JPH0537444U - Bar processing equipment - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] Bar feed processing that can monitor the feed error of the bar during processing feed and shorten the remaining length of the bar, which can be achieved with an inexpensive structure Provide the device. [Structure] The bar material feeder 1 of the bar material processing device is provided with an encoder 18 for constantly detecting the amount of advance of the bar material W, and an output Sa of the encoder 18 is supplied to a controller 25 of the bar material processing machine 2. It is entered directly. The controller 25
An operation control unit that controls the operation of each drive mechanism of the bar processing machine 2, a processing program storage unit that stores a plurality of selectable processing programs, and a processing program to be executed is selected based on the detection result of the encoder 18. And a machining program selection control unit for performing the same. This machining program selection control unit, based on the detection result of the encoder 18,
Detecting the remaining machining length LR of the
Select a program to machine to the end and feed arrow 1 based on the detection result of encoder 18.
It determines the abnormality of the machining feed according to 3, and instructs the alarm device to issue an abnormality alarm.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bar processing apparatus, and more particularly, to a bar processing apparatus that can process a bar without waste and can constantly monitor a bar feed abnormality with a simple configuration.

[0002]

[Prior Art]

 A bar processing machine such as an NC lathe that cuts a bar based on a preset program is widely put into practical use. In addition, an automatic rod configured to automatically advance a relatively long bar to the bar processing machine by advancing the bar sequentially following the cutting process by the bar processing machine. A material feeder is known. Such a bar material processing machine and a bar material supplying machine are generally used in a state of being combined with each other, and constitute a bar material processing apparatus as a whole.

In such a bar processing apparatus, it is difficult to completely cut the end of the bar, and a residual material of a certain length is left at the end of the bar processing. Such residual material can no longer be automatically processed by the bar processing device and is discarded by disposal or the like. In order to reduce such waste materials, efforts have been made for a long time to perform cutting work to the end of the bar.

It is assumed that a plurality of rods having the same standard length are constantly replenished to the rod processing apparatus, and the rod feeder automatically and sequentially supplies each of these rods to the rod processing machine. For example, each machining length of the bar is appropriately allocated in advance so that efficient machining can be performed over the entire length of the bar, and multiple product machining programs of the bar machining machine are combined in advance according to this allocation. In this way, it is theoretically possible to cut the bar material over substantially the entire length. However, in practice, since there is a considerable product error in the total length of the standard length bar, it is difficult to practically adopt such a method. Moreover, in the actual product processing, so-called random materials in which different-sized bars are mixed are often replenished to the bar feeder. When processing such a random material, the above method cannot be adopted at all.

In this type of bar processing apparatus, based on the position detection means for detecting the position of the feed arrow and the position of the feed arrow detected by the position detection means, a processing program according to the length of the remaining material is performed. It has been proposed that the device is configured to select (Japanese Utility Model Publication No. 3-9921). When this bar processing device detects that the bar has shortened to the specified length by detecting the forward movement of the feed arrow, it selects the processing program for executing the subsequent processing steps, and , Try to process the bar material to the end without waste.

Further, in the bar material processing apparatus, the bar material feeder needs to accurately advance the bar material by a predetermined distance according to the processing amount required by the bar material processing machine. Such advancement of the bar material is performed, for example, by the bar material feeder constantly applying a predetermined propulsive force to the bar material, and the bar material stopping mechanism of the lathe prevents or permits the advancement of the front end portion of the bar material. It However, if the bar does not advance as desired during the machining of the bar, the product processed by the bar processing machine may have a defective length or the product itself cannot be processed. It In order to avoid such a situation, the applicant of the present invention has proposed a bar material feeder equipped with a feed arrow constant amount movement confirmation device for confirming that a normal machining feed has been performed (Japanese Patent Laid-Open Publication No. Sho. 62-130104). This movement confirmation device requires a rotary encoder that detects the amount of movement of the feed arrow for advancing the bar, a counter that counts the output (pulse signal) of the rotary encoder, and a count value of the counter and machining feed. And an electrical circuit configured to compare the time with. This movement confirmation device does not use contact type sensors, such as limit switches, which are prone to failure, and can always monitor the movement of the feed arrow during machining feed. It is superior to the device.

