CN110705116A - 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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- CN110705116A CN110705116A CN201910961538.1A CN201910961538A CN110705116A CN 110705116 A CN110705116 A CN 110705116A CN 201910961538 A CN201910961538 A CN 201910961538A CN 110705116 A CN110705116 A CN 110705116A
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Abstract
The invention relates to a simulation method for replacing a clamp in a machining production line. The clamp for clamping the part is stored in the clamp library, when the type of the part to be processed is changed, an operator conveys the current clamp back to the clamp library, extracts the required clamp from the clamp library and installs the required clamp on a machine tool. In the production line simulation model, the control logic of the control simulation system is designed, so that the logic of the clamp taken by an operator is consistent with the actual condition, the consistency of the simulation quality and the simulation animation with the actual condition is emphasized in detail, the running process of the actual manufacturing system can be restored to the maximum extent, and the confidence coefficient 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 common condition, a workshop uses a discrete event system simulation technology to establish a workshop production line simulation model before the workshop is put into production, so as to simulate the actual production flow, evaluate the conditions of the yield, the utilization rate, the personnel configuration and the like of each device, and avoid the fund waste or the system capacity insufficiency caused by blind decision when the workshop is put into production;
in actual production of a workshop production line, a clamp replacement process is usually replaced by setting preset time, the process of replacing the clamp by an operator is not clear, and a simulation model cannot simulate an actual production process, so that a simulation result is inaccurate, and the yield, the utilization rate and the personnel configuration of each device cannot be accurately 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: most of the simulation of the prior manufacturing system does not consider the problem of the clamp changing process of the machine tool.
In order to solve the technical problem, 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 an operator;
step two, setting the attribute of the manufacturing resource: 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, forbidding parts to enter 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 be 0, after receiving a part machining command, an operator goes to a clamp library to pick up a clamp and installs the clamp on a first tray, and after receiving the clamp installation command, the operator installs the parts on the first machine tool from a temporary storage area for machining, only one part is machined by the first machine tool, and the type value X of the part is recorded in the table 1; when the parts are machined and leave the first machine tool, the remaining unmachined parts in the temporary storage area sequentially enter a third machine tool, the type value Y of the entering parts is recorded in the table 2, and the type values in the tables 1 and 2 are obtained and then 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 the second machine for machining; refreshing the values of table 2 to the values of table 1 when the part leaves the third machine tool for the next part entering the third machine tool to compare the values of table 1 and table 2;
when the value X of Table 1 is not equal to the value Y of Table 2, the operator transports the fixture from the first pallet back to the fixture library, then takes the corresponding fixture and places it on the second pallet of the second machine tool; after detecting the command that the second tray is installed, the third machine tool releases the part to the second machine tool for processing, and refreshes the value of the table 2 into the value of the table 1 while releasing;
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 fixture of the second tray is replaced; and by parity of reasoning, the processing of all parts is completed.
Has the advantages that: the clamp for clamping the part is stored in the clamp library, when the type of the part to be processed is changed, an operator conveys the current clamp back to the clamp library, extracts the required clamp from the clamp library and installs the required clamp on a machine tool. In the production line simulation model, the control logic of the control simulation system is designed, so that the logic of the clamp taken by an operator is consistent with the actual condition, the consistency of the simulation quality and the simulation animation with the actual condition is emphasized in detail, the running process of the actual manufacturing system can be restored to the maximum extent, and the confidence coefficient of the simulation model is improved. The invention can be applied to other similar occasions, and is not limited in the simulation process of replacing the clamp by an operator when the type of the part is changed.
Drawings
FIG. 1 is a simulation schematic of the present invention;
fig. 2 is a flow chart of the operation of the present invention.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention is provided.
