Deep hole milling cutter with composite blade

Abstract

The utility model relates to the technical field of deep hole milling cutters, and discloses a composite-edge deep hole milling cutter which comprises a cutter handle, a cutter body is movably connected to the top of the cutter handle, a cutter head is movably connected to the top of the cutter body, a connecting assembly is arranged between the cutter head and the cutter handle, a threaded groove is formed in the connecting assembly, and the threaded groove is communicated with the cutter body. A threaded groove is formed in the bottom of the cutter handle, an expansion bolt movably penetrates through the interior of the cutter handle, the expansion bolt extends into the threaded groove, and a containing groove is formed in the bottom of the cutter handle. The composite-edge deep hole milling cutter has the advantages that compact friction bond stress is formed between the composite-edge deep hole milling cutter and a hole wall, so that the cutter head and the cutter body can be fixed conveniently, mounting and dismounting are more convenient, the situation that a common bolt cannot be dismounted due to rusting and thread slipping is prevented, mounting is firmer, and replacement convenience of the composite-edge deep hole milling cutter is improved.

Description

Technical Field

[0001] This utility model relates to the field of deep hole milling cutter technology, specifically a composite-edge deep hole milling cutter. Background Technology

[0002] In automobile manufacturing, deep hole end mills are used to machine deep holes and complex shapes in parts such as engine blocks and gearbox housings. The working principle of a compound-edge deep hole end mill is to cut by rotating and feeding, using its special cutting edge design. The compound-edge design allows the tool to better adapt to different materials and shapes during the cutting process, improving machining efficiency and accuracy. Deep hole end mills need to have good rigidity and stability to ensure the accuracy and surface quality during the machining process.

[0003] Chinese patent CN222608120U discloses a composite-edge deep hole milling cutter for machining automotive crankshafts. It includes a cutter root base, a first cutter root fixedly mounted on the upper end of the base, a first cutter shank fixedly connected above the first cutter root, a central shaft fixedly mounted at the center of the first cutter root, and a cutting head threadedly mounted on the upper end of the first cutter shank. The cutting head and the first cutter shank can be disassembled and replaced via a threaded connection. When the cutting edge wears down due to prolonged use, the user only needs to replace the cutting head, without replacing the entire cutter head and shank, thus significantly reducing user costs. Furthermore, the cutting coating covering the outer wall of the cutting edge reduces friction and heat during cutting, improving cutting efficiency and tool life. It also facilitates tool mounting on machine tools or other processing equipment. The outer circumference of the first cutter shank has chip removal grooves, which match the outer circumference of the cutting head, enabling rapid chip removal and preventing chip accumulation in the cutting area, thus affecting cutting performance and tool life.

[0004] The above solution uses ordinary threaded rods for fixed connection. Ordinary threaded rods are prone to rust and stripping after long-term use. Rust and stripping can make it very troublesome to disassemble the cutter head, which will affect the efficiency of cutter head replacement. Moreover, stripping can also lead to insecure installation, reducing the stability of a composite cutting edge deep hole end mill. Utility Model Content

[0005] The purpose of this invention is to provide a composite cutting edge deep hole end mill to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a composite cutting edge deep hole milling cutter, including a tool holder, a tool body movably connected to the top of the tool holder, a tool head movably connected to the top of the tool body, a connecting component provided between the tool head and the tool holder, and the tool holder being used for clamping and transmission on a milling machine.

[0007] The connecting component has a threaded groove inside, and an expansion bolt moves through the inside of the tool holder. The expansion bolt extends into the threaded groove. Through its special design, the expansion bolt can effectively enhance the fixing effect, making the splicing more secure.

[0008] Preferably, the bottom of the tool holder is provided with a storage groove, the outer end of the tool holder is provided with multiple base clamping grooves, and multiple cutting edges are fixedly installed on the top of the tool head. The multiple cutting edges will bear a part of the cutting force. By sharing the cutting force, the load on each cutting edge can be reduced, thereby improving the cutting quality and efficiency.

[0009] Preferably, the outer ends of both the cutter body and the cutter head are provided with multiple chip-breaking grooves, and a reinforcing component is provided between the cutter body and the cutter head. A chip-removal groove is provided on the outer end of the cutter body and on one side of the chip-breaking groove. The chip-breaking groove divides the chips into small segments, reducing friction and heat accumulation, thereby improving the chip removal effect and extending the tool life. The chip-removal groove is designed in the form of a groove or channel to help effectively remove chips. During the milling process, the chip-removal groove not only affects the smooth discharge of chips, but also has a direct impact on the feed rate and surface finish.

