KR20140048766A - Workpiece setting methods for machining using machining center - Google Patents

Abstract

The present invention relates to a workpiece setting method for machining workpieces using a machining center and, more specifically, to a workpiece setting method for machining workpieces using a machining center, capable of accurately machining workpieces without matching the moving direction of a worktable with the straightness of the workpieces by setting multiple reference points on the workpieces placed on the worktable of the machining center and calculating machining reference points using the positional relation between the reference points. The workpiece setting method for machining workpieces using a machining center according to the present invention comprises a workpiece installation step of placing the workpieces to be machined on the worktable of the machining center; a central point setting step of setting the central machining points on the workpieces placed on the worktable; and a machining center setting step of setting the processing conditions of the machining center corresponding to the set central machining points. [Reference numerals] (S10) Workpiece installation step; (S20) Central point setting step; (S22) Reference hole setting step; (S24) Workpiece setting step; (S26) Operation step; (S30) Machining center setting step

Description

Technical Field [0001] The present invention relates to a workpiece setting method for machining center machining,

The present invention relates to a method of setting a workpiece for machining center, more particularly, to a method of setting a plurality of reference points on a workpiece placed on a work table of a machining center, So that accurate machining of the workpiece can be performed without matching the moving direction of the work table and the straightness of the workpiece.

In general, a machining center is a machine for obtaining a product by cutting a workpiece having a heavy weight in a direction to be processed by the tool, and it is possible to perform multi-axis machining and multi-step machining in one setting Therefore, it is mainly used for processing small quantity parts of various kinds.

At this time, when working with a machining center, a heavy-weight workpiece is placed on a machining table. In order to perform more accurate machining, a straight line including the origin of the workpiece and a straight line of the machining center, The transport direction should be parallel.

In order to align the workpiece with the machining center, a worker hits the workpiece using a mechanism such as a hammer to rotate the workpiece on the work table finely in one direction. In this method, There is a problem that the setting time of the workpiece is long and the setting can be made inaccurately according to the skill level of the operator.

More specifically, in setting the workpiece on the machining center, the workpiece to be machined is first moved onto the work table to fix the workpiece temporarily, thereby locating the workpiece on the work table and then centering the reference hole for machining .

After that, the workpiece is set so that the axis of the work including the reference hole of the workpiece and the axis of the work table are in parallel with each other, and then the work is started with the clamp fixed.

However, the setting method as described above requires a long time for setting the work table because it is artificially performed by a worker, such as a process of temporarily fixing the center of the work table and a process of adjusting the workpiece and the work table to be parallel to each other. There is also a risk of safety accidents.

Also, Korean Patent Laid-Open Publication No. 10-2007-0105904 discloses a device for precise positioning of a workpiece and a method of positioning the workpiece by a conventional technique for setting a workpiece, and its main technical configuration is a table top surface and a variable method Providing a lift table having at least first and second legs capable of setting the lengths of the legs, placing the workpiece on the table top surface, and positioning the workpiece about the first and second virtual rotational axes And setting the inclination of the upper surface of the table so that at least the lengths of the first and second legs can be adjusted to set the exact position of the workpiece. However, this method includes the first and second legs There is a disadvantage that it can only be applied to a table on which a table is placed, and after arranging the workpiece on the table surface, And adjusting the positions of the workpieces by using the first and second legs.

It is an object of the present invention to provide a machining center machining method capable of accurately setting a workpiece without moving a workpiece by a physical setting method. And to provide a method for setting a workpiece.

According to an aspect of the present invention,

A workpiece setting method for machining a machining center, the method comprising: a workpiece mounting step of placing a workpiece to be machined on a work table of a machining center; a center point setting step of setting a machining center point on the workpiece placed on the work table; And a machining center setting step of setting a machining condition of the machining center in accordance with the center point.

The center point setting step may include a reference hole setting step of setting a plurality of reference holes on the workpiece, a workpiece fixing step of fixing the workpiece on the work table, an operation of calculating a machining center point The method comprising the steps of:

In the reference hole setting step, three reference holes are set. In the calculating step, one of the three reference holes is set as the origin, and then the machining center point is calculated by the trigonometrical method to calculate the moving distance from the origin and the rotation angle .

In this case, the machining center point is a line segment connecting the reference hole corresponding to the origin among the three reference holes and another reference hole, and an intersection perpendicular to the line segment from the remaining reference holes.

In the machining center setting step, a machining center is set by inputting a moving distance and a rotation angle from the origin into a G code.

According to the present invention, it is possible to set the workpiece on the machining center without moving the workpiece by the physical setting method, thereby simplifying the workpiece setting process, thereby reducing the time and cost required for setting the workpiece .

Further, according to the present invention, it is possible to prevent a safety accident occurring in the work setting process by minimizing the participation of the worker directly in the setting of the work.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart illustrating a workpiece setting method for machining center machining according to the present invention; FIG.
2 schematically shows an example of a reference hole set on a workpiece;
FIG. 3 is a schematic view illustrating a concept used in an arithmetic process in an arithmetic step of a method of setting a workpiece for machining a machining center according to the present invention; FIG.

