JPS60167737A - Self-propelled tool changing device - Google Patents

Abstract

PURPOSE:To simplify overall structure of a machining center by adopting a structure which eliminates requirement for parts such as an intermediate shifter and the like delivering a tool between a tool magazine and a tool changing arm. CONSTITUTION:An arm traveling truck 10, which supports on a guide rail 9, a swaying arm part 16 provided with a tool changing arm 19 in free swaying and driving configuration, is movably provided along the guide rail 9, and further engaging members such as a chain and the like are also provided along said rail 9 and furthermore traveling driving means such as a hydraulic motor or the like, in engagement with a chain, is provided on the traveling truck 10. Therefore, driving of the traveling driving means enables the arm traveling truck 10, and also the tool changing arm 19 accordingly, to make traveling movement along the guide rail 9 freely between a tool magazine 5 and a main shaft. This eliminates requirement for parts such as an intermediate shifter and the like which performed in the past a delivery of a tool 6 between the tool magazine and the fixed tool changing arm, and the overall structure of a machining center can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) 0 Technical Field of the Invention The present invention relates to a self-propelled single tool changing device that performs nine tool changing operations in a machining center.

(b) Background of the Technology It is desirable that a tool changer used in a machining center has a structure that is as simple as possible and is less prone to troubles such as breakdowns.

(C), Prior Art and Problems Conventionally, a tool changer installed in a vertical machining center has an intermediate shifter that transports the tool from the tool magazine to the tool change arm, and a tool exchanger between the intermediate shifter and the main shaft. Although the tool exchange arm is composed of two main parts, the intermediate shifter and the EVA exchange arm, the provision of the two main parts has the disadvantage of complicating the structure of the machining center. In addition, since the tool change arm is installed near the spindle, chips and cutting water from cutting tools attached to the spindle tend to adhere to it, which can cause arm malfunction. In the past, there were devices that simply moved the tool change arm between the tool drum and the main shaft using a reciprocating drive means such as a cylinder on a straight rail, eliminating the intermediate sick. This has the disadvantage that the longer the rail, the larger the reciprocating drive means, and the disadvantage that it cannot be applied to curved rails.

Furthermore, in a so-called vertical machining center where the tools stored in the tool magazine are installed with their axes facing horizontally at the tool exchange position, and the spindle's axis is directed vertically, simply Even if the tool exchange arm moves on the rail, there is a problem in that the tool cannot be exchanged.

(d) 0 Purpose of the Invention In order to eliminate the above-mentioned drawbacks, the first object of the present invention is to provide a self-propelled single tool changer that does not require an intermediate shifter and can simplify the configuration of a machining center. The second objective is to provide a highly reliable self-propelled one-piece changer that is less affected by the harmful effects of chips and cutting water during cutting, and also has a long length. The third objective is to provide a self-propelled single tool changer that can easily use guide rails and curved guide rails. The fourth object is to provide a traveling type one tool changing device.

(e) Configuration of the Invention In other words, the present invention provides a guide rail to communicate between the two tool magazines and the main shaft, and
An arm traveling trolley in which a swinging arm portion provided with a tool changing arm is supported on the guide rail so as to be swingable;
It is configured such that it is movably mounted on a guide rail, further an engaging member is provided along the guide rail, and a traveling drive means is provided on the arm traveling truck in a manner that engages with the engaging member. Ru.

(Margin below) (f) 0 Examples of the invention Examples of the present invention will be described below based on the drawings. will be explained in detail.

FIG. 1 is a plan view showing an example of a vertical machining center to which an embodiment of the self-propelled one-piece changer according to the present invention is applied, FIG. 2 is a side view of FIG. 1, and FIG. 3 shows the rails. A perspective view, FIG. 4 is a front view showing an embodiment of the self-propelled single-tool changing device according to the present invention, FIG. 5 is a side view of FIG. 4, and FIG. 6 is a diagram showing the operation of the self-propelled single-tool changing device. Figure 7 is a perspective view showing the insertion and removal of tools between the self-propelled single tool changer and the tool magazine, and Figure 8 is a perspective view of the tool between the self-propelled single tool changer and the machining center spindle. FIG.

