Quick-change head threaded milling cutter

Abstract

The utility model discloses a quick change tool holder thread milling cutter relates to machining tool field, including tool holder still includes compensation mechanism and quick change mechanism, compensation mechanism sets up in the rear end of tool holder, and compensation mechanism includes adjusting assembly, auxiliary assembly, limit component and sleeve, sleeve sliding connection is in the outer surface of tool holder, and adjusting assembly sets up in the inside of sleeve, and limit component sets up in the outer surface of tool holder, and auxiliary assembly sets up in the outer surface of sleeve, and quick change mechanism sets up in the front end of tool holder, the utility model discloses a quick change tool holder thread milling cutter, can effectively compensate the tiny difference of the distance between tool and workpiece due to tool installation deviation, wear or processing different workpieces, and the quick dismounting and replacement of tool head are realized, and the production efficiency is improved and the use cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of machining tools, specifically a quick-change thread milling cutter. Background Technology

[0002] A thread milling cutter is a cutting tool used on CNC machine tools to machine threads. Its working principle is that when the machine tool executes a helical interpolation command, the milling cutter moves in an arc along the X and Y axes while simultaneously moving one pitch along the Z axis, thus milling the thread profile. Compared to traditional taps and dies, thread milling cutters generally have advantages in machining accuracy, efficiency, applicability, and tool life, and are particularly suitable for machining high-hardness materials, large-diameter threads, and threads with different helix directions. However, existing thread milling cutters still have some significant limitations.

[0003] Many existing thread milling cutters lack a convenient and precise tool working length compensation mechanism. When there are slight deviations in tool installation, adjustments are needed for machining different workpieces, or the tool wears out normally, compensation is often required through tedious steps such as manual trial cutting, shim adjustment, or reclamping. This is not only inefficient but also makes it difficult to guarantee accuracy. This inconvenience in adjustment directly affects the automation level and production efficiency of CNC machining, and also places high demands on the operator's experience, making it difficult to quickly adapt to the flexible production needs of multiple varieties and small batches.

[0004] Traditional solid thread end mills or partially outdated modular end mills typically require the entire tool to be removed from the machine and replaced when the cutting head wears or needs to be changed. This process is time-consuming, leading to increased machine downtime. More importantly, once the cutting head of a solid tool is damaged, it often means the entire tool is scrapped, resulting in high operating costs. For machining scenarios that require frequent cutting head replacements to adapt to different thread specifications, the existing replacement process is complex and makes it difficult to achieve rapid online tool changing, reducing production flexibility and overall efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a quick-change thread end mill to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A quick-change thread milling cutter includes a tool holder, a compensation mechanism, and a quick-change mechanism; The compensation mechanism is located at the rear end of the tool holder. The compensation mechanism includes an adjustment component, an auxiliary component, a limiting component, and a sleeve. The sleeve is slidably connected to the outer surface of the tool holder. The adjustment component is located inside the sleeve. The limiting component is located on the outer surface of the tool holder. The auxiliary component is located on the outer surface of the sleeve. The quick-change mechanism is located at the front end of the tool holder. The quick-change mechanism includes a locking component, a positioning component, and a thread milling cutter head. The thread milling cutter head is located at the front end of the tool holder, the locking component is located at the rear end of the thread milling cutter head, and the positioning component is located inside the tool holder.

[0007] As a further embodiment of this utility model: the adjustment component includes a threaded groove, a lead screw, and a knob. The threaded groove is formed at the rear end of the tool holder, the lead screw is threadedly connected inside the threaded groove, the knob is rotatably connected to the rear end of the sleeve, and the rear end of the lead screw is fixedly connected to the front end of the knob.

[0008] As a further embodiment of this utility model: the limiting component includes a guide rail and a limiting groove. The guide rail is fixedly installed on the outer surface of the tool holder, and the limiting groove is opened at the front end of the sleeve. The guide rail and the limiting groove are slidably connected.

[0009] As a further embodiment of this utility model: the snap-fit ​​assembly includes a snap-fit ​​seat and a snap-fit ​​groove. The snap-fit ​​seat is fixedly installed on the rear end of the thread milling cutter head, and the snap-fit ​​groove is opened on the outer surface of the cutter head. The snap-fit ​​seat and the snap-fit ​​groove are slidably connected.

[0010] As a further embodiment of this utility model: the positioning component includes a mounting groove, a spring, a positioning pin, a positioning slot, a sliding groove, and a slider. The mounting groove is opened at the front end of the tool holder, the spring is fixedly installed inside the rear end of the mounting groove, the positioning pin is slidably connected inside the mounting groove, and the rear end of the positioning pin is fixedly connected to the front end of the spring. The positioning slot is opened at the rear end of the thread milling cutter head, and the positioning slot cooperates with the positioning pin. The sliding groove is opened on the outer surface of the tool holder, and the slider is fixedly installed on the outer surface of the positioning pin. The slider is slidably connected to the inside of the sliding groove.

