JPS6052209A - Diaphragm chuck - Google Patents

Abstract

PURPOSE:To make a variety of works different in each diameter conformable automatically, by making a jaw part so as to be interchanged as indexible in turning. CONSTITUTION:Each of rotary index type jaw parts 23 is installed in three spots on the circumference of a diaphragm 17, while each jaw plate 21 having various tip end parts suitable for a work is attached to each jaw part. These jaw plates 21 are interlocked, making them index in turning, and the jaw tip part being properly commensusate to the work is automatically indexed to a chucking position whereby these plates 21 are made so as to be conformable to a wide variety of works. With this constitution, various works different in each diameter can be indexed and chucked in an automated manner.

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a diaphragm chuck for gripping workpieces, and in particular, the chuck is rotatable and indexable so that it can be replaced automatically so that it can automatically handle various workpieces with different diameters. Regarding rotary type diaphragm chuck.

Conventional Art When various workpieces with different diameters are supplied to the chuck section of a machine tool, an operator has conventionally replaced the chuck jaws with jaws suitable for the workpieces. As a result, it takes time to remove and install the claws, the tightening force of the bolts for mounting the claws is uneven, resulting in poor accuracy, and furthermore, there are disadvantages such as the need to remove dust attached to the mounting surface when replacing the claws. It had

OBJECTS The present invention has been made in order to eliminate the above-mentioned drawbacks, and it is an object of the present invention to provide a diaphragm chuck that can handle a plurality of types of workpieces by allowing the selection of claws or claws and locating pins.

Solution Means The first invention provides rotary index type claws at three locations on the circumference of the diaphragm, attaches a jaw plate having various tips suitable for the workpiece to each claw, and connects these three jaws. By rotating and indexing the plates in conjunction with each other, this chunk automatically indexes the tip of the claw to the gripping position according to the workpiece as appropriate, making it possible to handle a wide variety of workpieces. The second invention is a chuck in which, in addition to the first invention, a disc in which a plurality of locating pins are embedded is indexed in conjunction with each jaw.

Embodiments Below, embodiments of the present invention will be explained based on the drawings〇Base 1
A pin 2 is implanted on the upper surface of the machine, and a headstock 3 is mounted so as to be pivotable about the pin 2 and fixed in position. A main spindle 5 is supported on the main spindle 3 via a housing 4, and a chuck portion 6 is attached to the front end surface of the main spindle 5. The chuck part 6 is a cylinder part 7, a part 8 + a rotary ridge.
! It is composed of a part 110-1, a relocation part 10, and a pin part 10.

The cylinder portion 7 consists of a backing plate 11 directly fixed to the front end surface of the main shaft 5, a cylinder body 12, and a piston 13. The piston 13 has an internal gear 14 carved therein. Further, the piston rod 15 of the piston 16 has a long-leap shape and extends to the rear through the main shaft 50 through hole. The diaphragm portion 8 is connected to the cylinder body 12.
The diaphragm body 17 is held between the front end surfaces of the cylinder body 12 by the presser plate 16, and the cylinder body 12 is held parallel to the axis of the main shaft 5.
The pressure pin 18 has a length extending from the front end surface of the piston 16 to the inner circumferential rear end surface of the tire flam body 17.

The p-tarijo portion 9 includes a housing 19 fixed at three equiangular positions on the circumference of the diaphragm body 17, a rotating shaft 2o supported by the housing 19, and a jaw attached to the front end surface of the rotating shaft 2o. It consists of a plate 21 and a gear 22 attached to the rear of the rotating shaft 20 and meshing with the internal gear 14. The jaw plate 21 has arcuate claws 23 at four equal angular positions on the outer periphery, each having a different dimension 'Ft from the center of the rotating shaft 20. In this example, three jaw plates 21 have the same shape, and the winter melons 23 are provided in the same phase relationship. The rotary sighting pin portion 10 is located between the rotor 923 and the portion 9 at three equal positions on the same circumference on the cylinder body 12.
a housing 24 fixed to the housing 24; a rotating shaft 25 supported on the housing 24; a disc 26 attached to the front end surface of the rotating shaft 25; It consists of gears 27. Locate pins 28 are placed on the front end surface of the disc 26 at four equiangular positions at different distances from the center of the rotating shaft 25.
has been planted. Each locate pin 28 of each disc 26
are located at the same position, have the same phase relationship, and are provided in a relationship corresponding to the claws 23 of the shimmy plate 21, respectively. A boo 929 is fixed to the rear end of the main shaft 5 to which rotation from a drive source (not shown) is transmitted. Further, an indexing lead body 31 having a lead groove 60 for rotationally indexing the jaw plate 21 and the disc 26 is keyed to the rear part of the piston rod 15.

A sliding body 32 is loosely fitted to the outer periphery of the index lead body 31 so as to be movable in the direction of the spindle axis while covering the outer periphery. There is. Even if the sliding body 62 moves, this attachment will not come off.

Further, a connecting pin 34 having one end inserted into the lead groove 60 is implanted in the sliding body 32.