Hereinafter, a preferred embodiment of a method of setting a workpiece for machining a machining center according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a flow chart showing a method of setting a workpiece for machining center according to the present invention, FIG. 2 is a view schematically showing an example of a reference hole set on a workpiece, FIG. 3 is a view showing a workpiece for machining center machining FIG. 2 is a schematic view illustrating a concept used in an arithmetic operation in an arithmetic operation.

The present invention is characterized in that a plurality of reference points are set on a workpiece placed on a work table of a machining center and the machining reference point is determined by using the positional relationship between the reference points so that accurate machining of the workpiece A workpiece mounting step S10, a center point setting step S20, and a machining center setting step S30, as shown in FIG. 1, .

More specifically, the step of installing the workpiece (S10) relates to a step of placing the workpiece to be machined on a work table provided in a machining center. In order to align the workpiece and the work table in the moving direction, Since the workpiece must be hammered by a hammer or the like manually, it is necessary to temporarily fix the work table by using the fixing pin in a state where the workpiece is placed on the work table in order to prevent the work table from shaking The workpiece mounting step S10 can be performed by merely placing the workpiece on the work table since it is not necessary to perform a separate straightening operation, that is, a work for aligning the corner portion of the workpiece with the movement direction of the work table, Is completed.

Next, the center-point setting step (S20) relates to a step of setting a machining center point to be machined using a machining center by generating arbitrary coordinates on a workpiece placed in the work table, It is possible to omit the operation of matching the straightened workpiece and the straightness in the moving direction of the work table, thereby reducing the time and cost required for setting the workpiece.

More specifically, the center-point setting step S20 includes a reference hole setting step S22, a workpiece fixing step S24, and an arithmetic operation step S26, A reference hole for setting a machining center point of a workpiece placed on a table is conventionally set by repeating a reference hole a total of six times in order to match the straightness of the workpiece in the moving direction of the work table In contrast, in the present invention, as shown in FIG. 2, since three reference holes can be arbitrarily set so that the machining center point can be calculated, the time required for setting the reference hole can be greatly reduced.

Next, the work fixing step S24 is a step of fixing a workpiece to a work table using a clamp, which is the same as the process of fixing a conventional workpiece on a work table. However, in the present invention, The workpiece and the work table are configured to fix the workpiece immediately after the reference hole is selected without any alignment operation.

Next, the operation step S26 relates to a step of calculating a machining center point using the position of the reference holes set in the reference hole setting step S22, and the calculation of the machining center point uses a trigonometric function technique.

That is, a virtual XY coordinate axis having one reference hole as the origin of the reference holes set in the reference hole setting step S22 is generated, and the X and Y coordinates of the remaining reference holes are obtained from the coordinate axis, And the processing center point is calculated by the trigonometric function method using the position information.

At this time, the machining center point is an intersection point that intersects a line connecting the two reference holes of the set reference holes and a line segment connecting the two reference holes from the remaining reference holes, and sets the intersection point as the machining center point It is possible to perform accurate machining using a machining center without a separate workpiece setting process for matching the straightness with the movement direction of the work table.

More specifically, as shown in FIG. 3, when the reference holes set in the reference hole setting step S22 are O, A, and B, an X-Y coordinate axis having O as the origin is virtually created. In this case, since at least three reference holes are required to calculate the machining center point by the trigonometric function technique, the calculation process of the machining center point will be described based on the case where there are three reference holes.

First, the reference hole O is set as the origin by using the machining center, and the X, Y coordinate values corresponding to the reference hole A and the reference hole B are obtained from the reference hole O.

와, 기준홀 O를 중심으로 하는 기준홀 B와 X축 사이의 각도인

및 기준홀 O를 중심으로 하는 기준홀 A와 기준홀 B 사이의 각도인

는 각각 다음과 같이 나타낼 수 있다.When the coordinate value of the reference hole A is (Xa, Ya) and the coordinate value of the reference hole B is (Xb, Yb), the angle between the reference hole A and the X-

And an angle between the reference hole B centered at the reference hole O and the X axis

And an angle between the reference hole A and the reference hole B centered on the reference hole O

Can be expressed as follows.

... (1)

... (One)

... (2)

... (2)

... (3)

... (3)

이 되고, 이로부터 L을 다음과 같은 식에 의해 구할 수 있다.At this time, if the distance from the reference hole O to the reference hole B is L,

And L can be obtained from the following equation.

... (4)

... (4)

In this case, when a crossing point that vertically intersects the reference hole B with respect to a machining center point, that is, a line segment connecting the reference hole O and the reference hole A is C, a distance from the reference hole O to the machining center C is L ' When the X, Y coordinate values of the center point C are (Xc, Yc), L 'and Xc, Yc can be expressed by the following equations respectively from the geometric relationships shown in FIG.

... (5)

... (5)

... (6)

... (6)

... (7)

... (7)

를 구할 수 있게 되어 가공 중심점 C의 위치를 연산할 수 있게 된다.Therefore, the X and Y coordinate values of the machining center C can be obtained using the above equations (6) and (7), and the machining center point C Rotation angle

So that the position of the machining center C can be calculated.

