JP2007054880A - Laser machining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laser machining method capable of shortening the total machining time by reducing the ratio of the piercing hole opening time occupied in the unit machining time while leaving the opening of a piercing hole necessary for the machining procedure. <P>SOLUTION: In this laser machining method, when the nesting data 1 consisting of a plurality of members are generated out of one blank 2, and the blank layout of the plurality of members is performed by the laser cutting according to the nesting data 1, the piercing hole opening data in the nesting data 1 are provided common to a plurality of sets of member cutting data 13, 15, and a runway line 12 is formed toward each member communized with the piercing hole opening data from the piercing hole 21 opened based on the piercing hole opening data. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a laser processing method for generating nesting data composed of a plurality of members for one original plate and taking materials of the plurality of members by cutting laser processing according to the nesting data.

  In the present invention, the nesting data includes “piercing hole drilling data”, “running line formation data”, and “member cutting data”, and those that have been drilled or cut based on the data are referred to as “piercing hole” and “running line”. And “members”.

  When multiple members are taken from one original plate by laser processing, nesting data for the original plate is generated based on the CAD data of each member, and the laser processing machine is controlled based on the NC data created from this nesting data To do. Conventionally, since each member is independent, as shown in FIG. 5 of Patent Document 1, piercing hole drilling data is provided for each member cutting data, and each drilled piercing hole is directed to each member. The running line was formed according to the running line formation data. That is, the nesting data for the original plate is a simple combination of the nesting data for each member.

JP 2000-079488

  The unit processing time required when material is taken from each member from one original plate is the time for forming a piercing hole in the original plate (piercing hole drilling time), and the time for forming a running line from the piercing hole toward each member ( It consists of the total of the time required to cut the outer shape of each member (member cutting time). Further, the total processing time for taking all members from one original plate is the total of unit processing time required for each member.

  If the total processing time required for material removal is short, the number of original plates to be subjected to laser processing can be increased. In this respect, since the member cutting time is determined by the shape of the member, the time cannot be shortened. Also, the run-up line formation time does not contribute much to time reduction because the proportion of the unit machining time is small. On the other hand, the piercing hole drilling time tends to increase in proportion to the plate thickness, and the ratio of tightening to the unit processing time is large, which is a problem.

  However, in order to suppress the adhesion of the melted material (hereinafter referred to as “dross”) by laser processing and take a good quality material, the procedure for forming the run-up line from the drilled piercing hole to each member is as follows: necessary. In view of this, a study was conducted to reduce the ratio of the piercing hole drilling time to the unit machining time while reducing the total machining time while leaving the piercing holes necessary for the machining procedure.

  What was developed as a result of the study was to generate nesting data consisting of a plurality of members for a single original plate, and to cut the materials of the plurality of members by laser processing cutting according to the nesting data. Piercing hole drilling data is commonly provided for a plurality of member cutting data, and laser processing is performed to form a running line from the piercing hole drilled based on the piercing hole drilling data to each member that shares this piercing hole drilling data. Is the method.

  In the laser processing method of the present invention, when taking the material of the first member, a piercing hole common to the plurality of members including the first member is drilled, and when taking the material of the subsequent second member, Without piercing the piercing hole, the laser beam is emitted back to the piercing hole previously drilled, and a running line is formed toward the second member. As a result, the piercing hole drilling time is not required for the second and subsequent members, and the unit processing time and further the total processing time can be shortened accordingly.

  Here, the “piercing hole” referred to in the present invention includes not only a piercing hole in a narrow sense that is drilled by a laser of a laser processing machine, but also a starting end hole that is opened around this piercing hole and forms the starting end of the run-up line. Including. Since each member is separated from the piercing hole (the piercing hole in the narrow sense or the start end hole) by the run-up line, even if dross is generated when the laser is fired back to the piercing hole drilled earlier, There is no possibility that a plurality of members having a common piercing hole will be affected.

  The piercing hole drilling data in the nesting data may be provided on an intermediate line between two adjacent member cutting data. Even if the piercing hole drilling data is shared by two adjacent member cutting data, the unit machining time and further the total machining time can be reduced to about half. Also, by providing the piercing hole drilling data on the intermediate line between two adjacent member cutting data, the running line toward each member becomes substantially equal, and the increase in the running line formation time due to the common piercing hole is suppressed. Or it can be prevented. From this, it is preferable to provide the piercing hole drilling data in the nesting data at an intermediate point that is substantially equidistant from each of three or more adjacent member cutting data.

  The present invention has the effect of reducing the number of necessary piercing holes as the number of members allocated to one piercing hole is increased, that is, reducing the ratio of the piercing hole drilling time to the unit processing time, thereby reducing the total processing time.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an example of an original plate fitted with nesting data 1 generated according to the present invention, and FIGS. 2 to 7 show piercing hole drilling data 11 on an intermediate line between two adjacent member cutting data 13,15. FIG. 2 is a partial perspective view in FIG. 1 showing a procedure for taking a material by laser processing in accordance with nesting data 1 provided, FIG. 2 is a drilling procedure for piercing holes 21, and FIG. 3 is a formation of a run-up line 22 toward the first member 23. 4 is a cutting procedure of the first member 23, FIG. 5 is a returning procedure for returning the laser nozzle 3 onto the piercing hole 21, FIG. 6 is a restarting procedure for firing the laser 31 into the piercing hole 21, and FIG. The run-up line formation procedure toward the member 25 is shown respectively. The member cutting data 13 and 15 in each figure are widely spaced for convenience of explanation.