A cylinder device 36 for moving the sliding body 32 is attached to a bracket 65 that projects rearward from the headstock 3, and a shifter 37 fixed to the tip of the cylinder device 36 engages with the sliding body 32. It matches. Furthermore, the outer periphery of the indexing lead body 31 includes a jaw plate 21 and a disc 2.
Ring-shaped dog 6 for checking the rotation index position of 6
Four No. 8s are installed. A confirmation bottle 40 is attached to the sliding body 62 and is always pressed into contact with the ring-shaped dog by a spring 69 and moved in and out in the radial direction. Furthermore, a proximity switch 41 is attached to the bracket 35 to detect the radial movement of the confirmation bin. An ejector rod 42 is inserted into the center hole of the sleeve-shaped piston rod 15, and a retaining portion 43 is provided at the rear end, and the bracket 65
A shifter 45 of R1 is engaged with the tip of a drive cylinder device 44 attached to the drive cylinder. Also, ejector rod 4
A workpiece ejector 46 is attached to the front end of 2, which can be replaced depending on the workpiece to be gripped.

This work ejector 46 is provided with a nozzle hole for cooling water, and the cooling water is supplied through the center hole 47 of the ejector rod 42.

Next, the effect will be explained. When the workpiece is gripped by the jaw plate 21 and processed, the center hole 4 of the ejector rod 42
Cooling water supplied through 7 is injected from the nozzle to the processing area. The machining is completely stopped, pressure fluid is sent to the rear chamber of the cylinder portion 7, and the piston 13 is moved forward.
Then, the pressing bottle 18 moves forward, and the diaphragm body 17 is pushed forward at the center, causing the jaw plates 21 at six locations to move forward.
opens his mouth. At the same time, the drive cylinder device 44 operates, and the ejector rod 42 and the workpiece ejector/nozzle 4 are activated.
6 moves forward and discharges the workpiece forward. Next, when a workpiece of the same diameter is to be gripped, the workpiece ejector 46 is retracted, and when a new workpiece is fed and pressed into the cage bin 28, the pressure fluid sent to the rear chamber of the cylinder portion 7 is discharged. The new workpiece is gripped by the jaw plate 21 due to the elasticity of the diaphragm body 17. When gripping workpieces with different diameters, the cylinder device 36 is operated to move the sliding body 32 with the workpiece ejector 46 and diaphragm body 17 retracted. By the movement of the sliding body 32, the indexing lead body 31 is rotated at a constant angle in accordance with the lead groove 30 at the connecting pin 34. Piston rod 15. Piston 16 is pivoted.

Then, the internal gear 14 of the piston 16 rotates and the gear 22.
27 rotate together, and the jaw plate 21 and disk 26 are rotated and indexed in conjunction with each other.

This indexing position is determined by the proximity switch 41 detecting the radial movement of the confirmation bottle 40 which is constantly in contact with the ring-shaped dog 38 as the indexing lead body 31 rotates. . After the required claws 23 and locating pins 28 have been indexed in this manner, the diaphragm body 17 is operated as described above, and a new workpiece having a different diameter is gripped. After gripping the workpiece, the pulley 29 is rotated and the main shaft 5 is rotated, and at the same time, the sliding body 62 is rotated by the transmission hinge 33.

Since the position of the sliding body 32 in the axis direction of the main shaft is regulated by the cylinder device 36, the rotation is transmitted to the indexing lead body 61 by the connecting pin 64, and the piston pd 15. This will be communicated to BisFun13. Since the rotation of the main shaft 5 rotates the backing plate 11° and the cylinder body 12, the entire chuck portion 6 rotates in the same manner as the main shaft.
In this way, the workpiece is rotated and processed. In this example, the jaw plate has four types of claws, but it goes without saying that this number can be increased or decreased as necessary.

Effects As detailed above, the present invention enables each claw portion attached to the diaphragm to be rotated and indexed, and the jaw plate of each claw portion is formed with a claw shape that can grip workpieces of different diameters. Furthermore, since the locating pin that regulates the position of the workpiece in the @ line direction can be indexed in conjunction with the claw, it is possible to automatically index and grip various workpieces with different diameters. Moreover, it is not only possible to handle workpieces with different diameters in a short time, but also to grip various workpieces with stable accuracy.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention; FIG. 2 is a view taken along line I-1 in FIG. 17...Diaphragm body 21...φ jaw plate 23...nails 26... Disk 28...locate bin

Claims (2)

[Claims] (1) The same jaw plate is attached to each claw attachment part of the diaphragm so that it can be rotated and indexed, and workpieces with different diameters can be gripped at multiple locations on the outer periphery of the jaw plate at different distances from the center of rotation. A diaphragm chuck characterized by being provided with a claw portion and a means for automatically indexing the claw portion with respect to various workpieces. (2) The same jaw plate is attached to each claw attachment part of the diaphragm so that it can be rotated and indexed, and the outer circumference of the jaw plate is placed at multiple locations at different distances from the center of rotation so that workpieces with different diameters can be gripped. A plurality of discs are provided with a claw part and a plurality of locating pins for regulating the position of the workpiece in the axial direction are provided so that they can be rotated and indexed in conjunction with the respective jaw plates, and can be used for various workpieces. A diaphragm chuck characterized by having a means for automatically indexing the claw portion and the locating pin.