CN110385468A - A kind of quick change cutter blade - Google Patents

Abstract

The invention relates to a quick-change milling insert, which includes a body and a cutter head. The above-mentioned body is rhombus-shaped, and its acute angle is 60°. The two acute-angled ends of the body are provided with stepped surfaces matching the shape of the cutter head. The cutter head is in the shape of an equilateral triangle, and a countersunk through hole is arranged on it. The bolt passes through the above-mentioned through hole to realize the fixing of the cutter head and the body. The number of the above-mentioned countersunk through-holes is three, and their respective central lines are parallel to the sides of the cutter head. The centroid of the triangle formed by the center line coincides with the centroid of the cutter head. In this way, the body and the head of the quick-change milling insert can be perfectly matched. A certain blade on the cutter head is worn out and can be used in reverse position. One cutter head can be used for many times, which greatly saves the cost of blade purchase, and the operation of repositioning is convenient and fast. In addition, through the countersunk through hole at a specific position Precise positioning of the cutter head.

Description

A quick-change milling insert

technical field

The invention relates to the field of mechanical cutting, in particular to a quick-change milling insert.

Background technique

During the long-term use of the milling insert, due to various factors such as the hardness of the workpiece, cutting too deep at one time, and walking too fast, it is prone to chipping, wear and other conditions. The existing processing methods are mostly Direct replacement of a new cutter head will inevitably lead to a substantial increase in production costs. Of course, there are also companies that have developed reusable multi-edged cutter heads. When the blade is damaged, the replacement operation (rotate a certain angle to reinstall), but there are also problems of low installation and positioning accuracy and long replacement time. , this technical problem needs to be solved urgently.

Contents of the invention

In order to solve the above technical problems, the object of the present invention is to provide a quick-change milling insert with simple structure, short transposition time and accurate positioning.

In order to solve the above technical problems, the present invention relates to a quick-change milling insert, which includes a body and a cutter head. The above-mentioned body is rhombus-shaped, and its acute angle is 60°. The two acute-angled ends of the body are provided with stepped surfaces matching the shape of the cutter head. The cutter head is in the shape of an equilateral triangle, and a countersunk through hole is arranged on it. The bolt passes through the above-mentioned through hole to realize the fixing of the cutter head and the body. The number of the above-mentioned countersunk through-holes is three, and their respective central lines are parallel to the sides of the cutter head. The centroid of the triangle formed by the center line coincides with the centroid of the cutter head.

The body of the quick-change milling insert is diamond-shaped and has an acute angle of 60°. Correspondingly, the cutter head installed on the body is in the shape of an equilateral triangle, and the included angles of each side are also 60°, and the two are completely consistent. A certain blade on the cutter head is worn out and can be used in reverse positions. One cutter head can be used three times, which greatly saves the cost of blade purchase, and the replacement operation is convenient and fast. In addition, through the countersunk through holes at three specific positions, Precise positioning of the cutter head.

As a further improvement of the present invention, an escape groove is provided at the bottom corner of the step surface.

Using the above preferred scheme, the avoidance groove can effectively ensure that the cutter head and the step surface on the body are completely attached, to a certain extent, ensure the consistency of the cutter head position during machining, and reduce the impact of vibration on the stability of the cutter head . In addition to the above, the avoidance groove also serves to avoid stress concentration at the corner of the root of the step surface.

As a further improvement of the present invention, the section of the escape groove is a 3/4 arc.

With the above preferred solution, the avoidance groove is arc-shaped, on the one hand, it is easy to process and manufacture; on the other hand, it has a better stress release effect.

As a further improvement of the present invention, the adjacent cutting edges of the cutter head are transitioned through a circular arc, R is 1 mm, and the cutting edge is provided with a chamfer of 0.25*30°.

Using the above-mentioned preferred scheme, the adjacent blades of the cutter head are connected by a circular arc transition, and the cutting edge is chamfered. Compared with the prior art, the strength of the cutter head and the toughness of the cutting edge are improved, thereby effectively reducing the Chipping during use.

As a further improvement of the present invention, the rake angle of the cutter head is 15°, and the rear angle is 18°.

Using the above-mentioned preferred scheme, through the optimized design of the front and back angles of the cutter head, it has a higher blade sharpness and better heat dissipation performance in the specific cutting process, so that it can improve the service life of the cutter head. Feed rate.

As a further improvement of the present invention, the material of the cutter head is cubic boron nitride.

Using the above preferred scheme, the cutting performance of the cubic boron nitride cutter head is very excellent, not only capable of processing hard materials, improving productivity, but also conducive to strictly controlling the shape and dimensional accuracy of the workpiece, and effectively improving the cutting quality of the workpiece. Significantly improve the integrity of the cutting surface of the workpiece, thus improving the fatigue strength of the parts, prolonging the service life and increasing the reliability.

As a further improvement of the present invention, the surface of the cutter head is provided with a nitrogen-aluminum-titanium coating.

Using the above-mentioned preferred scheme, the nitrogen-aluminum-titanium coating can be used as a chemical barrier and a thermal barrier for the cutter head, reducing the diffusion and chemical reaction between the cutter head and the workpiece, reducing the wear of the crescent groove, thereby improving the service life of the cutter head. And the friction coefficient of the cutter head is small, and the cutting efficiency is high.

As a further improvement of the present invention, the cutter head has a passivated cutting edge.

By adopting the above-mentioned preferred solution, the passivated blade can effectively improve the firmness of the nitrogen-aluminum-titanium coating on it and avoid chipping.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a cross-sectional view of the quick-change milling insert of the present invention.

Fig. 2 is a schematic structural view of the main body of the quick-change milling insert of the present invention.

