CN110705116B - Simulation method for replacing clamp in machining production line - Google Patents
Simulation method for replacing clamp in machining production line Download PDFInfo
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- CN110705116B CN110705116B CN201910961538.1A CN201910961538A CN110705116B CN 110705116 B CN110705116 B CN 110705116B CN 201910961538 A CN201910961538 A CN 201910961538A CN 110705116 B CN110705116 B CN 110705116B
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Abstract
The invention relates to a simulation method for replacing a clamp in a machining production line, which constructs a simulation model according to a preset production line layout scheme, sets manufacturing resource attributes and realizes consistency of the simulation model and a real system. The clamps for clamping the parts are stored in the clamp library, and when the type of the parts to be processed is changed, an operator conveys the currently used clamps back to the clamp library, and the required clamps are extracted from the clamp library and are mounted on a machine tool. In the production line simulation model, the control logic of the simulation system is designed, so that an operator can better take the consistency of the logic of the clamp and the actual situation, the consistency of simulation quality and simulation animation and the actual situation is emphasized in detail, the running process of the actual manufacturing system can be restored to the maximum extent, and the confidence of the simulation model is improved.
Description
Technical Field
The invention belongs to the field of machining production, and particularly relates to a simulation method for replacing a clamp in a machining production line.
Background
Under the normal condition, a workshop uses a discrete event system simulation technology to build a simulation model of a workshop production line before production, simulate the actual production flow of the workshop, evaluate the conditions of yield, utilization rate, personnel configuration and the like of each device, and avoid fund waste or insufficient system capacity caused by blind decision-making when the workshop is put into production;
in actual workshop production line production, the clamp replacement process is replaced by setting preset time, the clamp replacement process of an operator is ambiguous, a simulation model cannot simulate the actual production process, the simulation result is inaccurate, and the yield, the utilization rate and the personnel configuration of each device cannot be accurately estimated and evaluated.
Disclosure of Invention
The invention provides a simulation method for replacing a clamp in a machining production line, which aims to solve the technical problems that: in the past manufacturing system simulation, the problem of the machine tool clamp changing process is mostly not considered.
In order to solve the technical problems, the invention provides a simulation method for replacing a clamp in a machining production line, which is characterized by comprising the following steps:
step one, constructing a simulation model according to a preset production line layout scheme: the manufacturing resources of the simulation model comprise a temporary storage area, a clamp library, two trays, three machine tools and operators;
step two, setting manufacturing resource attributes: setting attribute parameters of each manufacturing resource according to the collected data of each manufacturing resource;
step three, realizing the consistency of the simulation model and the reality system by the following method:
in the initial state of the simulation model, prohibiting parts from entering a first machine tool and a second machine tool, creating empty data tables 1 and 2, setting the values of the tables 1 and 2 to 0, after receiving a command for machining the parts, an operator taking a clamp from a clamp library and mounting the clamp on a first tray, simultaneously, after receiving the command for mounting the clamp, the first machine tool mounts the parts from a temporary storage area to the first machine tool for machining, the first machine tool only machines one part, and the type value X of the parts is recorded in the table 1; when the parts are processed and leave the first machine tool, the unprocessed parts remained in the temporary storage area sequentially enter a third machine tool, the type value Y of the entered parts is recorded in the table 2, and the type values of the table 1 and the table 2 are obtained and compared:
if the value X of Table 1 is equal to the value Y of Table 2, i.e. the last machined part is of the same type as the part to be machined, the unmachined part is entered into a second machine tool for machining; refreshing the values of table 2 to the values of table 1 as the part leaves the third machine tool to compare the values of table 1 and table 2 as the next part enters the third machine tool;
when the value X of table 1 is not equal to the value Y of table 2, the operator transfers the jig from the first tray back to the jig library, and then takes the corresponding jig and places it on the second tray of the second machine tool; after the third machine tool detects the command of the second tray, releasing the part to the second machine tool for processing, and refreshing the value of the table 2 into the value of the table 1 while releasing the part;
when the values of the two tables are the same, the part enters a second machine tool for machining, and when the values of the two tables are different, the part enters the second machine tool for machining after the clamp of the second tray is replaced; and the like, completing the processing of all parts.
The beneficial effects are that: the clamps for clamping the parts are stored in the clamp library, and when the type of the parts to be processed is changed, an operator conveys the currently used clamps back to the clamp library, and the required clamps are extracted from the clamp library and are mounted on a machine tool. In the production line simulation model, the control logic of the simulation system is designed, so that an operator can better take the consistency of the logic of the clamp and the actual situation, the consistency of simulation quality and simulation animation and the actual situation is emphasized in detail, the running process of the actual manufacturing system can be restored to the maximum extent, and the confidence of the simulation model is improved. The invention can be applied to other similar situations, but is not limited to simulation processes in which the operator prefers the fixture when the part type is changed.
Drawings
FIG. 1 is a schematic diagram of a simulation of the present invention;
fig. 2 is a flow chart of the operation of the present invention.
Detailed Description
To make the objects, contents and advantages of the present invention more apparent, the following detailed description of the specific embodiments of the present invention will be given.
