JPH08215785A - Tool control system for parts former - Google Patents

Abstract

PURPOSE: To prevent the damage of a tool during operating a parts former from happening by individually controlling the accumulated number of shots in each tool even in the case of commonly using a same tool to two or more pieces of products, in the parts former heading-forming a blank into a prescribed shape by using the tool, such as die, punch. CONSTITUTION: Number of heading shots in the parts formers 4...4 is inputted into a computer 1 through a link controller 3, and accumulated in each tool set to the parts formers 4...4. Further, when the accumulated number of shots of the tool set to the stop reaches a prescribed average accumulated number of shots, the parts former 4 setting the tool is made to be stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool management system for a part former such as a multi-stage forging machine, and mainly to life management of various forging tools such as dies and punches used in the part former.

[0002]

2. Description of the Related Art As a part former used for molding various parts such as bolts and nuts, for example, a multistage forging machine is known. This forging machine is generally composed of a plurality of forging dies, which are arranged in parallel on the machine base, ranging from coarse to fine, and the same number of forging punches that are arranged to face these forging dies. At the same time, the material supplied from one side of the machine base is sequentially transferred to the forging dies for rough to fine, and the material is stepwise forged by the forging punches that are arranged to face each forging die. Although it is configured to continuously mold shaped products, forging tools such as dies and punches used in this type of forging machine, when used in excess of a predetermined number of durable shots, Due to wear or damage, the probability of deteriorating the finish of the final product or stopping the machine increases.

Particularly, in a multi-stage forging machine provided with forging stations No. 1 to No. 4 from coarse to fine, for example, if the forging punch forming the No. 1 station is used exceeding the number of useful shots. If it is damaged, not only the forging dies arranged to face each other will be damaged, but also the forging punches and forging dies forming the subsequent Nos. 2 to 4 stations will be sequentially damaged due to the damage, resulting in a great loss. Will be generated.

Therefore, the cumulative number of shots for each tool is individually accumulated, and when the cumulative number of shots reaches a predetermined experientially determined number of durable shots, the parts former is stopped and the tool is replaced. It is thought to do.

[0005]

However, it has been conventionally difficult to precisely manage the cumulative number of shots of the forging tool for the following reasons.

That is, in general, when a predetermined number of certain products are manufactured, the parts former is so-called step change to replace the forging tools and then sequentially manufacture products of different shapes. In such a case, in this type of parts former, the degree of deterioration of the forging tool is not uniform, and even if the forging tool is renewed at the time of changeover work, before performing the next changeover work. There may be a tool whose cumulative shot number reaches the durable shot number. In such a case, the tool must be replaced with a new one. Moreover, since the same forging tool may be used for two or more products, it is difficult to precisely manage the cumulative number of shots of the forging tool, and the forging tool exceeds the number of durable shots. In anticipation of being used as a tool, the forging tool could have an unforeseen event of damage during operation of the part former.

Therefore, the present invention is a parts former for forming a material into a predetermined shape by using a tool such as a die or a punch, even when the same tool is used for two or more products. An object of the present invention is to provide a tool management system capable of individually managing the cumulative number of shots for each tool and thereby preventing the tool from being damaged during the operation of the part former.

[0008]

That is, the invention according to the present application is a tool management system of a part former for forging a material into a predetermined shape by using a forging tool such as a die or a punch. The forging shot number detecting means for detecting the number of forging shots by the marker, the cumulative shot number storing means for storing the cumulative shot number of each tool assigned to each tool, and the tool set in the parts former are designated. Tool specifying means, stop shot number setting means for setting the number of stop shots relating to a specific tool, and the forging shot number detected by the forging shot number detecting means in association with the specified tool designated by the tool specifying means. In addition to accumulating in the storage means, the number of stop shots for the specific tool set by the number of stop shots setting means and the above A control means for comparing the cumulative number of shots accumulated in the storage means and stopping the operation of the part former in which the tool is set when the cumulative number of shots exceeds the number of stopped shots is provided. And

[0009]

According to the above construction, the number of forging shots of the part former detected by the forging shot number detecting means is stored in the cumulative shot number storing means in association with the designated tool designated by the tool designating means. Therefore, the cumulative shot number of each forging tool set in the parts former can be precisely managed. Then, for example, if a tool with a short life is selected as a specific tool and the number of empirically obtained actual shots is set as the number of stopped shots, when the cumulative number of shots of the tool exceeds the number of stopped shots. Therefore, the operation of the part former is stopped, so that the tool is prevented from being damaged during the operation of the part former.

[0010]

Embodiments of the present invention will be described below.

