A stepped compound milling cutter

Abstract

The utility model relates to the field of milling cutter discloses a step compound milling cutter, including milling cutter body, the milling cutter body includes cutter body, the inside of cutter body is provided with handle part interface, the side surface fixed connection of cutter body has the tool bit, the inside screw thread connection of tool bit has blade, the inside of tool bit is provided with anti -clogging device, the anti -clogging device includes limit slot, the inside sliding connection of limit slot has baffle, the side surface fixed connection of baffle has sliding plate. In the utility model, when the milling cutter body carries out cutting work, first it is connected in the external output end through handle part interface, carries out cutting work to work piece after fixing blade in tool bit, if there is iron filings to remain in the gap groove of blade in cutting work, when unloading blade, make third connecting plate drive baffle to slide to the outside of limit slot, thereby reach the effect that baffle extends and removes the iron filings and other impurities in gap to facilitate cleaning.

Description

Technical Field

[0001] This utility model relates to the field of milling cutters, and in particular to a stepped composite milling cutter. Background Technology

[0002] A step milling cutter is a rotating cutting tool with one or more cutting teeth used for milling. During operation, each cutting tooth sequentially and intermittently removes the excess material from the workpiece. Milling cutters are mainly used for machining steps, grooves, shaped surfaces, and cutting off workpieces. In a broad sense, cutting tools include both cutting tools and grinding wheels; furthermore, "CNC cutting tools" include not only cutting inserts but also accessories such as tool holders and tool shanks.

[0003] The stepped composite milling cutter is a high-efficiency tool that integrates multiple cutting functions. Its core function is to simultaneously complete the machining of multiple composite structures such as stepped surfaces, end faces, outer circles, and grooves (such as the stepped structure of "large diameter section + small diameter section" on a part) during a single workpiece clamping process. It eliminates the need for frequent replacement of single-function tools and is widely used in precision machining fields such as automotive, aerospace, and mold manufacturing.

[0004] The existing stepped composite milling cutter's chip grooves need to be adapted to the cutting amounts of different steps (e.g., the cutting amount of a large-diameter step is much greater than that of a small-diameter step). Existing designs mostly use "equal depth, equal helix angle" chip grooves, resulting in redundant chip groove space in the small-diameter section and insufficient chip groove space in the large-diameter section. Chips accumulate in the gap between the large-diameter step and the workpiece, and chips are easily wrapped in the thread groove gaps of the insert, making them difficult to clean. Therefore, a stepped composite milling cutter is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a stepped composite milling cutter, which aims to improve the existing technology where the chip groove of the stepped composite milling cutter needs to be adapted to the cutting amount of different steps (such as the cutting amount of a large-diameter step is much greater than that of a small-diameter step). Existing designs mostly use "equal depth and equal helix angle" chip grooves, which leads to redundant chip groove space in the small-diameter section and insufficient chip groove space in the large-diameter section. This results in chips accumulating in the gap between the large-diameter step and the workpiece, and the chips easily getting entangled in the thread groove gap of the insert, making them difficult to clean.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a stepped composite milling cutter, comprising a milling cutter body, the milling cutter body including a cutter body, the cutter body having a shank interface inside, a cutter head fixedly connected to the side of the cutter body, a cutting blade threadedly connected to the inside of the cutter head, and an anti-clogging device provided inside the cutter head; the anti-clogging device includes a limiting groove, a baffle slidably connected inside the limiting groove, a slide plate fixedly connected to the side of the baffle, a first fixing block fixedly connected to the side of the slide plate away from the baffle, a first connecting plate rotatably connected to the side of the first fixing block away from the baffle, a second connecting plate rotatably connected to the side of the first fixing block away from the baffle, a slider rotatably connected to the side of the second connecting plate, a third connecting plate rotatably connected to the side of the slider away from the second connecting plate, and a protective device provided inside the cutter body.

[0007] As a further description of the above technical solution: the protective device includes a buffer shell, an airbag is fixedly connected inside the buffer shell, a connecting frame is fixedly connected inside the buffer shell, a support plate is fixedly connected inside the connecting frame, and a fixing screw is threadedly connected inside the connecting frame.

[0008] As a further description of the above technical solution: the connecting frame has a threaded groove inside, and the size of the threaded groove inside the connecting frame matches that of the fixing screw.

[0009] As a further description of the above technical solution: the baffle has a rotating groove inside, and the rotating groove inside the baffle matches the size of the third connecting plate.

[0010] As a further description of the above technical solution: the first fixing block has a rotating groove inside, and the rotating groove inside the first fixing block matches the size of the first connecting plate.

[0011] As a further description of the above technical solution: a rotating groove is provided on one side of the slider, and the rotating groove on one side of the slider matches the size of the second connecting plate.

