Multi-segment replaceable milling cutter

Abstract

The utility model discloses a multi -section type replaceable milling cutter, including the cutter bar, connecting rod and dismounting subassembly. The utility model has the beneficial effect that: can realize the accurate positioning of cutter bar and connecting rod, can accurately determine the relative position of both in the installation process, makes cutter bar and connecting rod can be connected correctly according to design requirement, guarantees the precision of whole cutter structure, secondly, uses fastening screw to carry out final fixation, and can conveniently complete the installation and dismounting operation. When needing to maintain cutter, replace parts or adjust, can easily separate cutter bar and connecting rod, and the operation is simple and quick, helps to improve work efficiency, more cutting edges can continue cutting in a longer time, do not need to frequently replace blade, improve the processing efficiency, and, after the cutting edge appears a certain degree of wear, can continue working by rotating blade and using other numbered cutting edges, and the utilization of blade is higher.

Description

Technical Field

[0001] This utility model relates to a milling cutter, specifically a multi-section replaceable milling cutter, belonging to the field of milling cutter technology. Background Technology

[0002] A milling cutter is a rotating cutting tool with one or more cutting teeth used for milling operations. During operation, the cutting teeth sequentially and intermittently remove the excess material from the workpiece. Milling cutters are mainly used on milling machines to machine planes, steps, grooves, shaped surfaces, and cut off workpieces. Milling cutters can be broadly classified into flat end mills, ball end mills, bulb nose end mills, form end mills, T-slots, toothed end mills, and roughing cutters, each used for different situations.

[0003] In the prior art, such as the end mill disclosed in announcement number CN213288840U, the circumferential cutting edge is set on only one milling tooth on the circumference of the end mill. This ensures the consistency of the cutting edge during the machining of the end mill, reduces the machining difficulty of the end mill, avoids circumferential cutting edge runout, and thus improves the surface finish of the workpiece cut by the end mill. This solves the problems of surface striations and discoloration that occur when the end mill is machining the workpiece. In the prior art, the tool holder and the cutter head are fixedly connected. When it is necessary to machine deep holes, it is often necessary to replace the tool with a tool with a longer tool holder, which is more troublesome to use. In addition, the cutting edge and the cutter head are integrated in the prior art. When the cutting edge is severely worn, it is not possible to replace the cutting edge specifically. It is often necessary to replace the whole tool, which increases the cost of use. Utility Model Content

[0004] The purpose of this invention is to provide a multi-section replaceable milling cutter to solve at least one of the above-mentioned technical problems.

[0005] The present invention achieves the above objectives through the following technical solution: a multi-segment replaceable milling cutter, comprising a cutter bar, a connecting rod detachably connected to the bottom end of the cutter bar, and a cutter head fixedly connected to the bottom end of the connecting rod;

[0006] A disassembly assembly is fixedly installed between the tool holder and the connecting rod. The disassembly assembly includes a positioning post symmetrically fixedly connected to the top of the connecting rod, a connecting block symmetrically fixedly connected to the bottom of the tool holder, and a fastening screw inserted into the surface of the connecting rod. The fastening screw is slidably connected to the connecting block, and the fastening screw is threadedly connected to the connecting rod.

[0007] The surface of the cutter head is provided with blade replacement components at equal intervals. The blade replacement components include mounting slots arranged in a circular array on the surface of the cutter head and blade bodies fixed to the surface of the cutter head by mounting screws.

[0008] As a further improvement of this utility model: a plug rod is fixedly connected to the bottom end of the tool bar, and the surface of the connecting rod is provided with a plug hole that matches the plug rod.

[0009] As a further improvement of this utility model: the bottom surface of the tool bar is symmetrically provided with positioning holes that are adapted to the positioning pins, and the surface of the connecting rod is symmetrically provided with slots that are adapted to the connecting plugs.

[0010] As a further embodiment of this utility model: a rectangular hole is provided at the bottom of the insertion rod, and four strip-shaped grooves are arranged in a circular array inside the insertion rod. The strip-shaped grooves are connected to the rectangular hole. A fixing block is inserted into the interior of each strip-shaped groove. The fixing block is fixedly connected to the insertion rod. A sliding rod is slidably connected to the surface of the fixing block. A wedge-shaped block is fixedly connected to one end of the sliding rod near the rectangular hole, and a plug is fixedly connected to the other end of the sliding rod. A return spring is fixedly connected between the plug and the fixing block. Both the wedge-shaped block and the plug can slide in the strip-shaped groove. A trapezoidal block is inserted into the insertion hole. The trapezoidal block is fixedly connected by a fixing rod and a connecting rod.

[0011] As a further improvement of this utility model: the surface inclination of the trapezoidal block is adapted to the inclination of the wedge block, and the wedge block and the trapezoidal block can slide relative to each other.

