Cutter for machining inner groove

Abstract

The cutter for machining the inner groove comprises a cutter bar, a cutter head and a locking mechanism, and a mounting groove is formed in one end of the cutter bar; the cutter head comprises a cutter pad and a blade which are integrally connected, and one section of the cutter pad is arranged in the mounting groove; the locking mechanism is arranged on the cutter bar and used for pressing one section of the cutter pad into the mounting groove, and the cutter has the advantages that the blade breakage risk is reduced, and the service life of the cutter is prolonged.

Description

Technical Field

[0001] This application relates to the field of cutting tool technology, and in particular to a tool for machining internal grooves. Background Technology

[0002] Internal grooving tools are mainly used for machining internal grooves, relief grooves, overrun grooves, sealing grooves, or internal cavities in parts with internal holes. They can perform radial cutting or axial cutting and are widely used in lathe machining.

[0003] The existing internal grooving cutter mainly consists of a cutter shank, cutter pad, cutting blade, and locking screw. The locking screw detachably connects the cutting blade to the cutter pad, allowing for the replacement of cutting blades of different specifications. However, due to the thinness and short length of the cutting blade, it is prone to breakage and damage during grooving, resulting in a short service life. Furthermore, the locking structure acts directly on the cutting blade, and vibrations generated during processing can easily cause the cutting blade to loosen, affecting the processing quality. Utility Model Content

[0004] The main objective of this application is to provide a cutting tool for machining internal grooves, which aims to solve the technical problems of easy breakage and short service life of the cutting inserts in existing internal groove cutting tools.

[0005] To achieve the above objectives, this application provides a cutting tool for machining internal grooves, including a tool holder, a cutting head, and a locking mechanism. One end of the tool holder has a mounting groove. The cutting head includes an integrally connected cutting pad and a cutting blade, with one section of the cutting pad disposed in the mounting groove. The locking mechanism is disposed on the tool holder and is used to press one section of the cutting pad into the mounting groove.

[0006] Optionally, the blade includes a first base and a first cutting groove. The first base is integrally connected to the blade pad, and the thickness of the first base is equal. The first cutting groove is integrally connected to one side of the first base and is integrally connected to the blade pad. The thickness of the first cutting groove decreases in the direction away from the first base.

[0007] Optionally, the blade includes a second base and a second cutting groove. The second base is integrally connected to the blade pad, and the thickness of the second base is equal. The second cutting groove is integrally connected to the end of the second base away from the blade pad. The cross-section of the second cutting groove is arc-shaped, and a section of beveled surface is provided at the top of the second cutting groove.

[0008] Optionally, a thickened portion is provided at the connection point between the blade and the blade pad.

[0009] Optionally, a clearance groove is provided on the back of the blade pad, and the clearance groove is located on the side of the blade pad close to the blade; wherein, the back of the blade pad is the side of the blade pad that is away from the blade.

[0010] Optionally, the included angle between the blade pad and the blade is θ, where θ ranges from 90° to 150°.

[0011] Optionally, the locking mechanism includes a clamping block and a locking screw. The clamping block is used to clamp the blade pad. The locking screw is threaded through the clamping block, and the blade shank has a threaded hole that mates with the locking screw.

[0012] The beneficial effects that this application can achieve are as follows:

[0013] This application includes a tool holder, a tool head, and a locking mechanism. One end of the tool holder has a mounting groove. The tool head includes an integrally connected tool pad and a cutting blade, with one section of the tool pad positioned within the mounting groove. The locking mechanism is mounted on the tool holder and is used to press one section of the tool pad into the mounting groove. Based on the tool structure of this application, the tool head, with its tool pad and cutting blade integrated into a single structure, enhances the structural strength of the cutting blade. When the cutting blade needs to be replaced, the entire tool head can be replaced directly. Furthermore, the locking mechanism presses one section of the tool pad into the mounting groove. Since the tool pad has a relatively large thickness and width, a larger pressing area can be used, thereby increasing the locking force, rather than directly locking the cutting blade. This improves the cutting blade's lifespan and reduces the impact of cutting blade loosening on machining quality. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 This is a schematic diagram of the first structure of a tool for machining internal grooves according to an embodiment of this application;

[0016] Figure 2 This is a schematic diagram of a second structure of a tool for machining internal grooves according to an embodiment of this application;

[0017] Figure 3 This is a schematic diagram of a third structure of a tool for machining internal grooves according to an embodiment of this application;

[0018] Figure 4 This is a three-dimensional structural diagram of the tool holder and tool head combined in an embodiment of this application;

[0019] Figure 5 This is a schematic diagram of a first structure of the cutter head in an embodiment of this application;

[0020] Figure 6 This is a schematic diagram of a second structure of the cutter head in an embodiment of this application.