[0010] Preferably, the connecting component includes an irregular groove, which is formed inside the cutter body. An irregular connecting block is movably connected inside the irregular groove, and the irregular connecting block is fixedly connected to the cutter head. A threaded groove is formed inside the irregular connecting block. The irregular groove and the irregular connecting block are sized to match. By setting an irregular structure, the connection can be strengthened.

[0011] Preferably, the reinforcement component includes reinforcement grooves, and multiple reinforcement grooves are formed on the top of the blade body. Multiple springs are symmetrically fixedly installed inside each reinforcement groove. A T-block is fixedly installed on one side of every two springs. The springs are elastic and can adjust the position of the T-blocks, playing an auxiliary role in the fixing process.

[0012] Preferably, a reinforcing block is movably connected between every two T-blocks, and each reinforcing block has a T-slot symmetrically opened at its outer end. The T-slot and the T-block are movably connected, and the sizes of the T-slot and the T-block are adapted to each other, which can strengthen the connection between the cutter body and the cutter head, and make it more stable during use.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This application, by setting up connecting components, threaded grooves and expansion bolts, uses the axial tensile force generated when tightening the nut to cause the sleeve or wedge-shaped component to expand, forming a tight frictional grip with the hole wall, which facilitates the fixing of the cutter head and cutter body, making installation and disassembly more convenient, preventing the use of ordinary bolts that rust and strip, making disassembly impossible, and at the same time making the installation more secure, thus improving the ease of replacement of a composite cutting edge deep hole milling cutter.

[0015] 2. The reinforcement component of this application can strengthen the connection between the cutter body and the cutter head, making the cutter head installation more secure, increasing the stability of the cutter head installation, and making it more stable during use, thereby improving the practicality of a composite cutting edge deep hole end mill. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a structural schematic diagram of the front view and cross-section of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the present invention, shown in a top view cross-section.

[0019] Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0020] The following are the labeling elements in the diagram: 1. Tool holder; 2. Tool body; 3. Tool tip; 4. Connecting assembly; 41. Irregular groove; 42. Irregular connecting block; 5. Threaded groove; 6. Expansion bolt; 7. Storage groove; 8. Base clamping groove; 9. Cutting edge; 10. Chip discharge groove; 11. Reinforcing assembly; 111. Reinforcing groove; 112. Spring; 113. T-block; 114. Reinforcing block; 115. T-slot; 12. Chip discharge groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0022] Example: Figure 1 - Figure 4 As shown, this utility model provides a composite cutting edge deep hole milling cutter, including a tool holder 1, a tool body 2 movably connected to the top of the tool holder 1, a tool head 3 movably connected to the top of the tool body 2, and a connecting component 4 provided between the tool head 3 and the tool holder 1.

[0023] The connecting component 4 has a threaded groove 5 inside, and the tool holder 1 has an expansion bolt 6 that moves through it. The expansion bolt 6 expands the sleeve or wedge-shaped component by the axial tension generated when the nut is tightened, forming a tight frictional grip with the hole wall. The expansion bolt 6 extends into the inside of the threaded groove 5.

[0024] The expansion bolt 6 is inserted through the inside of the tool holder 1 and extends into the inside of the threaded groove 5. The axial tension generated when the nut is tightened causes the sleeve or wedge-shaped component to expand and form a tight frictional grip with the hole wall, thus fixing the tool holder 1, the tool body 2 and the tool head 3 together.

[0025] Please see Figure 1 , Figure 2 and Figure 3 The bottom of the handle 1 is provided with a storage groove 7, and the outer end of the handle 1 is provided with multiple base clamping grooves 8. Multiple cutting edges 9 are fixedly installed on the top of the head 3. Multiple chip-dispersing grooves 10 are provided on the outer ends of both the body 2 and the head 3. A reinforcing component 11 is provided between the body 2 and the head 3. A chip removal groove 12 is provided on the outer end of the body 2 and on one side of the chip-dispersing groove 10.

[0026] Chip groove 10 controls chip formation and discharge, preventing excessively long chips from affecting the cutting performance of the milling cutter. Chip removal groove 12 helps to remove chips and reduces friction and heat accumulation during the cutting process.

[0027] Please see Figure 1 and Figure 3 The connecting component 4 includes an irregular groove 41, which is opened inside the cutter body 2. An irregular connecting block 42 is movably connected inside the irregular groove 41. The irregular connecting block 42 is fixedly connected to the cutter head 3. A threaded groove 5 is opened inside the irregular connecting block 42.

[0028] The irregular connecting block 42 is inserted into the irregular groove 41, and the cutter head 3 is placed on top of the cutter body 2.

