JP2019038053A - Material supply method and material supply system - Google Patents

Abstract

To provide a material supply method or the like which can easily prevent contamination of an undersized product by a method different from conventional methods, and does not require setting of a setting value of delivery shortage according to processing length for each product.SOLUTION: A material supply method delivers material B1 to a process machine side, thereafter pushes back the material B1 to supply the material B1 into a process machine 1 by a constant delivery amount. The material supply method detects whether the material B1 is pushed back, and determines as abnormality of a delivery amount of the material B1 when the material B1 is not pushed back.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a material supply method and the like capable of determining a shortage of material delivered by a material feeder.

  Conventionally, a material processing apparatus for processing a material such as a bar is known. This type of material processing apparatus includes a material supply machine that supplies and supplies a material to a processing machine, and a processing machine such as a lathe that processes the supplied material.

  As an example, the material supply machine includes a feed rod that moves along the main axis of the processing machine by a drive source such as a motor. (See Patent Document 1 and Patent Document 2).

  The material delivery amount is set, for example, at the position of a stopper provided on the processing machine side, and the material supply machine delivers the material until the leading end of the material comes into contact with the stopper. Further, the processing machine cuts the material supplied by the material supply machine with a cutting tool, and then cuts the material with a parting tool.

Japanese Patent No. 3378366 Japanese Patent No. 3740210

  By the way, this kind of material supply machine detects the amount of material sent to the processing machine side in order to prevent mixing of incomplete processed products, and compares this delivery amount with the set value of insufficient delivery. The presence / absence of a delivery failure is determined. If it is determined that the delivery failure has occurred, the processing of the material by the processing machine is stopped.

  In the conventional material feeder described above, for example, in order to detect the feed amount of the feed rod, the feed amount of the material needs to be set according to the processing length for each product.

  Therefore, the present invention has been made with the above problem as an example of the problem, and it is a first object to provide a material supply method and the like that can easily prevent the mixing of insignificant products by a method different from the conventional one. The second object of the present invention is to provide a material supply method and the like that do not require the setting value of insufficient delivery according to the processing length for each product.

  In order to solve the above-described problem, the material supply method according to claim 1 is characterized in that after the material (B1) is sent to the processing machine side, the material is pushed back and the material is sent to the processing machine (1) at a constant delivery amount. The material supply method is to detect whether or not the material is pushed back, and when the material is not pushed back, it is determined that the delivery amount of the material is abnormal.

  Further, the material supply system according to claim 2 is provided with a delivery means (30) for delivering the material to the processing machine side, and a push-back means (20) for pushing back the delivered material. A material supply system (100) for pushing back the material and supplying the material to a processing machine at a constant delivery amount, the detection means (38) for detecting the amount of the material pushed back, and the detected pushing force. And determining means (52) for determining whether or not the material is pushed back based on a return amount, and for determining that the material delivery amount is abnormal when the material is not pushed back. And

  Further, the material supply system according to claim 3 is the material supply system according to claim 2, wherein the determination unit is configured to detect the material when the amount of pushback detected by the detection unit is smaller than a predetermined threshold. It is characterized that it is determined that there is an abnormality in the delivery amount of.

  According to a fourth aspect of the present invention, in the material supply system according to the second or third aspect, the processing of the material is stopped when it is determined that the delivery amount of the material is abnormal. It is characterized by that.

  According to the present invention, after the material is sent to the processing machine side, the material delivery failure is judged before the material is processed by the amount of the material pushed back, so that it is possible to easily prevent the product from being mixed. it can.

  In addition, since the material delivery failure is determined when the material retraction amount is less than the predetermined threshold value, it is not necessary to set a setting value for insufficient delivery according to the processing length for each product.