[0021] Figure label:

[0022] 100-Tool holder, 200-Tool head, 210-Tool pad, 211-Allowing groove, 220-Insert blade, 221-First base, 222-First cutting groove, 223-Second base, 224-Second cutting groove, 230-Thickened part, 225-Beveled surface, 300-Locking mechanism, 310-Clamping block, 320-Locking screw.

[0023] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0026] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; 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 the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0028] Example

[0029] Reference Figures 1-6 This embodiment provides a cutting tool for machining internal grooves, including a tool holder 100, a cutting head 200, and a locking mechanism 300. One end of the tool holder 100 is provided with a mounting groove. The cutting head 200 includes an integrally connected cutting pad 210 and a cutting blade 220, with one section of the cutting pad 210 disposed in the mounting groove. The locking mechanism 300 is disposed on the tool holder 100 and is used to press one section of the cutting pad 210 into the mounting groove.

[0030] In this embodiment, the cutter pad 210 and the blade 220 are designed as an integral cutter head 200, thereby enhancing the structural strength of the blade 220. When the blade 220 needs to be replaced, the integral cutter head 200 can be replaced directly. Furthermore, a section of the cutter pad 210 is pressed into the mounting groove by the locking mechanism 300. The cutter pad 210 has a large thickness and width, so a larger pressing area can be used to increase the locking force, rather than directly locking the blade 220. This not only improves the service life of the blade 220, but also reduces the impact of the blade 220 loosening on the processing quality.

[0031] As an optional implementation, the blade 220 includes a first base 221 and a first cutting groove 222. The first base 221 is integrally connected to the blade pad 210, and the thickness of the first base 221 is equal. The first cutting groove 222 is integrally connected to one side of the first base 221, and the first cutting groove 222 is integrally connected to the blade pad 210. The thickness of the first cutting groove 222 decreases in the direction away from the first base 221.

[0032] In this embodiment, the first grooving portion 222 is the cutting part and also the part where the blade is prone to breakage. Traditional blade structures all adopt a uniform thickness structure, but the blade thickness is generally thin, which can easily lead to blade damage in processes such as rough machining of internal grooves. Therefore, here a thicker first base 221 is used to provide back force support for the first grooving portion 222 during machining, and the first grooving portion 222 adopts a variable thickness design, which can greatly increase the strength of the first grooving portion 222 and improve its service life, thus making it suitable for rough machining of internal grooves with large diameters or deep grooves.

[0033] As another optional implementation, the blade 220 includes a second base 223 and a second cutting groove 224. The second base 223 is integrally connected to the blade pad 210, and the thickness of the second base 223 is equal. The second cutting groove 224 is integrally connected to the end of the second base 223 away from the blade pad 210. The cross-section of the second cutting groove 224 is arc-shaped, and a section of oblique cut surface 225 is provided on the top of the second cutting groove 224.

[0034] In this embodiment, when it is necessary to machine a chamfered transition part into the inner groove, a finishing tool is required. Therefore, a blade 220 structure with a second cutting section 224 having an arc-shaped top surface can be used. Considering the narrow space structure inside the inner groove, a section of oblique cutting surface 225 is also provided at the top of the second cutting section 224 to avoid interference and to expand the applicability of the blade 220.

[0035] As an optional implementation, a thickened portion 230 is provided at the connection position between the blade 220 and the blade pad 210. Since the blade 220 and the blade pad 210 are integrally connected and have an included angle, the connection position between the blade 220 and the blade pad 210 is prone to breakage during processing due to the stress structure. Therefore, by providing a thickened portion 230 at the connection position, the structural strength of the connection position is increased and the risk of breakage is reduced.

