JPS62292343A - Cutting liquid feeding device for machine tool - Google Patents

Abstract

PURPOSE:To prevent the scattering of liquid by providing a cutting liquid introducing valve device on the end side face of a main spindle head, providing a liquid receiving device on the back side of a tool head, and making said cutting liquid jet out toward a tool via a nozzle on the front side of said tool head. CONSTITUTION:When the tool head shaft 6 of a tool head 16 is installed on the end part of a main spindle 4, a liquid receiving device 33 on the tool head 16 presses the valve stem 30 of a cutting liquid introducing valve device 23 on a main spindle head 1 rearward against spring force, opening the cutting liquid introducing valve device 23, and receives cutting liquid through the opening part 32 of the cutting liquid introducing valve device 23. The cutting liquid enters the annular chamber 38 of the tool head 16 and, when the annular chamber 38 is uniformly filled, the liquid flows into plural nozzles 39, 40. After that, the liquid is concentratedly jetted out of the ends of the nozzles 39, 40 toward tools 21, 22 held on the end parts of sub-spindles 19, 20, corresponding to the nozzles.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention A0 Objective of the Invention +11 Industrial Application Field The present invention relates to a tool head that rotatably supports a plurality of sub spindles at the tip of a main spindle. The present invention relates to a cutting fluid supply device for a machine tool, in which a head shaft is removably attached and each sub spindle is rotationally driven by rotation of a main spindle.

(2) Prior Art Japanese Utility Model Application Publication No. 57-91542 discloses a device that supplies cutting fluid to a tool from a large number of cutting fluid supply holes. However, in this conventional device, the distance from the cutting fluid supply hole to the tool is long, so the cutting fluid tends to scatter on the way to the tool, making it impossible to supply cutting fluid to the tool in a concentrated manner. Furthermore, the formation of the cutting fluid supply path is complicated.

(3) Problems to be Solved by the Invention The tool head shaft of a tool head that rotatably supports a plurality of sub spindles is removably attached to the tip of the main spindle, and each sub spindle is In a machine tool configured so that the spindle is rotationally driven, when supplying cutting fluid to a tool held at the tip of each sub-spindle, the tool head shaft is configured to be detachable from the main spindle. Because of this, the piping structure for supplying cutting fluid to the tools is unavoidably complicated in conventional equipment, and the piping structure for supplying cutting fluid to the tools must be evenly distributed to each tool held by multiple sub-spindles. It is not easy to supply cutting fluid to the

In view of these circumstances, the present invention has a simple piping configuration, a short cutting fluid supply path, and allows the cutting fluid to be supplied to the tools in a concentrated manner without scattering. The main object of this invention is to obtain a cutting fluid supply device for a machine tool that can evenly supply cutting fluid.

B1 Structure of the Invention (1) Means for Solving Problems According to the present invention, the tool head shaft of the throat can be detachably attached to the tip of the main spindle to rotatably support a plurality of sub spindles. A cutting fluid supply device for a machine tool, the cutting fluid supply device being mounted on the machine tool and configured so that each of the sub spindles is rotationally driven by the rotation of the main spindle, the tip of a main spindle head rotatably supporting the main spindle; The side surface of the part has a valve stem that projects forward and an opening that opens toward the front. When the valve stem is pushed backward against a spring force, the valve opens and the cutting fluid is discharged from the cutting fluid storage tank. A cutting fluid conduction valve device is disposed to conduct the sent cutting fluid to the opening (1i), and the tool head shaft is attached to the tip of the main spindle on the rear side of the tool head. At this time, a liquid receiving device is provided that presses the valve stem backward to receive cutting fluid from the opening of the cutting fluid conducting valve device, and also engages with the cutting fluid conducting valve device to prevent rotation of the tool head. established,
An annular chamber for accommodating the cutting fluid received by the liquid receiving device is formed along the outer circumferential surface of the tool head, and an annular chamber is formed on the front side of the tool head to accommodate the cutting fluid received by the liquid receiving device. A machine tool characterized in that a nozzle is provided in a protruding manner corresponding to each of the sub-spindles, the proximal end of which is in communication, and the tip of which extends to the vicinity of a tool held at the distal end of each of the sub-spindles. A cutting fluid supply device for use is obtained.

