A single-tooth staggered-tooth thread milling cutter

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By designing a detachable single-tooth staggered-tooth thread milling cutter, the problem of having to replace the tool holder along with the cutter head when it is damaged is solved, which improves processing efficiency and stability, reduces material waste, and is suitable for machining difficult materials.

CN224424481UActive Publication Date: 2026-06-30WEIHAI SHUNJIE PRECISION MOLD CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: WEIHAI SHUNJIE PRECISION MOLD CO LTD
Filing Date: 2025-04-15
Publication Date: 2026-06-30

AI Technical Summary

Technical Problem

Existing thread milling cutters typically use an integrated structure for the cutter head and shank, which means that when the cutter head is damaged, the shank must be replaced along with it, resulting in material waste. Furthermore, traditional thread machining methods are inefficient, have poor precision, and are difficult to remove chips when machining difficult materials.

Method used

A single-tooth staggered-tooth thread milling cutter is designed, employing an installation assembly including a mounting ring, a slot, a locking block, an adjusting screw, a bevel gear, and a bevel gear ring structure. The adjusting screw drives the bevel gear to rotate, achieving a detachable connection between the cutter head and the cutter shank. Combined with the staggered-tooth design of the cutting teeth and chip removal grooves, the machining efficiency and stability are improved.

Benefits of technology

This technology allows for replacement of the tool head when it is damaged, without affecting the tool holder, reducing material waste, improving machining efficiency and chip removal in threaded holes, and enhancing machining stability and tool life.

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Abstract

This utility model relates to the field of machine tool cutting tools in machining processes, and in particular to a single-tooth, staggered-tooth thread milling cutter, including a cutter head, a mounting assembly, and a tool holder. The cutter head includes a milling section, and a mounting head is fixedly connected to the upper end face of the milling section. The mounting head has slots on all four outer walls. The mounting assembly includes a mounting ring, and a mounting groove is formed in the middle of the lower end of the mounting ring. The mounting head is slidably connected within the mounting groove. Multiple sliding grooves are formed within the mounting ring, and locking blocks are slidably connected within these grooves. An adjusting screw is rotatably connected within the mounting ring, and the locking blocks are threaded onto the outer wall of the adjusting screw. This utility model, through the coordinated structure of the mounting head, slots, sliding grooves, locking blocks, adjusting screw, bevel gear, and bevel gear ring, facilitates the assembly and disassembly of the cutter head, preventing the tool holder from being replaced along with the cutter head when it is damaged.

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Description

Technical Field

[0001] This utility model relates to the field of machine tool cutting tool technology in mechanical processing, and in particular to a single-tooth staggered-tooth thread milling cutter. Background Technology

[0002] In machining processes, with the development of technology, materials such as titanium alloys, stainless steel, high-temperature alloys, and high-hardness steel are widely used in military and civilian enterprises. When machining these materials, problems such as difficulty in chip breaking and removal, severe tool sticking, and rapid tool wear arise. Traditional thread machining methods mainly involve turning threads with a thread cutting tool or manually tapping and threading with taps and dies. When machining difficult-to-machine metal materials, the excessive cutting force often causes the tap to twist or even break inside the part. Especially when machining materials with long chips, if chip removal is not smooth, chips will wrap around the tap or block the orifice, often leading to tap chipping or breakage inside the part. Removing a broken tap is not only time-consuming and laborious but may also damage the part. Tap machining inevitably produces a rotation line, affecting machining accuracy. Furthermore, in large-volume thread machining, the relatively low cutting speed of the tap and the need to reverse the tool after threading make it very difficult to improve machining efficiency.

[0003] A patent with publication number CN213410689U discloses a single-tooth, staggered-tooth thread end mill, comprising a shank and a milling section disposed at the front end of the shank. The milling section has four evenly distributed peripheral cutting edges and a first chip removal groove located between two adjacent peripheral cutting edges. Each peripheral cutting edge has a cutting tooth and a corresponding second chip removal groove. The cutting teeth of the four peripheral cutting edges are arranged in a staggered pattern along the rotation direction of the milling section, thus forming a staggered-tooth thread end mill. The thread end mill described in this invention has a simple structure, good chip removal effect, and can not only improve the machining efficiency of small-diameter deep threaded holes and save manufacturing time, but also enhance the stability of the thread end mill and extend its service life. Its good machining stability meets market demand and is suitable for widespread application.

