JP4705441B2 - Release control device for leveler feeder - Google Patents

Description

  The present invention relates to a leveler feeder provided in a machine tool such as a press machine, and more particularly to a release control device for a leveler feeder that improves the release followability of the leveler feeder when the speed of the machine tool is increased.

  As a leveler feeder provided in a press machine, what was disclosed by the following patent document 1 is known. This leveler feeder is shown in FIGS.

  As shown in FIG. 4, the leveler feeder includes a lower feed roll 14, an upper feed roll 15, a lower work roll (lower correction roll) 13, and an upper work roll (upper correction roll) 5. By driving the pair of upper and lower feed rolls 14 and 15 and the work rolls 5 and 13 with a motor (not shown), the material 17 was wound around an uncoiler (not shown) when passing between the pair of upper and lower work rolls 5 and 13. The curl due to and is removed, and the paper is fed to a press machine (not shown) through a pair of upper and lower feed rolls 14 and 15.

  The lower feed roll 14 is fixed in position, but the upper feed roll 15 is connected to the air cylinder 16 so that it can move up and down, and the pair of feed rolls 14 and 15 are released (closed or closed). Clamping) and release opening (opening) can be performed alternately. The position of the lower work roll 13 is also fixed, but the position of the upper work roll 5 is fixed to the bearing frame 6 that can swing around the fulcrum shaft 7. The free end of the bearing frame 6 is pivotally supported by one end of a lever 10 having a fulcrum shaft 11, and the other end of the lever 10 is connected to an air cylinder 9, so that the upper work roll 5 can also move up and down. It has become. Thus, the pair of work rolls 5 and 13 can alternately perform release closing and release opening.

  As shown in FIG. 5 and FIG. 6, the leveler feeder uses the air cylinders 16 and 9 for feed rolls and work rolls and feed rolls by the CPU 24 according to the rotation angle of the rotary cam 20 that rotates together with the press. A feed motor servo amplifier 26 for driving a work roll feed motor (not shown) is controlled. The rotational angle of the rotary cam 20 is measured in the clockwise direction with the top dead center φ0 of the press machine being 0 ° and the bottom dead center φπ being 180 °.

  By the way, when the rotation angle of the rotary cam 20 is in the range of the feed angle ψs from φ4 (240 °) to φ1 (120 °), the die of the press machine is raised. The angle ψr between the rotation angles of the rotary cam 20 from φ1 to φ4 interferes with the die of the press machine and the material 17, and therefore the material 17 cannot be sent to the press machine.

  When the rotation angle of the rotary cam 20 is from φ2 (150 °) to φ3 (210 °), the material is positioned by the material fixing pilot pin provided in the mold being inserted into the material 17. At this time, the feed rolls 14 and 15 and the work rolls 5 and 13 are released.

  Now, when the press machine rotates and the leveler feeder completes the feeding of the material 17 and the rotational angle of the rotary cam 20 reaches φ2 (150 °), the pilot pin provided on the mold starts to stick into the material 17. . At this time, the rotary cam 20 outputs a release opening command signal b. When detecting the release opening command signal b, the CPU 24 transfers the release opening command signal b to the air cylinders 16 and 9 for the feed roll and the work roll, and releases the feed rolls 14 and 15 and the work rolls 5 and 13. Start the action to open.

  When the rotation angle of the rotary cam 20 reaches φ′2 before the bottom dead center (180 °), the mold starts pressing the material 17. By this time, the feed rolls 14 and 15 and the work rolls 5 and 13 must have completed the release opening operation.

  When the rotation angle of the rotary cam 20 passes through the bottom dead center φπ (180 °) and becomes φ′π, the pressing of the material 17 is completed. At this time, the rotary cam 20 outputs a release closing command signal c. When detecting the release closing command signal c, the CPU 24 transfers the release closing command signal c to the air cylinders 16 and 9 for the feed roll and the work roll, and releases the feed rolls 14 and 15 and the work rolls 5 and 13. Start the closing action.

