JPH0665452B2 - 4-axis simultaneous machining editing method in automatic programming - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention provides an appropriate and efficient cutting speed, cutting time, and output of a processing device based on cutting conditions and the like when checking the suitability of simultaneous processing combination data. As described above, the present invention relates to a 4-axis simultaneous machining / editing method in automatic programming for re-editing simultaneous machining combinations.

(Technical background of the invention and its problems) The 4-axis simultaneous machining combination in the numerical control lathe automatic program and interactive manual data input can be specified by inputting according to the material shape, workpiece shape, processing content and processing range. There is also a method of performing the combination automatically in accordance with predetermined combination data, although it is uniform in some cases.

However, for any combination of simultaneous machining methods, the suitability of simultaneous machining data for investigating whether the cutting speed, machining time and power required for cutting of each tool to be simultaneously machined are appropriate and improving The operator had to perform the check manually, and this work required a lot of labor and time.

(Object of the Invention) The present invention has been made under the circumstances as described above, and an object of the present invention is to provide an appropriate inspection speed, machining time, cutting power, etc. of each tool in four-axis simultaneous machining. An object of the present invention is to provide a 4-axis simultaneous machining / editing method in automatic programming for automatically re-editing appropriate and efficient simultaneous machining data.

(Summary of the Invention) The present invention relates to a simultaneous machining editing method for checking the suitability of simultaneous machining data in simultaneous machining of four axes using automatic programming for a numerically controlled lathe and interactive manual data input, and a work shape and cutting conditions. Comparing the appropriate spindle rotation speed of each tool for simultaneous machining of the work obtained from the machining data such as, if there is a defect, after changing the conditions of simultaneous machining by integrating with the preceding and following machining or dividing the machining site, If there is a problem by comparing each machining time of simultaneous machining, if the conditions of simultaneous machining are changed by integrating with the preceding and subsequent machining or dividing the machining site, the cutting power required for simultaneous machining and the rated power of the machining equipment are compared. In comparison, if the cutting power is overloaded with respect to the rated power, change the cutting conditions such as the depth of cut, cutting speed, feed, etc. The simultaneous processing data is re-edited by modifying the above. .

(Embodiment of the Invention) FIG. 1 is a block configuration diagram showing an outline of a control device for carrying out a 4-axis simultaneous machining / editing method in automatic programming of the present invention. For example, a display 1 of a CRT displays machining programs and data. Along with the display, guidance for various data input operations is displayed, and the keyboard 2 is the display 1
Guides you through the process range, process content, tools used, cutting conditions, cutting time, and other data related to each process, work shape data, material shape data, simultaneous machining combination data, and data necessary for simultaneous machining such as the cutting sequence. It is for inputting. The input control unit 3 reads data input from the keyboard 2 and displays the data on the display 1, and stores the data in the input data storage unit 4. The display 5 displays data used for determining suitability for simultaneous machining combinations, such as a pass / fail judgment coefficient and a relaxation allowance coefficient related to cutting speed, a pass / fail judgment condition regarding processing time, and a division condition of a processed portion, and inputs various data. The operation is displayed as guidance, and the input of these data is performed through the keyboard 6 according to the guidance of the display 5. Registration control unit 7
Reads the data input from the keyboard 6 and displays it on the display 5, and stores the data in the registered data storage unit 8. The cutting speed check editing unit 9, the processing time check editing unit 10, and the total horsepower check editing unit 11 are based on various data stored in the input data storage unit 4 and the registered data storage unit 8 and are respectively processed by the methods described below. , The simultaneous machining combination data is re-edited so that the cutting speed, the machining time in the simultaneous machining and the cutting power required for the simultaneous machining are appropriate, and the edited result is stored in the edited data storage unit 12.
Remember.

FIG. 2 shows 4 in automatic programming according to the present invention.
It is a flow chart showing a simultaneous axis machining execution method, in which the cutting speed check editing unit 9 reads necessary data from the input data storage unit 4 and the registration data storage unit 8 to check whether the cutting speed is appropriate or not. (Step S1). That is, the quality judgment coefficient of cutting speed
When 0.7-1.0, relaxation tolerance coefficient of cutting speed is 0.7-1.3, pi is π, cutting speed is V, cutting diameter is D, and spindle speed is N, the relationship shown in the following formula (1) is established. .

