KR20210053368A - Optimum Manufacture Condition Calculation Method - Google Patents

Abstract

The present invention is to provide an optimal processing condition deriving method that can improve processing quality by deriving optimized processing conditions for each operation through processing stability evaluation of processing tools and materials. According to the present invention, the optimal processing condition deriving method 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 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 optimal processing conditions based on the processing stable region and the processing conditions.

Description

Optimum Manufacturing Condition Calculation Method {Optimum Manufacture Condition Calculation Method}

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

In general, in the process of machining a workpiece through various machine tools, machining is often performed by applying predetermined machining conditions for each specific situation for optimal cutting machining.

However, during the machining process, the machining part of the work piece by the tool changes continuously, and the optimum condition changes in real time due to various causes, such as the wear condition of the tool and the supply amount of cutting oil.

In the past, since it was impossible to change the machining conditions in consideration of these points, as described above, there was no choice but to rely on the recommended machining conditions. As a result, the machining quality is degraded depending on the situation, as well as the tool life is reduced. There was a problem of shortening and increasing the processing cost.

Therefore, a method for solving these problems is required.

Korean Patent Publication No. 10-1999-0003409

The present invention is an invention conceived to solve the above-described problems of the prior art, and through the evaluation of processing stability of processing equipment and materials, the optimum processing conditions are derived for each operation to improve the processing quality. It has the purpose of providing a method.

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

The method for deriving the optimal processing conditions of the present invention for achieving the above object includes an analysis for each selection item preset according to the processing conditions selected in step (a) and the processing conditions selected in step (a). Optimization by step (c) and step (c) of performing step (b), selecting a processing material and a processing tool, and optimizing the plurality of processing conditions based on the analysis result in step (b). (D) step of extracting a processing stable region for the previously set processing conditions, step (e) of arranging the plurality of processing conditions in order of priority according to a preset arrangement standard, and based on the processing stable region and the processing conditions Thus, it includes the step (f) of determining the optimum processing conditions.

At this time, in the step (a), the plurality of processing conditions may include at least one or more of RPM of the processing tool, feed, cutting amount, lubrication/cooling conditions, and cutting oil conditions.

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

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

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

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

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

In this case, the step (Sb) includes the step (Sb-1) of comparing the processing condition with the processing stable region, and when it is determined that the processing condition is located in a processing unstable region outside the processing stable region, the processing condition 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), a stable processing region that satisfies the surface roughness criterion of the material may 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 may be arranged as a priority. have.

The method of deriving the optimal processing conditions of the present invention for solving the above problems can derive the optimized processing conditions for each operation through the processing stability evaluation of processing equipment and materials. It has the advantage of greatly improving the processing quality as it is performed.

In addition, according to the optimized machining, it is possible to maximize the service life by minimizing the wear amount of the tool, and has the advantage of reducing the overall machining cost.

The effects of the present invention are not limited to the above-mentioned effects, 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 of deriving an optimum processing condition according to an embodiment of the present invention;
FIG. 2 is a diagram showing a detailed process of step (Sb) comparing a processing condition and a stable processing region in a method for deriving an optimum processing condition according to an embodiment of the present invention; And
3 is a diagram illustrating a process of comparing a processing condition and a processing stability region through software in which an algorithm is implemented in a method for deriving an optimum processing condition according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention in which the object of the present invention can be realized in detail will be described with reference to the accompanying drawings. In the description of the present embodiment, the same names and the same reference numerals are used for the same components, and additional descriptions thereof will be omitted.

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

As shown in Fig. 1, the method of deriving the optimum processing conditions according to an embodiment of the present invention is based on the step (a) of selecting a plurality of processing conditions and the plurality of processing conditions selected in the step (a). Step (b) of performing an analysis for each selected item selected, step (c) of selecting a processing material and a processing tool, and optimizing the plurality of processing conditions based on the analysis result in step (b); (D) extracting a processing stable region for the processing conditions optimized by the (c) step, and (e) arranging the plurality of processing conditions in order of priority according to a preset arrangement criterion, and the And (f) determining an optimum processing condition based on the processing stability region and the processing condition.

The step (a) is a process of deriving predetermined conditions for a tool or fluid used during processing such as processing tool, lubrication/cooling, cutting oil, etc., for example, the plurality of processing conditions include RPM, feed, depth of cut of the processing tool, At least one or more of a lubrication/cooling condition and a cutting oil condition may be included.

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

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

Then, in step (c), the processing material and 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 step (b).

That is, the step (c) can optimize the processing conditions for the selected processing material and processing tool by reflecting the result of the basic analysis performed in advance while the processing material and processing tool for performing processing are selected. have.

In the step (d), the processing conditions optimized by the step (c) are applied to the stability evaluation table derived from the software implemented according to the algorithm of the present invention to extract the processing stability region.

