KR102744115B1 - Method of forming a hole in a fastening means where a screw compring a bolt is fastened - Google Patents

Abstract

The present invention relates to a processing method for forming a hole in a fastening means including a bracket to which a screw including a bolt is fastened, by processing a hole including a slot hole corresponding to the shape or form of a body of a coupling means so that a body of the coupling means (screw) can be easily inserted into the fastening means and assembled or fastened, thereby improving the assembling efficiency or the defect rate.

Description

Method of forming a hole in a fastening means where a screw compring a bolt is fastened

The present invention relates to a processing method for forming a hole in a fastening means including a bracket to which a screw including a bolt is fastened, by processing a hole including a slot hole corresponding to the shape or form of a body of a coupling means so that a body of the coupling means (screw) can be easily inserted into the fastening means and assembled or fastened, thereby improving the assembling efficiency or the defect rate.

In general, as shown in domestic public patent 10-2016-0131582 (Title of invention: Fastening bolt), when fastening a bolt, etc., there is a concept of a slot hole, but it does not show how to process the hole, what form to process for which bolt type, etc.

The present invention proposes to process the shape of a hole differently based on the shape of a screw body including a bolt or the thickness information of a steel plate.

In addition, the present invention proposes to vary the hole machining process based on the body shape of the screw including the bolt or the thickness information of the steel plate.

The present invention is to achieve the above-mentioned purpose, and as a first embodiment,

A method for forming a hole in a fastening means so that a connecting means such as a screw including a bolt is fastened to a fastening means including a bracket,

A step in which at least one of the screw body shape and thickness information is input to the control unit based on a user command input unit;

In the case of the above body shape information being a circular type, a slot hole or a long hole will be controlled to be formed in the iron plate corresponding to the bracket, and the step of the iron plate being positioned under the irradiation section of the laser device;

A step in which the thickness of the steel plate is confirmed based on sensor information of the sensor unit or user command input unit information;

A step in which a steel plate or laser irradiation device is moved under the control of a control unit based on information preset and stored in a memory unit according to the confirmed steel plate thickness;

A step in which a laser is irradiated based on cutting processing information that is stored or input in advance based on thickness information of the steel plate; and

A method for forming a hole in a fastening means including a bolt to which a screw is fastened, characterized by including a step of forming a slot hole or a long hole in a steel plate through the above laser irradiation.

As a second embodiment of the present invention, a method for forming a hole in a fastening means so that a connecting means such as a screw including a bolt is fastened to a fastening means including a bracket,

A step in which at least one of the screw body shape and thickness information is input to the control unit based on a user command input unit;

In the case of the above body shape information being a first rectangular or first square type, a second rectangular or second square type having a shape that is 4-6% larger than the size of the first rectangular or first square type will be controlled to be formed on an iron plate corresponding to the bracket, and the iron plate will be positioned under the irradiation section of the laser device;

A step in which the thickness of the steel plate is confirmed based on sensor information of the sensor unit or user command input unit information;

A step in which a steel plate or laser irradiation device is moved under the control of a control unit based on information preset and stored in a memory unit according to the confirmed steel plate thickness;

A step in which a laser is irradiated based on cutting processing information that is stored or input in advance based on thickness information of the steel plate; and

A method for forming a hole in a fastening means including a bolt to which a screw is fastened, characterized by including a step of forming a second rectangular or second square type hole of the expanded shape in an iron plate through the laser irradiation.

The detailed operations for implementing the first and second embodiments are as follows:

1. When the thickness of the steel plate is 6T (6mm) or less,

- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 4-6 mm from the upper surface of the iron plate where the hole is formed.

- Power: 4.6-5.0 KW is authorized.

- Pulse: 4,800-5,200 Hz is applied.

- Time: Performed in 48-52 ms,

2. When the thickness of the steel plate is more than 6T (6mm) but less than 16T (16mm),

1) Primary processing

- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 7 mm from the upper surface of the iron plate where the hole is formed.

- Power: 6.0 KW

- Pulse: 3,000 Hz

- Time: Performed in 1,500 ms,

2) Secondary processing

- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 3 mm from the upper surface of the iron plate where the hole is formed.

- Power: 5.4 KW

- Pulse: 5,000 Hz

- Time: Performed in 400 ms,

3. If the thickness of the steel plate exceeds 16T (16mm),

1) Primary processing

- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 7 mm from the upper surface of the iron plate where the hole is formed.

