Combined thread milling cutter

Abstract

The utility model belongs to the technical field of machining cutters, particularly relates to a combined thread milling cutter, and provides the following scheme aiming at the problems that the conventional device is of an integral structure, and the whole milling cutter needs to be replaced when a cutting edge of the milling cutter is abraded or damaged in the use process, so that great waste is caused, and the machining cost is increased. Comprising a cutter handle, and one end of the cutter handle is fixedly connected with a guide rod; the milling cutter has the beneficial effects that the cutter as an easily-worn part can be independently replaced, when the cutter is worn or damaged, the whole milling cutter does not need to be replaced, and only the cutter needs to be replaced, and in the mounting process, the cutter can be conveniently and quickly mounted through the matching of the L-shaped clamping rod on the limiting sleeve and the limiting clamping groove of the cutter and the accurate positioning of the positioning screw and the positioning hole. And the consistency of the mounting positions of the cutters each time is ensured, so that the precision of machined threads is ensured, and the product quality is improved.

Description

Technical Field

[0001] This utility model relates to a thread milling cutter, specifically a combined thread milling cutter, belonging to the field of machining tool technology. Background Technology

[0002] In machining, thread cutting is a common and important process. Traditional thread cutting methods mainly include tapping and thread milling. Tapping has many limitations when machining large-diameter threads, blind hole threads, and threads of difficult-to-machine materials, such as easy breakage and difficulty in chip removal. Thread milling, on the other hand, has higher machining accuracy and efficiency and is more suitable for complex working conditions.

[0003] In the prior art, such as the thread milling cutter disclosed in announcement number CN207479764U, a single-tooth thread milling cutter is used. It occupies little machining space, does not require multiple feeds during use, saves manpower and resources, reduces labor costs, effectively improves thread machining efficiency, and can cut threads in one step, simplifying the machining process and further improving machining efficiency and performance, while ensuring the surface finish of the machined workpiece. However, the above-mentioned prior art has the following shortcomings: the above-mentioned thread milling cutter has an integral structure. During use, when the cutting edge of the milling cutter is worn or damaged, the entire milling cutter needs to be replaced, resulting in great waste and increasing machining costs. Utility Model Content

[0004] The purpose of this invention is to provide a modular thread milling cutter to address the problem that the aforementioned device is an integral structure, and when the cutting edge of the milling cutter is worn or damaged during use, the entire milling cutter needs to be replaced, resulting in great waste and increased processing costs.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a combined thread milling cutter, including a tool holder, with a guide rod fixedly connected to one end of the tool holder;

[0006] A cutting tool is provided at one end of the guide rod, and a cutting tool mounting groove adapted to the cutting tool is opened on the surface of the end of the guide rod away from the tool holder. The cutting tool is detachably mounted on the surface of the end of the guide rod away from the tool holder through the cutting tool mounting groove.

[0007] As a further embodiment of this utility model: a dovetail block is fixedly installed on the surface of the cutting tool, and a matching dovetail groove is opened at the bottom of the cutting tool mounting groove. The cutting tool is installed in the cutting tool mounting groove by the cooperation of the dovetail block and the dovetail groove.

[0008] As a further improvement of this utility model: a positioning screw is inserted into the through hole at the center of the cutting tool, and one end of the positioning screw passes through the cutting tool and is threaded into the positioning hole opened on the bottom surface of the cutting tool mounting groove.

[0009] As a further improvement of this utility model: a rotating sleeve groove is provided at one end of the guide rod, a limiting sleeve is inserted into the rotating sleeve groove, an L-shaped locking rod is integrally formed on the surface of the limiting sleeve, and a limiting groove adapted to one end of the L-shaped locking rod is provided on the surface of the cutting blade.

[0010] As a further embodiment of this utility model: a limiting sleeve limiting screw is inserted into the limiting sleeve, one end of the limiting sleeve limiting screw passes through the limiting sleeve and is threaded to the inside of one end of the guide rod.

[0011] As a further improvement of this utility model: the outer side of the limiting sleeve and the limiting screw is integrally formed with a retaining ring, and the limiting sleeve has a stepped retaining protrusion, with the retaining ring abutting against the surface of the stepped retaining protrusion.

[0012] The beneficial effects of this utility model are:

[0013] This utility model utilizes a combination of structures including a tool holder, a limiting slot, a cutting tool mounting slot, a dovetail groove, a dovetail block, a positioning screw, a rotating sleeve slot, a limiting sleeve limiting screw, a stepped locking protrusion, and a retaining ring. The cutting tool, being a wear-prone component, can be replaced individually. When the cutting tool is worn or damaged, it is not necessary to replace the entire milling cutter; only the cutting tool needs to be replaced, significantly reducing tool purchase costs. Furthermore, this replaceable design allows for the reuse of other components such as the tool holder and guide rod, improving resource utilization.

[0014] Each component adopts a design such as the dovetail block and dovetail groove fit, and the positioning screw and positioning hole connection, which makes the installation and disassembly of the cutting tool simple and quick. In actual production, it reduces the downtime caused by tool replacement and thus improves the overall processing efficiency.