[0004] The applicant found that the above-mentioned patent is similar to most existing thread end mills, with the cutter head and shank usually adopting an integrated structure design. This means that if the cutter head has a problem during the machining process, the shank needs to be replaced as well, which easily leads to material waste. Based on this, we propose an improved single-tooth staggered-tooth thread end mill. Summary of the Invention

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a single-tooth staggered-tooth thread milling cutter.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a single-tooth staggered-tooth thread milling cutter, comprising a cutter head, a mounting assembly, and a cutter shank. The cutter head includes a milling section, and a mounting head is fixedly connected to the upper end face of the milling section. Slots are formed on the four outer walls of the mounting head. The mounting assembly includes a mounting ring, and a mounting groove is formed in the lower center of the mounting ring. The mounting head is slidably connected within the mounting groove. Multiple sliding grooves are formed within the mounting ring, and locking blocks are slidably connected within these grooves. An adjusting screw is rotatably connected within the mounting ring, and the locking blocks are threaded onto the outer wall of the adjusting screw. An annular groove is formed within the mounting ring, and a bevel gear is rotatably connected within the annular groove. A bevel gear is rotatably disposed within the mounting ring, meshing with the bevel gear ring. The bevel gear is fixedly connected to the outer wall of the adjusting screw.

[0007] Through the above technical solution, the device can easily disassemble and assemble the cutter head, avoiding the need to replace the cutter handle along with the cutter head when it is damaged.

[0008] As a further description of the above technical solution:

[0009] Chip removal grooves are provided on the outer wall of the milling part. Cutting teeth and cutting edges are fixedly provided on the outer wall of the milling part. There are multiple cutting teeth and chip removal grooves. The multiple cutting teeth are arranged in a staggered manner along the rotation direction of the milling part. The multiple chip removal grooves and multiple cutting teeth are arranged alternately.

[0010] The above technical solution facilitates the machining of threaded holes and the removal of waste chips.

[0011] As a further description of the above technical solution:

[0012] The slide and the mounting groove are connected, and the mounting groove is made of a rectangular structure.

[0013] The above technical solution prevents the milled part from rotating relative to the mounting ring.

[0014] As a further description of the above technical solution:

[0015] Multiple adjusting screws and bevel gears are provided, and the multiple bevel gears are evenly distributed in the mounting ring. One end of one of the adjusting screws is fixedly connected to an adjusting rod.

[0016] The above technical solution involves rotating one of the adjusting screws by adjusting the lever, which in turn drives the corresponding bevel gear to rotate, thereby driving the bevel gear ring to rotate, which in turn drives the remaining bevel gears to rotate, and in turn drives the remaining adjusting screws to rotate, thus controlling the movement of multiple locking blocks.

[0017] As a further description of the above technical solution:

[0018] A nut is fixedly provided at one end of the adjusting rod, and a mounting hole is provided on the outer wall of the mounting ring, with the nut rotatably disposed in the mounting hole.

[0019] The above technical solution allows the adjusting rod to be easily turned from the outside using a hex wrench.

[0020] As a further description of the above technical solution:

[0021] A locking screw is threaded to one side of the lower end face of the mounting ring, and the upper end of the locking screw is pressed against the outer wall of the adjusting rod.

[0022] The above technical solution allows for adjustment of the pressure on the outer wall of the adjusting rod by rotating the locking screw, thus facilitating the locking of the adjusting rod after rotation and preventing it from continuing to rotate.

[0023] As a further description of the above technical solution:

[0024] An auxiliary ring and a limiting ring are rotatably connected inside the annular groove. The limiting ring is fixedly connected to the outer wall of the auxiliary ring, and the beveled ring is fixedly connected to the lower end face of the auxiliary ring.

[0025] The above technical solution uses an auxiliary ring in conjunction with a limiting ring to limit the rotation of the bevel gear ring, thereby improving the stability of the bevel gear ring during rotation.

[0026] As a further description of the above technical solution:

[0027] The card block is made of a rectangular block and is slidably fitted against the inner wall of the groove.

[0028] The above technical solution prevents the locking block from rotating along with the adjusting screw during movement.

[0029] This utility model has the following beneficial effects:

[0030] 1. Compared with existing technologies, this single-tooth staggered-tooth thread milling cutter, through the coordinated structure of an installation head, a slot, a slide, a locking block, an adjusting screw, a bevel gear, and a bevel gear ring, allows one adjusting screw to drive the connected bevel gear to rotate, which in turn drives the bevel gear ring to rotate, thereby driving multiple other bevel gears to rotate, which in turn drives the remaining adjusting screws to rotate, thus controlling the movement of the locking block. By fitting the locking block into the slot, the installation head is fixed in the installation ring, thus completing the assembly and fixation between the cutter head and the cutter holder. Therefore, it is also convenient to directly remove and replace the cutter head from the installation assembly when it is damaged, thus avoiding the need to replace the cutter holder as well, and saving more materials.

