JPS58149151A - Automatic tool exchanging cutter holder - Google Patents

Abstract

PURPOSE:To make it possible to unify the configuration of tools by using a tool holder mounting in common with a machining center mounting part. CONSTITUTION:A tool mounting part is made in the same structure as that of a tool holder mounting part on a machining center, and a spring member always acting on a lifting collet pawl in the lifting direction and a lever 29 for lifting or releasing the collet pawl 26 are provided. Further, a unclamp cylinder mechanism 30 which operates to force the lever 29 to realse the collet pawl 26 at a tool holder 21 exchanging position and a clamp cylinder mechanism 33 which acts to forcibly lift the collet pawl 26 at a position of using a tool are also provided. Accordingly, an automatic tool exchanging cutter holder capable of using a tool on a machine center in common can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a turret tool post which is an improved automatic tool changer Im in a lathe.

Conventionally, as an automatic tool change mechanism for a turret tool rest of a lathe, a quick change tool holder type is known and put into practical use. However, since a quick change tool holder is used, the tool magazine section must be manufactured to suit the mounting shape of the accommodating section, which results in a complicated structure and lacks versatility, resulting in high cost and cost due to small-scale production. There was a drawback. In recent years, due to high efficiency and high labor saving, machining centers have become widespread and the number of production units has increased rapidly.The cost of manufacturing tool magazines has gradually decreased, and we are now in an era where machining centers are installed very close to the Turret F lathe. Tools and engineering! When Gazin is used, various advantages arise due to its commonality.

Therefore, the present invention has been made with this point in mind, and an object of the present invention is to provide an automatic tool changing tool rest that can be used in common with the tools of a machining center. The tool has a spring member that constantly acts on the pulling collet pawl in the pulling direction, and a lever that pulls up or releases the collet pawl so that the lever releases the collet pawl at the tool holder exchange position. The present invention is characterized by the provision of an operative unclamp cylinder mechanism and a clamp cylinder llA411rt which acts to forcefully pull up the collet pawl at the tool use position.

Embodiments of the present invention will be described below based on the drawings.

A turret 6 is integrally fixed to a rotating shaft 2 which is slidably and rotatably supported in a horizontal direction on a tool rest main body 1 placed on a middle stand of a lathe and is prevented from rotating by a key. A piston body 4 fitted into a cylinder 5 provided in the tool rest main body 1 is provided in the middle of the rotating shaft 2, and an index disk 86 for rough positioning and a gear 7 are fixed concentrically to the end. ing. The same number of grooves 6& are cut on the outer periphery of the protrusion 1 disc 6 corresponding to each tool mounting position of the turret 3, and the piston lid 10 of the piston 9 fitted in the cylinder 8 is inserted into the groove 6a. is the positioning bin.

Further, a gear 11f meshing with the gear 7 is provided, which is fixed to the input shaft and corresponds to the number of tools, and in this example, a tool position detector 12 consisting of a rotary switch having eight contacts.

At a position where the turret 6 and the turret main body 1 face each other, there is a curvic coupling 1 having teeth that is an integral multiple of the number of tools installed.
3 is fixed concentrically with the rotating shaft 2. Also Taren)
An internal gear 14 with a long meshing width is fixed to the inside of the coupling 13 on the back side of 311, and a rotating shaft is supported on the turret main body 1 so as to be rotated by a motor 15 via gears 16 and 17. It meshes with the pinion 19 at the tip of the pinion 18. Therefore, when pressurized fluid is sent to the rear chamber of the cylinder 5, the piston 4 moves forward, and the turret 3 is pushed out together with the rotating shaft Z, the curvic coupling 16 is disengaged.
The internal gear 14 and the turret 6 are rotated through the pinion 19f, which is rotatable and in mesh with the rotation of the motor 15. The flat parts 3a, 3b...6h of the hexagonal part of the turret 3 are fitted with pull stands of the tool holder 21 for machining centers each having a tool 2°'22rt*. The tool holder 2 has a tapered hole 24 &
A socket 24 with one locating pin 25 is fitted. In the hole at the back of this socket 24, there are two symmetrical collet claws 2 that pull up the pull stand 22.
6 is housed therein, and a draw bar 27 for pulling up the collet pawl 26 is housed so as to be slidable in the axial direction. This) four-part 27 has a flange 27&
The collet claw 26 is always biased in the direction of pulling up by a compression spring 28 interposed between it and the socket 24, and furthermore, a rectangular window bored in the axial direction of the draw bar 27 at the end Near the back side of the turret 6, one end of a short arm of a scale-shaped lever 29 pivoted at a fulcrum 36 faces. The other end of the long arm of this lever 29 is the tool holder 2 of 6.
The piston 61 is fitted into the unclamp cylinder 30 provided in the tool rest main body 1 at the position directly above which is the replacement position of 1.
The screw F is in contact with the end of the hood 62. Therefore, when pressure fluid is sent to the cylinder 60, the lever 29 is rotated in the direction of the hour hand as shown in Figure 1, thereby opening the fret 26. Further, the other end of the long arm of the lever 29 is engaged with a key portion at the end of a piston rod 65 fitted with a piston fitted into a clamp cylinder 65 provided in the tool rest main body 1 right beside the tool use position.