The invention provides a simulation method for replacing a clamp in a machining production line, which comprises the following steps:
step one: adopting Flexsim simulation software, and constructing a simulation model according to a preset production line layout scheme:
the simulation model comprises a clamp library, trays, machine tools, operators and other manufacturing resources, wherein each machine tool is provided with one tray, and the operators are used for placing the clamps in the clamp library on the trays of the machine tools; the temporary storage area 1 is used for storing unprocessed parts, and the third machine tool 3 is used for detecting whether the processed and unprocessed parts are of the same type;
step two: setting manufacturing resource attributes:
setting attribute parameters of each manufacturing resource, such as walking speed of an operator, time for installing and removing the clamp and position for placing the clamp, according to the collected data of each manufacturing resource;
step three: the consistency of the simulation model and the reality system is ensured, and the simulation model is realized by the following method:
referring to fig. 1 and 2, in the simulation model, in an initial state of the model, parts are prohibited from entering the first machine tool 1 and the second machine tool 2, empty data tables 1 and 2 are created, values of the tables 1 and 2 are set to 0, an operator takes a jig from a jig library after receiving a command for machining the parts, and installs the jig on the first pallet 1, at the same time, the operator installs the parts from the temporary storage area 1 to the first machine tool 1 for machining after the first machine tool 1 receives the command for installing the jig, the first machine tool 1 machines only one part, and the type value X of the parts is recorded in the table 1; when the parts are processed and leave the first machine tool 1, the rest unprocessed parts in the temporary storage area 1 sequentially enter the third machine tool 3, the type values Y of the parts are recorded in the table 2, the type values of the table 1 and the table 2 are obtained and then compared, if the value X of the table 1 is equal to the value Y of the table 2, namely the type of the last processed part is the same as the type of the part to be processed, the unprocessed parts enter the second machine tool 2 for processing; refreshing the values of table 2 to the values of table 1 when the part leaves the third machine tool 3, so as to compare the values of table 1 and table 2 when the next part enters the third machine tool 3; when the value X of table 1 is not equal to the value Y of table 2, the operator transfers the jig from the first pallet 1 back to the jig library, and then takes the corresponding jig and places it on the second pallet 2 of the second machine tool 2. After the third machine tool 3 detects the command of the second tray 2, the parts are released to the second machine tool 2 for processing, and the values of table 2 are updated to the values of table 1 at the same time of releasing, so that the values of table 1 and the values of table 2 are compared when the next part enters the third machine tool 3. When the values of the two tables are the same, the parts enter the second machine tool 2 for processing, and when the values of the two tables are different, the parts enter the second machine tool 2 for processing after being replaced by the clamp of the second tray 2. And the like, completing the processing of all parts. After all the codes are set, the animation effect that the operator gets more the clamp when the part type is changed can be realized.
It should be noted that the first machine tool 1 functions as a detection station, and the processing time thereof may be set to 0 in order to compare the values of the data tables 1 and 2. The second machine tool 2 and the third machine tool 3 machine the parts to be machined, the second machine tool 2 machines only one part, and the remaining parts are machined on the third machine tool 3. Two machine tools are required in order to achieve the same number of part types just started, whether 1 or more, the method can still be implemented. The number of the trays in the clamp library is one and only one, and a plurality of trays are represented by one tray, so that the method is easier to realize. The operator needs a certain time to install and take up the jig, and the time can be set in the loading and unloading trigger of the operator according to the time actually used.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (4)
1. The simulation method for replacing the clamp in the machining production line is characterized by comprising the following steps of:
step one, constructing a simulation model according to a preset production line layout scheme: the manufacturing resources of the simulation model comprise a temporary storage area, a clamp library, two trays, three machine tools and operators;
step two, setting manufacturing resource attributes: setting attribute parameters of each manufacturing resource according to the collected data of each manufacturing resource;
step three, realizing the consistency of the simulation model and the reality system by the following method:
in the initial state of the simulation model, prohibiting parts from entering a first machine tool and a second machine tool, creating empty data tables 1 and 2, setting the values of the tables 1 and 2 to 0, after receiving a command for machining the parts, an operator taking a clamp from a clamp library and mounting the clamp on a first tray, simultaneously, after receiving the command for mounting the clamp, the first machine tool mounts the parts from a temporary storage area to the first machine tool for machining, the first machine tool only machines one part, and the type value X of the parts is recorded in the table 1; when the parts are processed and leave the first machine tool, the unprocessed parts remained in the temporary storage area sequentially enter a third machine tool, the type value Y of the entered parts is recorded in the table 2, and the type values of the table 1 and the table 2 are obtained and compared:
if the value X of Table 1 is equal to the value Y of Table 2, i.e. the last machined part is of the same type as the part to be machined, the unmachined part is entered into a second machine tool for machining; refreshing the values of table 2 to the values of table 1 as the part leaves the third machine tool so that the values of table 1 and table 2 are compared as the next part enters the third machine tool;
when the value X of table 1 is not equal to the value Y of table 2, the operator transfers the jig from the first tray back to the jig library, and then takes the corresponding jig and places it on the second tray of the second machine tool; after the third machine tool detects the command of the second tray, releasing the part to the second machine tool for processing, and refreshing the value of the table 2 into the value of the table 1 while releasing the part;
when the values of the two tables are the same, the part enters a second machine tool for machining, and when the values of the two tables are different, the part enters the second machine tool for machining after the clamp of the second tray is replaced; and the like, completing the processing of all parts.
2. The method according to claim 1, wherein the attribute parameters of each manufacturing resource include a speed of an operator traveling, a time of installing and removing the jig, and a position of placing the jig.
3. A simulation method for changing clamps in a machining line according to claim 1, characterized in that the first machine tool is adapted to act as a detection station.
4. A simulation method for changing jigs in a machining line according to any one of claims 1-3, characterized in that the operator takes a certain time for installing and retrieving jigs, and the time is set in the operator's loading and unloading triggers according to the time actually used.
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