JPH0512100B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a centering machine for grinding the outer diameter of a workpiece such as an optical component, and particularly to a centering machine for grinding the outer circumference of a rotating workpiece that is clamped between a bell, a chidle, and a tip. This invention relates to a workpiece feeding device that attaches and detaches a workpiece to a machine.

The above-mentioned centering machine itself is well known, and first and second
An overview of the structure of the centering machine will be explained with reference to figures.

A bell or gutter 7 is screwed onto the bell shaft for inserting the workpiece 22 into one end of the centering machine's bell shaft 3 and bringing out the "optical center" of the workpiece 22. A bell gear 6 for rotating the bell and gutter 7 is similarly attached to the shaft, and the bell shaft 3 is movable back and forth by the rack and pinion movement caused by the rotation of the arm 21 relative to the right guide 2, and clamps the workpiece 22. , plays the role of optical centering and prevents movement of the workpiece 22 during grinding.

The "optical center" of the work 22 is sandwiched between one end of the work shaft 11 by a bell or a groove.
A tip and grate 8 is screwed onto the workpiece shaft for releasing the bell and grate 8, and a work gear 12 is attached to the other end to rotate the tip and gill 8 in synchronization with the bell and gill 7. The rotational force transmitted by the bell motor 4 to the gear 14 via the transmission shaft 13 is transmitted.

As a result, the tip of the work shaft 11 supported by the left guide 10 , together with the bell shaft 7 of the bell shaft 3 , clamps the work 22 and brings out the optical center of the work 22 . is trying not to move.

The grindstone 15 is fixed to one end of the shaft of a spindle 20 which is rotated by the rotation of the grindstone motor 17 via a pulley 18 and a belt 19, and rotates.The grindstone 15 has the role of grinding the outer diameter of the workpiece 22 by moving the stage 16 forward. accomplish

The stage 16 is movable back and forth and left and right with respect to the base 1, and is moved by the movement of a cam, etc., and the maximum and minimum values in the front and back, left and right directions are limited by a stopper, etc.
Grinding wheel 15 for grinding the workpiece 22 thereby
The outer diameter and chamfer of the workpiece 22 are determined.

The opposing end surfaces of the bell and groove 7 and the tip and groove 8 are ground into sharp edges, and when the workpiece 22 is clamped, its role is to bring out the optical center of the workpiece 22, and to firmly fix the workpiece 22 so that it does not move during grinding. fulfill one's role.

FIG. 2 is a detailed view of the kettle portion when the workpiece 22 is clamped.

During operation, the workpiece 22 is brought in front of the tip chittle 8 and the arm 21 is rotated, and the bell shaft 3 to which the bell and chittle 7 is attached moves forward, placing the workpiece 22 between the tip chittle 8 and the bell chittle 7. Fix it and take out the optical center of work 22. At this time, normally, the forward movement of the bell shaft 3 and the clamping are detected by a switch based on the rotational position of the arm 21, and processing is automatically started.

When the start is applied, the grindstone 15 moves forward, and when chamfering the workpiece 22, it also moves left and right to chamfer and grind the outer diameter of the workpiece 22. Thereafter, the grindstone 15 returns to the rear and waits at the origin.
This becomes one cycle and is repeated.

In the above-mentioned centering machine, workpieces such as lenses are loaded and unloaded manually. The disadvantages for this are as follows.

(1) Even if a machine with a large number of heads is manufactured, loading and unloading the workpieces takes time and effort, making it impractical.

(2) Hitting the workpiece too strongly against the tip or chidle may damage the workpiece or the tip or chidle.

(3) When loading a workpiece, it is difficult to manually mount the workpiece with the correct axis line, and it is not possible to improve centering accuracy.

The object of the present invention is to provide a workpiece feed for an automatically operated centering machine which is capable of taking a workpiece fed as an approximately vertical axis, mounting the workpiece on a horizontal axis in the centering machine, and returning the finished workpiece in a reverse procedure. We are in the process of providing equipment.

Embodiments and drawings illustrating the present invention will be described. Similar parts or components are designated by the same reference numerals as in FIGS. 1 and 2 for clarity of explanation.

FIG. 3 shows a workpiece feeding device for a centering machine according to the invention. The three blocks according to the present invention, namely the turning section 23 and the pick-up section 2, are added to the conventional processing machine.
4. The clamp part 45 is attached to the main body base 1.

The turning section 23 is fixed to the upper part of the centering machine left guide 10, receives the workpiece 22 taken out by the pick-up section 24, and transfers the workpiece to the first or second picket 8.
and the bell and gutter 7 in front of it, and also serves to take out the workpiece 22 after processing from between the clamped end and the bell and gutter 7, and return it to the pick-up section 24.

