Metal ceramic cutter for turning

Abstract

The utility model discloses a metal ceramic cutter for turning, which comprises a cutter handle, a triangular blade and a limit pressing block, the cutter head part is provided with a first step surface and a second step surface, the triangular blade is arranged on the first step surface in an indexable manner, the surface of the triangular blade is coated with a ceramic coating, and the triangular blade is provided with three cutting edges along the circumferential direction. The cutting edge is of an angular structure, a chip breaker groove is formed in the tool face of the cutting edge, the limiting pressing block is arranged on the second step face, and the side wall of the limiting pressing block abuts against the triangular blade so as to limit the triangular blade to slide on the first step face. The triangular blade is arranged on the first step surface of the tool bit part, and the first included angle is formed between the first step surface and the horizontal plane, so that the triangular blade can be positioned at a proper cutting angle, the resistance is reduced, and the efficiency is improved; by arranging the ceramic coating, the hardness and wear resistance of the cutter can be improved; the limiting pressing block can prevent the blade from sliding, and the machining precision and stability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lathe tool field especially uses metal ceramic lathe tool for turning. BACKGROUND

[0002] Turning is a kind of metal cutting processing method, its principle is through the workpiece high-speed rotation on lathe main shaft, simultaneously uses the turning tool fixed on the tool rest along the specific trajectory to the rotating workpiece cutting, to process the shape and size of workpiece into the shape and precision required.

[0003] In prior art, when turning tool is in high-speed cutting or cutting force larger processing environment, blade is easy to loosen on the mounting surface due to vibration or uneven stress, leading to cutting position deviation, thereby affecting the processing stability and precision of product, secondly, a large amount of cutting chips will be generated in the turning process, these cutting chips will be accumulated on the processing surface, affect the processing quality of product and aggravate tool wear, in addition, with the diversification of processing material types, traditional tool is difficult to consider wear resistance and heat resistance, leading to tool wear speed fast, thermal fatigue phenomenon is obvious, thereby shortening the service life of tool.

[0004] Therefore, prior art has defects and needs improvement. INVENTION CONTENTS

[0005] The utility model solves the technical problems that provide a kind of metal ceramic lathe tool for turning with stable structure, not easy to wear, long service life.

[0006] To achieve this purpose, the utility model adopts the following technical scheme: a kind of metal ceramic lathe tool for turning, including handle, triangular blade and limit pressing block, the handle end is provided with the integrally formed tool head part, the tool head part has first step surface and second step surface;First step surface and horizontal plane form first included angle, the triangular blade can be indexed and set on the first step surface, and is locked and connected by first locking bolt with tool head part;

[0007] Triangular blade surface is coated with ceramic coating, the triangular blade is provided with three cutting edges along the circumference, the cutting edge is angle structure, the cutting edge is provided with chip breaker groove on the face, the chip breaker groove is arranged along the circumferential direction of cutting edge, the cutting edge is provided with inverted edge at the end of chip breaker groove;

[0008] Limit pressing block is arranged on the second step surface, and is locked and connected by second locking bolt with the tool head part, the limit pressing block side wall is in contact with the triangular blade, to limit the triangular blade sliding on the first step surface.

[0009] Adopting the technical scheme, the first included angle is 10-20° in the metal ceramic cutter for turning machining.

[0010] Adopting the technical scheme, the second included angle is 20-35° between the chip breaker groove and the horizontal plane in the metal ceramic cutter for turning machining.

[0011] Adopting the technical scheme, the cutting edge edge angle is 35-50° in the metal ceramic cutter for turning machining.

[0012] Adopting the technical scheme, the cutting edge edge angle is 35-50° in the metal ceramic cutter for turning machining.

[0013] The first support surface and the second support surface are arranged on the side wall of the triangular blade, the first support surface is in abutment with the first cutting surface, and the second support surface is in abutment with the second cutting surface.

[0014] Adopting the technical scheme, the first support surface and the second support surface are arranged on the side wall of the triangular blade, the first support surface is in abutment with the first cutting surface, and the second support surface is in abutment with the second cutting surface.

[0015] Adopting the technical scheme, the first support surface and the second support surface are arranged on the side wall of the triangular blade, the first support surface is in abutment with the first cutting surface, and the second support surface is in abutment with the second cutting surface.

[0016] Adopting the technical scheme, the first support surface and the second support surface are arranged on the side wall of the triangular blade, the first support surface is in abutment with the first cutting surface, and the second support surface is in abutment with the second cutting surface.