[0007]

[Issues to be solved by the device]

 However, in the above-described bar material processing apparatus including the position detection means for detecting the position of the feed arrow and the processing program selection means, it is not possible to constantly monitor the bar material feed abnormality with a simple configuration. Further, in the bar processing apparatus equipped with the movement confirmation device, since it is necessary to provide a controller having a relatively complicated electric circuit that constitutes the movement confirmation device, the price of the bar feeder and, by extension, There is a tendency to increase the price of the entire bar processing equipment. Also, with a bar material feeder equipped with such a movement confirmation device, it is possible to monitor processing feed abnormalities due to damage or malfunction of the above stop mechanism, poor gripping of the collet chuck, etc. It is not possible to control the machining process so as to efficiently reduce the machining cost.

The present invention has been made in view of the above points, and an object of the present invention is to shorten the remaining length of a bar material as much as possible and constantly monitor the feed error of the bar material during the machining feed. It is another object of the present invention to provide a bar material processing device which can be achieved with an inexpensive structure.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a bar processing machine that performs a turning process on a bar according to a processing program, and supplies the bar to the bar processing machine for each predetermined processing length. In the bar processing apparatus having a machine, the bar feeder supplies a bar feed member for advancing the bar, a drive device for driving the bar feed member, and a movement amount of the bar feed member. The bar processing machine has a movement amount detecting device for constantly detecting, and the bar processing machine stores an operation control section for controlling each drive mechanism of the bar processing machine according to a processing program and a plurality of selectable machining programs. It has a control device including a program storage unit and a machining program selection control unit to which the detection result of the movement amount detection device is input, and the machining program is capable of machining bars having different lengths. Can include multiple processing programs, The machining program selection control unit calculates the remaining length of the bar based on the detection result of the movement amount detection device, and performs appropriate machining according to the remaining length of the bar so as to machine up to the end of the bar. A program is selected, the operation control unit controls the drive mechanism to process the bar based on the selected processing program, and the processing program control unit further detects the movement amount detection device. Based on the result, there is provided a bar processing apparatus characterized by determining an abnormality in the machining feed by the feed arrow and instructing an alarm device to issue an abnormality alarm.

According to the bar processing apparatus having the above-described configuration, the movement amount detection device provided in the bar material feeder constantly detects the movement amount of the bar material feeding member, and the detection result is the result of the bar material processing machine. It is input to the program selection control unit of the control means. The program selection control unit calculates the remaining length of the bar based on this detection result, and selects an appropriate machining program that can perform machining to the end of the bar as much as possible. The operation control unit controls each drive mechanism of the bar processing machine based on the selected processing program. Therefore, the above-mentioned bar processing apparatus appropriately combines a plurality of processing programs so as to efficiently process the bar while detecting the remaining length of the bar, regardless of the initial length of the bar. Processing can be performed over substantially the entire length of the material.

Further, the detection result of the movement amount detection device is constantly input to the program selection control unit, and the control device of the bar material processing machine constantly monitors the movement amount of the bar material feeding member to perform the machining feed of the feed arrow. When an abnormality occurs, an alarm device provided in the control device itself can be instructed to issue an alarm, or another monitoring device can be instructed to operate the alarm device. Thus, the user of the bar processing apparatus can easily know the feed error of the bar.

In a preferred embodiment of the present invention, the drive device for the bar processing machine has an electric motor, and the movement amount detection device detects a rotation amount of an output shaft of an electric motor. The rotary encoder has a tally encoder, and the output of the rotary encoder is directly input to the machining program selection control unit of the control device. According to this structure, the remaining length of the bar can be monitored with an extremely simple structure.

[0013]

【Example】

 Hereinafter, preferred embodiments of a bar processing apparatus according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic plan view of a bar processing apparatus according to an embodiment of the present invention. As shown in FIG. 1, the bar processing apparatus is composed of a bar feeder 1 and a bar processing machine 2.

The bar material feeder 1 includes a main body frame 11 and a material shelf 12 arranged on a side portion of the main body frame 11. The material shelf 12 has a plurality of shelf members 12a capable of supporting a predetermined number of bars W to be supplied. The shelf members 12a are arranged at a predetermined interval in the longitudinal direction of the bar feeder 1, and project laterally from the body frame 11. Although a plurality of rods W can be placed side by side on the material rack 12 in FIG. 1, only one rod W is placed on the material rack 12 in order to simplify the drawing in FIG. The state of being placed is shown.

