Special-shaped groove non-standard cutter structure
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGLONG PRECISION IND FUZHOU
- Filing Date
- 2025-08-11
- Publication Date
- 2026-07-10
AI Technical Summary
In the existing technology, non-standard turning tools used for machining narrow irregular grooves are prone to local stress concentration, which leads to tool damage and short tool life.
A non-standard tool structure with irregular grooves was designed. The cutting tool insert has a rhomboid structure. Through the specific arrangement of the rhomboid sides and the matching design of the groove, it is ensured that the front wall of the cutting tool insert is flush with the folded edge when installed. The irregular groove is machined by utilizing the included angle and sharp end of the rhomboid sides, avoiding local stress concentration.
This improved the tool life when machining irregular grooves, reduced the probability of tool damage, and achieved stable cutting operations.
Smart Images
Figure CN224475616U_ABST
Abstract
Description
Technical fields:
[0001] This utility model relates to a machining tool structure, and in particular to a non-standard tool structure for machining narrow irregular grooves. Background technology:
[0002] Currently, when machining irregular grooves, standard turning tools are usually used (to machine irregular grooves through CNC technology), or non-standard turning tools with the same shape and size as the irregular grooves are specially made. However, for irregular grooves with narrow dimensions, non-standard turning tools with the same shape and size as the irregular grooves are prone to local stress concentration during use, making these turning tools easy to be damaged and have a short lifespan. Utility model content:
[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a non-standard tool structure with irregular grooves. The mechanism is reasonably designed and can realize the local machining of irregular grooves and improve the service life of the cutting tool.
[0004] This utility model relates to a non-standard tool structure with an irregular groove, comprising a lathe tool body and a recessed groove on the tool body for placing the tool insert. The tool insert has four rhomboid edges forming a rhombus. The two rhomboid edges on the first side of the tool insert intersect to form the sharp point of the first end of the tool insert. The two rhomboid edges on the second side of the tool insert can be extended to virtually intersect. The angle between the first rhomboid edge on the second side of the tool insert and the front end edge forms the first bottom angle of the irregular groove to be machined. The side edge connected to the front end edge is parallel to the first rhomboid edge on the second side of the tool insert. The folded edge connected to the side edge is parallel to the front end edge and intersects with the second rhomboid edge on the second side of the tool insert. The sidewall of the recessed groove is in contact with the four rhomboid edges of the tool insert. When the tool insert is installed in the recessed groove, the front wall surface of the tool body is flush with the folded edge.
[0005] Preferably, the cutting tool insert has a through hole at its center, and a bolt that locks into the threaded hole passes through the through hole.
[0006] Preferably, the end of the settling tank is provided with a clearance hole.
[0007] Preferably, the bottom surface of the cutting tool insert is in contact with the bottom surface of the sinker, and the thickness of the cutting tool insert is greater than the depth of the sinker.
[0008] Preferably, a pressure plate is installed on the tool body of the lathe tool. The first end of the pressure plate is locked to the tool body by a bolt, and the second end of the pressure plate abuts against the upper surface of the tool insert.
[0009] This utility model's non-standard tool structure for irregular grooves employs the following: the angle between the first rhomboid edge on the second side of the cutting tool insert and the front end edge forms the first bottom angle of the irregular groove to be machined; the side edge connected to the front end edge is parallel to the first rhomboid edge on the second side of the cutting tool insert; the folded edge connected to the side edge is parallel to the front end edge and intersects with the second rhomboid edge on the second side of the cutting tool insert; the side wall of the groove is in contact with the four rhomboid edges of the cutting tool insert; when the cutting tool insert is installed in the groove, the front wall surface of the cutting tool body is flush with the folded edge, thus enabling the angle between the first rhomboid edge on the second side of the cutting tool insert and the front end edge to be used to machine the first bottom angle of the irregular groove; and the second bottom angle of the irregular groove can be machined using the sharp point at the first end of the cutting tool insert, thereby realizing the machining of the irregular groove. Furthermore, the above structure of the front end edge, side edge, and folded edge makes the cutting tool less prone to damage during cutting. Attached image description:
[0010] Figure 1 This is a front view of the cutting tool of this utility model;
[0011] Figure 2 yes Figure 1 Front view of the cutting tool insert;
[0012] Figure 3 yes Figure 1 Front view of the cutting tool body of a medium lathe;
[0013] Figure 4 This is a schematic diagram of the structure of the cutting tool and the groove to be machined in this utility model;
[0014] Figure 5 This is a front view of the lathe tool insert previously designed and manufactured by the applicant;
[0015] Figure 6 This is a dimensional drawing of the cutting tool insert for this utility model;
[0016] Where A1 is the workpiece to be processed, and A2 is the groove to be processed. Detailed implementation method:
[0017] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be pointed out that the following detailed description is exemplary and intended to provide further explanation of the present application; unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0018] The non-standard tool structure with irregular groove of this utility model includes a lathe tool body 1 and a recessed groove 3 provided on the lathe tool body 1 for placing the lathe tool insert 2. The shape of the recessed groove 3 is basically consistent with the shape of the lathe tool insert 2 embedded in the recessed groove. The difference is that the end of the recessed groove 3 is provided with a relief hole 14.
