CN107214353A - A kind of lower high temperature alloy semifinishing indexable turning blade of high pressure cooling - Google Patents

Abstract

The invention relates to an indexable turning insert used for high-temperature alloy semi-finishing under high-pressure cooling, which belongs to the technical field of turning tools. The car blade comprises a car blade main body, the outer contour shape of the horizontal section of the car blade main body is hexagonal, the geometric center of the hexagonal car blade main body is provided with a fastening screw hole, and the hexagonal car blade main body top surface outer periphery is provided with There is a rake face, the six vertex angles of the hexagonal turning blade body are composed of three 80° angles and three 160° angles alternately arranged in turn, and the three 80° angles of the hexagonal turning blade body are all provided with circles Arc tool tip, the six outer edges of the top surface of the hexagonal turning insert body are provided with negative chamfer cutting edges, each arc tool tip is provided with a protrusion, the top surface of the hexagonal turning insert body and the front knife On the surface corresponding to each 160° angle, there is a broken-line stepped chip breaker, which forms a chip removal groove with the rake face, and the bottom surface of the hexagonal turning blade body is the blade installation support surface. The invention is used for semi-finishing high-temperature alloy under high-pressure cooling.

Description

An indexable turning insert for semi-finishing superalloy under high-pressure cooling

technical field

The invention relates to a turning blade for high-temperature alloy processing, which belongs to the technical field of turning tools.

Background technique

Superalloys are widely used in the fields of aviation, aerospace, navigation and nuclear power industry due to their excellent mechanical properties such as high fatigue strength and high yield strength under high temperature conditions, but superalloys are a typical Difficult-to-machine materials, poor machinability, severe work hardening, high cutting force, high cutting temperature, and difficult chip breakage have a great impact on the high-quality and high-efficiency processing of superalloys. At present, cemented carbide tools are mainly used to process high-temperature alloys. During the cutting process, the tools are severely worn and damaged, and their service life is short. It is difficult to guarantee the processing quality and efficiency of parts. One of the effective ways to solve the processing problem of difficult-to-machine materials is to change the geometric parameters of the tool and design the structure of the chip breaker. The lubricated processing method can effectively reduce the cutting force and cutting temperature, improve the chip breaking ability, and is conducive to efficient and stable cutting.

Contents of the invention

The purpose of the present invention is to solve the problem that most turning blades are in the cutting process of high-temperature alloys. Due to the poor machinability of materials, there are large cutting force, high cutting temperature, difficult chip breakage, difficult chip removal, serious wear and damage of turning blades, and serious machining problems. In order to solve problems such as difficulty in guaranteeing precision, an indexable turning insert for semi-finishing superalloy under high-pressure cooling is provided.

The present invention optimizes the cutting edge and chip breaker structure of the existing turning blade, so that the turning blade is suitable for cutting under high-pressure cooling, improves chip breaking ability, reduces cutting temperature, reduces tool wear, and improves processing quality and efficiency .

For realizing above-mentioned object, the technical scheme that the present invention takes is:

An indexable turning blade for semi-finishing superalloy under high-pressure cooling of the present invention comprises a turning blade main body, the outer contour shape of the horizontal section of the turning blade main body is hexagonal, and the geometry of the hexagonal turning blade main body is There is a fastening screw hole in the center, and a rake surface is provided on the outer periphery of the top surface of the hexagonal turning blade body. The six top angles of the hexagonal turning blade body are alternately composed of three 80° angles and three 160° angles. Arranging and forming, the three 80° angles of the hexagonal turning blade body are provided with circular arc tool tips, and the six outer edges of the top surface of the hexagonal turning blade body are all provided with negative chamfering cutting edges, and each of the Protrusions are provided near the arc tool tip, and folded line stepped chip breakers are respectively provided on the top surface of the main body of the hexagonal turning blade and on the rake face corresponding to each 160° angle. The chip breaker and the rake face form a chip removal groove, and the bottom surface of the hexagonal turning insert body is the insert support surface.