It is the schematic of a material processing apparatus. It is a schematic block diagram of a material processing apparatus. It is a control block diagram of a material processing apparatus. It is a block diagram which shows the operation example of a material processing apparatus. It is a flowchart figure which shows the operation example of a material processing apparatus. It is a block diagram which shows the 2nd operation example of a material processing apparatus. It is a block diagram which shows the 3rd operation example of a material processing apparatus.

  Hereinafter, embodiments of the present application will be described with reference to the accompanying drawings. In the following description of the material processing apparatus 100, for the sake of convenience, the left-right direction shown in FIG.

  As shown in FIG. 1, a material processing apparatus 100 (material supply system of the present application) is disposed adjacent to a processing machine 1 such as a lathe for processing a bar B1 as a processing material, and adjacent to the processing machine 1. And a material supply machine 2 for supplying the bar B1 to the processing machine 1.

  As shown in FIGS. 1 and 2, the processing machine 1 includes a cylindrical main shaft 11 through which a bar B1 can pass, a chuck 12 attached to the main shaft 11 and gripping the bar B1, and a bar B1. A cutting tool and a cutting tool (not shown) for cutting are provided. The chuck 12 rotates together with the main shaft 11 and can rotate about the main axis A1.

  The bar B1 is gripped by the chuck 12 and rotated along with the rotation of the main shaft 11 during cutting with the cutting tool.

  Further, the processing machine 1 has a stopper 20 that pushes back the bar B1 sent out by the material supply machine 2 to the tip position of the bar B1 necessary for product processing (hereinafter referred to as “origin position X”). Push-back means) is provided. The origin position X is set according to the machining length for each product.

  For example, the stopper 20 is disposed concentrically with the main shaft 11 of the processing machine 1 and is driven so as to reciprocate along the main axis A1 and a contact portion 22 that contacts the tip end of the bar B1. And a drive source 23 such as a motor attached to the contact portion 22 via a support (not shown). In the present embodiment, an example in which the stopper 20 is arranged alone is shown, but the stopper 20 may be attached to a turret provided in the processing machine 1 such as a lathe. In this case, the turret may be moved directly to push the material B1 back to the material feeder 2 side.

  In the initial state, the contact portion 22 of the stopper 20 of the present embodiment is positioned at a bar feed position Y far from the origin position X with respect to the material supply machine 2 in the initial state. After the bar B1 is sent out from the material feeder 2, the bar B1 is pushed back to the material feeder 2 side by driving the drive source 23 as shown in FIG. Moved. The position of the contact portion 22 of the stopper 20 is appropriately set by a control execution program of the control device 50 described later. Further, the bar feed position Y of the present embodiment is set farther than the origin position X at least with respect to the material feeder 2.

  Next, as shown in FIG. 2, the material supply machine 2 receives the bar B1 from the shelf that accommodates the bar B1 and the main axis A1 (not shown), and receives the bar B1 from the shelf on the main axis A1. And a conveying device 30 for conveying (the sending means of the present application).

  The transport device 30 includes a feed rod 31 centered on the main axis A1 of the main shaft 11, a moving mechanism unit 40 for moving the feed rod 31 along the main axis A1, and the feed rod 31 via the moving mechanism unit 40. And a drive source 32 such as a motor to be driven.

  The feed rod 31 is guided by a guide rail fixed on a main body frame (not shown) so as to be able to reciprocate in the front-rear direction, and transmits the driving force from the driving source 32 to the feed rod 31, thereby causing the feed rod 31 to move to the main axis. It is movable along A1, and the bar B1 is supplied to the processing machine 1 with a constant delivery amount.

  The feed rod 31 includes a shaft 31b extending along the main axis A1, and a finger chuck 31a capable of gripping the rear end of the bar B1 is attached to the tip of the feed rod 31. The bar supplied from the shelf onto the main axis A1 The rear end of the material B1 is gripped by the finger chuck 31a.

  The moving mechanism unit 40 includes a slider 33 attached to the rear portion of the feed rod 31 and a drive mechanism unit 41 that drives the slider 33 in the front-rear direction.

