JP2719596B2 - Automatic bar feeder control method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an automatic bar feeder control method, and in particular, when feeding and processing a bar to an automatic lathe, the overall length of the bar before processing,
Performing while counting the length of each processed part, the length of the remaining material, etc., stopping the bar at a predetermined bar end stop position in the automatic lathe, processing of the remaining material, a plurality of different lengths The present invention relates to an automatic bar feeder control method for reliably and easily monitoring the feed when processing a processed part. (Prior Art) Conventionally, as control when a bar is fed by an automatic bar feeder, control using a mechanical limit switch or control using an encoder is known. (Problems to be Solved by the Invention) However, what is performed by the limit switch is merely for detecting the tip of the bar or the like, and in the case of using an encoder, the bar is stopped beyond the stop position. In such a case, only the extra length that has been detected is detected.When unattended driving at night becomes a problem, for example, when the length of remaining material brought back by the feed bar exceeds a predetermined value. , And monitoring of feed when processing a plurality of processing parts having different lengths. Therefore, an object of the present invention is to feed a bar to an automatic lathe and process it while counting the total length of the bar before processing, the length of each processed part, the length of the remaining material, and the like. For unmanned night operation, the material is stopped at a predetermined bar end stop position on an automatic lathe, the processing of remaining material, and the monitoring of feed when processing multiple parts with different lengths is performed reliably and easily. An object of the present invention is to provide a suitable automatic bar feeder control method. (Means for Solving the Problems) In order to achieve the above object, according to the present invention, in a control method of an automatic bar feeder for feeding a bar from an automatic bar feeder to an automatic lathe, By the primary feed slider to the clamp position along the primary feed rail, count the feed amount of the primary feed slider from the first reference position,
At the clamp position, the bar is transferred to and held by the feed bar, and further, the bar is fed toward the automatic lathe, the feed amount of the feed bar from the second reference position is counted, and the front end of the automatic bar feeder is The passage of the leading end of the bar is detected by a leading end detecting device disposed at a predetermined position on the side, and corresponds to the feed amount of the primary feed slider from the first reference position when the passage of the leading end is detected. A count value and a predetermined distance between the first reference position and the bar tip detection device, or a count value and a second value corresponding to the feed amount of the feed bar from the second reference position when the passage of the tip is detected. The length of the bar is calculated based on the reference position of the bar and a predetermined distance between the bar tip detecting device, and based on the calculated value, the bar is moved to a predetermined bar tip stop position in the automatic lathe. Feeding, automatic bar feeder control The law is provided. (Example) Next, the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view showing an automatic bar feeder of the present invention. The main configuration of this automatic bar feeder is the same as that of the present applicant except for the first encoder and the second encoder.
Since the configuration of the automatic bar feeder described in Japanese Patent No. 52897 is almost the same, a detailed description thereof will be omitted. That is, only the components of the automatic bar feeder of the present invention will be described. The linear guide rail 1 is movably attached to a leg (not shown) of the automatic bar feeder in a lateral direction via a support member (not shown), that is, at a right angle to the bar feed direction. ing.
The primary feed guide rail 2 is similarly movably mounted laterally to a leg (not shown) of the automatic bar feeder via another support member (not shown). The primary feed rail 3 is for receiving and temporarily holding a bar from a supply shelf (not shown), and is fixed to a leg of the automatic bar feeder. As shown in the figure, the primary feed rail 3 has a V-shaped section at the rear end and an L-shaped section at the front end. The feed bar 4 is slidably movable with respect to the linear guide rail 1,
Further, it is fixed to the moving bush 27 and the fixed bush 28 via the linear bearing unit 30. A finger chuck 7 is attached to the leading end of the feed bar 4 via a joint adapter 5 and a chuck joint 6, and the rear end of the bar is gripped by the finger chuck 7 and fed to the automatic lathe 100. The main motor 8 is also mounted so as to move laterally with respect to the legs of the automatic bar feeder, and the power from the main motor 8 is supplied from the drive sprocket and chain 25 to the main front sprocket 16 and the main rear sprocket and chain. The moving bush 27 and the fixed bush 28 are moved back and forth via the chain, and as a result, the feed bar 4 is moved.
The first motor is connected to the main motor 8 via a coupling 12.
The encoder 10 is connected, and the first encoder 10
A pulse corresponding to the feed amount of the feed bar 4 is sent to a controller (not shown) for controlling the operation of the automatic bar feeder. A main feed brake 14 is provided for the main motor 8. The primary feed motor 9 is also mounted so as to move laterally with respect to the legs of the automatic bar feeder, and the power from the primary feed motor 9 is driven by the drive sprocket and the chain 26.