First, the system configuration of the tool management system according to the present invention will be described with reference to FIG. 1. In this system, an operation unit 1a for inputting various commands and numerical values and a display unit 1b for displaying various data are provided. And a printer 2 for printing out various documents is connected to the computer 1. Then, the link controller 3 connected to the computer 1 and a plurality of (six in the case of the example) parts formers 4 ... 4 (4 ₁ to 4 ₆ ) exchange signals with each other. There is. In this case, the parts former 4 outputs, for example, a forging signal for each cycle and an identification code indicating the operating state at that time. In this case, as the identification code indicating the operating state, for example, in addition to the running state or the normal stop state, a material exchange, a tool exchange, or a stop for a stage change is provided in some cases, and these The identification code is automatically set by a sensor or the like, or manually by an operator operating the operation unit 1a.

Meanwhile, the control signal for the part former ₄₁ to ₆ from the link controller 3 are outputted respectively.

Next, the operation control of the parts formers 4 ... 4 performed by the computer 1 will be described with reference to the flow charts of FIGS.

That is, the computer 1 first clears the machine number M to 0 in step S1. Here, the machine number M indicates a numerical value assigned to each of the parts formers 4 ... For example, when the machine number M is "1", the first machine is shown, and when the machine number M is "6", the sixth machine is shown.

Next, the computer 1 proceeds to step S2, increments the machine number M, and then executes step S2.
At 3, it is determined whether the machine number M is larger than a predetermined value α (for example, 18). Then, when it is determined that the machine number M is not larger than the predetermined value α, the process proceeds to step S4, it is determined whether or not to perform the stage change based on the identification code fetched via the link controller 3, and if it is not the stage change. When it is determined, the process proceeds to step S5 and it is determined whether or not it is a predetermined scheduled update. In this case, the computer 1, for example, determines that the time management program executed independently indicates a scheduled update when the date is changed, and proceeds to step S6 to add the previous value of the total production number Nt to the daily production number Nd. In addition, in step S7, after setting the daily production number Nd to the updated production number Nr,
In step S8, the daily production number Nd is cleared to zero.

On the other hand, the computer 1 uses the above step S4.
If it is determined in step S that there is a stage change, step S
After shifting to 9, the total production number Nt is cleared to 0, the step S7 is executed to set the daily production number Nd to the updated production number Nr, and then the daily production number Nd is cleared to 0 in step S8.

When it is determined in step S4 that the computer 1 is neither the stage change nor the step S5, the computer 1 determines that the computer 1 is not performing the regular update.
8 is skipped and step S10 is executed to determine whether the forced stop command is input. When it is determined that the forced stop command is input, the process proceeds to step S11 and the parts former 4 is operated via the link controller 3. After outputting the stop signal to, the process returns to step S2 to increment the machine number M. In this case, for example, it is assumed that the forcible stop instruction for Unit 1 is input from the operation unit 1a, part former 4 ₁ stop signal machine number M is for Unit 1 indicating "1" via the link controller 3
Will be output to.

The computer 1 uses the above step S.
When it is determined that the machine number M is larger than the predetermined value α in 3, the process returns to step S1 and the machine number M is set to 0 again.
After clearing to, execute the following steps.

The computer 1 also executes the above step S.
When it is determined in 10 that the forced stop command has not been input, the process proceeds to step S12, and this time it is determined whether or not the timer is set. In this case, if the value of the machine number M is "3", it is determined whether or not the timer for automatically stopping the No. 3 machine is set. When the computer 1 determines that the timer has been set, it proceeds to step S13 and determines whether or not the timer has timed up. If it determines that the timer has not timed up, it proceeds to step S14 in the flowchart of FIG. A predetermined counter fetching process is executed, and if the timer is not set in step S12, step S13 is skipped and step S1 is executed.
4, the counter fetching process is executed. And
When the computer 1 determines in step S13 that the timer has timed out, step S11
Then, a stop signal is output to the parts former 4 via the link controller 3. In this case, for example, if a timer for 2 hours is set for Unit 3, the operation of Unit 3 will be automatically stopped when 2 hours have elapsed after the timer was set.

The counter fetching process executed in step S14 will now be described. The counter fetching process is performed as follows according to the flowchart of FIG. 4, for example.