- Power: 6.0 KW

- Pulse: 3,000 Hz

- Time: 2,000 ms

2) Secondary processing

- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 13 mm from the upper surface of the iron plate where the hole is formed.

- Power: 5.4 KW

- Pulse: 5,000 Hz

- Time: 1,500 ms

3) 3rd processing

- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 18 mm from the upper surface of the iron plate where the hole is formed.

- Power: 6.0 KW

- Pulse: 5,000 Hz

- Time: A method of forming a hole in a fastening means to which a screw including a bolt is fastened, wherein the fastening time is 100 ms.

According to the present invention, since the shape or form of a connecting means such as a screw including a bolt is formed in a hole (a slot hole, a long hole, etc.) in the fastening means, the position does not need to be precisely aligned every time during assembly or fastening, so the assembly efficiency can be improved or the defect rate can be reduced.

Figure 1 is a drawing showing a system for forming a slot hole in a fastening means so that a connecting means such as a screw including a bolt is fastened to the fastening means.
Figure 2 is an operation flow diagram of one embodiment showing a processing method in which a hole is formed based on the shape or appearance of a coupling means through the system of Figure 1.
Figure 3 is a drawing showing a slot hole/long hole shape formed in a fastening means corresponding to a body shape or shape of a screw or other fastening means including a bolt that is circular.
Figure 4 is a drawing showing an enlarged rectangular shape formed in a fastening means corresponding to a case where the body shape or shape of a connecting means such as a screw including a bolt is rectangular.
Figure 5 is a drawing showing an enlarged square shape formed in a fastening means corresponding to a body shape or shape of a connecting means such as a screw including a bolt being square.
Figures 6 and 7 are drawings showing actual hole processing according to the technical idea of the present invention using a laser method.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In describing embodiments of the present invention, if a detailed description of a related known configuration or function is judged to hinder understanding of the embodiments of the present invention, the detailed description will be omitted.

In addition, when describing components of an embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by the terms.

Additionally, when a component is described as being "connected," "in contact with," "coupled to," or "connected to" another component, it should be understood that the component may be directly connected or coupled to that other component, but that there may also be another component "connected," "coupled to," or "connected" between the components.

In explaining the embodiments of the present invention, a screw is a concept including all bolts, and a connecting means includes all components used to connect with a fastening means including a bracket, and the technical idea of the present invention is applied thereto.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

Figure 1 is a drawing showing a system for forming a slot hole in a fastening means so that a connecting means such as a screw including a bolt is fastened to the fastening means.

FIG. 2 is an operation flow diagram of one embodiment showing a processing method in which a hole is formed based on the shape or appearance of a coupling means through the system of FIG. 1.

Figure 3 is a drawing showing a slot hole or a long hole shape formed in a fastening means corresponding to a body shape or shape of a screw or other fastening means including a bolt that is a perfect circle (a circle whose width and length of the inner diameter are the same).

Figure 4 is a drawing showing an enlarged rectangular shape formed in a fastening means corresponding to a body shape or shape of a connecting means such as a screw including a bolt, which is rectangular.

Figure 5 is a drawing showing an enlarged square shape formed in a fastening means corresponding to a body shape or shape of a connecting means such as a screw including a bolt being square.

FIGS. 6 and 7 are drawings showing actual hole processing according to the technical idea of the present invention using a laser method.

As shown in Fig. 1, an embodiment of the present invention is a system for processing a hole using a laser device (100).

The operation of each component (control unit, memory unit, user command input unit, display unit, sensor unit, etc.) will be explained through the flow chart in Fig. 2. The explanation of the configuration in which general operations are implemented is omitted because it is known in this field. Operations by general configurations may be added later.

FIG. 2 is a flow chart illustrating a processing method for forming a slot hole, or in other words, a hole (a type of hole with different width and length of inner diameter) in a fastening means including a bracket, as a first embodiment.

A method for forming a hole in a fastening means so that a connecting means such as a screw including a bolt is fastened to a fastening means including a bracket,

At least one of the body shape and thickness information of the screw (not shown) is input into the memory unit (120) or/and the control unit (110) based on the user command input unit (130). (S 201)

In the case where the above body shape information is of the true circle (a circle with substantially the same inner diameter) type, a slot hole or a long hole (300 in FIG. 3) will be controlled to be formed in the steel plate (200) corresponding to the bracket, and the steel plate will be positioned under the irradiation section (150) of the laser device by a moving device (not shown) (S 203);

Step (S 205) in which the thickness of the iron plate (200) in which a hole (300) is to be formed is confirmed based on the sensed sensor information of the sensor unit (160) or the information of the user command input unit (130);

