JPH09117803A - Bar material carrying quantity detector of bar material feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately calculate the moving amount of a bar material by providing a calculating means for detecting the linear displacing amount of a carrying means, that is, the moving amount of a bar material, by a displacement detecting means, outputting this amount in the form of an electric signal and calculating the carrying quantity of the bar material based on this electric signal. SOLUTION: Processing performed by a CPU 22 is largely divided into one as a calculating means for counting the output pulse signal of a rotary encoder 20 and calculating the carrying quantity of a bar material (referred to as a counter, hereinafter), one for comparing a counted value with a preset value and each arithmetic processing performed based on comparison processing. By the comparison arithmetic processing, an input signal is provided for alarm processing carried out so as to issue an alarm regarding the excessive feeding of the bar material or the shortage thereof. An alarm is issued by lighting an alarm display lamp provided on an operation panel 3 corresponding to each cause of alarm or displaying the alarm on a display 34.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar material supplying device for automatically supplying a bar material, which is a material to be processed, to a bar material processing device such as a lathe, and more particularly to detecting a bar material supply amount (conveyance amount). It belongs to the technical field of equipment.

[0002]

2. Description of the Related Art A bar feeder is a feed motor (drive source).
Rotation of the rod is transmitted to the feed chain extending in the conveying direction of the rod to convert the rotational movement into linear motion, and the finger chuck at the tip of the feed pipe attached to this feed chain grips the rear end of the rod. In this state, the bar is continuously fed to the bar processing device toward the tip side thereof.

In the above-mentioned bar feeding device, the rod is usually fed in a constant size, though it depends on the processing content of the processing device. In that case, it is determined whether or not the rod is correctly fed. Need to detect. As a device for detecting the position of the bar, conventionally, a limit switch is arranged on the support base of the bar feeder, and a series of operations are performed by using its ON-OFF signal as a timing signal (special feature). (See KAISHO No. 62-9803, FIG. 17 and related explanations). Also, the supply length of the bar material per time is
It was controlled by using a timer or the like.

[0004]

As described above, since the device for detecting the supply amount of the bar material in the conventional bar material supplying device uses the limit switch, the installation of the limit switch and the wiring therefor are necessary. However, it was inevitable that the device configuration would be complicated due to the wiring.

Further, since the control of the bar material supply amount is carried out by the timer signal for a fixed time, the end of the timer signal can be regarded as the feed completion signal regardless of the actual feeding state of the bar material. Therefore, the bar is caught,
Even if it is out of the way, it will be handled unilaterally as completion of feeding, and it was uncertain as supply control for automated operation.

According to the present invention, there is provided a bar material supply amount detecting device capable of accurately detecting a bar material conveying amount in a bar material supplying device and using the detection data to complete automatic operation of the bar material supplying device. The purpose is to provide.

[0007]

In order to solve the above-mentioned problems, the present invention provides a driving means such as a motor for conveying a rod, and a driving force of the driving means for moving the rod in the longitudinal direction. And a conveying means such as a feed pipe for conveying the rod to a rod processing device arranged at one end side in the longitudinal direction of the rod to feed and supply the rod in the longitudinal direction. A displacement detecting means such as a rotary encoder for converting the linear displacement amount of the conveying means into an electric signal and outputting the electric signal; a conveying amount calculating means such as a CPU for calculating the conveying amount of the bar material from the electric signal; CP for comparing the calculated carry amount with a preset reference carry amount
A message corresponding to the content of the abnormality is displayed as a character based on an alarm signal when the comparison deviation amount output from the comparison means such as U corresponds to a preset value set in advance corresponding to the conveyance abnormality. And a display unit such as a display device.

According to the operation of the present invention, the displacement detecting means is
The linear displacement amount of the conveying means is converted into an electric signal and output.
Then, the carry amount calculating means calculates the carry amount of the bar material from the electric signal.

After that, the comparison means compares the calculated carry amount with a preset reference carry amount. This allows
The display means displays a message corresponding to the content of the abnormality in a character display based on the alarm signal when the comparison deviation amount output from the comparison means corresponds to the set value set in advance corresponding to the conveyance abnormality.