[0012] As a further improvement of this utility model, the size of the rectangular hole is adapted to the size of the trapezoidal block.

[0013] As a further improvement of this utility model: the blade body is octagonal and has eight cutting edges, each of which is numbered.

[0014] As a further improvement of this utility model, the bottom end of the drill bit is fixedly connected to a centering device.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model, by setting up insert blocks, fastening screws, and positioning pins, firstly achieves precise positioning of the tool holder and connecting rod through the cooperation of the insert blocks, positioning pins, slots, and positioning holes. During installation, the relative positions of the two can be quickly and accurately determined, ensuring that the tool holder and connecting rod are correctly connected according to design requirements and guaranteeing the accuracy of the entire tool structure. Secondly, the fastening screws are used for final fixation, facilitating installation and disassembly operations. When maintenance, component replacement, or adjustment of the tool is required, the tool holder and connecting rod can be easily separated, making the operation simple and quick, and helping to improve work efficiency.

[0017] 2. This utility model, by setting a fixing block, sliding rod, plug, return spring, and trapezoidal block, achieves two main benefits: First, precise positioning. Through the cooperation between the plug and the socket, and the subsequent interaction of the wedge block and trapezoidal block, the plug can be accurately inserted into the limiting groove, achieving precise docking between the tool holder and the connecting rod. This helps ensure the positional accuracy of the entire tool structure after installation, effectively improving machining accuracy. Second, a stable connection. When the plug is inserted into the limiting groove, the mutual compression of the trapezoidal block and the wedge block generates a certain resistance. This resistance prevents the plug from easily dislodging from the socket during operation, making the connection between the tool holder and the connecting rod more stable. During milling, the tool is subjected to forces in various directions; a stable connection ensures that the tool holder and the connecting rod will not separate due to external forces, guaranteeing normal tool operation.

[0018] 3. This utility model is equipped with a mounting groove, mounting screws and a blade body. After the blade body is worn or damaged, the detachable design allows users to easily remove and replace the blade without replacing the entire tool, thus reducing the cost of use.

[0019] 4. This utility model features an octagonal insert with eight cutting edges, each numbered. The octagonal insert and eight cutting edges increase the effective cutting area and number of cuts. During milling, more cutting edges can continuously cut for a longer period, reducing the need for frequent insert changes and improving machining efficiency. Furthermore, after the cutting edges show some wear, the insert can be rotated to replace them with cutting edges of different numbers, further increasing insert utilization. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the disassembly structure of the blade body of this utility model;

[0022] Figure 3 This is a schematic diagram of the elevation structure of the blade body of this utility model;

[0023] Figure 4 This is a schematic diagram of the disassembled structure of the tool holder and connecting rod in this utility model. Figure 1 ;

[0024] Figure 5 This is a schematic diagram of the disassembled structure of the tool holder and connecting rod in this utility model. Figure 2 ;

[0025] Figure 6 This is a cross-sectional structural diagram of the cutter head in this utility model;

[0026] Figure 7 for Figure 6Enlarged structural diagram at point A in the middle;

[0027] Figure 8 This is a cross-sectional structural diagram of the connecting rod in this utility model;

[0028] Figure 9 This is a schematic diagram of the connection structure between the trapezoidal block and the wedge block in this utility model.

[0029] In the diagram: 1. Tool holder, 2. Connecting rod, 3. Tool head, 4. Assembly / disassembly assembly, 41. Positioning pin, 42. Connecting insert, 43. Fastening screw, 44. Insert rod, 46. Insertion hole, 48. Fixing block, 49. Wedge block, 5. Blade replacement assembly, 51. Installation groove, 52. Blade body, 53. Installation screw;

[0030] 410. Slide rod; 411. Return spring; 412. Plug; 413. Limiting groove; 414. Trapezoidal block; 415. Positioning hole; 416. Slot; 417. Rectangular hole; 418. Strip groove. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0032] like Figures 1 to 9 As shown, a multi-section replaceable milling cutter includes a cutter shank 1, a connecting rod 2 detachably connected to the bottom end of the cutter shank 1, and a cutter head 3 fixedly connected to the bottom end of the connecting rod 2;

[0033] A disassembly assembly 4 is fixedly installed between the tool holder 1 and the connecting rod 2. The disassembly assembly 4 includes a positioning post 41 symmetrically fixedly connected to the top of the connecting rod 2, a connecting block 42 symmetrically fixedly connected to the bottom of the tool holder 1, and a fastening screw 43 inserted into the surface of the connecting rod 2. The fastening screw 43 is slidably connected to the connecting block 42, and the fastening screw 43 is threadedly connected to the connecting rod 2. This enables precise positioning of the tool holder 1 and the connecting rod 2. During installation, the relative positions of the two can be quickly and accurately determined, so that the tool holder 1 and the connecting rod 2 can be correctly connected according to the design requirements, ensuring the accuracy of the entire tool structure.