  It is also possible to send the release opening command signal b and the release closing command signal c from the rotary cam 20 directly to the air cylinders 16 and 9 without going through the CPU 24.

  When the rotation angle of the rotary cam 20 becomes φ3 (210 °), the pilot pins provided on the mold come out of the material 17. After the pilot pin is removed from the material 17, the material roll cannot be held unless the material 17 is clamped by the feed rolls 14 and 15 and the work rolls 5 and 13, so that by this time, the feed rolls 14 and 15 And the work rolls 5 and 13 must complete the release closing operation.

  When the rotation angle of the rotary cam 20 becomes φ4 (240 °), there is no interference between the die of the press machine and the material 17, so the rotary cam 20 outputs a feed start permission signal d. When the CPU 24 detects the feed start permission signal d, it immediately outputs a motor rotation command signal f to the feed roll / work roll feed motor servo amplifier 26 to start feeding the material 17. Feeding of the material 17 is completed according to a predetermined feed length, feed speed, and acceleration / deceleration time.

  When the rotation angle of the rotary cam becomes φ1 (120 °), a press interference signal a is output informing that interference between the press die and the material 17 occurs. When the CPU 24 detects that the feeding of the material 17 to the press machine is not completed by the time when the press interference signal a is received, the CPU 24 stops the feeding of the material 17 suddenly and sends an abnormal signal to the press machine. To send an alarm.

  When there is no abnormality in the press and the rotation angle of the rotary cam becomes φ2 (150 °), the pilot pin provided on the mold starts to pierce the material 17, and the rotary cam 20 issues a release opening command signal b to feed roll 14 and 15 and the work rolls 5 and 13 start a release opening operation. Thereafter, the leveler feeder repeats the release opening and closing and the material 17 feeding operation. Note that the values of the angles φ1 to φ4 described above are merely examples, and values different from the values shown here may be selected.

  In addition, when the rotation angle of the rotary cam is near the top dead center φ0 (0 °), a top dead center signal e is output from the rotary cam 20. The press fixed position is confirmed by the top dead center signal e and used for various interlocks.

Thus, as described above, the leveler feeder moves the upper feed roll 15 and the upper work roll 5 up and down, and the feed rolls 14 and 15 and the work rolls 5 and 13 are alternately opened and closed and released. The material 17 is fed to the press during closing and the material 17 is pressed during release opening.
JP 2004-82205 A

  In general, in the leveler feeder as disclosed in Patent Document 1, the rotation angle of the press machine is increased after ensuring the feed angle ψs as wide as possible outside the interference range between the mold and the material 17, It is desirable to perform the feed operation using the feed angle ψs as much as possible. However, in the case of an actual leveler feeder, it is often impossible to increase the rotation speed of the press machine to the point where the feed angle ψs is fully used.

  One reason why the rotational speed of the press cannot be increased is that the maximum rotational speed is limited by the performance of the mold, the press, and the entire equipment. However, this reason is rare, and the most frequent reason why the rotation speed of the press machine cannot be increased is that the number of release followers of the leveler feeder is a bottleneck. In addition, the number of release follow-ups becomes a bottleneck, and it is often impossible to increase even the rotational speed restricted by the above-mentioned conditions. For this reason, in order to increase the rotation speed of the press machine, it is necessary to increase the number of release followers of the leveler feeder. In particular, since the upper work roll 5 is heavy, the upper work roll 5 is less responsive than the upper feed roll 15, and the responsiveness of the upper work roll 5 is an obstacle to increasing the number of release follow-ups.