At this time, for example, when the portions indicated by A and B of the work 13 as shown in FIG. 3 are cut by the upper tool post and the lower tool post, respectively, when the standard cutting speed V is "130", Optimum spindle speed for platform and lower turret
N ₁ and N ₂ are calculated by the above equation (1). Therefore, the spindle speed N in simultaneous machining is 400 (rp
m) is set. Therefore, the cutting speed V ₂ of the lower cutting tool must be changed by the following equation.

The reduction rate of the cutting speed due to this change is V ₂ /V=75/130=0.576, which is judged to be unsuitable because it is less than the pass / fail judgment coefficient of the cutting speed. Relaxation adjustment of the spindle speed N Is performed (step S2). If the reduction rate of the cutting speed is within the coefficient of acceptability of the cutting speed, it is determined to be appropriate, and the simultaneous machining combination data is processed by the machining time check editing unit 10.
Sent to (step S7). If it is determined that the cutting speed is inappropriate, it is changed by increasing the spindle speed N normally, and the ratio V between the cutting speeds V ₁ ′ and V ₂ ′ of the upper and lower turrets and the standard cutting speed V is changed. ₁ '/ V and V _2' / V is to enter the relaxed tolerance coefficient cutting speed (step S2).

Next, it is determined whether or not V ₁ ′ / V and V ₂ ′ / V are within the relaxation tolerance coefficient (step S3). For example, the third
If you change the spindle speed N from "400" to "500" in the example of the figure, And V ₁ ′ /V=157/130=1.21 V ₂ ′ /V=94/130=0.72 with respect to the standard cutting speed V, both of which are judged to be good because they are within the relaxation allowance coefficient of the cutting speed. The simultaneous machining combination data is sent to the machining time check editing unit 10 (step S7). Cutting speed V ₁ ′ and V ₂ ′
If both cannot be included in the relaxation allowance coefficient of cutting speed, it will be a single machining, but since the machining efficiency will decrease in a single machining, it is integrated by incorporating it in the simultaneous machining combination before or after, that is, before and after. Integration (step S4).

This will be illustrated and explained. In FIG. 8 (A), the machining process B of the upper tool rest and the machining process B of the lower tool rest are simultaneously combined, and similarly, the machining processes C and D are simultaneously combined. If there is machining data, the suitability of this data is checked, the simultaneous machining combination of machining steps a and b is judged to be good (the agility spindle speed of machining steps a and b is, for example, 500), and the machining process c When it is judged that the simultaneous machining combination of the and the two is not suitable (the suitable spindle rotational speed of the machining step C is, for example, 1000, the suitable spindle rotational speed of the machining step is, for example, 550), the processing is carried out as it is, and FIG. As shown in, the processing efficiency has to be reduced because the processing has to be performed individually.

Therefore, an aptitude check is performed to incorporate and integrate the machining steps C and D into the machining steps a and b of the previous simultaneous machining combination, and as a result, the machining step 2 can be incorporated as shown in FIG. 8 (C). Since the main spindle speed of machining steps A and B is 500, the main spindle speed of machining step D is 550, and the cutting speeds of steps A, B, and D are within the relaxation tolerance coefficient, It is intended to improve the machining efficiency by pre-integrating D into the previous simultaneous machining combination B and B. By this front-rear integration, it is determined whether or not the simultaneous machining data is appropriate (step S5), and if not, the same machining part division as in step S10 described later is performed (step S6),
The simultaneous machining combination data is transferred to the machining time check editing unit 10 (step S7).

The processing time check editing unit 10 first determines whether or not the processing time of the upper tool rest and the lower tool rest in the simultaneous processing is appropriate (step S7). That is, if the processing time quality determination condition, for example, the ratio of the processing time of the upper turret and the lower turret is within 2 times and the difference is within 15 seconds, it is determined to be good, and otherwise it is determined to be good.

FIG. 4 is a diagram showing an example of simultaneous machining, which is the C of the work 14.
And D are cut by the upper turret and the lower turret, respectively. In this example, as shown in FIG. 5 (A), the processing time of the upper turret and the lower turret is 50 seconds and 5 seconds, respectively, and the ratio and the difference are 10 respectively.
Since it is doubled and 45 seconds, it is judged as no and step S
Perform the same front-back integration as in step 4 (step S8), step S
The same judgment as in 7 is made (step S9). In the example of FIG. 4, it is determined as no because there is no other simultaneous machining process before and after, and if each machining site C and D can be divided according to the machining site division condition, it is divided (step S10), and the division is performed. It is determined whether it has been performed (step S11). Fourth
In the example of the drawing, the machining portion D cannot be divided because the machining time is short, but the machining portion C can be divided, and the machining portion formed by the upper and lower turrets as shown in FIG. 5B. Divide into C ′ and C ″. When the machining portion is divided as in this example, the machining portion is divided into C ′ and C ″.
Then, the front and rear integration is performed for the other processed portion D,
For example, as shown in FIG. 5 (B), processed parts C ″ and D
Are integrated (step S12). The machining time check editing unit 10 determines whether it is appropriate in steps S7 and S9, whether the machining site division is not performed in step S11, or the front-rear integration is performed in step S12, and then the simultaneous machining combination is performed. The data is transferred to the total horsepower check editing unit 11.