(2) Operation When the tool head shaft of the tool head is attached to the tip of the main spindle, the liquid receiving device of the tool head pushes the valve stem of the cutting fluid conduction valve device on the main spindle head against the spring force. Pushing backward opens the cutting fluid conduction valve device and receives the cutting material from the opening of the cutting fluid conduction valve device. Cutting & cutting enters the annular chamber of the throat into the tool, fills the annular chamber evenly, flows into multiple nozzles, and the tool is held at the tip of the sub-spindle corresponding to each nozzle from the tip of each nozzle. It erupts intensively towards.

(3) Examples An embodiment of the present invention will be described below with reference to the drawings.

A main spindle 4 is rotatably supported in a hollow portion of a main spindle head 1 of a machine tool via a bearing 3 held by a bearing holder 2 .

A tapered shaft portion 7 of a tool head shaft 6 of a tool head 16 is fitted into a tapered hole portion 5 formed at the tip of the hollow portion of the main spindle 4 . A shaft end large diameter portion 9 is formed at the rear end of the retaining shaft portion 8 that protrudes rearward from the Taber shaft portion 7, and a chuck IO disposed within the hollow portion of the main spindle 4 is formed.
The tool head shaft 6 is prevented from being pulled out from the tip of the main spindle 4 by the engagement of the pull-out stop ball 11 with the shaft end large diameter portion 9. The shaft of the chuck 10 extends rearward, and a plate spring 12 is engaged with a flange (not shown) formed at the rear of the shaft, and the spring force of the temporary spring 12 causes the chuck to close. 10 is always subjected to a backward biasing force, but when the chuck 10 is moved forward against the spring force of the leaf spring 12 by a device (not shown), the ejection-stopping ball 11 causes the inner diameter to change. By falling into the large-diameter portion 13 with a large target, the tool head shaft 6
can now be removed from the tip of the main spindle 4. Further, a torque transmission arm 14 protrudes from the distal end surface of the main spindle 4, and when the tool head shaft 6 is attached to the distal end of the main spindle 4, the torque transmission arm 14 engages with the retaining portion of the tool head shaft 6. By doing so, the torque of the main spindle 4 is transmitted to the tool head shaft 6. Further, an engagement groove 15 is formed on the outer peripheral surface of the tool head shaft 6, and when removing the tool head shaft 6 from the tip of the main spindle 4, a removal tool is engaged with the engagement groove 15 and the tool is removed. The head shaft 6 can be removed from the tip of the main spindle 4.

On the front side of the tool head 16 that rotatably supports the tool head shaft 6, there is a sub spindle head 1 that rotatably supports a sub spindle 19 that holds the tool 21 at its tip.
A sub-spindle head 18 that rotatably supports a sub-spindle 20 that holds a tool 7 and a tool 22 at its tip end is provided in a protruding manner.

A cutting fluid communication valve device 23 having a valve chamber 24 is disposed on the side surface of the tip of the main spindle head l. The cutting fluid in the cutting fluid storage tank 25 is sent into the valve chamber 24 through a fluid feed pipe 27 by a pump 26. Inside the valve chamber 24, the valve body 28 is pressed against the pressure spring 29.
Since the valve body 28 is constantly pressed toward the valve seat 31 by the spring force of the valve body 28, the outflow path of the cutting fluid that has flowed into the valve chamber 24 is normally blocked by the valve body 28. The valve stem 30 of the valve body 28 penetrates the front wall of the cutting fluid conduction valve device 23 so as to freely connect to the front wall of the cutting fluid conduction valve device 23 and protrudes forward.
The opening 32 that communicates with the valve chamber 24 of No. 3 is formed so as to face forward and be shifted to the side of the valve stem 30.

On the rear surface side of the tool head 16, there is a liquid receiver provided with a cylindrical part 34 in which a through hole 35 penetrating in the front-rear direction is formed, and a pressing protrusion 36 protruding near the cylindrical part 34. Device 33
is installed. When the tool head shaft 6 is attached to the tip of the main spindle 4, the rear end of the cylindrical portion 34 comes into contact with the opening 32 of the cutting fluid communication valve device 23, and the opening 32 and the through hole 35 are connected to each other. At the same time, the pressing protrusion 36 comes into contact with the tip of the valve stem 30 and presses the valve body 30 backward against the spring force of the pressing spring 29, removing the valve body 28 from the valve seat 31. By separating the cutting fluid communication valve device 2
3 is in the open state. At this time, the cylindrical portion 34 is engaged with the cutting fluid conduction valve device 23 and serves to stop the tool head 16 from rotating.