  By the way, in the release of the leveler feeder, when the pilot pin provided in the mold starts to pierce the material 17 (rotary cam rotation angle φ2), the feed rolls 14 and 15 and the work rolls 5 and 13 are released and opened. The feed rolls 14 and 15 and the work rolls 5 and 13 are completely released and opened at the start of press processing (rotary cam rotation angle φ′2), and at the end of press processing (rotary cam rotation angle φ At 'π), the feed rolls 14 and 15 and the work rolls 5 and 13 start to close to release, and the feed rolls 14 and 15 and the work rolls by the time when the pilot pin comes out of the material 17 (rotation angle φ3 of the rotary cam). 5 and 13 are made to complete the release closing. Accordingly, the time that can be used for opening and closing the release is limited from the time φ2 at which the pilot pin begins to pierce the material 17 to the time φ3 at which the pilot pin comes out of the material 17.

  Therefore, conventionally, in order to increase the number of release follow-ups, the device has been devised to increase the release operation speed of the leveler feeder itself, but there is a limit due to the current mechanical structure and operation principle. In particular, since the upper work roll 5 has a heavy weight, the time required to move the upper work roll 5 up and down considerably requires a limit to the number of release follow-ups. Specifically, the rotation angle of the rotary cam 20 that can be used to move the upper work roll 5 up and down is about 60 ° from φ2 (150 °) to φ3 (210 °) at the maximum, and the number of release follow-ups Is limited by the fact that the rotation angle of the rotary cam 20 that can be used for the release is determined to be about 60 °. In addition, in order to increase the release speed of the leveler feeder itself, it is necessary to change the structure of the leveler feeder, which increases the cost. Moreover, even if the structure is changed, the release operation speed is limited as described above.

  The present invention has been made in view of the above problems, and it is an object of the present invention to increase the number of release follow-ups in a release control device for a leveler feeder of a machine tool without changing the structure of the leveler feeder.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a leveler feeder comprising a pair of feed rolls that sandwich a material and send it to a machine tool, and a pair of work rolls that sandwich the material and take a curl. In the release control apparatus of the present invention, the feed roll starts release opening after a pilot pin for fixing the position of the material starts to pierce the material, and completes the release opening until the start of press working of the material. Release closing is started after the machine has passed the bottom dead center and press working is completed, and release closing is completed by the time the pilot pin comes out of the material, and the work roll has completed feeding of the material Later, the release opening was started and the release opening was completed by the start of pressing the material, and the machine tool passed the bottom dead center and the pressing was completed. After the release closing starts, characterized by complete release closed by the time feed start of the material.

  The invention according to claim 2 is a release control device for a leveler feeder comprising a pair of feed rolls that sandwich a material and send it to a machine tool, and a pair of work rolls that sandwich the material and take a winding rod. While the material is being sent to the machine tool, the feed angle at which the machine tool rotates is distributed symmetrically to both the front and rear sides of the top dead center, and the feed start is greater than the angle at which the interference between the material and a part of the machine tool disappears. An angle is determined, and the work roll is released and opened from the time when the feeding of the material is completed to the time when pressing is started, and the feeding start angle is determined when the machine tool passes the bottom dead center and completes pressing. It is characterized in that the release is closed by the time when the value is reached.

  The invention according to claim 3 is the invention according to claim 2, wherein the feed start angle is a feed start permission signal by detecting an angle at which the rotation angle detector causes no interference between the material and a part of the machine tool. Is detected by the passage of a delay time determined from the feed time calculated from the feed length, feed speed, acceleration time and deceleration time of the material, the rotational speed of the machine tool and the angle at which the interference disappears. It is characterized by doing.

  According to the first aspect of the present invention, since the work roll with poor responsiveness is started to open when the feeding of the material is completed, and the closing of the release is completed by the start of feeding the material, Release opening is started when the pilot pin begins to pierce the material, and the rotation angle of the machine tool being released is increased compared to the case where the release closing is completed by the time the pilot pin is removed from the material. , Can secure a lot of time available for work roll release. As a result, the leveler feeder can increase the number of release follow-ups with almost no cost by changing the software and electrical wiring without changing the mechanical structure.

