KR102282325B1 - Optimum Manufacture Condition Calculation Method - Google Patents

Abstract

The method for deriving optimal processing conditions according to the present invention comprises the steps of (a) selecting a plurality of processing conditions, (b) performing an analysis for each preset selection item according to the plurality of processing conditions selected in the step (a). , (c) selecting a processing material and a processing tool, and optimizing the plurality of processing conditions based on the analysis result in step (b), processing for the processing conditions optimized by the (c) step (d) extracting a stable region, (e) arranging the plurality of processing conditions in order of priority according to a preset arrangement criterion, and determining the optimal processing conditions based on the processing stable region and the processing conditions (f) to

Description

Optimum Manufacture Condition Calculation Method

The present invention relates to a method for deriving optimal processing conditions, and more particularly, to a method for deriving optimal processing conditions to improve processing quality by deriving optimized processing conditions through evaluation of processing stability of processing equipment and materials.

In general, in the process of machining a workpiece through various machine tools, in many cases, machining is performed by applying pre-specified machining conditions for each specific situation for optimal cutting.

However, during the machining process, the machining area of the workpiece by the tool is continuously changed, and the optimum condition is changed in real time due to various causes such as the wear state of the tool and the amount of coolant supplied.

In the past, it was impossible to change the machining conditions in consideration of this point, so as described above, it had no choice but to depend on the previously recommended machining conditions. There was a problem of shortening and increasing the processing cost.

Therefore, a method for solving these problems is required.

Korean Patent Laid-Open Patent No. 10-1999-0003409

The present invention is an invention devised to solve the problems of the prior art described above, and through the evaluation of the processing stability of processing equipment and materials, the optimum processing conditions are derived to improve the processing quality by deriving the optimized processing conditions for each operation The purpose is to provide a method.

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

In the method of deriving the optimal processing conditions of the present invention for achieving the above object, (a) of selecting a plurality of processing conditions, the analysis by preset selection items according to the plurality of processing conditions selected in the step (a) is performed. (b) performing step, selecting a processing material and a processing tool, and optimizing the plurality of processing conditions based on the analysis result in step (b), (c) step, optimization by step (c) (d) extracting a processing stable region for the processed processing conditions, (e) arranging the plurality of processing conditions in priority order according to a preset arrangement standard, and based on the processing stable region and the processing conditions and (f) to determine the optimal processing conditions.

In this case, in step (a), the plurality of processing conditions may include at least any one or more of RPM, feed, depth of cut, lubrication/cooling conditions, and cutting oil conditions of the machining tool.

In addition, in the step (b), the selection item may include at least any one or more of tool wear, material removal rate, and surface roughness of the material.

And before the step (d), the step (Sa) of extracting the dynamic stiffness of the machining tool may be further performed.

Here, in step (d), a machining stability region may be extracted based on the dynamic stiffness of the machining tool extracted in step (Sa) and the machining conditions.

In addition, the step (d) may be performed in consideration of at least one criterion of the cutting amount in the axial direction and the radial direction according to the RPM of the machining tool.

Meanwhile, between the step (d) and the step (e), the step (Sb) of comparing and processing the processing conditions and the processing stability region may be further performed.

In this case, the step (Sb) is a step (Sb-1) of comparing the processing conditions with the processing stable region, and when it is determined that the processing conditions are located in the processing unstable region outside the processing stable region, the processing conditions It may include a step (Sb-2) of correcting to be positioned toward the processing stable region.

In addition, in the step (b), the selection item includes the surface roughness of the material, and in the step (Sb-2), the processing stability region satisfying the surface roughness criterion of the material can be re-derived.

And in step (b), the selection items include tool wear and material removal rate, and in step (e), processing conditions representing the maximum material removal rate based on the tool wear level can be arranged as priority. there is.

The method of deriving the optimum processing conditions of the present invention for solving the above problems can derive the optimized processing conditions for each operation through the evaluation of processing stability of processing equipment and materials, so that processing can be performed according to the changing environment according to the situation. As it is performed, it has the advantage of greatly improving the processing quality.

