JPS61226201A - Automatic workpiece orderly feeding device in lathe - Google Patents

Abstract

PURPOSE:To speed up the feed of workpiece by feeding them one after another like handing them over by swinging clockwise or anticlockwise, advancing, and retracting a fork provided with chucks at the end of each of the arms in front of a lathe chuck. CONSTITUTION:A workpiece (a) is machined with a fork 3 positioned in the middle of a lathe. Then, a dead center 12 is separated from the workpiece (a) to reverse, stop and retract the fork 3 to the side of a supply path 10. And the workpiece (a) on the supply path 10 is taken by a first chuck 7 and the workpiece (a) on a lathe chuck 9 by a second chuck 8. In this state, the fork 3 is made to advance, reverse to the side of a delivery path 11, and retract moving the workpiece (a) in the first chuck 7 into the lathe chuck 9 and dropping the workpiece (a) in the second chuck 8 on the delivery path 11. In the next step, the fork 3 is made to advance, return to the middle of the lathe, and retract to machine the workpiece (a). The above motion is repeated improving the efficiency of machining by this device.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an automatic progressive feeding device for a workpiece, which feeds the workpiece into and out of the lathe chuck in a lathe that cuts the workpiece.

Prior Art Traditionally, robots have been used to automatically feed workpieces into and out of lathe chucks. However, highly accurate robots are very expensive, so their use is not necessarily a good idea. Also, even if the accuracy is quite high, the expected accuracy cannot be obtained because the arm wobbles during operation, and the speed of operation is limited by the length of the arm, so even higher efficiency cannot be achieved. Further, due to the relative structure with the lathe, it is difficult to attach it to the lathe, and the useful space of the lathe tends to be occupied by the robot.

This invention was invented in view of the drawbacks when using a robot as an automatic progressive feeder for workpiece parts on a lathe, as described above, and it is installed and installed in a spare part of the lathe that is not particularly used. The object of the present invention is to provide an automatic progressive feeder for workpieces, which is capable of stably and accurately moving workpieces to a lathe chuck and rapidly feeding the workpieces.

The structure of the invention, that is, the structure of the present invention for achieving the above object, is as follows:
The equipment base is fixed on the headstock of the lathe, and a two-pronged body consisting of a pair of arms is attached to the front end of the equipment base in front of the lathe chuck to control the movements of left and right rocking and forward and backward movement. A primary chuck for feeding the workpiece into the lathe chuck is attached to the tip of one arm of the bifurcated body, and a secondary chuck for feeding the workpiece from the lathe to the tip of the other arm. The structure is such that the primary and secondary chucks can sequentially feed the workpiece through the lathe chuck as if hand-delivered by the swinging of the two-pronged body, and the two-pronged chuck is used to pass the stop center of the lathe between both arms. The structure is such that the body can make intermediate stops.

The base 2 of the device P of the present invention is fixed to the main spindle 1 of the lathe F according to the embodiment, and the support shaft 4 of the two-pronged body 3 is supported on the base 2. The two-pronged body 3 has a pair of arms 5, 6, and is equipped with a primary chuck and a secondary chuck 8 at the tips of both arms 5 and 6, and swings left and right in front of the lathe chuck 9, moving forward and backward. A supply path 10 for the workpiece a is provided on one side of the left-right swing position of the bifurcated body 3, and a supply return path 11 is provided on the other side.

The base 2 is box-shaped, with front and rear IN standing walls 20, 21 protruding from the center of the interior, and a lid-shaped top @17 fixed to the top surface. The support shaft 4 is passed through the front and rear walls 18, 19 and the front and rear upright walls 20, 21 of the base 2, and the rotation of the support shaft 4 causes the bifurcated body 3 to swing.

The rotation of the support shaft 4 is based on a mechanism of a rack 22 and a pinion 23, and the rack 22 is supported by a pair of left and right vertical plates 24, 24 provided in the base 2, and fixed on the top plate 17. A connecting piece 27 with a rod 26 of the cylinder Z5 is erected at one end so as to be reciprocated by the cylinder 25.