  According to a second aspect of the present invention, the feed angle at which the machine tool rotates while feeding the material to the machine tool is distributed symmetrically to both the front and rear sides of the top dead center, and the interference between the material and a part of the machine tool. Since the feed start angle larger than the angle at which the loss occurs is determined, the feed angle can be made as small as possible, and the angles that can be used for release opening and release closing are equally allocated and the largest possible angle can be obtained. And work rolls with poor responsiveness are released and opened from the completion of material feed to the start of press processing, and are released and closed from the completion of press processing until the feed start angle is reached. Release opening is started when the pilot pin begins to pierce the material, and the rotation angle of the machine tool being released is increased compared to the case where the release closing is completed by the time the pilot pin is removed from the material. , Can secure a lot of time available for work roll release. As a result, the leveler feeder can increase the number of release follow-ups with almost no cost by changing the software and electrical wiring without changing the mechanical structure.

  The invention according to claim 3 is further characterized in that the feed start angle is detected after the rotation angle detector detects an angle at which the interference between the material and a part of the machine tool is eliminated and a feed start permission signal is output. Since the leveler feeder is detected by the passage of the delay time determined from the feed time calculated from the length, feed speed, acceleration time and deceleration time, the rotational speed of the machine tool and the angle at which the interference disappears, the leveler feeder Requests can be made without changing the setting and structure of the rotary cam that has been used as a detector. The number of release follow-ups can be increased while obtaining the same effect as that of the invention according to item 2.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a release control device for the leveler feeder. FIG. 2 is a diagram for explaining the operation of the release control device. FIG. 3 is a diagram for explaining a method for calculating the feed time used for feeding the material 17 to the press machine (machine tool).

  The structure of this leveler feeder is the same as the conventional one shown in FIG. Therefore, the description of the structure of the leveler feeder is omitted.

  As shown in FIGS. 1 and 2, this leveler feeder also outputs a press interference signal a when the rotation angle of the rotary cam 20 becomes φ1 (120 °), and the rotation angle of the rotary cam 20 becomes φ2 (150 )), The release opening command signal b for releasing the feed rolls 14 and 15 is output. When the rotation angle of the rotary cam 20 passes the bottom dead center φπ (180 °) and becomes φ′π, the feed roll 14 and 15 and the release closing command signal c for releasing and closing the work rolls 5 and 13 are output, and the feed start permission signal d is output when the rotation angle φ4 (240 °) of the rotary cam 20 is reached. When the rotation angle becomes the top dead center φ0 (0 °), the top dead center signal e is output in the same manner as the conventional one.

  However, in this leveler feeder, when the rotational angle of the rotary cam 20 is φ2, the release opening command signal b is sent from the rotary cam 20 via the CPU 24 or directly to the feed rolls 14 and 15 via the CPU 24 or directly. The work rolls 5 and 13 are sent to the cylinder 16, but as soon as the CPU 24 confirms the completion of feeding the material 17, a release opening command signal b ′ is sent from the CPU 24 to the work roll air cylinder 9. The rotation angle of the rotary cam 20 when the release opening command signal b 'is output is φ6 before φ2.

Further, in this leveler feeder, even if the rotation angle of the rotary cam 20 becomes φ4 at which the interference between the mold and the material 17 is eliminated and the feed start permission signal d is issued, the feed of the material 17 is not started immediately, and the CPU 24 However, when the rotation angle of the rotary cam 20 reaches the feed start angle φ5 after a delay time from when the feed start permission signal d is received, the feed start command signal d ′ is detected inside the CPU 24 and the motor rotation command signal is detected. f ′ is sent to the servo amplifier 26 for the feed motor, and the feed of the material 17 is started.
A method for determining the timing for detecting the feed start command signal d ′ will be described with reference to FIGS.

