JPH0639843Y2 - Loader equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention, after the primary processing of the workpiece carried into the processing area, reverses the workpiece and transfers the workpiece to the spindle where the secondary processing of the workpiece on the opposite side is performed. Regarding loader device.

More specifically, the present invention relates to a reversing device used in a machine tool having a double-headed spindle in which the axes of rotation of spindles for holding a workpiece are arranged in parallel with each other. Conventionally, a reversing device used in this type of machine tool includes a transfer means for transferring a work piece from a spindle on a primary processing side to a spindle on a secondary side,
The structure is composed of a swivel means for swiveling the transfer means by 180 degrees at each main spindle position, and requires a sequence relay circuit for controlling both means and a fluid or electric drive source, which constitutes a large-scale device. But sometimes
In general, the reversing device itself, if the distance between the main axes is decided,
Even if there is a change in the work piece, it is a constant movement without adding a special movement. In the case of adopting the structure as described above, it is not possible to expect the speedup of the operation because the interlock circuit is inserted as well as the confirmation of the sequence response. In order to eliminate these drawbacks in the present invention, it is an object of the present invention to provide a simple structure in pursuit of economical efficiency, a higher speed, and an improvement in cycle time on the processing machine side.

Hereinafter, the present invention will be described with reference to the drawings.

Reference numeral 1 is a spindle of a machine tool, and a spindle 1A for primary machining and a spindle 1B for secondary machining in which the axes of rotation of the spindles are arranged in parallel and separated from each other.
And is rotatably supported on the headstock 2. Reference numeral 3 denotes a workpiece reversing device (hereinafter referred to as a main body) of the present invention, which is installed on a spindle headstock 2 of the spindles 1A and 1B, and a first drive source on a guide stand 4 mounted on the spindle headstock 2. It can be moved back and forth in the direction of the rotation axis of the main shaft via (not shown). A feed slider 5 is slidably supported on a main body 3 in a direction orthogonal to the rotation axis of the main shaft through a guide 6 so as to be relatively slidable. 7
Is a swivel shaft that is capable of semi-rotating swivel around a direction orthogonal to the main shaft rotation axis, and is supported by the feed slider 5.
Reference numeral 8 denotes a transfer arm that extends vertically to the main shafts 1A and 1B located below the pivot shaft 7 so as to be pivotable around the pivot shaft 7 and is fixed to the pivot shaft 7, and 9 is a grip attached to the transfer arm 8. Hold the workpiece concentrically on the spindle rotation axis with
1A, 1B hand over the processed product. Reference numeral 10 denotes a movable shaft member that is slidably supported by the main body 3 in a direction that is horizontally orthogonal to the main shaft rotation axis. The movable shaft member 10 has both ends coaxially with the main body 3 and the shaft member 10. A pair of compression springs 12a, 12b having equal spring forces are installed in a pair of spring housing cylinders 11a, 11b extending in the direction. A rack 10a is provided in the axial direction of the movable shaft member 10, and the rack 10a is provided.
A pinion 13 that meshes with is fixed on the swivel shaft 7.
Reference numeral 14 is a first stopper 14A and a second stopper 14A, which are distributed so as to face the loading side and the unloading side of the workpiece, which regulate the relative position of the turning angle so that the turning shaft 7 can turn in the turning area of 180 degrees. A pair of stoppers 14B are fixed to the feed slider 5. Reference numeral 15 is a relative position of the swivel angle of 180 degrees of the swivel shaft 7, and is fixed to the swivel shaft 7 by a locking piece that can come into contact with the stopper 14.

A fluid cylinder 16 is a second drive source for relatively moving the feed slide 5 in the axial direction of the movable shaft member 10. One end of the piston lot 16a of the fluid cylinder 16 is connected to the feed slider 5. 17 is a processed product.

Next, the operation of the present invention will be described.