In addition, according to the optimized machining, the wear amount of the tool can be minimized to maximize the lifespan, and there is an advantage of reducing the overall machining cost.

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 view showing each process of a method for deriving an optimal processing condition according to an embodiment of the present invention;
2 is a view showing a detailed process of the step (Sb) of comparing the processing conditions and the processing stability region in the method for deriving the optimum processing conditions according to an embodiment of the present invention; and
3 is a view showing a process of comparing the machining conditions and the machining stability region through the software in which the algorithm is implemented in the method for deriving the optimal machining conditions according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention in which the objects of the present invention can be specifically realized will be described with reference to the accompanying drawings. In describing the present embodiment, the same names and the same reference numerals are used for the same components, and an additional description thereof will be omitted.

1 is a view showing each process of a method for deriving an optimal processing condition according to an embodiment of the present invention.

As shown in FIG. 1, the method for deriving the optimal processing conditions according to an embodiment of the present invention includes (a) of selecting a plurality of processing conditions, and a process based on the plurality of processing conditions selected in the step (a). (b) performing an analysis for each set selection item, (c) selecting a processing material and a processing tool, and optimizing the plurality of processing conditions based on the analysis result in the step (b); (d) extracting a processing stable region for the processing conditions optimized by the step (c); (e) arranging the plurality of processing conditions in order of priority according to a preset arrangement standard; and (f) determining the optimum processing conditions based on the processing stability region and the processing conditions.

The step (a) is a process of deriving predetermined conditions for a tool or fluid used in machining, such as a machining tool, lubrication/cooling, and cutting oil. For example, the plurality of machining conditions are RPM of the machining tool, feed, depth of cut, It may include at least any one or more of lubrication/cooling conditions and cutting oil conditions.

In addition, the step (b) is a process of analyzing a preset selection item according to the plurality of processing conditions selected in the step (a), and the selection item is at least any one or more of tool wear, material removal rate, and surface roughness of the material. may include.

That is, in steps (a) and (b), various conditions are collected before processing, and basic analysis is performed on them.

Then, in step (c), a processing material and a processing tool are selected, and the plurality of processing conditions for the selected processing material and processing tool are optimized based on the analysis result in the step (b).

That is, in step (c), the plurality of processing conditions for the selected processing material and processing tool can be optimized by reflecting the result of the basic analysis performed in advance in a state in which the processing material and the processing tool for performing the processing are selected. there is.

And in step (d), for the processing conditions optimized by step (c), the processing stability region is extracted by applying it to the stability evaluation table derived on the software implemented according to the algorithm of the present invention.

That is, step (d) is a process for determining whether processing stability is secured when processing is performed under the currently selected processing conditions.

On the other hand, before the step (d), the step (Sa) of extracting the dynamic stiffness of the machining tool may be further performed, and in this case, step (d) is the copper of the machining tool extracted in step (Sa). It is possible to extract the processing stability region based on the rigidity and the processing conditions.

In addition, the step (d) may be performed in consideration of at least one criterion of the cutting amount in the axial direction and the radial direction according to the RPM of the machining tool.

In addition, between the step (d) and the step (e), the step (Sb) of comparing and processing the processing conditions and the processing stable region may be further performed.

2 is a view showing a detailed process of the step (Sb) of comparing the processing conditions and the processing stability region in the method for deriving the optimal processing conditions according to an embodiment of the present invention.

As shown in FIG. 2 , the step (Sb) is a step (Sb-1) of comparing the processing conditions with the processing stable region, and the processing conditions are located in the processing unstable region outside the processing stable region. When it is determined, the step (Sb-2) of correcting the processing condition to be positioned toward the processing stable region is included.

That is, in step (Sb-1), it is determined whether the processing condition selected in step (c) is located within the processing stable region extracted by step (d), and as a result of this determination, the processing condition is within the processing stable region. If it is determined that the location is located, step (e) that is performed subsequently may be performed.

However, when it is determined that the processing condition is located in the processing unstable region outside the processing stable region, the processing condition is corrected to be located in the processing stable region side.

