JPS6059102B2 - Multi-purpose machine tool - Google Patents

Description

[Detailed Description of the Invention] Conventionally, surface processing in machining that requires high precision or compatibility has been
In some cases, it is processed using only a broach, and in other cases, it is roughly cut with a milling cutter and then finished with a broach.

When machining with only a broach, depending on the size of the machining allowance and the rigidity of the workpiece, the broach becomes extremely long and the machine itself becomes large.Especially in the case of a vertical machine, it is necessary to dig a pit and build the foundation. In addition to the need to harden the broach, additional equipment such as a hoist or crane is required for broach replacement work. In addition, there were many problems such as a decrease in machine operating rate due to broach replacement. In addition, continuous broaching machines, etc., process a jig pallet on which the workpiece is fixed while continuously transporting it with a chain. Although productivity is high, it requires a large machine space compared to the size of the workpiece. Ancillary equipment such as supporting and driving equipment will also increase. In addition, there are many workpieces held in the machine, so it is wasteful. In addition, if finishing is performed with a broach after rough cutting with a milling cutter, the number of steps increases, a conveyance device connecting the steps is also required, and a large space is required as in the former case. On the other hand, regarding the feed mechanism, in order to fully satisfy both the relatively slow cutting feed rate required for milling and the fast cutting feed rate required for proching, the conventional hydraulic feed mechanism requires
It requires a complex hydraulic circuit, and the hydraulic unit itself requires a fairly large capacity tank.The associated maintenance is also troublesome, and sufficient consideration must be given to noise, heat generation, oil leakage, etc. . The present invention relates to a highly efficient compound machine tool that compactly combines rough machining with a milling cutter and finishing machining with a probing cutter into one machine, thereby eliminating the problems of the conventional products.

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

A milling shaft head 3 and a proach holder 4 are fixed adjacent to a tool rest 2 placed on a base 1 along the same feed axis directions X and Y.

A work table 9 on which a workpiece fixture 8 is mounted is incorporated in the sub-base 7 that is erected on the base 1 facing the tool rest 2. Also, as shown in FIG. A DC servo motor 12 is attached to the rear end (right end in the drawing) of the motor 1, and transmits rotation to a ball screw 22 via gears 20 and 21. On the other hand, a nut 23 screwed into a ball screw 22 is fixed to the lower surface of the work table 9, and the work table 9 can be moved along the sub-base 7 by rotation of the DC servo motor 12. ing. The work 10 is clamped by clamp metals 17 and 18 operated by a cylinder 11 fixed to the work fixture 8. Incidentally, the cylinder 11 can also be attached to the workpiece mount 8 perpendicularly to the feed axis direction X-Y, as shown by an imaginary line 19. 13 is an electric motor for driving the milling shaft head, 14 is a cutting oil tank, and 15 is a chip conveyor installed between the tool post 2 and the work table 9, all of which are arranged along the same feed axis direction X-Y. It is located.

Also, 16 is the operation panel attached to the base 1! and is placed on the machine surface. At the rear (upper part in FIG. 2) of the workpiece fixture 8, as shown in detail in FIG. 5, a chip removal device is provided in which a pair of elastic rollers 24 made of urethane rubber or the like are pressed against the cutting edge of the proach by a spring 25. Equipment is provided. When the operator located at the front of the machine (lower side in Figure 2) loads the work 10 into the work fixture 8 and then operates the start push button on the operation panel 16, the cylinder 11 moves the clamp metals 17 and 18 to the clamp side. The workpiece 10 is clamped.

