TWI902486B - High precision laser cutting machine - Google Patents

Abstract

A high precision laser cutting machine includes a metal base, a granite bed, and a laser light source. The granite bed is located on the metal base. The granite bed includes at least one first granite block and at least one second granite block. The second granite block is stacked on the first granite block. The first granite block is disposed along the lengthwise direction of the metal base, and the second granite block is disposed along the widthwise direction of the metal base. The laser light source is movably located above the granite bed.

Description

High-precision laser cutting machine

This disclosure relates to a high-precision laser cutting machine.

Rapid technological advancements have driven industrial development, leading to the emergence of numerous different processing technologies. Among them, the highly efficient and relatively safe laser cutting technology, capable of cutting extremely fine and small objects, has become a crucial component of processing technology. Generally, laser cutting technology works by focusing laser light onto the workpiece to create localized thermal melting damage, resulting in continuous cuts on the workpiece after laser cutting.

However, the traditional laser cutting machine's table lacks special design in terms of material selection and structural design, which can lead to a decrease in the overall precision of the laser cutting machine due to thermal expansion and contraction and resonance. This is detrimental to the product competitiveness and workpiece yield of the laser cutting machine.

One of the technical features disclosed herein is a high-precision laser cutting machine.

According to some embodiments disclosed herein, a high-precision laser cutting machine includes a metal base, a granite bed, and a laser light source. The granite bed is located on the metal base. The granite bed includes at least one first granite block and at least one second granite block. The second granite block is stacked on top of the first granite block. The first granite block is arranged along the length direction of the metal base, and the second granite block is arranged along the width direction of the metal base. The laser light source is positioned above the granite bed.

In some embodiments, the granite bed includes two first granite blocks and two second granite blocks, with the two first granite blocks located on the two long sides of the metal base and the two second granite blocks located on the two short sides of the metal base.

In some embodiments, each of the two second granite blocks is located at one end on the same side of the two first granite blocks.

In some embodiments, the two first granite blocks are opposite each other, and the two second granite blocks are opposite each other.

In some implementations, the Shaw hardness of the granite bed is in the range of 92 to 94 degrees.

In some embodiments, the compressive strength of the granite bed ranges from 2652 kgf/ ^cm² to 2704 kgf/ ^cm² .

In some embodiments, the flexural strength of the granite bed ranges from 363.4 kgf/ ^cm² to 378.3 kgf/ ^cm² .

In some embodiments, the water absorption rate of the granite bed is in the range of 0.02% to 0.04%, and the bulk density of the granite bed is in the range of 3.11 to 3.16.

In some embodiments, the aforementioned high-precision laser cutting machine further includes a plurality of shock-absorbing plates. The shock-absorbing plates are located between the metal base and the granite bed, and the material of the shock-absorbing plates is non-metallic.

In some embodiments, the aforementioned laser source is a fiber laser source.

In the above-disclosed embodiment, since the granite bed of the aforementioned high-precision laser cutting machine includes stacked first granite blocks and second granite blocks, with the first granite block arranged along the length of the metal base and the second granite block arranged along the width of the metal base, the thermal expansion and contraction caused by temperature and resonance during the laser cutting process can be effectively suppressed based on the material properties of granite and the above-mentioned structural configuration, thereby improving the precision of the laser cutting machine. This design is beneficial to the product competitiveness of the laser cutting machine and the yield of its produced workpieces.

The embodiments disclosed below provide numerous different embodiments, or examples, for implementing the various features of the provided object. Specific examples of elements and arrangements are described below to simplify the subject matter. Of course, these examples are merely illustrative and are not intended to be limiting. Furthermore, element symbols and/or letters may be repeated in various embodiments. This repetition is for simplicity and clarity and does not in itself specify the relationship between the various embodiments and/or configurations discussed.

Spatial relative terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for descriptive purposes to describe the relationship between one element or feature and another, as shown in the accompanying figures. Spatial relative terms are intended to cover different orientations of the device in use or operation other than those shown in the accompanying figures. The device may be oriented in other ways (rotated 90 degrees or otherwise), and the spatial relative descriptors used herein will be interpreted accordingly.

Figure 1 shows a perspective view of a high-precision laser cutting machine 100 according to an embodiment of this disclosure. Figure 2 shows a perspective view of the granite bed 120 and metal base 110 of Figure 1. Referring to both Figure 1 and Figure 2, the high-precision laser cutting machine 100 includes a metal base 110, a granite bed 120, and a laser light source 130. The granite bed 120 is located on the metal base 110. The long side and the short side of the metal base 110 may both be greater than 2 meters, but this is not intended to limit the scope of this disclosure. The granite bed 120 includes at least one first granite block 122 and at least one second granite block 124. The second granite block 124 is stacked on top of the first granite block 122. In other words, the lower layer of the granite bed 120 is the first granite block 122, and the upper layer of the granite bed 120 is the second granite block 124. Furthermore, the first granite block 122 is arranged along the length direction D1 of the metal base 110, and the second granite block 124 is arranged along the width direction D2 of the metal base 110. In this embodiment, the granite bed 120 includes two first granite blocks 122 and two second granite blocks 124. In other embodiments, the granite bed 120 may include other quantities of stacked granite blocks, and the granite blocks may be further positioned in other locations, depending on design requirements.