The total horsepower check unit 11 obtains the cutting power required for machining based on the simultaneous machining combination data (step S13), and if it is equal to or higher than the rated power of the machining equipment, calculates the ratio (step S14) and re-establishes the cutting conditions. After editing (step S15) and after re-editing or if the cutting power is less than or equal to the rated power in step S13, the processing is ended, and the simultaneous machining combination data is stored in the edited data storage unit 12. When the machining portions E and F of the work 15 as shown in FIG. 6 (A) are cut at the cutting speed, the cutting depth and the cutting feed as shown in FIG. 7 (A), the result is shown in FIG. 6 (A). As shown by the tool locus, both the machined parts E and F can be machined by cutting twice. However, at this time, the total cutting power required by the processing equipment was 17.4.
(KW), which exceeds the rated power of the processing equipment of 11 (KW),
Since the load becomes overloaded (step S13), the ratio of overloaded is calculated (step S14).

Cutting power / rated power = 17.4 / 11 = 1.58 If this ratio is less than “2”, the cutting amount is specified. If it is “2” or more, the cutting amount and cutting speed are set. If it is “4” or more, the cutting amount is set. ，
Change the cutting speed and feed to keep the cutting power below the rated power. In this example, the cutting amounts of the upper turret and the lower turret are changed by the following formula.

Depth of cut for upper turret: 5 ÷ 1.58 = 3.16 ≒ 3 Depth of cut for lower turret: 4 ÷ 1.58 = 2.52 ≒ 2.5 As a result, the cutting is performed as shown in Fig. 6 (B). On the other hand, the upper turret and the lower turret each perform three times of cutting, and the cutting power at that time is 10.6 (KW) as shown in FIG. 7 (B).

Input of each data to the input control unit 3 and the registration control unit 7 may be performed not only via the keyboards 2 and 6 as in this example, but also may be transferred from another system.

(Effect of the Invention) As described above, according to the present invention, in four-axis simultaneous machining, the cutting speed, machining time and cutting power are automatically checked, and appropriate and efficient simultaneous machining data is created by re-editing. This has the advantage that the burden on the operator can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a block configuration diagram showing an outline of a control device for carrying out the simultaneous machining / recombining determination method according to the present invention, and FIG. 2 is a flow chart for explaining the simultaneous machining / editing method according to the present invention, FIGS. 5 (A) (B), 6 (A), (B) 7 (A), (B), 8 (A),
(B) and (C) are diagrams for explaining the simultaneous processing and editing method according to the present invention. 1,5 ... Display, 2,6 ... Keyboard, 3 ... Input control section, 4 ... Input data storage section, 7 ... Registration control section,
8 …… Registered data storage section, 9 …… Cutting speed check editing section, 10 …… Machining time check editing section, 11 …… Total horsepower check editing section, 12 …… Edited data storage section, 13,14,15 ……
work.

Claims (1)

[Claims] 1. In the suitability check of simultaneous machining data in simultaneous machining of four axes using automatic programming for a numerically controlled lathe and interactive manual data input, the workpiece obtained from machining data such as a workpiece shape and cutting conditions. Comparing the appropriate spindle rotation speed of each tool for simultaneous machining, and if there is a defect, change the conditions of simultaneous machining by integrating with the preceding and subsequent machining or dividing the machining site, then compare the machining times for simultaneous machining. If there is a problem, after changing the conditions for simultaneous machining by combining the previous and subsequent machining or dividing the machining site, compare the cutting power required for simultaneous machining with the rated power of the processing equipment, and use the cutting power as the rated power. On the other hand, if the load is excessive, by changing the cutting conditions such as the depth of cut, cutting speed, and feed of each tool to be processed simultaneously, the simultaneous processing can be corrected by modifying the simultaneous processing. A 4-axis simultaneous machining / editing method in automatic programming, which is characterized by re-editing machining data.