Inner hole turning blade
By designing the cutting groove, guide block, and multi-faceted flow structure of the internal turning insert, the problem of chip removal was solved, achieving efficient internal hole machining, avoiding downtime, and improving machining efficiency and quality.
Patent Information
- Application Number
- CN202520159716.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-01-23
AI Technical Summary
In internal turning, chips are difficult to break and remove effectively, resulting in low machining efficiency and easy entanglement on the workpiece, tool or fixture, affecting surface quality.
Design an internal turning insert comprising a cutting groove, a guide block, and multiple flow and chip removal surfaces. After the chips break, they are fragmented by staggered cutting blocks and quickly discharged using a variety of flow and chip removal structures, thus avoiding chip accumulation.
This improves the efficiency of internal hole machining, avoids the need for mid-process shutdown to clean up chips, and ensures that the machining quality is not affected.
Smart Images
Figure CN223888966U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of cutting and machining technology, and in particular relates to an internal turning tool. Background Technology
[0002] In traditional turning operations, the chips generated by the cutting tool on the workpiece should be naturally separated and removed from the rotating workpiece. If chips remain between the cutting tool and the workpiece, they will affect the surface of the rotating workpiece. Chip handling in internal turning has always been a major challenge in machining. During internal machining, chips are difficult to break off and are prone to getting tangled on the workpiece, cutting tool, or fixture. As machining continues, the chips accumulate, easily scratching the machined surface and affecting the surface quality of the workpiece. They can even chip the cutting tool. Therefore, in traditional internal machining, operators often have to stop the machine midway to clean up the chips, which seriously affects machining efficiency. The chip handling problem is even more prominent when precision turning of internal holes.
[0003] To prevent the flow of chips from damaging the machined surface, most internal turning tools in the prior art are equipped with chip guide grooves to guide the flow of chips and transfer the generated chips from the cutting area by deforming, splitting or breaking them into relatively short chips. However, after the chips split or break in the prior art, the chip removal method remains unchanged, and the chips are prone to accumulate and blockage. Utility Model Content
[0004] The purpose of this invention is to provide an internal turning insert that allows chips to be discharged after breaking, and during the discharge process, the chips are discharged in multiple directions and at a fast speed, avoiding the need to stop the machine midway to clean up chips and improving processing efficiency.
[0005] To achieve the above objectives, the present invention provides the following technical solution:
[0006] An internal turning insert includes a turning tool body. A central mounting hole is provided at the geometric center of the turning tool body. A cutting groove is provided on one side of the central mounting hole. A cutting edge is provided near the edge of the turning tool body near the cutting groove. A cutting surface is connected to the cutting edge near the cutting groove. A guide block is fixed in the middle of the cutting groove. A transition surface is provided between the guide block and the cutting groove. The guide block divides the cutting groove into a front guide groove and a rear guide groove. The front guide groove is located near the cutting surface.
[0007] Furthermore, a first guide surface and a second guide surface are provided between the two sides of the cutting groove and the upper surface of the turning tool body. The first guide surface and the second guide surface are smoothly transitioned, and the curvature of the second guide surface is greater than that of the first guide surface.
[0008] Furthermore, the rear guide groove is provided with a first chip removal surface, a second chip removal surface and a third chip removal surface, which are connected sequentially and smoothly transitioned.
[0009] Furthermore, a V-shaped angle is formed between the first chip removal surface and the second chip removal surface. One end of the first chip removal surface is connected to the transition surface on the guide block, and the side of the first chip removal surface away from the transition surface is inclined downward toward the second chip removal surface.
[0010] Furthermore, the second chip removal surface is inclined upward away from the first chip removal surface, and after the second chip removal surface is inclined, it is connected to the third chip removal surface. The side of the third chip removal surface away from the second chip removal surface is connected to the upper surface of the turning tool body.
[0011] Furthermore, cut blocks are fixed on the first guide surface, and the cut blocks on the two first guide surfaces are staggered.
[0012] In summary, the beneficial technical effects of this utility model are as follows: the internal turning insert allows chips to be discharged after breakage, and the two staggered cutting blocks result in higher chip fragmentation and easier discharge. At the same time, multiple guide surfaces and chip removal surfaces are provided during the discharge process, resulting in diverse chip discharge directions. The chip removal surface utilizes an inclined and concave structure to achieve fast chip discharge speed, and the guide blocks prevent chips from accumulating again on the cutting surface, thus not affecting the machining quality. It also avoids the need to stop the machine midway to clean chips, thereby improving machining efficiency. Attached Figure Description
[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification, but do not constitute a limitation thereof. In the drawings:
[0014] Figure 1 This is a schematic diagram of the structure of an internal turning tool in this embodiment;
[0015] Figure 2 This is an internal turning tool of this embodiment. Figure 1 Another perspective illustration.
[0016] In the figure: 1. Turning tool body; 2. Center mounting hole; 3. Cutting groove; 4. Cutting edge; 5. Cutting surface; 6. Guide block; 7. Transition surface; 8. Front guide groove; 9. Rear guide groove; 10. First guide surface; 11. Second guide surface; 12. First chip removal surface; 13. Second chip removal surface; 14. Third chip removal surface; 15. Cutting block. Detailed Implementation
[0017] The present invention will be further described in detail below with reference to the accompanying drawings.
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.
