JP3283099B2 - Numerical controller with manufacturing cost recording function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical controller having a manufacturing cost recording function.

[0002]

2. Description of the Related Art In production activities in factories today, it is important to accurately grasp the production costs of products in order to clarify the degree of profit and loss and to determine the price of products. It has become. Cost calculation such as manufacturing cost is performed by a software package for personal computers in which all data necessary for calculation is input by an operator. FIG. 6 is a block diagram showing an example of a conventional manufacturing cost calculating device using a software package for a personal computer. Hereinafter, a procedure for calculating the manufacturing cost per lot based on this will be described.

[0003] The input interpreting section 2 receives an input K from the input device 1.
The DT is interpreted and sent to the cost element storage unit 3 as the material cost per lot LZH, the energizing time per lot LMT, the machine cost MKH, the manufacturing overhead cost SKH, and the labor cost JH of the worker. Here, the machine cost MKH, the manufacturing overhead cost SKH, and the labor cost JH of the worker are handled in units of (yen / hour). The cost element storage unit 3 stores the material cost per lot LZH, the energizing time per lot LM
T, the machine cost MKH, the manufacturing overhead cost SKH, and the labor cost JH of the worker are stored and sent to the cost calculation unit 4 as a cost calculation element LGEL per lot. When acquiring the cost calculation element LGEL per lot, the cost calculation unit 4 calculates the manufacturing cost LGD per lot based on this and sends it to the cost storage unit 5.

FIG. 7 is a flowchart showing a processing procedure in the cost calculator 4 of FIG. First, the cost LKH per lot is calculated by the following equation 1 using the energizing time LMT per lot and the machine cost MKH (step S201).

LKH = LMT * MKH (circle) Here, the unit of LMT is (hour), and the unit of MKH is (circle / hour). Next, labor cost per lot L
RH is calculated by the following equation 2 using the energizing time LMT per lot and the labor cost JH of the operator (step S202).

LRH = LMT * JH (yen) Here, the unit of LMT is (hour) and the unit of JH is (yen / hour). Next, the manufacturing direct cost LSTH per lot is calculated by calculating the cost LKH per lot calculated in step S201, the labor cost LRH per lot calculated in step S202, and the material cost LZH per lot.
Is calculated by using the following Expression 3 (Step S20)
3).

## EQU3 ## LSTH = LKH + LRH + LZH (yen)

Next, the manufacturing overhead cost LSKH per lot
Is the conduction time LMT per lot and the manufacturing overhead cost SK
H, and is calculated by the following Equation 4 (Step S20)
4).

LSKH = LMT * SKH (circle) Here, the unit of LMT is (hour), and the unit of SKH is (circle / hour). Finally, the manufacturing cost LGD per lot is calculated by the following equation 5 using the manufacturing direct cost per lot LSTH calculated in step S203 and the manufacturing overhead cost per lot LSKH calculated in step S204 (step S204). S205).

LGD = LSTH + LSKH (yen) The calculation of the manufacturing cost per lot is completed above. The cost storage unit 5 acquires the manufacturing cost LGD per lot,
This is stored inside the device.

[0006]

