A cutting tool for processing stainless steel products

Abstract

The present invention relates to a tool having a long service life. The present invention discloses a tool for processing stainless steel products, comprising a tool bar, a plurality of tool pits are arranged in a concentric array at the end of the tool bar, a square blade is arranged in each tool pit, a concave arc-shaped cutting edge is provided on each side of the blade, the blade is detachably connected to the tool pit, and the blade is made of a cemented carbide material. With the cooperation of the blade and the tool pit, the blade can be quickly replaced without replacing the entire tool.

Description

Technical Field

[0001] The present invention relates to a cutting tool, and more particularly to a cutting tool for processing stainless steel products. Background Art

[0002] The use of metal middle frames and shells on mobile phones not only has a beautiful appearance, but also has the advantages of delicate feel, wear resistance, drop resistance, and corrosion resistance, so it is very popular among consumers. Among them, the back cover, as an important part of the mobile phone, has a smooth surface and a complex internal structure. At present, the general method of making the back cover of mobile phones is: die casting (or forging)--CNC--appearance processing-back cover; die casting has the advantages of high efficiency, good molding, the ability to manufacture complex structural parts, and low cost.

[0003] In the existing technology, it is essential to use cutting tools for processing mobile phone cases, especially stainless steel mobile phone frames, which require milling with cutting tools with smaller diameters. Traditional processing uses solid carbide cutting tools. Since the outer diameter of the profile is between 15-35mm, there are several problems. If a blade breaks, the processed parts will have line marks, and the entire knife will be scrapped; only the blade is involved in cutting, and the handle is only for support. The use of cemented carbide as a whole wastes costs; the life of the entire knife is short. There is a problem of short service life. Summary of the invention

[0004] In view of the shortcomings of the prior art, an object of the present invention is to provide a cutting tool for processing stainless steel products, which has the effect of long service life.

[0005] To achieve the above technical objectives, the present invention provides the following technical solutions: a tool for processing stainless steel products, comprising a tool rod, a plurality of tool pits are arranged in a concentric array at the end of the tool rod, a square blade is arranged in each tool pit, a concave arc-shaped cutting edge is provided on each side of the blade, the blade is detachably connected to the tool pit, and the blade is made of cemented carbide material.

[0006] By adopting the above technical solution, the blade and the knife pit can be detachably connected, and the knife rod does not need to be made of carbide material, which saves production costs. The four sides of the blade are respectively provided with cutting edges. After the blade is installed in the knife pit, only the cutting edge on the outer side works. When the cutting edge is broken, the blade is removed and rotated to expose the cutting edge on the other side. The tool can be used normally without replacing the entire tool, which prolongs the service life of the tool.

[0007] Preferably, each cutting edge located on one side of the upper surface of the blade includes a working section and a chip removal section, the working section is located at the edge of the blade and parallel to the upper surface of the blade, the chip removal section is arranged in a semicircular ring shape and surrounds the working section, and the radial cross-section of the chip removal section is a pit.

[0008] By adopting the above technical solution, when the cutting edge mills the outer surface of the stainless steel mobile phone case, the generated debris will splash outward, and sometimes long strips of debris may be generated. The debris can be temporarily accumulated in the chip removal section. When the debris breaks, the entire debris will fall off directly, avoiding the debris from affecting the normal milling of the cutting edge, resulting in an uneven product surface, thereby improving the chip removal efficiency.

[0009] Preferably, the blade and the blade pit are detachably connected by screws, a through hole is provided in the middle of the blade for the screw to pass through, a threaded groove is provided on the blade pit for the screw to be screwed in, and the threaded groove on the blade pit is perpendicular to the bottom surface of the blade pit.

[0010] By adopting the above technical solution, when the cutting edge needs to be replaced, the blade can be removed by unscrewing the screw, and after rotating the blade, the screw can be screwed back. At the same time, the screw is ensured to be perpendicular to the blade, and the screw is only subjected to vertical thrust, which ensures that the blade is not skewed and improves the structural stability.

[0011] Preferably, the four end angles of the blade are 90°, the blade pit is arranged to be square, the two sides of the blade pit close to the edge of the blade rod are arranged to be openings, the corners of the blade pit are also 90°, and the through hole of the blade is located at the center of the blade.

