Split type internal thread milling cutter with swing angle
By designing a split-type internal thread end mill with a built-in swing angle, the problem of insufficient machining accuracy of internal thread end mills was solved, realizing high-precision internal thread machining. It is suitable for ordinary milling and turning composite equipment and machining centers, and the cutter head is replaceable, reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-03-17
AI Technical Summary
Existing internal thread end mills cannot automatically adjust the swing angle during machining, resulting in the arcs on the left and right sides of the machined thread not matching the theoretical arcs, leading to insufficient precision.
Design a split-type internal thread milling cutter with a built-in tilting angle, including a cutter head and a cutter shank. Multiple milling sections are installed on the cutter head. Internal thread milling is performed by rotating the milling head inside the workpiece through the protrusions. The milling sections coincide with the cross-sectional contour of the workpiece, avoiding the need for separate adjustment of the tilting mechanism and reducing the use of drive sources and errors.
It improves the machining accuracy of the internal thread of the workpiece, reduces the use of the drive source, reduces errors, is suitable for ordinary milling and turning composite equipment and machining centers, and the tool head is replaceable, saving costs and improving machining efficiency and accuracy.
Smart Images
Figure CN223997401U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining technology, specifically a split-type internal thread milling cutter with a built-in swing angle. Background Technology
[0002] Internal thread usually refers to the helical groove structure machined inside a mechanical part. Milling cutters are typically used in the machining of internal thread. As is generally known, a milling cutter is a rotating cutting tool with one or more cutting teeth used for milling operations.
[0003] In existing technologies such as Figure 1-3 In Figure 2 In the process, when α equals 0, the cross section of the cutting head is consistent with the normal cross section of the workpiece. The machining helix angle can only be corrected by special equipment. When the angle is not corrected, the arcs on the left and right sides of the machined screw path are inconsistent with the theoretical arcs, which has certain shortcomings. Utility Model Content
[0004] The purpose of this invention is to provide a split-type internal thread end mill with a built-in swing angle to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a split-type internal thread milling cutter with a self-swinging angle, comprising a cutter head and a cutter shank, wherein the cutter head includes a base, and multiple milling portions are mounted on the base; the milling portions include protrusions mounted on the base, and milling heads are provided on the protrusions through their extension ends; milling grooves are provided on the milling heads.
[0006] Furthermore, a first bending groove is provided between the protrusion and the extension, and the milling head and the extension are connected through a second bending groove.
[0007] Furthermore, there are six milling sections arranged in a circumferential array on the base.
[0008] Furthermore, the cutter head and the cutter shank are movably connected.
[0009] Furthermore, a locking mechanism is provided between the cutter head and the cutter handle.
[0010] Furthermore, the locking mechanism includes a bolt slidably connected to the blade head, and the blade handle has a threaded groove, with the bolt threadedly connected to the threaded groove.
[0011] Furthermore, the cutter head is provided with a through groove, and the bolt is slidably connected to the through groove.
[0012] Furthermore, a positioning part is provided between the cutter head and the cutter shank to improve the stability of the cutter head during installation.
[0013] Furthermore, the positioning part includes multiple positioning keys fixedly connected to the cutter head, and the cutter handle has a positioning groove adapted to the positioning keys. When the cutter head is installed on the cutter handle, the positioning keys are engaged in the positioning groove.
[0014] Furthermore, the positioning key is in the shape of a boss.
[0015] Furthermore, multiple positioning keys are mounted in a circumferential array on the cutter head.
[0016] Furthermore, the multiple positioning keys are integrally formed with the cutter head.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: When the split-type internal thread milling cutter with built-in tilting angle is working, the power mechanism drives the cutter head to rotate, so that the protrusion drives the milling head to rotate inside the workpiece, so that the milling groove performs internal thread milling operation on the inside of the workpiece. During this process, when the milling part coincides with the cross-sectional contour of the workpiece, the central axis of the workpiece coincides with or is parallel to the central axis of the milling cutter in any view. There is no need to set up a separate alignment mechanism to adjust the position of the milling cutter, and the internal thread of the workpiece can meet the processing requirements. At this time, not only can the use of drive source be reduced, but also the error caused by the fit clearance between drive sources can be reduced, thus improving the processing accuracy of the workpiece.
[0018] Furthermore, the cutting tool of this utility model can be used on ordinary milling and turning composite equipment and ordinary machining centers, and the equipment selection is more extensive for machining the internal thread of nuts;
[0019] Furthermore, the cutting tool of this utility model adopts a split structure. When processing products with different helix angles or when the cutting head is damaged, only the cutting head needs to be replaced, without the need to replace the whole tool, thus saving tool costs.