In the above-described conventional manufacturing cost calculating apparatus using a software package for a personal computer, since the environment for performing the cost calculation is separated from the manufacturing site, the workers actually engaged in the manufacturing. Cannot refer to the result of the manufacturing cost calculation during the operation, and it is difficult for the operator to grasp the profit and loss. In addition, there is a problem in that data grasped by the numerical controller for manufacturing the product must be re-input by the operator using the software for cost calculation. Further, conventionally, since the machining program and the manufacturing cost have not been managed together, a search means for referring to the manufacturing cost in the lot is required. Further, when there are a plurality of processing programs for processing the same lot having different efficiencies, there is a possibility that confusion such as a mistake in the manufacturing cost of the lot with that of another processing program is caused. The present invention has been made in view of the above circumstances, and an object of the present invention is to calculate a manufacturing cost on a numerical control device without performing useless data input, and a worker who actually engages in manufacturing A numerical control device with a manufacturing cost recording function that can immediately grasp the production cost at the manufacturing site and easily and clearly grasp the accurate relationship between the machining program and the production cost. Is to provide.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a numerical control apparatus having a manufacturing cost recording function, and an object of the present invention is to provide a material cost per lot for manufacturing, a cost for outsourcing, and a cost for processing all parts. Input means for inputting the number and the worker identification number, machine costs, manufacturing overhead costs, labor costs of a plurality of workers and the number of machines in charge are registered in advance,
Cost element registration means for selecting the labor cost and the number of machines in charge corresponding to the worker identification number from the input means, and the labor cost and the number of machines for the worker selected from the cost element registration means. Cost element conversion means for calculating the labor cost per machine, energization time counting means for counting the energization time from the machining start time in the lot, and counting the number of times the machining end data in the machining program has been acquired. Means for counting the number of parts to be machined, cost calculation condition registering means for pre-registering manufacturing cost calculation conditions, material costs per lot, outsourcing costs and total number of parts processed from the input means The cost and production overhead of the machine from the cost element registering means, the labor cost per machine from the cost element converting means, the energizing time from the energizing time counting means, Cost element storage means for storing the production cost calculation condition from the price calculation condition registration means as a cost element, and the number of parts processed from the part processing number counting means reaching the production cost calculation condition from the cost calculation condition registration means. Cost calculation command means for sending out a manufacturing cost calculation command when the number of parts processed per lot from the input means is equal to or equal to the total number of parts processed from the input means. Cost calculating means for reading out the cost element from the element storing means and calculating the manufacturing cost for each designated processing number; storing the manufacturing cost for each designated processing number from the cost calculating means in the manufacturing cost history; Cost storage means for calculating the cost, and a cost history output means for outputting the manufacturing cost history and the manufacturing cost per lot from the cost storage means to the machining program It is achieved by having a.

[0008]

According to the present invention, by automatically calculating the production cost while automatically counting the energizing time and the number of processed parts,
An operator who actually engages in manufacturing can immediately refer to the manufacturing cost at the manufacturing site.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a numerical controller having a manufacturing cost recording function according to the present invention. The input interpretation unit 12, the cost element storage unit 13, the cost calculation unit 14, and the cost storage unit 15 are respectively an input interpretation unit 2, a cost element storage unit 3, and a cost calculation unit 4 in FIG. And cost storage unit 5,
Since a new process is added, different reference numerals are given.
The program interpreting unit 22 stores one block of data P of the machining program stored in the machining program storage unit 21.
The DT is acquired, and the following processes (1) and (2) are performed. (1) When the data PDT of one block indicates the end of processing of M30, M02, etc., the processing end data EDT is sent to the component processing number counting unit 20. (2) One block of data PDT is converted to function generation data J
It is converted to DT and sent to the function generator 23. The function generator 23 acquires the function generation data JDT,
Driving device control unit 24 converts the data into driving device driving data MDT
To send to. The drive control unit 24 obtains drive drive data MDT and drives the drive 25.

An input interpreting unit 12 interprets an input KDT from the input device 1 and converts the input KDT into a material cost per lot LZH,
The outsourcing cost LGH per lot, the total number of parts processed per lot LBK, and the worker identification number SID are sent to the cost element storage unit 13 and the cost element registration unit 10. In the cost element registration unit 10, the machine cost MKH, the manufacturing overhead cost S
KH, labor cost JH of worker and number of machines in charge of worker M
D is registered in advance. Of these, labor costs J
H and the number of machines in charge of a worker MD are calculated from the labor costs of a plurality of workers and the number of machines in charge of the worker, which are registered in advance, in the worker identification number SID sent from the input interpretation unit 12. The corresponding one is selected. In the present embodiment, the material cost LZH per lot, the outsourced processing cost LGH per lot, the machine cost MKH, the manufacturing overhead cost SKH, and the labor cost JH of the worker are (yen / hour).
Shall be treated in units of The cost element conversion unit 11
Labor costs JH sent from cost element registration unit 10
Then, the number of machines in charge MD of the worker is acquired, the personnel cost MJH per machine is calculated by the following equation 6, and sent to the cost element storage unit 13.

