CN204413183U - A kind of rotary machining tool - Google Patents

Abstract

The utility model discloses a rotary processing cutter, which comprises a cutter body, a cutting blade and a blade fastener. A knife groove is opened on the outer edge of the cutter, and the cutting blade is installed in the knife groove through the blade fastener. Inside, the positioning bottom surface of the sipe for radial positioning of the cutting blade is provided with a through hole, the area of the cutter body located inside the positioning bottom surface is provided with a receiving groove, and the rotary processing tool also includes a locking reinforcement, The locking reinforcement is installed in the receiving groove, one end of the blade fastener is connected to the cutting blade, and the other end is connected to the locking reinforcement passing through the through hole. The rotary machining tool has the advantages of simple structure, high-speed rotary machining, and safety and reliability.

Description

A rotary machining tool

technical field

The utility model relates to the field of metal cutting processing, in particular to a rotary processing tool.

Background technique

During the cutting process of rotary cutting tools, high-speed cutting with a line speed between 1000m/min and 5000m/min can greatly improve processing efficiency. Due to the high density of ordinary tool materials (usually steel), during high-speed cutting, Especially when the outer diameter of the cutting tool is large, the rotation of the tool greatly increases the rotational load of the spindle when the machine tool is started. In addition, in the process of high-speed cutting, the eccentric mass produces a large unbalanced centrifugal force. In order to reduce the unbalanced centrifugal force, it is necessary to reduce the eccentric mass of the cutting tool relative to the center of rotation. The tool body is generally made of a material with a low density (usually aluminum alloy) Compared with ordinary cutting tool materials, this type of material has the characteristics of low density, low strength, low hardness and non-wear resistance. Since the bending strength of aluminum alloy is only 1/4 to 1/2 of ordinary cutting tool materials, the use of The internal thread on the cutter body clamps the blade or the tool holder. Due to stress fatigue, the thread is easily damaged and affects the tool life. In order to improve the tool life, it is necessary to avoid the inner thread of the cutter from directly matching the blade or the tool holder where the blade is installed.

A structure known in the field of high-speed machining at present is composed of an aluminum alloy tool body, a tool holder for installing a blade, a wedge, and a wedge fastener. In the knife groove, a threaded hole is arranged on the wedge, and the fastener is installed in the threaded hole to press the knife holder tightly. The shortcomings of this structure are: due to the small effective contact area between the fastener and the toolholder, long-term use is likely to cause fatigue damage, and the threaded hole on the cutter body is damaged so that the thread is insufficient to provide the pressing force of the fastener and falls off. The firmware is easy to fly out at high speed under the action of centrifugal force, which poses a great threat to the operator; there are many types of tool accessories, which are not easy to manage.

Utility model content

The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a safe and reliable rotary processing tool with simple structure, which can realize high-speed rotary processing.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A rotary machining tool, comprising a cutter body, a cutting blade and a blade fastener, the outer edge of the cutter is provided with a groove, the cutting blade is installed in the groove through the blade fastener, the blade The groove is used for the radial positioning of the cutting blade, and a through hole is opened on the positioning bottom surface, and an accommodation groove is opened on the inner side of the positioning bottom surface on the cutter body. The rotary processing tool also includes a locking reinforcement, and the locking reinforcement One end of the blade fastener is connected to the cutting blade, and the other end is connected to the locking reinforcement through the through hole.

As a further improvement of the above technical solution:

The blade fastener is a fastening screw, and the locking reinforcing member is provided with a locking threaded hole on the same center line as the through hole, the head of the fastening screw pulls the cutting blade, and the tail part passes through Through the central hole of the cutting insert and the through hole, it is threadedly connected with the locking threaded hole.

The locking reinforcement is a cylindrical pin that interferes with the receiving groove.

The through hole is a threaded hole matched with the fastening screw.

The central axis of the cylindrical pin is parallel to the central axis of the rotary machining tool.

The centerline of the central hole of the cutting insert is parallel to the centerline of the locking threaded hole at a distance D.

The angle between the first positioning side of the sipe and the positioning bottom is α, the angle between the second positioning side of the sipe and the positioning bottom is β, and 65°≤α≤80°, 65°≤β≤ 80°.

The cutter body is an aluminum alloy cutter body, and the locking reinforcement is an alloy steel cylindrical pin.