The bar material feeder 1 also includes a feed arrow 13 for supplying the bar material W to the bar material processing machine 2. The feed arrow 13 is supported by a guide 11a provided on the body frame 11 so as to be reciprocally movable in the front-rear direction on the machining axis XX of the bar W. A finger chuck 13a for gripping the rear end of the bar W is rotatably attached to the front end of the feeding arrow 13. FIG. 1 shows a state in which the bar W is gripped by the finger chuck 13a and the front end portion of the bar W is inserted into the main shaft 21 of the bar processing machine 2.

In order to move the feed arrow 13 forward, the endless chain 14 is locked to the rear end portion 13 b of the feed arrow 13. A driven sprocket 15 and a drive sprocket 16 are supported on the front end and the rear end of the body frame 11, respectively, and the chain 14 is wound around these sprockets 15, 16. The driven sprocket 15 is rotatably supported on the front end of the main body frame 11, while the drive sprocket 16 is connected to the output shaft of the drive motor 17 via an electromagnetic clutch or the like (not shown). The drive motor 17 applies a drive torque to the chain 14 via the drive sprocket 16 to drive the chain 14 to travel.

The bar processing machine 2 is an NC lathe of a main shaft moving type, and has a main shaft 21 which can reciprocate along a processing axis line XX. The main shaft 21 includes a collet chuck 22 for gripping the rod W, and imparts a rotational force to the rod W gripped by the collet chuck 22. A cutting tool 24 for cutting the bar W is arranged in front of the main shaft 21. The cutting tool 24 is supported by a tool holder (not shown), and is moved by the movement of the tool holder so as to approach or separate from the machining axis X--X. FIG. 1 shows a state in which the cutting tool 24 is retracted from the machining axis line XX.

In such a bar processing apparatus, when the bar W is processed and fed, first, the stopper 27 is brought into contact with the tip of the bar W so as to prevent the bar W from advancing, and the main shaft 21 of the main shaft 21 moves. The collet chuck 22 is opened. Then, the main shaft 21 is retracted, the collet chuck 22 is closed, and the bar W is gripped. When the stopper 27 is moved to the retracted position, the spindle 21 is advanced by a predetermined amount. The electric motor 17 of the bar feeder 1 constantly applies a predetermined forward torque to the chain 14 so that the feed arrow 13 always pushes the bar W forward. The rod W smoothly advances as the main shaft 21 advances. When the processing feed is completed in this way, the bar processing machine 2 rotates the bar W by the main shaft 21 while cutting the bar W by the cutting tool 24.

When the bar material processing machine 2 cannot control the advance of the bar material W as desired due to breakage of the stopper 27, malfunction of the bar material processing machine 2 or the like during such processing feeding, the bar material W is a predetermined value. Will advance beyond the amount of advance. Therefore, a device for monitoring such a feed abnormality of the bar W is required. Further, when such processing feed and cutting are performed up to near the end of the bar W, the processing for the bar W is completed and the residual material gripped at the tip of the finger chuck 13a is discharged. It is desirable to shorten the length of the residual material as much as possible. In the present embodiment, such a feed abnormality is monitored, and a rotary encoder (hereinafter simply referred to as an encoder) for constantly detecting the amount of advance of the bar W in order to cut the end of the bar W as much as possible. 18) is provided.

The encoder 18 is arranged so as to detect the rotation of the rotary shaft of the electric motor 17, and the output Sa of the encoder 18 is directly input to the controller 25 of the bar processing machine 2. The controller 25 is generally for controlling the operation of the spindle 21 and the cutting tool 24, and provides predetermined operation control signals Sb, Sc, to the respective drive mechanisms of the tool holder of the spindle 21 and the cutting tool 24 and the stopper 27. Equipped with an operation control unit that outputs Sd respectively. The controller 25 also includes a machining program storage unit that stores a plurality of selectable machining programs, and a machining program selection control unit (hereinafter simply referred to as a control unit) that selects these machining programs based on the detection result of the encoder 18. ) And.