  The drive mechanism unit 41 includes a drive chain 35 to which the slider 33 is attached, and a drive sprocket 36 and a driven sprocket 37 on which the drive chain 35 is bridged. The drive mechanism unit 41 transmits drive to the drive sprocket 36. A drive source 32 such as a motor connected via a mechanism 42 is connected.

  Then, the motor (drive source 32) is driven, the drive sprocket 36 is rotated via the drive transmission mechanism 42, the drive chain 35 is rotated in cooperation with the driven sprocket 37, and the slide 33 is caused to travel in the front-rear direction. .

  The drive transmission mechanism 42 includes, for example, a pair of pulleys 32 a and a drive belt 39, and transmits the drive force from the drive source 32 to the drive sprocket 36.

  Further, a rotary encoder 38 (detection means of the present application) connected so as to rotate in synchronization with the drive sprocket 36 is attached to the shaft of the drive sprocket 36. The amount of movement, that is, the amount of feed of the bar B1 is detected. The rotary encoder 38 may be attached to the driven sprocket 37.

  The rotary encoder 38 outputs a predetermined number of pulse signals in accordance with the rotational angular displacement of the drive sprocket 36, and the processing machine controller 51 described later counts the pulse signals to determine the conveying amount of the bar. calculate. The count function of the rotary encoder 38 may be referred to as a “counter” in the following description.

  The drive mechanism 41 and the drive transmission mechanism 42 are not particularly limited to the configuration of the present embodiment, and generally known mechanisms can be used. Specifically, the drive chain 35 and the drive belt 39 may be various generally known belts and chains. In this embodiment, the pulley is used as the transmission, but a gear train transmission mechanism or the like may be used, and the drive sprocket 36 may be directly driven by the drive source 32.

  Further, as shown in FIG. 3, the material processing apparatus 100 includes a control device 50 that controls the processing machine 1 and the material supply machine 2. The control device 50 is provided in the processing machine control unit 51 for controlling each component member such as the chuck 12 provided in the processing machine 1, a cutting tool 14 such as a cutting or parting tool, and a drive source 23, and the material supply machine 2. And a material supply controller 52 for controlling each component such as the drive source 32 and the rotary encoder 38. The processing machine control unit 51 and the material supply machine control unit 52 can communicate with each other by wire or wirelessly.

  The processing machine control unit 51 and the material supply machine control unit 52 include a CPU, a RAM, a ROM, and the like. The ROM stores a control execution program, and the CPU is executed according to the control program. The RAM temporarily stores data necessary for control. The origin position X and the bar feed position Y are appropriately set based on the processing length of the product.

  Then, for example, the processing machine control unit 51 issues a command for opening / closing the chuck 12, moving the stopper 20, and moving the cutting tool 14 such as cutting or parting tool. On the other hand, the material feeder controller 52 issues a command regarding the operation of the drive source 32 and the rotary encoder 38. Further, the pulse signal of the rotary encoder 38 is counted (counted), and whether or not the bar B1 is insufficiently fed (abnormal) is determined based on the counted information (measured value).

  Next, an operation example of the material processing apparatus 100 will be described with reference to FIGS. Note that the material processing apparatus 100 according to the present embodiment sends the bar B1 at a constant rate by sending the bar B1 for processing beyond a specified length (origin position X) and then pushing back the bar B1. After the amount is supplied to the processing machine 1, the bar B1 is processed. Further, the bar feed position Y of the present embodiment is appropriately set farther from the origin position X defined for each product, and the tip position of the bar B1 that moves by the feed of the bar B1 is positioned.

  First, in a state where the processing machine 1 and the material supply machine 2 can be operated, a driving source (not shown) is operated to supply the bar B1 from the shelf to the conveying device 30 (see FIG. 2), and then the driving source 23 is driven. As shown in FIG. 4A, the contact portion 22 of the stopper 20 is moved and positioned at the bar feed position Y (step S101).