Due to the material properties of granite, the granite table 120 of the high-precision laser cutting machine 100 has the following characteristics: 1. Long-term natural aging eliminates internal stress; 2. Stable material, not easily deformed; 3. Resistant to acids and alkalis, and anti-magnetization; 4. Will not rust due to moisture; 5. Will not expand or contract due to temperature, ensuring stable processing accuracy.

The laser light source 130 is movable above the granite bed 120. For example, the laser light source 130 can be driven by the drive assembly 140, allowing it to move along two axes: length direction D1 and width direction D2. When the high-precision laser cutting machine 100 is running, the workpiece (e.g., a galvanized sheet or stainless steel sheet) can be placed on the granite bed 120 and moved above it by the laser light source 130 for laser cutting. The laser cutting process described above may generate temperature variations and vibrations.

Specifically, since the granite table 120 of the high-precision laser cutting machine 100 includes stacked first granite blocks 122 and second granite blocks 124, with the first granite block 122 arranged along the length direction D1 of the metal base 110 and the second granite block 124 arranged along the width direction D2 of the metal base 110, the thermal expansion and contraction caused by temperature and resonance during the laser cutting process can be effectively suppressed based on the material properties of granite and the above-mentioned structural configuration, thereby improving the accuracy of the high-precision laser cutting machine 100 (e.g., less than ±0.1 mm). This design enhances the product competitiveness of the high-precision laser cutting machine 100 and the yield of its produced workpieces.

In some embodiments, the Shore hardness of the granite bed 120 can be in the range of 92 to 94 degrees. The compressive strength of the granite bed 120 can be in the range of 2652 kgf/cm² to 2704 kgf/cm². The flexural strength of the granite bed 120 can be in the range of 363.4 kgf/cm² to 378.3 kgf/cm². The water absorption rate of the granite bed 120 can be in the range of 0.02% to 0.04%, and the bulk density of the granite bed 120 can be in the range of 3.11 to 3.16. By selecting the above-mentioned granite material and stacking multiple granite blocks (such as the first granite block 122 and the second granite block 124), the thermal expansion and contraction and vibration of the table of the high-precision laser cutting machine 100 can be effectively suppressed.

Furthermore, the drive assembly 140 may include a slide rail 141 spanning the two second granite blocks 124, a slide rail 142 located on the second granite blocks 124, and a slider that can be coupled to the slide rails 141 and 142. The laser light source 130 is driven by the drive assembly 140 at a speed ranging from 30 m/min to 300 m/min. In some embodiments, the laser light source 130 may be a fiber laser light source with a power ranging from 500W to 30KW.

In this embodiment, the metal base 110 has an opening O for waste to fall into the tray 102 for collection and easy cleaning. In addition, the high-precision laser cutter 100 may also have a ramp 101 to ensure that the waste can slide smoothly into the opening O.

Figure 3 shows an exploded view of the granite bed 120 and metal base 110 in Figure 2. Referring also to Figures 1 and 3, in this embodiment, two first granite blocks 122 are located on the two long sides of the metal base 110, and two second granite blocks 124 are located on the two short sides of the metal base 110. The two first granite blocks 122 are arranged opposite each other and parallel to each other, and the two second granite blocks 124 are arranged opposite each other and parallel to each other. The length of the first granite block 122 is greater than the length of the second granite block 124. The two ends of the second granite block 124 are located on the two same-side ends of the first granite block 122, forming a double-layered stacked structure. The top surface of the second granite block 124 can accommodate the laser light source 130 and the drive assembly 140.

Furthermore, the high-precision laser cutting machine 100 may also include a plurality of shock-absorbing plates 150. The shock-absorbing plates 150 are located between the metal base 110 and the granite bed 120. For example, the shock-absorbing plates 150 are sandwiched between the metal base 110 and the first granite block 122 beneath the granite bed 120. The shock-absorbing plates 150 can serve as a buffer between the metal base 110 and the granite bed 120 to further reduce vibration during operation of the high-precision laser cutting machine 100 and improve cutting accuracy. In this embodiment, the shock-absorbing plates 150 are located in six areas of the metal base 110, including four corner areas and two areas at the center on both sides; this configuration effectively suppresses vibration. In some embodiments, the material of the shock absorber 150 is non-metallic, and may include plastic, rubber, or a combination of the above materials. For example, the material of the shock absorber 150 is chloroprene rubber, and its operating temperature range is -10°C to 70°C. Furthermore, the selection of the shock absorber 150 conforms to the following mathematical formula: Equipment load (N) / Shock absorber surface pressure (N/ ^mm² ) / 100 = Necessary area of the shock absorber ( ^cm² ). When the shock absorber 150 is applied to a high-precision laser cutting machine 100, the shock absorber surface pressure is 0.25 N/ ^mm² , and the compression degree is approximately 2.2 mm. In this embodiment, the shock absorber 150 can be made of rubber with a hardness of 40 (JIS standard). When the standard size is 240mm x 480mm x 0.12mm (12 strips), it can support surface pressure in the range of 0.1N/ ^mm² to 0.4N/ ^mm² , and the permissible surface pressure is 0.5N/ ^mm² .

