JPS6310906Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for supplying cutting oil to cutting tools of a multi-spindle exchangeable head machine tool.

More specifically, a cylindrical member to which cutting oil is supplied under pressure is provided to the jig member for fixing the workpiece, and a valve member provided on the cylindrical member is slidably connected to the cylindrical member by fitting into each head provided with a cutting tool. A connecting member is provided, and the sliding of the valve member opens the cutting oil flow passage and sprays cutting oil from the shower pipe arranged for each cutting tool, thereby appropriately supplying cutting oil to each cutting tool and processing. This invention relates to a cutting oil supply device for a multi-spindle head exchangeable machine tool, which aims to improve cutting performance, machining accuracy, and ensure tool life.

Each head is equipped with multiple cutting tools such as drills,
There are known multi-axis interchangeable head machine tools in which each head rotates along the same rotational trajectory to face the workpiece in turn, and the workpiece is machined using the cutting tools of each head that are exchanged during the machining process. It is being Cutting oil is supplied during machining of a workpiece, and a conventional cutting oil supply device for this type of machine tool was constructed as follows.

Each head rotates according to the processing process,
In order to change the position, the cutting oil supply member is installed on the immovable jig member that holds the workpiece fixedly, and the cutting oil supplied under pressure from the tank is sprayed from the jig member side to the cutting tool by this supply member. was. This jetting is done in a waterfall-like manner from above so that the cutting oil is applied to the cutting tools of each head that is being exchanged, but in practice it is difficult to properly spray and supply cutting oil to all the cutting tools of each head. This was difficult, and the cutting oil was not evenly supplied to the appropriate parts of the cutting tool. For example, cutting oil is difficult to apply to short cutting tools, and depending on the shape of the workpiece, there may be machining locations where cutting oil cannot be applied. In particular, even if cutting oil is supplied like a waterfall from above the workpiece fixing jig member as described above, if the cutting tool is a drill, the cutting oil will not enter the cutting hole of the workpiece that is being machined. As a result, the workpiece machinability and machining accuracy of the cutting tool are reduced, and the life of the cutting tool is shortened.

The present invention has been developed in view of the above-mentioned conventional problems and to effectively solve them.

The purpose of this invention is to supply cutting oil not from the workpiece fixing jig member side but from the head side equipped with cutting tools, and in addition to this, shower pipes are arranged in branches for each of the plurality of cutting tools attached to the head. ,
Cutting oil is ejected from each shower pipe to supply cutting oil to the appropriate positions of all cutting tools, thereby improving workpiece workability and machining accuracy, as well as ensuring the life of the cutting tools. The present invention provides a cutting oil supply device for a multi-spindle head exchangeable machine tool.

In order to supply cutting oil to the cutting tool from the head side as described above, the present invention provides a cylindrical member whose inside forms a part of the cutting oil flow passage in the workpiece fixing jig member, and the cylindrical member A valve member for opening and closing the cutting oil flow passage is slidably attached to the head, and each head is fitted and connected to a cylindrical member when the head is replaced and moved.
A connecting member is provided that presses and slides the valve member to open the cutting oil flow passage, and the connecting member of a specific head facing the workpiece and the cylindrical member of the jig member are fitted and connected, and the above-mentioned shower pipe of this head is connected. It is characterized by being able to spray and supply cutting oil to the cutting tool.

A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows an overall side view of a multi-spindle exchangeable head machine tool employing a cutting oil supply device according to the present invention. A jig member 2 is installed upright at the end of the base 1,
A work W is held and fixed on the front jig surface of this jig member 2. Base 1 facing the workpiece W in the horizontal direction
A mother machine 4 is arranged approximately in the center of the mother machine 4, and the mother machine 4 has four multi-axis heads 5 (one of which is on the back side) on its outer periphery. A cutting tool, in this example, a drill 6
Multiple pieces are planted and attached horizontally. Each of the heads 5 rotates along the same rotation locus around the vertical axis while maintaining a vertical posture, and faces the workpiece W in sequence. Each time the heads 5 individually face the workpiece W, a driving means 7 built into the mother machine 4 connects with a specific head 5 facing the workpiece W, and drives the drill 6 of this head 5 to rotate. Thereafter, the mother machine 4 including the head 5 moves forward in the direction of the workpiece W, and the drill 6 drills a hole in the workpiece W.

The above operations are performed for each head 5, and the workpiece W is sequentially machined in accordance with the machining process by each multi-axis head 5 in which the drill 6 is installed at a different position.