At this time, the equation (5) can be obtained by using the equations (4) and (3)

... (8)

... (8)

And the X and Y coordinate values of the machining center C are substituted by the expressions (8) and (1) into the expressions (6) and (7)

... (9)

... (9)

... (10)

... (10)

(Xa, Ya) and (Xb, Yb) of the reference hole A and the reference hole B using the equations (9) and (10) The Y coordinate values (Xc, Yc) can be calculated.

와 동일하므로, 전술한 (1)식을 이용하여 마찬가지로 기준홀 A의 X,Y 좌표값만으로 연산할 수 있게 된다.The rotation angle of the processing center point C about the origin, that is, the center of the reference hole O is the angle between the reference hole A and the X axis centered on the reference hole O

, It is possible to perform calculation using only the X and Y coordinate values of the reference hole A by using the above-mentioned equation (1).

)을 입력하여 머시닝센터를 이용한 가공을 하게 되면 공작물의 물리적인 세팅과 동일한 효과를 얻을 수 있게 된다.Next, the machining center setting step S30 is to set the machining conditions of the machining center in accordance with the machining center point set in the above-described center-point setting step S20. Enter the distance value to move to the machining center point and calculate the calculated rotation angle (

) And machining using a machining center, the same effect as the physical setting of the workpiece can be obtained.

를 G코드로 머시닝센터에 입력하면, 머시닝센터는 공구를 가공 중심점으로 이동시킨 후 가공을 시작하게 되고, 이와 같은 가공은 작업자가 해머 등을 이용하여 공작물을 정확히 정렬시킨 후 이루어지는 가공과 동일한 효과를 얻을 수 있게 되는 것이다.More specifically, in the machining center setting step S30, the X and Y coordinates of the machining center point C calculated through the calculation step S26 of the center point setting step S20 and the distance L from the reference hole O to the machining center point The distance L 'from the reference hole O to the machining center, and the rotation angle of the machining center around the reference hole O. In this case,

Is entered into the machining center by the G code, the machining center moves the tool to the machining center and starts machining. This machining is the same as the machining after the worker has precisely aligned the workpiece using a hammer It will be possible to obtain.

Therefore, according to the method of setting a workpiece for machining a machining center according to the present invention, it is possible to set a workpiece on a machining center without moving the workpiece by a physical setting method, thereby simplifying a workpiece setting process, The present invention provides an excellent effect of reducing the time and cost required for the setting. In detail, in comparison with a conventional setting method of a general work, in the conventional process of setting a work table, In the present invention, since it is not necessary to temporarily fix the work table using the fixed key, the work table can be set in about 30 seconds. .

Next, in the related art, since the reference hole setting is repeated about 6 times in total in the process of setting the reference hole, it took about 6 minutes. In contrast, in the present invention, It takes time.

In addition, in the prior art, it takes about 3 minutes to physically set the workpiece using a hammer, etc. In the present invention, it takes about 30 seconds to calculate the machining center point. It is possible to shorten the total setting time of the workpiece by about 8 minutes.

Since the number of times the workpiece can be machined is increased by shortening the setting time as described above, the temporary fixing process of the work table using the fixed key and the physical alignment process of the workpiece using the hammer or the like are unnecessary, And fatigue, the cost for machining the workpiece can be drastically reduced.

Although the preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of this invention.

The present invention relates to a method of setting a workpiece for machining center, more particularly, to a method of setting a plurality of reference points on a workpiece placed on a work table of a machining center, So that accurate machining of the workpiece can be performed without matching the moving direction of the work table and the straightness of the workpiece.

S10: Workpiece installation step S20: Center point setting step
S22: reference hole setting step S24: workpiece fixing step
S26: Operation step S30: Machining center setting step

Claims (5)

A method of setting a workpiece for machining center machining,
A workpiece mounting step of placing a workpiece to be machined on a work table of a machining center,
A center point setting step of setting a machining center point on the workpiece placed on the work table,
And a machining center setting step of setting machining conditions of the machining center in accordance with a set machining center point.
The method of claim 1,
The center point setting step,
A reference hole setting step of setting a plurality of reference holes on a workpiece;
A workpiece fixing step of fixing the workpiece on a worktable;
And a calculation step of calculating a machining center point by using the position of the set reference hole.
3. The method of claim 2,
In the reference hole setting step, three reference holes are set,
Wherein in the calculating step, one of the three reference holes is set as the origin, and then the machining center point is calculated by the trigonometric function method, and the machining center point is displayed in terms of the moving distance from the origin and the rotation angle.
The method of claim 3,
Wherein the machining center point is a line segment connecting a reference hole corresponding to an origin among the three reference holes and another reference hole and an intersection perpendicularly intersecting the line segment from the remaining reference holes. .
The method of claim 3,
Wherein in the machining center setting step, a machining center is set by inputting a movement distance and a rotation angle from an origin into a G code.

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