In summary, since the granite bed of the aforementioned high-precision laser cutting machine includes stacked first and second granite blocks, with the first granite block arranged along the length of the metal base and the second granite block arranged along the width of the metal base, the material properties of granite and the above-mentioned structural configuration can effectively suppress thermal expansion and contraction caused by temperature and resonance during the laser cutting process, thereby improving the precision of the laser cutting machine. This design enhances the product competitiveness of the laser cutting machine and the yield of its produced workpieces.

The foregoing outlines the characteristics of several embodiments, enabling those skilled in the art to better understand the nature of this disclosure. Those skilled in the art should understand that they can readily use this disclosure as a basis for designing or modifying other processes and structures to achieve the same purpose and/or the same advantages as the embodiments described herein. Those skilled in the art should also recognize that such equivalent constructions do not depart from the spirit and scope of this disclosure, and that various changes, substitutions, and alterations can be made to them without departing from the spirit and scope of this disclosure.

100: High-precision laser cutting machine 101: Inclined plate 102: Support plate 110: Metal base 120: Granite bed 122: First granite block 124: Second granite block 130: Laser light source 140: Drive assembly 141: Slide rail 142: Slide rail 150: Vibration damping plate D1: Length direction D2: Width direction O: Opening

The nature of this disclosure is best understood when read in conjunction with the accompanying figures, and is supported by the embodiments described below. Note that, according to standard industry practice, the features are not drawn to scale. In fact, the dimensions of the features may be increased or decreased as needed for clarity of explanation. Figure 1 shows a perspective view of a high-precision laser cutting machine according to one embodiment of this disclosure. Figure 2 shows a perspective view of the granite bed and metal base of Figure 1. Figure 3 shows an exploded view of the granite bed and metal base of Figure 2.

Domestic Storage Information (Please record in order of storage institution, date, and number) None International Storage Information (Please record in order of storage country, institution, date, and number) None

110: Metal base

120: Granite bed platform

122: First granite block

124: Second granite block

150: Shock-absorbing pad

D1: Length direction

D2: Width direction

O: Open mouth

Claims (10)

A high-precision laser cutting machine includes: a metal base; a granite bed located on the metal base, wherein the granite bed includes two first granite blocks and two second granite blocks, the two second granite blocks being stacked on the two first granite blocks, the two first granite blocks being arranged along a length direction of the metal base, and the two second granite blocks being arranged along a width direction of the metal base; a driving component located on the two second granite blocks, and including a slide rail spanning across the two second granite blocks and another slide rail on each of the two second granite blocks, the slide rail extending along the length direction, and the other slide rail extending along the width direction; and A laser light source is connected to a slide rail spanning the two second granite blocks and moved to a position above the granite bed. The drive assembly is configured to move the laser light source along two axes in the length and width directions. The high-precision laser cutting machine as described in claim 1, wherein the two first granite blocks are respectively located on the two long sides of the metal base, and the two second granite blocks are respectively located on the two short sides of the metal base. The high-precision laser cutting machine as described in claim 2, wherein each of the two second granite blocks has its two ends located on the same side of the two first granite blocks. The high-precision laser cutting machine as described in claim 2, wherein the two first granite blocks are opposite each other, and the two second granite blocks are opposite each other. The high-precision laser cutting machine as described in claim 1, wherein the granite bed has a Shaw hardness in the range of 92 to 94 degrees. The high-precision laser cutting machine as described in claim 1, wherein the compressive strength of the granite bed is in the range of 2652 kgf/ ^cm² to 2704 kgf/ ^cm² . The high-precision laser cutting machine as described in claim 1, wherein the flexural strength of the granite bed is in the range of 363.4 kgf/ ^cm² to 378.3 kgf/ ^cm² . The high-precision laser cutting machine as described in claim 1, wherein the water absorption rate of the granite bed is in the range of 0.02% to 0.04%, and the bulk density of the granite bed is in the range of 3.11 to 3.16. The high-precision laser cutting machine as described in claim 1 further includes: a plurality of shock-absorbing pads located between the metal base and the granite bed, wherein the shock-absorbing pads are made of a non-metallic material. The high-precision laser cutting machine as described in claim 1, wherein the laser source is a fiber laser source.