A supply pipe 8 extending from the cutting oil storage tank is attached to the workpiece fixing jig member 2, and this pipe 8
The terminal end of the jig member 2 is connected to a cylindrical member 9 protruding from the front surface of the jig member 2 in the direction of the head 5 . As shown in FIG. 2, the cylindrical member 9 is formed in a hollow shape so that cutting oil flows therein, and forms a part of a cutting oil flow passage. The pipe 8 is attached to the upper surface of the base 9a fixed to the jig member 2.
It has an opening 9b to which is connected. A piston-shaped sleeve 10 having an annular protruding step 10a is slidably assembled inside the cylindrical member 9, and the locking ring 1 limits the sliding movement of the sleeve 10 in the direction of the head 5.
Regulated by 1. A spool valve 12 is further slidably assembled inside the sleeve 10. This spool valve 12 has a small diameter part 12a at the front and a large diameter part 12b at the rear.
These small and large diameter portions 12a and 12b are divided by a partition wall 12c, the small diameter portion 12a is hollow with an open front surface, and the large diameter portion 12b is hollow with an open rear surface. A coil spring 13 is disposed inside the large diameter portion 12b, and the rear end of the spring 13 is brought into contact with the lid member 14 fitted to the rear surface of the sleeve 10, and the elastic force of the spring 13 causes the spool valve 12 to move in the five directions of the head. Gives forward force to.

A stepped portion 10b is formed at a suitable position on the inner surface of the sleeve 10, and the front end of the large diameter portion 12b of the spool valve 12 is brought into contact with this stepped portion 10b, thereby regulating the forward position of the spool valve 12, so that the spool valve 12 10 and not exposed to the outside.

A passage 10c is formed in the annular protruding step 10a of the sleeve 10, and the passage 10c is bent rearward so as to open toward the inner chamber _S1 of the cylindrical member 10, which forms a part of the cutting oil flow passage. At the same time, the other end surface of the passage 10c is opened to the inner circumferential surface of the cylindrical member 10.
Further, the small diameter portion 12a of the spool valve 12 has a valve hole 12.
d is provided, and the stepped portion 1 regulates the forward position of the spool valve 12 which is elastically biased by the spring 13.
0b is formed in the front portion closer to the head 5 than the passage 10c, so that the passage 10c and the valve hole 12d do not communicate with each other at the forward limit of the spool valve 12, thereby blocking the cutting oil flow passage.

A connecting member 15 is fixed horizontally to the upper part of the outer surface of the head 5 to which the drill 6 is attached, and this connecting member 15 is formed in a hollow shape as shown in FIG.
Cutting oil can flow into the interior chamber _S2 .
This inner chamber _S2 is bent into an L shape, and one end is connected to the connecting member 1.
5 is opened at the tip of the pressing portion 15a which protrudes in the horizontal direction, and the other end is opened at the upper surface of the base portion 15b to which the connecting member 15 is fixed to the head 5. Pressing part 15a
has the same diameter as the small diameter portion 12a of the spool valve 12,
It is adapted to be inserted into the inner hole of the sleeve 10. As shown in FIG. 1, a shower pipe 16 is connected to the connecting member 15, and the shower pipe 16 is connected to an end opening 15c of the inner chamber _S2 opened at the base 15b of the connecting member 15. shower pipe 16
consists of a trunk pipe 16a and a plurality of branch pipes 16b..., and a branch pipe 1 branched from the trunk pipe 16a.
The number of branch pipes 6b is the same as the number of drills 6 included in the head 5, and the branch pipes 16b are arranged separately for each drill 6.

In particular, this branch pipe 16b is inclined toward the cutting edge side of the drill 6, so that cutting oil can be jetted into the cutting hole when drilling a hole in the workpiece W using the drill 6, which will be described later.

The connecting members 15 described above are provided on all four heads 5, and their mounting positions are all the same, so that each head 5 faces the workpiece W, which is rotationally moved and fixedly held on the jig member 2. At this time, each of the connecting members 15 faces the cylindrical member 9, sleeve 10, and spool valve 12 of the jig member 2 with the same horizontal axis, and the connecting member 15 and the cylindrical member 9 are fitted together. Can be connected.

Next, we will discuss the effect.

The inner chamber S ₁ of the cylindrical member 9 provided in the jig member 2 is filled with cutting oil which is supplied under pressure from a tank by a pump means through the pipe 8 . Due to the rotational movement, a specific head 5 faces the workpiece W, and when this head 5 moves forward as described above, the connecting member 1
As shown in FIG. As the head 5 moves further forward, the pressing portion 15a pushes the spool valve 12 against the spring 13.
12 against the elastic force of the sleeve 1.
Slide backward within 0. A retreating force is generated in the sleeve 10 as a reaction force of the spring 13, but
The pressure of the cutting oil filling the cylindrical member 9 prevents the piston-length sleeve 10 from retreating. In this way, only the spool valve 12 slides backward by the pressing action of the pressing portion 15a.

When the spool valve 12 comes into contact with the lid member 14 attached to the rear surface of the sleeve 10 and reaches the retraction limit, the passage 10c of the sleeve 10 and the valve hole 12d of the spool valve 12 are aligned and communicate with each other, that is, the spool valve 12 The cutting oil flow passage that had been blocked by the cylindrical member 9 is now open, and the cutting oil supplied to the inner chamber S ₁ of the cylindrical member 9 flows through the passage 10c, the valve hole 12d, the inside of the small diameter portion 12a of the spool valve 12, and the inside of the connecting member 15. After passing through each chamber _S2 , it begins to eject from the branch pipes 16b of the shower pipe 16.

Up to this point, drilling of the workpiece W by the drill 6 has not been started, and cutting oil is supplied to the drill 6 before this drilling.