As shown in FIG. 1, the vertical machining center 1 has a column 2, and the spindle head 3 is attached to the column 2 via guide rails 2a, 2a in a direction perpendicular to the plane of the paper, that is, in an up-down direction Lr u m+ Iffm+ white & 17
" fi +-) a J-+ f 1%! A main shaft 21 is provided on Shihuishan 663 with its center aligned with the main shaft axis CL, and furthermore, in column 2, as shown in FIG. And as shown in FIG. 7, a chain-shaped tool magazine 5
is provided so as to be movable and driven in the directions of arrows A and B. A large number of tool holders 5B are installed in the worker magazine 5, and a tool 6 used by the machining center 1 for machining is stored in each tool holder 5a with its axis directed in the horizontal direction. The tool 6 mounted on each tool holder 5a is mounted so as to be freely inserted and removed in the axial direction thereof, that is, in the directions of arrows C and D in FIG.

On the other hand, the column 2 is provided with a support bracket 7, as shown in FIG. It is provided. As shown in FIG. 3, the guide rail 9 is bent into an L-shape and is formed in a T-shape. At the bottom of the guide rail 9 in the figure,
A chain 9a, which is a string-like engagement member, is stretched and fixed over the entire length of the guide rail 9. The guide rail 9 has
As shown in FIGS. 4 and 5, the arm carriage 10 is moved in the directions of arrows E and F along the guide rail 9 by a plurality of guide rollers 11 rotatably supported on the arm carriage 10. It is freely suspended and supported, and a hydraulic motor 12 is installed on the arm traveling trolley 10. A sprocket 12b is fitted onto the output shaft 12a of the hydraulic motor 12, and the sprocket 12b is engaged with a chain 9a on the guide rail 9. Further, the arm traveling truck 10 is provided with a hydraulic actuator 13 in which a cylinder 13a is formed, and the cylinder 13a has a piston 1.
A rod 13c is provided so as to be able to protrude and retract in the directions of arrows G and H via the rod 3b.

In addition, at the lower part of FIG. 4 and FIG.
0 a is formed, and arm portions 10 a, 10
The swinging arm portion 16 is shown in arrow 1.a. Axis 15.1 in J direction
5, it is swingably supported. An arm 15a is fixed to the shaft 15 on the left side of FIG.
The tip of the rod 13c of the hydraulic actuator 13 is pivotally connected. Therefore, when the rod 13b protrudes and retreats in the directions of the arrows G and H, the swinging arm portion 16 is driven to swing in the directions ① and J via the shaft 15 of the arm 15a1.

The swinging arm portion 16 has a main body 17 provided with a shaft 15, and the main body 17 has a tool changing arm 19 formed with tool gripping portions 19a at both ends.
7 is protruded and retracted from the main body 17 via a reciprocating drive mechanism using a cylinder piston and a rotating mechanism such as a torque actuator (not shown).
TR right r611r station movable - and 180 in the direction of arrows M and N
It is provided so that it can rotate freely over a range of degrees. Note that the number 20 is a dustproof cover that covers the arm traveling carriage 10 portion.

Since the vertical machining center 1 has the above configuration, when exchanging the tool 6 between the spindle 21 of the spindle head 3 and the tool magazine 5, the hydraulic motor 12 of the arm traveling carriage 10 is first driven. to rotate the sprocket 12b in a predetermined direction. Then, the chain 9a meshing with the sprocket 12b moves the arm carriage 101, the guide roller 11, and the guide rail 9 in the direction of the arrow E in FIG. 1, that is, the tool magazine 5.
Start moving in the direction. When the arm traveling carriage 10 moves in the E direction, the swinging arm section 16 supported by the arm traveling carriage 10 also moves in the E direction, but at this time, pressure oil is supplied to the boat 13d of the hydraulic actuator 13 to move the piston. 13b1, therefore, the rod 13C is made to protrude in the H direction along the cylinder 13a. Then, N via arm 15a
15 rotates 90° in the J direction, and the swing arm 16 also rotates along axis 1.
Rotate 900 times in the J direction around 5. As a result, the swinging arm section 16 is moved to the tool changing arm 1 shown in solid line in FIG.
9 is rotated from a first position LCI, in which the tip 19b faces downward in the figure, to a second position LC2, shown by an imaginary line in the figure, in which the tip 19b faces in the horizontal direction.