The beneficial effect of the present invention relative to prior art is:

1. An indexable turning insert for high-temperature alloy semi-finishing under high-pressure cooling according to the present invention adopts a larger circular-arc tip and a tangential connection with a negative chamfer cutting edge, which is conducive to improving the strength and impact resistance of the cutting edge To ensure the smoothness of the rake face, reduce the friction between the chip and the rake face, reduce the possibility of tool sticking wear, and improve the processing quality and tool life;

2. An indexable turning insert for semi-finishing high-temperature alloy under high-pressure cooling of the present invention adopts a tower-shaped protrusion, which is conducive to breaking the chip while increasing the strength of the tip, and can reduce the contact length of the knife-chip and The friction of chips on the tool helps to cut more stably;

3. An indexable turning insert for high-temperature alloy semi-finishing under high-pressure cooling according to the present invention adopts a broken-line stepped chipbreaker and a chip-removal groove formed by a rake face, which increases the chip-holding space and facilitates storage. The high-pressure coolant reduces the temperature during the cutting process of the blade. At the same time, the broken-line stepped chip breaker and the complex curve change structure are conducive to the additional breaking of chips, and control the outflow direction of chips so that chips can take away more heat. Reduce the temperature of the blade and increase the service life of the blade;

4. An indexable turning insert for semi-finishing superalloys under high-pressure cooling according to the present invention adopts a double rake angle design. The combination of the rake angle of the turning insert and the negative chamfer angle increases the rake angle of the larger turning insert Improving the sharpness of the cutting edge can make the cutting smoother and improve the machining accuracy. The design of the negative chamfer cutting edge can increase the strength of the cutting edge, play a role in impact resistance, and reduce the possibility of tool chipping;

5. An indexable turning insert for semi-finishing superalloy under high-pressure cooling of the present invention adopts fastening screw holes, and the screws are pressed tightly, so that the force distribution on the positioning surface is even, which is convenient for inserting and clamping, and is conducive to improving the positioning of the insert. Accuracy, installation accuracy and cutting stability.

Description of drawings

Fig. 1 is an isometric view of an indexable turning insert for semi-finishing superalloy under high-pressure cooling of the present invention;

Fig. 2 is a top view of the bottom surface of an indexable turning insert for semi-finishing superalloy under high pressure cooling of the present invention;

Fig. 3 is a plan view of the top surface of an indexable turning insert for semi-finishing superalloy under high pressure cooling according to the present invention.

Fig. 4 is a partial enlarged view of A in Fig. 1 .

Fig. 5 is a partial enlarged view of B in Fig. 1 .

FIG. 6 is a partial enlarged view of C in FIG. 3 .

Fig. 7 is a partially enlarged view at D in Fig. 3 .

In the figure, arc tool tip 1, protrusion 2, rake face 3, broken line stepped chip breaker 4, hexagonal turning insert body 5, fastening screw hole 6, chip flute 7, negative chamfer cutting edge 8. Blade installation support surface 9.

detailed description

In order to better understand the solution of the patent of the present invention, the technical solution of the present invention will be further described in conjunction with the accompanying drawings, but it is not limited thereto. Any modification or equivalent replacement of the technical solution of the present invention without departing from the technical solution of the present invention Both the spirit and scope should be included in the protection scope of the present invention.

Specific Embodiment 1: As shown in Figures 1-7, this embodiment discloses an indexable turning insert for semi-finishing high-temperature alloys under high-pressure cooling, including a turning insert body, and the horizontal section of the turning insert main body Outer contour shape is hexagonal, and the geometric center of hexagonal turning blade main body 5 is provided with fastening screw hole 6, and the outer periphery of hexagonal turning blade main body 5 top surface is provided with rake face 3, and hexagonal turning blade main body The six vertex angles of the main body 5 are composed of three 80° angles and three 160° angles arranged alternately in sequence. The three 80° angles of the hexagonal turning blade body 5 are all provided with arc tool tips 1, and the hexagonal The six outer edges of the top surface of the turning blade main body 5 are all provided with negative chamfer cutting edges 8, and each of the arc tip 1 is provided with a protrusion 2, and the top surface of the hexagonal turning blade main body 5 and the front On the cutter face 3 corresponding to each 160° angle, there are respectively provided with a broken line stepped chip breaker 4, and the broken line stepped chip breaker 4 and the rake face 3 form a chip removal groove 7, and the hexagonal turning blade The bottom surface of the main body 5 is a blade mounting support surface 9 . The broken-line stepped chip breaker 4 is a stepped chip-breaker with irregular broken lines.

In order to meet the blade shape requirements of 80 ° for the angle of the tool tip, the outer contour shape of the horizontal section of the main body of the turning blade is designed to be hexagonal, and the six corners of the hexagonal turning blade main body 5 are composed of three 80 ° angles and three The angle of 160° is arranged alternately in sequence, and the same turning blade can realize three times of indexing. Compared with the diamond-shaped blade with a tip angle of 80°, it can be indexed more times, which can improve the processing efficiency. At the same time, the main body of the turning blade adopts six The edge-shaped blade shape, the installation and support area of the turning blade is larger, which makes the installation of the turning blade more firm, and is conducive to improving the stability of the cutting process.