In this case, in the step (b), the selection item may further include the surface roughness of the material. In this case, the step (Sb-2) is to re-derive a processing stability region that satisfies the surface roughness criterion of the material. can

After re-derivation of the processing stable region, the processing conditions and the processing stable region are re-compared, and the above process including the steps (Sb-1) and (Sb-2) may be repeated according to the result.

3 is a view showing a process of comparing the machining conditions and the machining stability region through the software in which the algorithm is implemented in the method for deriving the optimal machining conditions according to an embodiment of the present invention.

3 shows an example of visualizing the derived stability evaluation table through software, wherein the blue area is the processing stability area, and the other areas are the processing unstable area.

In other words, in this software, if the processing condition selected in step (c) is not located within the blue area, it repeats n times so that the processing condition is located within the blue area by re-deriving the processing stability area that satisfies the surface roughness standard can be done

Thereafter, the step (e) of arranging the plurality of processing conditions in order of priority according to a preset arrangement standard, and the step (f) of determining the optimal processing conditions based on the processing stability region and the processing conditions are performed. , and through this, it is possible to derive machining conditions optimized for the machining operation to be performed.

In this case, in step (b), the selection items may include a tool wear level and a material removal rate. In this case, the step (e) prioritizes the machining conditions representing the maximum material removal rate based on the tool wear level. can be arranged as

However, such a priority condition is presented as an example, and it goes without saying that the priority condition may be arbitrarily determined according to various criteria.

As described above, preferred embodiments according to the present invention have been described, and the fact that the present invention can be embodied in other specific forms without departing from the spirit or scope of the present invention in addition to the above-described embodiments is one of ordinary skill in the art. It is obvious to them. Therefore, the above-described embodiments are to be regarded as illustrative rather than restrictive, and accordingly, the present invention is not limited to the above description, but may be modified within the scope of the appended claims and their equivalents.

Claims (10)

(a) selecting a plurality of processing conditions;
(b) performing an analysis for each preset selection item including the surface roughness of the material according to the plurality of processing conditions selected in step (a);
(c) selecting a processing material and a processing tool, and optimizing the plurality of processing conditions based on the analysis result in the step (b);
(d) extracting a processing stable region for the processing conditions optimized by the step (c);
(e) arranging the plurality of processing conditions in order of priority according to a preset arrangement standard; and
(f) determining an optimal processing condition based on the processing stability region and the processing conditions;
includes,
Between step (d) and step (e),
(Sb) step of comparing and processing the processing conditions and the processing stable region is further performed,
The step (Sb) is,
(Sb-1) comparing the processing conditions with the processing stability region through software that visualizes the stability evaluation table; and
When it is determined that the processing condition is located in the processing unstable region outside the processing stable region, re-deriving a processing stable region that satisfies the standard for surface roughness of the material and correcting the processing condition so that the processing condition is located within the processing stable region repeating n times (Sb-2);
containing,
Method of deriving optimal processing conditions. According to claim 1,
In step (a),
The plurality of machining conditions is an optimal machining condition deriving method including at least one of RPM, feed, depth of cut, lubrication/cooling conditions, and conditions of cutting oil of the machining tool. According to claim 1,
In step (b),
The selection item is an optimal processing condition deriving method further comprising at least any one or more of a tool wear rate and a material removal rate. According to claim 1,
Before step (d),
A method for deriving optimal machining conditions in which the (Sa) step of extracting the dynamic stiffness of the machining tool is further performed. 5. The method of claim 4,
Step (d) is,
An optimal machining condition deriving method for extracting a machining stability region based on the machining conditions and the dynamic stiffness of the machining tool extracted in the step (Sa). According to claim 1,
Step (d) is,
A method of deriving optimal machining conditions performed in consideration of at least one criterion among the amount of cut in the axial direction and the radial direction according to the RPM of the machining tool. delete delete delete According to claim 1,
In step (b),
The selection items include tool wear and material removal rate,
Step (e) is,
An optimal machining condition deriving method in which the machining conditions representing the maximum material removal rate are prioritized and arranged based on the tool wear level.

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