JPS6228141A - Tool socket transfer device - Google Patents

Abstract

PURPOSE:To simplify the constitution by allowing a single fluid pressure cylinder to perform two actions, i.e. gripping and release of a tool socket and its transport between two positions. CONSTITUTION:A swing arm 47 is installed on a base, and reciprocates with a rotational center 45 as fulcrum, and a fluid pressure cylinder 49 drives the swing arm 47 into reciprocation. A socket gripper 51 is fitted at the tip of said swing arm 47, and reciprocates along a guide rail 53 fixed at the oversurface of the base when the tool socket is transported. When an expansion rod 55 of said fluid pressure cylinder 49 is elongated, the swing arm 47 moves with socket gripper 51 to the tool exchange position 39, and when contracted, the arm moves with the same to the tool socket handover position.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a tool socket transfer device in a tool changing device for a machine tool, and in particular to a tool socket transfer device for a tool changing device of a machine tool, and in particular for a machine tool with a tool magazine having a plurality of cartridges each having a plurality of tool sockets. This invention relates to a tool socket transfer device installed on a machine.

[Prior art]

It is already well known that tool changing devices for machine tools store a large number of tools in a tool magazine through tool sockets so that they can be inserted and removed freely, and that automatic tool changing is performed by operating a tool transfer device or a tool changing arm. It is. In addition, in order to improve the mounting density of tools in the tool magazine, there is also a device in which a plurality of movable cartridges are housed in the magazine and a plurality of tool sockets are provided in the cartridge. No. 35,738, in which a desired tool socket in the cartridge is positioned in position by sliding the cartridge in an index position for a fixed tool change, and in this position the desired tool socket is removed from the tool socket. A tool transfer device is provided that extracts a tool, transfers it to a tool spindle in a spindle head of a machine tool, and exchanges the tool with a used tool mounted on the tool spindle. However, in a tool changer that transfers tools in this way, the direction of the main axis of the tool is generally changed during the process of attaching the tool from the state stored in the tool magazine to the tool main axis of the machine, or vice versa. In order to eliminate the inconvenience of complicating the structure of the tool transfer device, for example, a device was developed in which the tool socket itself was extracted from the tool magazine along with the tools and the device was turned over into a position suitable for tool exchange. -102550.

[Problems to be solved]

However, the tool socket overturning device disclosed in this latter known document also requires the luffing drive mechanism and the forward/backward drive mechanism while extracting the tool socket from the tool magazine and transferring it to the tool spindle of the machine tool and the position where the tool is exchanged. This requires two drive mechanisms, and therefore there is still a problem in that the structure lacks surface integrity.

Therefore, the object of the present invention is to provide an hour wheel configuration so that a tool socket in a tool magazine can be transferred all at once to a position where tools are exchanged between it and the tool spindle of a machine tool using a single drive device. It is an object of the present invention to provide a tool socket transfer device according to the present invention.

[Means of solution and action]

In view of the above-mentioned object of the invention, the present invention provides a tool socket transfer device that is installed on a machine tool together with a tool magazine in which a plurality of cartridges having a plurality of tool sockets are disposed, and a tool socket transfer device that is mounted on a base of the machine tool. a swing arm that is attached to the tool magazine and is provided so as to be able to reciprocate in a plane; a tool socket delivery position for receiving and receiving a tool socket of a cartridge indexed from the tool magazine; and a tool exchange position near the tool spindle of the machine tool. a cylinder device that slides the swing arm; a socket gripper that is provided at the tip of the swing arm and grips the tool socket with a fixed claw and a movable claw; and a socket gripper that grips the tool socket only at the tool socket delivery position. Provided is a tool socket transfer device comprising a gripper actuating means capable of opening a movable claw, and transfers a tool socket between a tool socket delivery position and a tool exchange position, and the above-mentioned cylinder device is simply replaced with a tool socket transfer device. The tool socket used as one driving source is transferred.

Hereinafter, the present invention will be explained in detail based on embodiments shown in the accompanying drawings.

〔Example〕

Fig. 1 is a plan view showing the tool socket transfer device according to the present invention installed on the base of a machine tool, and Fig. 2 is a plan view showing the configuration at the tool socket delivery position.
3 is an enlarged plan view including a partial cross section as seen from the ■-■ arrow line in FIG. 2 showing the operating state of the tool socket transfer device at the tool socket delivery position; FIG. 4 is a partial side view taken from the line of arrow IV-IV in FIG. 3. 5 and 6 are an external front view and a top view of a machine tool equipped with a tool changing device equipped with this tool socket transfer device.

