Cutting method of metal plate

Abstract

The invention discloses a method for cutting a metal plate, which comprises the following steps of: cutting a first surface of the metal plate by using a first circular saw blade to form a pre-cutting groove; and a second circular saw blade is used for cutting the second surface of the metal plate at the position corresponding to the pre-cutting groove so as to cut off the metal plate. The first surface is opposite to the second surface. Therefore, the cutting efficiency can be improved, and the possibility of deformation of the cutter due to blockage can be reduced.

Description

Technical Field

[0001] This invention relates to a method for cutting metal sheets, and more particularly to a method for cutting thick metal sheets. Background Technology

[0002] Hot cutting and cold cutting are two commonly used cutting methods in the processing of metal sheets (such as steel plates). Since cold cutting does not generate a heat-affected zone during the cutting process, it can avoid changes in material properties and produce a high-quality cut without deformation. Therefore, cold cutting is usually chosen for precision cutting that requires maintaining the original properties of the material. Common cold cutting methods include waterjet cutting, shearing, sawing, or abrasive cutting.

[0003] In sawing, the main process involves controlling the lateral displacement of the circular saw blade to cut metal sheets. A circular saw blade is a deep-cutting tool, so generally, the thicker the sheet metal, the larger the radius of the circular saw blade needs to be. However, the larger the circular saw blade, the greater the resistance it encounters from the metal sheet during feeding, resulting in a slow feed speed and low cutting efficiency. Furthermore, the circular saw blade is prone to jamming and deformation. Summary of the Invention

[0004] To overcome the problems caused by using large circular saw blades to cut thick metal sheets in the prior art, the purpose of this invention is to provide a method for cutting metal sheets that can not only improve cutting efficiency but also reduce the possibility of the tool deforming due to obstruction.

[0005] The present invention provides a method for cutting a metal sheet according to one embodiment, comprising the following steps: (A) using a first circular saw blade to cut on a first surface of the metal sheet to form a pre-cut groove; and (B) using a second circular saw blade to cut on a second surface of the metal sheet at a position corresponding to the pre-cut groove to cut the metal sheet. The first surface is relative to the second surface.

[0006] Alternatively, in step (A), the cut metal sheet includes left and right halves located on opposite sides of the pre-cut groove, and a retaining portion corresponding to the pre-cut groove and connecting the left and right halves.

[0007] Alternatively, the depth of the pre-cut groove along the normal line of the metal sheet is greater than half the thickness of the metal sheet but less than the thickness of the metal sheet.

[0008] Alternatively, the depth of the pre-cut groove in the line of the method is less than or equal to two-thirds of the thickness of the metal sheet.

[0009] Alternatively, at least one of the first circular saw blade and the second circular saw blade may have a diameter smaller than the thickness of the metal sheet.

[0010] Alternatively, at least one of the first circular saw blade and the second circular saw blade may have a diameter greater than half the thickness of the metal sheet.

[0011] Alternatively, the diameter of the first circular saw blade is the same as the diameter of the second circular saw blade.

[0012] Alternatively, the diameter of the first circular saw blade may be different from the diameter of the second circular saw blade.

[0013] This invention involves cutting thick metal sheets in two stages, with each stage requiring only a portion of the sheet to be cut. Therefore, a small circular saw blade can be used to complete the cutting of thick metal sheets. This reduces the resistance encountered by the circular saw blade, thereby increasing the feed rate and improving cutting efficiency. Furthermore, it avoids deformation of the circular saw blade due to excessive resistance. Attached Figure Description

[0014] Other aspects and advantages of the invention will become apparent after studying the detailed description in conjunction with the following accompanying drawings:

[0015] Figure 1 This is a schematic flowchart of a metal sheet cutting method according to an embodiment of the present invention;

[0016] Wherein, 1: metal sheet; 11: first surface; 12: pre-cut groove; 13: second surface; 14: left half; 15: right half; 16: holding part; 2: first circular saw blade; 3: second circular saw blade; H: depth; N: normal; T1: thickness; diameter; diameter. Detailed Implementation

[0017] Please refer to Figure 1 As shown, the cutting method provided by the present invention according to one embodiment is suitable for cutting a relatively thick metal sheet 1, for example, but not limited to, a thickness of 120 mm, wherein the thickness of the metal sheet 1 is between 15 mm and 500 mm. The metal sheet 1 can be a steel plate or a metal sheet of other materials.