Therefore, since the carrying amount of the rod is calculated from the electric signal, the moving amount of the rod can be accurately obtained. In addition, since the feeding abnormality in the bar feeding is displayed with the character thereof, it is possible to immediately recognize the presence or absence of the abnormality in the bar feeding and its content.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. Bar Material Processing Device First, an outline of the bar material processing device will be described. As shown in FIG. 2, a bar supply device 2 is arranged adjacent to a lathe 1 as a bar processing device. Reference numeral 3 denotes an operation panel of the bar supply device 2, and reference numeral 4 denotes a control box. Bar Material Supply Device Next, FIG. 3 schematically shows the configuration of the bar material supply device 2.
A feed motor 5 is provided at one end of the bar feeding device 2,
The V-belt 8 is wound around the pulley 6 attached to the rotating shaft and the pulley 7 on the side of the conveying means to feed the motor 5.
The rotation of is transmitted.

The conveying means includes a sprocket wheel 9 provided coaxially with the pulley 7, a sprocket wheel 10 provided at intervals corresponding to the feed stroke in the rod conveying direction, and between the sprocket wheels 9 and 10. And the feed chain 11 disposed in the
And a finger chuck 13 provided at the tip of the feed pipe 12. This finger chuck 13 has a bar 14
The rear end is gripped, the feed chain 11 is driven by rotating the feed motor 5, and the bar 14 is conveyed and moved toward the tip side (that is, in the longitudinal direction) together with the feed pipe. , Are sequentially sent to the lathe 1.

In FIG. 3, reference numeral 15 denotes a tip sensor for detecting the tip position of the bar 14 at the time of initial setting, which is constituted by using a photo coupler or the like. Reference numeral 16 denotes a bar material set length at the time of processing, and 17 denotes a cut length cut to output dimensional accuracy when the bar material 14 is processed by the lathe 1.
Reference numeral 18 is a blade (bite) of the lathe 1, and 19 is a chuck. Bar Material Conveyance Amount Detection Device Next, an embodiment of the bar material conveyance amount detection device in the above bar material supply device will be described. FIG. 1 shows the configuration of the bar supply device and the detection device. In FIG. 1, the third
The same parts as those in the figure are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 1, the pulley 7 of the conveying means.
A rotary encoder 20 is coaxially connected to the rotary encoder 20. The rotary encoder 20 has a predetermined number (for example, 2000 pulses / 1) according to the rotational angle displacement amount of the pulley 7 (that is, the linear displacement amount of the feed chain 11 = the linear displacement amount of the bar 14).
Rotation) pulse signal is output. This pulse signal is input to a detection device housed in the control box 4.

The detection device includes an input device 21 for receiving a pulse signal from the rotary encoder 20, a microcomputer (hereinafter referred to as CPU) 22 for processing the input signal, and a processed signal output from the CPU 22 to the outside. And an output device 23 for outputting. Reference numeral 34 is a display, and 35 is an input keyboard.

Next, the processing of the CPU 22 will be described with reference to FIGS.
This will be described with reference to the drawings. The process performed by the CPU 22 is roughly classified into a process (hereinafter referred to as a counter) as a calculation unit that counts the output pulse signal of the rotary encoder 20 and calculates the transport amount of the bar material, and the count value is set in advance. It is composed of a process of comparing with a value and each calculation process described later based on the comparison process. As shown in FIG. 4, the counter includes a first counter 24 and a second counter 25.
And a third counter 26. Hereinafter, details of each counter will be described. The set values N ₀ ... N ₁₅ , N ₂₀ , N ₂₁ , N ₃₀ , N ₃₁ described below are
Although not shown, it is stored in the random access memory.

The count value n ₁ of the first counter 24 is calculated by processing 27 for calculating the current position of the feed pipe 12 and displaying the calculated value, processing 28 for calculating the remaining material length and displaying the calculated value 28, and sticking in advance. It is provided to each process as an input signal for the process 29 of the comparison operation of the set value N ₀ ... N ₁₅ set corresponding to the operation timing of each component of the material supply device and the count value n ₁ .

