Combined alloy tool bit

Abstract

The utility model discloses a combined alloy cutter bit, which relates to the technical field of milling cutters and comprises a cutter bar and a cutter bit dismounting device. A circular mounting groove is formed in the bottom of the cutter bar; the tool bit dismounting device comprises a connecting cylindrical block, an alloy tool bit, four positioning clamping blocks, a fixing block and a bolt, the connecting cylindrical block is slidably connected into the circular mounting groove, the alloy tool bit is fixedly connected to the lower end of the connecting cylindrical block, the fixing block is fixedly connected to the top of the connecting cylindrical block, and the fixing block is slidably connected into the circular mounting groove; a fixing clamping hole is formed in the surface of the fixing block, a bolt is installed in the cutter bar and clamped in the fixing clamping hole in a sliding mode, a containing round hole is formed in the surface of the cutter bar, a worker does not need to replace the cutter bar and the alloy cutter head as a whole, only the damaged alloy cutter head needs to be replaced, and the old cutter bar can still continue to be used; and waste caused by replacement of the milling cutter is reduced, so that economic loss of a factory is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutters, and particularly relates to a combined alloy cutter head. Background Art

[0002] A milling cutter is a rotating cutter with one or more cutting teeth used for milling. During operation, each cutting tooth intermittently cuts off the surplus of the workpiece in turn. Milling cutters are mainly used for machining planes, steps, grooves, formed surfaces, cutting workpieces, etc. on milling machines. Milling cutters with different shapes are used for different purposes. Ball-end milling cutters are mainly used for semi-finishing and finishing of curved surfaces. Small ball-end milling cutters can finish machining small chamfers on steep surfaces / straight walls and irregular contour surfaces.

[0003] The currently disclosed patent: CN214291036U discloses a double-edge ball-end alloy milling cutter. In this double-edge ball-end alloy milling cutter, the chromium alloy layer is fixed between the titanium nitride coating and the chromium nitride coating by thermal spraying technology, and its thickness is 4μm, which enhances the anti-adhesion effect of the milling cutter. Depending on its own alloy metal layer structure, it protects the internal structure and enhances the hardness of the milling cutter. The chemical bonding layer is a high-temperature resistant inorganic adhesive, which is a high-temperature resistant inorganic nano composite binder made by polycondensation reaction of inorganic nano materials. Its maximum temperature resistance is 1800℃, which ensures the stability of the overall structure of the milling cutter and ensures that the chemical bonding layer structure can withstand the spraying high temperature of other coatings and prevent the penetration and damage of high-temperature chips.

[0004] Based on the above search, the following problems exist in the use of the above patent: The double-edge ball-end alloy milling cutter can ensure that the chemical bonding layer structure can withstand the spraying high temperature of other coatings and prevent the penetration and damage of high-temperature chips. However, this double-edge ball-end alloy milling cutter is an integral structure. Since only the cutter head is needed for milling during the use of the alloy milling cutter, when the cutter head is damaged after long-term use, the entire cutter head and cutter bar need to be replaced. Since the cutter bar is not damaged, especially for milling cutters with a long cutter bar, replacing the milling cutter will cause great waste and result in a large economic loss to the factory. Summary of the Utility Model

[0005] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and provide a combined alloy cutter head, which can solve the problem that when the cutter head is damaged after long-term use, the entire cutter head and cutter bar need to be replaced. Since the cutter bar is not damaged, especially for milling cutters with a long cutter bar, replacing the milling cutter will cause great waste and result in a large economic loss to the factory.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A combined alloy tool bit, comprising a tool shank and a tool bit disassembly device; a circular mounting groove is opened at the bottom of the tool shank; the tool bit disassembly device includes a connecting cylindrical block, an alloy tool bit, four positioning blocks, a fixing block and a bolt. The connecting cylindrical block is slidably connected inside the circular mounting groove. The alloy tool bit is fixedly connected to the lower end of the connecting cylindrical block. The fixing block is fixedly connected to the top of the connecting cylindrical block. The fixing block is slidably connected inside the circular mounting groove. A fixing hole is opened on the surface of the fixing block. The bolt is installed inside the tool shank. The bolt is slidably clamped inside the fixing hole. A placing round hole is opened on the surface of the tool shank. The nut of the bolt is hidden inside the placing round hole.

[0007] Preferably, two cutting edges are opened on the surface of the alloy tool bit.

[0008] Preferably, four positioning slots are equidistantly opened in a circular shape on the surface of the connecting cylindrical block.