[Equation 6] MJH = JH / MD (yen)

The energization time counting section 16 counts the energization time MT from the processing start time in the lot by using a calendar timer or the like in the numerical controller and sends it to the cost element storage section 13 and the cost calculation command section 18. Parts processing number counting unit 20
Counts the number of times the machining end data EDT sent from the machining program interpreting unit 22 has been acquired and sends it to the cost calculation command unit 18 as the number of component machining BK. The manufacturing cost calculation condition GSJ which is a condition for calculating the manufacturing cost is registered in the cost calculation condition registration unit 17 in advance. In the present embodiment, it is assumed that the manufacturing cost is calculated for each fixed number of processes, and the manufacturing cost calculation condition GSJ indicates the number of processes. The cost element storage unit 13 includes the input interpretation unit 12
The total number of parts processed per lot LBK, material cost per lot LZH and outsourced processing cost LGH per lot, machine cost MKH and manufacturing overhead cost SKH sent from the cost element registration unit 10, Element conversion unit 1
1 and the cost calculation condition GS sent from the cost calculation condition registration unit 17 per one machine.
J and the energizing time MT sent from the energizing time counting unit 16
Is stored.

The cost calculation command unit 18 sends a manufacturing cost calculation command GS to the cost calculation unit 14 when the following condition (1) or (2) is satisfied. (1) When the number of processed parts BK reaches a certain number of processing indicated by the manufacturing cost calculation condition GSJ (2) When the number of processed parts BK matches the total number of processed parts LBK per lot (per lot) (If the part processing is completed) Further, by referring to date data (not shown) of a calendar timer or the like inside the numerical controller, if the date is updated, a daily production cost calculation command DGS is sent to the cost calculation unit 14. . The cost calculator 14 performs the following processes (1) and (2). (1) When the manufacturing cost calculation command GS is received, the cost MKH of the machine and the manufacturing overhead SK from the cost element storage unit 13.
H, labor cost MJH per machine, total number of parts processed per lot LBK, material cost per lot LZH, outsourced processing cost LGH per lot, cost calculation condition GSJ, and manufacturing cost element GEL consisting of energizing time MT Based on this, the manufacturing cost GD for each designated processing number is calculated based on this, and sent to the cost storage unit 15. (2) When the daily production cost calculation command DGS is received, the production cost history GDR is acquired from the cost storage unit 15,
Based on this, the daily production cost DGD is calculated and sent to the cost storage unit 15. The cost history storage unit 15 performs the following processes (1), (2) and (3). (1) The manufacturing cost GD for each designated processing number sent from the cost calculating unit 14 is stored in the manufacturing cost history GDR and sent to the cost history output unit 19. (2) The production cost LGD per lot is calculated and sent to the cost history output unit 19. (3) Daily manufacturing cost D sent from the cost calculator 14
GD is stored. The cost history output unit 19 outputs the manufacturing cost history GDR and the manufacturing cost per lot LGD sent from the cost history storage unit 15 to the machining program.

FIGS. 2 and 3 are flowcharts showing the processing procedure for one day in the cost calculation command unit 18, cost calculation unit 14, cost storage unit 15, and cost history output unit 19 in FIG. FIG. 4 is a flowchart showing a detailed processing procedure of the manufacturing cost calculation processing (step S05) in FIG. Hereinafter, a calculation procedure for the manufacturing cost GD and the daily manufacturing cost DGD for each designated processing number will be described in detail with reference to these drawings. First, a lot number counter i for counting the number of lots processed in one day is initialized to 0 (step S01). Next, the number of parts processed BK,
A production cost calculation counter j for counting the energization time MT and the number of times the production cost is calculated is initialized to 0 (step S).
02). Thereafter, the number of parts processed BK is calculated by the number of parts processed counting section 20.
The energization time MT is counted by the energization time counter 16.

Next, the cost calculation command unit 18 obtains the number of processed parts BK and the energization time MT, and stores the number of processed parts BK in the part processed number comparison data BKC (step S0).
3). Next, the following determinations (1) and (2) for calculating the manufacturing cost are performed. (1) The difference between the number of processed parts BK sent from the number of processed parts counter 20 and the processed part number comparison data BKC is compared with a manufacturing cost calculation condition GSJ (in this embodiment, the number of processed parts is indicated). At this time, if Equation 7, it is assumed that the condition for calculating the manufacturing cost has been reached.