[0012] As a further description of the above technical solution: a rotating groove is provided on the other side of the slider, and the rotating groove on the other side of the slider is matched with the size of the third connecting plate.

[0013] As a further description of the above technical solution: the connecting frame has two support plates fixedly connected inside, and the two support plates are arc-shaped as a whole.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, before the milling cutter body performs cutting work, it is first connected to the external output end through the shank interface. After fixing the blade to the cutter head, the workpiece is cut. If iron filings remain in the groove of the blade during the cutting process, when the blade is removed, the third connecting plate drives the baffle to slide to the outside of the limiting groove, thereby achieving the effect of extending the baffle to remove the iron filings and other impurities in the gap for easy cleaning.

[0016] 2. In this utility model, when the milling cutter body is cutting iron workpieces, the design of the air bladder inside the buffer shell will greatly reduce the vibration force, and protect the connection between the cutter body and the cutter head to the maximum extent so that it is difficult to break due to the violent vibration of cutting. In addition, the design of the internal support plate of the connecting frame will also reduce some of the force, so as to prevent it from loosening and breaking due to vibration. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of a stepped composite milling cutter proposed in this utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the overall three-dimensional part of a stepped composite milling cutter proposed in this utility model;

[0019] Figure 3 This is a side cross-sectional view of a stepped composite milling cutter proposed in this utility model;

[0020] Figure 4 This is a side sectional view of a stepped composite milling cutter proposed in this utility model.

[0021] Legend:

[0022] 1. Milling cutter body; 2. Cutter body; 3. Shank interface; 4. Cutter head; 5. Insert; 6. Anti-clogging device; 61. Limiting groove; 62. Baffle; 63. Slide plate; 64. First fixing block; 65. First connecting plate; 66. Second connecting plate; 67. Slider; 68. Third connecting plate; 7. Protective device; 71. Buffer shell; 72. Airbag; 73. Connecting frame; 74. Support plate; 75. Fixing screw. Detailed Implementation

[0023] 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.

[0024] Reference Figure 1 - Figure 2 This utility model provides an embodiment of a stepped composite milling cutter, comprising a milling cutter body 1, a cutter body 2, a shank interface 3 inside the cutter body 2, a cutter head 4 fixedly connected to the side of the cutter body 2, a cutting blade 5 threadedly connected to the inside of the cutter head 4, and an anti-clogging device 6 inside the cutter head 4; multiple sets of anti-clogging devices 6 are provided, all located at positions corresponding to the cutting blade 5 on the cutter head 4, and each anti-clogging device 6 includes a limiting groove 61, a baffle 62 slidably connected inside the limiting groove 61, a sliding plate 63 fixedly connected to the side of the baffle 62, the sliding plate 63 being designed as a multi-layered, extendable plate, a first fixing block 64 fixedly connected to the side of the sliding plate 63 away from the baffle 62, a first connecting plate 65 rotatably connected to the side of the first fixing block 64, a rotating groove inside the first fixing block 64 matching the size of the first connecting plate 65, this design allowing the first connecting plate 65 to be fixedly connected to the first fixing block 64. The side of the fixed block 64 rotates. The side of the first fixed block 64 away from the baffle 62 is rotatably connected to the second connecting plate 66. The side of the second connecting plate 66 is rotatably connected to the slider 67. A rotating groove is opened on one side of the slider 67, and the size of the rotating groove on the inside of the slider 67 matches the size of the second connecting plate 66. This design allows the second connecting plate 66 to rotate on the side of the slider 67. The side of the slider 67 away from the second connecting plate 66 is rotatably connected to the third connecting plate 68. A rotating groove is opened on the other side of the slider 67, and the size of the rotating groove on the other side of the slider 67 matches the size of the third connecting plate 68. This design allows the slider 67 to slide by pressing the third connecting plate 68 on the other side. A rotating groove is opened inside the baffle 62, and the size of the rotating groove inside the baffle 62 matches the size of the third connecting plate 68. This design allows the third connecting plate 68 to rotate on the side of the baffle 62. A protective device 7 is provided inside the blade body 2.

[0025] Reference Figure 3 - Figure 4 The protective device 7 includes a buffer housing 71, an airbag 72 fixedly connected inside the buffer housing 71, a connecting frame 73 fixedly connected inside the buffer housing 71, and a support plate 74 fixedly connected inside the connecting frame 73. There are two support plates 74 fixedly connected inside the connecting frame 73, and the two support plates 74 are arc-shaped. The arc-shaped support plate 74 design makes its overall vibration resistance better. A fixing screw 75 is threadedly connected inside the connecting frame 73. The connecting frame 73 has a threaded groove, and the size of the threaded groove inside the connecting frame 73 matches that of the fixing screw 75. This design allows the buffer housing 71 to be threadedly fixed by the fixing screw 75.

