KR20230123117A - SMT system with increased production efficiency - Google Patents

Abstract

The present invention provides a plurality of facilities for producing products by performing an operation of mounting a plurality of elements on a PCB; and a facility control unit configured to set the plurality of facilities so that a balance of semi-finished product production time is maintained in each of the plurality of facilities.

Description

SMT system with increased production efficiency}

The present invention relates to an SMT system with increased production efficiency.

Surface Mounting Technology (SMT) is a general term for technology that attaches components that can be directly mounted on the surface of a printed circuit board (PCB) to electronic circuits. A production line where such SMT is applied requires several facilities.

A production system to which SMT technology is applied includes a plurality of facilities. Multiple facilities operate sequentially and organically to produce products.

In the SMT system according to the prior art, since each of a plurality of facilities is produced by different manufacturers and has different functions and operation methods, time balance between facilities is not correct. As a result, there is a problem of poor productivity.

Korean Patent Publication No. 10-2010-0060079

In order to solve the above problems, an object of the present invention is to provide an SMT system with increased production efficiency by balancing time between a plurality of facilities.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the SMT system with increased production efficiency according to an embodiment of the present invention maintains a time balance of each of a plurality of facilities.

An SMT system with increased production efficiency according to an embodiment of the present invention includes a plurality of facilities for producing a product by performing an operation of mounting a plurality of elements on a PCB; and a facility controller configured to set the plurality of facilities so that a balance of semi-finished product production time is maintained in each of the plurality of facilities.

The plurality of facilities include: a first facility producing a first semi-finished product for a first time; and a second facility for producing a second semi-finished product for a second time using the first semi-finished product.

The facility control unit adjusts the time of at least one of the plurality of processes of the first facility and the plurality of processes of the second facility so that a difference between the first time and the second time is within a reference range.

The facility control unit changes the movement of at least one of a plurality of devices included in the first facility and a plurality of devices included in the second facility, thereby changing a plurality of processes of the first facility and a plurality of processes of the second facility. Adjust the time of at least one of the processes of.

The facility control unit adjusts the time taken from the end of the work in the first facility to the start of the work in the second facility so that the difference between the first time and the second time falls within a reference range.

Details of other embodiments are included in the detailed description and drawings.

According to the present invention, there is one or more of the following effects.

First, there is an effect of producing a product using an SMT system in an optimal production condition because the production time balance is right between a plurality of facilities.

Second, with the application of the present invention, more products can be produced at the same time, thereby increasing production efficiency.

Third, by balancing the production time between facilities, there is an effect of reducing the defect rate.

Fourth, as the production efficiency increases, there is an effect of increasing the producer's sales.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a diagram referenced to describe an SMT system according to an embodiment of the present invention.
Figure 2 is a diagram representing the main components of the SMT system according to an embodiment of the present invention.
3 is a flow chart of an SMT system according to an embodiment of the present invention.
4 is a reference diagram for describing operations of a plurality of facilities based on time according to an embodiment of the present invention.

Hereinafter, the embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings, but the same or similar elements are given the same reference numerals regardless of reference numerals, and redundant description thereof will be omitted. The suffixes "module" and "unit" for components used in the following description are given or used together in consideration of ease of writing the specification, and do not have meanings or roles that are distinct from each other by themselves. In addition, in describing the embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiment disclosed in this specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in this specification, the technical idea disclosed in this specification is not limited by the accompanying drawings, and all changes included in the spirit and technical scope of the present invention , it should be understood to include equivalents or substitutes.

Terms including ordinal numbers, such as first and second, may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as "comprise" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

1 is a diagram referenced to describe an SMT system according to an embodiment of the present invention.

Referring to the drawing, the SMT (Surface Mounting Technology) process prints solder paste on a printed circuit board (PCB), mounts various surface mounting devices (SMD) on it using a mounter facility, and then It refers to the technology of bonding between the leads of a PCB and a surface-mounted component by passing through a reflow oven. Such an SMT production line can be said to be a technology for producing a finished PCB by an organic combination of a plurality of facilities. Depending on the working environment, at least one SMT production line including a plurality of facilities may be provided.

In the SMT production line, numerous minute parts are used for PCB production, and various defects occur in the process of mounting the parts on a feeder and mounting and bonding the parts of the feeder to the PCB by a chip mounter. Since it is difficult to rework due to the miniaturization of parts, it is necessary to suppress the occurrence of defects as much as possible, and it is necessary to easily grasp process information about parts, feeders, heads, nozzles, etc. caused by defects for production and quality innovation.

Referring to Figure 1, the SMT system 10 can be used to produce a plurality of models. This SMT system 10 may be named as an SMT system adaptively corresponding to a production model.