[0015] During installation, the L-shaped retaining rod on the limiting sleeve cooperates with the limiting groove of the cutting tool, and the positioning screw and positioning hole provide precise positioning, ensuring the consistency of the cutting tool's installation position each time, thereby guaranteeing the accuracy of the machined threads and improving product quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the dovetail groove, positioning hole, and cutting tool mounting groove in this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the limiting sleeve, L-shaped locking rod, and cutting tool in this utility model;

[0019] Figure 4 This is a schematic diagram of the cutting tool and dovetail block in this utility model;

[0020] Figure 5 This is a schematic diagram of the limiting sleeve and L-shaped locking rod in this utility model;

[0021] Figure 6 This is a schematic diagram of the stepped protrusion, limiting sleeve, and L-shaped locking rod in this utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the limiting sleeve, limiting screw, and retaining ring in this utility model;

[0023] In the diagram: 1. Tool holder; 2. Guide rod; 3. Cutting tool; 4. Limiting slot; 5. Cutting tool mounting slot; 6. Positioning hole; 7. Dovetail groove; 8. Dovetail block; 9. Positioning screw; 10. Limiting sleeve; 11. Rotating sleeve slot; 12. L-shaped locking rod; 13. Limiting sleeve limiting screw; 14. Stepped locking protrusion; 15. Snap ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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. Example 1

[0025] like Figures 1 to 7 As shown, a combined thread milling cutter includes a tool holder 1, with a guide rod 2 fixedly connected to one end of the tool holder 1.

[0026] A cutting blade 3 is provided at one end of the guide rod 2. A cutting blade mounting groove 5 adapted to the cutting blade 3 is opened on the surface of the end of the guide rod 2 away from the tool holder 1. The cutting blade 3 is detachably mounted on the surface of the end of the guide rod 2 away from the tool holder 1 through the cutting blade mounting groove 5.

[0027] When the cutting tool 3 is worn or damaged, it can be simply removed from the cutting tool mounting slot 5 and replaced with a new cutting tool 3, without having to replace the entire milling cutter. This greatly reduces processing costs and improves resource utilization. When facing different thread processing needs, different types and specifications of cutting tools 3 can be selected and installed on the guide rod 2 according to the actual situation, thereby realizing the processing of various threads and enhancing the versatility and adaptability of the milling cutter.

[0028] Furthermore, a dovetail block 8 is fixedly installed on the surface of the cutting tool 3, and a matching dovetail groove 7 is opened at the bottom of the cutting tool mounting groove 5. The cutting tool 3 is installed in the cutting tool mounting groove 5 through the cooperation of the dovetail block 8 and the dovetail groove 7.

[0029] The precise fit between the dovetail block 8 and the dovetail groove 7 ensures that the cutting tool 3 is accurately positioned during installation, and the positional accuracy remains consistent each time. This ensures that the machining accuracy of the threads is not affected by the deviation in the installation position of the cutting tool 3 when machining different batches of threads, thus guaranteeing the consistency and stability of the machining process and improving the yield rate of the products.

[0030] Furthermore, a positioning screw 9 is inserted into the through hole at the center of the cutting tool 3. The positioning screw 9 passes through one end of the cutting tool 3 and is threaded into the positioning hole 6 opened on the bottom surface of the cutting tool mounting groove 5.

[0031] After the dovetail block 8 and the dovetail groove 7 cooperate to achieve the initial installation of the cutting tool 3, the positioning screw 9 further fixes the cutting tool 3 firmly in the cutting tool mounting groove 5. During the thread machining process, the cutting tool 3 will be subjected to a large cutting force and vibration. The positioning screw 9 can effectively prevent the cutting tool 3 from being displaced, loosened or falling off due to the force, ensuring the stability of the milling cutter during high-speed rotation and cutting operations, and ensuring the smooth progress of the machining process. Example 2

[0032] Improvements based on Example 1:

[0033] Furthermore, one end of the guide rod 2 is provided with a rotating sleeve groove 11, and a limiting sleeve 10 is inserted into the rotating sleeve groove 11. An L-shaped locking rod 12 is integrally formed on the surface of the limiting sleeve 10, and a limiting groove 4 that matches one end of the L-shaped locking rod 12 is provided on the surface of the cutting blade 3.

[0034] The design of the L-shaped locking rod 12 and the limiting groove 4 ensures precise positioning each time the cutting tool 3 is installed. As long as the L-shaped locking rod 12 is accurately inserted into the limiting groove 4, the cutting tool 3 will be in the preset optimal cutting position, ensuring the consistency of processing, reducing thread processing errors caused by the position deviation of the cutting tool 3, and improving product quality.

[0035] Furthermore, a limiting sleeve limiting screw 13 is inserted into the limiting sleeve 10, and one end of the limiting sleeve limiting screw 13 passes through the limiting sleeve 10 and is threaded to the inside of one end of the guide rod 2.

[0036] The threaded connection between the limiting sleeve limiting screw 13 and the guide rod 2 not only fixes the limiting sleeve 10, but also further enhances the reliability of the entire milling cutter structure.