FIG. 2 and FIG. 3 are flowcharts showing a mode of processing control executed by the controller 25. The control of the controller 25 starts when the unprocessed bar material W, that is, a new material, is fed from the material rack 12 of the bar material feeder 1 in front of the feed arrow 13. Based on the output Sa, the controller of the controller 25 determines the position of the feed arrow 13 when the finger chuck 13a of the feed arrow 13 grips the rear end of the bar W, that is, the initial position Y0 of the feed arrow 13. It is detected (S1). The control unit further detects the initial forward movement of the feed arrow 13, and detects the position Y1 of the feed arrow 13 when the feed arrow 13 is stationary for at least 3 seconds (S2, S3, S4). At the position Y1, the feed arrow 13 advances the bar W until the front end of the unprocessed bar W contacts the stopper 27 as shown in FIG. If the feed arrow 13 does not move forward or moves forward beyond a predetermined initial amount of forward movement, the alarm device of the controller 25 is instructed to issue an alarm (S5, S6).

Next, the control unit of the controller 25 subtracts the length A of the feed arrow 13 from the distance L between the stopper 27 and the rear end of the feed arrow 13 determined based on the output Sa of the encoder 18. Thus, the length LM of the bar W is calculated (S7). If the length LM of the bar W is already smaller than the length P1 that can be machined by the first machining program which is the desired machining program, the controller 25 determines that the bar W having an abnormally short length is An alarm is issued as if it was supplied (S8, S9).

Subsequently, the control unit selects the first processing program to process a desired product (S10), and the operation control unit of the controller 25 retracts the stopper 27 and grips the bar W. The collet chuck 22 is closed, and the spindle 21 is further advanced. Along with this, the feed arrow 13 and the bar W are advanced by a predetermined feed amount (S11). When the feed arrow 13 stops and remains stationary for at least 3 seconds, the control unit detects the position Y2 of the feed arrow 13 based on the output Sa of the encoder 18 (S12, S13). Next, the control unit calculates the difference between the initial position Y1 and the position Y2 after the machining feed, that is, the distance between the two positions (S14). As a result of the calculation, if the length X within the predetermined range cannot be obtained, an alarm is issued as if the machining feed is abnormal (S15, 16). The control unit further subtracts the length X from the length LM, and stores this as the unprocessed length LR of the bar W (S17).

Subsequently, the operation control unit commands the main spindle 21 and the bit 24 to perform a predetermined cutting operation based on the first processing program (S18), one product is processed, and this is processed by the bar W. After cutting off from the front end portion, the remaining machining length LR is compared with the length P1. Since the length LM of the unprocessed bar W is generally sufficient to process the desired product multiple times, the control and actuation controls typically rely on the stopper 27 and the spindle 21. Forward movement of the bar W (S11, S12), detection of the position Y2 of the feed arrow 13 (S13), calculation and storage of the remaining machining length LR of the bar (S14 to S17), and machining of a product of length p1 ( Each step of S18) is repeatedly executed (S19). As the operation of the controller 25 is repeated, the processed material length LR of the bar W is gradually shortened.

When the remaining machining length LR is reduced to a length that can no longer be machined by the first machining program, the control unit can machine the bar W having the material length P2 smaller than the material length P1 of the first machining program. Two programs are selected (S20, S21), the controller 25 controls each drive mechanism of the bar processing machine 2 according to the second processing program, and the bar processing machine 2 processes a product having a material length p2. If the remaining machining length LR is smaller than the material length P2 and larger than the material length P3 that can be machined by the third machining program, the control unit selects the third machining program (S22, S23) and The material processing machine 2 processes the bar material W in accordance with the third processing program. When the bar material W is shortened to a length that cannot be machined by the third machining program, the control unit commands the operation control unit to execute the remaining material discharge operation (S24), and the operation control unit causes the predetermined discharge operation. Instruct each drive mechanism to operate. Thus, the processing for one bar W is completed, and the controller 25 ends the above series of controls.

As described above, the bar material feeder 1 includes the encoder 18 for constantly detecting the amount of advance of the bar material W, and the output Sa of the encoder 18 is the controller 25 of the bar material processing machine 2. Is entered directly into. The controller 25 controls an operation control unit that controls the operation of each drive mechanism of the bar processing machine 2 according to a machining program, a machining program storage unit that stores a plurality of selectable machining programs, and a machining program to be executed. And a control unit that makes a selection based on the detection result of the encoder 18. This control unit detects the machining residual length LR of the bar W based on the detection result of the encoder 18, and based on this machining residual length LR, particularly in the final stage of machining, An appropriate program is selected so that the bar W can be processed to the end. Therefore, in the bar material processing apparatus including the bar material feeder 1 and the bar material processing machine 2, regardless of the material length of the unprocessed bar material W, it is possible to machine up to substantially the end of the bar material W. As a result, the length of the waste material to be discarded can be surely reduced.

