Cutter structure capable of repeatedly using outwards-convex circular blade

Abstract

The utility model discloses a cutter structure capable of repeatedly using a convex circular blade, which comprises a cutter head main body, cutting teeth are arranged on the periphery of the cutter head main body in a surrounding way, an inner step surface for fixing the convex circular blade is arranged in the outer cutting surface of the cutter head main body, the convex circular blade is detachably arranged in the inner step surface, and the cutter head main body is provided with a plurality of convex circular blades. And the blades can partially protrude out of the outer side of the cutterhead main body, so that the blades can effectively cut during rotation, and only part of the blades are exposed outside.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining tools, and particularly relates to a tool structure capable of repeatedly using convex round blades. Background Art

[0002] In the field of manufacturing railway switches in traditional rail transit, it is necessary to mill the working edges of common rail parts such as switch rails, long and short switch points. At present, large CNC machine tools + large-diameter formed tools are mostly used for powerful milling at home and abroad. The formed milling cutter is assembled by arranging blades with various different contour shapes to fit the required linear contour. To achieve the purpose of powerful milling, "gravity milling blades" are used for the formed tool. For example, N18-1 (cuboid), N134 (outer R16) and other blades are mostly used for the working milling cutter.

[0003] At present, the "gravity milling blades" applied in the field of switch manufacturing in China are also standardized and serialized, and are mostly customized by grinding with tungsten carbide and cobalt-carbide cuboid substrates with dimensions of (15.875x12.7x7.94), such as N134 (outer R16) blades. During the milling process, the N134 (outer R16) blade mainly uses the arc-shaped cutting edge of the blade for cutting. After the arc contour of the arc-shaped cutting edge is worn, it is no longer used, resulting in great waste. Considering several large domestic switch production enterprises, the total annual consumption of similar blades is about 8 million yuan. Usually, after the arc cutting edge of the N134 (outer R16) blade is used up, the blade is scrapped, and there are still two "15.875 long cutting edge" and two "12.7 short cutting edges" usable parts. If they can be developed and utilized, at least more than 1 million yuan can be saved annually. Therefore, it is very necessary to Continuous improvement the existing tools so as to be able to reuse the blades, give full play to the role of the blades, save funds and reduce production costs.

[0004] Especially in rotary cutting operations such as milling and turning, the design and structure of the tool directly affect the machining efficiency, machining quality and the service life of the tool. Generally, a tool includes a tool disc on which cutting blades are installed.

[0005] In the prior art, the blades on the tool disc are usually fixedly installed, or although they can be replaced, the replacement process is complex and requires professional tools and skills. In addition, the fixing method of the traditional blade on the tool disc may cause insufficient stability of the blade during high-speed rotation, prone to displacement or falling off, affecting the machining accuracy and possibly causing safety hazards. At the same time, the cutting efficiency and chip removal ability of the blade are also important factors affecting the machining performance. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a tool structure capable of repeatedly using convex round blades to solve the problems raised in the above background art.

[0007] To achieve the above object, the utility model adopts the following technical solution: comprising a cutter head main body, a cutting tooth is disposed around the outer periphery of the cutter head main body, and an inner stepped surface + curved surface structure for fixing the convex circular blade is provided in the outer cutting surface thereof. The convex circular blade can be conveniently installed in the inner stepped surface + curved surface, which is stable and reliable, has high repeat positioning accuracy, and can partially protrude outside the cutter head main body, so that the blade can effectively perform cutting during rotation and form a continuous cutting edge.

[0008] In the radial direction, the main cutting edge (15.875) of the blade is exposed to form a peripheral milling cutter;

[0009] If a part of the blade is exposed in the axial direction, an end milling cutter or a three-sided milling cutter is formed.

[0010] Preferably, positioning bosses having the same convex arc as the convex circular blade are provided on both sides of the inner stepped surface.

[0011] Further, the arc surface in the positioning boss is higher than the stepped surface of the inner stepped surface, the purpose of which is to reduce the machining range of the concave curved surface and avoid drilling and tapping threads on the concave curved surface.

[0012] Preferably, a relief groove is provided on one side of the inner stepped surface and the concave curved surface close to the axis of the cutter head main body. The depth of the relief groove is lower than the stepped surface of the inner stepped surface to ensure that the contour of the intersection of the arc surface and the side surface in the boss is root cleared.