  Next, the chuck 12 of the processing machine 1 is opened (step S102), and the bar B1 can be inserted into the main shaft 11.

  Next, the counter of the rotary encoder 38 is started, the drive source 32 is driven, the drive sprocket 36 is rotated, and the slider 33 is moved toward the processing machine 1 side by the drive chain 35, as shown in FIG. As shown, the bar B1 is sent out to the processing machine 1 side (step S103). Note that the rear end of the bar B1 is gripped by a finger chuck 31a included in the feed rod 31 connected to the slider 33.

  Further, by this operation, the bar B1 is moved until the tip end portion thereof is positioned at the bar feed position Y. At this time, the tip of the bar B1 comes into contact with the contact portion 22 of the stopper 20.

  Next, the stop of the feed rod 31 is confirmed by the stop of the rotary encoder 38. When it is confirmed that the feed rod 31 is stopped, the pulse signal output from the rotary encoder 38 is measured, and a measured value C indicating the movement position of the feed rod 31 is acquired (step S104). If the stop of the feed rod 31 cannot be confirmed, the process waits until the stop of the rotary encoder 38 is confirmed.

  Next, the drive source 23 is driven, and as shown in FIGS. 4B and 4C, the contact portion 22 of the stopper 20 is retracted, and the bar B1 is moved toward the material feeder 2 side. Then, the contact portion 22 of the stopper 20 is positioned at the origin position X (step S105).

  Next, the stop of the feed rod 31 is confirmed. When it is confirmed that the feed rod 31 has stopped, the pulse signal output from the rotary encoder 38 is measured, and the measured value D indicating the movement position of the feed rod 31 is acquired (step S106). If the stop of the feed rod 31 cannot be confirmed, the process waits until the stop is confirmed.

  Next, it is determined whether or not the retraction amount S of the bar B1 measured based on the measurement values C and D of the pulse signal output from the rotary encoder 38 is equal to or greater than a predetermined threshold Z (step S107). . As a result, if the retraction amount S is smaller than the threshold value Z, it is determined that the feeding is abnormal with respect to the feeding of the bar B1, and if it is not less than the threshold value, it is determined that the feeding of the bar B1 is normal.

  If it is determined that the delivery is abnormal, the operation of the material processing apparatus 100 is stopped (step S108), and the process is terminated.

  On the other hand, if it is determined to be normal, the chuck 12 of the processing machine 1 is closed and the measured value of the pulse signal output from the rotary encoder 38 is reset as shown in FIG. 4D (step S109). ) Cutting is started (step S110).

  Next, after confirming the end of processing, the feed rod 31 is returned to the initial position, and the process returns to step S101 to continue the processing.

  As described above, the material processing apparatus of the present embodiment includes the feed rod 31 that sends the bar B1 to the processing machine side, and the stopper 20 that pushes back the sent bar B1, and sends the bar B1 after feeding it. The bar B1 is pushed back by the stopper 20 to supply the bar B1 to the processing machine 1 at a constant feed amount. The rotary encoder 38 detects the pushback amount of the bar B1, and the detected push When the return amount is smaller than the threshold value, it is determined that the bar B1 is delivered abnormally, and the bar processing is stopped.

  Therefore, before cutting, it is possible to detect an abnormal feeding of the bar B1 and easily prevent mixing of products that are not short. Also, since it is determined that the material delivery is normal by checking the movement of the material above the set threshold, it is not necessary to set a threshold according to the processing length for each product, and multiple types of processed products Can reduce setting man-hours and setting time.

  Next, a second operation example of the material processing apparatus will be described with reference to FIG. Note that the operation of the material processing apparatus 100 of the present embodiment is the same as the operation example shown in FIG. FIG. 6 shows an operation example when the fed bar B1 does not contact the stopper.

