JPH0755435B2 - Work supply / discharge device for NC machine tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention corresponds to an NC machine tool and automatically transfers stocked steel rod-shaped workpieces and temporarily transfers processed workpieces. Device for mechanical storage.

(Prior art) Until now, a long arm was rotated on the turning plate of the base cabinet, and the hand at the end of the arm grips the workpiece from the stock position and sends it to the NC machine tool one stroke at a time, and the machined workpiece is at the specified position. Industrial robots that move to containers are known.

However, this robot requires a large space, and it is extremely inefficient to carry in or out workpieces one by one into an NC machine tool.

(Problems to be Solved by the Invention) The present invention has been made in order to solve the above problems.
Provided is an NC machine tool capable of efficiently moving in a narrow space, having a two-piece holding function for attaching and detaching a work at a predetermined time interval, and capable of stocking a processed work.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention provides an unworked workpiece W.
A stocker K that stores and supplies the work W, a standby mechanism T that sends the work W to a predetermined position from the stocker K, a transport unit D that carries the work W into and out of the NC machine tool, and a processed work W that is stored and discharged. Discharge stocker H.

The medium supply stocker K is composed of a tray 14 having a size in which a work W can be placed in a fairly orderly manner, a bottom surface thereof is gently inclined downward toward the standby mechanism T, and an end of the gentle inclination is opened.

Further, the middle standby mechanism T is provided with a drop feeding unit 9 for temporarily stopping the work W, which has fallen on the bottom surface of the tray 14 of the supply stocker K immediately after the end of the gentle inclination, and the work W is transferred via the transfer means. W is dropped into the holding portion 11 with a slide groove provided at the tip of the drop feeding portion 9, and the work W
Is further provided with a slide arm 12 for moving one by one to the position of the holding portion 11 just below the chuck portion 3.

Further, the middle discharge stocker H is provided with the chuck portion 3
It consists of a tray 16 that is gently inclined downward from the position of the holding portion 11 with the slide groove located right below.

The middle conveyance section D includes a double slide shaft section 1 arranged above the discharge stocker H, an oblique feed hand arm section 2 provided at the front end section thereof, and a chuck section 3 at the tip thereof.

The chuck portion 3 is provided so as to be retractable toward the holding portion 11 with the slide groove by the expansion and contraction of the oblique feed hand arm portion 2 when the double slide shaft portion 1 is contracted, and the chuck portion 3 is provided at the front portion of the chuck portion 3. It has a pair of grip portions 4 and 4 forming a predetermined angle, and applies a rotation of a predetermined angle in the vertical direction to the grip portion 3 and imparts a left-right reciprocating motion to the entire chuck portion 3.

The shafts 5 and 6 of the double slide shaft portion 1, the arm 7 of the oblique feed hand arm portion 2, and the grip portions 4 and 4 of the chuck portion 3 are actuated to reciprocate such as expansion and contraction, movement, and rotation.
The stop is performed by hydraulic pressure or air pressure control.

In addition, the standby mechanism T uses the bottom tray 14 of the supply stocker K.
The workpieces W that have fallen by rotation on the slope are received one by one by the receiving groove 10 of the rotary type drop feeding unit 9, and the workpieces W on the receiving groove 10 are pushed and pulled at points away from the rotation axis. It is rotated by the piston P1 and is dropped into the slide grooved holding portion 11 at the lower front surface of the drop feeding portion 9.

Further, the work W is pushed by the slide arm 12 by the piston P2 to the position just below the chuck portion 3 and sent.

The pistons P1 and P2 are driven by hydraulic pressure or air pressure control.

(Function) Raw work W stored in advance in the supply stocker K
However, the slopes of the bottom tray 14 of the supply stocker K are rotated and dropped, and the rotary type drop-in feed portions 9 are sequentially placed one by one in the receiving grooves 10 in the upward state.

Then, it is confirmed by the sensor S1 that there is no first-arriving work in the upwardly formed slide groove 11a in the lower part of the front surface of the drop feeding part 9, and the work W on the feeding groove 10 is fed by the piston P1. Rotate the groove 10 about 90 degrees to make it sideways,
Therefore, the work W is dropped from the feed groove 10 and moves onto the slide groove 11a.

A slide arm 12 provided near the front part of the slide groove 11a and above the slide groove 11a moves along the slide groove 11a from the outside of the work W on the slide groove 11a to move the work W to the chuck part 3a. Push it out right below and stop,
The slide arm 12 returns to the original position.