First, the configuration of a machine tool with a tool changing device equipped with a tool socket transfer device according to the present invention will be explained in FIGS. 5 and 6.
Referring to the figure, the machine tool includes a table 3 that slides in the X-axis direction on a bed 1, a column 5 that slides in the X-axis direction, and a spindle head that slides on the front surface of this column 5 in the Y-axis direction. 7, and the feed of each axis is driven by an X-axis drive motor 9, a Y-axis drive motor 11, and an X-axis drive motor 13, respectively. A tool spindle 15 is rotatably supported on the spindle head 7, and a tool 17 is detachably held at the tip of the tool spindle 15. A desired shape is processed according to the relative movement in the z-axis direction.

In addition, the machine tool is rotatably supported by a base 21 installed at the rear side of the bed 1, and is equipped with a disk carving tool magazine 23 that stores a large number of tools. A plurality of cartridges 25 are housed in a radial arrangement with respect to the center of rotation of the tool magazine 23 so as to be slidable in the radial direction. A large number of tools are housed in the disk carving tool magazine 23 while being attached to tool sockets 27 that are detachably held in the respective cartridges 25.

Each cartridge 25 housed in the disk carving tool magazine 23 can be indexed to two index positions, a tool delivery index position 29 and a tool replacement index position 31, by the magazine indexing operation. At the indexing position 29 for tool delivery, the first cartridge guide device 3
3 and a tool socket transfer device 43 of the present invention, which will be described later, the receiver of the tool socket 27 is ready for transfer. In addition, at the latter index position 31 for tool replacement, the cartridge 25 is slidably transferred from the disk carving tool magazine 23 into the device 35 in the second cartridge X, allowing the operator to freely replace the necessary tools. I'm starting to get it. The method for controlling the indexing operation of the disc carving tool magazine 23 and the sliding movement of the cartridge 25 at the indexing position 29 for tool delivery and the indexing position 31 for tool replacement are already known, for example, the method described above. Special Public Service 1986-35
What is disclosed in No. 738 is applicable. Furthermore, when the cartridge 25 indexed to the tool delivery index position 29 is slid into the first cartridge guide device 33 for tool delivery, one cartridge 25
A desired tool socket 27 in the cartridge guide device 33 is positioned at a predetermined tool socket delivery position 37 of the first cartridge guide device 33, and the desired tool socket 27 is transferred from this tool socket delivery position 37 by the tool socket transfer device 43 according to the present invention. That is, the tool socket holding the tool to be used next is transferred to the tool exchange position 39 provided close to the spindle head 7, where it is exchanged with the used tool 17 mounted on the tool spindle 15. Tool exchange with tools is accomplished by a known tool exchange arm 41. After tool replacement, the tool socket 2 holding the used tool 17
7 is returned by the tool transfer device 43 to the tool socket transfer position 37 where it is re-stored within the cavity of the cartridge 25. The cartridge 25 that has re-accommodated the tool socket 27 is returned to the disc engraving tool magazine 23 via the tool delivery indexing position 29, and then the cartridge 25 that has accommodated the necessary tools is indexed.

Now, the basic configuration of the tool socket transfer device 43 according to the present invention includes a swing arm 47 that swings back and forth around a rotation center 45 provided on the base 21 as a fulcrum, and one arm that drives the swing arm 47 to swing back and forth. It consists of a fluid pressure cylinder device 49, a socket gripper 51 provided at the tip of the swing arm 47, and an operating means for this socket gripper 51 (not shown in FIGS. 5 and 6). -51 is a track or guide rail 5 provided on the top surface of the base 21 for transferring the tool socket.
3 as shown by the reciprocating arrows in FIG.

Next, referring to FIGS. 1 to 4 regarding the tool socket transfer device 43 according to the present invention, the swing arm 47 of the device 43 reciprocates around the rotation center 45 as described above. Although it is an arm member, this rotation center 45 is the first
The tool socket delivery position 37 provided on the cartridge guide device 33 and the tool exchange position 39 disposed close to the spindle head 7 are located at the center of the rotation radius, with the tool socket delivery position 37 provided in the cartridge guide device 33 and the tool exchange position 39 disposed close to the spindle head 7 as two points on a concentric circle, and the swing arm A tip 55a of a telescopic rod 55 of the fluid pressure cylinder device 49 is pivotally attached to approximately the midpoint of the hydraulic cylinder device 47. A socket gripper 51 provided at the tip of the swing arm 47 is connected to the swing arm 47 by a plurality of bolts and screws 69, as shown in enlarged views in FIGS. The fluid pressure cylinder device 49 has the above-mentioned telescopic rod 55 and a cylinder body 57. A piston integrated with the telescopic rod 55 is built in the cylinder body 57, and pressure oil, etc. is supplied via fluid pressure pipes 59a and 59b. The piston is operated by supplying and discharging the pressure fluid, and the telescoping rod 55 is operated to extend and contract. and,
When the telescoping rod 55 is extended, the swing arm 47 moves to the tool changing position 39 together with the socket gripper 51, as shown in FIG.
7, the tool socket receiver as shown in FIG. 3 is moved to the transfer position 37 together with the socket gripper 51.

