JPS6113938B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for attaching and detaching a shaft object such as a crankshaft or a camshaft to a machine tool such as a superfinishing device.

When attaching or detaching a shaft object such as a crankshaft or camshaft to a machine tool, the workpiece is usually supported in a predetermined position using a support member such as a workpiece support claw, and the workpiece is supported at the center of both ends by moving the tailstock forward or backward. Or removed. Since such a movement is required, the workpiece support member must be moved in the axial direction in order to separate or engage the workpiece from the center of the support spindle, and first a cylinder unit for this movement is required. do. Next, a drive means such as a lift cylinder unit is required for reciprocating the workpiece support member from the attachment/detachment position of the machine tool to the transfer machine.

The conventional workpiece loading and unloading apparatus described above requires a cylinder unit for moving and lifting the workpiece in the axial direction, and requires a large number of cylinder units, their accessory parts, equipment, and piping, resulting in a complicated structure and increased costs. Also, arranging two cylinder units and their auxiliary equipment within the limited space of a machine tool is not optimal in terms of design, workpiece loading/unloading, and transport operations.

The present inventor has devised the present invention in order to solve the above-mentioned inconveniences in the attachment/detachment device of machine tools.
The purpose of this is to perform the two operations described above, that is, to engage and disengage the work between the tail stocks by moving one tail stock forward and backward, and in cooperation with this, move the work support member forward and backward to attach and detach the work between the tail stocks. As a result, workpieces can be removed and transferred by simply providing a lift cylinder unit for transfer between the workpiece removal section and the transport mechanism, reducing the number of equipment, parts, simplifying the structure, and reducing costs. Furthermore, it is an object of the present invention to provide a machine tool attachment/detachment device that simplifies the structure of the machine tool including the attachment/detachment device and improves the degree of freedom in design.

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a cutaway side view of the main parts of the device according to the present invention;
FIG. 2 is a view taken in two directions as seen by the arrows in FIG.

In Figure 1, 1 is the base of the machine tool, base 1
A tailstock mount 2 and a drive unit housing 3 are erected apart from each other above the mount 2, and a drive spindle 4 that rotates and vibrates is attached to the housing 3.
A tail stock jig 5 is protruded from the end of the spindle 4, and a chuck 6 is attached to surround this, and the tail stock jig 5 is on the fixed side.

Tailstock mount 2 facing housing 3
A movable tail stock jig 7 is provided concentrically with the tail stock jig 5 and is rotatable and freely movable forward and backward in the axial direction. This tail stock jig 7
Both ends of the workpiece W, such as a camshaft, are concentrically supported between the opposing ends of the jig 5, and rotation is applied by the spindle 4, and vibration in the axial direction, that is, oscillation movement is applied. , the periphery of the cam part is superfinished and polished by a grindstone that is placed on the outer periphery of the camshaft and pressed against it.

The tail stock jig 7 is held by a shaft-like holder 9 that is slidably fitted into a cylinder shaft 8 that is fitted and supported in a guide hole 2a provided in the front-rear direction of the pedestal 2 so as to be movable in the axial direction. The jig 7 protrudes in the axial direction from the end of the holder 9 facing the housing 3, and the holder 9 is rotatable within the cylinder shaft 8, and the rear end of the jig 7 and the tail plug 8 of the cylinder shaft 8
A spring 10 is compressed between a and the holder 9 is attached to the workpiece W.
A stopper 9a is provided at the rear end of the holder 9.
Also, a stopper 8b is provided on the inner diameter part of the cylinder shaft 8,
When the workpiece W is supported by the jig 7, the stopper 9a
An axial gap A is provided between and 8b.