[0026] Working principle: Before the milling cutter body 1 performs cutting work, it is first connected to the external output end through the shank interface 3, and the cutting blade 5 is fixed inside the cutter head 4 through a threaded connection. When the cutting blade 5 is threaded, it will squeeze the baffle 62. The arc-shaped design of the baffle 62 will cause it to slide into the cutter head 4. After the cutting blade 5 is fixed to the cutter head 4, the workpiece is cut. If iron filings remain in the groove of the cutting blade 5 during the cutting process, when the cutting blade 5 is removed, the lifting of the cutting blade 5 will drive the first connecting plate 65 to slide and drive the first fixing block 64 to slide inside the limiting groove 61. The sliding of the first fixing block 64 will cause the second connecting plate 66 to start rotating and drive the slider 67 to slide inside the limiting groove 61. The sliding of the slider 67 will squeeze the third connecting plate 68 on the other side, causing the third connecting plate 68 to drive the baffle 62 to slide outward of the limiting groove 61, thereby achieving the effect of extending the baffle 62 to remove iron filings and other impurities in the gap for easy cleaning.

[0027] When the milling cutter body 1 is cutting a workpiece, the cutting of the workpiece by the blade 5 generates a huge vibration force that is transmitted to the inside of the cutter body 2. The long-term intense cutting vibration greatly affects the service life of the cutter body 2 and makes it prone to breakage and tool breakage. The buffer shell 71, which is threadedly fixed to the cutter body 2 by the fixing screw 75, supports the outside of the cutter body 2. The vibration force is transmitted to the inside of the buffer shell 71. The design of the air bladder 72 inside the buffer shell 71 greatly distributes and reduces the vibration force, and protects the connection between the cutter body 2 and the cutter head 4 to the greatest extent, making it difficult to break due to the intense cutting vibration. In addition, the design of the internal support plate 74 of the connecting frame 73 also reduces some of the force and protects the fixing screw 75 inside the connecting frame 73, preventing it from loosening and breaking due to vibration.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stepped composite milling cutter comprising a cutter body (1) characterised in that: The milling cutter body (1) includes a cutter body (2), a shank interface (3) is provided inside the cutter body (2), a cutter head (4) is fixedly connected to the side of the cutter body (2), a cutting blade (5) is threaded inside the cutter head (4), and an anti-clogging device (6) is provided inside the cutter head (4). The anti-blocking device (6) includes a limiting groove (61), a baffle (62) is slidably connected inside the limiting groove (61), a sliding plate (63) is fixedly connected to the side of the baffle (62), a first fixing block (64) is fixedly connected to the side of the sliding plate (63) away from the baffle (62), a first connecting plate (65) is rotatably connected to the side of the first fixing block (64) away from the baffle (62), a second connecting plate (66) is rotatably connected to the side of the first fixing block (64) away from the baffle (62), a slider (67) is rotatably connected to the side of the second connecting plate (66), and a third connecting plate (68) is rotatably connected to the side of the slider (67) away from the second connecting plate (66). A protective device (7) is provided inside the blade body (2).

2. The stepped composite cutter according to claim 1, wherein: The protective device (7) includes a buffer shell (71), an airbag (72) is fixedly connected inside the buffer shell (71), a connecting frame (73) is fixedly connected inside the buffer shell (71), a support piece (74) is fixedly connected inside the connecting frame (73), and a fixing screw (75) is threadedly connected inside the connecting frame (73).

3. The stepped composite cutter according to claim 2, wherein: The connecting frame (73) has a threaded groove inside, and the threaded groove inside the connecting frame (73) matches the size of the fixing screw (75).

4. The stepped composite cutter of claim 1 wherein: The baffle (62) has a rotating groove inside, and the rotating groove inside the baffle (62) matches the size of the third connecting plate (68).

5. The stepped composite cutter of claim 1 wherein: The first fixing block (64) has a rotating groove inside, and the rotating groove inside the first fixing block (64) matches the size of the first connecting plate (65).

6. The stepped composite cutter of claim 1 wherein: A rotating groove is provided on one side of the slider (67), and the rotating groove on one side of the slider (67) matches the size of the second connecting plate (66).

7. The stepped composite cutter of claim 1 wherein: A rotating groove is provided on the other side of the interior of the slider (67), and the rotating groove on the other side of the interior of the slider (67) matches the size of the third connecting plate (68).

8. The stepped composite cutter of claim 2 wherein: The connecting frame (73) has two fixedly connected support pieces (74) inside, and the two support pieces (74) are arc-shaped as a whole.

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