Turn-milling cutter

Abstract

The utility model discloses a turn-milling cutter, which relates to the technical field of numerical control machining, and comprises a cutter bar and a cutter head, the top end of the cutter bar is provided with a clamping bulge, the bottom end of the cutter head is provided with a clamping seat matched with the clamping bulge, and the clamping bulge is connected with the clamping seat in a sliding fit manner and is fixedly connected with the clamping seat through a plurality of fastening screws. According to the turning and milling tool, the clamping protrusion and the clamping base are additionally arranged to assemble the tool bar and the tool bit, the force borne by the tool bit in the machining process is effectively dispersed, and the fastening screw does not bear main cutting force any more. By means of the design, the risk that the fastening screw is broken is remarkably reduced, the situation that the tool bit is separated from the tool bar due to the fact that the fastening screw is broken is greatly reduced, the stability and reliability of the tool bit in the machining process are guaranteed, and the overall machining efficiency and safety are improved.

Description

Technical Field

[0001] This utility model relates to the field of CNC machining technology, specifically a milling and turning tool. Background Technology

[0002] In the field of CNC machining, milling cutters are key cutting tools, and their structural stability and durability directly affect machining efficiency and product quality. Traditional milling cutters mainly consist of a tool holder and a cutter head. The tool holder serves as a support and transmission component, while the cutter head is responsible for the actual cutting work. In existing technology, the tool holder usually has a pre-drilled threaded hole, and the mounting end of the cutter head has a corresponding insertion hole. The assembly between the two mainly relies on fastening screws.

[0003] However, this single assembly structure has significant drawbacks. During machining, the cutting head needs to withstand enormous cutting forces from the workpiece, most of which are concentrated at the connection between the cutting head and the tool holder, i.e., where the fastening screw is located. Because the fastening screw needs to withstand both shearing and tensile / compressive forces simultaneously, it is highly susceptible to breakage under prolonged high-load operation. Once the screw breaks, the cutting head will detach from the tool holder, which will not only cause machining interruptions and affect production efficiency, but may also damage the machine tool and workpiece, increasing maintenance costs. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a milling and turning tool that solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a milling cutter, including a cutter shank and a cutter head, wherein the top end of the cutter shank is provided with a locking protrusion, and the bottom end of the cutter head is provided with a locking seat adapted to the locking protrusion, wherein the locking protrusion and the locking seat are slidably connected and fixedly connected by a plurality of fastening screws.

[0006] Furthermore, the locking protrusion is integrally connected to the top of the tool holder, including a first protrusion and a second protrusion. The top of the first protrusion is connected to the second protrusion, and the width of the second protrusion is greater than the width of the first protrusion.

[0007] Furthermore, the two sides of the first protrusion are configured as inclined structures extending toward the tool holder, and a second slot is symmetrically provided at the connection between the first protrusion and the second protrusion.

[0008] Furthermore, threaded holes are pre-drilled on both sides of the first protrusion, and the threaded holes are symmetrical about the diagonal of the first protrusion.

[0009] Furthermore, the card holder is integrally connected to the bottom end of the cutter head, and the inside of the card holder has interconnected card slots No. 3 and No. 4, with protrusion No. 3 integrally connected at the connection between card slots No. 3 and No. 4.

[0010] Furthermore, insertion holes are provided on both sides of the card holder, and the insertion holes correspond to the threaded holes.

[0011] Furthermore, a first slot is reserved at the top of the tool holder and on both sides of the slot protrusion, and the bottom of both sides of the card holder is integrally connected with a bottom protrusion that matches the first slot.

[0012] This utility model provides a milling and turning tool. Compared with the prior art, it has the following advantages:

[0013] This milling cutter, by adding a retaining protrusion and a retainer to assemble the tool holder and cutter head, effectively distributes the force on the cutter head during machining, so that the fastening screw no longer bears the main cutting force. This design significantly reduces the risk of fastening screw breakage, thereby greatly reducing the occurrence of the cutter head detaching from the tool holder due to fastening screw breakage, ensuring the stability and reliability of the cutter head during machining, and improving overall machining efficiency and safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the disassembled structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the tool holder and the locking protrusion in this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the cutter head and the holder in this utility model;

[0017] Figure 4 This is a schematic diagram of the assembly structure of this utility model.

[0018] In the diagram: 1. Tool holder; 11. No. 1 slot; 2. Tool head; 3. Locking protrusion; 31. No. 1 protrusion; 32. No. 2 protrusion; 33. No. 2 slot; 34. Threaded hole; 4. Locking seat; 41. Base protrusion; 42. No. 3 slot; 43. No. 4 slot; 44. No. 3 protrusion; 45. Insertion hole; 5. Fastening screw. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-4This utility model provides a technical solution: a milling cutter, including a cutter shank 1 and a cutter head 2. The cutter shank 1 and the cutter head 2 are connected and fixed by a retaining protrusion 3, a retainer 4, and a plurality of fastening screws 5. The retaining protrusion 3 is integrally connected to the top end of the cutter shank 1, and the retainer 4 is integrally connected to the bottom end of the cutter head 2. The retainer 4 is slidably fitted onto the outside of the retaining protrusion 3 by a plurality of engaging structures, and is finally connected and fixed by a plurality of fastening screws 5, as detailed below:

[0021] The top of the tool holder 1 and both sides of the locking protrusion 3 are reserved with a first slot 11. The bottom of both sides of the card holder 4 are integrally connected to the bottom foot protrusion 41. The first slot 11 and the bottom foot protrusion 41 are compatible.