[0031] 2. Compared with the prior art, this single-tooth staggered-tooth thread milling cutter, by setting an auxiliary ring, a limiting ring, an adjusting rod and a locking screw structure, utilizes the auxiliary ring and the limiting ring to rotate within the mounting ring, which can stabilize and limit the rotation of the bevel gear ring, preventing the bevel gear ring from shaking and affecting the meshing degree with the bevel gear. The adjusting rod can provide power for the rotation of the adjusting screw, and the locking screw can lock the adjusting rod when it is not needed to rotate, preventing accidental rotation. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0033] Figure 2 This is a diagram showing the internal structure of the mounting ring of this utility model;

[0034] Figure 3 This is a schematic diagram of the cutter head structure of this utility model;

[0035] Figure 4 This is a complete structural diagram of the auxiliary ring of this utility model.

[0036] Legend:

[0037] 1. Tool head; 101. Milling section; 102. Cutting teeth; 103. Cutting edge; 104. Chip removal groove; 105. Mounting head; 106. Slot; 2. Mounting assembly; 201. Mounting ring; 202. Slide groove; 203. Locking block; 204. Adjusting screw; 205. Bevel gear; 206. Annular groove; 207. Auxiliary ring; 208. Limiting ring; 209. Bevel gear ring; 210. Adjusting rod; 211. Locking screw; 3. Tool holder. Detailed Implementation

[0038] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0039] Reference Figure 1-4This utility model provides a single-tooth staggered-tooth thread milling cutter, comprising a cutter head 1, a mounting assembly 2, and a cutter shank 3. The cutter head 1 includes a milling section 101, with a mounting head 105 fixedly connected to the upper end face of the milling section 101. The mounting head 105 has slots 106 on all four outer walls. The mounting assembly 2 includes a mounting ring 201, with a mounting groove in the middle of its lower end. The mounting head 105 is slidably connected within the mounting groove. The mounting ring 201 has multiple sliding grooves 2. 02. Multiple sliding grooves 202 are slidably connected with locking blocks 203. An adjusting screw 204 is rotatably connected to the mounting ring 201. The locking blocks 203 are threadedly connected to the outer wall of the adjusting screw 204. An annular groove 206 is opened in the mounting ring 201. A bevel gear ring 209 is rotatably connected in the annular groove 206. A bevel gear 205 is rotatably arranged in the mounting ring 201. The bevel gear 205 meshes with the bevel gear ring 209. The bevel gear 205 is fixedly connected to the outer wall of the adjusting screw 204.

[0040] Through the above technical solution, the device facilitates the disassembly and assembly of the cutter head 1, avoiding the need to replace the cutter handle 3 along with the cutter head 1 when it is damaged. By setting up a structure with the mounting head 105, slot 106, slide groove 202, locking block 203, adjusting screw 204, bevel gear 205, and bevel gear ring 209 working together, one of the adjusting screws 204 drives the connected bevel gear 205 to rotate, which in turn drives the bevel gear ring 209 to rotate, and then drives the remaining bevel gears 205 to rotate, which in turn drives the remaining adjusting screws 204 to rotate, thereby controlling the movement of the locking block 203. The locking block 203 fits into the slot 106, thus fixing the mounting head 105 within the mounting ring 201, completing the assembly and fixing of the cutter head 1 and the cutter handle 3. Therefore, it is also convenient to directly remove and replace the cutter head 1 from the mounting assembly 2 when it is damaged, avoiding the need to replace the cutter handle 3 along with it, and saving materials.

[0041] like Figure 1 As shown, a chip removal groove 104 is provided on the outer wall of the milling part 101. Cutting teeth 102 and cutting edges 103 are fixedly provided on the outer wall of the milling part 101. Multiple cutting teeth 102 and multiple chip removal grooves 104 are provided. The multiple cutting teeth 102 are arranged in a staggered manner along the rotation direction of the milling part 101. The multiple chip removal grooves 104 and multiple cutting teeth 102 are staggered, which facilitates the machining of threaded holes and facilitates the discharge of waste chips.

[0042] like Figure 2 As shown, the slide 202 and the mounting groove are connected. The mounting groove is made of a rectangular structure to prevent the milled part 101 from rotating relative to the mounting ring 201.

[0043] Multiple adjusting screws 204 and bevel gears 205 are provided. The multiple bevel gears 205 are evenly distributed in the mounting ring 201. One end of one adjusting screw 204 is fixedly connected to an adjusting rod 210. By rotating one adjusting screw 204 through the adjusting rod 210, the corresponding bevel gear 205 is driven to rotate, which in turn drives the bevel gear ring 209 to rotate, which in turn drives the other multiple bevel gears 205 to rotate, which in turn drives the other adjusting screws 204 to rotate, thus controlling the movement of multiple locking blocks 203.

[0044] A nut is fixedly installed at one end of the adjusting rod 210, and an installation hole is provided on the outer wall of the mounting ring 201. The nut is rotatably installed in the installation hole, making it convenient to turn the adjusting rod 210 from the outside using a hex wrench.