A large diameter cylinder portion 2b is provided at the rear of the guide hole 2a.
A piston portion 8 is provided at the intermediate rear portion of the cylinder shaft 8.
c into the cylinder part 2b, and the piston part 8c
Hydraulic pressure is selectively supplied and discharged before and after , and the cylinder shaft 8 is moved forward and backward in the axial direction within the range of stroke B. In the figure, when the cylindrical shaft 8 is at its forward limit, the jig 7 supports the work W together with the jig 5, the jig 7 elastically presses the work W in the direction of the jig 5 with the spring 10, and the jig 5 vibrates in the axial direction. resists the spring 10 of the holder 9 and is absorbed by axial sliding due to the elastic force.

A cylindrical lifter slide shaft 11 is installed between the pedestal 2 and the housing 3 below the work W in parallel to the work W. The slide shaft 11 has lifter claws 12, 1 which are workpiece supporting members spaced apart in the axial direction.
2 is fixed and raised, and a V-shaped groove 12a is provided at the upper end of the claw 12, as shown in FIG. 2, and the groove 12a holds and supports two parts of the workpiece W from below. In this embodiment, two workpieces W are arranged parallel to each other on the left and right to perform the above-mentioned processing, so the slide shafts 11 are arranged parallel to each other on the left and right as shown in FIG. Support shaft 1 attached parallel to
Upper end holding member 15,1 of arm 14 fixed to 3
The arm 1 is fitted and supported so as to be slidable in the axial direction.
Another arm 16 is fixed to the support shaft 13 that supports the lift cylinder unit 17.
It is pivotally connected to the rod 17a. The rod 17a is moved up and down by driving the lift cylinder unit 17,
As a result, the arm 14 swings together with the support shaft 13, and the slide shaft 11 and claw 12 held by the arm 14 move up and down in an arcuate trajectory, supporting the workpiece W at the upper limit and supporting the workpiece W at the lower limit. Dispense and receive unprocessed work. Furthermore, the other arm 11
4 extends a part of this, and connects the end of the extending portion 114a and the connecting arm 18 attached to the support shaft 13 with a link 19.
and drive the arm 114 synchronously,
The lifter slide shaft and pawl connected to this are operated in the same way. There is a space between the slide shaft 11 and the workpiece W in the left and right direction (in the front and back directions of the paper in FIG.
In the illustrated example, the conveyor 20 is a chain conveyor, and the chain guide 2
A conveyance piece 22 having V grooves 22a at a predetermined pitch on the links of a chain 21 that is guided by 1a and circulates.
The chains 21 are provided spaced apart from each other in the front and rear, that is, in the axial direction of the workpiece W, and support the workpiece W between the grooves 22a of the spaced pieces 22, 22.

A guide ring 23 is fixed to the tip of the cylindrical shaft 8 that holds the tail stock jig 7, and a ring groove 23a on the outer periphery of the guide ring 23 is connected to a lifter having a U-shaped engagement recess 24a in the middle or upper part. The inner ends of the left and right claws 24b, 24b of the plate 24 are engaged so as to be slidable in the vertical direction and restrained in the axial direction. A guide rod 25 is fixed to the lower end of the connecting plate 24 in the axial direction, and the guide rod 25 is connected to the slide shaft 1.
It is slidably fitted into the inner diameter portion 11a of No. 1. The lower end of the contact plate 26 is connected to the jig 7 side end of the slide shaft 11, and a loose fitting hole 26a is provided at the upper end, through which a cooperating rod protrudes in the axial direction from the intermediate portion of the connecting plate 24. 27 in a slidable manner, and
A cooperating block 27a is fixed at the 7th end, and a clearance C is secured between the block 27a and the contact plate 26 in a state where the workpiece is supported. A stopper 28 is fixed to the end of the slide shaft 11 on the jig 5 side.
In this case, the sliding amount of the shaft 11 is regulated.