[0011] As a further embodiment of this utility model: the auxiliary component includes an anti-slip coating and an anti-slip opening, the anti-slip coating is applied to the outer surface of the sleeve, and the anti-slip opening is opened on the outer surface of the knob.

[0012] As a further embodiment of this invention, the positioning pin is made of high-toughness, high-impact steel.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model discloses a quick-change thread milling cutter. The compensation mechanism drives the lead screw to rotate by rotating the knob. With the cooperation of the limiting component, the rotational motion is converted into the linear extension and retraction motion of the tool holder in the sleeve. This design allows the operator to quickly and accurately fine-tune the overall working length of the tool, effectively compensating for the slight differences in the distance between the tool and the workpiece caused by tool installation deviation, wear, or machining different workpieces. This significantly reduces the reliance on complex machine tool settings and improves machining adaptability and accuracy reliability.

[0014] 2. This utility model discloses a quick-change thread milling cutter. The quick-change mechanism achieves initial alignment and connection between the thread milling cutter head and the tool holder through a snap-fit ​​component, and then achieves final locking of the thread milling cutter head through the cooperation of a positioning component. This design enables quick disassembly and replacement of the thread milling cutter head. When the thread milling cutter head is worn or needs to be replaced with a different specification of thread milling cutter, the operator does not need to replace the entire tool. He can simply slide the positioning pin to complete the replacement of the thread milling cutter head, which greatly reduces the downtime required for tool replacement and improves production efficiency. At the same time, this structure reduces the overall tool scrap cost caused by the wear of the thread milling cutter head, saves tool usage costs, and ensures the repeatability accuracy of the position of the thread milling cutter head after replacement, which is conducive to maintaining machining stability. It is particularly suitable for small-batch, multi-variety production scenarios that require frequent replacement of thread milling cutter heads or machining different specifications of threads. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the tool holder structure in this utility model.

[0017] Figure 3 This is a schematic diagram of the lead screw structure in this utility model.

[0018] Figure 4 This is a schematic diagram of the sleeve structure in this utility model.

[0019] Figure 5 This is a schematic diagram of the mounting groove structure in this utility model.

[0020] Figure 6 This is a schematic diagram of the thread milling cutter head structure in this utility model.

[0021] The components are: 1. Tool holder; 2. Sleeve; 3. Threaded groove; 4. Lead screw; 5. Knob; 6. Guide rail; 7. Limiting groove; 8. Thread milling cutter head; 9. Socket; 10. Socket groove; 11. Mounting groove; 12. Spring; 13. Locating pin; 14. Locating groove; 15. Slide groove; 16. Slider; 17. Anti-slip coating; 18. Anti-slip opening. Detailed Implementation

[0022] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0023] The present invention provides the following preferred embodiments: Example 1, as Figures 1-6 As shown, a quick-change thread milling cutter includes a tool holder 1, a compensation mechanism, and a quick-change mechanism; The compensation mechanism is located at the rear end of the tool holder 1. The compensation mechanism includes an adjustment component, an auxiliary component, a limiting component, and a sleeve 2. The sleeve 2 is slidably connected to the outer surface of the tool holder 1. The adjustment component is located inside the sleeve 2. The limiting component is located on the outer surface of the tool holder 1. The auxiliary component is located on the outer surface of the sleeve 2. The quick-change mechanism is located at the front end of the tool holder 1. The quick-change mechanism includes a snap-fit ​​component, a positioning component, and a thread milling cutter head 8. The thread milling cutter head 8 is located at the front end of the tool holder 1, the snap-fit ​​component is located at the rear end of the thread milling cutter head 8, and the positioning component is located inside the tool holder 1.

[0024] like Figures 1-4 As shown, the adjustment assembly includes a threaded groove 3, a lead screw 4, and a knob 5. The threaded groove 3 is located at the rear end of the tool holder 1. The lead screw 4 is threaded into the inside of the threaded groove 3. The knob 5 is rotatably connected to the rear end of the sleeve 2. The rear end of the lead screw 4 is fixedly connected to the front end of the knob 5. By rotating the knob 5, the lead screw 4 is driven to rotate. At the same time, with the assistance of the limiting assembly restricting the rotation of the tool holder 1, the rotation of the tool holder 1 is changed to linear movement, thereby controlling the extension and retraction of the tool holder 1 inside the sleeve 2. This is used to adjust the overall length of the thread milling cutter to compensate for the distance difference between the tool and the workpiece.