Further, the pinion 23 is fixed to the support shaft 4 between the front and rear upright walls 20 and 21, and includes an upper and a lower pinion 28.
29 are provided, and by adjusting the protruding dimensions of the upper and lower stopper pins 28 and 29 with screws, the rotation range of the support shaft 4, that is, the swing range of the bifurcated body 3 can be changed. There is.

As shown in FIG. 4, the support shaft 4 of this rotation control section is a deformed support shaft 4' having protrusions 50 provided at regular intervals in the axial direction. Bearings 52 with balls 51 interposed therebetween are fixed to both sides of the strip 50. In this way, the pivot shaft 4' of the rotating portion has a special pivot shape and bearing structure that allows it to move back and forth and rotate left and right.

Further, the operation of the cylinder 25 is electrically controlled so that the trident 3 is stopped in the middle. Furthermore, in order to stabilize the state of this intermediate stop, a lock pin 34 is provided protruding from the front end of the base 2, and a hole 35 is provided at the top of the bifurcated body 3 to receive the lock pin 34. However, the receiver is adapted to fit into the hole 35.

Next, the movement of the support shaft 4 back and forth is also due to the power of another cylinder 36. A connecting piece 38 with the piston rod 37 of the cylinder 36 is fixed to the rear end of the supporting shaft 4, and a connecting piece 38 is attached to the base 2. No. 38 has an id bar 39 protruding from it.

Further, an L-shaped support plate 40 to which the cylinder 36 is attached is fixed to the upper plate 17 of the base 2. The movement of the cylinder 36 is electrically controlled so that the rod 37 is retracted at each of the three stop positions of the bifurcated body 3 at the left and right swinging ends and in the middle. Therefore, the bifurcated body 3 retreats at each of the three stop positions, and at the intermediate stop position, the lock pin 34 is fitted with the receiving hole 35, and the intermediate stop of the bifurcated body 3 remains immovable. The chucking mechanism a of the primary and secondary chucks 7.8 of the prong body 3 utilizes air pressure from a compressor, and both chucks 7.
8 has an air supply pipe 45 for tightening it and an air supply pipe 46 for loosening it.

Regarding the structure for sending air to the same air supply pipes 45 and 46, the inner and outer air passages 47 and 48 are provided in the support shaft 4 by forming the supports 11I4 hollow and passing the pipes therein. The air supply pipe 45 is connected to the inner ventilation passage 47, and the loosening air supply pipe 46 is connected to the outer ventilation passage 48. Furthermore, an inner and outer air passage 4 is provided at the base end of the support shaft 4.
Air supply pipes 50.51 to each pipe 50.51 are attached to each pipe 50.51, and compressed air from the compressor is selectively supplied to either pipe 50.51 by an air inlet conversion device 49.

Next, the operation of the automatic sequential feeder P described above is explained. To explain in relation to F, first, as shown in Fig. 5, the bifurcated body 3
Since the front of the lathe chuck 9 is open at the intermediate stop position, the workpiece a that is tightened by the chuck 9
The stop center 12 of the tailstock shaft of the lathe F moves forward, and in this fixed state, the workpiece a is cut.

When the cutting process of workpiece a is completed, it stops and the center I2 retreats to its original position, and then, as shown in FIG. As a result, the primary chuck 7 at the tip of one arm 5 grips the workpiece a on the supply path 10, and the secondary chuck 8 at the tip of the other arm 6 grips the workpiece a on the lathe chuck 9.

After the bifurcated body 3 moves forward in this state, it is then reversed to the supply return path 11 side as shown in FIG. Release workpieces a and a, respectively. The workpiece a of the secondary chuck 7 is then clamped onto the lathe chuck 9, and the workpiece a of the secondary chuck 8 is dropped into the supply return path 11.