[0019] The cutting tool insert 2 has four rhomboid edges forming a rhombus. The two rhomboid edges 4 on the first side of the cutting tool insert intersect to form the sharp point of the first end of the cutting tool insert. The two rhomboid edges on the second side of the cutting tool insert can be extended to virtually intersect. The angle formed by the first rhomboid edge 5 on the second side of the cutting tool insert and the front end edge 6 is the same as the shape and size of the bottom corner of the first groove of the irregular groove to be processed. The side edge 7 connected to the front end edge 6 is parallel to the first rhomboid edge 4 on the second side of the cutting tool insert (the angle formed by the front end edge 6 and the side edge 7 is different from the shape and size of the bottom corner of the second groove of the irregular groove). The folded edge 8 connected to the side edge 7 is parallel to the front end edge 6 and intersects with the second rhomboid edge 9 on the second side of the cutting tool insert. The side wall 10 of the recessed groove is in contact with the four rhomboid edges of the cutting tool insert (that is, the shape of the side wall 10 of the recessed groove is the same as the shape and size of the four rhomboid edges of the cutting tool insert). When the cutting tool insert is installed in the recessed groove, the front wall surface 11 of the cutting tool body is flush with the folded edge 8.
[0020] In order to lock the cutting tool insert, the cutting tool insert has a through hole 12 in the center, and a threaded hole 13 corresponding to the through hole is provided at the bottom of the groove 3. A bolt is threaded through the through hole and locked to the threaded hole 13.
[0021] In order to achieve the machining of the countersink 3, the end of the countersink 3 is provided with a clearance hole 14. When machining the countersink, it is difficult for a milling cutter to machine the position in the countersink 3 corresponding to the sharp part of the first side of the cutting tool insert. Therefore, in order to avoid the sharp part of the first side of the cutting tool insert in the countersink, a clearance hole 14 is provided at the end of the countersink 3. The diameter of the clearance hole 14 is 5-30 mm.
[0022] The bottom surface of the cutting tool insert is in contact with the bottom surface of the countersink. The thickness of the cutting tool insert is greater than the depth of the countersink. It is locked by bolts passing through the through hole 12 and the threaded hole.
[0023] To better stabilize the cutting tool insert, a pressure plate 15 is installed on the cutting tool body. The first end of the pressure plate is locked to the cutting tool body by a bolt, and the second end of the pressure plate abuts against the upper surface of the cutting tool insert.
[0024] This utility model's non-standard tool structure for irregular grooves employs the following: the angle between the first rhombus edge on the second side of the lathe tool insert and the front end edge forms the first bottom angle of the irregular groove to be machined; the side edge connected to the front end edge is parallel to the first rhombus edge on the second side of the lathe tool insert; the folded edge connected to the side edge is parallel to the front end edge and intersects with the second rhombus edge on the second side of the lathe tool insert; the side wall of the recessed groove is in contact with the four rhombus edges of the lathe tool insert; when the lathe tool insert is installed in the recessed groove, the front wall surface of the lathe tool body is flush with the folded edge, thereby enabling the angle between the first rhombus edge on the second side of the lathe tool insert and the front end edge to be used to machine the first bottom angle of the irregular groove; and the second bottom angle of the irregular groove can be machined using the sharp point of the first end of the lathe tool insert (which can be the sharp point of the first end of another lathe tool), thus realizing the machining of the irregular groove. Furthermore, the above structure of the front end edge, side edge, and folded edge makes the lathe tool less prone to damage during cutting.
[0025] Before designing the cutting tool insert for this application, the applicant designed and used the cutting tool insert shown in the figure. The front end of the cutting tool insert matches the shape of the groove A2 to be machined on the workpiece A1. It is very easy to break during use, which results in a short service life of the cutting tool. After inspection, it was found that the vulnerable part is located at the position of the dotted line in the figure. Therefore, through repeated trials, the applicant adopted the aforementioned cutting tool insert shape, so that the breaking phenomenon rarely occurs during processing and use.
[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. 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 non-standard cutting tool structure with irregular grooves, characterized in that: The tool includes a lathe tool body and a recessed groove on the tool body for placing the tool insert. The tool insert has four rhomboid edges forming a rhombus. The two rhomboid edges on the first side of the tool insert intersect to form the sharp point of the first end of the tool insert. The two rhomboid edges on the second side of the tool insert can be extended to virtually intersect. The first rhomboid edge on the second side of the tool insert forms the first bottom angle of the groove to be machined with the front end edge. The side edge connected to the front end edge is parallel to the first rhomboid edge on the second side of the tool insert. The folded edge connected to the side edge is parallel to the front end edge and intersects with the second rhomboid edge on the second side of the tool insert. The sidewall of the recessed groove is in contact with the four rhomboid edges of the tool insert. When the tool insert is installed in the recessed groove, the front wall surface of the tool body is flush with the folded edge.
2. The non-standard tool structure with irregular grooves according to claim 1, characterized in that: The sink has a threaded hole, and the center of the cutting tool insert has a through hole, through which a bolt that locks with the threaded hole is inserted.
3. The non-standard tool structure with irregular grooves according to claim 1, characterized in that: The end of the settling tank is provided with a clearance hole.
4. The non-standard tool structure with irregular grooves according to claim 1, characterized in that: The bottom surface of the cutting tool insert is in contact with the bottom surface of the sinker, and the thickness of the cutting tool insert is greater than the depth of the sinker.
5. The non-standard tool structure with irregular grooves according to claim 4, characterized in that: A pressure plate is installed on the tool body of the lathe tool. The first end of the pressure plate is locked to the tool body by a bolt, and the second end of the pressure plate abuts against the upper surface of the tool insert.