The SMT system 10 includes a terminal 100, a server 200, a database 300, a data processing unit 1400, a facility control unit 500, a data acquisition unit 600, a plurality of facilities 700 and an alarm An output unit 800 may be included. Depending on the embodiment, in the SMT system 10, some of the described components may be omitted or other components may be added.

The SMT system 10 detects the occurrence of abnormalities in the production line through comparison of data obtained from a plurality of facilities 700 included in the SMT production line and preset reference information, and obtains data and pre-stored data for a certain period of time. It is possible to detect and predict anomalies in the production line by comparing accumulated data, generate a warning signal according to detected or predicted anomalies, and transmit the warning signal to the corresponding facility 700 of the SMT production line.

The SMT system 10 provides information on the operation status of the SMT production line according to data obtained from the facilities 700 included in the SMT production line, process indicators of the SMT production line for each period, and other solution information for the occurrence of defects in the SMT production line. It can be created and transmitted to the user's terminal 100.

The data processing unit 400 of the SMT system 10 may acquire various data by being connected to the production line and each facility 700 .

The data acquired by the data acquisition unit 600 may include location information for each head, nozzle, and feeder, work file name, PCB order, number of parts picked up, vision error, pick-up error, etc., and Various data generated from the SMT production line, such as total PCB production time, processing time for each facility, work file change time, and lighting information of vision facilities, can be included.

The data processing unit 400 processes abnormal occurrences such as process errors from the data acquired by the data acquisition unit 600 , stores them in the database 300 , and outputs the data to the equipment control unit 500 .

The data processor 400 loads management data from the database 300 to manage factors affecting production and quality in the SMT production line. Accordingly, the data processing unit 400 may detect the occurrence of an abnormality in the production line through comparison between the acquired data and the management data.

The data processing unit 400 compares the acquired data with the cumulative data for a certain period stored in advance to predict the occurrence of an abnormality in the production line, transfers the data to the equipment control unit 500, and stores it in the database 300.

The data processing unit 400 controls the entire SMT system 10, sets an error level of the production line 700, generates a warning signal according to the level, and transmits it to the equipment control unit 500. Accordingly, the facility control unit 500 may transmit the warning signal received from the data processing unit 400 to the facility 700 where an error occurred inside the SMT production line.

In the database 300, reference information set by the terminal 100 is stored through the relay server 200, and data generated by the data processing unit 400 is stored and updated in real time.

The relay server 200 relays the terminal 100 and the database 300, receives data requested from the terminal 100 from the database 300, and transmits it to the terminal 100. do.

The terminal 100 sets standard information about equipment data, model data, parts data, and worker data of the SMT production line and stores them in the database 300. In addition, the terminal 100 sets a reference value including a lower limit value and an upper limit value for management data for managing factors (eg parts, heads, nozzles, etc.) that affect production and quality in the SMT production line. and can be stored in the database 300.

The alarm output unit 800 may be connected to the facility control unit 500 to receive a warning signal generated by the data processing unit 400 . The alarm output unit 800 can process errors such as process errors to check the occurrence of abnormalities in the SMT production line. For example, the occurrence of an error in the SMT production line can be notified by displaying the occurrence of a process error on the monitor of the equipment inside the SMT production line or by outputting a warning sound.

Figure 2 is a diagram representing the main components of the SMT system according to an embodiment of the present invention.

Referring to the drawing, the SMT system 10 may include a plurality of facilities 700, a facility control unit 500, and a data acquisition unit 600.

The plurality of facilities 700 include a loader, a screen printer, a chip mounter, a multi mounter, a reflow, an unloader, and an automatic optical Inspector), a wave soldering machine, and the like.

The loader is a facility that continuously supplies PCB boards.

A screen printer is a facility that applies solder cream using a metal mask to a PCB pad on which a component is to be mounted in order to mount a component on a PCB substrate.

A chip mounter is a facility that mounts various parts on a PCB board. Depending on the speed, it can be classified as medium speed and high speed.

Reflow is a facility that melts and cools the solder and components applied on the PCB board so that they can be soldered. In reflow, the temperature can be adjusted to the optimal temperature profile to match the optimal melting temperature for the unique properties of the solder.

An unloader is a facility that receives and automatically loads PCBs after work has been completed.

AOI is a facility that inspects defects such as the solder printing state of the PCB board and the soldering state after reflow. The AOI may include at least one camera, and compare a PCB image obtained through the camera with an image of an optimal board to inspect defects.

The wave soldering machine is a facility that enables soldering work by contacting the components on the PCB with the surface of continuously circulating and flowing molten solder.