[0018] First, the first circular saw blade 2 is used to cut the first surface 11 of the metal sheet 1 to form a pre-cut groove 12. That is, the first circular saw blade 2 is used to cut the metal sheet 1 by lateral displacement above the metal sheet 1.

[0019] Then, using the second circular saw blade 3, the metal sheet 1 is cut on the second surface 13 at the position corresponding to the pre-cut groove 12 to cut the metal sheet 1. The first surface 11 is relative to the second surface 13. That is, the metal sheet 1 is cut below the metal sheet 1 by means of lateral displacement using the second circular saw blade 3. Alternatively, after the metal sheet 1 is cut using the first circular saw blade 2, the metal sheet 1 includes a left half 14 and a right half 15 located on opposite sides of the pre-cut groove 12, and a holding part 16 connecting the left half 14 and the right half 15 at the position corresponding to the pre-cut groove 12.

[0020] Alternatively, the depth H of the pre-cut groove 12 on the normal N of the metal sheet 1 is greater than half the thickness T1 of the metal sheet 1 but less than the thickness T1 of the metal sheet 1.

[0021] Alternatively, the depth H of the pre-cut groove 12 on the normal N is less than or equal to two-thirds of the thickness T1 of the metal sheet 1.

[0022] Optionally, the diameter of the first circular saw blade 2 Less than the thickness T1 of the metal sheet 1. Or, the diameter of the second circular saw blade 3. Less than the thickness T1 of the metal sheet 1. Alternatively, the diameter of the first circular saw blade 2. and the diameter of the second circular saw blade 3 The thickness T1 is less than that of the metal plate 1.

[0023] Optionally, the diameter of the first circular saw blade 2 It is greater than half the thickness T1 of the metal sheet 1. Alternatively, it is the diameter of the second circular saw blade 3. It is greater than half the thickness T1 of the metal sheet 1. Alternatively, it is the diameter of the first circular saw blade 2. and the diameter of the second circular saw blade 3 It is greater than half the thickness T1 of the metal plate 1.

[0024] Optionally, the diameter of the first circular saw blade 2 Same as the diameter of the second circular saw blade 3

[0025] Optionally, the diameter of the first circular saw blade 2 The diameter of the second circular saw blade 3 is different.

[0026] In summary, this invention cuts thick metal sheets in two stages, with each cut requiring only a portion of the sheet. Therefore, a smaller circular saw blade can be used to cut the thick metal sheet. This reduces the resistance encountered by the circular saw blade, thereby increasing the feed rate and improving cutting efficiency. Furthermore, it avoids deformation of the circular saw blade due to excessive resistance.

Claims

1. A method for cutting metal sheets, characterized in that, Includes the following steps: A. Using the first circular saw blade, cut on the first surface of the metal sheet to form a pre-cut groove; as well as B. Using the second circular saw blade, cut the metal sheet at the position corresponding to the pre-cut groove on the second surface of the metal sheet to cut the metal sheet; The first surface is relative to the second surface.

2. The method for cutting metal sheets according to claim 1, characterized in that, In step (A), the cut metal sheet includes left and right halves located on opposite sides of the pre-cut groove, and a retaining part corresponding to the pre-cut groove and connecting the left and right halves.

3. The method for cutting metal sheets according to claim 1, characterized in that, The depth of the pre-cut groove along the normal line of the metal sheet is greater than half the thickness of the metal sheet but less than the thickness of the metal sheet.

4. The method for cutting metal sheets according to claim 3, characterized in that, The depth of the pre-cut groove on the line is less than or equal to two-thirds of the thickness of the metal sheet.

5. The method for cutting metal sheets according to claim 1, characterized in that, The diameter of at least one of the first circular saw blade and the second circular saw blade is smaller than the thickness of the metal sheet.

6. The method for cutting metal sheets according to claim 1, characterized in that, The diameter of at least one of the first circular saw blade and the second circular saw blade is greater than half the thickness of the metal sheet.

7. The method for cutting metal sheets according to claim 1, characterized in that, The diameter of the first circular saw blade is the same as the diameter of the second circular saw blade.

8. The method for cutting metal sheets according to claim 1, characterized in that, The diameter of the first circular saw blade is different from the diameter of the second circular saw blade.

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