In this embodiment, a high-strength screw passes through the fastening screw hole 6 and is pressed on the turning handle with a high-pressure cooling pipe, so that the force distribution on the positioning surface is even, and the positioning accuracy, installation accuracy and cutting stability of the turning blade are improved. sex.

Specific embodiment 2: As shown in Figure 1 and Figure 3, this embodiment is a further description of specific embodiment 1, and the shapes of the protrusions 2 provided near each circular-arc knife tip 1 are tower-shaped .

Both the tower-shaped protrusion and the broken-line stepped chip breaker 4 need to ensure the proportional size and strength of the structure, and play a certain role in chip breaking and chip guiding, which can meet the chip space requirements of the chip slot 7 and play a role in chip removal. function, and store a certain amount of coolant at the same time, which can reduce the temperature of the turning blade during the cutting process.

Specific embodiment 3: As shown in Fig. 1, Fig. 3, Fig. 5 and Fig. 7, this embodiment is a further description of specific embodiment 1. The rake face 3 and the negative chamfer cutting edge 8 are combined to form A double rake angle design is adopted, the rake angle of the turning blade is 10°, the angle of the negative chamfer is -15°, the width of the negative chamfer is 0.1mm, and the rear angle of the turning blade is 0°. It can be combined with the high-pressure cooling turning tool holder to form a suitable relief angle, making the turning insert more practical.

Specific embodiment four: As shown in Fig. 1 and Fig. 3, this embodiment is a further description of specific embodiment two. The distance between the arc tool tip 1 and the tower-shaped protrusion is 0.1 mm.

Specific embodiment five: as shown in Fig. 1-Fig. 4 and Fig. 6, this embodiment is a further description of specific embodiment four. 1. A fastening screw hole 6 and the rake face 3 form an insert groove structure.

The present invention can improve the problems of large cutting force, high cutting temperature, difficult chip breakage, difficult chip removal, serious blade wear, poor processing quality, and low efficiency that exist in the cutting process of high-temperature alloys in most turning blades at present. The way is not limited to this, for example, the present invention can add TiAIN coating process to the turning blade, so that the toughness and hardness of the blade are higher; it is also possible to directly manufacture and produce turning blades with a suitable relief angle, such as a relief angle of 6° to 12° ° turning blades, etc., to meet the semi-finishing of high-temperature alloys with high-pressure cooling pressure in the range of 0-300bar (0-30MPa).

Claims (5)

1. An indexable turning blade for semi-finishing superalloys under high-pressure cooling, comprising a turning blade body, characterized in that: the outer contour shape of the horizontal section of the turning blade body is hexagonal, and the hexagonal turning blade The geometric center of the main body (5) is provided with a fastening screw hole (6), the outer periphery of the top surface of the hexagonal turning blade main body (5) is provided with a rake face (3), and the hexagonal turning blade main body (5) The six vertex angles are composed of three 80° angles and three 160° angles arranged alternately in sequence. The three 80° angles of the hexagonal turning blade body (5) are all equipped with circular arc tool tips (1). There are negative chamfer cutting edges (8) on the six outer edges of the top surface of the shaped turning blade body (5), and protrusions (2) are provided near each arc tip (1), hexagonal On the top surface of the turning blade main body (5) and the rake face (3) corresponding to each 160° angle, a broken line stepped chip breaker (4) is respectively provided, and the broken line stepped chip breaker (4) ) and the rake face (3) form a chip removal groove (7), and the bottom surface of the hexagonal turning blade body (5) is the blade installation support surface (9). 2. An indexable turning insert for semi-finishing superalloys under high-pressure cooling according to claim 1, characterized in that: the protrusions (2 ) are tower-shaped. 3. An indexable turning insert for semi-finishing superalloy under high-pressure cooling according to claim 1, characterized in that: the rake face (3) is combined with a negative chamfer cutting edge (8) A double rake angle design is adopted, the rake angle of the turning blade is 10°, the angle of the negative chamfer is -15°, and the width of the negative chamfer is 0.1mm. 4. An indexable turning insert for semi-finishing superalloy under high-pressure cooling according to claim 2, characterized in that: the arc radius of each arc-shaped tool tip (1) is 0.8mm , the distance between the three arc tool tips (1) and the tower-shaped protrusion is 0.1mm. 5. An indexable turning insert for semi-finishing high-temperature alloys under high-pressure cooling according to claim 4, characterized in that: three tower-shaped protrusions, three broken-line stepped chipbreakers (4), one Insert groove structure composed of fastening screw hole (6) and rake face (3).