A kind of restrained screw umbrella soft cutter structure

Abstract

This invention discloses a structure for a flexible bevel cutting tool, comprising a tool body, a carbide insert, a pressure plate, a nut, bolts, and a tool disc. The tool body is fixed to the tool disc by the pressure plate, nut, and bolts. The tool body and the carbide insert are positioned by a positioning semi-cylindrical cylinder and a semi-cylindrical groove, and secured with screws. During installation, the horizontal positioning surface of the tool body mates with the bottom surface of the carbide insert, and the positioning semi-cylindrical cylinder of the tool body mates with the semi-cylindrical groove of the carbide insert, resulting in more accurate positioning and avoiding errors such as misalignment or reverse installation of the carbide insert. The tool is further secured with hexagonal socket head cap screws, enhancing the stability of the insert installation. This invention's flexible bevel cutting tool features an integrated installation for greater convenience. Furthermore, the new flexible bevel cutting tool has a high-speed steel tool body and a carbide insert tip, resulting in high cutting efficiency, and can be directly replaced on the tool disc.

Description

Technical Field

[0001] This invention relates to the field of mechanical manufacturing and processing, specifically to a structure for a soft-cutting tool with a restrained spiral bevel. Background Technology

[0002] Currently, common cutting tools for machining bevel gears are made from a single piece of high-speed steel. Due to the properties of high-speed steel, the machining hardness of these tools is limited to below HB240, and the overall tool speed is typically 45 m / min. During machining, tool wear necessitates removal of the tool head for re-sharpening, requiring re-grinding on a specialized cutting tool grinder, which consumes a significant amount of time. Today, industrial demands for bevel gear performance are increasingly stringent, meaning the requirements for machining bevel gear tools are also constantly rising. Higher cutting speeds are required for efficiency, and the ability to cut materials with even higher hardness is needed. Existing tool structures can no longer meet the current industrial requirements for bevel gear machining efficiency and cutting hardness, necessitating the redesign of superior tool structures to replace existing ones.

[0003] The disadvantages of traditional counter-rotating spiral blades are:

[0004] (1) Traditional restrained spiral cutters are two-part designs, which are cumbersome to install and prone to errors from a lean perspective;

[0005] (2) Traditional high-speed steel cutting tools are made of solid high-speed steel. The linear speed of solid high-speed steel is generally 45m / min, resulting in low cutting efficiency.

[0006] (3) Traditional kerb cutting tools require the removal of the cutter head and re-sharpening after wear, necessitating re-grinding using a dedicated kerb sharpening machine; this increases labor intensity, and is particularly uneconomical for mass production. (Increased time costs, resulting in lower economic efficiency for mass production)

[0007] (4) Traditional high-speed steel cutting tools and cutter head systems have low cutting efficiency, long machine tool occupancy time, and high unit production cost. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a structure for a flexible spiral bevel cutting tool. The new spiral bevel tool is an integral piece that is more convenient to install. Moreover, the new spiral bevel tool has a high-speed steel body and a carbide insert, resulting in high cutting efficiency. It can also be directly replaced on the cutter head.

[0009] The technical solution adopted in this invention is: a structure for a soft cutting tool with a restrained spiral bevel, comprising a tool body, a carbide blade, a pressure plate, a nut, a bolt, and a tool disc;

[0010] The cutter body is fixed to the cutter disc by a pressure plate, nut and bolt; the cutter body and the carbide insert are positioned by a positioning semi-cylinder and a semi-cylinder groove and fixed by screws;

[0011] The blade body is a single-piece structure, no longer the previous split structure; the triangular part with rounded corners at the upper left side of the blade body is the area for mounting carbide cutting tools. A positioning semi-cylinder along the midline of the base of the triangle is designed at the midpoint of the base of the triangle; the bottom of the triangular area for mounting carbide cutting tools is a platform for positioning carbide cutting tools.

