A ceramic blade for fine turning

Abstract

The utility model discloses a kind of fine turning ceramic blades, it is related to fine machining cutter technical field, including tool body, located in the rake face of tool body front part, the main blade formed in the edge of tool body side wall, the cutting groove being opened in the junction of rake face and main blade and with the edge parallel of tool body and the connecting hole being opened in the middle part of tool body;Tool body side wall is formed with the raised micro tooth blade reinforcing part, the extension direction of micro tooth blade reinforcing part is parallel with the blade part of main blade, micro tooth blade reinforcing part is composed of multiple protruding and continuous tooth blocks, and the tooth end cutting surface of micro tooth blade reinforcing part and the cutting surface of main blade are located in the same face, rake face is the arc-shaped rake face that is protruding to front end, the utility model is improved to the blade structure, can play more comprehensive anti-impact protection effect to the fine turning ceramic blade, greatly reduce the probability that the fine turning ceramic blade is cracked when being impacted, reach the effect of prolonging the service life of fine turning ceramic blade.

Description

Technical Field

[0001] This utility model relates to the field of precision machining tools, and in particular to a precision turning ceramic insert. Background Technology

[0002] Boring inserts are a type of turning tool, commonly used for machining round bar-shaped workpieces; they are tools used for finishing workpiece blanks that have undergone rough machining.

[0003] A search revealed that patent document CN218283769U discloses a fully ground metal-ceramic boring bar, comprising a boring bar body formed by grinding. The boring bar body is polygonal and includes at least three boring bar cutting edges, each corresponding to a different angle: including an upwardly oriented upper cutting surface and a set of side faces corresponding to one of the upper cutting surfaces to form the boring bar cutting edge. Multiple boring bar bodies are combined to form a multi-position integrated boring bar structure. This fully ground metal-ceramic boring bar, through its multi-position integrated boring bar structure, can meet the processing needs of different processing occasions, reduce the waste of production resources caused by multiple boring bar setups, and reduce the impact of tool changing processes on production efficiency, facilitating efficient production and cost optimization for enterprises.

[0004] Based on the above search and combined with existing technology, it was found that due to the brittle nature of ceramic materials, existing ceramic cutting tools are prone to brittle fracture when subjected to impact, which reduces the service life of ceramic cutting tools. Therefore, there is a need for a precision-machined ceramic cutting tool. Utility Model Content

[0005] The purpose of this application is to provide a precision machining ceramic insert to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a precision turning ceramic insert, comprising a cutter body, a rake face located at the front of the cutter body, a main cutting edge formed at the edge of the side wall of the cutter body, a cutting groove formed at the junction of the rake face and the main cutting edge and parallel to the edge of the cutter body, and a connecting hole formed in the middle of the cutter body.

[0007] The blade body has a raised micro-toothed edge reinforcement on its side wall. The extension direction of the micro-toothed edge reinforcement is parallel to the cutting edge of the main blade. The micro-toothed edge reinforcement is composed of multiple protruding and continuous tooth blocks, and the cutting surface of the tooth tip of the micro-toothed edge reinforcement is located in the same plane as the cutting surface of the main blade.

[0008] Preferably, the front cutting face is an arc-shaped cutting face that bulges towards the front end. The arc-shaped cutting face is composed of multiple arc-shaped walls with different angles. The multiple arc-shaped walls correspond to multiple edges at the junction of the front cutting face and the cutting body. The thickness of the arc-shaped cutting face near the middle of the connecting hole is greater than the thickness at the edge of the arc-shaped cutting face.

[0009] Preferably, a microtextured groove is provided on the rake face. The microtextured groove is located at the edge where the rake face meets the side wall of the cutter body. The extension direction of the microtextured groove is parallel to the horizontal tangent direction of the main cutting edge. Multiple sets of microtextured grooves are provided and distributed along the peripheral edge of the rake face.

[0010] Preferably, a first double-arc wall and a second double-arc wall are formed at the intersection of the cutting groove with the tool body and the rake face. The lower sections of the first double-arc wall and the second double-arc wall are both formed into concave arc-shaped walls, and the upper sections of the first double-arc wall and the second double-arc wall are both formed into convex arc-shaped walls.