The chuck part 3 is a primary piston P3 of the transfer part D provided above the discharge stocker H and a secondary piston interlocked therewith.
With P4, you can move forward and backward by a distance that includes the lengths of both shafts 5 and 6. Therefore, the work W can be fed even if the chuck portion 3 is a distance away from the chuck mechanism of the machining center of the NC machine tool.

At that time, the chuck portion 3 can be moved forward or backward to a predetermined position by a piston P5 obliquely provided on the hand arm fixing portion 13 at the front portion of the double slide shaft portion 1.

Then, the rack 19 and the pinion 18 or the crank mechanism provided on the base axes of the grips 4 and 4 provided on the chuck 3 are rotated 90 degrees in the vertical direction by the piston P6.

When the grip portion 4 stops at a predetermined position for gripping the work W, the work W is gripped or separated by the piston P8 in the grip portion 4.

At this time, the work W sent to the machining center of the NC machine tool is stopped at the center position of the chuck of the NC machine tool, and is reciprocally moved in the lateral direction by the piston P7 provided on the chuck base 17 to move the chuck center of the NC machine tool. Insert or pull out the work W.

The processed work W is returned from the NC machine tool, and the work W is released at a predetermined position in the slide groove 11a.

Then, the upper and lower pistons P9 provided at the lower portion of the holding portion 11 with the slide groove causes the holding portion 11 with the slide groove to move into and out of the hole 20.
Work W rides on the slope of Tray 16 when lowered further down,
Rolling down on the slope toward the lower rear, they are sequentially stored in the discharge stocker H side by side from the lower rear.

Hydraulic pressure or air to be sent to a cylinder 8 provided in each drive unit to start and stop reciprocating operations such as expansion / contraction, movement, and rotation of the slide shafts 5 and 6, the hand arm 7, and the grip portions 4 and 4 of the chuck unit 3. By performing the pressure control, the two grip portions 4 and 4 can simultaneously grip, separate, move, and rotate the unprocessed work W and the processed work W.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, a supply stocker K and a discharge stocker H for placing a work W on an upper portion of a box-shaped base B with casters having a control mechanism built therein. Are separated from each other with the center as the boundary.

One of the separated supply stockers K is provided with a tray 14 which is inclined forward and downward, and the other discharge stocker H is provided with a tray 16 which is inclined downward and rearward and is conveyed above the tray 16. Part D is provided.

A waiting mechanism T for the work W is provided in front of the supply stocker K and the discharge stocker H.

In FIG. 5, the supply stocker K and the standby mechanism T are shown, and the unprocessed work W is the bottom tray 14 of the supply stocker K.
Line up orderly on the slope from below the slope.

On the lower front side of the inclined tray 14, a rotary drop-feed unit 9 is provided in the upper part thereof so that an upward feed-in groove 10 is close thereto.

Then, a receiving groove is formed in the lower part of the rotary drop-feed part 9 by a piston P1 that pushes and pulls a point away from the center of the rotary shaft.
Try to give 10 about 90 degrees forward rotation.

A holding portion (11) with a slide groove is provided in which the feed groove (10) is close to the front lateral position and a slide groove (11a) is formed upward.

From the front portion of the holding portion 11 with the slide groove, the slide groove 11a
A slide arm 12 is provided so as to come close to the upper part of the work W and attach to the work W from the outside.

In FIG. 3, the slide arm 12 reciprocates along the slide groove 11a by a piston P2 provided at the base thereof. This movement of the slide arm 12 causes the slide groove 11a.
The upper work W is slid just below the chuck part 3 and pushed out.

Further, the transport section D provided above the discharge stocker H is the fourth
In the figure, the bottom portion of the double slide shaft portion 1 is fixed to the support column 15 fixed to the base B to form a two-stage structure in which the lower primary piston P3 and the upper secondary piston P4 are interlocked,
The shafts 5 and 6 attached to the respective shafts can be moved forward and backward by a distance including the length of the shafts.

Then, a hand arm fixing portion 13 is provided at the front end portion of the double slide shaft portion 1 and a hand arm 7 having a chuck portion 3 at the tip of the fixing portion 13 is extended obliquely forward and downward.

The chuck portion 3 has a pair of grip portions 4 and 4 which form an angle of about 90 degrees in the front and rear at a front portion thereof, and a rack 19 and a pinion 18 provided on a central shaft of the grip portion base portion are reciprocated by a piston P6 by reciprocating them. The grip portions 4 and 4 are reciprocally rotated by about 90 degrees in the vertical direction, and a left and right reciprocating motion is imparted to the whole chuck portion by a piston P7 built in the chuck base.

