Numerical control milling cutter easy to replace

Abstract

The utility model belongs to the technical field of milling cutters, in particular to a numerical control milling cutter easy to replace, which comprises a cutter holder and a cutter head detachably assembled on the cutter holder, the cutter holder comprises a body with a mounting hole on one side, and the cutter head comprises a connecting handle adaptive to the mounting hole and a cutter body coaxially fixed on one side of the connecting handle. Lug plates are fixedly connected to the two sides of the connecting handle, and fixing blocks are arranged at the ends of the lug plates. The lug plates are arranged on the two sides of the connecting handle, the fixing blocks are arranged at the ends of the lug plates, when the tool bit is assembled, the connecting handle extends into the mounting hole of the tool apron, the fixing blocks can make contact with the diagonal planes of the wedge-shaped blocks in the assembling process, the wedge-shaped blocks are driven to enter the positioning holes of the fixing blocks, and therefore the tool bit is assembled. And during dismounting, the protective cap is shifted, so that the telescopic rod is moved, convenience and rapidness are achieved, and the problem that a milling cutter is inconvenient to replace in a device at the present stage is solved.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, specifically to an easily replaceable CNC milling cutter. Background Technology

[0002] CNC milling cutters are rotating cutting tools with one or more cutting teeth used for milling operations. During operation, each cutting tooth sequentially and intermittently removes the excess material from the workpiece. Milling cutters are mainly used for machining processes such as steps, grooves, shaped surfaces, and cutting off workpieces. Milling cutters are used for machining and shaping workpieces, and they experience significant wear during use, thus requiring replacement. However, currently, milling cutter heads are generally fixed to the tool holder or tool handle by bolts or threads. This assembly method is not ideal in terms of convenience, is difficult to operate, and is inconvenient for assembling and replacing milling cutters. Furthermore, the accuracy of this assembly method is difficult to control, and the cutter is prone to wobbling after assembly, exhibiting certain defects and shortcomings, thus requiring improvement. Utility Model Content

[0003] (1) Technical problems solved

[0004] To address the shortcomings of existing technologies, this utility model provides an easily replaceable CNC milling cutter. By setting ear plates on both sides of the connecting shank and fixing blocks at the ends of the ear plates, the connecting shank is extended into the mounting hole of the cutter holder during cutter head assembly. During assembly, the fixing block contacts the oblique cut surface of the wedge block, driving the wedge block into the positioning hole of the fixing block, thus achieving automatic assembly and positioning of the cutter head. For removal, simply move the telescopic rod by turning the protective cap. This is convenient and solves the problem of inconvenient cutter replacement in current devices.

[0005] (2) Technical solution

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] A replaceable CNC milling cutter includes a tool holder and a detachable cutter head assembled on the tool holder. The tool holder includes a body with a mounting hole on one side. The cutter head includes a connecting shank adapted to the mounting hole and a cutter body coaxially fixed to one side of the connecting shank. Both sides of the connecting shank are fixedly connected to ear plates. The end of the ear plate is provided with a fixing block, and the fixing block has a positioning hole. The cutter also includes a quick positioning mechanism, of which two are provided. The two quick positioning mechanisms are symmetrically fixed on the tool holder. Each quick positioning mechanism includes a base fixedly connected to one side of the tool holder and a telescopic rod slidably connected to the base. One end of the telescopic rod is fixedly connected to a wedge block, which is adapted to the positioning hole.

[0008] Furthermore, both the top of the fixing block and the bottom of the wedge block are provided with beveled surfaces.

[0009] Furthermore, the main body has two symmetrically distributed relief cavities, and the ear plate is adapted to the relief cavities.

[0010] Furthermore, a connecting seat is fixedly connected to the telescopic rod, and a spring is sleeved on the telescopic rod, with the two ends of the spring fixedly connected to the base and the connecting seat, respectively.

[0011] Furthermore, a protective cap is fixedly connected to the end of the telescopic rod away from the wedge block, and one side of the protective cap abuts against the base.

[0012] Furthermore, the telescopic rod is a rectangular rod.