  First, a feed time t (sec) that can be used for feeding the material 17 is calculated. As shown in FIG. 3, the feed length of the material 17 is L (mm), the maximum feed speed is V (mm / sec), and the acceleration time (time from the speed 0 to the maximum feed speed V) is T1 ( sec), the deceleration time (time from the maximum feed speed V to the speed 0) is T2 (sec), and the constant speed feed time at the maximum feed speed V is t3. These L, V, T1, and T2 are registered in advance in the CPU 24. In FIG. 3, the area of the shaded area is the feed length L, and in FIG. 3A, the actual acceleration time is t1 and the actual deceleration time is t2.

Here, when L ≦ V (T1 + T2) / 2, the feed time t is expressed by the following equation.
t = √ {2L (T1 + T2) / V} (1)
When L> V (T1 + T2) / 2, the feed time t is expressed by the following equation.
t = L / V + (T1 + T2) / 2 (1 ′)
Thus, when the feed time t is obtained, the feed angle ψs (°) (rotation angle of the rotary cam) within the feed time t can also be calculated. Assuming that the maximum rotation speed of the press machine (rotary cam 20) is R (rpm), the time τ per rotation angle 1 ° is expressed by the following equation: τ = (60 / R) ÷ 360 = 1 / (6R) (Sec / °) (2)
It is assumed that R or τ is also registered in the CPU 24 in advance.

The rotation angle of the rotary cam per second is 1 / τ = 6R (° / sec). Therefore, the feed angle ψs is obtained by the following equation.
ψs = t / (6R) (3)
The feed angle ψs thus obtained is distributed symmetrically about the top dead center φ0 (0 °) of the rotary cam 20. Thus, the feed start angle φ5 (°), which is the rotation angle of the rotary cam at the start of the feed operation of the material 17, is obtained by the following equation.
φ5 = 360−ψs / 2 = 360−t / (12R) (4)
When the press machine rotates and the rotation angle of the rotary cam 20 becomes φ4, there is no possibility of interference between the mold and the material 17, and therefore the feed start permission signal d of the material 17 is output from the rotary cam 20. The delay rotation angle Δφ (°) and delay time ΔT (sec) from when the feed start permission signal d is output until the rotary cam 20 reaches the feed start angle φ5 can be obtained from the following equations.
Δφ = φ5-φ4 = 360−t / (12R) −φ4 (5)
ΔT = Δφ / (6R) = 60 / Rt / (72R ² ) −φ4 / (6R) (6)
The CPU 24 can detect the feed start angle φ5 by detecting the delay time ΔT determined by the equation (6) after the feed start permission signal d is issued. Therefore, the operation of this leveler feeder will be described in more detail with reference to FIGS.

  When the press machine rotates, the CPU 24 detects the feed start command signal d ', and the motor rotation command signal f' is sent to the feed motor servo amplifier 26, the feed of the material 17 starts. When the rotation angle of the rotary cam 20 reaches the top dead center φ0, a top dead center signal e is output. The press fixed position is confirmed by the top dead center signal e and used for various interlocks. Further, when the feed time t calculated from the formula (1) or the formula (1 ′) elapses, the feed of the material 17 is completed. At this time, the rotation angle of the rotary cam 20 is the feed completion angle φ6.

  As soon as the CPU 24 determines that the feeding of the material 17 has been completed, the CPU 24 sends a release opening command signal b ′ for releasing the work rolls 5 and 13 to the air cylinder 9 for work rolls to release and open the work rolls 5 and 13. To start.

  When the rotation angle of the rotary cam 20 becomes φ1 (120 °), the press interference signal a is output. By this time, if the CPU 24 detects that the feeding of the material 17 has not been completed, the feeding of the material 17 is suddenly stopped and an abnormal signal is sent to the press machine to generate an alarm.

  When the rotation angle of the rotary cam 20 becomes φ2, the pilot pin provided in the mold starts to pierce the material 17, and the release opening command signal b for releasing the feed rolls 14 and 15 is also output. 15 also begins to open. The feed rolls 14 and 15 and the work rolls 5 and 13 complete the release opening at the start of press working, that is, until the rotation angle of the rotary cam 20 becomes φ′2.