Therefore, when pressurized fluid is sent to the front chamber of the cylinder 36, it is pulled by the key and turned clockwise in FIG. to provide rigidity against cutting force.

In the present invention configured in this manner, pressure fluid is sent to the front chamber of the cylinder 5, the turret 6 is pulled toward the tool post main body 1 side via the piston body 4 and the rotating shaft 2, and the curvic coupling 13 is engaged. ing. In this state, the lever 29 corresponding to the socket 24 located directly above faces the piston rod 32 of the unclamp cylinder 60, and when pressure fluid is sent to the rear chamber of the unclamp cylinder 30, the piston rod 62 moves to the lever 29. Push the end and turn 1i in the direction of the hour hand.
In order to release the collet, the collet pawl 26 is pushed outward against the force of the drawper 27 and the spring 28 to open the collet pawl 26.

After doing this, insert the key groove of the tool holder 21 into the key 25.
Shank 2'5f: Fit into the tapered hole 24m accordingly. When the supply of pressure fluid to the unclamp cylinder 60 is stopped and the cylinder is dropped into the drain, the pressing force on the lever 29 disappears.
The dowel bar 27 is pulled in by the force of the spring 28, and the collet claw 26 pulls up and clamps the stud 22f. When one tool holder is installed in this way, pressure fluid is sent to the front chamber of the cylinder 80 and the positioning bin 10 is
is moved backward, and pressurized fluid is sent to the rear chamber of the cylinder 5 to push out the turret 6 through the piston body 4 and rotating shaft 2 and disengage the curvic coupling 13. Next, in accordance with the signal of the tool position detection 1112, the motor 15t is rotated at the same time as the gears 16 and 17, and (b) the rotating shaft 18 is rotated to the pinion 1.
9 and rotate the turret 5 by a predetermined angle (in this example, 45 degrees). Pressure fluid is sent to the rear chamber of the cylinder 8, and the positioning pin 10ellj is inserted into the groove 6& of the drawing disk 6, and the turret 6 is roughly indexed. The big coupling 16 is engaged to determine the mounting position. Once the positioning is complete, attach the tool holder 21 to the next socket 24 as described above.
Charge and clamp. In this way, eight tools can be attached. After the tool installation is complete, the designated tool is indexed to the cutting position for cutting.

After that, pressurized fluid is sent to the front chamber of the clamp cylinder 63, and the key part of the piston rod 35 is used to turn the lever 29rr in the opposite direction, and the collet pawl 26 pulls the pull stud 22 via the dolly bar 27, so that the tool holder 21 is spring-loaded. In addition to the force, a force obtained by increasing the force of the piston by the lever ratio is added, and the socket 24 is strongly fitted into the socket 24, imparting strong rigidity, and can sufficiently withstand even large cutting forces. Replacement of the tool holder is carried out by unclamping the collet pawl 26 under the action of the pressure fluid of the cylinder 6o at the mounting position. Note that the tool holder with a storage shank can also be used in the same way by simply replacing the socket 24.

As detailed above, in the present invention, the tool holder mounting part is made the same as the mounting part of the machining center, so tools can be shared, and the attached tool magazine can be used for the machining center without having to make a special one. It has the feature that the tool price can be made economical.

[Brief explanation of drawings]

The si figure is a front view of the turret tool rest without the tool holder installed. Figure 2 is the front view of the turret tool post with the tool holder installed in the tool use position #! FIG. 1 is an explanatory diagram of a cross section taken along line A-A in FIG. 3. FIG. 4 is an explanatory diagram of a cross section taken along line B-B in FIG. 2. FIG. 4 is an explanatory diagram of a cross section taken along line C-C in FIG. 1... Turret main body 6... Turret part 21...
Tool holder 22...Pull stud 24...Socket 26...Collet claw 27...Drawer
29...Lever 60...Unclamp cylinder mechanism 66...Clamp cylinder mechanism Patent applicant Zensha Corporation Okuma Iron Works representative Shioto Patent attorney Yumi Kato

Claims (1)

[Claims] (1) In a turret tool rest in which a plurality of tools are arranged at equal intervals on the circumference and rotated and indexed, the plurality of tools are held in a tool holder with a taper or a straight shank used in a machining center, The tool mounting part of the turret part of the turret tool rest has a mounting hole part that fits with the taper or straight shank of the tool holder, and a collet pawl member that pulls the pull stud of the tool holder is located at the back of the hole part. A pulling member for the collet claw member is provided, and the pulling member is arranged in the direction of the pivot axis of the turret F section and a spring member that is always activated, and is pivoted at the center and has one end locked to the pulling member. The turret body includes an unclamp cylinder mechanism that acts in the direction of opening the collet pawl in the tool holder exchange position, and a clamp cylinder mechanism that acts in the direction of pull up the collet pawl in the tool use position. An automatic tool changing tool post characterized in that a tool for a machining center can be directly inserted as a tool for a lathe.