In addition, the tool socket receiver is located at the transfer position 37 and the tool exchange position 3.
9 are provided with adjustable stoppers 63 and 65, respectively, to enable accurate positioning of the swing arm 47, and a proximity switch or limit switch is provided adjacent to either one of the double-adjustable stoppers 63 and 65. By providing a detector 67 such as
It is possible to know in which position of both positions 37 and 39 the image is located. Of course, the detectors 67 may be provided at both positions 37 and 39 if necessary. In the above-mentioned fluid pressure cylinder device 49, the cylinder main body 57 is provided so as to be pivotable on a fulcrum 61 in order to smooth the expansion and contraction action of the telescoping rod 55 when the swing arm 47 is moved.

Next, the socket gripper 51 fixed to the tip of the swing arm 47 with a threaded bolt 69 is attached to a base plate 71 and a fixed claw 73 fixed to the base plate 71 by screw connection or the like.
The horizontally elongated hole 77 engaged with the pin 75 implanted in the rear part of the fixed claw 73 and the spring receiver have a flange 79 and are movable in the lateral direction perpendicular to the axial direction of the swing arm 47. The horizontal rod 81 and the spring receiver of this horizontal rod 81 are compressed between the flange 79 and the side surface of the fixing claw 73, and urge the horizontal rod 81 toward the end opposite to the horizontally long hole 77. The spring 83 and the horizontally long hole 77 of the horizontal rod 81
A link 87 has one end pivotally connected to the end opposite to the end provided with the link 87 and is pivotally attached to the base plate 71 via a pivot 85, and a link 87 is pivotally connected to the other end of the link 87. A movable claw 89 is arranged opposite to the fixed claw 73.
and engaging ends 73a, 73 of the fixed claw 73.
b and the engaging end 89a of the movable claw 89 grip the tool socket 27. Now, the movable claw 89 of this socket gripper 51 is connected to the swing arm 4.
When the tool socket delivery position 37 is reached by the first shift of 7, the end 81a of the horizontal rod 81 comes into contact with the stopper bolt 91 attached to the first cartridge guide device 33 in the shape of a protrusion. Since the amount of protrusion of the stopper port 91 is adjusted in advance with the nut 93, the horizontal rod 81
compresses the spring 83 and moves laterally under the guidance of the pin 75 (third
In the figure, the arrow points to the right). As a result, since the link 87 pivots about the pivot 85, the movable pawl 89 pivotally attached to the link 87 opens in the direction of disengaging from the tool socket 27. When the socket gripper 51 leaves the tool socket delivery position 37, the contact between the stopper port 91 and the horizontal rod 81 is released, and as a result, the movable claw 8
One moves toward the fixed claw 73 to close. In other words, the tool socket 27 is gripped.

As clearly shown in FIG. 2, the first cartridge guide device 33 has an opening 32 formed at the tool socket transfer position 837. Therefore, when a tool is replaced, before the indexed cartridge 25 of the tool magazine 23 is slid into the first cartridge guide device 33, the swing arm 47 of the tool socket transfer device 43 is slid to remove the indexed cartridge 25 from the socket. If the gripper 51 passes through the opening 32 of the first cartridge guide device 33 and reaches the tool socket delivery position 37, the movable claw 89 of the socket gripper 51 remains open relative to the fixed claw 73. wait,
A guide rail 33a is provided in the first cartridge guide device 33.
, 33b to grasp the desired tool socket 27 housed in the cartridge 25 that slides upward!'! P
(iMf is performed. Then, the desired tool socket 2
7 is positioned at the tool socket delivery position 37, the socket gripper 51 is transferred through the opening 32 toward the tool exchange position 39 (FIG. 1) by one chamber movement of the swing arm 47. '' As the horizontal rod 81 of the socket gripper 51 is separated from the stopper bolt 91, the movable claw 89 moves to close and firmly grips the desired tool socket 27. FIG. 3 shows the above-described movable claw 89 of the socket 7 toggle lever 51 in two states: an open state and a closed state.

In addition, the tool socket 27 by the socket Grisover 51
is maintained continuously after it is separated from the stopper bolt 91, and as shown in FIG. It is held by the thorn sopar 51.

On the other hand, the tool exchange arm 4 already mentioned in the tool exchange position 39
1 (Fig. 5), and after the used tool 17 is returned to the tool socket 27, the tool socket 27 holding the used tool 17 is moved by one movement of the swing arm 47. Tool socket delivery position 3 again
7, but at this time the tool socket delivery position 3
Since the empty space of the cartridge 25 is waiting at 7, the socket gripper 51 passes through the opening 32 of the first cartridge guide device 33 and transfers the tool socket 27 holding the used tool into the cartridge 25 to the cartridge empty space. back to
At this time, the end 81a of the horizontal rod 81 is again connected to the stopper bolt 9.
1 to open the movable claw 89. In this way, one cycle of the tool socket transfer action of the tool socket transfer device 43 is completed.