[0034] The surface of the cutter head 3 is provided with blade replacement components 5 at equal intervals. The blade replacement components 5 include mounting grooves 51 arranged in a circular array on the surface of the cutter head 3 and blade bodies 52 fixed to the surface of the cutter head 3 by mounting screws 53. During milling, more cutting edges can continue to cut for a longer period of time, without frequent blade replacement, thus improving processing efficiency. Example 2

[0035] In addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0036] The bottom end of the tool holder 1 is fixedly connected to the insertion rod 44, and the surface of the connecting rod 2 is provided with an insertion hole 46 that is compatible with the insertion rod 44.

[0037] The bottom surface of the tool holder 1 is symmetrically provided with positioning holes 415 that are adapted to the positioning post 41, and the surface of the connecting rod 2 is symmetrically provided with slots 416 that are adapted to the connecting insert block 42.

[0038] The bottom end of the insertion rod 44 is provided with a rectangular hole 417. The inside of the insertion rod 44 is provided with four strip grooves 418 in a circular array. The strip grooves 418 and the rectangular hole 417 are connected. A fixing block 48 is inserted into each strip groove 418. The fixing block 48 and the insertion rod 44 are fixedly connected. A slide rod 410 is slidably connected to the surface of the fixing block 48. A wedge block 49 is fixedly connected to one end of the slide rod 410 near the rectangular hole 417. A plug 412 is fixedly connected to the other end of the slide rod 410. A return spring 411 is fixedly connected between the plug 412 and the fixing block 48. Both the wedge block 49 and the plug 412 can slide in the strip groove 418. A trapezoidal block 414 is inserted into the insertion hole 46. The trapezoidal block 414 is fixedly connected to the fixing rod and the connecting rod 2. The inner surface of the connecting rod 2 is provided with four limiting grooves 413 in a circular array that are adapted to the plug 412.

[0039] Through the cooperation of the insertion rod 44 and the insertion hole 46, and the subsequent interaction of the wedge block 49 and the trapezoidal block 414, the plug 412 can be accurately inserted into the limiting groove 413, realizing the precise docking between the tool holder 1 and the connecting rod 2. This helps to ensure the positional accuracy of the entire tool structure after installation and can effectively improve the machining accuracy. When the plug 412 is inserted into the limiting groove 413, the mutual squeezing of the trapezoidal block 414 and the wedge block 49 will generate a certain resistance. This resistance can prevent the insertion rod 44 from easily coming out of the insertion hole 46 during operation, making the connection between the tool holder 1 and the connecting rod 2 more stable. During the milling process, the tool will be subjected to forces in various directions. The stable connection can ensure that the tool holder 1 and the connecting rod 2 will not separate due to external forces, ensuring the normal operation of the tool.

[0040] The surface inclination of trapezoidal block 414 is adapted to the inclination of wedge block 49, and wedge block 49 and trapezoidal block 414 can slide relative to each other. By changing the position of trapezoidal block 414, wedge block 49 can be squeezed to move horizontally, thereby allowing plug 412 to be inserted into limiting groove 413.

[0041] The dimensions of the rectangular hole 417 and the trapezoidal block 414 are matched to facilitate the smooth entry of the trapezoidal block 414 into the rectangular hole 417. Example 3

[0042] In addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0043] The insert body 52 is octagonal and has eight cutting edges. Each cutting edge is numbered. During milling, more cutting edges can continue cutting for a longer period of time without frequent replacement of the insert body 52, thus improving machining efficiency. Moreover, after the cutting edges have worn to a certain extent, the insert body 52 can be rotated to replace the cutting edges with other numbers to continue working, making the utilization rate of the insert body 52 even higher.

[0044] Working principle: When using this type of milling cutter to process the workpiece, first connect and fix the cutter bar 1 and the connecting rod 2. During connection, insert the insert rod 44 into the insertion hole 46 and insert the positioning pin 41 into the positioning hole 415. Then press the cutter bar 1 so that the insert rod 44 is inserted into the bottom of the insertion hole 46.