[0012] By adopting the above technical solution, the four end angles of the blade are all right angles. After the blade is rotated, it can be tightly stuck in the blade pit, thereby improving the rationality of the structure.

[0013] Preferably, protrusions that engage with the cutting edge are provided on the two side walls of the knife pit, and the longest part of the protrusions is the same as the length of the cutting edge of the cutting edge.

[0014] By adopting the above technical solution, the position of the blade is further limited to ensure that the angle of the blade is constant.

[0015] Preferably, the outer side wall of the blade forms an angle of 11° with the vertical line, and the peripheral edge of the upper surface of the blade is chamfered at 4°.

[0016] By adopting the above technical solution, after the blade is inserted into the knife pit, the two side walls of the blade will be close to the inner wall of the knife pit. The 4° chamfer on the upper surface of the blade allows the knife pit to be slightly deformed after being squeezed by the blade, so that the blade and the knife pit have an interference fit, thereby improving the stability of the connection.

[0017] Preferably, the blade bodies on both sides of each cutting edge are of unequal width, and the blade body at the front end of the blade pit is narrower than the blade body at the rear end.

[0018] By adopting the above technical solution, the blade body at the front end of the cutting edge may contact the workpiece, so that the front blade body is lower than the rear blade body. When the tool is rotated, the blade will not hit the workpiece, thereby improving the rationality of the structure.

[0019] Preferably, the thickness of the blade is 3 mm.

[0020] By adopting the above technical solution, if the thickness of the blade is too thin, the blade will lack rigidity and be easy to deform; if the thickness of the blade is too thick, it will easily drill through the knife pit. After testing, the optimal blade thickness is 3mm.

[0021] In summary, the present invention has achieved the following effects:

[0022] 1. With the help of the cooperation between the blade and the cutter pit, the blade can be quickly replaced without replacing the entire tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram for showing the overall structure in this embodiment;

[0024] Figure 2 This is a schematic diagram for showing the specific structure of the knife bar in this embodiment;

[0025] Figure 3 This is a schematic diagram for showing the specific structure of the blade in this embodiment;

[0026] Figure 4 It is a cross-sectional view used to show the specific structure of the blade in this embodiment.

[0027] In the figure, 1, tool rod; 2, tool pit; 21, protrusion; 3, blade; 4, cutting edge; 41, working section; 42, chip removal section; 5, screw. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0029] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0030] Embodiment: A tool for processing stainless steel products, such as Figure 1 As shown, it includes a tool bar 1, and the end of the tool bar 1 has a plurality of tool pits 2 in a concentric array (reference Figure 2). A square blade 3 is arranged in each knife pit 2, and a concave arc-shaped cutting edge 4 is provided on each side of the blade 3. The blade 3 is detachably connected to the knife pit 2, and the blade 3 is made of cemented carbide material. The blade 3 and the knife pit 2 are detachably connected, and the tool rod 1 does not need to be made of cemented carbide material, which saves production costs. Cutting edges 4 are provided on the four sides of the blade 3. After the blade 3 is installed in the knife pit 2, only the cutting edge 4 on the outer side works. When the cutting edge 4 is broken, the blade 3 is removed and rotated to expose the cutting edge 4 on the other side. The tool can be used normally without replacing the entire tool.

[0031] like Figure 1 and Figure 2 As shown, the blade 3 and the knife pit 2 are detachably connected by a screw 5. A through hole is provided in the middle of the blade 3 for the screw 5 to fit through. A threaded groove is provided on the knife pit 2 for the screw 5 to be screwed in. The threaded groove on the knife pit 2 is perpendicular to the bottom surface of the knife pit 2. When the cutting edge 4 needs to be replaced, the screw 5 is unscrewed to remove the blade 3. After rotating the blade 3, the screw 5 can be screwed back. At the same time, the screw 5 is ensured to be perpendicular to the blade 3. The screw 5 is only subjected to vertical thrust, which ensures that the blade 3 is not skewed.

[0032] like Figure 3 and Figure 4 As shown, each cutting edge 4 includes a working section 41 and a chip removal section 42 on one side of the upper surface of the blade 3. The working section 41 is located at the edge of the blade 3 and is parallel to the upper surface of the blade 3. The chip removal section 42 is set in a semicircular ring shape and surrounds the working section 41. The radial cross section of the chip removal section 42 is a pit. When the cutting edge 4 mills the outer surface of the stainless steel mobile phone case, the generated debris will splash outward, and sometimes long strips of debris may be generated. The debris can be temporarily accumulated in the chip removal section 42. When the debris breaks, the entire debris will fall off directly, avoiding the debris from affecting the normal milling of the cutting edge 4, resulting in an uneven product surface.