[0011] Preferably, a damping hole and a damping groove are provided inside the connecting hole. The damping hole is provided at the front part of the connecting hole near the front face of the rake. Multiple damping holes are provided and are irregularly distributed around the axis of the connecting hole.

[0012] The damping groove is located at the rear of the connecting hole away from the rake face. Multiple damping grooves are also provided and are irregularly distributed around the circumference of the connecting hole axis. The extension direction of the damping groove is parallel to the extension direction of the connecting hole axis. Multiple damping grooves and multiple damping holes are staggered in the axial direction of the connecting hole.

[0013] Preferably, a toughening layer is formed on the inner side of the cutter body. The toughening layer is located around the connecting hole. The toughening layer is an annular layer made of toughening ceramic phase and integrally formed with the cutter body. The damping hole or damping groove penetrates the toughening layer radially and extends into the cutter body.

[0014] In summary, the technical effects and advantages of this utility model are as follows:

[0015] 1. In this utility model, by providing a micro-toothed edge reinforcement on the rear side of the main cutting edge in the cutting direction, the main cutting edge and the micro-toothed edge reinforcement simultaneously contact the cutting arc surface of the workpiece. The teeth of the micro-toothed edge reinforcement can disperse the stress on the main cutting edge, thereby reducing the probability of main cutting edge breakage caused by stress concentration. By setting the rake face as an arc-shaped cutting face and adapting the arc-shaped cutting face to multiple edges of the tool body to form a multi-faceted arc structure, the stress can be dispersed to the side along the arc-shaped cutting face when any part of the rake face is impacted, thereby reducing the probability of damage to the rake face when impacted. Through the improvement of the insert structure, a more comprehensive impact protection effect can be achieved for the precision turning ceramic insert, greatly reducing the probability of cracks in the precision turning ceramic insert when impacted, and achieving the effect of extending the service life of the precision turning ceramic insert.

[0016] 2. In this utility model, by setting the micro-textured groove, the micro-textured groove can further provide a buffering effect when the front cutting face is impacted; by setting the damping hole and damping groove, the internal resonance of the cutting body can be interfered when the cutting body is impacted, thereby reducing the probability of the cutting body cracking after being impacted. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure in this embodiment;

[0019] Figure 2 This is a schematic diagram of the main view structure in this embodiment;

[0020] Figure 3 This is a cross-sectional view in this embodiment.

[0021] In the figure: 1. Tool body; 2. Rake face; 21. Arc-shaped tool face; 3. Main cutting edge; 4. Cutting groove; 41. First double arc wall; 42. Second double arc wall; 5. Connecting hole; 51. Vibration damping hole; 52. Vibration damping groove; 6. Microtexture groove; 7. Microtooth edge reinforcement; 8. Toughening layer. Detailed Implementation

[0022] 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.

[0023] Example: Reference Figures 1-3 The ceramic cutting insert shown includes a cutting body 1, a rake face 2 located at the front of the cutting body 1, a main cutting edge 3 formed at the edge of the side wall of the cutting body 1, a cutting groove 4 formed at the junction of the rake face 2 and the main cutting edge 3 and parallel to the edge of the cutting body 1, and a connecting hole 5 formed in the middle of the cutting body 1.

[0024] The sidewall of the blade body 1 has a raised micro-toothed edge reinforcement 7. The extension direction of the micro-toothed edge reinforcement 7 is parallel to the cutting edge of the main blade 3. The micro-toothed edge reinforcement 7 is composed of multiple protruding and continuous tooth blocks, and the cutting surface of the tooth tip of the micro-toothed edge reinforcement 7 is located in the same plane as the cutting surface of the main blade 3.

[0025] Based on the above structure, a micro-tooth reinforcement 7 is provided on the rear side of the main cutting edge 3 in the cutting direction, so that the main cutting edge 3 and the micro-tooth reinforcement 7 simultaneously contact the cutting arc surface of the workpiece. The tooth blocks of the micro-tooth reinforcement 7 can disperse the stress on the main cutting edge 3, thereby reducing the probability of the main cutting edge 3 breaking due to stress concentration, and thus extending the service life of the main cutting edge 3.