[0045] A locking screw 211 is threaded onto one side of the lower end face of the mounting ring 201. The upper end of the locking screw 211 is pressed against the outer wall of the adjusting rod 210. By rotating the locking screw 211, the pressure on the outer wall of the adjusting rod 210 can be adjusted, so that after rotating the adjusting rod 210, the adjusting rod 210 can be locked by the locking screw 211 to prevent it from continuing to rotate.

[0046] like Figure 4 As shown, an auxiliary ring 207 and a limiting ring 208 are rotatably connected inside the annular groove 206. The limiting ring 208 is fixedly connected to the outer wall of the auxiliary ring 207, and the bevel ring 209 is fixedly connected to the lower end face of the auxiliary ring 207. The rotation of the bevel ring 209 is limited by the auxiliary ring 207 and the limiting ring 208, thereby improving the stability of the bevel ring 209 during rotation.

[0047] The locking block 203 is made of a rectangular block and is slidably attached to the inner wall of the slide groove 202 to prevent the locking block 203 from rotating along with the adjusting screw 204 during movement.

[0048] Working principle: When the cutter head 1 malfunctions, first loosen the locking screw 211 with a hex wrench, then turn the adjusting rod 210 to rotate the connected adjusting screw 204, which in turn rotates the bevel gear 205, which in turn rotates the bevel ring 209. The bevel ring 209 then rotates the remaining bevel gears 205, which in turn rotates the remaining adjusting screws 204. This causes multiple locking blocks 203 to move into the slide groove 202, making it easier for the locking blocks 203 to disengage from the slot 106. This allows the mounting head 105 to be removed from the mounting groove, enabling the milling part 101 to be removed and replaced. During installation, simply reverse the same principle to reinstall the mounting head 105 into the mounting ring 201.

[0049] 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 single-tooth staggered-tooth thread milling cutter, comprising a cutter head (1), a mounting assembly (2), and a cutter holder (3), characterized in that: The cutting head (1) includes a milling part (101), and a mounting head (105) is fixedly connected to the upper end face of the milling part (101). Slots (106) are provided on the four outer walls of the mounting head (105). The mounting assembly (2) includes a mounting ring (201), and a mounting groove is provided in the middle of the lower end of the mounting ring (201). The mounting head (105) is slidably connected in the mounting groove. Multiple sliding grooves (202) are provided in the mounting ring (201), and locking blocks (2) are slidably connected in the multiple sliding grooves (202). 03), an adjusting screw (204) is rotatably connected inside the mounting ring (201), and the locking block (203) is threadedly connected to the outer wall of the adjusting screw (204). An annular groove (206) is provided inside the mounting ring (201), and a bevel gear ring (209) is rotatably connected inside the annular groove (206). A bevel gear (205) is rotatably provided inside the mounting ring (201), and the bevel gear (205) meshes with the bevel gear ring (209). The bevel gear (205) is fixedly connected to the outer wall of the adjusting screw (204).

2. A single-tooth staggered-tooth thread milling cutter according to claim 1, characterized in that: The outer wall of the milling part (101) is provided with chip removal grooves (104). Cutting teeth (102) and cutting edges (103) are fixedly provided on the outer wall of the milling part (101). There are multiple cutting teeth (102) and chip removal grooves (104). The multiple cutting teeth (102) are arranged in a staggered manner along the rotation direction of the milling part (101). The multiple chip removal grooves (104) and multiple cutting teeth (102) are staggered.

3. A single-tooth staggered-tooth thread milling cutter according to claim 1, characterized in that: The slide (202) and the mounting groove are connected, and the mounting groove is made of a rectangular structure.

4. A single-tooth staggered-tooth thread milling cutter according to claim 1, characterized in that: Multiple adjusting screws (204) and bevel gears (205) are provided. Multiple bevel gears (205) are evenly distributed in the mounting ring (201). One end of one of the adjusting screws (204) is fixedly connected to an adjusting rod (210).

5. A single-tooth staggered-tooth thread milling cutter according to claim 4, characterized in that: A nut is fixedly provided at one end of the adjusting rod (210), and an installation hole is provided on the outer wall of the mounting ring (201), with the nut rotatably disposed in the installation hole.

6. A single-tooth staggered-tooth thread milling cutter according to claim 5, characterized in that: The lower end face of the mounting ring (201) is threaded with a locking screw (211), and the upper end of the locking screw (211) is pressed against the outer wall of the adjusting rod (210).

7. A single-tooth staggered-tooth thread milling cutter according to claim 1, characterized in that: An auxiliary ring (207) and a limiting ring (208) are rotatably connected in the annular groove (206). The limiting ring (208) is fixedly connected to the outer wall of the auxiliary ring (207), and the bevel ring (209) is fixedly connected to the lower end face of the auxiliary ring (207).

8. A single-tooth staggered-tooth thread milling cutter according to claim 1, characterized in that: The card block (203) is made of a rectangular block and is slidably attached to the inner wall of the groove (202).