Step (S 207) in which the steel plate (200) or the laser irradiation device (150) is moved under the control of the control unit (110) based on information preset and stored in the memory unit (120) according to the confirmed steel plate thickness;

Step (S 209) in which the control unit irradiates the laser based on cutting processing information pre-stored in the memory unit (120) based on the thickness information of the steel plate or input through a user command input unit (130) including a mouse, keyboard, etc.; and

A method for forming a hole in a fastening means including a bolt to which a screw is fastened, characterized by including a step (S 211) in which a slot hole or a long hole is formed in a steel plate (Fig. 3) through the above laser irradiation.

As a second embodiment of the present invention, as shown in FIGS. 4 and 5, this is an embodiment of forming a hole in an iron plate.

Except for the characteristics of the hole, the actual basic operation implementation is understood by referring to the first embodiment above.

A method for forming a hole in a fastening means so that a connecting means such as a screw including a bolt is fastened to a fastening means including a bracket,

A step in which at least one of the screw body shape and thickness information is input to the control unit based on a user command input unit;

In the case of the above body shape information being a first rectangular or first square type, a second rectangular or second square type having a shape that is expanded by 4-6% in at least two axes among the X, Y, and Z axes more than the size of the first rectangular or first square type is formed on an iron plate corresponding to the bracket, and the iron plate is positioned under the irradiation section of the laser device;

In the case of expansion below 4% in the above, the assembly performance and defect rate increased rapidly and resulted in poor results. For example, the assembly performance/defect rate increased by 15% at 3%, 20% at 2%, and 35% at 1%.

Meanwhile, when it exceeds 6%, the assembly itself improves, but the bonding strength of the screw to the bracket decreases by more than 15%.

Based on the above results, it can be seen that the critical meaning by the above numbers is clearly explained.

A step in which the thickness of the steel plate is confirmed based on sensor information of the sensor unit or user command input unit information;

A step in which a steel plate or laser irradiation device is moved under the control of a control unit based on information preset and stored in a memory unit according to the confirmed steel plate thickness;

A step in which a laser is irradiated based on cutting processing information that is stored or input in advance based on thickness information of the steel plate; and

A method for forming a hole in a fastening means including a bolt to which a screw is fastened, characterized by including a step of forming a second rectangular or second square type hole of the expanded shape in an iron plate through the laser irradiation.

Below is the detailed operation of processing holes according to the thickness of the steel plate, which is stored in the memory, and is applied and operated according to the control of the control unit.

1. When the thickness of the steel plate is 6T (6mm) or less,

- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 4-6 mm from the upper surface of the iron plate where the hole is formed or vice versa (moving the iron plate to the nozzle position).

- Power: 4.6-5.0 KW is authorized.

- Pulse: 4,800-5,200 Hz is applied.

- Time: Performed in 48-52 ms,

In the above, when the distance between the laser injection nozzle position and the upper surface of the iron plate is less than 4 mm (when the distance decreases, such as 3->2->1 mm, i.e. the distance increases), the laser irradiation intensity gradually decreases, resulting in a basically low efficiency of more than 20% in terms of working time, etc.

Meanwhile, when the distance exceeds 6 mm (when the separation distance is closer), the laser irradiation intensity increases and the holes become squished, resulting in a 25% increase in assembly/bonding strength, etc.

The results for the above moving distance had additional effects depending on power, pulse, and time, and when the above factors (power, pulse, and time) were below the set value, the effect was even greater, resulting in a lower efficiency of 20%->30%.

In addition, the results for the above moving distance had additional effects depending on power, pulse, and time, and when the set values of the above factors (power, pulse, and time) were exceeded, the effect was further increased, i.e., a low efficiency of 25%->35% occurred.

Based on the above efficiency results, it can be seen that the critical meaning of the above numbers is clearly explained.

2. When the thickness of the steel plate is between 6T (6 mm) and 16T (16 mm), the processing is divided into first and second stages, considering the thickness of the steel plate. Another technical feature of the present invention is that the stages are differentiated and performed based on the thickness information.

1) Primary processing

- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 7 mm from the upper surface of the iron plate where the hole is formed or vice versa (moving the iron plate to the nozzle position).

- Power: 6.0 KW

- Pulse: 3,000 Hz

- Time: Performed in 1,500 ms,

In the above, when the distance between the laser injection nozzle position and the upper surface of the iron plate is less than 7 mm (i.e., the distance is greater), the laser irradiation intensity gradually decreases, resulting in a low efficiency of 18% or more in terms of working time, etc.

