KR20090026398A - The method to generate the cutting plan automatically for the coil shaped material - Google Patents

Abstract

A coil cutting plan establishing method using width and length directional template for automatically arranging a member to steel, and a raw material of the coil type of the paper manufacture and a plastic film industry field are provided to search raw material of coil type which a scrap is minimum. A producing order is performed based on an order request including order quantity, due day, and material quality(S1). The availability original material according to order is searched(S2). The production priority and constraint condition are defined(S3). A plurality of members is automatically combined in a plurality of coils(S4). The generated combination result is verified. A potential order is determined(S6). A redundant product is originally determined(S7). A processing order issues(S8).

Description

The method to generate the cutting plan automatically for the Coil shaped material}

The present invention relates to an automatic widthwise combination method for cutting and placing a member in a coil-shaped raw material to reflect the production constraints according to the order order of the raw material produced in the coil form.

Typically, the steel, paper, and plastic film industries produce raw materials in the form of coils in order to facilitate the production, storage, and movement of sheet metal industrial raw materials. The coil-type raw materials produced are used as production raw materials in industries such as heavy industry, home appliances, and packaging by cutting and combining members in the length and width directions in the raw material inventory according to the user's order.

Except for coils produced in steel mills in standard sizes determined according to the cutting plan for mass production, such as automobiles, the size and quantity of parts ordered in the ready-made stock according to the standard are variable. It is inevitable that excessive losses of raw materials and remnants will occur.

When the width and length combinations of members are applied to the coil-shaped raw materials by the attraction force, the number of cases increases rapidly depending on the size and quantity of the raw materials, the size and the performance of the members, and there is a limit of time to the calculation. The loss rate of cutting raw materials is large according to the ability and ability, and the variation of productivity and raw material loss of cutting equipment is large according to the change of personal feelings, so it is difficult to establish scientific cutting plan and material management. .

It is therefore an object of the present invention to provide a method for quickly and automatically calculating the results of an automatic widthwise longitudinal combination for placing and cutting a plurality of members in various coil-shaped raw materials, reflecting production constraints according to the order.

Another object of the present invention is to include the order of the prospective customer among the existing customers using the same material and thickness in the order placed in the production order, and to search for raw materials to minimize processing losses as well as atomic coils as well as scalps and residues. The automatic combination minimizes scrap and residue of the coil.

Another object of the present invention is to provide a combination having the same width in the width direction when combining the member to the coil material

Provide a way to increase machine productivity by minimizing knife changes in cutting equipment

It is.

In order to achieve the above objects, the production order and available inventory search method according to the present invention is the first step of searching for orders by material and thickness according to the delivery date request date, and available available to meet the searched orders of the first step It consists of a second step of searching for raw materials and a third step of defining a combination reflecting the production targets and priorities required by the user and the production constraints.

The automatic combination establishment method for arranging the member in the coil-shaped raw material according to the present invention includes the first step to query the production order, the second step to query the available coils that can accommodate the production order of the first step, and the first and second steps It consists of three steps of creating a longitudinal template based on the information and four steps of creating a template in the width direction. In addition, it consists of five steps referring to the combination options that define the production constraints, six steps to search for the same width template so as not to change the knife width during coil processing, and seven steps to perform the automatic combination in consideration of this. User verification of the combination is performed in step 8.

Other objects and advantages of the present invention in addition to the above object will become apparent from the description of the preferred embodiment of the present invention with reference to the accompanying drawings.

As described above, according to the coil cutting plan establishment using the widthwise longitudinal template according to the present invention, the template suitable for the size of the coil is automatically calculated in order to automatically combine the order order in the widthwise direction of the available stock coil material, thereby combining the templates. This can automatically yield near-optimal combination solutions and improve raw material yield and cutting equipment efficiency. In addition, if there is an excessive amount of unnecessary remnants, the optimal materials and potential orders can be searched for and included in the combined available material file and the production order file to minimize scrap of raw materials and minimize inventory due to the residue.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

A preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 10.

1 is a flowchart illustrating a method of automatically searching for an order and a material and automatically assembling a member to a coil-shaped raw material in a width direction and a length direction according to an embodiment of the present invention.

In step 1, you search for orders and prospects, including order quantity and delivery date by member, material and thickness, and establish a production order. Then, in step 2, the available raw materials according to the order order are searched, in step 3 the production priorities and constraints are defined, and in step 4, the multiple members are automatically combined in the multiple coils. Subsequently, in step 5, the result of the combination generated in step 4 is verified, and if the result of verification in step 5 is not satisfied, the potential order that can be added to the combination is determined and determined in step 6. Step 7 explores and determines the scalp size and surplus products and residues that can be used for the combination in addition to the coils originally purchased. If the results of step 1 to step 7 are satisfactory, then step 8 issues a machining instruction.

2 is a flowchart illustrating a step-by-step method for searching for orders required for coil cutting planning, and searches for orders to be included in cutting planning by delivery date, material, and thickness according to the order order.