It is also possible to use a crank mechanism instead of the rack 19 and the pinion 18 to impart reciprocating rotation to the grip portions 4 and 4.

Further, the handle portion 4 has a built-in piston P8 that opens and closes the handle to sandwich and hold the work.

Then, in the lower part of the holding portion 11 with slide groove in the front part of the discharge stocker H, a slide hole 20 is formed in which the holding portion 11 with slide groove vertically appears on the shaft of the piston P9 fixed to the base B.
Install by penetrating.

When the slide groove 11a is lowered from the slope tray 16 surface, the work W is transferred to the slope tray 16 surface, and the work W rolls on the slope toward the lower rear of the tray 16 and is sequentially stored in the discharge stocker H side by side from the lower rear. .

Then, sensors S1 and S2 for confirming the presence or absence of the work W are provided in the slide groove 11a.

Pistons P1 to P9 of the respective operating parts such as the drop feeding part 9, the slide arm 12, the shafts 5 and 6 of the double slide shaft part 1, the arm 7 of the hand arm part 2 and the grip parts 4 and 4 of the chuck part 3. The reciprocating operation is started and stopped by hydraulic or air pressure control provided inside the box-shaped base B.

Auxiliary guide shafts G1 and G are attached to each shaft and arm.
2. Reinforce with G3.

When a certain amount of the work W is accumulated in the discharge stocker H, the worker collects it and takes it out.

(Operating Procedure) A series of operations of the present invention are performed in the following procedure.

(1) Preliminarily store a predetermined number on the slope of the bottom tray 14 of the supply stocker K.

(2) Sequentially step on the receiving grooves 10 of the rotary type drop feeding unit 9 one by one.

(3) It is confirmed by the sensor S1 that there is no first-arriving work in the slide groove 11 in the lower part of the front surface of the falling feed part 9.

(4) Rotate the work W on the feed groove 10 by about 90 degrees and drop it on the slide groove 11a.

(5) The slide arm 12 moves along the slide groove 11a from the outside of the work W on the slide groove 11a, pushes the work W right under the chuck portion 3, and stops moving.

(6) Return the slide arm 12 to the original position.

(7) The hand arm 7 is advanced to a position where the work on the slide groove 11a enters between the open grips 4.

(8) The work W is gripped by the one grip portion 4 facing downward.

(9) While holding the work W, the hand arm 7 is retracted.

(10) While holding the work W, the primary piston P3 of the transfer section D and the secondary piston P4 that is interlocked with the primary piston P3.
Then, the lengths of both shafts 5 and 6 are added and horizontally advanced to a preset position up to the chuck mechanism of the machining center of the NC machine tool N and stopped.

(11) The NC machine tool is operated by extending the hand arm by the piston P5 obliquely provided on the hand arm fixing portion 13 at the front part of the double slide shaft portion 1 and opening the grip portion 4 of the chuck portion 3 not holding the work W. Advance to N chuck center and stop.

(12) The chuck part 3 is moved laterally by the piston P7 at its base.

(13) The processed work W is gripped by the handle 4.

(14) While holding the machined workpiece W, move the chuck part 3 by the piston P7 at the base part in the lateral direction opposite to (12) and move to NC.
The processed work W is extracted from the machine tool N.

(15) Move the handle 4 holding the unprocessed work W forward
Rotate 90 degrees and turn from the bottom to the front.

(16) The chuck part 3 is moved laterally by the piston P7 at the base thereof, and the unprocessed work W is inserted and set in the center of the chuck of the NC machine tool N.

(18) Open the grip 4 and release the unprocessed work W.

(19) While holding the processed work W, the chuck portion 3 is moved in the lateral direction opposite to (16) by the piston P7 at the base portion thereof.

(20) Hand arm 7 while holding processed workpiece W
Retreat.

(21) While gripping the processed work W, the chuck portion 3 is moved backward from the machining center of the NC machine tool N to a preset original position and stopped by interlocking the primary shaft 5 and the secondary shaft 6.

(22) Confirm that there is no work W in the slide groove 11a with the sensor S2.

(22) While holding the processed work W, the hand arm 7
To the same position as (7).

(23) Pull down the handle part 4 holding the unprocessed work W.
Rotate 90 degrees and change the direction from the front to the bottom.
Place the processed work W on a.

(24) Open the handle 4 and release the processed work W.

(25) When the slide groove 11a on which the processed work is placed descends and is lowered below the recess / emergence hole 20, the processed work W is transferred to the slope of the tray 16 and rolls on the slope toward the lower rear of the discharge stocker H. They are sequentially stored in the discharge stocker H side by side from the lower rear side.