BK-BKC ≧ GSJ (2) It is determined whether all parts per lot have been processed. That is, the number of processed parts BK sent from the number of processed parts counter 20 is compared with the total number of processed parts LBK per lot. At this time, if Equation 8, it is assumed that the condition for calculating the manufacturing cost has been reached.

BK = LBK If either of the above equations 7 or 8 is satisfied, the processing from step S05 is continuously executed, and if not, the processing proceeds to the processing from step S12 (step S0).
4).

The cost calculator 14 starts calculating the manufacturing cost GD for each designated number of processes by acquiring the cost calculation command GS (step S05). Here, step S0
The procedure for calculating the manufacturing cost GD for each designated processing number in 5 will be described with reference to FIG. First, the cost KH for each designated number of machining is calculated using the following equation 9 by using the energizing time MT, the machine cost MKH, the outsourcing machining cost LGH per lot, the total number of parts processed per lot LBK, and the manufacturing cost calculation condition GSJ. (Step S101).

KH = MT * MKH + LGH * GSJ / LBK (yen) Here, the unit of MT is (hour), the unit of MKH is (yen / hour), and the unit of LGH is (yen / hour) And the unit of GSJ and LBK is (number). Next, a labor cost RH for each designated processing number is calculated by the following equation 10 using the energizing time MT and the personnel cost MJH per machine (step S102).

RH = MT * MJH (yen) Here, the unit of MT is (hour), and the unit of MJH is (yen / hour).

Next, a material cost ZH for each designated processing number is calculated by the following equation 11 using the material cost per lot LZH, the total number of parts processed per lot LBK, and the manufacturing cost calculation condition GSJ (step). S103).

ZH = LZH * GSJ / LBK (circle) Here, the unit of LZH is (circle), and GSJ and LB
The unit of K is (pieces). Next, the manufacturing direct cost SZTH for each designated processing number is calculated by calculating the cost KH for each designated processing number calculated in step S101, the labor cost RH for each designated processing number calculated in step S102, and the designation calculated in step S103. Using the material cost ZH for each processing number, it is calculated by the following equation 12 (step S104).

SZTH = KH + RH + ZH (circle) Next, the manufacturing overhead cost SZKH for each designated processing number is calculated by the following Expression 13 using the manufacturing overhead cost SKH and the conduction time MT (step S105).

SZKH = MT * SKH (yen) Here, the unit of MT is (hour), and the unit of SKH is (yen / hour). Lastly, the manufacturing cost GD for each of the designated machining numbers is calculated using the manufacturing direct cost SZTH for each of the designated machining numbers calculated in step S104 and the production overhead cost SZKH for each of the designated machining numbers calculated in step S105. It is calculated by Expression 14 (Step S106).

GD = SZTH + SZKH (yen) The calculation of the manufacturing cost GD for each designated processing number is completed above, and the process returns to FIG.

Here, in the calculation procedure of the manufacturing cost, the outsourcing processing cost LGH per lot is included in the cost in order to strictly handle the outsourcing processing cost. However, this may be included in the manufacturing overhead cost. . Next, in order to store the manufacturing cost GD for each designated processing number in the control device, this is stored as a manufacturing cost history GDR (step S0).
6). Here, in the present embodiment, the manufacturing cost history GD
R has a two-dimensional array structure having a lot number counter i and a manufacturing cost calculation counter j as elements. Next, 1 is added to the manufacturing cost calculation counter j (step S07). Next, it is determined whether the processing of all parts per lot has been completed. That is, in the determination of step S04, when the production cost is calculated due to the completion of the processing of all parts per lot, the processing of step S09 is continuously executed, otherwise, the processing of step S03 is performed. Return (step S08).

Next, the manufacturing cost LGD per lot is calculated. In the present embodiment, the manufacturing cost LGD per lot has an array structure having the lot number counter i as an element, and is calculated by the following equation 15 as the sum of the manufacturing cost history GDR calculated in step S06. (Step S
09).