As the head 5 continues to move forward, the front end of the base 15b of the connecting member 15 comes into contact with the front end of the sleeve 10, and the base 15b of the partial sleeve 10 comes into contact with the front end of the sleeve 10.
begins to slide backward within the cylindrical member 9. When the sleeve 10 begins to retreat, the drill 6
The hole-drilling process for this W starts when it comes into contact with the W. As the head 5 moves forward, the drill 6 drills a hole in the work W, and during this process, the passage 10 of the sleeve 10
In order to maintain a communication state between c and the valve hole 12d of the spool valve 12, cutting oil is jetted and supplied from each branch pipe 16b of the shower pipe 16 to each drill 6 attached to the head 5, as described above. Since the branch pipe 16b is inclined, cutting oil is injected into the cutting hole of the workpiece W being machined, and the cutting pieces are effectively discharged.

As shown in FIG. 3, when the sleeve 10 is retracted to the same position as the front end surface of the cylindrical member 9, the machining of the workpiece W is completed, and the head 5 then returns to its previous position.
Therefore, the backward stroke of the sleeve 10 is the same as that of the drill 6.
This is the hole drilling length. As the head 5 returns, the sleeve 10 moves forward and returns to the position shown in FIG.
0c and the valve hole 12d are misaligned, blocking the cutting oil flow path.

When the head 5 rotates and is replaced, the next head 5 faces the workpiece W, and when this head 5 moves forward, the same operation as above is repeated, and when processing the workpiece W, the plurality of heads 5 equipped with Cutting oil is supplied to each of the drills 6 from a branch pipe 16b formed into the same number of branches as the drills 6 of the shower pipe 16.

In this way, the workpiece W is processed according to the same number of processing steps as the head 5, and cutting holes are bored at predetermined positions.

As described above, in this embodiment, the sleeve 10 and the spool valve 12 are slidably assembled inside the cylindrical member 9 to which the connecting member 15 of the head 5 is fitted and connected to open and close the cutting oil flow passage. I did it like that. The number of valve members incorporated in the cylindrical member 9 for opening and closing this cutting oil flow passage may be only one spool valve, unlike this embodiment. However, if there are two sliding members, a sleeve and a spool valve, as in this embodiment, and a double structure is used, the length of the spool valve can be shortened compared to the case of only a spool valve, which is convenient in practice. .

As is clear from the above description, according to the present invention, the workpiece fixing jig member is provided with a cylindrical member through which cutting oil is fed under pressure, and this cylindrical member is provided with a slidable valve member that opens and closes the cutting oil flow passage. Since each head is provided with a connecting member that fits and connects with the cylindrical member and presses and slides the valve member, when machining the workpiece, the cutting oil flow passage is opened by sliding the valve member with this connecting member. Cutting oil can be sprayed and supplied to the cutting tool from the shower pipe installed in the head, and this shower pipe has the same number of branches as the cutting tool.
Cutting oil can be reliably supplied to the appropriate position of the cutting tool, and this can be done even when the head rotates and the head is replaced. Cutting oil can be supplied from each head side in multi-spindle replaceable head machine tools. In this way, it is possible to improve the machinability and machining accuracy of the workpiece by the cutting tool, and by extension, the life of the cutting tool can be improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Fig. 1 is an overall side view of a multi-spindle head exchangeable machine tool, and Fig. 2 is a partially enlarged view of Fig. 1, showing how the connecting member and the cylindrical member fit together. FIG. 3 is a cross-sectional view at the time of starting the connection, and is a cross-sectional view showing a state in which the valve member slides to open the cutting oil flow passage and the workpiece is processed by the cutting tool. In the drawing, 2 is a jig member for fixing the workpiece, 5 is a head, 6 is a drill which is a cutting tool, 9 is a cylindrical member, 12
1 is a spool valve which is a valve member; 15 is a connecting member; 1
6 is a shower pipe, and W is a workpiece.

Claims (1)

[Scope of utility model claims] A machine tool consisting of a plurality of heads equipped with a plurality of cutting tools and a jig member for fixing and holding a workpiece, and in which an arbitrary head is horizontally rotated to a position facing the workpiece and the workpiece is processed with the cutting tool, The jig member includes a cylindrical member protruding in the direction of the head, a cutting oil supply pipe is connected to the cylindrical member, and the inside of the cylindrical member is part of a cutting oil flow passage through which cutting oil is supplied under pressure, and the A sleeve having a passage communicating with the cutting oil flow passage is fitted into the cylindrical member so as to be slidable in the direction of the head, and a valve member for opening and closing the passage of the sleeve is biased in the direction of the head so as to be slidable in the sleeve. the respective heads are fitted and connected to the sleeves by advancing the head toward the workpiece, and press and slide the valve member toward the workpiece to open a cutting oil flow passage through the passage; Furthermore, a connecting member is provided that presses and slides the sleeve toward the workpiece with the cutting oil flow passage open, and the connecting member is hollow so that the cutting oil can flow therein, and a shower branch is provided for each of the cutting tools. A cutting oil supply device for a multi-spindle head exchangeable machine tool characterized by a pipe connection.