In this state, the arm traveling cart 1o travels in the direction of the tool magazine 5, and as shown in FIG. Appropriate tool holder 5
When facing point a, the driving of the hydraulic motor 12 is stopped, and movement in the E direction via the sprocket 12b and the chain 9a is stopped. The tool magazine 5 is loaded until the tool exchange arm 19 is positioned at the tool exchange position X.
Tool 6 that should be replaced by moving the magazine 5 in directions A and B
Since the installed tool holder 5a is positioned at position X, the tool gripping portion 19a of the tool changing arm 19
When the tool 6 reaches the position
It is fitted and engaged through c. In this state, when the tool exchange arm 19 is projected in the direction indicated by the arrow, the tool 6 in the tool holder 5n is pulled out from the tool magazine 5 in the L (C) direction by the tool gripping portion 19a.

Next, the hydraulic motor 12 is rotated in the opposite direction to the previous direction, and the arm traveling carriage 10 is now fixed to the guide rail 9 in the F direction and starts traveling via the sprocket 12b1 chain 9. When the arm traveling carriage 1o moves in the F direction, the swing arm portion 16 also moves in the F direction, and the tool 6 held by the tool gripping portion 19a is conveyed in the direction of the spindle 21 of the spindle head 3. During the conveyance of the tool 6 in the F direction, the tool exchange arm 19 is retreated in the direction, and pressure oil is supplied to the port 13e of the hydraulic actuator 13 to cause the piston 13b to retreat in the G direction together with the rod 13c. Then, the swing arm part 16 rotates 90 degrees in one direction about the shaft 15 via the arm 15a1 shaft 15, and the swing arm part 16 moves from the second position fiLC2 to the first position fiLC2.
The tool changing arm 19 returns to position LCI, and the tool changing arm 19 is maintained in a horizontal state as shown by the solid line in FIG.

In this state, when the arm carriage 10 further moves in the direction F, the empty tool gripping part 19a holds the mounted tool 6 on the main shaft 21ζ of the main spindle head 3 through the opening 19c, as shown in FIG. Grip and engage. Therefore, the tool exchange arm 19 is made to protrude in the L direction, and the tool change arm 19 is again made 180 degrees
Reverse it, remove the tool 6 attached to the main shaft 21,
Instead, go to the 5th or lth tool magazine and τ%? ,=T! 6tp
It is made to face the key shaft 21. Next, when the tool exchange arm 19 is moved backward in the direction, the tool 6 transferred from the tool magazine 5 is inserted and set on the main shaft 21. When the setting of the new tool 6 on the main shaft 21 is completed, the hydraulic motor 12 is driven again, and the arm traveling cart 10 is moved to the swinging arm section 16.
The tool 6 was also retracted in the E direction and extracted from the main spindle 21.
is returned to a predetermined tool holder 5a of the tool magazine 5.

That is, the second tool magazine 5 positions the tool holder 5a in which the tool 6 extracted from the main shaft 21 is to be stored at the tool exchange position 16 to the second position L
Position C2. Therefore, the tool exchange arm 19 is made to protrude in the L direction, and the used tool 6 held by the tool exchange arm 19 and the tool holder 5 that is already in the positioned state are removed.
a to face each other. Further, when the tool exchange arm 19 is retreated in the direction, the used tool 6 in the tool gripping section 19a is stored in a predetermined tool holder 5a. When the used tool 6 is stored in the tool holder 5a, the arm carriage 10 is moved slightly in the F direction and returned to the standby position, and while waiting for the machining by the tool 6 on the main spindle 21 to be completed, the tool magazine is 5 in directions A and B to position the tool 6 to be used for the next machining at the tool exchange position X.

In addition, in the above-described embodiment, the chain 9 is used as the engagement member installed along the guide rail 9.
Although we have described the case where the engagement member is not limited to the chain 9a, it goes without saying that a timing belt or the like made of a flexible material such as rubber may be stretched. It is also possible to directly form a rack or the like in a toothed t-shape. Furthermore, it goes without saying that the engagement member does not necessarily need to be directly provided on the guide rail 9 as long as it is provided along the guide rail 9.

Further, the traveling drive means mounted on the arm traveling trolley 10 is not limited to the hydraulic motor 12, but may be an electric motor or other suitable configuration.

Furthermore, the self-propelled one-tool changing device W8 according to the present invention is not limited to a so-called vertical machining center in which the main shaft 21 is provided in the vertical direction as in this embodiment, but can also be applied to a horizontal machining center in which the main shaft is provided in the horizontal direction. Of course, the present invention can also be applied to machining centers.