Meanwhile, when the distance exceeds 7 mm (when the separation distance approaches closer), the laser irradiation intensity increases and the holes become swollen, resulting in a 25% increase in assembly/bonding strength, etc.

The results for the above moving distance had additional effects depending on power, pulse, and time, and when the above factors (power, pulse, and time) were below the set value, the effect was even greater, resulting in a low efficiency of 18%->27%.

In addition, the results for the above moving distance had additional effects depending on power, pulse, and time, and when the set values of the above factors (power, pulse, and time) were exceeded, the effect was further increased, i.e., a low efficiency of 25%->35% occurred.

Based on the above efficiency results, it can be seen that the critical meaning of the above numbers is clearly explained.

2) Secondary processing

- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 3 mm from the upper surface of the iron plate where the hole is formed or vice versa (moving the iron plate to the nozzle position).

- Power: 5.4 KW

- Pulse: 5,000 Hz

- Time: Performed in 400 ms,

In the above, when the distance between the laser injection nozzle position and the upper surface of the iron plate is less than 3 mm (when it decreases from 2 to 1 mm, i.e. the distance increases), the laser irradiation intensity gradually decreases, resulting in a low efficiency of more than 15% in terms of working time, etc.

Meanwhile, when the distance exceeds 3 mm (when the gap is closer), the laser irradiation intensity increases and the holes become swollen, resulting in a 20% increase in assembly/bonding strength, etc.

The results for the above moving distance had additional effects depending on power, pulse, and time, and when the above factors (power, pulse, and time) were below the set value, the effect was even greater, resulting in a lower efficiency of 15%->25%.

In addition, the results for the above moving distance had additional effects depending on power, pulse, and time, and when the set values of the above factors (power, pulse, and time) were exceeded, the effect was further increased, i.e., a low efficiency of 20%->30% occurred.

Based on the above efficiency results, it can be seen that the critical meaning by the above numbers is clearly explained.

3. When the thickness of the steel plate exceeds 16T (16 mm), the processing is carried out by dividing it into multiple stages, 1st, 2nd, and 3rd, considering the thickness of the steel plate. It is also a feature of the present invention to carry out the processing by differentiating the stages based on the thickness information in this way.

1) Primary processing

- Focusing: Focusing for laser injection is performed by moving the laser injection nozzle position 7 mm from the upper surface of the iron plate where the hole is formed or vice versa (moving the iron plate to the nozzle position).

- Power: 6.0 KW

- Pulse: 3,000 Hz

- Time: 2,000 ms

In the above, when the distance between the laser injection nozzle position and the upper surface of the iron plate is less than 7 mm (i.e., the distance is greater), the laser irradiation intensity gradually decreases, resulting in a low efficiency of 18% or more in terms of working time, etc.

Meanwhile, when the distance exceeds 7 mm (when the separation distance approaches closer), the laser irradiation intensity increases and the holes become swollen, resulting in a 25% increase in assembly/bonding strength, etc.

The results for the above moving distance had additional effects depending on power, pulse, and time, and when the above factors (power, pulse, and time) were below the set values, the effect was even greater, resulting in a lower efficiency of 18%->27%.

In addition, the results for the above moving distance had additional effects depending on power, pulse, and time, and when the set values of the above factors (power, pulse, and time) were exceeded, the effect was further increased, i.e., a low efficiency of 25%->35% occurred.

Based on the above efficiency results, it can be seen that the critical meaning of the above numbers is clearly explained.

2) Secondary processing

- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 13 mm from the upper surface of the iron plate where the hole is formed or vice versa (moving the iron plate to the nozzle position).

- Power: 5.4 KW

- Pulse: 5,000 Hz

- Time: 1,500 ms

In the above, when the distance between the laser injection nozzle position and the upper surface of the iron plate is less than 13 mm (i.e., the distance is longer), the laser irradiation intensity gradually decreases, resulting in a basically low efficiency of more than 10% in terms of working time, etc.

Meanwhile, when the distance exceeds 13 mm (when the separation distance is closer), the laser irradiation intensity increases and the holes become squished, resulting in a 35% increase in assembly/bonding strength, etc.

The results for the above moving distance had additional effects depending on power, pulse, and time, and when the above factors (power, pulse, and time) were below the set value, the effect was even greater, resulting in a low efficiency of 10%->17%.