[0037] Furthermore, the outer side of the limiting sleeve limiting screw 13 is integrally formed with a retaining ring 15, and the limiting sleeve 10 has a stepped retaining protrusion 14, with the retaining ring 15 abutting against the surface of the stepped retaining protrusion 14.

[0038] The contact between the retaining ring 15 and the stepped retaining protrusion 14 forms a stable limiting structure, which can effectively prevent the limiting sleeve and limiting screw 13 from axial movement due to external forces such as vibration and impact when the milling cutter is working.

[0039] Working principle: Before thread machining, the tool holder 1 should be securely installed on the machine tool spindle to ensure a tight connection and avoid loosening during machining, which would affect machining accuracy and safety.

[0040] Next, align the dovetail block 8 of the cutting tool 3 with the dovetail groove 7 at the bottom of the cutting tool mounting slot 5, and gently push the cutting tool 3 along the dovetail groove 7 to make the two fit tightly and achieve initial installation. Then, assemble the rotating sleeve groove 11 at one end of the guide rod 2 with the limiting sleeve 10, so that the limiting sleeve 10 is accurately inserted into the rotating sleeve groove 11. Then, pass the limiting sleeve limiting screw 13 through the limiting sleeve 10 and screw it into the inside of one end of the guide rod 2 until the retaining ring 15 tightly abuts against the surface of the stepped retaining protrusion 14 to complete the fixing of the limiting sleeve 10. At this time, the limiting groove 4 on the surface of the cutting tool 3 corresponds to the position of the L-shaped retaining rod 12 on the limiting sleeve 10. Insert the L-shaped retaining rod 12 into the limiting groove 4 to further restrict the position of the cutting tool 3.

[0041] Finally, the positioning screw 9 is passed through the through hole at the center of the cutting tool 3 and screwed into the positioning hole 6 opened on the bottom surface of the cutting tool mounting groove 5 to complete the secure installation of the cutting tool 3.

[0042] During long-term processing, the cutting tool 3, as a component that directly participates in the cutting work, will inevitably experience wear or damage. When it is found that the wear or damage of the cutting tool 3 affects the processing quality, it needs to be replaced in time. First, unscrew the positioning screw 9 and remove it from the positioning hole 6 of the cutting tool 3 and the cutting tool mounting groove 5. Then, pull the L-shaped locking rod 12 out of the limiting locking groove 4 to release the limiting of the cutting tool 3. Next, along the direction of the dovetail groove 7, remove the worn or damaged cutting tool 3 from the cutting tool mounting groove 5.

[0043] When replacing the new cutting tool 3, follow the steps of the above installation process, install the new cutting tool 3 in the cutting tool mounting slot 5 through the cooperation of the dovetail block 8 and the dovetail groove 7, and complete the following operations in sequence: insert the L-shaped locking rod 12 into the limiting locking slot 4, screw the positioning screw 9 into the positioning hole 6, etc., to ensure that the new cutting tool 3 is installed firmly, and then you can continue to carry out thread machining.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A combined thread milling cutter, comprising a shank (1), wherein a guide rod (2) is fixedly connected to one end of the shank (1); characterized in that: A cutting blade (3) is provided at one end of the guide rod (2); The guide rod (2) has a cutting tool mounting groove (5) on the end surface away from the tool holder (1) that is compatible with the cutting tool (3). The cutting tool (3) is detachably mounted on the end surface of the guide rod (2) away from the tool holder (1) through the cutting tool mounting groove (5).

2. The combined thread milling cutter according to claim 1, characterized in that: The surface of the cutting tool (3) is fixedly mounted with a dovetail block (8), and the bottom of the cutting tool mounting groove (5) is provided with a matching dovetail groove (7). The cutting tool (3) is installed in the cutting tool mounting groove (5) through the cooperation of the dovetail block (8) and the dovetail groove (7).

3. The combined thread milling cutter according to claim 1, characterized in that: A positioning screw (9) is inserted into the through hole at the center of the cutting tool (3). The positioning screw (9) is threaded through one end of the cutting tool (3) and connected to the positioning hole (6) opened on the bottom surface of the cutting tool mounting groove (5).

4. The combined thread milling cutter according to claim 1, characterized in that: One end of the guide rod (2) is provided with a rotating sleeve groove (11), and a limiting sleeve (10) is inserted into the rotating sleeve groove (11). An L-shaped locking rod (12) is integrally formed on the surface of the limiting sleeve (10), and a limiting groove (4) adapted to one end of the L-shaped locking rod (12) is provided on the surface of the cutting blade (3).

5. The combined thread milling cutter according to claim 4, characterized in that: The limiting sleeve (10) is inserted with a limiting sleeve limiting screw (13), one end of which passes through the limiting sleeve (10) and is threaded to the inside of one end of the guide rod (2).

6. The combined thread milling cutter according to claim 5, characterized in that: The outer side of the limiting sleeve limiting screw (13) is integrally formed with a retaining ring (15), and the limiting sleeve (10) has a stepped retaining protrusion (14), and the retaining ring (15) abuts against the surface of the stepped retaining protrusion (14).

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