[0022] The locking protrusion 3 includes a first protrusion 31 integrally connected to the top of the tool holder 1. The top of the first protrusion 31 is integrally connected to a second protrusion 32. The width of the second protrusion 32 is greater than the width of the first protrusion 31. The two sides of the first protrusion 31 are set as inclined structures extending towards the tool holder 1. A second locking groove 33 is symmetrically opened at the connection between the first protrusion 31 and the second protrusion 32. Threaded holes 34 are reserved on both sides of the first protrusion 31.

[0023] The card holder 4 has two interconnected card slots, No. 3 42 and No. 4 43. A No. 3 protrusion 44 is integrally connected at the connection between the No. 3 card slot 42 and the No. 4 card slot 43. Insertion holes 45 are reserved on both sides of the card holder 4.

[0024] After the positioning protrusion 3 and the card seat 4 are assembled, the bottom protrusion 41 engages inside the first card slot 11, the first protrusion 31 engages inside the third card slot 42, the second protrusion 32 engages inside the fourth card slot 43, and the third protrusion 44 engages inside the second card slot 33.

[0025] The threaded hole 34 and the insertion hole 45 are symmetrical about the diagonal on the first protrusion 31 and the card holder 4, and the threaded hole 34 corresponds to the insertion hole 45. The fastening screw 5 is inserted into the insertion hole 45 and is threadedly connected to the threaded hole 34.

[0026] During assembly, first slide the cutter head 2 and the clasp 4 together onto the outside of the clasp protrusion 3. After sliding, stop when the threaded hole 34 corresponds to the position of the insertion hole 45. At this time, the bottom protrusion 41 engages inside the first clasp groove 11, the first protrusion 31 engages inside the third clasp groove 42, the second protrusion 32 engages inside the fourth clasp groove 43, and the third protrusion 44 engages inside the second clasp groove 33. Finally, insert the fastening screw 5 into the insertion hole 45 and continue to tighten the fastening screw 5 until the threads between the fastening screw 5 and the threaded hole 34 are engaged. Tighten the fastening screw 5 to complete the assembly of the cutter head 2 onto the end of the cutter bar 1. When disassembly is required, the same operation can be performed.

[0027] It should be noted that, compared with the existing technology where the tool holder 1 and the tool head 2 are directly connected and fixed by fastening screws 5, the structure of assembling the tool holder 1 and the tool head 2 by adding additional locking protrusions 3 and locking seats 4 results in a structure where the force on the tool head 2 during workpiece machining is not concentrated on the fastening screws 5, but rather most of the force is exerted on the locking action of the locking protrusions 3 and locking seats 4. The force on the fastening screws 5 is very small in this structure, which means that the fastening screws 5 are less likely to break compared with the existing connection structure. During machining, the probability of the tool head 2 detaching from the tool holder 1 due to the breakage of the fastening screws 5 is greatly reduced, ensuring the stability of the tool head 2 during operation.

Claims

1. A milling cutter, comprising a tool holder (1) and a cutter head (2), characterized in that, The top of the cutter bar (1) is provided with a locking protrusion (3), and the bottom of the cutter head (2) is provided with a locking seat (4) that matches the locking protrusion (3). The locking protrusion (3) and the locking seat (4) are connected by sliding fit and fixedly connected by several fastening screws (5).

2. A milling and turning tool according to claim 1, characterized in that, The locking protrusion (3) is integrally connected to the top of the tool holder (1), including a first protrusion (31) and a second protrusion (32). The top of the first protrusion (31) is connected to the second protrusion (32), and the width of the second protrusion (32) is greater than the width of the first protrusion (31).

3. A milling and turning tool according to claim 2, characterized in that, The first protrusion (31) has two sides with inclined surfaces extending toward the tool holder (1), and a second slot (33) is symmetrically provided at the connection between the first protrusion (31) and the second protrusion (32).

4. A milling and turning tool according to claim 2 or 3, characterized in that, Both sides of the first protrusion (31) are provided with threaded holes (34), and the threaded holes (34) are symmetrical about the diagonal of the first protrusion (31).

5. A milling and turning tool according to claim 1, characterized in that, The card holder (4) is integrally connected to the bottom end of the cutter head (2). The card holder (4) has a connected card slot No. 3 (42) and card slot No. 4 (43) respectively. A protrusion No. 3 (44) is integrally connected at the connection between card slot No. 3 (42) and card slot No. 4 (43).

6. A milling and turning tool according to claim 5, characterized in that, The card holder (4) has pre-drilled holes (45) on both sides, and the holes (45) correspond to the threaded holes (34).

7. A milling and turning tool according to claim 1, characterized in that, The top of the tool holder (1) and both sides of the locking protrusion (3) are reserved with a first slot (11), and the bottom of both sides of the card seat (4) are integrally connected with a bottom protrusion (41) that matches the first slot (11).

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