That is, the computer 1 executes step S
At 31, the count number Nc per predetermined time accumulated in the link controller 3 in response to the forging signal from the parts former 4 is fetched. In this case, when the value of the machine number M is "1", the count number Nc indicating the number of forging shots of the first machine is fetched. Then, the computer 1 proceeds to step S32, and replaces the value obtained by adding the count number Nc to the previous value of the daily production number Nd with the current value of the daily production number Nd. In this case, for example, on the screen of the display unit 1a composed of a liquid crystal display or the like, as shown in FIG.
The production control table that displays the operating status of the product code, product name, the number of daily production, the last update date and time, and the number of production updates at that time is displayed. It is updated in real time.

Subsequently, the computer 1 clears the tool number K to 0 in step S33, and then executes step S33.
34 is executed to increment the tool number K. Then, in step S35, the tool number K is a predetermined value β (for example,
60), and if not, the process proceeds to step S36 to determine whether the tool indicated by the tool number K is a storage tool.

Here, a tool box corresponding to each part former 4 is virtually set in the memory space of the computer 1, and each part former 4 is also set.
The tools required to process a product using are registered in the tool box with a maximum limit of 60 points. In that case, the tools registered in the tool box are roughly divided into the tools actually used for machining the product and the storage tools stored in the tool box, and the operator labels them by tool number. It has become.

When the computer 1 determines in step S36 that the tool indicated by the tool number K is not the storage tool, the computer 1 proceeds to step S37 and sets the count value fetched in step S31 to the previous value of the cumulative shot number Ns of the tool. The value obtained by adding Nc is replaced with the current value of the cumulative shot number Ns, and then the process returns to step S34 to increment the tool number K while the above step S36 is performed.
When it is determined that the tool indicated by the tool number K is the storage tool in, the process immediately returns to step S34. In this way, the cumulative shot number Nc of the tools used is accumulated according to the number of forging shots of the part former 4.

Then, the computer 1 executes the above step S
When it is determined that the tool number K is larger than the predetermined value β in 35, the process exits from the counter loading process and returns to the flowchart of FIG. 3, and step S15 is executed to check whether the production target value No is set. judge. And
When it is determined that the production target value No is set,
In step S16, the total production number Nt is the production target value No.
If the total production number Nt matches the production target value No, the process proceeds to step S17 and a stop signal is output to the parts former 4 via the link controller 3, and then the flowchart of FIG. Return to step S2.
Thus, for example, if 20,000 pieces are set as the production target value No for the first machine, the first machine will be stopped when the total production number Nt reaches 20,000 pieces.

The computer 1 also executes the above step S.
When it is determined in 16 that the total production number Nt does not match the production target value No, or when it is determined in step S15 that the production target value No is not set, the process proceeds to step S20 and the tool number K is set to 0. Then, in step S19, the tool number K is incremented, and it is determined in step S14 whether the tool number K is larger than the predetermined value β. When it is determined that the tool number K is not larger than the predetermined value β,
In step S21, it is determined whether or not stop setting has been made for the tool indicated by the tool number K. If stop setting has been made, step S22 follows and the cumulative shot number Ns of the tool is a predetermined average. Cumulative number of shots N
It is determined whether or not it is larger than av. In this case, in this embodiment, as the value of the average cumulative shot number Nav, the actual shot number obtained empirically at the start of operation is set, and after the start of operation, The value of the average cumulative shot number Nav is learned and corrected based on the actual shot number.

When the computer 1 determines in step S22 that the cumulative shot number Ns is larger than the average cumulative shot number Nav, it proceeds to step S23 and outputs a stop signal to the parts former 4 via the link controller 3. , And returns to step S2 in the flowchart of FIG. Therefore, for example, if a tool having a small number of durable shots is selected as the stop tool, the parts former 4 will automatically stop before the tool is damaged.

Next, the learning process of the average cumulative shot number, which is a characteristic part of this embodiment, will be described. Specifically, this learning process is performed as follows according to the flowchart of FIG. Note that this learning process is performed at the stage change.

That is, the computer 1 first sets 1 as the value of the tool number K in step T1, and then proceeds to step T2 to determine whether or not the tool corresponding to the tool number K is a storage tool and store it. Step T if not a tool
A value obtained by dividing the number Nd of Nissans by the number Ne of replacement tools in 3
That is, the actual shot number is set as the actual data D ₆ . In this case, the replacement tools include tools damaged during the operation of the part former 4 and tools replaced when the cumulative shot number reaches a predetermined average cumulative shot number.

Next, the computer 1 executes step T4.
The total sum of the performance data D _{1 to} D ₆ is calculated at T5, and then the total value S is divided by 6 to obtain a first calculated value A ₁ . That is, the arithmetic mean of the actual data D _{1 to} D ₆ is performed. Here, as the initial values of the performance data D _{1 to} D ₅ ,
Past performance data is preset as dummy data.