[0017] Compared with the prior art, the metal ceramic cutter for turning machining has the following beneficial effects:

[0018] The triangular blade is arranged on the first step surface of the tool head, and a first included angle is formed between the first step surface and the horizontal plane, so that the triangular blade is at a suitable cutting angle, thereby reducing the cutting resistance and effectively improving the cutting efficiency; the triangular blade is circumferentially provided with three cutting edges, and in combination with the indexable structure, the utilization rate of the triangular blade is improved, and the replacement frequency and production cost are reduced; the ceramic coating on the surface of the triangular blade can improve the hardness and wear resistance of the triangular blade, thereby reducing the friction between the triangular blade and the workpiece material and prolonging the service life of the cutter; the setting of the chamfer structure can enhance the mechanical strength of the cutting edge, avoid the phenomenon of cutting edge collapse, and improve the reliability of the cutter in high-strength cutting; in addition, the second step surface is arranged on the tool head and the limiting pressing block is installed, so that the triangular blade side wall can form close contact, the triangular blade is prevented from slipping due to vibration or cutting force, and the machining precision and efficiency of the cutter are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] The structures, proportions, sizes, etc. shown in the drawings of the present application are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the present application. Therefore, any modification of structure, change of proportion relationship or adjustment of size, which does not affect the functions and purposes of the present application, should still fall within the scope of the technical content disclosed by the present application.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0022] Figure 2 It is a schematic diagram of the overall structure of the present application;

[0023] Figure 3 It is a schematic diagram of the overall structure of the present application;

[0024] Figure 4 It is a schematic diagram of the overall structure of the present application;

[0025] Figure 5 It is a schematic diagram of the overall structure of the present application; DETAILED DESCRIPTION

[0026] In order to make the utility model purposes, features, advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely in the following drawings. Obviously, the embodiments described below are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0027] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0028] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 5 As shown in the figure, this utility model provides a metal-ceramic cutting tool for turning, including a tool holder 1, a triangular insert 2, and a limiting block 3. The end of the tool holder 1 is provided with an integrally formed tool head 10, which has a first stepped surface 101 and a second stepped surface 102. A first included angle α1 is formed between the first stepped surface 101 and the horizontal plane, and the first included angle α1 is 10-20°. The triangular insert 2 is indexably mounted on the first stepped surface 101 and is locked to the tool head 10 by a first locking bolt 41. The triangular insert 2 is mounted on the first stepped surface 101, and the first included angle α1 is formed between the first stepped surface 101 and the horizontal plane. The first included angle α1 can provide a suitable cutting angle for the triangular insert 2, thereby reducing cutting resistance and improving the cutting effect on the workpiece. In this embodiment, the first included angle α1 is 16°.

[0030] The triangular insert 2 is coated with a ceramic coating. The insert 2 has three circumferential cutting edges 20, each with an angular structure. Each cutting edge 20 has a chip breaker groove 21 extending along its periphery. A chamfer 22 is provided at the end of each cutting edge 20 near the chip breaker groove 21. The ceramic coating provides the triangular insert 2 with higher hardness and wear resistance, thereby reducing friction with the workpiece material, improving the thermal stability of the insert 2 under high-temperature cutting conditions, and extending the tool life. The service life of the triangular insert 2 is improved by having three cutting edges 20 along its circumference. This allows the insert to be replaced with a new cutting edge 20 by rotating the insert after each wear, thereby increasing the utilization rate of the insert and reducing production costs. The chip breaker groove 21 ensures that chips can be effectively and smoothly discharged during the cutting process, avoiding chip accumulation and improving processing efficiency. In addition, the chamfer 22 at the end of the cutting edge 20 enhances the mechanical strength of the cutting edge 20 and prevents chipping caused by excessive cutting impact.

[0031] The limiting pressure block 3 is arranged on the second step surface 102 and is locked and connected with the tool head 10 through the second locking bolt 42. The side wall of the limiting pressure block 3 is in abutment with the triangular blade 2 to limit the sliding of the triangular blade 2 on the first step surface 101. During the machining process, when the turning tool contacts the workpiece, complex cutting force and vibration are generated, which easily causes the triangular blade 2 to slip on the mounting surface, and then causes the cutting position to deviate, thereby affecting the stability of the machining trajectory. By arranging the second step surface 102 on the tool head 10 and mounting the limiting pressure block 3 on the second step surface 102, effective constraint of the triangular blade 2 can be formed, and the stability and precision of machining are improved.

[0032] As shown in Figure 4 Further, the second included angle a2 between the chip breaking groove 21 and the horizontal plane is 20-35°, and in the embodiment, the second included angle a2 is 35°. In this way, the inclination angle of the chip breaking groove 21 can be optimized and adjusted, so that the chip breaking groove 21 can guide the chips to flow along a reasonable trajectory during the cutting process and apply appropriate bending stress to promote the rapid breaking and discharge of the chips.