[0019] Please see Figure 1-2 The present invention provides a technical solution: an internal turning insert, comprising a turning tool body 1, a central mounting hole 2 at the geometric center of the turning tool body 1, a cutting groove 3 on one side of the central mounting hole 2, a cutting edge 4 near the edge of the turning tool body 1 in the cutting groove 3, a cutting surface 5 connected to the cutting edge 4 near the cutting groove 3, a guide block 6 fixed in the middle of the cutting groove 3, a transition surface 7 between the guide block 6 and the cutting groove 3, the guide block 6 dividing the cutting groove 3 into a front guide groove 8 and a rear guide groove 9, the front guide groove 8 being located near the cutting surface 5.
[0020] In this embodiment, the turning tool body 1 is integrally machined to form the internal cutting groove 3, the cutting edge 4, and the internal guide block 6.
[0021] Among them, a first guide surface 10 and a second guide surface 11 are provided between the two sides of the cutting groove 3 and the upper surface of the turning tool body 1. The first guide surface 10 and the second guide surface 11 are smoothly transitioned, and the curvature of the second guide surface 11 is greater than that of the first guide surface 10.
[0022] Meanwhile, a cutting block 15 is fixed on the first guide surface 10. The cutting blocks 15 on the two first guide surfaces 10 are staggered and integrated with the first guide surface 10, and then integrated with the turning tool body 1.
[0023] Furthermore, during the cutting process, the chips move along the cutting groove 3. Simultaneously, after the chips accumulate, they are diverted along the first guide surfaces 10 on both sides of the cutting groove 3. During the diversion process, they come into contact with the cutting blocks 15. Since the cutting blocks 15 and the turning tool body 1 are integrated, the cutting blocks 15 rotate with the turning tool body 1. Then, the two staggered cutting blocks 15 cut the chips that have passed through the first guide surface 10, so that the chips are cut into small fragments. The cut chips are then discharged through the second guide surface 11, or discharged along the rear guide groove 9 after passing through the guide block 6. Due to the division of the guide block 6, the chips are further prevented from staying at the cutting surface 5.
[0024] Specifically, the rear guide groove 9 is provided with a first chip removal surface 12, a second chip removal surface 13 and a third chip removal surface 14, which are connected in sequence and smoothly transitioned.
[0025] A V-shaped angle is formed between the first chip removal surface 12 and the second chip removal surface 13. One end of the first chip removal surface 12 is connected to the transition surface 7 on the guide block, and the side of the first chip removal surface 12 away from the transition surface 7 is inclined downward toward the second chip removal surface 13.
[0026] The second chip removal surface 13 is inclined upward away from the first chip removal surface 12. After the second chip removal surface 13 is inclined, it is connected to the third chip removal surface 14. The side of the third chip removal surface 14 away from the second chip removal surface 13 is connected to the upper surface of the turning tool body 1.
[0027] The first chip removal surface 12 and the second chip removal surface 13 are set at an angle, which facilitates chip accumulation. At the same time, the second chip removal surface 13 is inclined toward the third chip removal surface 14, which effectively increases the chip removal speed during the chip removal process, thus making it easier and faster to remove chips.
[0028] The working principle of this utility model is as follows: A cutting groove 3 is provided on the turning tool body 1. The cutting groove 3 is inclined and used for chip discharge. During the chip discharge process, long chips are cut into short segments or fragments after passing through two staggered cutting blocks 15. They are then discharged through the second guide surface 11 or through the guide block 6. After passing through the second guide surface 11, they can be directly discharged. After passing through the guide block 6, they can stay between the second chip removal surface 13 and the third chip removal surface 14. The guide block 6 prevents the chips from returning to the cutting surface 5 and accumulating. At the same time, the chips that accumulate between the second chip removal surface 13 and the third chip removal surface 14 are continuously accumulated and then discharged through the inclined third chip removal surface 14 at an accelerated speed.
[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0030] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.
Claims
1. An internal turning insert, characterized in that, The tool includes a turning tool body (1), a central mounting hole (2) is provided at the geometric center of the turning tool body (1), a cutting groove (3) is provided on one side of the central mounting hole (2), a cutting edge (4) is provided near the edge of the turning tool body (1) in the cutting groove (3), a cutting surface (5) is connected to the cutting edge (4) near the cutting groove (3), a guide block (6) is fixed in the middle of the cutting groove (3), a transition surface (7) is provided between the guide block (6) and the cutting groove (3), the guide block (6) divides the cutting groove (3) into a front guide groove (8) and a rear guide groove (9), and the front guide groove (8) is set near the cutting surface (5).
2. The internal turning tool according to claim 1, characterized in that, The cutting groove (3) is provided with a first guide surface (10) and a second guide surface (11) between its two sides and the upper surface of the turning tool body (1). The first guide surface (10) and the second guide surface (11) are smoothly transitioned, and the curvature of the second guide surface (11) is greater than that of the first guide surface (10).
3. The internal turning insert according to claim 1, characterized in that, The rear guide groove (9) is provided with a first chip removal surface (12), a second chip removal surface (13) and a third chip removal surface (14), which are connected in sequence and smoothly transitioned.
4. The internal turning insert according to claim 3, characterized in that, The first chip removal surface (12) and the second chip removal surface (13) form a V-shaped angle. One end of the first chip removal surface (12) is connected to the transition surface (7) on the guide block. The side of the first chip removal surface (12) away from the transition surface (7) is inclined downward toward the second chip removal surface (13).
5. The internal turning insert according to claim 3, characterized in that, The second chip removal surface (13) is inclined upward away from the first chip removal surface (12). After the second chip removal surface (13) is inclined, it is connected to the third chip removal surface (14). The side of the third chip removal surface (14) away from the second chip removal surface (13) is connected to the upper surface of the turning tool body (1).
6. The internal turning tool according to claim 2, characterized in that, A cutting block (15) is fixed on the first guide surface (10), and the cutting blocks (15) on the two first guide surfaces (10) are staggered.