  For example, as shown in FIG. 6B, the material processing apparatus 100 according to the present embodiment is a case where the bar B1 is not sent to the bar feed position Y for some reason, and the bar B1 is not properly delivered. Even if it exists, if the bar B1 is sent to the push-back range (between XY) of the stopper 20, as shown in FIG. 6C, the tip of the bar B1 is moved to the origin by the movement of the stopper 20. Since it is positioned at the position X, as shown in FIG. 6D, the chuck 12 can be closed and the processing of the bar B1 can be started.

  Accordingly, the feed amount of the bar B1 is set as appropriate as long as at least the tip of the bar B1 exceeds the origin position X, and the bar feed position Y is determined by the transport device 30. It may be set regardless of the transmission amount of B1.

  That is, the tip of the bar B1 does not necessarily need to be in contact with the contact portion 22 of the stopper 20 positioned at the bar feed position Y.

  Next, a third operation example of the material processing apparatus 100 will be described with reference to FIG. Note that the operation of the material processing apparatus 100 of the present embodiment is the same as the operation example shown in FIG. FIG. 7 shows an operation example when the fed bar B1 does not come into contact with the stopper. For some reason, as shown in FIG. 7B, the tip of the bar B1 fed by the conveying device 30 is shown. This is an example of operation in the case where is not sent to the origin position X.

  As shown in FIG. 7C, the material processing apparatus 100 according to the present embodiment pushes back the contact portion 22 of the stopper 20 and positions it at the origin position X after performing the feeding operation of the bar B1. The contact part 22 does not contact the bar B1. And when the processing by the processing machine 1 is performed as it is, it becomes an incomplete product and a product defect occurs.

  Therefore, in order to prevent such product defects, the material processing apparatus 100 of the present embodiment is measured based on the measured values C and D of the pulse signal output from the rotary encoder 38 in step S107 shown in FIG. In addition to determining whether or not the retraction amount S of the bar B1 is greater than a predetermined threshold, it is determined whether or not the retraction amount S of the bar B1 is 0. Even in the case where the bar B1 is not pushed back, it is preferable to determine that the bar B1 is fed abnormally.

  Thus, by determining whether or not at least the bar B1 has moved based on the measured value of the pulse signal output from the rotary encoder 38, before the cutting process is performed, the bar B1 is insufficiently delivered (delivery abnormality). ) Can be detected, so that it is possible to easily prevent the mixing of a short product.

  In addition, this application is not limited to this embodiment, It can implement in a various form. For example, in the present embodiment, the amount of movement of the bar, the origin position X, or the bar feed position Y can be detected by the rotary encoder 38, but a mechanical limit switch or the like may be used, and their detection means A known member may be used.

  In this embodiment, a cylindrical bar is applied as the processing material, but the present invention is not limited to the bar, and the cross section is an elliptical, polygonal, or hollow member. It doesn't matter.

B1 Material 1 Processing machine 2 Material supply machine 20 Stopper 30 Conveying device 38 Rotary encoder 52 Control unit 100 for material supply machine Material processing device

Claims (4)

After feeding the material to the processing machine side, the material is fed back and the material is supplied to the processing machine at a constant delivery amount.
It is detected whether or not the material is pushed back, and when the material is not pushed back, it is determined that the delivery amount of the material is abnormal. A feeding unit that feeds the material to the processing machine; and a push-back unit that pushes back the delivered material. A material supply system,
Detecting means for detecting the amount of pushing back of the material before processing the material;
Determining means for determining whether or not the material has been pushed back based on the detected pushback amount, and determining that the material delivery amount is abnormal when the material is not pushed back;
A material supply system comprising:   3. The material supply system according to claim 2, wherein the determination unit determines that the material delivery amount is abnormal when the amount of pushback detected by the detection unit is smaller than a predetermined threshold value.   4. The material supply system according to claim 2, wherein processing of the material is stopped when it is determined that the amount of the material delivered is abnormal.

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