[0025] like Figures 2-4 As shown, the limiting component includes a guide rail 6 and a limiting groove 7. The guide rail 6 is fixedly installed on the outer surface of the tool holder 1, and the limiting groove 7 is opened at the front end of the sleeve 2. The guide rail 6 and the limiting groove 7 are slidably connected. Due to the presence of the guide rail 6, the tool holder 1 can only move linearly inside the limiting groove 7. This avoids the screw 4 from rotating together with the tool holder 1 when the knob 5 is turned, which would prevent the length compensation function from working properly. It also avoids the situation where, after loading the thread milling cutter, the equipment only drives the sleeve 2 to rotate and cannot link the tool holder, thus preventing the thread milling work from being performed normally.

[0026] like Figures 1-6 As shown, the snap-fit ​​assembly includes a snap-fit ​​base 9 and a snap-fit ​​groove 10. The snap-fit ​​base 9 is fixedly installed on the rear end of the thread milling cutter head 8, and the snap-fit ​​groove 10 is opened on the outer surface of the cutter holder 1. The snap-fit ​​base 9 and the snap-fit ​​groove 10 are slidably connected. The thread milling cutter head 8 is inserted into the snap-fit ​​groove 10 on the cutter holder 1 through the snap-fit ​​base 9, so that the two can complete the initial connection.

[0027] like Figures 1-6As shown, the positioning assembly includes a mounting groove 11, a spring 12, a positioning pin 13, a positioning groove 14, a sliding groove 15, and a slider 16. The mounting groove 11 is located at the front end of the tool holder 1. The spring 12 is fixedly mounted inside the rear end of the mounting groove 11. The positioning pin 13 is slidably connected inside the mounting groove 11, and its rear end is fixedly connected to the front end of the spring 12. The positioning groove 14 is located at the rear end of the thread milling cutter head 8 and cooperates with the positioning pin 13. The sliding groove 15 is located on the outer surface of the tool holder 1. The slider 16 is fixedly mounted on the outer surface of the positioning pin 13 and is slidably connected to the interior of the sliding groove 15. By moving the slider 16 backward, the positioning pin 13 is moved backward synchronously, thus affecting the spring. When the locating pin 13 is retracted into the slide groove 15, it will not affect the connection between the thread milling cutter head 8 and the tool holder 1 through the retainer 9 and the slot 10. After the thread milling cutter head 8 and the tool holder 1 are initially connected, the control of the slider 16 is released to release the compressed spring 12, pushing the locating pin 13 forward until it is inserted into the locating groove 14, thereby fixing the position of the thread milling cutter head 8 so that it will not detach from the connection with the tool holder 1. On the contrary, when the thread milling cutter head 8 needs to be maintained, the slider 16 is moved backward to disengage the locating pin 13 from the locating groove 14, and the thread milling cutter head 8 and the retainer 9 are slid out from the slot 10 to complete the disassembly, thus completing the function of quick-change tool head.

[0028] like Figure 4 As shown, the auxiliary components include an anti-slip coating 17 and an anti-slip opening 18. The anti-slip coating 17 is applied to the outer surface of the sleeve 2, and the anti-slip opening 18 is opened on the outer surface of the knob 5. The anti-slip opening 18 can increase the friction between the operator's fingers and the surface of the knob 5, helping the operator to easily exert force when turning the knob 5 without slipping. The anti-slip coating 17 is made of Teflon material, which can improve the clamping force of the equipment clamp on the sleeve 2 and prevent loosening.

[0029] like Figure 5 As shown, the positioning pin 13 is made of high-toughness and high-impact steel material. The high-toughness and high-impact steel material is high-speed steel, which has high bending strength and toughness. The positioning pin 13 can serve as a central connecting part to provide safety assurance.