[0026] Furthermore, the front cutting face 2 is an arc-shaped cutting face 21 that protrudes towards the front end. The arc-shaped cutting face 21 is composed of multiple arc-shaped walls with different angles. The multiple arc-shaped walls correspond to multiple edges at the junction of the front cutting face 2 and the cutter body 1. The thickness of the arc-shaped cutting face 21 near the middle of the connecting hole 5 is greater than the thickness at the edge of the arc-shaped cutting face 21.

[0027] By setting the rake face 2 as an arc-shaped cutter face 21 and adapting the arc-shaped cutter face 21 to multiple edges of the cutter body 1 to form a multi-faceted arc structure, the stress can be distributed laterally along the arc-shaped cutter face 21 when any part of the rake face 2 is impacted, thereby reducing the probability of damage to the rake face 2 when impacted and extending the service life of the rake face 2.

[0028] Furthermore, a micro-textured groove 6 is provided on the front face 2. The micro-textured groove 6 is located at the edge where the front face 2 meets the side wall of the cutter body 1. The extension direction of the micro-textured groove 6 is parallel to the horizontal tangent direction of the main cutting edge 3. Multiple sets of micro-textured grooves 6 are provided and distributed along the peripheral edge of the front face 2.

[0029] By setting the microtexture groove 6, when the rake face 2 is subjected to impact, the microtexture groove 6 can further provide a buffering effect and protect the rake face 2.

[0030] Furthermore, at the intersection of the cutting groove 4 with the tool body 1 and the rake face 2, a first double arc wall 41 and a second double arc wall 42 are formed. The lower sections of the first double arc wall 41 and the second double arc wall 42 are both concave arc walls, and the upper sections of the first double arc wall 41 and the second double arc wall 42 are both convex arc walls.

[0031] By setting the first double arc wall 41 and the second double arc wall 42, the chips generated during cutting can be guided, reducing the direct collision between the chips and the side wall of the cutting groove 4, thereby reducing the wear rate of the inner wall of the cutting groove 4 and allowing the chips to be discharged more smoothly.

[0032] Furthermore, a damping hole 51 and a damping groove 52 are provided on the inner side of the connecting hole 5. The damping hole 51 is provided at the front part of the connecting hole 5 near the front face 2. Multiple damping holes 51 are provided and are irregularly distributed around the axis of the connecting hole 5.

[0033] The damping groove 52 is opened at the rear of the connecting hole 5 away from the front face 2. Multiple damping grooves 52 are also opened and irregularly distributed around the axis of the connecting hole 5. The extension direction of the damping groove 52 is parallel to the extension direction of the axis of the connecting hole 5. Multiple damping grooves 52 and multiple damping holes 51 are staggered in the axial direction of the connecting hole 5.

[0034] By setting the damping hole 51 and the damping groove 52, the resonance inside the blade body 1 can be interfered when the blade body 1 is impacted, thereby reducing the probability of the blade body 1 cracking after being impacted, and also extending the service life of the blade body 1.

[0035] Furthermore, a toughening layer 8 is formed on the inner side of the blade body 1. The toughening layer 8 is located around the connecting hole 5. The toughening layer 8 (made of toughening ceramic phase in the prior art) is an annular layer integrally formed with the blade body 1. The damping hole 51 or the damping groove 52 both penetrate the toughening layer 8 radially and extend into the blade body 1. By setting the toughening layer 8, a tough annular layer with good toughness can be formed on the inner side of the blade body 1, especially at the connection, thereby reducing the possibility of the blade body 1 cracking at the connection and further playing a good protective role.