From the primary feed front sprocket 18 and the primary feed rear sprocket 20 through the primary feed endless chain
The primary feed slider moving hook 33 is transmitted to the primary feed guide rail 19 and is slidably guided by the primary feed guide rail 2. The hook 33 pushes the rear end of the bar from the primary feed rail 3 to feed the bar to the clamp position. A second encoder 11 is connected to the primary feed motor 9 via a coupling 13. The second encoder 11 is provided at a predetermined position at a rear end of the bar for controlling the operation of the automatic bar feeder. A pulse corresponding to the feed amount (position m1 behind the clamp 34) is transmitted to a controller (not shown), and a pulse signal corresponding to the feed amount for monitoring the length of the bar or the like is sent to the controller (not shown). Z)
To send to. Also, a primary feed brake 15 is provided for the primary feed motor. Also, the automatic bar feeder has a rear end origin detection sensor 2
1, an overrun detection limit switch 22, a primary feed rear end detection sensor 23, and a primary feed advance end detection sensor 24 are provided. Further, a vertical movement cylinder 31 for a tip detection device is provided, and moves up and down a bar tip detection sensor 32 attached to the upper end thereof. Further, a bar rear end reference plate 35 is provided adjacent to the rear end of the V-shaped primary feed rail 3. A clamp 34 is provided for clamping the bar prior to gripping the rear end of the bar with the finger chuck 7. The automatic lathe 100 includes a main shaft 102 provided with a three-jaw chuck 101 on the distal end side, and a cut-off bit 103 provided in front of the main shaft 102.
And In the drawings, L, L1, l1, m1 to m6, n1 to n3 are members,
A predetermined length such as between a member and a sensor is shown, and a particularly important length will be described later in the description of operation. The symbol P indicates the moving pitch of the feed bar or the like that moves in the lateral direction, and the feed bar or the like has a position (A) for sending the bar by the feed bar and a position (B) for receiving the bar from the supply shelf. Moved between. The operation of the automatic bar feeder of the present invention is as follows. First, the bars are supplied to the primary feed rail from a bar supply shelf (not shown). Next, the primary feed slider moving hook 33 moves forward from a predetermined first initial position,
The supplied bar is fed by a predetermined distance along the primary feed rail until its rear end reaches m1 behind the clamp.
In the meantime, the second encoder 11 transmits a pulse corresponding to the feed amount of the primary feed slider moving hook 33 to a controller (not shown), and the controller counts it. Further, a bar tip detection sensor 32 for detecting passage of the tip of the bar is provided at a position in front of the bar feeder. When the length of the bar is longer than the distance from the position m1 behind the clamp 34 to the bar tip detection sensor 32, that is, the distance (m1 + m2) shown in FIG. While the bar is being fed, passage of the bar tip is detected by the bar tip sensor 32. When the length of the bar is longer than (m1 + m2), the length of the bar is determined by the count value corresponding to the feed amount of the primary feed slider moving hook 33 at the time of detecting the passage of the tip of the bar, and the primary value. The calculation is performed based on the first initial position of the feed slider moving hook 33 and a predetermined distance between the rod tip detection sensor 32 and the first initial position. If the length of the bar is shorter than (m1 + m2), the front end of the bar does not pass through the bar front end detection sensor 32 while the bar is being fed by the primary feed slider moving hook 33. Therefore, the length of the bar is calculated as follows. After the primary feed is completed, the bar is clamped by the clamp 34. In this state, the main motor 8 is operated, the feed bar 4 is fed from the second initial position, and the bar is fed by the finger chuck 7 provided at the tip thereof. The rear end of the material is retained. Next, the clamp of the bar by the clamp 34 is released, and the bar is fed further forward by the feed bar 4. During this time, a pulse corresponding to the feed amount of the feed bar from the second initial position is transmitted to the controller by the first encoder 10, and the controller counts it.
If the length of the bar is shorter than the distance of (m1 + m2), the passage of the front end of the bar is detected by the bar end sensor 32 while the bar is being fed by the feed bar 4. Therefore, when the length of the bar is shorter than (m1 + m2), the length of the bar is determined by the count value corresponding to the feed amount of the feed bar at the time when the passage of the tip of the bar is detected, and the length of the feed bar. 2 is calculated based on the initial position 2 and the predetermined distance between the rod end detection sensor 32. Next, after the tip of the bar is detected, the bar is further fed to a predetermined bar stop position (m3), and the first bar is stopped.