The milling shaft head 3 is driven by an electric motor 13, and the milling cutter 5 rotates. At the same time, cutting oil is drawn up from the cutting oil tank 14 and poured into the pre-cutting area. Then, the DC servo motor 12 is activated to move the work table 9 to the second
The feed is fed in the direction of the arrow along the feed axis direction X-Y in the figure, rapidly fed to just before the milling shaft head 3, and cutting feed started a little before milling. In the milling process, part A of the workpiece 10 shown in FIG.
After the milling process is completed, the cutting feed is switched to the probing cutting feed, and the finishing process of part A is performed. When all the cutting work is completed, the cylinder 11 operates and the clamp metals 17 and 18
is unclamped, and the workpiece 10 is discharged at the cutting completion position. After that, the cylinder 11 moves the clamp metals 17 and 18 again to the clamp side to a position where there is no interference with the cutting tool, and then the work table 9 is returned quickly to complete the machining cycle. During this time, the work table 9
At the original position, a pair of elastic rollers 24 made of urethane rubber or the like disposed between the milling cutter 5 and the prong 6 are moved by the pressing force of the spring 25 via the fulcrum pin 26.
By gripping the cutting edge of the proch 6 and rolling it on the upper and lower surfaces of the proch 6, the chips accumulated on the proch 6 are brushed off. In this invention, as described above, the milling cutter and proach are arranged and fixed adjacent to each other in the same feed axis direction, and the workpiece is fixed to the table side, so that milling and proching can be performed by chucking the workpiece only once. Therefore, it is easy to operate and achieve high accuracy, making it suitable for machining workpieces with large machining allowances and workpieces that are easily deformed.

In addition, with the advent of highly productive and highly durable tools such as roughing cutters in recent years, it is possible to increase the machining allowance during milling. Improved accuracy can be measured. Furthermore, since the machining allowance for proching is small, the overall length of the proach can be significantly shortened, so the machine can be configured compactly and the cutting tool can be easily replaced. In addition, since the milling process can be followed by the proching process, unnecessary strokes are eliminated, and wasteful workpiece conveyance can also be eliminated. Furthermore, since the workpiece is fixed to a jig on the table and moved in the front-back direction by the feeding mechanism, the overall width of the machine can be reduced, and the overall length of the processing line can be shortened. In addition, workpieces can be easily attached and detached from the front of the machine, improving work efficiency.The work position is low and the machine itself is compact, allowing for a stable structure. This eliminates the need to dig and makes it easier to relocate the machine. Further, by using a ball screw feeding mechanism using a DC motor as the feeding mechanism, not only piping is unnecessary, but also reliability, maintainability, and operational performance can be improved.

Furthermore, the responsiveness of speed switching and the safety of cutting feed can be ensured, and shortening of cycle time, improvement of productivity, and improvement of tool life can be expected. It goes without saying that if the blade attachment part has a gate-shaped structure, the blade can be attached to three sides, making it possible to perform multi-sided cutting.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a sectional view taken along the line ■-■ of Fig. 2, and Fig. 4 A is a front view of the workpiece. , an enlarged view of the machined surface, and FIG. 5 is a schematic diagram of the chip removal device. 1...base (main body), 2...turret, 3
...Milling shaft head, 4... Proach holder, 5... Milling cutter, 6... Proach, 7... Sub base, 8. ...Work fixture, 9...Work table, 10...
・Work, 11...Cylinder, 12...
DC servo motor, 13... Cutter drive electric motor, 14... Cutting oil tank, 15... Chip conveyor, 16... Operation panel, 17, 18...
・・Clamp metal, 19・・・・Cylinder, 20, 21・
...Gear, 22...Ball screw, 23...
...Nut, 24...Roller, 25...
...Spring, 26...Fulcrum pin.

Claims (1)

[Claims] 1. A machine base, a work table supported movably in the feed axis direction by a drive device on the machine base and to which a work is fixed, and a tool rest supported on the machine base that engages with the work. A multifunctional machine tool comprising: a milling cutter and a broach that are arranged and fixed in sequence adjacent to each other in a workpiece feeding direction. 2. The work table is a reciprocating drive device, which includes a DC motor having a speed conversion function, a ball screw driven by the DC motor, and a nut fixed to the work table and engaged with the ball screw. A multifunction machine tool according to claim 1, which is driven by a drive device including: 3. The work table has an elastic roller for removing chips which is fixed adjacent to the work and is arranged so as to be able to come into contact with the cutting edge of the broach by being pressed by an elastic means when the work table is moved in the counter-work feed direction. A multifunction machine tool according to claim 2, comprising: 4. The compound machine tool according to claim 1, wherein the blade mounting portion has a gate-shaped structure.