Spherical groove milling cutter

Abstract

The utility model discloses a spherical groove milling cutter, and particularly relates to the technical field of groove milling cutters, which comprises a cutter handle, a connecting block is fixedly arranged at the bottom of the cutter handle, a cutting mechanism is fixedly arranged at the bottom of the connecting block, the cutting mechanism comprises a deep groove wall rod fixedly arranged at the bottom of the connecting block, and a cutter head is fixedly arranged at the bottom of the deep groove wall rod. A plurality of spherical blades are fixedly arranged on the surface of the tool bit, and a front end platform is arranged at the bottoms of the spherical blades. According to the ball cutter, the loss of the cutter can be reduced, the service life of the cutter is prolonged, meanwhile, the production efficiency is improved, the allowance is removed as much as possible during rough machining, the stress of the finish machining ball cutter is reduced, the service life of the cutter is further prolonged, the abrasion resistance is enhanced, frequent replacement caused by abrasion is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of slot milling cutters, and more specifically, to a spherical slot milling cutter. Background Art

[0002] Milling is a processing method widely used in the field of mechanical processing. It uses a rotating tool to cut the workpiece to obtain the required shape and size. Spherical milling cutters are mainly used for cutting arc surfaces and are used for surface forming and special-shaped contour processing.

[0003] The blade of the existing spherical milling cutter is generally made of materials such as cemented carbide, ceramic, cermet, cubic boron nitride, etc., which is relatively expensive. In addition, the existing milling cutter is fixed by a clamping method. The outer diameter of the shank is basically the same as the outer diameter of the widest part of the blade. The milling cutter is a consumable part. At present, this structure of the milling cutter is wasteful and cannot improve cutting efficiency.

[0004] After searching, the Chinese patent with authorization announcement number CN204234849U discloses a spherical milling cutter. During cutting, only the bottom of the blade and the area around the bottom are in contact with the workpiece. Therefore, the blade of the spherical milling cutter is set into a hemispherical structure or an umbrella-shaped structure, which can save the material of the blade part. At the same time, the utility model reduces the outer diameter of the shank, so that the outer diameter of the milling cutter shank is smaller than the outer diameter of the widest part of the blade, further saving the material of the shank part. Since the entire shank is accommodated in the milling cutter fixing seat, the strength and working stability of the milling cutter can be fully guaranteed. Moreover, the reduction in the outer diameter of the milling cutter shank can make the volume of the milling cutter fixing seat smaller. Under the premise of ensuring the working stability of the milling cutter and realizing all the functions of the existing milling cutter, the utility model saves energy and raw materials and improves the cost performance of the product.

[0005] However, when this structure is actually used, when processing semicircular deep grooves, the bottom of the groove is semicircular, and the round nose milling cutter cannot mill to the bottom of the groove, resulting in a large margin at the bottom of the groove. As a result, the cutting force of the ball cutter decreases as it moves to the head during fine processing, and the ball nose milling cutter is subjected to greater force, making its tool not durable and prone to chipping and breaking. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a spherical slot milling cutter to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A spherical slot milling cutter comprises a tool handle, a connecting block is fixedly provided at the bottom of the tool handle, and a cutting mechanism is fixedly provided at the bottom of the connecting block;

[0009] The cutting mechanism includes a deep groove wall rod fixedly arranged at the bottom of the connecting block, a cutter head fixedly arranged at the bottom of the deep groove wall rod, a plurality of spherical blades fixedly arranged on the surface of the cutter head, and a front end platform arranged at the bottom of the plurality of spherical blades.

[0010] By adopting the above technical solution: in order to reduce tool wear, thereby increasing tool life and improving production efficiency.

[0011] As a further description of the above technical solution: the number of the spherical blades is set to four, a chip groove is provided between adjacent spherical blades, a protective layer is fixedly provided on the surface of the spherical blade, and the protective layer is made of high-hardness blue nano material.

[0012] By adopting the above technical solution: in order to improve the hardness and wear resistance of the cutting edge, the service life of the tool is extended.

[0013] As a further description of the above technical solution: the bottom of the spherical blade is fixedly connected to the front end platform, a flat-bottomed blade is fixedly provided at one end of the spherical blade, a cutting surface and a protective surface are fixedly provided on one side of the spherical blade, and the cutting surface is provided on one side of the protective surface.

[0014] By adopting the above technical solution: in order to avoid the state where there is no cutting force on the top of the ball cutter and the workpiece is crowded, the force on the tool is reduced, and at the same time the cutting allowance for fine machining is greatly reduced.

[0015] The technical effects and advantages of this utility model are:

[0016] 1. By setting up a cutting mechanism, compared with the existing technology, the flat bottom blade avoids the state where the top of the ball cutter has no cutting force and is squeezed hard with the workpiece, while reducing the force on the tool. The spherical blade allows the tool to penetrate deep into the groove bottom during roughing, greatly reducing the cutting allowance for fine processing, thereby reducing the force on the fine processing ball cutter, thereby improving the tool life. The deep groove wall rod is smaller than the diameter of the spherical blade. mm, thereby allowing the tool to cut deep grooves deep into the workpiece material, effectively reducing the cutting force, thereby reducing tool wear and preventing workpiece deformation. In addition, the protective layer enhances wear resistance, reduces frequent replacement due to wear, and enhances strength to prevent deformation, thereby improving production efficiency and product quality.