A pulse is sent by the encoder 10 to the controller. The bar is shorted at this position by the length of n3, so that the length of the bar is (L1-n3). Next, the bar is processed by an automatic lathe. The length of the processed part is determined by the first encoder 10 by sending a pulse corresponding to the feed amount of the feed bar from when the collet chuck is closed to when it is opened to the controller. The length of the remaining material is determined based on the length of the bar and the length of the processed part. For example, if only 250 mm of remnant can be brought back due to the structure of the bar feeder, longer remnants cannot be discharged.
Shortcut to 0mm or less. (Effects of the Invention) As described above in detail, the present invention provides a method of feeding a bar to an automatic lathe and processing the bar, the entire length of the bar before processing, the length of each processed part, and the length of the remaining material. It is possible to stop the bar at a predetermined bar end stop position on an automatic lathe, count remaining material, monitor the feed when processing multiple processed parts with different lengths, etc. It is possible to obtain an automatic bar feeder control method suitable for unattended night driving that is performed easily and easily.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic perspective view showing an automatic bar feeder of the present invention. 1 Linear guide rail 2 Primary feed guide rail 3 Primary feed rail 4 Feed bar 5 Joint adapter 6 Chuck joint 7 Finger chuck 8 Main motor 9 Primary feed Motor 10 First encoder 11 Second encoder 13 Coupling 14 Main feed brake 15 Primary feed brake 16 Main front sprocket 17 Main rear sprocket and chain 18 Primary feed Front sprocket 19 for primary feed Endless chain 20 Primary feed rear sprocket 21 Origin detection sensor 22 for rear end Overrun detection limit switch 23 Primary feed rear end detection sensor 24 Primary feed advance end Detection sensor 25: Drive sprocket and chain 26: Drive sprocket and chain 27 Moving bush 28 ... Fixed bush 29 ... Linear bearing 30 ... Linear bearing unit 31 ... Vertical movement cylinder 32 for tip detection device ... Bar detection sensor 33 ... Primary feed slider moving hook 34 ... Clamp 35 …… the bar end reference plate 100 …… the automatic lathe 101 …… the three-jaw chuck 102 …… the main spindle 103 …… the cutting tool L, L1, l1, m1, m2, m3, m5, m6, n1, n2, n3 ... length P ... pitch.

Claims (1)

(57) [Claims] In a control method of an automatic bar feeder for feeding a bar from an automatic bar feeder to an automatic lathe, the bar is fed by a primary feed slider to a clamping position along a primary feed rail, and a first feeder of the primary feed slider is used.
Counting the feed amount from the reference position, and transferring and holding the bar to the feed bar at the clamp position, further feeding the bar toward the automatic lathe, and feeding the feed bar from the second reference position. The passage of the leading end of the bar is detected by a bar leading end detecting device arranged at a predetermined position on the front end side of the automatic bar feeder, and the first feed slider of the primary feed slider at the time of detecting the passage of the leading end is detected. A count value corresponding to the feed amount from the first reference position and a predetermined distance between the first reference position and the bar tip detection device;
Alternatively, based on a count value corresponding to the feed amount of the feed bar from the second reference position when the passage of the leading end is detected, and a predetermined distance between the second reference position and the bar leading end detecting device, And calculating the length of the bar and feeding the bar to a predetermined bar end stop position in the automatic lathe based on the calculated value. 2. The counting of the feed amount of the feed bar is performed based on the pulse transmitted by the first encoder, and the counting of the feed amount of the bar by the primary feed slider is performed based on the pulse transmitted by the second encoder. The method according to claim 1, wherein the method is performed. 3. When the tip of the bar is detected by the bar tip detecting device when feeding the bar with the primary feed slider, the calculation of the length of the bar is counted based on the pulse transmitted by the second encoder. 3. The method according to claim 2, wherein the method is performed based on a count value. 4. When the tip of the bar is detected by the bar tip detecting device when the bar is fed by the feeding bar, the calculation of the length of the bar is performed by the counting value counted based on the pulse transmitted by the first encoder. 3. The method according to claim 2, wherein the control is performed based on the following. 5. Furthermore, the length of the processed part processed by the automatic lathe is counted, and the length of the remaining material is calculated based on the counted value of the length of the bar and the length of the processed part. The method according to any one of claims 1 to 4, wherein when the length exceeds a predetermined value, the remaining material is cut to a predetermined length or less, and then the remaining material is processed. .