having an injection hole is fitted into the collector cylinder body where the injection port is located, and a wheel body having an injection hole is fitted on both sides of the cylinder body. Seal supports with built-in oil seals and bearings are installed in the collector cylindrical body so as not to be removed, and a cylindrical main shaft is mounted on each bearing by passing through the ring body. A drilling device characterized by drilling a plurality of supply holes communicating with the injection hole.