Compared with the prior art, the utility model has the advantages of:

In the rotary processing tool of the utility model, a receiving groove is provided on the cutter body, and a locking reinforcing member is installed in the receiving groove, and the blade fastener passes through the through hole on the cutter body to connect with the locking reinforcing member, thereby fixing the cutting blade Installed into the sipe, during the cutting process, the cutting blade mainly relies on the connection between the blade fastener and the locking reinforcement to achieve fixed locking in the sipe, while the contact between the locking reinforcement and the blade fastener and the cutter body All are in surface contact, which solves the problem of insufficient connection strength between the blade fastener and the cutter body when the cutter body is made of aluminum alloy and other low-density materials in the prior art. Therefore, the cutter body of the utility model rotary processing tool It can be made of materials with low density such as aluminum alloy, and the locking reinforcement is made of materials whose strength and hardness are higher than that of the cutter body. The strength and reliability of the installation on the blade prevent the blade fastener and the cutting blade from being thrown out under the action of centrifugal force.

Description of drawings

Fig. 1 is a three-dimensional exploded schematic diagram of a rotary machining tool of the present invention.

Fig. 2 is a partial three-dimensional structure diagram of the cutter body of the rotary machining tool of the present invention.

Fig. 3 is a view along the direction A of Fig. 2 .

Fig. 4 is a B-B sectional view of Fig. 3 .

Fig. 5 is a C-C sectional view of Fig. 3 .

Fig. 6 is a three-dimensional structure diagram of the cutting blade of the rotary machining tool of the present invention.

Each label in the figure means:

1. Cutter body; 2. Cutting blade; 21. Center hole; 3. Blade fastener; 4. Slot; 41. First positioning side; 42. Second positioning side; 43. Positioning bottom; 5. Accommodating groove ; 6, locking reinforcement; 61, locking threaded hole; 7, through hole.

Detailed ways

The utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 to Fig. 6 have shown a kind of embodiment of the utility model rotary processing cutter, and this rotary processing cutter comprises cutter body 1, cutting blade 2 and blade fastener 3, and cutter body 1 outer edge is provided with knife groove 4, The cutting blade 2 is installed in the sipe 4 through the blade fastener 3, the sipe 4 is provided with a through hole 7 on the positioning bottom surface 43 for the radial positioning of the cutting blade 2, and the area on the cutter body 1 located inside the positioning bottom surface 43 is opened. There is an accommodating groove 5, and the rotary machining tool also includes a locking reinforcement 6, which is installed in the accommodating groove 5, and one end of the blade fastener 3 is connected to the cutting blade 2, and the other end is connected with the lock through the through hole 7. The tightening reinforcement 6 is connected, and an accommodation groove 5 is provided on the cutter body 1, and a locking reinforcement 6 is installed in the accommodation groove 5, and the blade fastener 3 passes through the through hole 7 on the cutter body 1 and is connected with the locking reinforcement 6 connection, so that the cutting blade 2 is fixedly installed in the sipe 4. During the cutting process, the cutting blade 2 mainly relies on the connection of the blade fastener 3 and the locking reinforcement 6 to realize the fixed locking in the sipe 4, and the lock The contact between the tightening reinforcement 6 and the blade fastener 3 and the cutter body 1 is surface contact, which solves the problem of the blade fastener 3 and the cutter body 1 when the cutter body 1 is made of aluminum alloy and other materials with low density in the prior art. Therefore, the cutter body 1 of the rotary machining tool in this embodiment can be made of a material with a lower density such as aluminum alloy, and the locking reinforcement 6 is made of a material whose strength and hardness are higher than that of the cutter body production, the blade fastener 3 is connected with a high-strength, high-hardness locking reinforcement 6, and the connection is stable and reliable. Therefore, the rotary machining tool of this embodiment is suitable for high-speed rotary processing, ensuring the fastening of the cutting blade 2 on the cutter body 1. The installation strength and reliability prevent the blade fastener 3 and the cutting blade 2 from being thrown out under the action of centrifugal force.

In this embodiment, the blade fastener 3 is a fastening screw, and the locking reinforcement 6 is provided with a locking threaded hole 61 on the same center line as the through hole 7. The head of the fastening screw pulls the cutting blade 2, and the tail passes through Through the central hole 21 of the cutting blade 2 and the through hole 7 and the locking threaded hole 61, the connection strength is high and the disassembly of the cutting blade 2 is convenient.