[0030] The specific working process of this utility model is as follows: The adjustment process of the compensation mechanism is as follows: Based on the relative position of the machine tool spindle and the workpiece, the knob 5 is rotated. The anti-slip opening 18 on the knob 5 helps to apply force. The rotation of the knob 5 drives the lead screw 4, which is fixed to it, to rotate. Since the guide rail 6 on the outer surface of the tool holder 1 slides with the limiting groove 7 on the sleeve 2, the rotation of the tool holder 1 is restricted. The rotational motion of the lead screw 4 is converted into the linear extension and retraction motion of the tool holder 1 within the sleeve 2. Rotating the knob 5 forward extends the tool holder, increasing the total length of the tool; rotating it backward retracts the tool holder, decreasing the length, thereby accurately compensating for the distance difference between the tool and the workpiece. The operation process of the quick change mechanism is as follows: First, the slider 16 of the positioning assembly is slid backward when installing the cutter head. The slider 16 moves along the slide groove 15 and drives the positioning pin 13 to compress the spring 12 backward, so that it is completely retracted into the mounting groove 11. Then, the retainer 9 at the rear end of the thread milling cutter head 8 is aligned and inserted into the retainer groove 10 on the tool holder 1. Once the holder 9 and slot 10 are properly engaged, release the slider 16. The compressed spring 12 then releases its elasticity, pushing the locating pin 13 forward so that it precisely inserts into the locating groove 14 at the rear end of the thread milling cutter head 8. This completes the radial and circumferential fixing of the thread milling cutter head 8. When it is necessary to replace or maintain the thread milling cutter head 8, simply move the slider 16 backward again to disengage the locating pin 13 from the locating groove 14, allowing the thread milling cutter head 8 and holder 9 to slide out of the slot 10 for quick disassembly. During machining, the locating pin 13 bears the cutting force and is made of high-toughness high-speed steel, ensuring reliable connection and machining stability.

[0031] The beneficial effects of this utility model are specifically reflected in the fact that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. 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 quick-change thread milling cutter, comprising a tool holder (1), characterized in that: It also includes compensation agencies and quick-change agencies; The compensation mechanism is located at the rear end of the tool holder (1). The compensation mechanism includes an adjustment component, an auxiliary component, a limiting component, and a sleeve (2). The sleeve (2) is slidably connected to the outer surface of the tool holder (1). The adjustment component is located inside the sleeve (2). The limiting component is located on the outer surface of the tool holder (1). The auxiliary component is located on the outer surface of the sleeve (2). The quick-change mechanism is located at the front end of the tool holder (1). The quick-change mechanism includes a snap-fit ​​component, a positioning component, and a thread milling cutter head (8). The thread milling cutter head (8) is located at the front end of the tool holder (1), the snap-fit ​​component is located at the rear end of the thread milling cutter head (8), and the positioning component is located inside the tool holder (1).

2. A quick-change thread milling cutter according to claim 1, characterized in that, The adjustment assembly includes a threaded groove (3), a lead screw (4), and a knob (5). The threaded groove (3) is located at the rear end of the tool holder (1). The lead screw (4) is threaded into the inside of the threaded groove (3). The knob (5) is rotatably connected to the rear end of the sleeve (2). The rear end of the lead screw (4) is fixedly connected to the front end of the knob (5).

3. A quick-change thread milling cutter according to claim 1, characterized in that, The limiting component includes a guide rail (6) and a limiting groove (7). The guide rail (6) is fixedly installed on the outer surface of the tool holder (1), and the limiting groove (7) is opened at the front end of the sleeve (2). The guide rail (6) and the limiting groove (7) are slidably connected.

4. A quick-change thread milling cutter according to claim 1, characterized in that, The snap-fit ​​assembly includes a snap-fit ​​seat (9) and a snap-fit ​​groove (10). The snap-fit ​​seat (9) is fixedly installed on the rear end of the thread milling cutter head (8), and the snap-fit ​​groove (10) is opened on the outer surface of the cutter holder (1). The snap-fit ​​seat (9) and the snap-fit ​​groove (10) are slidably connected.

5. A quick-change thread milling cutter according to claim 1, characterized in that, The positioning assembly includes a mounting groove (11), a spring (12), a positioning pin (13), a positioning groove (14), a sliding groove (15), and a slider (16). The mounting groove (11) is located at the front end of the tool holder (1). The spring (12) is fixedly installed inside the rear end of the mounting groove (11). The positioning pin (13) is slidably connected inside the mounting groove (11). The rear end of the positioning pin (13) is fixedly connected to the front end of the spring (12). The positioning groove (14) is located at the rear end of the thread milling cutter head (8). The positioning groove (14) cooperates with the positioning pin (13). The sliding groove (15) is located on the outer surface of the tool holder (1). The slider (16) is fixedly installed on the outer surface of the positioning pin (13). The slider (16) is slidably connected to the inside of the sliding groove (15).

6. A quick-change thread milling cutter according to claim 2, characterized in that, The auxiliary components include an anti-slip coating (17) and an anti-slip opening (18). The anti-slip coating (17) is applied to the outer surface of the sleeve (2), and the anti-slip opening (18) is opened on the outer surface of the knob (5).

7. A quick-change thread milling cutter according to claim 5, characterized in that, The positioning pin (13) is made of high-toughness, high-impact steel.

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