As shown in FIG. 5, the current position display processing 27 converts the count value n ₁ from the first counter 24 into a unit of millimeter (mm) (step 100) and displays it on the operation panel 3. The current position is displayed on the container 34 (step 101).

In the remaining material length display processing 28, as shown in FIG. 5, the count value n ₁ from the first counter 24 is set to a preset value N ₀ (preset corresponding to the initial length of the bar material). The current count value n ₁ is subtracted from the count value (N ₀ −n ₁ ) to calculate the remaining amount m (step 1
02), then converted to millimeters (mm) (step 103) and displayed on the display 34 on the operation panel 3 (step 104).

As shown in FIG. 5, the comparison calculation process 29 carries out a comparison calculation for each set value N ₀ ... N ₁₅ (steps 105 _-0 ... 105 _-15 ) and count value n.
_{When 1} reaches each set value N ₀ ... N ₁₅ (YES), timing signals C ₀ ... C ₁₅ are output (see FIG. 8) (step 106). An example of the correspondence between the set values N ₀ ... N ₁₅ and the timing signal outputs C ₀ ... C ₁₅ and the signal contents thereof is as shown in the process 29 of FIG.

The count value n ₂ of the second counter 25 is the set value N ₂₀ , N ₂₁ and the count value n which are set corresponding to the display processing 30 of the count value n ₂ and the feeding operation of the bar.
_It is supplied to the input signal of the alarm processing 31 for the over-delivery and under-delivery of the bar by the comparison calculation processing with ₂ .

Details of the alarm processing 31 are shown in FIG.
In step 200, the delivery amount confirmation count set value N
₂₀ , the delivery amount overcount set value N ₂₁ is set. Next, when a chuck open signal is input from the bar processing device side (step 201), a feed pipe advance timer is started (step 202). The delivery rate in step 204 in this case the count value n ₂ compares whether reaches the set value N ₂₁ if (step 203), the count value n ₂ exceeds the set value N ₂₁ (YES) An over alarm is output. As for the form of the alarm, a warning indicator light provided corresponding to each cause of the alarm on the operation panel 3 may be turned on, or the display 34 may indicate that. When the alarm content is displayed on the display 34, the outputs C ₂₁ and C ₃₁ output corresponding to the set values N ₂₁ and N ₃₁ are stored in a random access memory (not shown).
The alarm content data is stored in the address allocated in the random access memory corresponding to each access signal and is read out at the time of alarm output and transferred to the display unit 34. Count value n ₂ is set value N
If the value is lower than ₂₀ , steps 203 to 20
Move to 5. In step 205, it is compared whether or not the count value n ₂ has reached the set value N _20, and if it has not reached (N
O) determines in step 206 whether or not the preset time of the feed pipe advance timer has been exceeded. If the time is not up (NO), return to step 203,
Steps 203 and 205 are repeated again. When the time is up (YES), it means that the count value n ₂ has not reached the set value N ₂₁ , even though the specified time has elapsed, and therefore the amount of delivery is insufficient. Then, an alarm to that effect is displayed (step 207).
The cause of the shortage of the delivery amount may be a phenomenon such as a feed pipe being caught or a trouble occurring on the lathe side. When the count value n ₂ reaches the set value N ₂₁ normally, the sending completion signal is output (step 208) and the chuck open signal is turned off (step 209).
A reset signal for initializing the counter 24 is input to the first counter 24 (step 210). Thereafter, the above-described operation is similarly repeated at the timing shown in FIG.