A plurality of facilities 700 must be sequentially and organically operated to produce a product of a set model. For example, after working in the first facility, the first semi-finished product worked in the first facility may be used in the second facility.

On the other hand, the semi-finished product may mean a PCB in a state in which work has been completed in a specific facility. A task may refer to an operation performed according to a function of a specific facility.

The plurality of facilities 700 may produce a product by performing an operation of mounting a plurality of devices on a PCB. Here, the product is produced through the SMT system 10, and refers to a finished product in which all parts according to the production plan are mounted on the PCB.

The plurality of facilities 700 may include first facilities and second facilities. The first facility can produce the first semi-finished product during the first time. The second facility may produce a second semi-finished product for a second time using the first semi-finished product.

The facility controller 500 includes application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, It may be implemented using at least one of controllers, micro-controllers, microprocessors, and electrical units for performing other functions.

The facility control unit 500 may control each of the plurality of facilities 700 .

The facility controller 500 may perform settings for each of the plurality of facilities 700 . The facility controller 500 may set the plurality of facilities 700 so that a balance of semi-finished product production time is maintained in each of the plurality of facilities 700 . The facility control unit 500 controls the first facility and equipment so that the difference between the first operating time of the first facility for producing the first semi-finished product and the second operating time of the second facility for producing the second semi-finished product is within a standard range. At least one of the second facilities may be set.

When the difference in time between semi-finished products is produced in each of the plurality of facilities 700 is small, the work of all the facilities 700 is organically performed to improve productivity. That is, as the difference between the time the first semi-finished product is produced in the first facility and the time when the second semi-finished product is produced in the second facility is smaller, the waiting time in the first facility or the second facility is reduced and immediately after the first semi-finished product is produced. It becomes possible to produce the second semi-finished product. Standby time is small for one product, but the sum of waiting times in a mass production system has a great impact on overall production efficiency. The relationship between the times required to produce semi-finished products in the plurality of facilities 700 can be explained as the balance of semi-finished product production times. In addition, the balance of semi-finished product production time can be explained by extending it to the time of transporting or loading and unloading semi-finished products between the plurality of facilities 700 .

The facility controller 500 may adjust the time of at least one of the plurality of processes of the first facility and the plurality of processes of the second facility so that the difference between the first time and the second time is within a reference range.

The first facility may produce the first semi-finished product through a plurality of processes. The facility controller 500 may set a plurality of processes of the first facility. For example, when the first facility produces the first half-finished product through processes 1a and 1b, the facility control unit 500 may set process 1a and process 1b. The equipment control unit 500 may change the order of the first step and the second step. The facility controller 500 may adjust the time required for the first process and the time required for the first process 1b. The facility controller 500 may adjust the time interval between the first process 1a and the first process 1b.

The second facility may produce the second semi-finished product through a plurality of processes. The facility controller 500 may set a plurality of processes of the second facility. For example, when the second facility produces the second half-finished product through processes 2a and 2b, the facility control unit 500 may set process 2a and process 2b. The facility control unit 500 may change the order of the 2a process and the 2b process. The facility controller 500 may adjust the time required for the 2a process and the 2b process. The facility controller 500 may adjust the time interval between the 2a process and the 2b process.

The facility control unit 500 changes the motion of at least one of a plurality of devices included in the first facility and a plurality of devices included in the second facility to perform a plurality of processes of the first facility and a plurality of processes of the second facility. At least one time may be adjusted during the process.

The facility control unit 500 may set motions of equipment included in each of the plurality of facilities 700 . The facility control unit 500 may adjust the time required for the process by setting the movement of the equipment. For example, the facility control unit 500 may adjust the time taken for the process of the facility by adjusting the operation speed of the equipment, the moving distance of the equipment, and the like.

The facility control unit 500 may adjust the time taken from the end of the work in the first facility to the start of the work in the second facility so that the difference between the first time and the second time falls within a reference range. For example, the equipment control unit 500 may reduce or increase the time taken from unloading a first semi-finished product in a first facility to loading in a second facility to maintain a balance of semi-finished product production time.

3 is a flow chart of an SMT system according to an embodiment of the present invention.

4 is a reference diagram for describing operations of a plurality of facilities based on time according to an embodiment of the present invention.

Referring to the drawing, the terminal 100 may set a production plan (S310). Production plan information may be transmitted to the facility control unit 500 . The facility controller 500 may receive production plan information from the terminal 100 via at least one of the server 200 and the database 300 . Depending on the embodiment, the facility controller 500 may directly receive production plan information from the terminal 100 .

The facility controller 500 may control operations of the plurality of facilities 700 according to the production plan information (S320). The facility controller 500 may control the operation of the plurality of facilities 700 so that semi-finished products in charge of each of the plurality of facilities 700 are produced.