[0029] Please see Figure 1 , Figure 3 and Figure 4 The reinforcement component 11 includes a reinforcement groove 111. Multiple reinforcement grooves 111 are formed on the top of the blade body 2. Multiple springs 112 are symmetrically fixedly installed inside the reinforcement grooves 111. A T-shaped block 113 is fixedly installed on one side of every two springs 112. A reinforcement block 114 is movably connected between every two T-shaped blocks 113. A T-shaped groove 115 is symmetrically formed on the outer end of each reinforcement block 114. The T-shaped groove 115 and the T-shaped block 113 are movably connected.

[0030] The reinforcing block 114 at the bottom of the cutter head 3 is inserted into the reinforcing groove 111 above the cutter body 2. The reinforcing block 114 is pressed down, and the reinforcing block 114 presses down on the T-shaped block 113, pressing the reinforcing block 114 into the grooves on both sides of the reinforcing groove 111. When the T-shaped block 113 and the T-shaped groove 115 overlap, the T-shaped block 113 is pressed down by the elasticity of the spring 112, pressing the T-shaped block 113 into the T-shaped groove 115, thus reinforcing the connection of the cutter head 3.

[0031] Working principle: The operator inserts the irregular connecting block 42 into the irregular groove 41. The cutter head 3 is placed above the cutter body 2. The reinforcing block 114 at the bottom of the cutter head 3 is inserted into the reinforcing groove 111 above the cutter body 2. The reinforcing block 114 is pressed down, pressing the T-shaped block 113 into the grooves on both sides of the reinforcing groove 111. When the T-shaped block 113 and the T-shaped groove 115 overlap, the T-shaped block 113 is pressed down by the elasticity of the spring 112, pressing the T-shaped block 113 into the T-shaped groove 115. The cutting head 3 is fastened, and then the expansion bolt 6 is passed through the inside of the tool holder 1 and extends into the inside of the threaded groove 5. The axial tension generated when the nut is tightened causes the sleeve or wedge to expand and form a tight frictional grip with the hole wall, thus fixing the tool holder 1, the tool body 2 and the cutting head 3 together. The user fixes the tool on the machine tool through the base clamping groove 8. During the cutting process, the chip removal groove 12 and the chip separating groove 10 cooperate with each other to quickly remove chips, prevent chips from accumulating in the cutting area, and ensure the smoothness of the cutting process and the durability of the tool.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A complex deep hole milling cutter, characterized by: The utility model relates to a cutting tool, including handle (1), the top of handle (1) is connected with cutter body (2) swingingly, the top of cutter body (2) is connected with cutter head (3) swingingly, be provided with connecting assembly (4) between cutter head (3) and handle (1); The inside of connecting assembly (4) is opened with thread groove (5), the inside of handle (1) is swingingly penetrated with expansion bolt (6), expansion bolt (6) extends to the inside of thread groove (5).

2. The compound deep hole milling cutter according to claim 1, characterized in that: The bottom of handle (1) is opened with storage groove (7), the outside end of handle (1) is opened with a plurality of base clamping grooves (8), the top of cutter head (3) is fixedly installed with a plurality of cutting edges (9).

3. The compound deep hole milling cutter according to claim 1, characterized in that: The outside end of cutter body (2) and cutter head (3) is opened with a plurality of chip separation grooves (10), is provided with reinforcing assembly (11) between cutter body (2) and cutter head (3), the outside end of cutter body (2) and located one side of chip separation groove (10) is opened with chip removal groove (12).

4. The compound deep hole milling cutter according to claim 1, characterized in that: Connecting assembly (4) includes irregular groove (41), the inside of cutter body (2) is opened with irregular groove (41), the inside of irregular groove (41) is swingingly connected with irregular connecting block (42), irregular connecting block (42) is fixedly connected with cutter head (3), the inside of thread groove (5) is opened in irregular connecting block (42).

5. The compound deep hole milling cutter according to claim 3, characterized in that: Reinforcing assembly (11) includes reinforcing groove (111), a plurality of reinforcing groove (111) are opened in the top of cutter body (2), a plurality of springs (112) are fixedly installed in the inside of reinforcing groove (111) symmetrically, every two spring (112) one side is fixedly installed with T-shaped block (113).

6. The compound deep hole milling cutter according to claim 5, characterized in that: Every two T-shaped block (113) swingingly connected with reinforcing block (114), and the outside end of every reinforcing block (114) is opened with T-shaped groove (115) symmetrically, T-shaped groove (115) and T-shaped block (113) swingingly connected.

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