That is, step (d) is a process to determine whether or not processing stability is secured when processing is performed under the currently selected processing conditions.

Meanwhile, prior to step (d), step (Sa) of extracting the dynamic stiffness of the machining tool may be further performed. In this case, step (d) is Based on the stiffness and the processing conditions, the processing stability region may be extracted.

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

In addition, between step (d) and step (e), 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 step (Sb) 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.

As shown in Fig. 2, the step (Sb) includes the step (Sb-1) of comparing the processing condition with the processing stable region, and the processing condition is positioned in a processing unstable region outside the processing stable region. If it is determined, it includes a step (Sb-2) of correcting the processing conditions to be positioned toward the processing stable area.

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

However, when it is determined that the processing conditions are located in the processing unstable area outside the processing stable area, the processing conditions are corrected to be located toward the processing stable area.

At this time, in the step (b), the selection item may further include the surface roughness of the material, and in this case, the step (Sb-2) re-elicits a processing stable region that satisfies the surface roughness criterion of the material. I can.

Further, after the processing stability region is re-derived, the processing conditions and the processing stability region are re-compared, and the above process including steps (Sb-1) and (Sb-2) may be repeated according to the result.

3 is a diagram showing a process of comparing a processing condition and a processing stability region through software in which an algorithm is implemented in a method for deriving an optimum processing condition according to an embodiment of the present invention.

3 shows an example in which the derived stability evaluation table is visualized through software, where the blue area is the processing stable area, and the other areas are the processing unstable area.

That is, in this software, if the processing conditions selected in step (c) are not located within the blue area, the processing stability area that satisfies the surface roughness standard of the material is re-derived, and n repetitive operations are performed so that the processing conditions are located within the blue area. You can do it.

Thereafter, step (e) of arranging the plurality of processing conditions in order of priority according to a preset arrangement criterion and step (f) of determining the optimum processing conditions based on the processing stability region and the processing conditions are performed. In this way, machining conditions optimized for the work to be performed are derived.

At this time, in step (b), the selection item may include a tool wear degree and a material removal rate, and in this case, step (e) prioritizes a processing condition representing the maximum material removal rate based on the tool wear rate. It can be arranged by

However, such a priority condition is presented as an embodiment, and it is a matter of course that the priority condition may be arbitrarily determined according to various criteria.

As described above, preferred embodiments according to the present invention have been examined, and the fact that the present invention can be embodied in other specific forms without departing from its spirit or scope other than the above-described embodiments is known to those skilled in the art. It is self-evident 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 and may be modified within the scope of the appended claims and their equivalents.

Claims (10)

(A) selecting a plurality of processing conditions;
Step (b) of performing an analysis for each predetermined selection item according to a 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 step (b);
(D) extracting a processing stable region for the processing conditions optimized by the (c) step;
(E) arranging the plurality of processing conditions in order of priority according to a preset arrangement criterion; And
(F) determining an optimum processing condition based on the processing stable region and the processing condition;
Optimal processing condition derivation method comprising a. The method of claim 1,
In step (a),
The plurality of machining conditions is a method of deriving an optimum machining condition including at least one of at least one of RPM, feed, cut amount, lubrication/cooling condition, and cutting oil condition of the machining tool. The method of claim 1,
In step (b),
The selection item is a method of deriving an optimum processing condition including at least one or more of tool wear, material removal rate, and surface roughness of the material. The method of claim 1,
Before step (d),
A method of deriving the optimal processing conditions in which the step (Sa) of extracting the dynamic stiffness of the processing tool is further performed. The method of claim 4,
The step (d),
A method of deriving an optimum processing condition for extracting a processing stable region based on the dynamic stiffness of the processing tool extracted in step (Sa) and the processing condition. The method of claim 1,
The step (d),
A method of deriving an optimum processing condition performed by considering at least one of the depth of cut in the axial direction and the radial direction according to the RPM of the processing tool. The method of claim 1,
Between the step (d) and step (e),
The method of deriving the optimum processing conditions in which the step (Sb) of comparing and processing the processing conditions and the processing stable region is further performed. The method of claim 7,
The (Sb) step,
(Sb-1) comparing the processing conditions and the processing stable region; And
(Sb-2) correcting the processing conditions to be positioned toward the processing stable area when it is determined that the processing conditions are located in the processing unstable area outside the processing stable area;
Optimal processing condition derivation method comprising a. The method of claim 8,
In step (b),
The selection items above include the surface roughness of the material,
The (Sb-2) step,
A method of deriving the optimum processing conditions to re-derive the processing stability area that satisfies the surface roughness standard of the material. The method of claim 1,
In step (b),
The selection items above include tool wear and material removal rate,
The step (e),
A method of deriving an optimum processing condition in which processing conditions representing the maximum material removal rate based on the tool wear are arranged as a priority.

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