JPS60249517A - Chuck with supply oil hole - Google Patents

Abstract

PURPOSE:To easily inject oil from a chuck being prevented from decreasing its clamping force, by connecting a supply oil hole of an oil supply device, fitted to be inserted into the main unit of the chuck, wih a part of the hollow and providing in an end surface a ring member to which a spherical unit having a through hole corresponding to the hollow hole is rotatably inserted. CONSTITUTION:When a tool is tightened to be fixed by inserting a tool shank into a shank insertion hole 28 and rotating a turing cylinder 20, a spherical oil injecting part 24, inserting to its injection oil hole a wrench or the like, is previously adjusted to an angle at which oil can be injected to a cutting edge part relating to cutting in accordance with the length of a tool cutting edge. Next, a chuck main unit 1 is fixed by inserting a shank 2 into a main spindle of a machine tool, and if a supply oil pipe is connected to a nipple of a supply oil threaded hole 12, cutting oil at cutting time is allowed to flow into the nipple from the supply oil pipe further into a lateral hole 8 from each lateral hole 9 via an annular oil groove 18, being jetting from the injection oil hole of the spherical oil injection part 24 and sufficiently injected to the cutting edge in a cutting part. In this way, the oil can be easily injected without causing the worsening of clamping force by a chuck.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is characterized by forming a large number of hollow holes in the chuck tube of the chunk body, and passing through a large number of needle rollers arranged in the chuck tube with an inclined axis. This invention relates to a chuck that has a rotary tube inserted therein to improve its grip on a rotary cutting tool.

(Conventional technology) To lubricate rotary cutting tools such as drills and end mills, a lubrication pipe is led from the outside and the lubrication port of the lubrication pipe is directed toward the cutting part, or a lubrication hole is drilled in the rotary cutting tool itself. There was one (Japanese Utility Model Publication No. 15946/1983) in which the oil supply hole and the oil supply path provided in the chuck were communicated. With the former, the oil filler port must be adjusted by hand each time the machined part changes or the tool is replaced, and depending on the workpiece, parts with plate-shaped protrusions may be placed between the tool and the oil supply pipe. enter,
Lubricating was sometimes blocked. The latter has a complicated structure and is expensive.

(Objective of the Invention) The present invention has been made to solve the problems of the prior art described above, and the purpose of the present invention is to drill a large number of hollow holes in the chuck tube of the chuck body in order to improve the gripping force of the tool. With just a slight modification to the conventional chuck, in which a rotary cylinder is inserted into the chuck cylinder through a large number of needle rollers arranged with an axis inclined with respect to the axis of the chuck body, To provide a chuck that can be easily lubricated without impairing gripping force.

(Structure and Effects of the Invention) The present invention includes a chuck main body having a shank that fits with the spindle VC of a machine tool at one end, a chuck tube at the other end, a rotating tube that is fitted onto the outer peripheral surface of the chuck tube, Interposed between the chuck tube and the rotating tube.

A needle roller type chuck consisting of a needle roller that is held with an axis that is inclined with respect to the #J line of the chuck body, and has many hollow holes drilled in parallel from the tip of the chuck tube beyond the contact area with the needle roller. In this step, a lubricating device is inserted into the main body, and one or more of the hollow holes are communicated with the lubricating hole of the lubricating ring, and a ring member is provided on the end face of the chuck tube, and the ring member is connected to the lubricating device. A spherical body having a through hole formed therein corresponding to the opening of the hollow hole is rotatably inserted, and a cylindrical portion for fixing a ring member to the chuck tube is provided protrudingly.

With this structure, it is possible to lubricate without the need for any special equipment by simply communicating the hollow hole with the oil supply hole of the oil supply device.Chipping of the cutting edge can be prevented, resulting in extremely good machined surface roughness. This allows for sufficient lubrication even if there are many changes in the machining part.

Furthermore, by rotating the spherical body that is rotatably fitted into the ring member, the oiling angle can be freely changed, and the parts that require oiling can be accurately oiled. Furthermore, since the structure is simple, it is easy to assemble, is inexpensive, and enables high-precision machining without any loss in gripping force of the tool.

Next, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, the chuck body (1) has a shank (2) at one end that can be attached to the main shaft of a machine tool (not shown), and further includes a collar part (3) and a cylindrical part (4).
and a chuck cylinder part (5) for gripping a tool at the other end.

There is a hollow deep hole (7) in the thick part (6) of the chunk part (5).
A large number of holes are drilled parallel to each other. The cylindrical part (4) has a long hollow hole (8) continuous from the hollow deep hole (7), and a horizontal hole (9) opening from the hollow hole into the cylindrical part. form a passageway.

The oil supply device 00 has a central cylindrical portion (4) of the chuck body (1).
], and the oil supply screw hole (6
) and annular step portions (13) are formed at both ends, an oil seal 0→ is fitted into the step portion a, and the presser foot 09 is connected to the oil supply ring (13).
1) Fix with bolts αQ at both ends. Therefore, the oil seal α is also fixed. Also, the oil supply screw hole (a)
is positioned corresponding to the side hole (9) n snap ring α
Stop the axial movement with η. Further, a rotary cylinder (a) is rotatably inserted through a number of needle rollers (one of which is arranged along an axis inclined with respect to the outer line of the cylindrical portion (4)).

