JP2695538B2 - Running material cutting method in numerical controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention automatically cuts a continuous material fed from a material feeder to a predetermined length by a cutting means which reciprocates in a running direction of the material without stopping. The present invention relates to a running material cutting method in a numerical controller.

[0002]

2. Description of the Related Art Conventionally, when a continuous material traveling at a constant speed along a predetermined line is cut to a predetermined length without stopping, a cutter body which reciprocates in a traveling direction of the material is provided. A traveling material cutting method is generally used in which the position of a cutter attached to a main body is adjusted to a position having a predetermined length and the speed is adjusted to the speed of the material to cut the material by the cutter. FIG. 3 is a block diagram showing an example of a numerical controller for realizing a conventional running material cutting method, and FIG. 4 is a flowchart showing an example of its operation. The repetition counter control unit 19 has a count value SC.
Is cleared (step S1). The part program analysis unit 21 reads and analyzes the following part program PP stored in the part program storage unit 16 in advance (step S2). N001GOOX ₀ Travel cutting fixed cycle Positioning to start position N002G79X ₁ L ₁ Q ₁ 1st travel cutting fixed cycle N003G79X ₂ L ₂ Q ₂ 2nd travel cutting fixed cycle N004M02 where X ₁ and X ₂ are target values, L ₁ , L ₂ is the cutting length,
Q ₁ and Q ₂ are commands for the number of repetitions.

The part program analysis unit 21 sets a cutting length command L ₁ in the cutting length storage unit 22 (step S3),
The repeat count command Q ₁ is set in the repeat count designation storage unit 23 (step S4). The cutting length storage unit 22 converts the set cutting length L ₁ into the number of pulses Lp (step S
5). When the count value SC from the repetition counter control unit 19 is 0, that is, in the first disconnection cycle (step S6), the gate G2 disconnects the disconnection operation start command SCM from the part program analysis unit 21 via the gate G4. It is sent to the start counter storage unit 17. Pulse counter 12
Reads the pulse PS of the pulse generator PG operated by the traveling movement of the material 2, sets it as FEEDC, and sends it to the cutting start counter storage unit 17 (step S7).
Upon receiving the cutting operation start command SCM from the gate G4, the cutting start counter storage unit 17 sets FEEDC sent from the pulse counter 12 to PCOUNT (step S10), and causes the function generation unit 18 to operate the cutting cycle. Function generator 18 is driven by the target value X pulse generator PG of the cutting body 4 of the drive motor driver 11 based on the pulse PS with respect to _1, the drive motor 10 and the cutter body feed drive mechanism 9 (step S11).

Further, the speed of the cutter body 4 obtained by the position detector 7 attached to the drive motor 10;
Material 2 obtained by pulse PS of pulse generator PG
Are compared by the speed comparator 15 (step S12).
If the two speeds match, a cutting command SSC is sent to the cutting control unit 8 (step S13), and the material 2 is cut by the cutter in the cutter body 4. The function generating unit 18 checks whether or not the cutting completion signal SCED has been input from the cutting control unit 8 (step S14), and upon input of the cutting completion signal SCED, the drive motor driving unit 11, the driving motor 10, and the cutter body feed driving mechanism 9 As a result, the cutter body 4 is returned to the predetermined position (steps S15 and S16), and the function generation end signal SFE is repeatedly sent to the counter control unit 19 to count up the count value SC (step S17). The number-of-repetitions comparison unit 20 stores the count value SC of the repetition counter control unit 19 and the number-of-repetitions designation storage unit 23
Is compared with the command Rc of the number of repetitions stored in the memory (step S18).
When it is equal to c, all the processing ends.

On the other hand, when the count value SC is less than the command Rc of the number of repetitions, the process returns to step S6. Since this time is not the first disconnection cycle, the adder 13 determines that the number of pulses Lp of the disconnection length L ₁ stored in the disconnection length storage unit 22 and the previous disconnection cycle stored in the disconnection start counter storage unit 17 are the same. The value PCOU of the pulse counter 12 stored in
Add NT and. The pulse counter 12 reads the pulse PS of the pulse generator PG, sets it as FEEDC, and sends it to the comparator 14 (step S8). Comparator 14
Is the added value from the adder 13 and the value F of the pulse counter 12
Compared with EEDC (step S9), FEEDC ≧ P
When it becomes COUNT + Lp, open gate G3 and FE
EDC disconnection start counter storage unit 1 via gate G4
7 Then, steps S10 to S1 described above.
The operation of 8 is repeated. When the running disconnection fixed cycle of the sequence of N002 is completed by repeating the above-described processing Q _{1 and} the running disconnection fixed cycle of the sequence of N003 is performed, the operations of steps S1 to S18 are similarly performed, and the cutting cycle of the cutting length L ₁ is performed. The number of repetitions Q ₂ is performed.