Further, since the controller 25 can always detect the position of the feed arrow 13 by the encoder 18, the bar processing apparatus relatively easily detects the feed error of the bar W during the processing feed, and detects this. The alarm of the controller 25 can inform the user. Moreover, in the bar processing device 1, the generally large-capacity controller 25 provided in the bar processing machine 2 is used to detect the remaining bar length and the abnormal feed. Therefore, according to this configuration, by remodeling the controller provided in the conventional bar processing machine, the bar feeding device 1 does not need to be provided with a controller for residual length detection and abnormality detection. However, it is possible to detect the remaining bar length and monitor the feed error without significantly increasing the manufacturing cost of the bar processing apparatus, which is extremely advantageous in practical use.

The preferred embodiments of the present invention have been described above in detail. However, the present invention is not limited to the above-described embodiments, and various modifications or changes can be made within the scope of the invention described in the claims of the utility model. It goes without saying that modifications are possible and those are included in the scope of the present invention. For example, the controller 25 of the bar processing apparatus 1 is configured to select three processing programs as appropriate, but the controller 25 may be configured to select a larger number of processing programs.

The controller 25 may be configured to operate a control device other than the controller 25, for example, an alarm device such as a remote monitoring board.

[0030]

[Effect of the device]

 According to the above-mentioned configuration of the present invention, the bar machining apparatus includes a movement amount detection device that constantly detects the movement amount of the bar feeding member, and a machining program selection control unit to which the detection result of the movement amount detection device is input. With the control device for the bar processing machine equipped with, the remaining length of the bar is calculated based on the detection result of the movement amount detection device, and the remaining length of the bar is processed in order to process to the end of the bar. Since a suitable machining program can be selected according to the requirements, when a bar material is supplied to the bar processing machine and the initial bar length cannot be predicted, the bar processing device It is possible to perform processing over the entire length, which can reliably reduce the length of the residual material. Then, the machining program selection control unit can constantly monitor the feeding abnormality of the rod during the machining feeding based on the movement amount of the rod feeding member. However, since such control can be performed using the control device of the bar processing machine, the above control can be achieved at low cost without increasing the manufacturing cost of the entire bar processing apparatus.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a bar material processing apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart partially showing a mode of processing control executed in a controller of a bar processing machine.

FIG. 3 is a flowchart partially showing a mode of processing control executed in a controller of a bar processing machine.

[Explanation of symbols]

 1 Bar Material Supply Machine 2 Bar Material Processing Machine 11 Main Frame 12 Material Shelf 13 Feed Arrow 14 Endless Chain 15 Driven Sprocket 16 Drive Sprocket 17 Drive Motor 18 Rotary Encoder 21 Spindle 22 Collet Chuck 23 Spindle 24 Byte 25 Controller

Claims (1)

[Scope of utility model registration request] 1. A bar material processing apparatus having a bar material processing machine for turning a bar material according to a processing program, and a bar material supply machine for supplying the bar material to the bar material processing machine for each predetermined processing length. In, the bar material feeder, a bar material feeding member for advancing the bar material,
The bar processing machine has a drive device for driving the bar material feeding member, and a movement amount detection device for constantly detecting the movement amount of the bar material feeding member. A control device having an operation control unit for controlling the drive mechanism, a program storage unit for storing a plurality of selectable machining programs, and a machining program selection control unit for inputting the detection result of the movement amount detection device is provided. However, the machining program includes a plurality of machining programs capable of machining rods having different lengths, and the machining program selection control unit controls the remaining amount of the rods based on the detection result of the movement amount detection device. To calculate the length and process up to the end of the bar, select an appropriate machining program according to the remaining length of the bar, and the operation control unit will process the bar based on the selected machining program. Before Controlling the drive mechanism, the machining program control unit further determines an abnormality of the machining feed by the feed arrow based on the detection result of the movement amount detection device, and instructs the alarm device to issue an abnormality alarm. A bar processing device characterized in that