(g) 0 Effects of the Invention As described above, according to the present invention, the arm traveling trolley 10 supports the swinging arm portion 16 provided with the tool exchange arm 19 on the guide rail 9 so as to be swingable. is provided movably along the guide rail 9, and an engaging member such as a chain 9a is provided along the guide rail 9, and furthermore, a traveling drive means such as a hydraulic motor 12 is provided on the arm traveling trolley 10. Since it is provided in a form that is engaged with the engaging member, by driving the traveling drive means, the arm traveling carriage 10, and thus the tool changing arm 19, is moved along the guide rail 9 via the engaging member. It is now possible to move the tool 6 freely between the magazine 5 and the main shaft 21, eliminating the need for parts such as an intermediate shifter that conventionally transfers the tool 6 between the tool magazine 5 and the fixed tool exchange arm 190. 1 can be simplified.

Furthermore, since the swinging arm portion 16 is swingably supported with respect to the arm traveling carriage io+, the main shaft 21 is oriented in the vertical direction, and the axis of the tool 6 mounted on the tool machining machine 5 is aligned with the tool exchange position X. It is possible to easily change tools for the so-called vertical machining center 1 (ζ), which is oriented in the horizontal direction.The swing angle range of the arm portion 16 in the l and J directions is limited to 90' in this embodiment. First, it goes without saying that it can be set at any angle depending on the storage manner ζ of the tools 6 in the tool magazine 5B (that is, even if the axial center of the tools 6 does not face horizontally at the exchange position X).

In addition, while the main spindle 21 is machining a workpiece, the tool exchange arm 19 and the arm traveling cart 10 are placed on standby at a position away from the main spindle 21.
It is possible to eliminate as much as possible the harmful effects of chips and cutting water caused by the machining of the tool 6 attached to the tool 1, and there is less arm malfunction.
Therefore, it is possible to provide a highly reliable self-propelled one-tool exchange installation pass 8.

Furthermore, since the arm traveling trolley 10 can travel on the guide rail 9 by itself using the traveling drive means mounted on itself, even if the guide rail 9 is formed in a curved shape as shown in FIG. Or, even if it is formed in a twisted shape, it is still possible to run, and even if the length of the guide rail 9 becomes longer, the size of the self-propelled one-tool exchanger M8 itself cannot be increased in any way. It is possible to respond without any problems. Therefore, the tool 6 can be transferred between any tool magazine 5 and the main shaft 21 by traveling between a plurality of tool magazines 5.
The system has extremely high expandability.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of a vertical machining center to which an embodiment of the self-propelled one-piece changer according to the present invention is applied, FIG. 2 is a side view of FIG. 1, and FIG. 3 shows the rails. A perspective view, FIG. 4 is a front view showing an embodiment of the self-propelled one-item changer according to the present invention, FIG. 5 is a side view of the last figure, and FIG. Figure 7 is a perspective view showing the insertion and removal of tools between the self-propelled single tool changer and the tool magazine, and Figure 8 is a perspective view of the tool between the self-propelled single tool changer and the machining center spindle. It is a perspective view showing the punching situation of. 1... Machining center 5... Tool magazine 6... Tool 8... Self-propelled single tool changer 9... Guide rail 9a... ...Engagement means (chain) 10...
Arm traveling trolley 12... Traveling drive means (hydraulic motor) 12b...
...Traveling drive means (sprocket) 16 ... Swing arm section 19 ... Tool exchange arm 21 ... Spindle applicant Yamazaki Iron Works Co., Ltd. Agent Patent attorney Phase 1 ) Shinji (and 1 other person) Figure 8 Procedural Amendment (Method) 1. Display of the case 1982 Patent Application No. 18737 2 Name of the invention Self-propelled one-tool changing device 3 Person making the amendment Relationship to the case Patent applicant Address 1, Oaza Korou Boarding Boat, Oro-cho, Niwa-gun, Aichi Prefecture Name (
Name) Yamazaki Iron Works Co., Ltd. Representative Teruhiko Yamazaki 4 Agents

Claims (1)

[Scope of Claims] In a machining center having a tool magazine and a main spindle, a guide rail is provided to communicate between the tool magazine and the main spindle, and a swinging arm portion provided with a tool changing arm is provided on the guide rail. An arm traveling carriage supported in a dynamically drivable manner is provided so as to be movable along a guide rail, and an engaging member is further provided along the guide rail, and a traveling drive means is provided on the arm traveling carriage so as to be movable along a guide rail. Self-propelled type 1 set configured by engaging with