[0013] Further, stepped curved surfaces matching the positioning bosses extend at both ends of the relief groove for providing an accurate up and down repeat positioning reference for the installation of the blade.

[0014] Furthermore, a relief groove hole is provided at the intersection contour of the stepped curved surface and the side positioning surface for root clearing at the intersection contour of the stepped curved surface and the side positioning surface, so as to realize the accurate installation and fixation of the convex circular blade.

[0015] Furthermore, a relief groove is formed on the arc surface in the positioning boss and the upper and lower stepped curved surfaces with a flat-end milling cutter for root clearing, so as to realize the interference-free, accurate installation and fixation of the convex circular blade.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] 1. The convex circular blade is detachably installed in the inner stepped surface + curved surface, making the replacement work of the blade simple and fast, which can be completed without professional tools. At the same time, since the convex circular blade partially protrudes outside the cutter head main body, the blade can more effectively cut into the workpiece during rotation, thereby improving the cutting efficiency.

[0018] 2. The design of the positioning boss and the stepped surface provides an accurate alignment mechanism for the installation of the blade, ensuring the accuracy of the blade installation position, thereby improving the cutting precision. The flexible relief groove avoids potential assembly interference and is easy to machine. Through the above measures, the displacement or detachment of the blade during high-speed rotation is effectively prevented.

[0019] 3. The design of the chip groove helps to discharge the chips during the cutting process, reduces the accumulation of chips between the tool and the workpiece, and improves the cutting environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0021] Figure 1 is a top view of the present invention;

[0022] Figure 2 is a front view of the present invention;

[0023] Figure 3 is Figure 2 a sectional view of the A surface of

[0024] Figure 4 is a schematic structural view of the inner stepped surface;

[0025] In the figure: 1. Cutter head body; 2. Outer convex circular blade; 3. Cutting teeth; 4. Inner stepped surface; 5. Positioning boss; 6. Relief groove; 7. Stepped surface; 8. Relief groove hole; 9. Side positioning surface; 10. Root clearing surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0027] Referring to Figures 1 - 3 , a technical solution of a tool structure that can reuse an outer convex circular blade proposed by the present invention includes: a cutter head body 1, around the outer periphery of the cutter head body 1, cutting teeth 3 are provided, and an inner stepped surface 4 for fixing the outer convex circular blade 2 is provided in its outer cutting surface. The outer convex circular blade 2 is detachably installed in the inner stepped surface 4 and can partially protrude outside the cutter head body 1, so that the blade can effectively perform cutting during rotation, and only part of the blade is exposed outside.

[0028] Specifically, each of the outwardly convex circular blades 2 in the set of cutting teeth 3 has a certain convex arc, enabling the blade to perform cutting operations better during rotation. At the same time, it reduces the contact area with the material being cut, decreases friction and wear, and increases the service life of the blade.

[0029] Among them, the outwardly convex circular blade 2 can be connected to the inner stepped surface 4 through small screws, snap fasteners or other quick-release and loading structures, facilitating users to replace or grind the blade as needed.

[0030] Refer to Figure 4 , in one of the embodiments, positioning bosses 5 that match the convex arc of the outwardly convex circular blade 2 are provided on both sides of the inner stepped surface 4 to adapt to and fix the shape of the outwardly convex circular blade 2, ensuring its stable installation on the cutter head body 1.

[0031] Furthermore, the arc surface in the positioning boss 5 is higher than the stepped surface of the inner stepped surface 4, such that when the outwardly convex circular blade 2 is inserted into the positioning boss 5, the arc surface is slightly higher than the stepped surface.

[0032] Specifically, this height setting has multiple advantages: First, it ensures sufficient contact area between the blade and the cutter head body 1 after installation, enhancing the stability of the blade; Second, since the arc surface is higher than the stepped surface, it can provide better support and protection during cutting, reducing the risk of the blade being displaced or damaged due to lateral forces; Third, this structure also facilitates the flow and discharge of cutting fluid or coolant, helping to improve the cooling and lubrication conditions in the cutting area, thereby extending the service life of the blade and enhancing cutting efficiency; Fourth, at the same time, it reduces the machining range of the concave curved surface during tool manufacturing, avoiding drilling and tapping on the concave curved surface.