The count value n ₃ of the third counter 26 is used as an input signal to the display processing 32 of the count value n ₃ and the alarm processing 33 of the over-introduction to the bar processing machine. Details of the alarm processing 33 are shown in FIG. When the rod tip detection signal is input in step 300, the third counter 26 starts in step 301. next,
In step 302, the chuck passing position confirmation count value N ₃₀
Also, the abnormal delivery amount count value N ₃₁ for introduction and delivery to the chuck is set. Then, in step 303, the set value N ₃₀ and the count value n ₃ are compared, and the count value n ₃ is set to the set value N _30.
When it reaches, the feed pipe advance timer is started (step 304). Next, it is judged whether or not the count value n ₃ exceeds the set value N ₃₁ (step 30).
5) If it exceeds (YES), an alarm is output that the amount of introduction into the chuck is abnormal (step 30).
6). As the alarm display means, the warning light on the operation panel 3 is turned on as described above, or the alarm message is displayed in characters on the display 34. Next, when the preset time of the feed pipe advance timer has expired,
A delivery completion signal is output (step 308) indicating that a predetermined amount of bar material has been advanced, and then the third counter 26
A reset signal is input to the third counter 26 in order to initialize (step 309). Hereinafter, similarly, the above-described operation is repeated at the timing shown in FIG.

FIG. 11 shows the appearance of the operation panel 3.
A liquid crystal display is used as the display 34, and a sheet key is used as the input keyboard 35. 36 is an alarm lamp (red), 37 is a bar feed (yellow), 38 is a stop push button switch (alarm reset), 39 is an automatic push button switch (green lamp), 40 is an eject push button switch, and 41 is a feed pipe forward movement. A backward toggle switch, 42 is an introduction guide set / reset toggle switch.

[0025]

As described above, according to the present invention,
The displacement detecting means detects the linear displacement amount of the conveying means, that is, the moving amount of the bar and outputs it in the form of an electric signal, and the conveying amount of the bar is calculated based on the electric signal. The amount can be accurately determined.

Therefore, the calculated movement amount can be applied to various applications, and can contribute to the complete automation of the bar material feeder. Further, since the feeding abnormality in the bar feeding is displayed with the content message, the presence or absence of the abnormality in the bar feeding and its content can be immediately recognized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a front view showing an outline of a bar material supplying device and a bar material processing device.

FIG. 3 is a schematic diagram showing a configuration of a bar material supply device.

FIG. 4 is a block diagram showing the processing contents of a microcomputer according to the present invention.

FIG. 5 is a flowchart showing a related operation flow of a first counter.

FIG. 6 is a flowchart showing a related operation flow of a second counter.

FIG. 7 is a flowchart showing a related operation flow of a third counter.

FIG. 8 is a timing chart of the counting operation of the first counter.

FIG. 9 is a timing chart of the counting operation of the second counter.

FIG. 10 is a timing chart of the counting operation of the third counter.

FIG. 11 is an external view of an operation panel.

[Explanation of symbols]

 5 ... Feed motor 6, 7 ... Pulley 8 ... V belt 9, 10 ... Sprocket 11 ... Feed chain 12 ... Feed pipe 13 ... Finger chuck 14 ... Rod 20 ... Rotary encoder 21 ... Input device 22 ... Microcomputer 23 ... Output device 24 ... 1st counter 25 ... 2nd counter 26 ... 3rd counter

Claims (3)

[Claims] 1. A drive means for transporting a rod, and a transport means for transporting the rod in a longitudinal direction thereof by a driving force of the drive means, the drive means being disposed at one longitudinal end side of the rod. In a bar material supplying device which conveys and supplies the bar material to a bar material processing device in the longitudinal direction thereof, displacement detecting means for converting the linear displacement amount of the conveying means into an electric signal and outputting the electric signal, and the electric signal. From the transfer amount calculation means for calculating the transfer amount of the bar from, the comparison means for comparing the calculated transfer amount with a preset reference transfer amount, the comparison deviation amount output from the comparison means in advance. A bar material for a bar material supply device, comprising: a display unit for displaying a message corresponding to the content of the error in a character display based on an alarm signal when the set value set corresponding to the conveyance abnormality is met. Transport amount detection device. 2. The bar material conveying amount detecting device for a bar material supplying apparatus according to claim 1, wherein the display means is configured by using a liquid crystal display. Transport amount detection device. 3. The bar material feeding amount detecting device of the bar material supplying device according to claim 1, wherein a sheet key is used as an input means for inputting the set value. Bar material conveyance amount detection device.