[0036] The working principle of this utility model is as follows: During daily use, by setting a micro-tooth reinforcement 7 on the rear side of the main cutting edge 3 in the cutting direction, the main cutting edge 3 and the micro-tooth reinforcement 7 simultaneously contact the cutting arc surface of the workpiece. The teeth of the micro-tooth reinforcement 7 can disperse the stress on the main cutting edge 3, thereby reducing the probability of the main cutting edge 3 breaking due to stress concentration. By setting the rake face 2 as an arc-shaped cutting face 21 and adapting the arc-shaped cutting face 21 to multiple edges of the tool body 1 to form a multi-faceted arc structure, the stress can be distributed along the arc when any part of the rake face 2 is impacted. The shaped cutting edge 21 is spread out to the side, thereby reducing the probability of damage to the front cutting edge 2 when it is impacted; the micro-textured groove 6 provides further buffering when the front cutting edge 2 is impacted; the damping hole 51 and damping groove 52 can interfere with the resonance inside the cutting edge 1 when it is impacted, thereby reducing the probability of the cutting edge 1 cracking after impact; the toughening layer 8 forms a tough annular layer on the inner side of the cutting edge 1, especially at the joint, thereby reducing the possibility of the cutting edge 1 cracking at the joint.

[0037] By improving the blade structure, the precision machining ceramic blade can achieve a more comprehensive impact protection effect, greatly reducing the probability of cracks when subjected to impact, and thus extending the service life of the precision machining ceramic blade.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. A precision machining ceramic insert, comprising a cutter body (1), a rake face (2) located at the front of the cutter body (1), a main cutting edge (3) formed at the edge of the side wall of the cutter body (1), a cutting groove (4) formed at the junction of the rake face (2) and the main cutting edge (3) and parallel to the edge of the cutter body (1), and a connecting hole (5) formed in the middle of the cutter body (1), characterized in that: The blade body (1) has a raised micro-tooth blade reinforcement part (7) on its side wall. The extension direction of the micro-tooth blade reinforcement part (7) is parallel to the blade of the main blade (3). The micro-tooth blade reinforcement part (7) is composed of multiple protruding and continuous tooth blocks, and the cutting surface of the tooth tip of the micro-tooth blade reinforcement part (7) is located in the same plane as the cutting surface of the main blade (3).

2. A finish machining ceramic insert according to claim 1, characterized in that: The front cutting surface (2) is an arc-shaped cutting surface (21) that protrudes towards the front end. The arc-shaped cutting surface (21) is composed of multiple arc-shaped walls with different angles. The multiple arc-shaped walls correspond to multiple edges at the junction of the front cutting surface (2) and the cutting body (1). The thickness of the arc-shaped cutting surface (21) near the middle of the connecting hole (5) is greater than the thickness at the edge of the arc-shaped cutting surface (21).

3. A finish machining ceramic insert according to claim 2, characterized in that: The rake face (2) is provided with a micro-textured groove (6). The micro-textured groove (6) is located at the edge where the rake face (2) and the side wall of the cutter body (1) meet. The extension direction of the micro-textured groove (6) is parallel to the horizontal tangent direction of the main cutting edge (3). Multiple sets of micro-textured grooves (6) are provided and distributed along the peripheral edge of the rake face (2).

4. A precision machining ceramic cutting tool according to claim 2, characterized in that: The cutting groove (4) intersects with the tool body (1) and the rake face (2) to form a first double arc wall (41) and a second double arc wall (42). The lower sections of the first double arc wall (41) and the second double arc wall (42) are both concave arc walls, and the upper sections of the first double arc wall (41) and the second double arc wall (42) are both convex arc walls.

5. A precision machining ceramic cutting tool according to any one of claims 1-4, characterized in that: The inner side of the connecting hole (5) is provided with a damping hole (51) and a damping groove (52). The damping hole (51) is opened at the front part of the connecting hole (5) near the front face (2). Multiple damping holes (51) are opened and are irregularly distributed around the axis of the connecting hole (5). The damping groove (52) is opened at the rear of the connecting hole (5) away from the front face (2). The damping groove (52) is also opened in multiple ways and is irregularly distributed around the axis of the connecting hole (5). The extension direction of the damping groove (52) is parallel to the extension direction of the axis of the connecting hole (5). The multiple damping grooves (52) and the multiple damping holes (51) are staggered in the axial direction of the connecting hole (5).

6. A precision machining ceramic cutting tool according to claim 5, characterized in that: A toughening layer (8) is formed on the inner side of the blade body (1). The toughening layer (8) is located around the connecting hole (5). The toughening layer (8) is an annular layer made of toughening ceramic phase and integrally formed with the blade body (1). The damping hole (51) or damping groove (52) both penetrate the toughening layer (8) radially and extend into the blade body (1).

Images