[0036] It should be noted that since the blade 220 and the blade pad 210 have different thicknesses, the thickened part 230 can adopt a variable thickness design to effectively connect and transition the blade 220 and the blade pad 210 of different thicknesses.

[0037] As an alternative implementation, the back of the blade pad 210 is provided with a relief groove 211, which is located on the side of the blade pad 210 near the blade 220; wherein, the back of the blade pad 210 is the side of the blade pad 210 that is away from the blade 220.

[0038] In this embodiment, after the blade 220 processes the inner groove to a certain depth, one end of the blade 220 and the tool pad 210 need to continue to extend into it. There may be a situation where the space inside the groove is small due to the irregular shape of the inner groove. Because of the design of opening a clearance groove 211 on the back of the tool pad 210, the risk of interference can be effectively reduced and smooth processing can be ensured. This design is applicable to the processing of various irregular inner grooves.

[0039] As an optional implementation, the included angle between the blade pad 210 and the blade 220 is θ, and the range of θ is 90° to 150°.

[0040] In this embodiment, in order to adapt to the machining of irregular inner grooves, the cutting tool 220 may need to be inserted into the inner groove at different angles for machining. Therefore, various corresponding cutting heads 200 can be prefabricated within the angle θ between the cutting pad 210 and the cutting tool 220. The corresponding cutting head 200 can be selected as needed to form a combination tool for use, which is more flexible. In addition, the cutting tool 220 with its own angle is used for machining, so there is no need to change the original angle of the cutting pad 210, which reduces the machining difficulty.

[0041] As an optional implementation, the locking mechanism 300 includes a clamping block 310 and a locking screw 320. The clamping block 310 is used to clamp the blade pad 210. The locking screw 320 is threaded through the clamping block 310, and the blade shank 100 has a threaded hole that engages with the locking screw 320.

[0042] In this embodiment, when clamping is required, the blade pad 210 is installed in the mounting groove of the blade rod 100, and then the clamping block 310 is pressed against the surface of the blade pad 210. The locking screw 320 is screwed into the screw hole of the blade rod 100, thereby firmly fixing one end of the clamping block 310 to the blade rod 100, and the other end of the clamping block 310 firmly presses against the blade pad 210. The clamping block 310 locking structure can increase the contact area with the blade pad 210, thereby increasing the locking force, making the locking more reliable and stable, and less prone to loosening.

[0043] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A cutting tool for machining internal grooves, characterized in that, include: A tool holder, one end of which has a mounting groove; The cutter head includes an integrally connected cutter pad and a blade, with one section of the cutter pad disposed within the mounting groove; A locking mechanism is provided on the tool holder and is used to press one part of the tool pad into the mounting groove.

2. The cutting tool for machining internal grooves as described in claim 1, characterized in that, The blade includes: A first substrate, which is integrally connected to the blade pad, has an equal thickness; The first cutting portion is integrally connected to one side of the first substrate, and the first cutting portion is integrally connected to the blade pad. The thickness of the first cutting portion decreases in the direction away from the first substrate.

3. The cutting tool for machining internal grooves as described in claim 1, characterized in that, The blade includes: The second substrate is integrally connected to the blade pad, and the thickness of the second substrate is equal. The second cutting groove is integrally connected to the end of the second substrate away from the blade pad. The cross-section of the second cutting groove is arc-shaped, and a beveled surface is provided at the top of the second cutting groove.

4. A cutting tool for machining internal grooves as described in any one of claims 1-3, characterized in that, The connection between the blade and the blade pad is provided with a thickened section.

5. A cutting tool for machining internal grooves as described in any one of claims 1-3, characterized in that, The back of the blade pad is provided with a relief groove, which is located on the side of the blade pad near the blade; wherein, the back of the blade pad is the side of the blade pad that is away from the blade.

6. A cutting tool for machining internal grooves as described in any one of claims 1-3, characterized in that, The included angle between the blade pad and the blade is θ, and the range of θ is 90° to 150°.

7. The cutting tool for machining internal grooves as described in claim 1, characterized in that, The locking mechanism includes: A clamping block, used to clamp the blade pad; A locking screw, the locking screw having a thread that passes through the clamping block, and a threaded hole on the knife bar that mates with the locking screw.

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