The pick-up section 24 uses a suction pad to pick up the work 22 that has been conveyed to the front part of the main body, changes the direction of the work 22 by 90 degrees, and holds the work 22 until the turning section 23 arrives. FIG. 4 is a view of the swing section 23 and the pick-up section 24 seen from the bell shaft 3 side.
Figure 5 shows the swing section 23 and pick-up section 2 from the front.
This is a view of 4.

The chuck 30 is fixed to one end of the rotating arm 29 of the rotating section 23, and a pair of fingers 31 for chucking the workpiece 22 are attached to the claw section that opens and closes using pneumatic pressure. Together with the finger 31, it plays the role of checking the workpiece 22.

The pick-up cylinder 33 is fixed to the stand 32 of the pick-up section 24 attached to the L plate 46 attached to the main body, and serves as a power source for taking out the work 22 from the take-out point and storing it. fulfill. The stopper 34 is fixed to the stand 32.

When the pick-up cylinder 33 is extended, the lower arm 40 and upper arm 44 are in a straight line due to the force of the spring 36 (the state shown by the two-dot chain line in FIG. 5).
When the pick-up cylinder 33 is retracted and begins to rise upward, the contact member 43 attached to the rotary arm 42 attached to the lower arm 40 moves to the stopper 34.
corresponds to When the pick-up cylinder 33 is retracted any further, the lower arm 40 overcomes the spring force of the spring 36 against the upper arm 44 and begins to rotate around the support pin 37.

In other words, the stopper 34 moves the contact member 43 attached to the lower arm 40 to the pick-up cylinder 33.
By applying it when the axis of the pick-up cylinder 33 is raised, it serves to raise the lower arm 40 by the lifting action of the pick-up cylinder 33, and then to rotate it.

A part 41 for adsorbing the workpiece 22 is attached to one side of the lower arm 40, and a hole is made there for supplying negative pressure, and one end of the hole is connected to a pipe 38 leading to a negative pressure generator. ing. This serves to attract the workpiece 22.

A rotary arm 42 is attached to the other side, and the upper arm 4
4 through one support pin 37, and is rotatable relative to the upper arm 44. Also, a pin 39 is attached to receive one point of action of the spring 36, so that when the workpiece 22 is picked up by vertical movement of the axis of the pick-up cylinder 33, the spring force of the spring 36 causes it to be in a straight line with the upper arm. You can become like that.

The part is attached to the lower arm 40, and the workpiece 2
A soft material (rubber, etc.) that does not scratch the workpiece 22 as it becomes the contact surface when adsorbing the workpiece 22.
It is becoming.

A contact member 43 that abuts against the stopper 34 is attached to one side of the rotating arm 42 and is fixed to the lower arm 40.

The workpiece 22 is delivered to the rotating section 23, and the workpiece 2
2 serves to receive the workpiece 22 unloaded by the rotating section 23 after processing with the centering machine and return the workpiece 22 to its original position.

The clamp section 45 holds the unprocessed workpiece 2 loaded from the pick-up section 24 and the turning section 23.
2 to move the bell shaft 3, bell Yatoi 7, tip Yatoi 8
Insert the workpiece 22 between them and firmly fix the workpiece 22 so that it does not move during grinding. It also serves to move the bell shaft 3 and unclamp it when the rotating section 23 comes to pick up the workpiece 22 after machining.

The double-acting cylinder 28 is fixed on an L plate 46 attached to the main body, and the axis of the cylinder can rotate forward and backward.
A swing arm 29 is attached and serves to swing and move the swing arm 29 back and forth.

The swing arm 29 has one end connected to the double acting cylinder 28.
A chuck 30 for chucking the workpiece 22 is attached to the other end of the shaft.

Upper arm 44 has one side attached to pick-up cylinder 33
The lower arm 40, which has a part 41 for sucking up the workpiece 22, is connected by a support pin 37 and is rotatable. Also, a pin 35 is attached to receive one point of action of the spring, similar to the pin 39 on the lower arm. In FIG. 3, a pinion 25 for moving the bell shaft 3 back and forth is provided on the side wall of the right guide 2, and a rack 26 and a clamp cylinder 27 for driving the pinion 25 are attached to the main body base 1.

The operation will be explained.

When the workpiece 22 is set in a predetermined position on a pallet, magazine, indexing table, etc., the shaft of the pick-up cylinder 33 comes down. Then, lower arm 4
0 and the upper arm 44 are straightened by the spring force of the spring 36, and the part 41 is in a state facing the end surface of the horizontally placed workpiece 22, and the pick-up cylinder 33 is pushed to the extent that the part 41 contacts the end surface.
The axis of will go down. At that time, the negative pressure introduced from the negative pressure generator is guided through the tube 38, through the hollow part of the lower arm 40, and into the pad 41. As a result, work 22
is attracted to part 41. When the workpiece 22 is attracted to the part 41, the shaft of the pick-up cylinder 33 rises, and when the lower arm 40 becomes perpendicular to the upper arm 44, the shaft of the pick-up cylinder 33 stops. Then, pick up section 2
The double-acting cylinder 28 on the fourth side moves backward, and the chuck 30 attached to the pivot arm 29 closes. Then, the workpiece 22 is firmly fixed by the finger 31 attached to the chuck 30. Then, the negative pressure is turned off and the workpiece 22 is transferred from the pad 41 to the chuck 30 with the finger 31.