[0012] The shape of the carbide insert is similar to the triangle at the top of the cutter body, and its size is equal to or slightly larger than that of the triangle at the top of the cutter body. The midpoint of the base of the triangle on the back of the carbide insert is designed with a semi-cylindrical groove structure that mates with the positioning semi-cylindrical cylinder, forming a parallel constraint with the positioning semi-cylindrical cylinder. The main working surfaces of the carbide insert are the two sides of the left triangle.

[0013] When installing the cutter body and the carbide insert, the horizontal positioning table of the cutter body mates with the bottom surface of the carbide insert, and the positioning semi-cylinder of the cutter body mates with the semi-cylinder groove of the carbide insert. This ensures more accurate positioning and avoids errors such as misalignment or reversal of the carbide insert during installation. The insert is then secured with hexagonal socket screws, resulting in greater stability during installation.

[0014] Preferably, the height of the positioning semi-cylinder is four-fifths of the midline of the base of the triangle.

[0015] Preferably, two threaded holes for fixing carbide inserts are designed at one-quarter and three-quarters of the height of the positioning semi-cylinder, and the hole depth is not through holes; screw holes for fixing carbide inserts are designed at one-quarter and three-quarters of the positioning semi-cylinder groove of the carbide insert, and the screw holes are coaxially matched with the threaded holes on the cutter body, and are fastened with corresponding screws to ensure the positioning accuracy of the carbide insert.

[0016] Preferably, the thickness of the table is slightly less than the thickness of the carbide insert, so that the table thickness will not interfere with the workpiece being cut during the cutting process.

[0017] The beneficial effects of the present invention are: (1) The new tool design adopts an integral type to replace the traditional two-part structure, which improves installation efficiency and accuracy;

[0018] (2) The new tool design adopts a high-speed steel tool body + alloy tool insert to replace the original solid high-speed steel tool, and the cutting line speed is increased from the original 45m / min to more than 120m / min, which is more than twice the original speed.

[0019] (3) Traditional sprue cutters need to be re-sharpened after wear, requiring the tool disc to be re-grinded and the tool to be re-grinded using a dedicated sprue sharpener; this increases labor intensity, and is particularly uneconomical when processing large batches.

[0020] (4) Traditional high-speed steel tools are prone to chipping when machining hardness below HB240 and encountering material inclusions, and tool replacement is troublesome; the new structure tools are not prone to chipping when cutting hardness above HB300 and tool replacement is easy.

[0021] (5) Traditional high-speed steel cutting tools and cutter head systems have low cutting efficiency, long machine tool occupancy time, and high unit production costs. Statistics show that the unit cost of new cutting tools is 70% of that of old tools, and the cutting efficiency is 225% of that of traditional tools.

[0022] (6) The new type of cutting tool alloy blade and the tool body are installed and fixed by protruding edge positioning and screw fixing, which is more efficient and more accurate. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the soft cutting tool for resisting spiral bevels in this invention.

[0024] Figure 2 This is a schematic diagram of the combination of the blade body and the alloy blade of the present invention.

[0025] Figure 3 This is a schematic diagram of the blade body of the present invention.

[0026] Figure 4 This is a schematic diagram of the alloy blade of the present invention.

[0027] In the diagram: 1. Tool body, 2. Carbide insert, 3. Pressure plate, 4. Bolt, 5. Nut, 6. Tool disc, 7. Positioning semi-cylinder, 8. Carbide cutting edge, 9. Screw hole, 10. Semi-cylinder groove, 11. Threaded hole, 12. Table. Detailed Implementation

[0028] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0029] Figure 1 The device shown is a tool holder system structure. The entire system structure consists of a tool body 1, a carbide insert 2, a clamping plate 3, bolts 4, nuts 5, and a tool holder 6. The assembly method is as follows: bolts 4 are fixed to the tool holder 6, and the integral structure of the tool body 1 is fitted into the bolts 4 through its fixing holes. The clamping plate 3 is used for tight clamping, with the nuts 5 providing the clamping force. The carbide insert 2 is fastened to the tool body 1 with hex socket head cap screws.