A ring member (c) is attached to the tip of the chuck tube (6), and the ring member has a cylindrical portion (c) for fitting into the hollow hole (7), as shown in an enlarged view in FIG. ) is provided protrudingly, and a spherical body (c) with a through hole (c) is rotatably housed in correspondence with the hollow hole (8) communicating with the horizontal hole (9). An example of the arrangement of the cylindrical portion (a) and the spherical body in the ring member Qη is shown in FIG. Chuck tube (
5) Put the spherical body (c) into the oil filler (8) on the end face, and the hollow hole (7)
When the cylindrical part (a) is faced to the side and the cylindrical part ei is joined to the hollow hole (7), the ring-shaped protrusion 4 provided at the tip of the cylindrical part is pre-installed in the hollow hole (7). The ring member (c) is fitted into the ring-shaped groove (c) that was formed, and is fixed to the end surface of the chuck cylinder part (5). The spherical body (c) is a ring member e
It is rotatably stored in the spherical hole (c) formed in 21JK.
Therefore, the oiling angle can be adjusted freely using a suitable tool such as a wrench in the oiling hole (c).

First, when inserting the tool shank (not shown) into the shank insertion hole (F) and rotating the rotary cylinder (A) to tighten and fix the tool, the lubrication hole in the spherical lubrication part (C) is adjusted according to the length of the tool cutting edge. Insert a wrench or the like into (c) and adjust the angle so that the cutting edge part involved in cutting can be lubricated in advance. Next, the shank (2) is inserted into the main shaft of the machine tool to fix the chuck body (1), and the oil supply pipe (not shown) is connected to the nipple of the oil supply screw hole 02. During cutting, the cutting oil enters the nipple from the oil supply pipe, passes through the annular oil groove, enters the oil reservoir (8) from each side hole (9), and squirts out from the oil supply hole (c) of the spherical body. Apply sufficient oil to the cutting edge of the cutting part. In this embodiment, oil is applied from three sides, so in the case of end mill processing, applying oil to just one location completely eliminates chips from the end mill cutting edge. This prevents the cutting edge from entering the next cutting with chips still in it, eliminating chipping and abnormal wear of the cutting edge, and resulting in very good machined surface roughness.

Correct! In addition, it is possible to completely prevent chips from entering the hollow hole (7).

Furthermore, as shown in FIG. 5, the suspension/gating member 12 can be made of two synthetic resin plates (21a) and (21b). In this case, when each plate is stacked, a spherical hole (c) is formed, and after storing the spherical body 04 in the spherical surface, each plate (21a, ), (21b) is fixed with adhesive. do.

In addition, the ring member 121) is shown in FIGS. 6, 7, and 8.
As shown in the figure, if necessary, it may be provided integrally with a collet □□□ having several slotted rods formed in the longitudinal direction. First, the shank of the cutting tool is inserted into the through hole 0η of the collet, and then inserted into the shank insertion hole (c) of the chuck cylinder portion (5) of the chuck body (1) and fixed.

At this time, the spherical body (c) is inserted into the long hollow hole (8) that forms the oil supply path.
) must match n. By integrating the collet and the ring member in this way, tools with a wide range of dimensions can be used by arranging collets that match the diameter of the tool shank.

Furthermore, when the ring member f2 force and the collet (G) are integrated, as shown in FIG.
21a) and the flat plate (21b) may be fixed with bolts 0→.

[Brief explanation of the drawing]

FIG. 1 is a side view with main parts cut away of an embodiment of the present invention;
FIG. 2 is an enlarged partial sectional view of the main part of the present invention, FIG. 3 is a front view of the ring member, FIG. 4 is a sectional view taken along the line IV--IV in FIG. 3, and FIG. 5 is a main part of another embodiment. FIG. 6 is a partially cutaway side view of the main part of another embodiment, FIG. 7 is a partially cutaway side view of the main part of another embodiment, and FIG. 8 is a partially cutaway side view of the main part of another embodiment. FIG. 9 is a partially cutaway side view of the main part of another embodiment. 1...Shank 5...Chuck tube 7.8...Hollow hole 11...Oil supply device 12...Oil supply hole 19...
・Needle roller 20...Rotating tube 21...Ring member 22...Cylindrical part 24...Spheroidal body agent Patent attorney Jun Kawachi 2nd figure name 3rd figure 5 figure 6 figure 9 figure 9

Claims (3)

[Claims] (1) One end is equipped with a shank that fits into the spindle of a machine tool, and the other end is equipped with a chuck tube to which a cutting tool is attached.
In a needle roller type chuck, a number of hollow holes are drilled in parallel from the tip of the chuck cylinder to beyond the contact area with the needle roller, which is held with an axis that is inclined with respect to the axis of the chuck body. A lubricating device is inserted into the main body, and one or more of the hollow holes are communicated with the lubricating hole of the lubricating device, and a ring member is provided on the end face of the chuck tube, and the ring member is connected to the lubricating device. A chuck with an oil supply hole, characterized in that a spherical body with a through hole corresponding to the opening of a hollow hole is rotatably inserted. (2) The chuck with an oil supply hole according to claim 1, wherein the ring member is formed by laminating two discs. (3) The ring member is integrally provided with a collet that is attached to a shank insertion hole.