To explain the state of maintaining the posture of the transfer arm 8 located at the carry-in position, the fluid cylinder 16 is at the retracted original position, and the movable member is
10 is retracted in the direction of the loading side against the compression spring 12a.
At this time, the locking piece 15 on the swivel shaft 7 is in contact with the first stopper 14A that is distributed to the workpiece loading side, and the swivel motion of the swivel shaft 7 is restricted. When the workpiece is gripped by the gripping tool 9 via the separating means (not shown) at the carry-in position,
The fluid cylinder 16 moves forward and the feed slider 5 moves away from the loading side. At this time, the movable shaft member 10 still has the compression spring 12a,
Since the transfer arm 8 is in the state of being restrained by the first stopper 14A, the transfer arm 8 maintains the above posture. When this state is continued and the gripping tool 9 on the transfer arm 8 reaches a position concentric with the rotation axis of the spindle 1A on the primary side, the main body 3 moves forward in the rotation axis direction of the spindle to approach the spindle 1A, and the workpiece is processed. To the spindle. After that, the main body 3 retracts in the direction of the axis of rotation of the main spindle, and then the work piece is processed by the main spindle 1A on the primary side. When the processing is finished, the main body 3 advances again in the above-mentioned direction to grip the workpiece, and thereafter,
fall back. At this retracted position, the fluid cylinder 16 operates and further advances to transfer the feed slider 5 toward the main shaft 1B on the secondary side. During this time, the movable shaft member 10 is gradually released from the restraint of the compression spring 12a on the primary side, and the spring pressures of the compression springs 12a and 12b biased to the position opposite to the end of the movable shaft member 10 become equal. When the movable shaft member 10 is succeeded and further advanced, the movable shaft member 10 is biased and pressed by the compression spring 12b.
The transfer arm 8 is inverted by turning 180 degrees from the posture state of the gripping tool 9 located on the 1A side. When the swivel shaft 7 swivels, the locking piece 15 on the swivel shaft 7 is distributed to the workpiece discharge side.
When it abuts against the stopper 14B, the pivotal movement of the pivot shaft 7 is restricted, and the forward movement of the feed slider 5 pushes the movable shaft member 10 against the compression spring 12b in the same direction as the feed of the feed slider 5 to operate. By this operation, when the axial center of the workpiece gripped by the gripping tool 9 on the transfer arm 8 reaches the rotation axis of the secondary spindle 1B, the feed slider 5 stops. After this, the main body 3
Moves backward along the axis of rotation of the main spindle 1B on the secondary side, the workpiece is handed over to the main spindle 1B on the secondary side, and the processing of the back surface is started. When the processing is completed, the main body 3 advances again along the rotation axis of the main shaft 1B, whereby the gripping tool 9 moves away from the main shaft 1B. As a result, the feed slider 5 moves away from the rotation axis of the secondary spindle 1B and moves toward the unloading position located on the secondary spindle 1B side. In accordance with this operation, the movable shaft member 10 further receives the pressure of the compression spring 12b and advances.

As described above, in the present invention, the operation of the feed sliders for the primary and secondary spindles causes the transfer arm to pivot during the feeding through the pair of stoppers of the compression spring to invert the workpiece, thereby machining the spindles mutually. Delivery of goods is possible. Since a series of operations are mechanical sequence operations, it is possible to expect high speed and accurate workpiece transfer, and it is possible to provide an inexpensive device.

[Brief description of drawings]

FIG. 1 is a front view in which a main part of the device of the present invention is partially sectioned,
The drawing is a cross-sectional view taken along the line AA of the first drawing, and FIG. 3 is the relationship between a pair of stoppers and locking pieces that regulate the turning range of the turning shaft to 180 degrees. 5 ... Feed slider, 7 ... Swivel axis, 8 ... Transfer arm, 10 ... Movable shaft member, 12a, 12b ... Compression spring, 14A, 1
4B ... Stopper, 15 ... Locking piece

Claims (1)

[Scope of utility model registration request] 1. A spindle 1 in which the axes of rotation of the spindle are parallel to each other.
A feed slider 5 that relatively operates in sections A and 1B, and a gripping tool 9 that is mounted on a swing shaft 7 supported by the feed slider 5 and that grips a workpiece are formed at an angle of 180 degrees around the swing axis. A transfer arm 8 for relatively rotating and transferring to the main shafts 1A and 1B, and a rack 10a that meshes with a pinion 13 fixed on the rotary shaft 7 are engraved on the shaft, and the main shafts 1A and 1B sections are shafted. A pair of compression springs 12a, 12b biased with equal force on both ends
A movable member 10 which is constrained by the relative movement and is fixed to the swivel shaft 7 and which regulates the relative position of the swivel angle so that the swivel shaft 7 can swivel in a swivel region of a 180 degree angle. A loader device including a locking piece 15 that is engageable with the stoppers 14A and 14B and a drive source that relatively moves the feed slider 5 in the axial direction of the movable shaft member 10.