Then, the computer 1 executes the step T
6, T7 are executed, and the value obtained by adding the average cumulative shot number Nav to the first calculated value A ₁ obtained in step T5 is set as the second calculated value A _2, and then this second calculated value A ₂ is set. The value divided by 2 is newly set as the average cumulative shot number Nav. As a result, the average cumulative shot number Nav is updated by reflecting the actual shot number, and the accuracy increases each time the learning process is performed.

Next, the computer 1 executes step T8 to set the value of the subscript number i of the above-mentioned result data to 1, and then proceeds to step T6 to set the value of the result data D _{i + 1} to the result data D _i. Replace with. That is, replacing the value of the actual data D ₂ to the actual data D _1. Next, the computer 1 proceeds to step T9, increments the subscript number i, determines whether the number i is equal to 6 in step T10, and repeats the loop processing of steps T8 to T10 until YES is determined. To execute. As a result, the actual result data D ₂ becomes the actual result data D ₁ and the actual result data D ₃
Is the actual data D ₂ , and the actual data D ₄ is the actual data D
₃ , actual data D ₅ is actual data D ₄ , actual data D ₆
Are sequentially replaced with the actual data D ₅ .

When the computer 1 determines in step T10 that the subscript number i is equal to 6, the computer 1 exits from the loop processing and moves to step T11 where the tool number K is incremented and then step T12 is executed to execute the tool number. It is determined whether K is larger than the predetermined value β, and if the tool number K is not larger than the predetermined value β, the process returns to step T2, and the same processing is performed on the tool with the tool number K that is determined to be the storage tool. By doing so, the average cumulative shot number Nav is sequentially updated by reflecting the actual shot number.

The computer 1 also executes the above step T2.
When it is determined that the tool corresponding to the tool number K is the storage tool in step S11, steps T3 to T10 are skipped, the process proceeds to step T11, and the tool number K is incremented.

Then, the computer 1 executes the above step T.
When it is determined in 12 that the tool number K is larger than the predetermined value β, the learning process ends.

In this way, the average cumulative shot number Nav for stopping the part former 4 is updated by reflecting the actual number of shots. Mar 4 will definitely stop.

Here, the above-mentioned scheduled update will be described. For example, assuming that the scheduled update is performed at 00:00:00 on February 6, 1995, as shown in FIG. The number of daily production in the display column for each machine is set to 0, the numerical value indicating the number of daily production at that time is displayed in the column of updated production, and the updated date and time are displayed in the column of update date and time. It will be.

In this case, the memory of the computer 1 is provided with an area for 1,000 days for each parts former in order to store the data displayed in the production control table, and the latest data is The data is stored in the 000th area and is moved up in order from the oldest one.

It should be noted that the updating process is also performed at the stage change. In that case, the updating process is performed only for the part former 4 whose stage is changed.

If, for example, the next screen is selected from the screen displaying the production control table, the update record table shown in FIG. 8 is called, and the update date and time and the number of productions are displayed in order from the latest for each part former. Will be done. In that case, every time the update process is performed, the data of number 1 is sequentially moved to the place of number 2, and the data of number 2 is sequentially moved to the place of number 3.

If a predetermined procedure is performed while the production control table is displayed on the screen of the display unit 1a, a production schedule for each day is printed out from the printer 2 as shown in FIG. Will be.

As described above, since the daily production quantity, the update date and time, etc. can be recorded for each part former 4 ... 4 for 1000 days, it is possible to easily investigate the past production quantity. There is.

Further, in this embodiment, the operating states of the parts formers 4 ... 4 are recorded and displayed as follows.

First, the operating states of the parts formers 4 ... 4 are accumulated as follows in accordance with the flowchart of FIG.

That is, the computer 1 executes step U1.
After clearing the machine number M to 0, proceed to step U2 to increment the machine number M, and then to step U3.
Then, it is determined whether the machine number M is larger than the predetermined value α. When it is determined that the machine number M is not larger than the predetermined value α, the computer 1 proceeds to step U4 to fetch the identification code C via the link controller 3 and determines whether the date is changed in step U5. . When it is determined that the date has been changed, step U6
Is executed to set the count value J to 1, and in steps U7 and U8, the identification code C and the time at that time are stored in the memory.

Here, in the memory of the computer 1, as shown in FIG. 11, for example, a plurality of times (for example, 30) and identification labels corresponding to the count value J can be stored for each parts former 4. If the storage file is set and the machine number M indicates "1", for example, 1
The time and the identification code C are stored in each area where the count value J in the column corresponds to 1. In that case, the time is converted into a minute value and stored.