Next, to describe its function and effect, FIG.
The arm 14 swings due to the downward movement of the slide shaft 1.
1 is raised, and the claw 12 supports the workpiece W. To remove the workpiece W from between the jigs 5 and 7 in this state, the cylinder shaft 8 is moved to the left by introducing hydraulic pressure to the right side in the figure of the piston 8c, and the tail stock jig 7 is moved by the left movement of the cylinder shaft 8. The jig 7 is moved backward and removed from the left end of the workpiece W in FIG. Stroke B of cylinder shaft 8
On the other hand, the stroke D of the jig 7 is smaller by subtracting the above-mentioned clearance A, and the stroke C is smaller than this stroke D. As the connecting plate 24 whose axial direction is restrained by the guide ring 23 retreats, the rod 27 also slides within the hole 26a of the contact plate 26 and retreats, and the linear axial direction of the connecting plate 24 is guaranteed by the hole 26a and the guide rod 25. Ru. With the retreat of stroke C, the cooperative block 27a collides with the contact plate 26,
As a result, as the stroke progresses further, the contact plate 26 and the lifter slide shaft 11 move toward the holding part 1 in the direction of the jig 7.
5, 15 and slides while being held by the slide shaft 11.
The sliding amount E is regulated by one of the holding parts 15,
The work W slides in the direction of the length axis of E and is separated from the jig 5.

In this way, the workpiece W is separated from the jigs 7 and 5 and is supported only by the claws 12, and the claws 12 are lowered by the reverse drive of the cylinder unit 17, and the pieces 2 of the conveyor 20 are
The workpiece W is transferred onto the holder 2. Receive a new workpiece on the conveyor 20 and move the claw 12 upward,
A new workpiece is set between the jigs 7 and 5, both ends of the workpiece are supported by the reverse operation as described above, and the claws are moved downward to perform processing.

Although the illustrated example has been described in detail above, any workpiece and any machine tool may be used, and the specific structure is not limited to the above.

As is clear from the above, according to the present invention, the lifter support member of the workpiece is slid in the axial direction in conjunction with the movement of the movable tail stock.
The cylinder unit of the workpiece loading/unloading device does not require two units for axial movement and lift movement as in the past.
One unit for lift operation is sufficient, reducing equipment, auxiliary equipment, piping, etc., simplifying the structure of the attachment/detachment device, simplifying equipment, and reducing costs. Since it is not necessary to attach equipment such as a dual-action cylinder unit or accessory equipment to the machine, there are many advantages such as making the machine tool more compact and increasing the degree of freedom in design.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a cutaway side view of the gist of the invention, and FIG.
It is an explanatory view of two directions of the figure arrow. In the drawing, W is a workpiece, 5 and 7 are tail stock jigs, 8 is an advancing/retracting mechanism, 11 is a slide member, and 2
4 is a lifter connecting member, and 17 is a lifting means.

Claims (1)

[Scope of Claims] 1. A tail stock jig 5 that rotates together with the chuck 6 is provided on one side, and a tail stock jig 7 that is resiliently sprung by a spring 10 inside a cylindrical shaft 8 that can move forward and backward by a cylinder portion 2b is provided on the other side. A two-pronged lifter connecting member 24 is provided facing downward at the tip of the cylindrical shaft 8, and a cooperating rod 27 is connected to the lifter connecting member 24 and a cooperating rod 27 is provided at its tip. A guide rod 25 is horizontally extended from the lower end of the lifter connecting member 24, and a guide rod 25 is extended horizontally from the lower end of the lifter connecting member 24.
A lifter slide member 11 extends horizontally between the two tail stock jigs 5 and 7 for guiding the tail stock jigs 5 and 7 around the lifter slide member 11, and a contact plate spanned between the lifter slide member 11 and the cooperating rod 27. 26 guides the forward and backward movement of the lifter connecting member 24 and the cooperative rod 27, and also fixes a pair of work lifter members 12 with an interval upward from the lifter slide member 11, and connects the work lifter members 12 to the lifter. The arm 14 is moved up and down by the guide of the member 24.
A workpiece attachment/detachment device for a machine tool, characterized in that a lift means 17 is provided on a base 1 with a .