[0013] (3) Beneficial effects

[0014] Compared with the prior art, this utility model provides an easily replaceable CNC milling cutter, which has the following beneficial effects:

[0015] 1. This utility model features ear plates on both sides of the connecting handle, with a fixing block at the end of each ear plate. The fixing block has a positioning hole. During assembly, the connecting handle closes into the mounting hole of the tool holder, and the ear plates slide along the clearance groove. During assembly, the beveled surface of the fixing block contacts the beveled surface of the wedge block, causing the wedge block and telescopic rod to retract. At this time, the spring is compressed. When the connecting handle is fully closed into the mounting hole of the tool holder, the positioning hole on the fixing block corresponds to the wedge block. Then, the wedge block closes into the positioning hole of the fixing block under the action of the spring, achieving quick assembly and fixing of the tool head. When the tool head needs to be removed, the protective cap is manually moved to make the wedge block leave the positioning hole. This is very simple and achieves the purpose of facilitating tool head assembly and disassembly, making tool head replacement convenient.

[0016] 2. In this utility model, a protective cap is provided at the end of the telescopic rod. The protective cap can act as a stop and limit the telescopic position of the wedge block, thereby better positioning the cutter head. Attached Figure Description

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a three-dimensional cross-sectional view of the tool holder in this utility model;

[0019] Figure 3 This is a schematic diagram of the cutter head in this utility model;

[0020] Figure 4 This is a schematic diagram of the rapid positioning mechanism in this utility model.

[0021] In the diagram: 1. Tool holder; 101. Body; 102. Clearance cavity; 103. Mounting hole; 2. Tool head; 201. Connecting handle; 202. Tool body; 203. Fixing block; 204. Positioning hole; 205. Ear plate; 3. Quick positioning mechanism; 301. Base; 302. Telescopic rod; 303. Connecting seat; 304. Wedge block; 305. Beveled surface; 306. Spring; 307. Protective cap. Detailed Implementation

[0022] 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.

[0023] Example

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an embodiment of this utility model proposes an easily replaceable CNC milling cutter, including a tool holder 1 and a cutter head 2 detachably assembled on the tool holder 1. The tool holder 1 includes a body 101 with a mounting hole 103 on one side. The cutter head 2 includes a connecting shank 201 adapted to the mounting hole 103 and a cutter body 202 coaxially fixed to one side of the connecting shank 201. Ear plates 205 are fixedly connected to both sides of the connecting shank 201. A fixing block 203 is provided at the end of the ear plate 205, and a positioning hole 204 is provided on the fixing block 203. It also includes a quick positioning mechanism 3. There are two quick positioning mechanisms 3, which are symmetrically fixed on the tool holder 1. The quick positioning mechanism 3 includes a base 301 fixedly connected to one side of the tool holder 1 and a telescopic rod 302 slidably connected to the base 301. A wedge block 304 is fixedly connected to one end of the telescopic rod 302, and the wedge block 304 is adapted to the positioning hole 204.

[0025] It should be noted that the tool holder 1 is used for the installation and fixation of the tool head 2. An installation hole 103 is provided on one side of the main body 101 for the assembly of the connecting handle 201. Ear plates 205 are provided on both sides of the connecting handle 201 for the connection and fixation of the fixing block 203. A positioning hole 204 is provided on the fixing block 203 for the stop positioning of the fixing block 203, thereby realizing the positioning and installation of the tool head 2. When the tool head 2 is assembled, the connecting handle 201 slides along the installation hole 103 of the tool holder 1. When the top of the fixing block 203 contacts the wedge block 304, it can drive the wedge block 304 and the telescopic rod 302 to retract. When the positioning hole 204 is aligned with the wedge block 304, it can make the wedge block 304 close into the positioning hole 204 of the fixing block 203, thereby realizing the locking and positioning of the fixing block 203, thus realizing the quick installation of the tool head 2.

[0026] like Figure 3 and Figure 4 As shown, in some embodiments, the top of the fixing block 203 and the bottom of the wedge block 304 are both provided with a chamfered surface 305.