[0020] Furthermore, the cutting head of this utility model adopts a six-flute design, which enhances the cutting performance during processing and correspondingly increases the machining accuracy and efficiency of the internal thread. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0022] Figure 1 This is a schematic diagram of the workpiece processing structure in the prior art;
[0023] Figure 2 for Figure 1 Schematic diagram of the structure in sectional view along the AA section;
[0024] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the middle BB line;
[0025] Figure 4 This is a schematic diagram of the workpiece processing state structure provided in an embodiment of the present utility model;
[0026] Figure 5 for Figure 4 Schematic diagram of the CC section structure along the middle;
[0027] Figure 6 for Figure 4 Schematic diagram of the DD section structure along the middle edge;
[0028] Figure 7 A schematic diagram of the overall structure provided for an embodiment of this utility model;
[0029] Figure 8 This is a schematic diagram of the positioning groove opening position structure provided in an embodiment of the present utility model;
[0030] Figure 9 A schematic diagram of the cutter head structure provided for an embodiment of this utility model;
[0031] Figure 10 This is a schematic diagram of the positioning structure of the positioning part provided in an embodiment of the present utility model.
[0032] Explanation of reference numerals in the attached drawings: 1. Tool holder; 2. Tool head; 21. Base; 22. Milling section; 221. Protrusion; 222. Extension; 223. Milling head; 224. Milling groove; 225. First bending groove; 226. Second bending groove; 3. Bolt; 4. Locating key; 5. Locating groove; 6. Threaded groove; 7. Through groove; 8. Workpiece; 9. Center axis of the milling cutter; 10. Center axis of the workpiece. Detailed Implementation
[0033] 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.
[0034] Please see Figures 1-10 This utility model provides a technical solution: a split internal thread end mill with a self-swinging angle, including a cutter head 2 and a cutter shank 1. The cutter head 2 includes a base 21, and multiple milling parts 22 are installed on the base 21. The milling part 22 includes a protrusion 221 installed on the base 21, and a milling head 223 is provided on the protrusion 221 through an extension end. A milling groove 224 is provided on the milling head 223.
[0035] Specifically, this split-type internal thread milling cutter with a built-in tilting angle includes a cutter head 2 and a cutter shank 1. The cutter head 2 includes a base 21, and multiple milling sections 22 are mounted on the base 21. Specifically, the milling sections 22 are adapted to the internal thread of the workpiece 8. (Reference) Figure 4-6 The milling part 22 abuts against the cross section of the inner thread of the workpiece 8. During the milling operation of the workpiece 8, there is no need for the power mechanism to actively align the position of the milling cutter. That is, when the cross-sectional shape of the milling cutter coincides with the cross-sectional outline of the workpiece 8, the central axis 10 of the workpiece coincides with or is parallel to the central axis 9 of the milling cutter in any view.
[0036] The milling section 22 includes a protrusion 221 mounted on the base 21. A milling head 223 is provided on the protrusion 221 via its extended end, and a milling groove 224 is formed on the milling head 223, which is adapted to the internal thread of the workpiece. In use, an external mechanism first drives the cutter head 2 to contact the inner wall of the workpiece 8, and an additional power mechanism drives the cutter head 2 to rotate. More specifically, the base 21 drives the protrusion 221 to rotate, so that the protrusion 221 drives the milling head 223 to rotate inside the workpiece 8, allowing the milling groove 224 to perform internal thread milling on the workpiece 8. During this process, when the milling section 22 coincides with the cross-sectional contour of the workpiece 8, the central axis of the workpiece 8 coincides with or is parallel to the central axis of the milling cutter in any view. There is no need to separately set up a leveling mechanism to adjust the position of the milling cutter, and the internal thread of the workpiece 8 can meet the machining requirements. This not only reduces the use of drive sources but also further reduces errors caused by the fit clearance between drive sources, improving the machining accuracy of the workpiece 8. It is hereby declared that the basic working principle of the cutter head 2 in this application is consistent with the basic principle of the cutter head in the prior art, such as controlling the feed of the cutter head 2, etc., which will not be elaborated here.
[0037] Preferably, the diameter of the tool holder 1 can be determined according to the actual size of the equipment clamp, and the material can be ordinary 45# steel or 40Cr quenched and tempered, with a hardness between HRC35-45. The material of the tool tip 2 can be determined according to the hardness of the workpiece 8 to be processed and the processing cost in the actual production process, and can be ordinary high-speed steel or cemented carbide with a coating.
[0038] In the embodiment provided by this utility model, a first bending groove 225 is provided between the protrusion 221 and the extension 222, and the milling head 223 is connected to the extension 222 through a second bending groove 226. The first bending groove 225 and the second bending groove 226 enable the cutting head 2 to fit and adapt to the workpiece 8 more closely, further meeting the work requirements.
[0039] In the embodiments provided by this utility model, there are six milling sections 22, resulting in a larger cutting volume per unit time and a more uniform distribution of cutting force, thus reducing vibration. More specifically, each milling section 22 bears a smaller cutting force, reducing wear on individual milling sections 22 and further improving the overall lifespan of the milling cutter. The sections are arranged in a circumferential array on the base 21 to ensure symmetrical radial cutting forces and prevent wobble or vibration of the cutter head 2. Simultaneously, the circumferential array distribution ensures balanced cutting forces, improves surface quality, and adapts to high-speed machining requirements.
[0040] In the embodiments provided by this utility model, the cutter head 2 and the cutter holder 1 are movably connected. When processing products with different helix angles or when the cutter head 2 is damaged, only the cutter head 2 needs to be replaced, without the need for overall replacement, thus saving tool costs.