Next, the double-acting cylinder 28 moves forward, and after moving forward, it rotates and the workpiece 28 is placed between the tip of the shaft 8 and the bell shaft 7.
transport. The double-acting cylinder 28 then moves backward;
The workpiece 22 is moved to the tip and the 8th end face of the groove.
Then, the clamp cylinder 27 operates to move the bell shaft 3 forward via the rack 26 and pinion 25, and the workpiece 22 is firmly fixed by the bell, the chisel 7, and the tip chisel 8. At this time, the chuck 30 opens and the double-acting cylinder 28 moves forward, turns, and returns to the pick-up section 24 side. Then, machining begins, and the outer peripheral portion of the workpiece 22 is machined by the grindstone 15.
When the machining is completed, the grinding wheel 15 retreats, the turning arm 29 again turns to the sharp side, retreats, and the workpiece 22
When the chuck 30 closes, it is fixed by the fingers 31. Then, the clamp cylinder 27 operates and the bell shaft 3 is moved backward. Then, the double-acting cylinder 28 moves forward and brings the rotating workpiece 22 in front of the part 41 of the pick-up section 24. Next, the double-acting cylinder 28 is moved back and the part 41 is adsorbed with negative pressure. After attracting the workpiece 22, the double-acting cylinder 28 moves forward.

The pick-up section 24 receives the workpiece 22
Then, the pick-up cylinder 33 is lowered, and the processed workpiece 22 returns to its original position. In this manner, one cycle is completed, the processed workpiece 22 is transported, and then the unprocessed workpiece 22 is transported to a fixed position and the cycle is repeated.

As shown in the above embodiments, by attaching the workpiece feeding device of the present invention to a horizontal centering machine, the workpiece 22 can be loaded and unloaded in a stable position. Do not damage the workpiece 22, the tip or the cutter 8, etc. by applying force to the part 8.

(2) Since the workpiece 22 can be loaded in a stable position, the centering accuracy of the workpiece 22 is improved.

(3) By adding a line to transport the workpiece 22 to a fixed position, the workpiece 22 can be automatically processed in multiple cycles, so a large number of machines can be handled by one person.

This effect can be obtained.

[Brief explanation of drawings]

Figure 1 and Figure 2 show a known horizontal centering machine.
Figure A is a partially sectional plan view, Figure 1B is a side view, Figure 2 is a partially enlarged sectional view of the clamp section, and Figure 3 is a partial cross-sectional view.
5 to 5 show a workpiece feeding device according to an embodiment of the present invention, FIG. 3 is a perspective view of a centering machine showing the overall configuration, and FIG. 4 shows a rotating part of the workpiece feeding device shown in FIG. A partially enlarged end view showing the pick-up part;
FIG. 5 is a partially enlarged front view of the pickup section. 3... Bell shaft, 4... Bell motor, 7... Bell Yato, 8... Tip Yato, 15... Grinder whetstone, 22... Work, 23... Swivel part, 24...
Pickup part, 28...Double acting cylinder, 29
...Swivel arm, 30...Chuck, 31...Finger, 33...Pickup cylinder, 3
4... Stopper, 36... Spring, 40... Lower arm, 42... Rotating arm, 43... Contact member, 44...
... Upper arm, 45 ... Clamp part.

Claims (1)

[Scope of Claims] 1. A workpiece feeding device that attaches and detaches a workpiece to a centering machine that grinds the outer periphery of a rotating workpiece such as an optical component that is clamped between a bell or a chidle and a tip or chime, a pick-up section that picks up a work placed with the work axis vertical and transfers it to a rotating section with the work axis horizontal; a rotating section that transfers the work between the pick-up section and the clamp section through back-and-forth movement and rotational movement; , a clamp section that transfers the workpiece to and from the revolving section in synchronization with the operation of the pick-up section and the revolving section, and clamps the workpiece between the bell and the tip and the pit; A lower arm having a suction pad for holding the lower arm, a pick-up cylinder for raising and lowering the lower arm, and a means for rotating the lower arm at right angles to the axis of the pick-up cylinder are provided. A work feed device for a centering machine that is characterized by raising and rotating, and rotating and lowering. 2. The swing part is equipped with a double-acting cylinder that moves back and forth and swings, a swing arm attached to the rod of the double-action cylinder, and a chuck with a finger attached to the tip of the swing arm. A workpiece feeding device for a centering machine according to scope 1.