[0027] It should be noted that by setting the oblique surface 305 on the fixed block 203 and the wedge block 304, when the fixed block 203 moves upward, the oblique surface 305 on its top can contact the oblique surface 305 on the wedge block 304, thereby driving the wedge block 304 and the telescopic rod 302 to retract and move, ensuring the stable extension and retraction of the wedge block 304.

[0028] like Figure 2 and Figure 3 As shown, in some embodiments, the body 101 has two symmetrically distributed relief cavities 102, and the ear plate 205 is adapted to the relief cavities 102.

[0029] It should be noted that the setting of the relief cavity 102 enables the ear plate 205 to extend and retract, thereby achieving stable upward movement of the connecting handle 201 and the ear plate 205.

[0030] like Figure 4 As shown, in some embodiments, a connecting seat 303 is fixedly connected to the telescopic rod 302, and a spring 306 is sleeved on the telescopic rod 302. The two ends of the spring 306 are fixedly connected to the base 301 and the connecting seat 303, respectively.

[0031] It should be noted that the spring 306 enables the telescopic rod 302 and the wedge block 304 to automatically reset. When the position of the positioning hole 204 is aligned with the wedge block 304, the telescopic rod 302 and the wedge block 304 can move under the action of the spring 306, so that the wedge block 304 closes at the positioning hole 204 of the fixing block 203, thereby achieving the stop positioning of the fixing block 203.

[0032] like Figure 4 As shown, in some embodiments, a protective cap 307 is fixedly connected to the end of the telescopic rod 302 away from the wedge block 304, and one side of the protective cap 307 abuts against the base 301.

[0033] It should be noted that the protective cap 307 can, on the one hand, realize the stopping and limiting function of the wedge block 304, so that the wedge block 304 stays in a specific position, and on the other hand, realize the stretching and moving of the telescopic rod 302, thereby realizing the removal of the cutter head 2.

[0034] like Figure 4 As shown, in some embodiments, the telescopic rod 302 is a rectangular rod.

[0035] It should be noted that the telescopic rod 302 has a rectangular structure and serves as a limit, enabling the telescopic rod 302 and the wedge block 304 to extend and retract stably without rotating during extension and retraction.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A replaceable CNC milling cutter, comprising a tool holder (1) and a detachable cutter head (2) assembled on the tool holder (1), characterized in that: The blade holder (1) includes a body (101) with a mounting hole (103) on one side, and a blade head (2) including a connecting handle (201) adapted to the mounting hole (103) and a blade body (202) coaxially fixed to one side of the connecting handle (201). Ear plates (205) are fixedly connected to both sides of the connecting handle (201). A fixing block (203) is provided at the end of the ear plate (205), and a positioning hole (204) is provided on the fixing block (203). The blade head (202) also includes: Two quick positioning mechanisms (3) are provided, and the two quick positioning mechanisms (3) are symmetrically fixed on the tool holder (1). The quick positioning mechanism (3) includes a base (301) fixedly connected to one side of the tool holder (1) and a telescopic rod (302) slidably connected to the base (301). One end of the telescopic rod (302) is fixedly connected to a wedge block (304), and the wedge block (304) is adapted to the positioning hole (204).

2. The easily replaceable CNC milling cutter according to claim 1, characterized in that: The top of the fixed block (203) and the bottom of the wedge block (304) are both provided with oblique cut surfaces (305).

3. The easily replaceable CNC milling cutter according to claim 1, characterized in that: The main body (101) has two symmetrically distributed relief cavities (102), and the ear plate (205) is adapted to the relief cavity (102).

4. The easily replaceable CNC milling cutter according to claim 1, characterized in that: A connecting seat (303) is fixedly connected to the telescopic rod (302), and a spring (306) is sleeved on the telescopic rod (302). The two ends of the spring (306) are fixedly connected to the base (301) and the connecting seat (303) respectively.

5. The easily replaceable CNC milling cutter according to claim 1, characterized in that: The end of the telescopic rod (302) away from the wedge block (304) is fixedly connected to a protective cap (307), and one side of the protective cap (307) abuts against the base (301).

6. The easily replaceable CNC milling cutter according to claim 1, characterized in that: The telescopic rod (302) is a rectangular rod.

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