[0045] During this process, as the insertion rod 44 is inserted, the trapezoidal block 414 enters the rectangular hole 417, simultaneously pressing the wedge block 49 to move. The four wedge blocks 49 move synchronously, thereby driving the sliding rod 410 connected to their surfaces to slide on the surface of the fixed block 48. This allows the plug 412 at the end of each sliding rod 410 to move out of the insertion rod 44. At this time, the return spring 411 is in a compressed state until the insertion rod 44 is inserted into the bottom of the socket 46. At this time, under the resistance of the trapezoidal block 414, the four wedge blocks 49 cause the plug 412 to move out of the socket 46. 12 is inserted into the limiting groove 413 to complete the docking of the plug 44 and the connecting rod 2. When the plug 412 is inserted into the limiting groove 413, the mutual squeezing of the trapezoidal block 414 and the wedge block 49 will generate a certain resistance. This resistance can prevent the plug 44 from easily coming out of the socket 46 during the working process, making the connection between the tool holder 1 and the connecting rod 2 more stable. During the milling process, the tool will be subjected to forces in various directions. The stable connection can ensure that the tool holder 1 and the connecting rod 2 will not separate due to the action of external forces, ensuring the normal operation of the tool.

[0046] During this process, ensure that the connecting block 42 can be inserted into the slot 416, then ensure that the position between the tool bar 1 and the connecting rod 2 remains unchanged, and tighten the fastening screw 43 to fix the tool bar 1 and the tool head 3.

[0047] Then connect the tool holder 1 to the machine tool connector, and the machine tool can be started to process the workpiece. During the processing, when the milling cutter edge is severely worn, the mounting screw 53 can be removed, and then the insert body 52 can be rotated so that the other cutting edges can continue milling. When the cutting edges on the surface of the insert body 52 are worn out, the insert body 52 can be replaced as a whole. During the milling process, more cutting edges can continue to cut for a longer period of time without frequent replacement of the insert body 52, which improves processing efficiency. Moreover, after the cutting edge has worn to a certain extent, the insert body 52 can be rotated to replace it with a cutting edge of a different number to continue working, making the utilization rate of the insert body 52 higher.

[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-section replaceable milling cutter, comprising a cutter shank (1), a connecting rod (2) detachably connected to the bottom end of the cutter shank (1), and a cutter head (3) fixedly connected to the bottom end of the connecting rod (2); Its features are: A disassembly assembly (4) is fixedly provided between the tool bar (1) and the connecting rod (2). The disassembly assembly (4) includes a positioning post (41) symmetrically fixedly connected to the top of the connecting rod (2), a connecting block (42) symmetrically fixedly connected to the bottom of the tool bar (1), and a fastening screw (43) inserted into the surface of the connecting rod (2). The fastening screw (43) is slidably connected to the connecting block (42), and the fastening screw (43) is threadedly connected to the connecting rod (2). The blade replacement assembly (5) is provided at equal intervals on the surface of the blade head (3). The blade replacement assembly (5) includes mounting grooves (51) arranged in a circular array on the surface of the blade head (3) and a blade body (52) fixed to the surface of the blade head (3) by mounting screws (53).

2. The multi-section replaceable milling cutter according to claim 1, characterized in that: The bottom end of the knife bar (1) is fixedly connected to a plug rod (44), and the surface of the connecting rod (2) is provided with a plug hole (46) that is compatible with the plug rod (44).

3. The multi-section replaceable milling cutter according to claim 1, characterized in that: The bottom surface of the cutter bar (1) is symmetrically provided with positioning holes (415) that are adapted to the positioning post (41), and the surface of the connecting rod (2) is symmetrically provided with slots (416) that are adapted to the connecting plug (42).

4. The multi-section replaceable milling cutter according to claim 2, characterized in that: The bottom end of the insertion rod (44) is provided with a rectangular hole (417). The inside of the insertion rod (44) is provided with four strip grooves (418) in a circular array. The strip grooves (418) are connected to the rectangular hole (417). A fixing block (48) is inserted into the inside of each strip groove (418). The fixing block (48) is fixedly connected to the insertion rod (44). A sliding rod (410) is slidably connected to the surface of the fixing block (48). A wedge block (49) is fixedly connected to one end of the sliding rod (410) near the rectangular hole (417). The other end of the slide bar (410) is fixedly connected to a plug (412). A return spring (411) is fixedly connected between the plug (412) and the fixing block (48). The wedge block (49) and the plug (412) can slide in the strip groove (418). A trapezoidal block (414) is inserted into the socket (46). The trapezoidal block (414) is fixedly connected to the connecting rod (2) through the fixing rod. The inner surface of the connecting rod (2) is provided with four limiting grooves (413) that are adapted to the plug (412) in a circular array.

5. The multi-section replaceable milling cutter according to claim 4, characterized in that: The surface inclination of the trapezoidal block (414) is adapted to the slope inclination of the wedge block (49), and the wedge block (49) and the trapezoidal block (414) can slide relative to each other.

6. The multi-section replaceable milling cutter according to claim 4, characterized in that: The dimensions of the rectangular hole (417) are adapted to the dimensions of the trapezoidal block (414).

7. The multi-section replaceable milling cutter according to claim 1, characterized in that: The blade body (52) is octagonal and has eight cutting edges, each of which is numbered.

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