As shown in FIGS. 2 and 3, the first cartridge guide device 33 is provided with a socket detector 95 facing the opening 32 at the tool socket delivery position 37. For example, since it is formed by a known proximity switch, it detects a dog 97 predetermined in the tool socket 27 housed in the cartridge 25 that slides up the first cartridge guide device 33, and A detection signal indicating the presence or absence of a tool socket in 25 is sent out. Therefore, this detection signal can be used to control the operation timing of the fluid pressure cylinder device 49 of the tool socket transfer device 43,
Alternatively, the operation timing for returning the car h IJ socket 25 to the tool magazine 23 after the completion of tool exchange can be controlled. Similar socket detectors 95 are also placed appropriately at the three tool exchange positions, and
By detecting the presence or absence of 7, the tool exchange operation by the tool exchange arm 41 (FIG. 5) can be controlled.

Now, the tool socket transfer device 43 has the basic configuration and operation as described above, but when transferring the tool socket by the reciprocating swing of the swing arm 47, the long arcuate reciprocating motion is so that the socket gripper 51 can stably grip the tool socket with each other (the socket gripper 51).
The gripper 51 includes rolling rollers 9 shown in FIGS. 3 and 4.
9 is rotatably attached to the bottom surface of the base plate 7I, and this rolling roller 99 runs on an arc-shaped fixed track 53 provided on the top surface of the base of the machine tool. This ensures stable transfer operation.

〔Effect of the invention〕

As described in detail above, the tool socket transfer device of the present invention cooperates with a cartridge storage type tool magazine to move the tool socket from the tool socket delivery position close to the tool magazine to the tool exchange position close to the spindle head of the machine tool in a single unit. Achieves both gripper operation, which uses the hydraulic cylinder as a drive source to grip and release the tool, and socket transfer, which transports the tool socket between two positions: the tool socket delivery position and the tool exchange position. In this way, since only a single drive source is used, the mechanism of the tool socket transfer device can be simplified compared to conventional ones.
As a mechanical device, it was possible to provide a device that was inexpensive and had fewer failures.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a tool socket transfer device in a tool changer according to the present invention, FIG. 2 is a partial front view as seen from the ll-11 arrow line in FIG. 1, and FIG. 3 is a tool socket transfer device in FIG. 1. FIG. 4 is a partially enlarged plan view including a partial cross section taken along the arrow line mm--m in FIG. 2, showing the device in the tool socket delivery position; FIG. 4 is a partial side view taken along the line IV-rV in FIG. 3; , FIG. 5 is a front view of a machine tool equipped with a tool changing device equipped with the same tool socket transfer device, and FIG. 6 is a top view seen from the arrow line (■) in FIG. 7... Spindle head, 15... Tool spindle, 21...
- Base, 23... Disc-shaped tool magazine, 25... Cartridge, 27... Tool socket, 29... Index position for tool delivery, 33... First cartridge guide device, 37... ...Tool socket delivery position, 3...Tool exchange position, 43...Tool socket transfer device, 45...Rotation center, 47...Swing arm, 49...Fluid pressure cylinder device, 51. ...Socket Glisova-153... Fixed orbit, 7
3...Fixed claw, 81...Horizontal rod, 83.
...Spring, 89...Movable claw, 91...Stopper bolt, 95...Rolling roller.

Claims (1)

[Claims] 1. In a tool socket transfer device installed on a machine tool together with a tool magazine in which a plurality of cartridges each having a plurality of tool sockets are arranged, The swing arm is installed between a tool socket delivery position where a tool socket of a cartridge indexed from the tool magazine is delivered and a tool exchange position close to the tool spindle of the machine tool. a cylinder device that swings the swing arm; a socket gripper that is provided at the tip of the swing arm and grips the tool socket with a fixed claw and a movable claw; and a socket gripper that opens the movable claw of the socket gripper only at the tool socket delivery position. What is claimed is: 1. A tool socket transfer device comprising a gripper actuating means, and transferring a tool socket between a tool socket delivery position and a tool exchange position. 2. The gripper actuating means includes a spring means that urges both the fixed and movable claws of the socket gripper toward the closed position, and a spring means that abuts the movable claw coupling body at the tool socket delivery position, and the spring means 2. The tool socket transfer device according to claim 1, further comprising a fixed protrusion that applies a resisting opening force. 3. The socket gripper has rolling rollers so that it rolls along a fixed track provided on the base of the machine tool according to the reciprocating swing of the swing arm. The tool socket transfer device described in Section.