The facility control unit 500 may receive work time data of each of the plurality of facilities 700 through the data acquisition unit 600 (S330). For example, the facility controller 500 may receive work time data required to produce the first semi-finished product in the first facility. The facility controller 500 may receive work time data required to produce the second half-finished product in the second facility.

The facility controller 500 may set the facilities 700 so that the balance of semi-finished product production time is maintained in each of the plurality of facilities 700 (S340). The facility control unit 500 controls the first facility and equipment so that the difference between the first operating time of the first facility for producing the first semi-finished product and the second operating time of the second facility for producing the second semi-finished product is within a standard range. At least one of the second facilities may be set.

Step S340 may include step S343 or step S346.

The facility control unit 500 may maintain a balance of semi-finished product production time in each of the plurality of facilities 700 by adjusting the time of at least one of the plurality of processes of the first facility and the plurality of processes of the second facility. Yes (S343).

As illustrated in FIG. 4, the first facility produces the first semi-finished product by performing the 1a process (S411), the 1b process (S412), and the 1c process (S413), and the second facility performs the 2a process ( S421) and the 2b process (S422) may be performed to produce the second semi-finished product.

The 1a process may take T1a time, the 1b process may take T1b time, and the 1c process may take T1c time. In addition, it may take a total of T1 time to produce the first semi-finished product in the first facility.

The 2a process may take T2a time, and the 2b process may take T2b time. In addition, it may take a total of T2 time to produce the second half-finished product in the second facility.

The facility controller 500 controls the time T1 required to produce the first semi-finished product and A balance between the time T2 required to produce the second semi-finished product may be balanced.

The facility control unit 500 adjusts the time T2a and T2b of any one of the plurality of processes S421 and 422 of the second facility to produce the first semifinished product and the time T2 required to produce the second semifinished product. It is possible to balance the time T1 required to do this.

The equipment control unit 500 controls the time required to produce the first semi-finished product (T1) and the time required to produce the second semi-finished product by adjusting the interval time between the plurality of processes (S411, S412, and S413) of the first facility. A balance can be struck between the times T2.

Meanwhile, the interval time between the operation of the first facility and the operation of the second facility may be included in the operation time of the second facility. In this case, the facility control unit 500 may balance the time T1 required to produce the first semi-finished product and the time T2 required to produce the second semi-finished product by adjusting the interval time.

Meanwhile, the interval time between the work of the first facility and the work of the second facility may be included in the work time of the first facility. In this case, the facility control unit 500 can balance the time required to produce the first semi-finished product (T1) and the time required to produce the second semi-finished product (T2) by adjusting the interval time. .

The facility control unit 500 may maintain a balance of semi-finished product production times in each of the plurality of facilities 700 by adjusting the work interval time between the first facility and the second facility (S346).

After step S340, step S320 may be performed to continue product production.

The SMT system 10 according to an embodiment of the present invention can maximize sales profit by increasing production efficiency.

The above-described present invention can be implemented as computer readable code on a medium on which a program is recorded. The computer-readable medium includes all types of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable media include Hard Disk Drive (HDD), Solid State Disk (SSD), Silicon Disk Drive (SDD), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc. there is Also, the computer may include a processor or a control unit. Accordingly, the above detailed description should not be construed as limiting in all respects and should be considered illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

10: SMT system
100: terminal
200: server
300: database
400: data processing unit
500: facility control unit
600: data acquisition unit
700: multiple facilities
800: alarm output unit

Claims (5)

A plurality of facilities for producing products by performing an operation of mounting a plurality of elements on a PCB; and
An SMT system with increased production efficiency comprising: a facility controller configured to set the plurality of facilities so that a balance of semi-finished product production time is maintained in each of the plurality of facilities. The plurality of facilities,
a first facility for producing a first semi-finished product during a first hour; and
A second facility for producing a second semi-finished product for a second time using the first semi-finished product; According to claim 2,
The equipment control unit,
SMT system with increased production efficiency that adjusts the time of at least one of the plurality of processes of the first facility and the plurality of processes of the second facility so that the difference between the first time and the second time is within a reference range . According to claim 3,
The equipment control unit,
At least one of the plurality of processes of the first facility and the plurality of processes of the second facility is changed by changing the movement of at least one of the plurality of equipment included in the first facility and the plurality of equipment included in the second facility. SMT system with increased production efficiency that controls one time. According to claim 2,
The equipment control unit,
An SMT system with increased production efficiency that adjusts the time taken from the end of the work in the first facility to the start of the work in the second facility so that the difference between the first time and the second time is within the standard range.