[0006]

In the above-described conventional running material cutting method, since the first cutting cycle is immediately started in the sequence N003 of the part program, the cutting is performed in the first cutting cycle. The cutting length of the material is shorter than the cutting length L ₂ instructed by the part program. Therefore, there is a problem that the first material of the cutting cycle is wasted every time the sequence is changed, and a special treatment for removing only the short material is required in the subsequent process. The present invention has been made under the circumstances as described above, and an object of the present invention is to provide a traveling cutting fixed cycle in which the cutting length is continuously changed when a second traveling cutting fixed cycle is commanded. It is an object of the present invention to provide a running material cutting method in a numerical control device capable of cutting a material with a cutting length commanded from the first cutting.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a cutting means that reciprocates in the traveling direction of a material without stopping a continuous material delivered from a material supply device at a constant speed is automatically adjusted to a predetermined length. The present invention relates to a running material cutting method in a numerical control device for cutting, and when the previous sequence is a running cutting fixed cycle, when the final cutting cycle of the running cutting fixed cycle of the preceding sequence is started, This is accomplished by initiating the first cutting cycle of the running cut canned cycle of the current sequence when the distance traveled by the material from the position reaches the commanded cutting length of the running cut canned cycle of the current sequence.

[0008]

In the present invention, the commanded cutting length and the material position at the start of the last cutting cycle of the preceding traveling cutting fixed cycle are used for the first cutting cycle in the second and subsequent traveling cutting fixed cycles. Since it is started when the traveling distance of the material becomes equal, the material can be cut with the cutting length commanded from the first time.

[0009]

FIG. 1 is a block diagram showing an example of a numerical control device for realizing the running material cutting method of the present invention in correspondence with FIG. 3, and FIG. 2 is a flow chart showing its operation example in correspondence with FIG. Therefore, the same components are denoted by the same reference numerals and the description thereof will be omitted. If the count value SC from the repeat counter control unit 19 is 0, that is, the first cutting cycle (step S6), the continuous traveling cutting fixed cycle determination unit 24 determines whether or not the previous sequence was the traveling cutting fixed cycle. If the previous sequence is not the traveling disconnection fixed cycle (step S19), the command SN is set to the gate G2.
To send to. The gate G2 is the part program analysis unit 21.
And sends a cutting operation start command SCM from the cutting start counter storage unit 17 via the gate G4. The pulse counter 12 is a pulse generator P that operates by the traveling movement of the material 2.
The G pulse PS is read, set as FEEDC, and sent to the disconnection start counter storage unit 17 (step S
7) and thereafter, the operations of steps S10 to S18 are performed.

On the other hand, if the previous sequence is the traveling disconnection fixed cycle in step S19, the command SY is issued.
Is output to the gate G1 by the continuous traveling cutting fixed cycle determination unit 24. The adder 13 uses the pulse number Lp of the cutting length L ₂ stored in the cutting length storage unit 22 and the pulse counter 12 of the last cutting cycle of the running cutting fixed cycle of the previous sequence stored in the cutting start counter storage unit 17. Value of PCOUNT is added. The pulse counter 12 reads the pulse PS of the pulse generator PG, sets it as FEEDC, and sends it to the comparator 14 (step S20).
The comparator 14 compares the added value from the adder 13 with the value FEEDC of the pulse counter 12 (step S21), and F
Gate G1 when EEDC ≧ PCOUNT + Lp
Is opened and FEEDC is sent to the disconnection start counter storage unit 17 via the gate G4. Thereafter, steps S10 to S1
8 is performed, and when the count value SC is equal to the repeat count command Rc, all processing is terminated.

[0011]

As described above, according to the running material cutting method in the numerical controller of the present invention, when the running cutting fixed cycle with different cutting lengths is continuously instructed, the second
Since the material can be cut with the commanded cutting length from the first cutting in the traveling cutting fixed cycle after the second time, the material can be effectively used and
A special process for removing only the short material in the subsequent process is not required, and the processing cost can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a numerical control device for realizing a running material cutting method according to the present invention.

FIG. 2 is a flowchart illustrating the method of the present invention.

FIG. 3 is a block diagram showing an example of a numerical control device that realizes a conventional running material cutting method.

FIG. 4 is a flowchart illustrating a conventional method.

[Explanation of symbols]

 24 Continuous running cutting Fixed cycle determination unit

Claims (1)

(57) [Claims] 1. A cutting means for reciprocally moving in the traveling direction of the material by reading the count value of pulses generated by the traveling movement of the continuous material sent at a constant speed, and controlling the speed of the cutting means. When the relative position between the cutting means and the material is controlled and the material is automatically cut into a predetermined length without being stopped, when the previous sequence is a traveling cutting fixed cycle, the traveling cutting fixed cycle of the previous sequence When the traveling distance of the material from the position of the material at the start of the final cutting cycle of is the command cutting length of the running cutting fixed cycle of the current sequence, the first cutting cycle of the running cutting fixed cycle of the current sequence. A method for cutting a traveling material in a numerical control device, which is characterized in that