(15) LGD (i) = GDR (i, 0) + GDR (i, 1) +. . . + GDR (i, jmax) Here, i indicates an arbitrary lot, and jmax is a value obtained by subtracting 1 from the number of times of manufacturing cost calculation. Next, the cost history output unit 19 records the manufacturing cost GD for each designated processing number calculated in step S05 and the manufacturing cost per lot LGD calculated in step S09 in the processing program (step S10). Here, an example of a recording method for the machining program will be described with reference to FIG.

The machining program starts from 5-1 and
End with 2. The description of the machining programs 5-1 to 5-2 is omitted. Next, the date when the manufacturing cost was calculated is 5-3, and the machine number is 5-4.
, The operator number is recorded in each of 5-5. Next, the cost calculation conditions are recorded in 5-6. here,
5-6 shows that the condition that the calculation of the manufacturing cost is performed every time 20 pieces are processed. next,
The calculated production costs are recorded from 5-7 to 5-8. Here, 5-7 to 5-8 show that the manufacturing cost was calculated six times under the calculation conditions of 4-6. Next, the manufacturing cost per lot is recorded in 5-9. In this embodiment, the date, machine number, and operator number are recorded together with the manufacturing cost history, but these data may be omitted as appropriate. With the above, the recording to the machining program is completed, and the process returns to FIG.

1 is added to the lot number counter i (step S11). Then, the process returns to step S02, and thereafter, the same process is performed for the next lot. If the condition for calculating the manufacturing cost is not satisfied in step S04, it is determined whether the condition for calculating the daily manufacturing cost is satisfied. In this embodiment, referring to the date data (not shown) in the numerical controller, if the date has been updated, the process of step S13 is performed assuming that the condition has been reached, and if not, the process of step S13 is executed.
The process proceeds to the process 14 (step S12). Cost calculator 14
By acquiring the daily cost calculation instruction DGS,
The calculation of the daily cost DGD is started (step S1).
3). Here, a procedure for calculating the daily cost DGD in the present embodiment will be described. First, the manufacturing cost history GDR is acquired from the cost storage unit 15. The daily cost DGD is the following formula 1 as the sum of all acquired manufacturing cost history GDRs.
6 is calculated.

DGD = GDR (0,0) + GDR (1,0) +. . . + GDR (imax, 0) + GDR (0, 1) + GDR (1, 1) +. . . + GDR (imax, 1) +. . . + GDR (0, jmax) + GDR (1, jmax) +. . . + GDR (imax, jmax) Here, imax is a value obtained by subtracting 1 from the number of lots.
jmax is a value obtained by subtracting 1 from the number of times the manufacturing cost is calculated.

The calculated daily cost DGD is stored in the cost storage 1
5, and the process for one day is completed. To store the history of manufacturing costs over two days or more, the cost storage unit 1
This is made possible by preparing a plurality of sets of the manufacturing cost history GDR, the manufacturing cost LGD per lot, and the daily manufacturing cost DGD stored in step 5. If the condition for calculating the daily cost is not satisfied in step S12, the number of processed parts BK and the energizing time MT are newly acquired, the process returns to step S04, and the processes from step S04 are repeated. (Step S14). In this embodiment, the machine cost MKH, the manufacturing overhead cost SKH, and the personnel cost M
JH was registered in units of (yen / hour), but means for registering these in units of (yen / month), the current energizing time per month so far and the work per month so far The following methods (1) and (2) for preparing means for counting the working hours of a worker can be considered. (1) The cost MKH of the machine in the unit of (yen / hour) is obtained by dividing the cost of the machine and the manufacturing overhead cost registered in the unit of (yen / month) by the energizing time per month so far.
And the manufacturing overhead cost SKH. (2) Calculate the labor cost MJH in the unit of (yen / hour) by dividing the labor cost registered in the unit of (yen / month) by the working hours of the worker per month so far. . As a manufacturing cost calculation condition, in addition to the fixed number of parts processed and the total number of parts processed per lot used in the present embodiment, a method of using a constant energizing time as the manufacturing cost calculation condition can be considered. Further, the manufacturing cost may be calculated using one or more of these conditions. Furthermore, these are recorded in a machining program as a means for storing manufacturing cost elements in the cost element storage unit 13,
The manufacturing cost element may be stored when the machining program is read. The above is the embodiment of the present invention.