In this embodiment, the locking reinforcing member 6 is a cylindrical pin that is interference-fitted with the receiving groove 5, and has a simple structure and is easy to process.

In this embodiment, the through hole 7 is a threaded hole matched with the fastening screw, and the blade fastener 3 and the through hole 7 are also threaded, so as to facilitate the positioning of the cutting blade 2 .

In this embodiment, the central axis of the cylindrical pin is parallel to the central axis of the rotary machining tool, and the central axis of the locking threaded hole 61 is perpendicular to the central axis of the rotary machining tool, that is, the cylindrical pin is arranged along the axial direction of the rotary machining tool, and the fastening screw is arranged along the axis of the rotary machining tool. Radial setup for rotary machining tools.

In this embodiment, the centerline of the center hole 21 of the cutting insert 2 is parallel to the centerline of the locking threaded hole 61 with a distance D, and the insert fastener 3 locks the cutting insert 2 by pressing the side of the center hole 21 .

The included angle between the first positioning side 41 of the sipe 4 and the positioning bottom 43 is α, the included angle between the second positioning side 42 of the sipe 4 and the positioning bottom 43 is β, and 65°≤α≤80°, 65°≤ β≤80°, in the present embodiment, α=β=70°, that is, the first positioning side 41 and the second positioning side 42 of the sipe 4 not only act on the lateral positioning of the cutting blade 2, but also exert force on the cutting blade 2. The radial force directed to the centerline of the rotary machining tool is beneficial to the fastening of the cutting blade 2. In addition, if the head of the blade fastener 3 is sheared and broken during the cutting process, it can also prevent the cutting blade 2 from flying out. .

In this embodiment, the cutter body 1 is an aluminum alloy cutter body, and the locking reinforcement 6 is an alloy steel cylindrical pin. The use of an aluminum alloy cutter body can reduce the unbalanced centrifugal force during high-speed rotating machining, and the use of an alloy steel cylindrical pin ensures that the cutting blade 2 Mounting strength and reliability on the cutter body 1.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art, without departing from the scope of the technical solution of the present utility model, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the utility model, or modify it into an equivalent change, etc. effective example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical proposal of the present invention.

Claims (8)

1. A rotary machining tool, comprising a cutter body (1), a cutting blade (2) and a blade fastener (3), the outer edge of the cutter body (1) is provided with a groove (4), and the cutting blade (2) Installed in the sipe (4) through the blade fastener (3), characterized in that: the sipe (4) is used for the positioning bottom surface (43) of the radial positioning of the cutting blade (2) ) is provided with a through hole (7), the cutter body (1) is provided with a receiving groove (5) in the area inside the positioning bottom surface (43), and the rotary processing tool also includes a locking reinforcement (6), The locking reinforcement (6) is installed in the receiving groove (5), one end of the blade fastener (3) is connected to the cutting blade (2), and the other end is connected to the through hole ( 7) Connect with the locking reinforcement (6). 2. The rotary machining tool according to claim 1, characterized in that: the blade fastener (3) is a fastening screw, and the locking reinforcement (6) is opened with the through hole (7 ) with the locking threaded hole (61) on the center line, the head of the fastening screw pulls the cutting blade (2), and the tail passes through the center hole (21) of the cutting blade (2) and the through hole The hole (7) is threadedly connected with the locking threaded hole (61). 3. The rotary machining tool according to claim 1 or 2, characterized in that: the locking reinforcing member (6) is a cylindrical pin with an interference fit with the receiving groove (5). 4. The rotary machining tool according to claim 2, characterized in that: the through hole (7) is a threaded hole matched with the fastening screw. 5. The rotary machining tool according to claim 3, wherein the central axis of the cylindrical pin is parallel to the central axis of the rotary machining tool. 6. The rotary machining tool according to claim 2, characterized in that: the central line of the central hole (21) of the cutting insert (2) is parallel to the central line of the locking threaded hole (61) with a distance of d. 7. The rotary machining tool according to claim 1 or 2, characterized in that: the included angle between the first positioning side (41) and the positioning bottom surface (43) of the knife groove (4) is α, and the knife groove (4) (4) The angle between the second positioning side surface (42) and the positioning bottom surface (43) is β, and 65°≤α≤80°, 65°≤β≤80°. 8. The rotary machining tool according to claim 1 or 2, characterized in that: the tool body (1) is an aluminum alloy tool body, and the locking reinforcement (6) is an alloy steel cylindrical pin.