[0009] Preferably, the four positioning blocks are fixedly connected to the inner wall of the circular mounting groove in a circular and equidistant manner. The four positioning blocks are respectively slidably connected inside the four positioning slots.

[0010] Preferably, a sealing gasket is slidably sleeved on the surface of the connecting cylindrical block.

[0011] Preferably, a circular convex block is fixedly connected to the bottom of the tool shank. The surface of the circular convex block is in contact with the surface of the sealing gasket.

[0012] Compared with the prior art, the beneficial effects of the present utility model are:

[0013] 1. For this combined alloy tool bit, the staff can rotate the bolt again through a wrench and make the bolt move into the fixing hole to fixedly install the alloy tool bit at the bottom of the tool shank. At this time, the bolt is hidden inside the placing round hole and will not affect the surface of the tool holder clamping the tool shank. At this time, the staff no longer needs to replace the whole tool shank and the alloy tool bit. As long as the damaged alloy tool bit is replaced, the old tool shank can still be used continuously, reducing the waste caused by replacing the milling cutter, thereby reducing the economic loss of the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0015] Figure 1 It is a schematic diagram of the overall structure of a combined alloy tool bit of the present utility model;

[0016] Figure 2 It is a schematic cross-sectional structure diagram of the tool shank of the present utility model;

[0017] Figure 3Schematic diagram of the top structure of the alloy tool bit of the present utility model;

[0018] Figure 4 Schematic diagram of the bottom structure of the tool shank of the present utility model;

[0019] Figure 5 Schematic diagram of the surface structure of the gasket of the present utility model.

[0020] Reference numerals: 1, tool shank; 2, circular mounting groove; 3, connecting cylindrical block; 4, alloy tool bit; 5, cutting edge; 6, positioning card slot; 7, positioning card block; 8, fixing block; 9, fixing card hole; 10, bolt; 11, placing round hole; 12, gasket; 13, annular convex block. Detailed implementation manners

[0021] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation on the protection scope of the present utility model.

[0022] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the present utility model.

[0023] In the description of the present utility model, greater than, less than, exceeding, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0024] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0025] Please refer to Figures 1-5, the present utility model provides a technical solution: a combined alloy tool bit, which includes a tool shank 1 and a tool bit disassembly device. A circular installation groove 2 is opened at the bottom of the tool shank 1. The tool bit disassembly device includes a connecting cylindrical block 3, an alloy tool bit 4, four positioning blocks 7, a fixing block 8 and a bolt 10. The connecting cylindrical block 3 is slidably connected inside the circular installation groove 2. The alloy tool bit 4 is fixedly connected to the lower end of the connecting cylindrical block 3. Two cutting edges 5 are opened on the surface of the alloy tool bit 4. Four positioning slots 6 are circularly and equidistantly opened on the surface of the connecting cylindrical block 3. Four positioning blocks 7 are circularly and equidistantly fixedly connected to the inner wall of the circular installation groove 2. The four positioning blocks 7 are respectively slidably connected inside the four positioning slots 6. The fixing block 8 is fixedly connected to the top of the connecting cylindrical block 3. The fixing block 8 is slidably connected inside the circular installation groove 2. A fixing hole 9 is opened on the surface of the fixing block 8. The bolt 10 is installed inside the tool shank 1. The bolt 10 is slidably clamped inside the fixing hole 9. A placing round hole 11 is opened on the surface of the tool shank 1. The nut of the bolt 10 is hidden inside the placing round hole 11.

[0026] When the alloy tool bit 4 is damaged during long-term use, the staff can rotate the bolt 10 with a wrench and move it out of the fixing hole 9, thereby releasing the fixing effect on the fixing block 8 and the connecting cylindrical block 3. Then, the staff slides the alloy tool bit 4 downward. When the alloy tool bit 4 slides downward, it can drive the connecting cylindrical block 3 and the fixing block 8 to slide downward simultaneously and move out of the circular installation groove 2 to complete the disassembly. Then, the staff takes out a new alloy tool bit 4, slides the connecting cylindrical block 3 to make it enter the circular installation groove 2, and slides the four positioning blocks 7 into the four positioning slots 6. The connection between the four positioning blocks 7 and the four positioning slots 6 can ensure the stability of the connection between the alloy tool bit 4 and the tool shank 1. Then, the staff rotates the bolt 10 again with a wrench and makes the bolt 10 move into the fixing hole 9 to fixedly install the alloy tool bit 4 at the bottom of the tool shank 1. At this time, the bolt 10 is hidden inside the placing round hole 11 and will not affect the tool's clamping of the surface of the tool shank 1. At this time, the staff no longer needs to replace the entire tool shank 1 and the alloy tool bit 4. As long as the damaged alloy tool bit 4 is replaced, the old tool shank 1 can still be used continuously, reducing the waste caused by replacing the milling cutter, thereby reducing the economic loss of the factory.