The tool head 1 is located on the outer periphery of the tool head 16 near the front.
An annular chamber 38 is formed along the outer peripheral surface of 6. This annular chamber 38 communicates with the through hole 35 of the liquid receiving device 33 via a communication hole 37 formed in the outer peripheral wall of the tool head 16 . And on the front side of the tool head 16,
Along the annular chamber 38, each secondary spindle head 17.18
Nozzles 39 and 40 are provided in a corresponding manner. The proximal end of each nozzle 39.40 communicates with the annular chamber 38, and the distal end of each nozzle 39.40 is located close to the tool 21.22 held by the corresponding secondary spindle 19.20. It extends to

Therefore, when the tool head shaft 6 is attached to the tip of the main spindle 4, the cutting fluid sent from the cutting fluid storage tank 25 by the pump 26 passes through the fluid pipe 27, the valve chamber 24, the opening 32, and It flows into the annular chamber 38 through the hole 35 and the communication hole 37, and is evenly distributed to each nozzle 39.40 with a uniform pressure distribution in this annular chamber 38, and from the tip of each nozzle 39.40. Intensive jetting toward each corresponding tool. C1 Effects of the Invention As described above, according to the present invention, a cutting fluid communication valve device is disposed on the side surface of the tip of the main spindle head, and
A liquid receiving device is installed on the rear side of the tool head, and when the tool head shaft is attached to the tip of the main spindle, the liquid receiving device pushes the valve stem of the cutting fluid conducting valve device backward against the spring force. By pressing the cutting V & conduction valve device, the cutting fluid is opened and the cutting fluid is received from the opening of the cutting fluid conduction valve device, so the piping configuration for the cutting fluid can be simplified by the simple pipe joint configuration. Also, since an annular chamber is formed along the outer circumferential surface of the tool head, the cutting fluid flowing into the annular chamber fills the annular chamber and creates a uniform pressure. It is distributed evenly to each nozzle, and on the front side of the tool head,
Each sub-spindle is provided with a protruding nozzle whose base end communicates with the annular chamber and whose distal end extends close to the tool held at the tip of each sub-spindle, so that the cutting fluid flows into the annular chamber. To effectively spray water in a concentrated manner toward each tool without passing through a wasteful path from a chamber to each tool, and without scattering.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view of the main parts of a machine tool equipped with a cutting fluid supply device according to an embodiment of the present invention, and FIG. 2 is a front view of the main parts as seen from the direction of arrow H in FIG. Figure 3 is m in Figure 1.
It is a side view of the main part seen along the -m line. ■...Main spindle head, 4...Main spindle,
6... Tool head axis, 16... Tool head, 19,
20... Sub spindle, 21.22... Tool, 23
...Cutting fluid conduction valve device, 25...Cutting fluid storage tank, 30
... Valve stem, 32... Opening, 33... Liquid receiving device,
38...Annular chamber, 39.40...Nozzle patent applicant Honda Motor Co., Ltd. Figure 3 Figure 2

Claims (1)

[Claims] A tool head (16) rotatably supports a plurality of sub spindles (19, 20) at the tip of the main spindle (4).
) is removably attached to the tool head shaft (6), and rotation of the main spindle (4) causes each of the sub spindles (
19, 20) are configured to be rotationally driven, the main spindle (4)
The main spindle head (1) that rotatably supports the main spindle head (1) has a valve stem (30) that projects forward and an opening (32) that opens forward on the side surface of the distal end of the main spindle head (1). 30
) is pushed backward against the spring force, the valve opens and the cutting fluid sent from the cutting fluid storage tank (25) is transferred to the opening (32).
A cutting fluid conduction valve device (23) is provided on the rear side of the tool head (16), and the tool head shaft (6) is attached to the tip of the main spindle (4). When the valve stem (30) is pressed rearward to receive cutting fluid from the opening (32) of the cutting fluid conduction valve device (23), the valve stem (30) is engaged with the cutting fluid conduction valve device (23). A liquid receiving device (33) that also serves to prevent the tool head (16) from rotating is disposed, and an annular shaped liquid receiving device (33) is provided on the outer periphery of the tool head (16) to accommodate the cutting fluid received by the liquid receiving device (33). The chamber (38) is the tool head (16).
are formed along the outer circumferential surface of the tool head (16), and the proximal end side communicates with the annular chamber (38) on the front side of the tool head (16). A machine tool characterized in that nozzles (39, 40) extending close to the tools (21, 22) held in the machine tool are provided in a protruding manner corresponding to each of the sub-spindles (19, 20). cutting fluid supply device.