Fig. 3 is a schematic structural view of the cutter head in the quick-change milling insert of the present invention.

Fig. 4 is a partially enlarged view of the upper step surface of the utility body.

1-body; 11-step surface; 12-avoidance groove; 2-cutter head; 21-counterbore through hole; 3-bolt.

Detailed ways

Below in conjunction with specific embodiment, content of the present invention is described in further detail:

In order to achieve the purpose of the present invention, Fig. 1 shows a sectional view of the quick-change milling insert of the present invention; Fig. 2 shows a schematic structural view of the body in the quick-change milling insert of the present invention; Fig. 3 shows a quick-change milling insert of the present invention Schematic diagram of the structure of the cutter head in the blade. The quick-change milling insert includes a body 1 and a cutter head 2 . The above-mentioned body 1 is rhombus-shaped, and its acute angle is 60°. Step surfaces 11 matching the shape of the cutter head 2 are provided at the two acute-angle ends of the body 1 . The cutter head 2 is in the shape of an equilateral triangle, and a countersunk through hole 21 is arranged thereon. The bolt 3 passes through the above-mentioned countersunk through hole 21 to realize the fixing of the cutter head 2 and the body 1 . The number of the above-mentioned countersunk through holes 21 is three, and their respective central lines are parallel to the sides of the cutter head 2 . The centroid of the triangle formed by the connecting lines of the centers coincides with the centroid of the cutter head 2 . In this way, the shape of the body 1 and the cutter head 2 of the quick-change milling insert completely match. If a certain blade on the cutter head 2 is worn out, it can be used in reverse positions. One cutter head can be used three times, which greatly saves the cost of blade purchase, and the replacement operation is convenient and fast. The hole 21 can precisely position the cutter head 2 .

As a further improvement of the above-mentioned quick-change milling cutter, the adjacent cutting edges of the cutter head 2 transition through a circular arc, R is 1mm, and the cutting edge is provided with a chamfer of 0.25*30°. Compared with the prior art, such setting improves the strength of the cutter head 2 and the toughness of the cutting edge, thereby effectively reducing the phenomenon of chipping during use. It is also possible to optimize the design of the front and rear angles of the cutter head 2 so that it has higher blade sharpness and better heat dissipation performance in the specific cutting process, so that the feed rate can be increased under the premise of ensuring the service life of the cutter head 2. Speed, the optimal rake angle of cutter head 2 is 15°, and the optimal rear angle is 18°.

In order to further optimize the implementation effect of the present invention, in another embodiment of the present invention, on the basis of the foregoing, the material of the cutter head 2 may be cubic boron nitride. Cubic boron nitride cutter head 2 has excellent cutting performance, not only capable of processing hard materials and improving productivity, but also conducive to strictly controlling the shape and dimensional accuracy of the workpiece, and can effectively improve the cutting quality of the workpiece and significantly improve the cutting surface of the workpiece The integrity of the parts, thus improving the fatigue strength of the parts, prolonging the service life and increasing the reliability. The diffusion and chemical reaction between the cutter head 2 and the workpiece are reduced, and the phenomenon of crescent groove wear can be reduced. The surface of the cutter head 2 is provided with a nitrogen-aluminum-titanium coating, thereby improving the service life of the cutter head 2 and making the friction factor of the cutter head 2 Small, high cutting efficiency.

In order to further optimize the implementation effect of the present invention, in another embodiment of the present invention, on the basis of the foregoing, in order to improve the firmness of the nitrogen-aluminum-titanium coating and avoid the phenomenon of chipping, the blade of the cutter head 2 Can do passivation treatment.

Fig. 4 shows a partially enlarged view of the upper step surface of the utility body. It can be seen from the figure that avoidance grooves 12 are provided at the corners of the bottom of the step surface 11, which can effectively ensure that the cutter head 2 is completely attached to the step surface 11 on the body 1, and guarantee the machining process to a certain extent. The consistency of the position of the middle cutter head 2 reduces the impact of vibration on the stability of the cutter head 2. In addition to the above, the escape groove 12 also serves to avoid stress concentration at the corners of the root of the step surface 11 . In order to facilitate the processing of the avoidance groove 12 and have a better stress release effect, its cross-section is preferably a 3/4 arc.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. a kind of quick change cutter blade, including ontology and cutter head, ontology assume diamond in shape, which is characterized in that diamond shape acute angle is 60 °；At this Two acute angle ends of body are provided with step surface compatible with cutter head shape；Cutter head is in equilateral triangle, and is provided on it Countersunk head through-hole, bolt pass through through-hole to realize the fixation of cutter head and ontology；The quantity of countersunk head through-hole is 3, and its respective center Line is parallel to the side of cutter head；The centroid for the triangle that the line of centres is constituted coincides with cutter head centroid.

2. quick change cutter blade according to claim 1, it is characterised in that: be provided with escape groove at the bottom corners of step surface.

3. quick change cutter blade according to claim 2, it is characterised in that: the section of escape groove is 3/4 circular arc.

4. quick change cutter blade according to claim 1, it is characterised in that: the adjacent edge of cutter head is by arc transition, R 1mm, And cutting edge is provided with 0.25*30 ° of chamfering.

5. quick change cutter blade according to claim 4, it is characterised in that: the anterior angle of cutter head is 15 °, and relief angle is 18 °.

6. quick change cutter blade according to claim 5, it is characterised in that: the material of cutter head is cubic boron nitride.

7. quick change cutter blade according to claim 6, it is characterised in that: the surface of cutter head is provided with nitrogen aluminium titanium coating.

8. quick change cutter blade according to claim 7, it is characterised in that: cutter head has the blade of Passivation Treatment.