[0027] A sealing gasket 12 is slidably sleeved on the surface of the connecting cylindrical block 3. An annular convex block 13 is fixedly connected to the bottom of the tool shank 1. The surface of the annular convex block 13 is in contact with the surface of the sealing gasket 12.

[0028] During the process of the staff sliding the connecting cylindrical block 3 into the circular installation groove 2 to install the alloy cutter head 4, the sliding of the connecting cylindrical block 3 can drive the sealing gasket 12 to slide and squeeze on the surface of the annular convex block 13. Furthermore, through the extrusion between the annular convex block 13 and the sealing gasket 12, the sealing performance of the connection between the alloy cutter head 4 and the tool shank 1 can be enhanced, preventing the cutting fluid from entering the circular installation groove 2 and causing rust, thereby avoiding damage inside the tool shank 1 and extending the service life of this combined alloy cutter head.

[0029] Working principle: For this combined alloy cutter head, the staff can rotate the bolt 10 with a wrench and move it out of the fixing hole 9, thereby releasing the fixing effect on the fixing block 8 and the connecting cylindrical block 3. Then, the staff slides the alloy cutter head 4 downward. The downward sliding of the alloy cutter head 4 can drive the connecting cylindrical block 3 and the fixing block 8 to slide downward simultaneously and move out of the circular installation groove 2 to complete the disassembly. Then, the staff takes out a new alloy cutter head 4, slides the connecting cylindrical block 3 into the circular installation groove 2, and slides the four positioning blocks 7 into the four positioning slots 6. The staff rotates the bolt 10 again with a wrench and makes the bolt 10 move into the fixing hole 9 to fixedly install the alloy cutter head 4 at the bottom of the tool shank 1. The sliding of the connecting cylindrical block 3 can drive the sealing gasket 12 to slide and squeeze on the surface of the annular convex block 13. Furthermore, through the extrusion between the annular convex block 13 and the sealing gasket 12, the sealing performance of the connection between the alloy cutter head 4 and the tool shank 1 can be enhanced, preventing the cutting fluid from entering the circular installation groove 2 and causing rust.

[0030] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the said technical field, various changes can be made without departing from the purpose of the present invention.

Claims

1. A combined alloy cutter head, characterized in that: include: A cutter bar (1) and a cutter head disassembly device; A circular mounting groove (2) is provided at the bottom of the knife rod (1); The cutter head disassembly device comprises a connecting cylindrical block (3), an alloy cutter head (4), four positioning blocks (7), a fixing block (8) and a bolt (10); the connecting cylindrical block (3) is slidably connected inside a circular mounting groove (2); the alloy cutter head (4) is fixedly connected to the lower end of the connecting cylindrical block (3); the fixing block (8) is fixedly connected to the top of the connecting cylindrical block (3); the fixing block (8) is slidably connected inside the circular mounting groove (2); a fixing hole (9) is provided on the surface of the fixing block (8); the bolt (10) is installed inside a cutter rod (1); the bolt (10) is slidably connected inside the fixing hole (9); a placement circular hole (11) is provided on the surface of the cutter rod (1); and a nut of the bolt (10) is hidden inside the placement circular hole (11).

2. The combined alloy cutter head according to claim 1, characterized in that: Two cutting edges (5) are provided on the surface of the alloy cutter head (4).

3. The combined alloy cutter head according to claim 1, characterized in that: The surface of the connecting cylindrical block (3) is circular and has four positioning slots (6) equidistantly formed thereon.

4. The combined alloy cutter head according to claim 3, characterized in that: The four positioning blocks (7) are equidistantly and fixedly connected to the inner wall of the circular mounting groove (2) in a circular shape, and the four positioning blocks (7) are respectively slidably connected to the inside of the four positioning grooves (6).

5. The combined alloy cutter head according to claim 1, characterized in that: A sealing gasket (12) is slidably sleeved on the surface of the connecting cylindrical block (3).

6. The combined alloy cutter head according to claim 5, characterized in that: An annular protrusion (13) is fixedly connected to the bottom of the knife rod (1), and the surface of the annular protrusion (13) is in contact with the surface of the sealing gasket (12).

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