The invention provides a simulation method for replacing a clamp in a machining production line, which comprises the following steps:
the method comprises the following steps: adopting Flexsim simulation software, and constructing a simulation model according to a preset production line layout scheme:
the simulation model comprises manufacturing resources such as a clamp library, trays, machine tools, operators and the like, wherein each of the two machine tools is provided with one tray correspondingly, and the operator is 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 parts and the unprocessed parts are of the same type;
step two: setting the attribute of the manufacturing resource:
setting attribute parameters of each manufacturing resource, such as the walking speed of an operator, the time for installing and removing the clamp and the position for placing the clamp, according to the collected data of each manufacturing resource;
step three: the consistency of the simulation model and a real system is ensured, and the method is realized by the following steps:
referring to fig. 1 and 2, in the simulation model, in the initial state of the model, a part is prohibited from entering a first machine tool 1 and a second machine tool 2, an empty data table 1 and an empty data table 2 are created, and values of the tables 1 and 2 are set to 0, after receiving a command for part machining, an operator goes to a jig library to pick up a jig and installs the jig on a first pallet 1, and after receiving a command for jig installation, the operator installs the part on the first machine tool 1 from a temporary storage area 1 for machining, the first machine tool 1 machines only one part, and records a type value X of the part in the table 1; when the part is machined and leaves the first machine tool 1, the remaining unmachined parts in the temporary storage area 1 sequentially enter a third machine tool 3, the type value Y of the entering parts is recorded in the table 2, the type values in the tables 1 and 2 are obtained and compared, if the value X in the table 1 is equal to the value Y in the table 2, the type of the last machined part is the same as that of the part to be machined, and the unmachined parts enter the second machine tool 2 for machining; refreshing the values of table 2 to the values of table 1 when the part leaves the third machine 3, to compare the values of table 1 and table 2 when the next part enters the third machine 3; when the value X of table 1 is not equal to the value Y of table 2, the operator transports the jig from the first pallet 1 back to the jig magazine, 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 that the second pallet 2 is installed, the part is released to the second machine tool 2 for machining, and the values in table 2 are refreshed to the values in table 1 while the part is released, so that the values in table 1 and the values in 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 part enters the second machine tool 2 for machining, and when the values of the two tables are different, the part enters the second machine tool 2 for machining after the clamp of the second tray 2 is replaced. And by parity of reasoning, the processing of all parts is completed. After all the codes are set, the animation effect that an operator takes the clamp more when the type of the part is changed can be achieved.
It should be noted that the first machine tool 1 functions as a detection station, and the machining time thereof can be set to 0 in order to compare the values of the data table 1 and the data table 2. The second machine tool 2 and the third machine tool 3 machine parts which need to be machined, the second machine tool 2 only machines one part, and the rest parts are machined on the third machine tool 3. Two machines are required in order to achieve the same number of part types, whether 1 or more, that will be machined just initially, the method still being able to be carried out. The method is easier to realize because the number of the trays in the jig library is only one, and the number of the trays is more than one. The operator needs a certain time to install and retrieve the clamp, and the time can be set in the operator's loading and unloading trigger according to the actual time used.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A simulation method for replacing a clamp in a machining production line 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 an operator;
step two, setting the attribute of the manufacturing resource: 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, forbidding parts to enter 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 be 0, after receiving a part machining command, an operator goes to a clamp library to pick up a clamp and installs the clamp on a first tray, and after receiving the clamp installation command, the operator installs the parts on the first machine tool from a temporary storage area for machining, only one part is machined by the first machine tool, and the type value X of the part is recorded in the table 1; when the parts are machined and leave the first machine tool, the remaining unmachined parts in the temporary storage area sequentially enter a third machine tool, the type value Y of the entering parts is recorded in the table 2, and the type values in the tables 1 and 2 are obtained and then 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 the second machine for machining; refreshing the values of table 2 to the values of table 1 when the part leaves the third machine tool for the next part entering the third machine tool to compare the values of table 1 and table 2;
when the value X of Table 1 is not equal to the value Y of Table 2, the operator transports the fixture from the first pallet back to the fixture library, then takes the corresponding fixture and places it on the second pallet of the second machine tool; after detecting the command that the second tray is installed, the third machine tool releases the part to the second machine tool for processing, and refreshes the value of the table 2 into the value of the table 1 while releasing;
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 fixture of the second tray is replaced; and by parity of reasoning, the processing of all parts is completed.
2. The method of claim 1, wherein the attribute parameters of each manufacturing resource include speed of operator walking, time of installing and removing the fixture, and location of fixture placement.
3. The method as claimed in claim 1, wherein the first machine tool is used as a testing station.
4. The simulation method for replacing jigs in a machining line according to claim 1, wherein the second machine tool and the third machine tool machine parts to be machined, the second machine tool machines only one part, and the remaining parts are machined on the third machine tool.
5. A simulation method for fixture change in a machining line according to any of claims 1-4, characterized in that the time required for the operator to install and retrieve the fixture is set according to the actual time used in the loading and unloading triggers of the operator.
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| WO2019076231A1 (en) * | 2017-10-17 | 2019-04-25 | 广东工业大学 | Virtual product switching method for electronic product production line |
| CN109277849A (en) * | 2018-11-12 | 2019-01-29 | 沈阳工学院 | Quick fixture replacing device and Flexible Manufacture production unit |
| CN109623656A (en) * | 2018-11-12 | 2019-04-16 | 南京航空航天大学 | Mobile dual robot collaboration grinding device and method based on thickness on-line checking |
| CN109359419A (en) * | 2018-11-13 | 2019-02-19 | 内蒙古第机械集团股份有限公司 | Automatic stereowarehouse automatically processes the emulation mode that order exports specified material |
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