[0022]

As described above, according to the numerical controller having the manufacturing cost recording function of the present invention, the manufacturing cost is calculated on the numerical controller, and the workers actually engaged in the manufacturing work at the manufacturing site. This makes it possible to immediately refer to the above-mentioned production costs, and to clearly recognize the profit and loss at the production site. Further, an accurate relationship between the processing program and the manufacturing cost can be understood, which can be used for improving the manufacturing method and the processing program.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a configuration of a numerical controller having a manufacturing cost recording function according to the present invention.

FIG. 2 is a first flowchart illustrating a manufacturing cost calculation process of the apparatus of the present invention.

FIG. 3 is a second flowchart illustrating a manufacturing cost calculation process of the apparatus of the present invention.

FIG. 4 is a third flowchart showing a manufacturing cost calculation process of the apparatus of the present invention.

FIG. 5 is a diagram showing an example of recording a manufacturing cost history of a device of the present invention in a machining program.

FIG. 6 is a block diagram illustrating an example of a conventional manufacturing cost calculation device.

FIG. 7 is a flowchart showing a manufacturing cost calculation process of the conventional apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cost element registration part 11 Cost element conversion part 12 Input interpretation part 13 Cost element storage part 14 Cost calculation part 15 Cost storage part 16 Energization time counting part 17 Cost calculation condition registration part 18 Cost calculation instruction part 19 Cost history output part 20 Parts Machining number counting section 21 machining program storage section 22 program interpretation section 23 function generation section 24 drive control section 25 drive

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-35750 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G05B 15/00-15/02 G06F 17 / 60

Claims (2)

(57) [Claims] 1. A numerical controller for controlling production of a product in accordance with a processing program, comprising: input means for inputting a material cost, a subcontract processing cost, a total number of processed parts, and an operator identification number per lot of the production; Expenses, manufacturing overheads, labor costs of a plurality of workers and the number of machines in charge are registered in advance, and a cost element for selecting the labor cost of the workers and the number of machines in charge corresponding to the worker identification number from the input means. Registration means, cost element conversion means for calculating a labor cost per machine from the labor cost of the worker selected from the cost element registration means and the number of machines in charge, and an energizing time from a machining start time in the lot Energization time counting means for counting the number of times the machining end data in the machining program has been acquired and component machining number counting means for counting the number of component machining times; Cost calculation condition registration means for pre-registering conditions, material cost per lot, outsourcing processing cost and total number of parts processed from the input means, machine cost and production overhead cost from the cost element registration means, Cost element storage means for storing, as cost elements, labor costs per machine from the cost element conversion means, energization time from the energization time counting means, and manufacturing cost calculation conditions from the cost calculation condition registration means; When the number of processed parts from the number of processed parts counting means reaches the production cost calculation condition from the cost calculation condition registration means or when the number of processed parts coincides with the total number of processed parts per lot from the input means, the manufacturing cost calculation instruction is issued. A cost calculation command means for sending out, and upon receiving a production cost calculation command from the cost calculation command means, reads out cost elements from the cost element storage means and Cost calculating means for calculating the manufacturing cost, storing the manufacturing cost for each designated number of processing from the cost calculating means in the manufacturing cost history, and cost storing means for calculating the manufacturing cost per lot; and And a cost history output means for outputting the manufacturing cost history and the manufacturing cost per lot to the machining program. 2. The cost calculation command means refers to date data inside the numerical controller, sends out a daily production cost calculation command when the date is updated, and the cost calculation means outputs the cost calculation command. When a daily manufacturing cost calculation command is received from the command means, the manufacturing cost history is read from the cost storage means to calculate the daily manufacturing cost, and the cost storage means is converted to the daily cost from the cost calculating means. 2. The manufacturing cost according to claim 1, wherein the manufacturing cost is stored in a manufacturing cost history.
Mounting of the numerical controller.