  When the rotation angle of the rotary cam 20 reaches the bottom dead center φπ and reaches φ′π, the pressing of the material 17 is completed, and a release closing command signal c is issued, and the feed rolls 14 and 15 and the work rolls 5, 13 starts the release closing operation at the same time.

  When the rotation angle of the rotary cam 20 becomes φ3, the pilot pin of the mold comes out of the material 17 and by this time, the feed rolls 14 and 15 complete the release closing operation and clamp the material 17.

  When the rotation angle of the rotary cam 20 becomes φ4, the interference between the mold and the material 17 is eliminated, and the feed start permission signal d is output. When the CPU 24 detects the elapse of the delay time ΔT calculated by the equation (6) from the time when the feed start permission signal d is received, the CPU 24 internally detects the feed start command signal d ′ and the motor rotation command signal f. 'Is sent to the feed motor servo amplifier 26 to start feeding the material 17. At this time, the rotation angle of the rotary cam 20 is the feed start angle φ5. The work rolls 5 and 13 have been released and closed until the rotation angle of the rotary cam 20 reaches the feed start angle φ5.

  When feeding of the material 17 is started and the feeding time t determined from the equation (1) or (1 ′) elapses, the feeding of the material 17 is completed, and the CPU 24 detects the completion of feeding of the material 17. At the same time, a release opening command signal b ′ is sent to the work roll air cylinder 9 to start releasing the work rolls 5 and 13. Thereafter, the leveler feeder repeats the above-described operation.

  In the above description, each of the signals a, b, c, d, and e has been described as being generated when the rotation angle of the rotary cam 20 is a predetermined value. However, the values can be appropriately changed back and forth.

  According to the present embodiment, the feed angle ψs that the rotary cam 20 rotates while feeding the material 17 to the press machine is distributed symmetrically to both the front and rear sides of the top dead center φ0, and the material 17 and a part of the press machine are arranged. Since the feed start angle φ5 larger than the angle φ4 at which the interference disappears is determined, the feed angle ψs can be made as small as possible, and the angles that can be used for release opening and release closing are equally allocated and the largest possible angle can be obtained. The work rolls 5 and 13 having poor responsiveness are released and opened from the time when the feeding of the material 17 is completed (rotation angle φ6 of the rotary cam 20) to the time when press working is started (rotation angle φ′2 of the rotary cam 20). Since the release is closed from when the press working is completed (rotation angle φ′π of the rotary cam 20) until the feed start angle (rotation angle φ5 of the rotary cam 20) is reached, the conventional pilot pin is stuck in the material. Compared to the case where the release opening is started at the beginning (rotation angle φ2 of the rotary cam 20) and the release closing is completed by the time the pilot pin is removed from the material 17 (rotation angle φ3 of the rotary cam 20). By increasing the rotation angle of the press machine being released, it is possible to secure a lot of time available for releasing the work rolls 5 and 13. As a result, the leveler feeder can increase the number of release follow-ups. In addition, this eliminates the need for special modification of the mechanical structure, and it is economical because all the software and electrical wiring are improved.

  By the way, the present invention is not limited to the embodiment described above, and various modifications can be made. For example, the present invention is applied to the press machine in the above embodiment, but the present invention can be widely applied to machine tools including a leveler feeder other than the press machine.

Moreover, in the said Example, although the rotary cam was used in order to detect the operating condition of a press, it is also possible to use an appropriate rotation angle detector, such as an encoder.
Furthermore, in the above-described embodiment, the timing for issuing the feed start command signal d ′ is determined by the CPU 24 by detecting the passage of the delay time ΔT from the feed start permission signal d. The feed start command signal d ′ may be output at a feed start angle φ5 obtained by adding the delay angle Δφ obtained from the equation (5) to the rotation angle φ4 of the rotary cam 20 at which the material 17 starts to interfere. The feed start permission signal d output from 20 may be used as a feed start command signal d ′ through a delay circuit.