[0041] In the embodiments provided by this utility model, a locking mechanism is provided between the cutter head 2 and the tool holder 1, which can improve the stability when the cutter head 2 and the tool holder 1 are connected, reduce the shaking during milling operations, and meet the work requirements.
[0042] In the embodiments provided by this utility model, the locking mechanism includes a bolt 3 that is slidably connected to the cutter head 2, and a threaded groove 6 is provided on the cutter handle 1. The bolt 3 is threadedly connected to the threaded groove 6, thereby improving the stability of the connection between the cutter head 2 and the cutter handle 1, and facilitating the replacement of the cutter head 2.
[0043] In the embodiments provided by this utility model, a through groove 7 is provided on the cutter head 2, and the bolt 3 is slidably connected to the through groove 7, which facilitates the installation and use of the cutter head 2.
[0044] In the embodiments provided by this utility model, a positioning part is also provided between the cutter head 2 and the tool holder 1 to improve the stability of the cutter head 2 during installation. The positioning part includes a plurality of positioning keys 4 fixedly connected to the cutter head 2. The tool holder 1 is provided with a positioning groove 5 that matches the positioning keys 4. When the cutter head 2 is installed on the tool holder 1, the positioning keys 4 are engaged in the positioning groove 5, thereby further improving the stability of the cutter head 2 during cutting operations and thus improving the milling quality.
[0045] In the embodiments provided by this utility model, the positioning key 4 is in the shape of a boss, and the positioning groove 5 is also in the shape of a boss. When the positioning key 4 is engaged in the positioning groove 5, it can greatly improve the stability of the cutter head 2 during installation, reduce the risk of the cutter head 2 falling off the cutter holder 1 when rotating at high speed, and further improve the milling quality of the workpiece 8 from the side, while also reducing the occurrence of safety hazards to a certain extent, with better results.
[0046] In the embodiments provided by this utility model, multiple positioning keys 4 are installed in a circumferential array on the cutter head 2. At this time, the multiple sets of positioning keys 4 can be evenly stressed, thereby effectively reducing the wear of a single positioning key 4 and greatly improving the service life of the positioning part, making it suitable for widespread use.
[0047] In the embodiments provided by this utility model, multiple positioning keys 4 are integrally formed with the cutter head 2, so the positioning keys 4 and the cutter head 2 are more stable, further reducing the risk of breakage between the positioning keys 4 and the cutter, and further improving the stability of the cutter head 2 during installation.
[0048] It should be noted that all electrical equipment involved in this application can be powered by batteries or external power sources.
[0049] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A split type inner channel milling cutter with swing angle, comprising a cutter head (2) and a cutter handle (1), characterized in that: the cutter head (2) comprises a base (21), and a plurality of milling parts (22) are installed on the base (21); the milling part (22) comprises a protrusion (221) installed on the base (21), and the protrusion (221) is provided with a milling head (223) through an extension part; a milling groove (224) is formed on the milling head (223).
2. The split inner channel cutter with swing angle according to claim 1, characterized in that: A first bending groove (225) is arranged between the protrusion (221) and the extension part (222), and the milling head (223) and the extension part (222) are connected through a second bending groove (226).
3. The split inner channel cutter with swing angle according to claim 1, characterized in that: The milling part (22) is six and arranged in a circumferential array on the base (21).
4. The split inner channel cutter with swing angle according to claim 1, characterized in that: The cutter head (2) and the cutter handle (1) are movably connected.
5. The split inner channel cutter with swing angle according to claim 4, characterized in that: A locking mechanism is arranged between the cutter head (2) and the cutter handle (1).
6. The split inner channel cutter with swing angle according to claim 5, characterized in that: The locking mechanism comprises a bolt (3) slidably connected to the cutter head (2), a threaded groove (6) is formed on the cutter handle (1), and the bolt (3) is threadedly connected with the threaded groove (6).
7. The split inner channel cutter with swing angle according to claim 6, characterized in that: A through groove (7) is formed on the cutter head (2), and the bolt (3) is slidably connected with the through groove (7).
8. The split inner channel cutter with swing angle according to claim 4, characterized in that: A positioning part is further arranged between the cutter head (2) and the cutter handle (1) to improve the stability of the cutter head (2) during installation.
9. The split inner channel cutter with swing angle according to claim 8, characterized in that: The positioning part comprises a plurality of positioning keys (4) fixedly connected to the cutter head (2), and a positioning groove (5) compatible with the positioning key (4) is formed on the cutter handle (1). When the cutter head (2) is installed on the cutter handle (1), the positioning key (4) is clamped in the positioning groove (5).
10. The split inner channel cutter with swing angle according to claim 9, characterized in that: The positioning key (4) is in the form of a boss.
11. The split inner channel cutter with swing angle according to claim 9, characterized in that: A plurality of the positioning keys (4) are arranged in a circumferential array on the cutter head (2).
12. The split inner channel cutter with swing angle according to claim 9, characterized in that: A plurality of the positioning keys (4) are integrally formed with the cutter head (2).