Next, the bifurcated body 3 moves forward, returns to the intermediate position again as shown in FIG.
and both arms 5 and 6 of the fixed trifurcated body 3
The stop center 12 enters in between, and the workpiece a supported by the stop center 12 is cut.

Then, the above-described operations are repeated, and the sequentially fed workpieces a are sequentially machined.

Effects of the Invention As described above, the present invention significantly exhibits the following effects.

1) The sequential feeding of workpieces is based on the oscillating motion of the trifurcated body, and feeding the workpiece into the lathe chuck and feeding the workpiece out of the lathe chuck are performed in one operation. The speed is very fast, and the efficiency of lathe processing work can be greatly increased.

2) The arm that sequentially feeds the workpiece is a two-pronged body that swings in front of the lathe chuck, so there is no need to make it look like a robot arm, and there is a risk of it wobbling because it is pivoted on the base. Accurate positioning accuracy can be expected.

3) Generally, the space above the headstock of a lathe is not used (-), but since the device of the present invention is installed on the headstock, the space above the headstock can of course be effectively used, and the space above the headstock can be used effectively. Since it is a stable location, it is easy to install it there,
Also in this respect, the accuracy of feeding the workpiece can be improved.

4) It has an extremely simple structure in which a cylinder can be used for the swinging and forward/backward movement of the bifurcated body, and because the structure is simple, it can be provided at a lower cost than a robot or the like.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of the device of the present invention showing how it is mounted on a lathe, FIG. 2 is a sectional view of the device as seen from the side, and FIG. 3 is a side view of the device. 4 is a sectional view taken along line A-A in FIG. 3, and FIGS. 5 to 7 are partial perspective views of FIG.
The figure is an explanatory diagram showing the operating procedure of the bifurcated body. F... Rotary gI P... Device of the present invention 1... Headstock 2... Base 3... Bifurcated body 4...
・Spindle 5, 6...Arm 7...-Next chuck 8...Secondary chuck 9...
Lathe chuck 12...stop center patent applicant
Marumasu Machinery Co., Ltd.

Claims (1)

[Claims] 1) A device base is fixed on the headstock of the lathe, and a two-pronged body consisting of a pair of arms is placed at the front end of the device base in front of the lathe chuck to swing from side to side and back and forth. The two-pronged body is pivoted so that it can move forward and backward, and at the tip of one arm of the two-pronged body is a primary chuck for feeding workpieces to the lathe chuck, and at the tip of the other arm is a primary chuck for feeding workpieces from the lathe. The configuration is such that the primary and secondary chucks can sequentially feed the workpiece through the lathe chuck as if by hand by swinging the two-pronged body. 1. An automatic progressive feeding device for workpieces in a lathe, characterized in that the two-pronged body is configured to be able to make an intermediate stop in order to pass between the arms. 2) A cylinder device fixed to a base and in which a piston rod advances and retreats along a guide bar, and a cylinder device supported inside the base so as to be swingable parallel to the guide bar, and further connected to the piston via a connecting piece at the rear end. A moving device for a chuck device, comprising a support shaft to which a rod is connected, and a chuck device installed at the tip of the support shaft. 3) In a spindle equipped with a chuck device at the tip, the spindle is formed hollow and a pipe is passed through the spindle to provide an inner and outer passage within the spindle, and this inner and outer passage is used for feeding to tighten the chuck. An automatic chucking device comprising a pressure pipe and a pressure sending pipe for loosening the pressure pipe, and configured so that pressure can be selectively sent to any one of the pipes using a pressure sending port conversion device. 4) A rotation device is provided on the spindle equipped with a chuck device at the tip, and at least that part of the spindle has a shape and bearing structure that allows it to move back and forth and rotate left and right; the piston rod of the cylinder. A rack connected to the rack via a connecting piece, a pinion meshing with the rack and fixed to a bearing of the support shaft, and a stopper pin interlocking with the cylinder to control the rotation range of the pinion. An automatic chucking device characterized in that the rotation of the chuck device is controlled by a rotation device.