In step 10, the order details are entered, in step 11, the orders are sorted by delivery date, in step 12, the orders are sorted by material, and in step 13, the orders are sorted by thickness. Then check the result of the combination in step 14, search for and add potential orders that can be included in the production in step 15 if excessive residuals and scraps occur, repeat the case of step 15 in step 10 In step 16, the production order is determined if the combination results are again checked and satisfied.

FIG. 3 is a flowchart illustrating a step-by-step method of searching for available raw materials that can be produced according to the production order file described in FIG. 2, and searches for raw materials that can be used to combine members in a coil-shaped raw material.

Enter the retaining raw materials in step 20, search for available materials for the combination of width lengths in the stock raw materials in step 21, and search for remnants available for the combination in step 22. In step 23, the width, length, and quantity of the scalp that can be reused after cutting are inputted when the residual width and scrap are excessively generated in the atomic width coil during the combination of the width and length. In step 24, the result of the combination is checked and if the user is not satisfied, the search for additional available raw material files is made in step 25. If the result of the combination is satisfied in step 24, the available materials are determined.

4 is a flowchart illustrating a step-by-step method of automatically combining members in a coil-shaped raw material.

Except for purchasing materials after performing width and length combinations, it is practically impossible to make 100% perfect combinations by varying the order quantity per variable member to the coil-type raw materials produced in standard form. Therefore, the targets and production constraints that should be considered first when combining with the rate of decrement of the absence of production acceptable to the customer should be pre-defined. In detail, the parameters to be defined in the width and length combination of the coil type raw materials are input as shown in Table 1 below.

TABLE 1

Item unit range Default Related Variable Contents Max Width Stacked (Integer) 5-25 25 arrangement Maximum number of laminated sheets in the width direction of the minimum width member Number of batch width adjustment Times (integer) 1-2 2 arrangement Larger steel plate efficiency may increase, but productivity decreases due to blade replacement. Width processing allowance mm (real) 4.0 arrangement When slitting, a simple shearing operation that uses all the coil widths without minimum marginal slitting for coil side gripping is automatically zeroed. Permissible width mm (real) 50.0 arrangement The smaller it is, the narrower the coil selection is. The bigger it is, the more the loss becomes selectable. (Recommended) over-production rate %(mistake) 0.0-10.0 5.0 arrangement The smaller the number of candidate coil groups, the larger the search area adjustment variable. Delivery priority Y / N N arrangement If the cut quantity is higher than the coil stock, cut the lead time earlier. Consider the lowest price Y / N arrangement Processing if production cost is entered Thickness tolerance mm (real) 0.0 property Thickness deviation tolerance that can be processed by coil of different thickness from order quantity Specific weight kg / m ³ 7850.0 property ** Parts to be linked in material related DB Whether to reflect scalp production Y / N Scalp Applicability of Scalp Production Width Applicable Scalp width list is applied Max Scalp Weight kg (real) Scalp Maximum transportable weight when creating a scalp Applicable Scalp Width List (mm) Mm (real) Scalp Placeable Scalp Width List

In Table 1, the maximum width direction stacking number defines the number of cutting tools, such as a knife, which enables the maximum simultaneous setting of cutting equipment held by the user. The maximum number of batch width adjustments enters an allowable number of limits for adjusting the width of the knife during slitting processing in the longitudinal direction of the coil. Width machining allowance is an option to input the part to cut a part of a certain width because the quality of the side is uneven during the production of the coil. The maximum allowable width loss is the width that can be recognized as scrap by the user after the combination of width and length, and the excess production rate cannot be exactly matched by the customer's order to the coil size of the specified specification. Option to enter excess production rate. Priority for delivery is input whether or not to process the order parts that are imminent delivery date, and considering the lowest unit price, the material warehouse is distributed in several regions, so that the shipping cost and the stocking period by distance required for delivery to the place requested by the ordering customer are long. This is an option depending on whether the material with the highest interest cost is used first. For thickness tolerance, enter the coil thickness tolerance of the same material that can be handled if there is no coil thickness for each material requested by the customer. Specific weight is a numerical input that indicates the density of the raw material, allowing the weight to be automatically calculated based on the size and quantity of the member. Whether or not to reflect the scalp production can be reused after cutting in the width direction in case of excessive residue or scrap

Enter whether the material should be considered in the combination of width and length. The maximum scalp weight is an option to define the scalp production limit, as cutting with an excessive scalp creates another inventory burden on the user side. The list of applicable scalp widths can be included in the width length combination, which is an option for specifying the size of the scalp.

In Table 1, display the order requesting the production in step 30 of the predefined width-length combination constraint

In step 31, the available coil is queried. Combination in the longitudinal direction of the raw material in the form of a coil in step 32

Create a template possible, and in step 33 generates a template that can be combined in the width direction. step

Refer to the constraints defined in Table 1 at 34 and search for equal width templates defined at step 35 to minimize the replacement of the width of the cutting tool of the coil cutting equipment at step 35. In step 36, the combination between the templates is performed, and in step 37, the result generated in step 36 is verified and the combination result is calculated.