  2 to 7, the original plate 2 and the laser nozzle 3 are separated from each other so that the laser 31 to be emitted can be seen. However, this is for convenience of explanation, and the laser 31 cannot actually be seen. The laser nozzle 3 is closer to the original plate 2. Further, in each figure, the nesting data 1 including the piercing hole drilling data 11, the running line forming data 12, 14 and the member cutting data 13, 15 is displayed by a broken line, and the piercing hole 21, the running lines 22, 24 and the member 23, 25 is indicated by a solid line.

  As shown in FIG. 1, the nesting data 1 for the original plate 2 is generated so that material can be efficiently taken based on the CAD data of each member. In this example, in order to make two piercing holes of the same kind and to share a piercing hole, the member cutting data 13 and 15 are arranged two by two in a point-symmetrical positional relationship around the piercing hole drilling data 11. . From now on, the piercing hole drilling data 11 in the nesting data 1 will be provided on the middle line M of the two member cutting data 13, 15 as a set, and the run toward the same position of each member cutting data 13, 15 The line formation data 12 and 14 have the same length.

  The material removal according to the nesting data 1 follows the following procedure. First, as seen in FIG. 2, the laser 31 is first emitted from the laser nozzle 3 according to the piercing hole drilling data 11, and the piercing hole 21 is drilled in the original plate 2. For example, when a piercing hole 21 is drilled in a stainless steel original plate 2 using a laser with an output of 4 kW, the piercing hole drilling time is about 1 second if the plate thickness is 1 mm, but if the plate thickness is 9 mm. Piercing hole drilling time is about 7 seconds. From this, it is understood that the present invention becomes more effective as the thickness of the original plate 2 increases.

  When the piercing hole 21 has been drilled, the material removal for the first member 23 is the same as in the prior art. As shown in FIG. 3, the laser nozzle 3 is moved from the piercing hole 21 according to the running line formation data 12, and the running line 22 is moved. After the formation, the member 23 is cut by moving the laser nozzle 3 in accordance with the member cutting data 13 as seen in FIG.

  The feature of the present invention is that, after finishing the material removal of the first member 23, as shown in FIG. 5, the laser emission is temporarily suspended and the laser nozzle 3 is moved onto the piercing hole 21 previously drilled. The material removal of the second member 25 is performed using the piercing hole 21. The moved laser nozzle 3 resumes the firing of the laser 31 to the already drilled piercing hole 21 as seen in FIG. 6, and subsequently the second member as seen in FIG. The run-up line 24 is formed by moving the laser nozzle 3 toward the member cutting data 15 in FIG. By using the piercing hole 21 that has already been drilled when taking the material of the second member, the piercing hole drilling time in the unit machining time of this second member can be omitted, and the total machining time is also shortened. Is done.

  FIG. 8 is a perspective view showing another example of the original plate 2 fitted with the nesting data 1 generated according to the present invention. When the piercing holes are made common to a larger number of members, as shown in FIG. 8, the four adjacent members are point-symmetric and line-symmetrical with respect to the piercing hole drilling data 11 in the nesting data 1. When cutting data 13,15,17,19 are arranged, run-up line formation data 12,14,16,17 is provided from the piercing hole drilling data 11 to each member cutting data 13,15,17,19. Good.

  The number of member cutting data assigned to the piercing hole drilling data is determined in consideration of the shape and size of each member. Nesting data consisting of piercing hole drilling data, run-up line formation data, and member cutting data can be freely generated by software based on the CAD data of the member, so the number of member cutting data assigned to piercing hole drilling data is also free Can be changed.

It is a perspective view showing the example of the original plate which fitted the nesting data produced | generated according to this invention. FIG. 2 is a partial perspective view in FIG. 1 showing a piercing hole drilling procedure. It is a fragmentary perspective view in FIG. 1 showing the formation procedure of the run-up line toward the first member. It is a fragmentary perspective view in FIG. 1 showing the cutting procedure of the first member. FIG. 2 is a partial perspective view in FIG. 1 illustrating a returning procedure for returning a laser nozzle onto a piercing hole. FIG. 2 is a partial perspective view in FIG. 1 illustrating a resumption procedure for emitting a laser to a piercing hole. It is a fragmentary perspective view in FIG. 1 showing the run-up line formation procedure toward the 2nd member. It is a perspective view showing another example of the original plate which fitted the nesting data produced | generated according to this invention.

Explanation of symbols

1 Nesting data
11 Piercing hole drilling data
12 First line run-up line formation data
13 Part cutting data for the first part
14 Run-up line formation data of the second member
15 Part cutting data for the second part
16 Run-up line formation data for the third member
17 Member cutting data for third member
18 Run-up line formation data for the 4th member
19 Material cutting data of the 4th member 2 Original plate
21 Piercing hole
22 First member run-up line
23 First part
24 The run-up line of the second member 3 Laser nozzle
31 laser

Claims (3)

When nesting data composed of a plurality of members is generated for one original plate and the material of the plurality of members is removed by laser processing cutting according to the nesting data, a plurality of piercing hole drilling data in the nesting data is generated. A laser machining method, characterized in that a running line is formed from a piercing hole provided in common with member cutting data to each member that shares the piercing hole drilling data from a piercing hole drilled based on the piercing hole drilling data. 2. The laser processing method according to claim 1, wherein the piercing hole drilling data in the nesting data is provided on an intermediate line between two adjacent member cutting data. 2. The laser processing method according to claim 1, wherein the piercing hole drilling data in the nesting data is provided at an intermediate point that is substantially equidistant from each of the three or more adjacent member cutting data.

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