[0033] In addition, the design that the arc surface is higher than the stepped surface of the inner stepped surface 4 also means that when the blade needs to be replaced or ground, users can more easily remove the blade from the positioning boss 5 because the blade is not completely recessed below the stepped surface but partially protrudes from the surface of the cutter head body 1. This not only simplifies the maintenance work but also avoids potential damage to other parts of the tool when disassembling the blade.

[0034] In one of the embodiments, a relief groove 6 is provided on the side of the inner stepped surface 4 close to the axis of the cutter head body 1. The relief groove 6 is on the same horizontal plane as the stepped surface of the inner stepped surface 4, and stepped curved surfaces 7 that cooperate with the positioning bosses 5 extend at both ends thereof, providing an accurate alignment mechanism for the installation of the blade.

[0035] Specifically, the combination of the stepped surface 7 and the positioning boss 5 enables the blade to smoothly slide into the groove when installed in the cutter head body 1 and automatically align to the correct position. This self-aligning feature reduces the fine adjustment work required by the operator when replacing the blade, simplifies the installation process, speeds up tool maintenance, and reduces the potential risks caused by improper human operation.

[0036] In addition, since the relief groove 6 and the stepped surface of the inner stepped surface 4 are on the same horizontal plane, this helps to maintain the stability of the blade and avoid unnecessary vibration or movement during cutting. At the same time, this design is also beneficial to keeping the cutter head surface clean and tidy, because debris and small particles can be easily cleaned from the horizontal plane without accumulating in the groove or step.

[0037] Specifically, the relief groove holes 8 at both ends of the stepped surface 7 are for further ensuring that the outer convex circular blade 2 can be accurately positioned in the groove during installation. Avoid assembly interference to ensure the correct installation of the blade, preventing rotation or displacement.

[0038] The above is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent replacements or changes should be covered within the protection scope of the present utility model.

Claims

1. A tool structure that can reuse an outer convex circular blade, characterized in that: include: A cutter disc body (1), wherein the cutter disc body (1) is provided with cutting teeth (3) around its outer circumference, and an inner step surface (4) for fixing an outer convex circular blade (2) is provided in its outer cutting surface, wherein the outer convex circular blade (2) is detachably mounted in the inner step surface (4) and can partially protrude from the outer side of the cutter disc body (1), so that the blade can effectively cut when rotating, and only a portion of the blade is exposed to the outside.

2. A tool structure with a reusable outer convex circular blade according to claim 1, characterized in that: A positioning boss (5) having the same convex curvature as that of the outer convex circular blade (2) is arranged on both sides of the inner step surface (4).

3. A tool structure with a reusable outer convex circular blade according to claim 2, characterized in that: The arc surface in the positioning boss (5) is higher than the step surface of the inner step surface (4), the purpose of which is to reduce the processing range of the concave surface and avoid drilling and tapping on the concave surface.

4. The tool structure of the reusable outer convex circular blade according to claim 2, characterized in that: A tool retreat groove (6) is provided on one side of the inner step surface (4) and the positioning boss (5) close to the axis of the cutter disc body (1). The depth of the tool retreat groove (6) is lower than the step surface with the inner step surface (4), so as to ensure that the contour of the intersection of the arc surface in the boss (5) and the side positioning surface (9) is cleared.

5. The tool structure of the reusable outer convex circular blade according to claim 4, characterized in that: Both ends of the blade retreat groove (6) are extended with stepped curved surfaces (7) that match the positioning boss (5) and are used to provide an accurate up and down repeated positioning reference for the installation of the blade.

6. The tool structure of the reusable outer convex circular blade according to claim 5, characterized in that: A cutter backing groove hole (8) is provided at the intersection of the step curved surface (7) and the side positioning surface (9) for cleaning the bottom of the intersection of the step curved surface (7) and the side positioning surface (9), thereby achieving accurate installation and fixation of the external convex circular blade (2).

7. A tool structure with a reusable outer convex circular blade according to claim 6, characterized in that: The arc surface in the positioning boss (5) and the upper and lower stepped curved surfaces (7) are provided with a flat-bottomed milling cutter to form a back-cut groove for cleaning the root surface (10), thereby achieving interference-free, precise installation and fixation of the external convex circular blade (2).

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