The above operation procedure is repeated.

EFFECTS OF THE INVENTION The present invention is as described above, and the stock portions K and H and the standby mechanism T are provided.
The transporting section D is compactly integrated, is easy to move and set, and can be efficiently moved in a narrow place. Therefore, the working environment is improved and the working efficiency is improved.

In addition, as unmachined workpieces can be loaded into the NC machine tool and processed workpieces can be unloaded simultaneously, the working time can be shortened and economic efficiency is improved.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a perspective view, FIG. 2 is a side view on the side of the transport section D, and FIG. 3 is a plan view of a part of the tray 14 and a standby mechanism T with the chuck section 3 notched. 4 and 5 are side views of the transport section D and the discharge stocker H, and FIG. 5 is a side view of the supply stocker K and the standby mechanism T. 1 ... Double slide shaft part, 2 ... diagonal feed hand arm part, 3 ... chuck part, 4 ... grip part, 5,6 ...
… Slide shaft, 7 …… Hand arm, 8 …… Cylinder, 9 …… Drop feed part, 10 …… Feed groove, 11 …… Holder with slide groove, 11a …… Slide groove, 12 …… Slide arm , 13 ...... Hand arm fixing part, 14 ...... Slope tray, 15 …… Conveyor column, 16 …… Slope tray, 17 …… Chuck base, 18 …… Pinion, 19 …… Rack, 20 …… With slide groove Retaining hole of holding part, 21 …… Operation panel, W…
… Work, K… Supply stocker, T… Standby mechanism, D
…… Conveyor, H …… Discharging stocker, B …… Box type stand,
S1, S2 ... Sensor, P1, P2, P3, P4, P5, P6, P7, P
8, P9 ... Piston, G1, G2, G3, ... Auxiliary guide shaft, N ... NC machine tool.

Claims (2)

[Claims] 1. A supply stocker K for storing and supplying an unprocessed round bar-shaped work W, and a work W up to a predetermined position from the supply stocker K.
The medium supply stocker K is composed of a standby mechanism T for sending out the work W, a carrying section D for carrying the work W into and out of the NC machine tool, and a discharge stocker H for storing and discharging the processed work W. Has a size in which it can be placed in order, and the bottom surface of the tray 14 is gently inclined downward toward the standby mechanism T and the end of the gentle inclination is opened. The stocker K is provided with a drop feeding unit 9 for temporarily stopping the work W that has fallen on the bottom surface of the tray 14 immediately after the end of the gentle inclination, and the work W is transferred to the tip of the drop feeding unit 9 through the transfer unit of the work W. The discharge stocker H is provided with a slide arm 12 that drops the work W into a holding portion 11 with a slide groove and moves the work W one by one to the position of the holding portion 11 directly below the chuck portion 3. Three Made from the position of the slide grooved holding portion 11 immediately below the tray 16 which is gently inclined downward,
The middle conveyance section D comprises a double slide shaft section 1 arranged above the discharge stocker H, an oblique feed hand arm section 2 provided at the front end section thereof, and a chuck section 3 at the tip thereof. The double slide shaft portion 3 is provided so as to be retractable toward and away from the holding portion 11 with the slide groove by the expansion and contraction of the oblique feed hand arm portion 2 when the double slide shaft portion 1 is in a contracted state. And a pair of grip portions 4 and 4 formed therein, which are rotated by a predetermined angle in the vertical direction and are reciprocated left and right to the entire chuck portion 3, thereby forming the shafts 5 and 6 of the double slide shaft portion 1. And the arm 7 of the diagonal feed hand arm unit 2
And a work feeding / discharging device for an NC machine tool, wherein start / stop of reciprocating operations such as expansion / contraction, movement, and rotation of the grips 4 and 4 of the chuck 3 are controlled by hydraulic pressure or air pressure. 2. A standby mechanism T receives workpieces W, which have been rotated and dropped on the slope of the bottom tray 14 of a supply stocker K, one by one by a receiving groove 10 of a rotary type feeding unit 9, and this receiving groove is received. The work W on 10 is rotated by a piston P1 that pushes and pulls a point away from the rotation axis, and is dropped into a holding part 11 with a slide groove at the lower front surface of the drop feeding part 9, and the work W is further slid. The work for an NC machine tool according to claim 1, wherein the arm 12 pushes the piston P2 directly below the chuck portion 3 to feed the piston P1 and P2 by hydraulic or pneumatic control. Supply and discharge device.