  Furthermore, in the above-described embodiment, the rotation speed R of the press machine is set in advance, but the rotation speed of the press machine is determined from the time when the signals a, b, c, d, e from the rotary cam 20 are turned ON or OFF as appropriate. R may be calculated.

  Further, the rotation angle of the rotary cam 20 becomes φ4, and the CPU 24 receives the feed start permission signal d. At the same time, the CPU 24 detects the feed start command signal d ′ and sends the motor rotation command signal f ′ to the motor. It may be sent to the servo amplifier 26 to start feeding the material 17. Even in this case, for the work rolls 5 and 13 having poor responsiveness, the release opening is started when the feeding of the material 17 is completed, and the release closing is completed before the feeding of the material 17 is started. Compared to the case where the release opening is started when the pilot pin begins to pierce and the release closing is completed by the time the pilot pin is removed from the material 17, the rotation angle of the press machine within the time required for the release opening and closing is increased, and the leveler It is possible to increase the number of release follow-ups with almost no cost by changing the software without changing the feeder structure.

It is a block diagram of the release control apparatus of the leveler feeder which concerns on one Example of this invention. It is a figure explaining operation | movement of the said release control apparatus. It is a figure explaining the calculation method of the feed time of the material in the said leveler feeder. It is a figure explaining the structure of the conventional leveler feeder. It is a block diagram of the release control apparatus of the conventional leveler feeder. It is a figure explaining operation | movement of the release control apparatus of the conventional leveler feeder.

Explanation of symbols

5, 13 Work rolls 14, 15 Feed roll 17 Material 20 Rotary cam (Rotation angle detector)
ψs Feed angle φ0 Top dead center φ1 Rotary cam rotation angle φ2 where the mold and material start to interfere φ2 Rotary cam rotation angle φ′2 where the pilot pin begins to pierce the material Rotary cam rotation angle φπ Point φ'π Rotary cam rotation angle at press completion φ4 Rotary cam rotation angle at which the mold and material disappears φ5 Feed start angle φ6 Feed completion angle b Release release command signal for feed roll b 'Release for work roll Open command signal c Release close command signal d Feed start permission signal d 'Feed start command signal f, f' Motor rotation command signal

Claims (3)

In a release control device of a leveler feeder comprising a pair of feed rolls that sandwich a material and send it to a machine tool, and a pair of work rolls that sandwich the material and take a curl,
The feed roll starts to release after the pilot pin that fixes the position of the material starts to pierce the material, completes the release opening until the start of pressing the material, and the machine tool lowers the bottom dead center. After the press process is completed after passing through, the release closing is started, and the release closing is completed by the time when the pilot pin comes out of the material,
The work roll starts to open after the material feed is completed, and completes the release opening by the start of pressing the material, and the machine tool passes through the bottom dead center to complete the pressing. A release control device for a leveler feeder which starts release closing later and completes the release closing by the start of feeding of the material. In a release control device of a leveler feeder comprising a pair of feed rolls that sandwich a material and send it to a machine tool, and a pair of work rolls that sandwich the material and take a curl,
While the material is being sent to the machine tool, the feed angle at which the machine tool rotates is distributed symmetrically to both the front and rear sides of top dead center, and the feed angle is greater than the angle at which interference between the material and a part of the machine tool is eliminated. Determine the starting angle,
The work roll is released and opened from the time when the feeding of the material is completed to the time when pressing is started, and from the time when the machine tool passes the bottom dead center and completes pressing until the feed starting angle is reached. A release control device for a leveler feeder characterized by performing release closing.   The feed start angle is determined by detecting the angle at which the rotation angle detector eliminates the interference between the material and a part of the machine tool and outputting the feed start permission signal, and then feeding the feed length, feed speed, and acceleration of the material. The release of the leveler feeder according to claim 2, wherein the leveler feeder is detected by a delay time determined from a feed time calculated from a time and a deceleration time, a rotation speed of the machine tool, and an angle at which the interference is eliminated. Control device.

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