On the other hand, when the computer determines in step U5 that the date has not been changed, step U9
Is executed to determine whether the current value of the identification code C is equal to the previous value, and if YES is determined, step U10
Is executed to update the time, and when it is determined to be NO, step U11 is executed to increment the count value J and then steps U7 and U8 are executed to store the identification code C and the time at that time in the memory. Remember.

In this way, each part former 4 ...
Computer 1 has 4 operating states with time as a parameter
Will be stored in the memory. Then, when the date is changed next time, the next storage file is used and the operating states of the respective parts formers 4 ... 4 are accumulated.

Parts former 4 stored in the memory ...
The operating state of No. 4 is displayed on the screen of the display unit 1a as follows, for example.

Now, assuming that the operating state from 0:00 to 23:59 is displayed with time on the X axis and machine number on the Y axis, for example, the last bit assigned for time display on the X axis is displayed. Maximum time T at which position Bm composes one day
This corresponds to m (= 1440).

Then, the temporary bit position A is calculated by applying the time T stored in the storage file to the following relational expression (1).

A = T × Bm / Tm (1) Then, a value obtained by applying the provisional bit position A to the following relational expression (2) is set as a bit position B.

B = A + 1 (2) These operations are sequentially executed from the beginning of the count value J for each of the part formers 4 ... 4 in the storage file.

Then, the X coordinate is determined with A as the end position of each block and B as the start position of the next block, and the upper and lower Y coordinates of each block corresponding to the machine number are determined. By setting a predetermined display pattern on the display unit 1a and outputting the display pattern to the display unit 1a according to a predetermined routine, the operating states of the respective parts formers 4 ... Will be. In the example shown in the figure, the parts former 4 is in a dot pattern during operation, the normal stop state is a colorless pattern, and the irregular stop state such as material exchange is a hatching pattern different for each stop reason. It is supposed to be displayed. Of course, if color display is possible, the color may be changed for each identification code.

As described above, since the operating states of the part formers 4 ... 4 are displayed graphically over time, which part former 4 is stopped for what reason and for how long. It is possible to know at a glance what has been done. Moreover, as mentioned above, 1
Since the daily data is accumulated, it is possible to trace the operation status of the part formers 4 ... 4 retroactively.

[0056]

As described above, according to the present invention, the cumulative shot number storage means correlates the number of forging shots of the part former detected by the forging shot number detecting means with the designated tool designated by the tool designating means. Therefore, the cumulative number of shots of the individual forging tools set in the part former can be precisely managed. Then, for example, if a tool with a short life is selected as a specific tool and the number of empirically obtained actual shots is set as the number of stopped shots, when the cumulative number of shots of the tool exceeds the number of stopped shots. Therefore, the operation of the part former is stopped, so that the tool is prevented from being damaged during the operation of the part former.

[Brief description of drawings]

FIG. 1 is a block diagram showing a tool management system according to the present invention.

FIG. 2 is a flowchart showing a part of operation control of a parts former performed by a computer.

FIG. 3 is a flowchart showing a part of operation control of the parts former.

FIG. 4 is a flowchart showing a subroutine of a counter loading process.

FIG. 5 is a diagram showing a part of a production management table at a normal time.

FIG. 6 is a flowchart showing a learning process of an average cumulative shot number.

FIG. 7 is a diagram showing a part of a production management table at the time of updating.

FIG. 8 is a diagram showing a part of an update recording table.

FIG. 9 is a diagram showing an example of output of daily production numbers.

FIG. 10 is a flowchart showing an operation state recording process of a parts former.

FIG. 11 is a memory configuration diagram of a recording table for recording the operating state of the parts former.

FIG. 12 is a diagram showing a part of a display example of an operating state of a parts former.

[Explanation of symbols]

 1 Computer 1a Operation part 3 Link controller 4 Parts former

Claims (1)

[Claims] 1. A tool management system for a parts former for forming a material into a predetermined shape by using a forging tool such as a die or a punch, wherein the number of forging shots is detected by the number of forging shots by the parts former. Means, a cumulative shot number storage means for storing the cumulative shot number of each tool assigned to each tool, a tool designating means for designating the tool set in the parts former, and a stop shot number for a specific tool. The stop shot number setting means to be set and the forging shot number detected by the forging shot number detecting means are stored in the storage means in association with the designated tool designated by the tool designating means, respectively, and the number of stopped shots is stored. The number of shots stopped for the specific tool set by the setting means and the cumulative number of shots accumulated in the storage means And a control means for stopping the operation of the part former in which the tool is set when the cumulative number of shots exceeds the number of stopped shots. system.