[0033] As shown in Figure 5 Further, the edge angle b of the cutting edge 20 is 35-50°, and in the embodiment, the edge angle b of the cutting edge 20 is 40°. In this way, the cutting edge 20 can maintain sufficient strength to resist the impact of cutting force, and at the same time, has appropriate sharpness, so that the cutting edge 20 can easily cut into the workpiece material, reduce the cutting resistance, and thereby improve the turning machining efficiency of the workpiece.

[0034] As shown in Figure 1 Further, the cutting edge 20 is provided with a first cutting surface 201 and a second cutting surface 202 at both ends of the edge, and the side wall of the limiting pressure block 3 close to the triangular blade 2 is provided with a first support surface 31 and a second support surface 32. The first support surface 31 is in abutment with the first cutting surface 201, and the second support surface 32 is in abutment with the second cutting surface 202. In this way, the fixing stability of the triangular blade 2 can be enhanced through multi-surface contact, the loosening or slipping of the triangular blade 2 caused by stress concentration at a single contact point can be avoided, and the impact resistance and vibration resistance of the triangular blade 2 are improved.

[0035] As shown in Figure 1 and Figure 3 Further, the first support surface 31 and the second support surface 32 are provided with a receiving groove 30 for avoiding the inverted bevel 22. In this way, the supporting effect of the triangular blade 2 can be avoided due to the existence of the inverted bevel 22 structure or assembly interference.

[0036] Further, the triangular blade 2 is made of tungsten steel hard alloy, and the tool handle 1 is made of alloy steel. The triangular blade 2 is made of tungsten steel hard alloy, which has the characteristics of high hardness, wear resistance and heat resistance, can withstand high-strength cutting conditions, thereby prolonging the service life of the triangular blade 2; the tool handle 1 is made of alloy steel, which has high strength and good toughness, can effectively resist cutting vibration and impact force, thereby maintaining the structural stability and machining precision of the tool.

[0037] Further, the ceramic coating is one of a silicon nitride coating, an aluminum oxide coating or a titanium carbide coating. In the embodiment, the ceramic coating is a silicon nitride coating. In the turning process, the triangular blade 2 is in contact with the high-speed rotating workpiece and will withstand great cutting force and friction. The silicon nitride coating has high hardness and low friction coefficient, which can reduce the friction between the triangular blade 2 and the workpiece, thereby reducing wear and prolonging the service life of the triangular blade 2. At the same time, the silicon nitride coating has excellent thermal stability and oxidation resistance in high-temperature environment, which can avoid the softening failure of the triangular blade 2 due to heat accumulation.

[0038] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A cermet tool for turning machining, characterized in that, The tool shank is provided with an integrally formed tool head portion at the end thereof, the tool head portion has a first step surface and a second step surface; a first included angle is formed between the first step surface and the horizontal plane; the triangular blade is indexable and arranged on the first step surface and locked and connected with the tool head portion by a first locking bolt; The triangular blade is coated with a ceramic coating, the triangular blade is provided with three cutting edges in the circumferential direction, the cutting edges have an angular structure, the cutting edges are provided with chip breaking grooves on the cutting surface, the chip breaking grooves are arranged in the peripheral direction of the cutting edges, and the cutting edges at the end of the chip breaking grooves are provided with a chamfer; The limiting block is arranged on the second step surface and locked and connected with the tool head portion by a second locking bolt, the side wall of the limiting block abuts against the triangular blade to limit the sliding of the triangular blade on the first step surface.

2. The cermet tool for turning according to claim 1, characterized in that, The first included angle is 10-20°.

3. The cermet tool for turning according to claim 1, characterized in that, A second included angle is formed between the chip breaking groove and the horizontal plane, and the second included angle is 20-35°.

4. The cermet tool for turning according to claim 1, characterized in that, The edge angle of the cutting edge is 35-50°.

5. The cermet turning tool according to claim 1, characterized in that The cutting edge is provided with a first cutting surface and a second cutting surface at the two ends of the cutting edge; The side wall of the limiting block close to the triangular blade is provided with a first support surface and a second support surface, the first support surface abuts against the first cutting surface, and the second support surface abuts against the second cutting surface.

6. The cermet turning tool according to claim 5, characterized in that A receiving groove is arranged between the first support surface and the second support surface, and the receiving groove is used for avoiding the chamfer.

7. The cermet turning tool according to claim 1, characterized in that The triangular blade is made of tungsten steel hard alloy, and the tool shank is made of alloy steel.

8. The cermet tool for turning according to claim 1, characterized in that, The ceramic coating is one of a silicon nitride coating, an aluminum oxide coating or a titanium carbide coating.

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