[0030] Figure 2 , 4The cutter body 1 shown is an integral structure. The triangular section with rounded corners on the upper left side of the cutter body is the area for mounting carbide inserts. A positioning semi-cylinder 7, with a height of four-fifths of the triangle's base, is designed at the midpoint of the triangle's base. Two threaded holes 11 for fixing carbide inserts are designed at positions one-quarter and three-quarters of the height of the positioning semi-cylinder; these holes are not through holes. At the bottom of the triangular area for mounting carbide inserts is a carbide insert positioning table 12, the thickness of which is slightly less than the thickness of the carbide insert. This ensures that the table thickness will not interfere with the workpiece during machining.

[0031] Figure 3 Viewed from the right side of the carbide insert, the shape of the carbide insert 2 is similar to the triangle at the top of the tool body, and its size is equal to or slightly larger than the triangle at the top of the tool body. A semi-cylindrical groove 10, which mates with the positioning semi-cylindrical cylinder, is designed along the centerline at the midpoint of the base of the triangle on the back of the carbide insert, forming a parallel constraint with the positioning semi-cylindrical cylinder of the tool body. Screw holes 9 for fixing the carbide insert are designed at one-quarter and three-quarters of the position of the positioning semi-cylindrical groove of the carbide insert. These screw holes coaxially mate with the threaded holes on the tool body and are tightened with corresponding screws, ensuring the positional accuracy of the carbide insert 2. The main working surfaces of the carbide insert are the two sides of the left triangle, namely the carbide side cutting edges 8. During installation, the horizontal positioning tool body table mates with the bottom surface of the carbide insert, and the positioning semi-cylindrical cylinder of the tool body mates with the semi-cylindrical groove of the carbide insert, resulting in more accurate positioning and avoiding errors such as misalignment or reverse installation of the carbide insert. Then, it is tightened with an internal hex screw, making the insert installation more stable.

[0032] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A structure for a soft-cutting tool that counteracts spiral bevels, characterized in that: Includes the cutter body, carbide insert, pressure plate, nut, bolt, and cutter head; The cutter body is fixed to the cutter disc by a pressure plate, nut and bolt; the cutter body and the carbide insert are positioned by a positioning semi-cylinder and a semi-cylinder groove and fixed by screws; The blade body is an integral structure. The triangular part with rounded corners at the top of the blade body is the area for mounting carbide cutting tools. A positioning semi-cylinder along the midline of the base of the triangle is designed at the midpoint of the base of the triangle. The bottom of the triangular area for mounting carbide cutting tools is a platform for positioning carbide cutting tools. The shape of the carbide cutting tool is similar to the triangle at the top of the tool body, and its size is equal to or slightly larger than the triangle at the top of the tool body; a semi-cylindrical groove structure that mates with the positioning semi-cylindrical cylinder is designed at the midpoint of the base of the triangle on the back of the carbide cutting tool along the center line, forming a parallel constraint with the positioning semi-cylindrical cylinder. When the cutter body and the carbide insert are installed, the horizontal positioning table of the cutter body mates with the bottom surface of the carbide insert, the positioning semi-cylinder of the cutter body mates with the semi-cylinder groove of the carbide insert, and they are fastened with hexagonal screws. The height of the positioning semi-cylinder is four-fifths of the midline of the base of the triangle; Two threaded holes for fixing carbide inserts are designed at one-quarter and three-quarters of the height of the positioning semi-cylinder; threaded holes for fixing carbide inserts are designed at one-quarter and three-quarters of the groove of the positioning semi-cylinder of the carbide insert, and these threaded holes are coaxially matched with the threaded holes on the cutter body and are fastened with corresponding screws. The thickness of the table surface is slightly less than the thickness of the carbide cutting tool.

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