[0033] like Figure 2 and Figure 3 As shown, the four end angles of the blade 3 are 90°, the blade pit 2 is set to be square, the two sides of the blade pit 2 close to the edge of the blade rod 1 are set to be open, the corners of the blade pit 2 are also 90°, and the through hole of the blade 3 is located at the center of the blade 3. The four end angles of the blade 3 are all right angles, and after the blade 3 is rotated, it can also be tightly stuck in the blade pit 2.

[0034] like Figure 2 As shown, protrusions 21 for engaging the cutting edge 4 are provided on the two side walls of the knife pit 2. The longest part of the protrusion 21 is the same as the length of the cutting edge of the cutting edge 4, which further limits the position of the blade 3 and ensures that the angle of the blade 3 is constant.

[0035] like Figure 4As shown, the outer wall of the blade 3 forms an angle of 11° with the vertical line, and the upper surface of the blade 3 has a 4° chamfer. After the blade 3 is inserted into the knife pit 2, the two side walls of the blade 3 will be close to the inner wall of the knife pit 2, and the 4° chamfer on the upper surface of the blade 3 allows the knife pit 2 to be slightly deformed after being squeezed by the blade 3, so that the blade 3 and the knife pit 2 have an interference fit.

[0036] like Figure 1 and Figure 3 As shown, the blade 3 bodies on both sides of each cutting edge 4 are not of equal width, the blade 3 body at the front end of the tool pit 2 is narrower than the blade 3 body at the rear end, and the blade 3 body at the front end of the cutting edge 4 is likely to contact the workpiece, making the front end of the blade 3 body lower than the rear end. When the tool is rotated, the blade 3 will not hit the workpiece, thereby improving the rationality of the structure.

[0037] The thickness of the blade 3 is 3 mm. If the thickness of the blade 3 is too thin, the blade 3 will be insufficiently rigid and easily deformed; if the thickness of the blade 3 is too thick, it will easily drill through the knife pit 2. After testing, the thickness of the blade 3 is 3 mm, which is the best size.

Claims

1. A cutting tool for processing stainless steel products, characterized in that: The invention comprises a knife bar (1), wherein the end of the knife bar (1) is provided with a plurality of knife pits (2) in a concentric array, each of the knife pits (2) is provided with a square blade (3), each side of the blade (3) is provided with a concave arc-shaped cutting edge (4), the blade (3) is detachably connected to the knife pit (2), and the blade (3) is made of a cemented carbide material; Each cutting edge (4) located on a side of the upper surface of the blade (3) comprises a working section (41) and a chip removal section (42), wherein the working section (41) is located at the edge of the blade (3) and is parallel to the upper surface of the blade (3), and the chip removal section (42) is arranged in a semicircular ring shape and surrounds the working section (41), and the radial cross section of the chip removal section (42) is a pit; The blade (3) and the blade pit (2) are detachably connected by means of a screw (5); a through hole for the screw (5) to pass through is provided in the middle of the blade (3); a thread groove for the screw (5) to be screwed into is provided on the blade pit (2); and the thread groove on the blade pit (2) is perpendicular to the bottom surface of the blade pit (2); The four end angles of the blade (3) are 90°, the blade pit (2) is arranged in a square shape, the two sides of the blade pit (2) close to the edge of the blade rod (1) are arranged as openings, the corners of the blade pit (2) are also 90°, and the through hole of the blade (3) is located at the center of the blade (3); The two side walls of the knife pit (2) are provided with protrusions (21) for engaging with the cutting edge (4), and the longest part of the protrusion (21) is the same as the cutting edge length of the cutting edge (4); The outer wall of the blade (3) forms an angle of 11° with the vertical line, and the upper surface of the blade (3) has a 4° chamfer; the blade (3) bodies on both sides of each cutting edge (4) are of different widths, and the blade (3) body at the front end of the blade pit (2) is narrower than the blade (3) body at the rear end; The thickness of the blade (3) is 3 mm.

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