[0017] 2. By setting a tool holder, a connecting block, a deep groove wall rod and a spherical blade, compared with the existing technology, the tool holder is connected to the external processing equipment, wherein the tool holder, the connecting block and the deep groove wall rod are of an integrated design, which enhances the stability of the work and has good rigidity and strength to ensure that the torque can be stably transmitted and the cutting force can be withstood during the processing. Since the number of spherical blades is set to four, and the cutting edges of the four cutting surfaces are distinct, the cutting efficiency can be improved and the service life can be increased. Moreover, during the cutting process, the chips are drawn into the chip groove under the rotation and feed action of the spherical blade and are quickly discharged without weakening the strength of the spherical blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the overall front view structure of the utility model.

[0020] Figure 3 This is a schematic structural diagram of the cutting mechanism of the present utility model.

[0021] Figure 4 For the utility model Figure 1 Enlarged cross-sectional structural diagram at point A in the middle.

[0022] Figure 5 This is a schematic diagram of the working state structure of the utility model.

[0023] The accompanying drawings are marked as follows: 1. tool handle; 2. connecting block; 3. deep groove wall rod; 4. tool head; 5. spherical blade; 6. front end platform; 7. chip groove; 8. protective layer; 9. flat bottom blade; 10. cutting surface; 11. protective surface. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] The embodiments of this application disclose Figure 1-5 The spherical slot milling cutter shown includes a handle 1, a connecting block 2 is fixedly provided at the bottom of the handle 1, and a cutting mechanism is fixedly provided at the bottom of the connecting block 2;

[0026] The cutting mechanism includes a deep groove wall rod 3 fixedly arranged at the bottom of the connecting block 2, a cutter head 4 is fixedly arranged at the bottom of the deep groove wall rod 3, a plurality of spherical blades 5 are fixedly arranged on the surface of the cutter head 4, and a front end platform 6 is arranged at the bottom of the plurality of spherical blades 5. The flat bottom blade 9 avoids the state where the top of the ball cutter has no cutting force and is hard squeezed with the workpiece, while reducing the force on the tool. The spherical blade 5 allows the tool to penetrate deep into the bottom of the groove during rough machining, greatly reducing the cutting allowance for fine machining, thereby reducing the force on the ball cutter during fine machining, thereby improving the tool Life, the deep groove wall rod 3 is 0.05mm smaller than the diameter of the spherical blade 5, and can thus cut deep grooves into the workpiece material. The geometric parameters of the tool are a rake angle of 6°, a helix angle of 30°, an end tooth clearance angle of 8°, and a ball tooth clearance angle of 14°. The rake angle, helix angle, end tooth clearance angle and ball tooth clearance angle of the tool are optimized to reduce cutting force, thereby reducing tool wear and preventing workpiece deformation. Since the processed material is stainless steel, the cutting edge of the cutting surface 10 of the spherical blade 5 must be passivated by 0.005mm to reduce chipping.

[0027] Reference Figure 2-3 As shown, the number of spherical blades 5 is set to four, and a chip groove 7 is set between adjacent spherical blades 5. A protective layer 8 is fixedly set on the surface of the spherical blade 5. The protective layer 8 is made of high-hardness blue nano material. As the spherical blade 5 rotates and contacts the feed workpiece, the spherical blade 5 squeezes and shears the workpiece material. At the same time, the number of spherical blades 5 is set to four, and the four cutting surfaces 10 have distinct cutting edges, which can improve the cutting efficiency and service life. In addition, during the cutting process, the chips are rolled into the chip groove 7 under the action of the rotation and feed of the spherical blade 5. The chip groove 7 is also spiral, and the axial component force generated by its helix angle is used to move the chips along the workpiece. The chips are discharged to the rear of the spherical blade 5, and the helix angle is set to 30°, which helps to quickly discharge the chips without weakening the strength of the spherical blade 5. The protective layer 8 is made of high-hardness blue nanomaterial and has good wear resistance. The high hardness can effectively resist these external forces, reduce the wear on the surface of the material, thereby extending the service life of the material. At the same time, it maintains good shape and dimensional accuracy during long-term operation and use, reducing frequent replacement due to wear. Secondly, it has high rigidity and strength and is not easy to deform, ensuring that these equipment and tools maintain stable performance during use and improving production efficiency and product quality.