FIG. 5 is a diagram illustrating the generation of a width and a longitudinal template for automatic combination, and generates a width order template and a length combination template according to the raw material size.

As the size of raw materials varies, the quantity is large, and the size of members varies, the number of cases that can be combined increases exponentially. Therefore, in the case of the combination of width and length, the selection method that can be considered in the combination is limited due to the limitation of time, and thus there is a problem in calculating a result that simultaneously satisfies a plurality of production targets.

The width and length combination template is an approach for generating an available template that can be combined to minimize the number of cases and quickly calculating the optimal solution using the template.

Considering the available coil raw material length, create a longitudinal template that can combine the members in the layout, and calculate the width template by considering the size and quantity of the members. The template is combined to minimize the change of the knife width during the cutting of the coil while minimizing material loss in the template in the length and width directions.

FIG. 6 is a view illustrating a case in which the combination is performed by reflecting the scalp during the automatic combination, and after the member is disposed in the raw material in the form of a coil, when the residual material is large, the combination may be automatically included.

Scalp is a coil that can be reused after processing the atomic bomb coil, and means a material that can be used in combination with a member in the coil when residual material is generated. There are four types of scalp applied to the width combination: when the width is combined with pure members without a scalp, when slit including the scalp, and after the member is placed, the residue is generated after the member is cut. This is the case when using the scalp and the residue itself generated as a scalp.

FIG. 7 is a diagram illustrating a potential order search that can be included in an automatic combination. In the case where there is an inevitable amount of residuals due to a small quantity of orders compared to the size of the coil, the order is used to search for a potential order and use the combination.

In step 40, a search is made for a list of customers who have used the same material. In step 41, a size and quantity of parts ordered among customers are searched. In step 42, the final order date is searched and in step 43, the frequency of the order is calculated to calculate the optimal prospects and orders. You can include the customer's potential order in the remnants that can occur after the combination by contacting the customer explored in step 43 and if the potential customer agrees, in step 45 the production order file is created by adding the potential order to the existing production order. do.

8 is a view for explaining the search for available materials that can be included in the automatic combination, the combination of using the atomic bomb production coil to generate a remnant to search for a small size material suitable for small orders.

In step 50, a scalp that can be used for the width-length combination among the materials registered as a scalp is searched, and in step 51, a remnant that can accommodate a small order among the remnants is searched. In step 52, a suitable surplus product capable of accommodating a small order among the surplus products having a delivery time is searched for, and in step 53, the most suitable material among the above-discovered materials is registered as available material.

9 is a view for explaining a case of explaining the conventional technology, it will be described an application example of the currently commercialized products.

Since the width combination is performed based on the same column based on mathematical modeling, there is a problem in that scrap accumulates and grows in each row direction. In addition, it is difficult to form an efficient combination between members having a great difference in length.

FIG. 10 is a diagram illustrating production targets considered in automatic combination, and is an example of a function configuration for simultaneously meeting opposing production targets.

In order to meet customers' requested delivery time, it is the cause of reducing material efficiency and equipment and manpower productivity, and if the reduction of scrap is aimed at the efficiency of raw materials, satisfactory delivery time and equipment and manpower productivity are reduced. In other words, a solution must be produced that can simultaneously meet conflicting production targets.

1 is a flow chart illustrating a step-by-step automatic combination method of the coil-shaped raw material according to an embodiment of the present invention

2 is a flowchart illustrating step by step a method of establishing a production order of coil raw materials;

3 is a flow chart illustrating step by step a method of searching for available materials;

4 is a flowchart for explaining a method for implementing an automatic combination step by step;

5 creates a width and length template for automatic combination

FIG. 6 is a view for explaining a method for mixing a scalp on a general member during automatic combination; FIG.

7 is a diagram illustrating a method of searching for potential orders that can be included in an automatic combination.

8 is a view for explaining a method for retrieving available stock after the time of automatic combination check;

9 is a case illustrating a conventional technology

10 is a view for explaining a production target to be considered in the automatic combination

Claims (3)

Step 1 to explore the potential orders and include them in the order history, Two steps to search for surplus material and include it in the coil inventory entry. Optimal material exploration and production order generation method comprising three steps to define production constraints and priorities including definition of maximum number of knives and number of knife width changes during coil processing The method of claim 1, Transportation cost and emergency production cost Explore and determine stock coils in the appropriate warehouse Method characterized in that reflected in the automatic width length combination program In the automatic width length combination, Calculating a template in the width direction of the available coil; Calculating a template in the longitudinal direction of the available coil; By combining the same width template and without changing the knife of the cutting equipment Recognizing the scalp as a member and performing a width-length combination How to generate automatic width length combination of automatic coil

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