In addition, the results for the above moving distance had additional effects depending on power, pulse, and time, and when the set values of the above factors (power, pulse, and time) were exceeded, the effect was further increased, i.e., a low efficiency of 35%->45% occurred.

Based on the above efficiency results, it can be seen that the critical meaning of the above numbers is clearly explained.

3) 3rd processing

- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 18 mm from the upper surface of the iron plate where the hole is formed or vice versa (moving the iron plate to the nozzle position).

- Power: 6.0 KW

- Pulse: 5,000 Hz

- Time: A method of forming a hole in a fastening means to which a screw including a bolt is fastened, wherein the fastening time is 100 ms.

In the above, when the distance between the laser injection nozzle position and the upper surface of the iron plate is less than 18 mm (i.e., the distance is greater), the laser irradiation intensity gradually decreases, resulting in a low efficiency of 8% or more in terms of working time, etc.

Meanwhile, when the distance exceeds 18 mm (when the separation distance is closer), the laser irradiation intensity increases and the holes become swollen, resulting in a 20% increase in assembly/bonding strength, etc.

The results for the above moving distance had additional effects depending on power, pulse, and time, and when the above factors (power, pulse, and time) were below the set value, the effect was even greater, resulting in a low efficiency of 8%->15%.

In addition, the results for the above moving distance had additional effects depending on power, pulse, and time, and when the set values of the above factors (power, pulse, and time) were exceeded, the effect was further increased, resulting in a low efficiency of 20%->28%.

Based on the above efficiency results, it can be seen that the critical meaning of the above numbers is clearly explained.

As described above, the present invention relates to a processing method for forming a hole in a fastening means including a bracket to which a screw including a bolt is fastened, by processing a hole including a slot hole corresponding to the shape or form of a body of the fastening means so that the body of the fastening means (screw) can be easily inserted into the fastening means and assembled or fastened, thereby improving the assembling efficiency or the defect rate.

The above description is merely an illustrative description of the technical idea of the present invention, and those skilled in the art will appreciate that various modifications and variations may be made without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to explain it, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

100 : Laser device
200 : Iron plate

Claims (3)

A method for forming a hole in a fastening means so that a connecting means such as a screw including a bolt is fastened to a fastening means including a bracket,
A step in which at least one of the screw body shape and thickness information is input to the control unit based on a user command input unit;
In the case of the above body shape information being a circular type, a slot hole or a long hole will be controlled to be formed in the iron plate corresponding to the bracket, and the step of the iron plate being positioned under the irradiation section of the laser device;
A step in which the thickness of the steel plate is confirmed based on sensor information of the sensor unit or user command input unit information;
A step in which a steel plate or laser irradiation device is moved under the control of a control unit based on information preset and stored in a memory unit according to the confirmed steel plate thickness;
A step in which a laser is irradiated based on cutting processing information that is stored or input in advance based on thickness information of the steel plate; and
A step of forming a slot hole or a hole in a steel plate through the above laser irradiation;
1. When the thickness of the steel plate is 6T (6mm) or less,
- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 4-6 mm from the upper surface of the iron plate where the hole is formed.
- Power: 4.6-5.0 KW is authorized.
- Pulse: 4,800-5,200 Hz is applied.
- Time: Performed in 48-52 ms,

2. When the thickness of the steel plate is more than 6T (6mm) but less than 16T (16mm),
1) Primary processing
- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 7 mm from the upper surface of the iron plate where the hole is formed.
- Power: 6.0 KW
- Pulse: 3,000 Hz
- Time: Performed in 1,500 ms,
2) Secondary processing
- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 3 mm from the upper surface of the iron plate where the hole is formed.
- Power: 5.4 KW
- Pulse: 5,000 Hz
- Time: Performed in 400 ms,
3. If the thickness of the steel plate exceeds 16T (16mm),
1) Primary processing
- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 7 mm from the upper surface of the iron plate where the hole is formed.
- Power: 6.0 KW
- Pulse: 3,000 Hz
- Time: 2,000 ms
2) Secondary processing
- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 13 mm from the upper surface of the iron plate where the hole is formed.
- Power: 5.4 KW
- Pulse: 5,000 Hz
- Time: 1,500 ms
3) 3rd processing
- Focusing position: Focusing for laser injection is performed by moving the laser injection nozzle position 18 mm from the upper surface of the iron plate where the hole is formed.
- Power: 6.0 KW
- Pulse: 5,000 Hz
- Time: A method of forming a hole in a fastening means to which a screw including a bolt is fastened, the fastening time being 100 ms. delete delete