[0028] Reference Figure 4-5As shown, the bottom of the spherical blade 5 is fixedly connected to the front end platform 6, and a flat-bottomed blade 9 is fixedly provided at one end of the spherical blade 5. A cutting surface 10 and a protective surface 11 are fixedly provided on one side of the spherical blade 5. The cutting surface 10 is arranged on one side of the protective surface 11, and the tool handle 1 is connected to the external processing equipment, wherein the tool handle 1, the connecting block 2 and the deep groove wall rod 3 are integrated into one design to enhance the stability of the work, and have good rigidity and strength to ensure that the torque can be stably transmitted and the cutting force can be withstood during the processing. The tool handle 1 is driven by the external processing equipment to rotate at high speed. During rotation, the tool handle 1 drives the connecting block 2 to rotate, the connecting block 2 drives the deep groove wall rod 3 to rotate, the deep groove wall rod 3 drives the cutter head 4 to rotate, and the cutter head 4 drives the spherical blade 5 to rotate, thereby forming a circular motion trajectory for cutting.

[0029] Working principle of this utility model:

[0030] The utility model is a spherical slot milling cutter. When the device is in use, the tool handle 1 is connected to an external processing device, wherein the tool handle 1, the connecting block 2 and the deep groove wall rod 3 are of an integrated design, which enhances the stability of the work and has good rigidity and strength to ensure that the torque can be stably transmitted and the cutting force can be withstood during the processing. The tool handle 1 is driven by the external processing equipment to rotate at high speed. During the rotation, the tool handle 1 drives the connecting block 2 to rotate, the connecting block 2 drives the deep groove wall rod 3 to rotate, the deep groove wall rod 3 drives the cutter head 4 to rotate, and the cutter head 4 drives the spherical blade 5 to rotate, thereby forming a circular motion trajectory for cutting.

[0031] As the spherical blade 5 rotates and contacts the workpiece, the spherical blade 5 squeezes and shears the workpiece material. At the same time, the number of spherical blades 5 is set to four, and the four cutting surfaces 10 have distinct cutting edges, which can improve cutting efficiency and service life. In addition, during the cutting process, the chips are drawn into the chip groove 7 under the action of the rotation and feeding of the spherical blade 5. The chip groove 7 is also spiral-shaped and uses the axial component of force generated by its helix angle to discharge the chips along the groove to the rear of the spherical blade 5. The helix angle is set to 30°, which helps to quickly discharge the chips without weakening the strength of the spherical blade 5.

[0032] At the same time, the flat bottom blade 9 avoids the state where there is no cutting force on the top of the ball cutter and the workpiece is squeezed hard, and the force on the tool is reduced. The spherical blade 5 allows the tool to penetrate deep into the bottom of the groove during rough processing, greatly reducing the cutting allowance for fine processing, thereby reducing the force on the fine processing ball cutter, thereby improving the tool life. The deep groove wall rod 3 is 0.05mm smaller than the diameter of the spherical blade 5, thereby being able to penetrate deep into the workpiece material and cut deep grooves. The geometric parameters of the tool are a front angle of 6°, a helix angle of 30°, an end tooth clearance angle of 8°, and a ball tooth clearance angle of 14°. The front angle, helix angle, end tooth clearance angle and ball tooth clearance angle of the tool are optimized to reduce the cutting force, thereby reducing the wear of the tool and preventing the workpiece from deformation. The material is stainless steel, and the cutting edge of the cutting surface 10 of the spherical blade 5 must be passivated by 0.005mm to reduce chipping. In addition, the protective layer 8 is made of high-hardness blue nanomaterial and has good wear resistance. The high hardness can effectively resist these external forces, reduce the wear on the surface of the material, thereby extending the service life of the material. At the same time, it maintains good shape and dimensional accuracy during long-term operation and use, reducing frequent replacement due to wear. Secondly, it has high rigidity and strength and is not easy to deform, ensuring that these equipment and tools maintain stable performance during use and improving production efficiency and product quality.

[0033] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A spherical slot milling cutter, comprising a cutter handle (1), characterized in that: A connecting block (2) is fixedly provided at the bottom of the tool handle (1), and a cutting mechanism is fixedly provided at the bottom of the connecting block (2); The cutting mechanism comprises a deep groove wall rod (3) fixedly arranged at the bottom of the connecting block (2); a cutter head (4) is fixedly arranged at the bottom of the deep groove wall rod (3); a plurality of spherical blades (5) are fixedly arranged on the surface of the cutter head (4); and a front end platform (6) is provided at the bottom of the plurality of spherical blades (5).

2. The spherical slot milling cutter according to claim 1, characterized in that: The number of the spherical blades (5) is set to four, and chip removal grooves (7) are provided between adjacent spherical blades (5).

3. The spherical slot milling cutter according to claim 1, characterized in that: A protective layer (8) is fixedly provided on the surface of the spherical blade (5), and the protective layer (8) is made of a high-hardness blue nano material.

4. The spherical slot milling cutter according to claim 1, characterized in that: The bottom of the spherical blade (5) is fixedly connected to the front platform (6), and a flat-bottomed blade (9) is fixedly provided at one end of the spherical blade (5).

5. The spherical slot milling cutter according to claim 1, characterized in that: A cutting surface (10) and a protective surface (11) are fixedly provided on one side of the spherical blade (5), and the cutting surface (10) is provided on one side of the protective surface (11).

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