阅读说明：本技术 一种机夹式凹槽铣刀 (Mechanically-clamped groove milling cutter ) 是由 相沢翔太 孙敬国 陈嘉庆 李新波 郑坤 隋志华 于 2020-08-13 设计创作，主要内容包括：本发明涉及一种机夹式凹槽铣刀,包括：刀体；以及刀片,其第一端经配置以与所述刀体连接,其第二端从所述刀体伸出；其中,所述刀片第二端的一侧包括第一切削刃及另一侧非工作部位的避空切削刃,所述第一切削刃的中心相对于所述刀体的旋转中心偏心设置,另一侧非工作部位的切削刃以大倒棱方式构成避空。本申请的铣刀能够满足稳定加工,刀片可复数次利用且刀体可重复使用,刀片更换方便,且可持续保证重复定位精度及加工精度。(The invention relates to a mechanically clamped groove milling cutter, comprising: a cutter body; and a blade having a first end configured to be coupled to the blade body and a second end extending from the blade body; one side of the second end of the blade comprises a first cutting edge and a clearance cutting edge of a non-working part on the other side, the center of the first cutting edge is eccentrically arranged relative to the rotating center of the cutter body, and the clearance is formed by the cutting edge of the non-working part on the other side in a large chamfered mode. The milling cutter can meet the requirements for stable processing, the blade can be repeatedly used, the cutter body can be repeatedly used, the blade is convenient to replace, and the repeated positioning precision and the processing precision can be continuously guaranteed.)

1. A mechanically clamped recess milling cutter comprising:

a cutter body; and

a blade having a first end configured to be coupled to the cutter body and a second end extending from the cutter body; wherein one side of the second end of the insert includes a first cutting edge having a center that is eccentrically disposed with respect to a rotational center of the cutter body.

2. The mechanically clamped recess milling cutter of claim 1, said insert being removably mounted to said cutter body by a central screw.

3. The mechanically clamped groove milling cutter of claim 1, a first end of the insert being V-shaped, the cutter body comprising a V-shaped groove configured to receive a first end of the insert.

4. The mechanically clamped groove milling cutter of claim 3, the V-shaped groove of the cutter body further comprising an extension configured to receive the first cutting edge.

5. The mechanically clamped groove milling cutter according to claim 1, wherein the first cutting edge is negative rake.

6. The mechanically clamped groove milling cutter of claim 1, said first cutting edge being spaced from a center of rotation of said cutter body such that the first cutting edge does not cross a center of rotation defined by the center of rotation.

7. The machine-clamped groove milling cutter according to claim 1, wherein the first cutting edge comprises an edge negative chamfer.

8. The mechanically clamped groove milling cutter of claim 1, said insert comprising a clearance chamfer on a side opposite the first cutting edge.

9. The mechanically clamped groove milling cutter of claim 1, wherein the insert tapers from an upper surface to a lower surface.

10. The mechanically clamped fluted milling cutter according to claim 2, wherein one side of the first end of the insert includes a second cutting edge; wherein the first and second ends of the blade are symmetrical and interchangeable in position.

Technical Field

The invention relates to the field of milling cutters, in particular to a mechanically-clamped groove milling cutter.

Background

In machining, it is often necessary to perform fine groove machining on a part of a workpiece, for example: in character carving, line scribing and the like, the depth and width of the groove to be processed are generally less than 1 mm. At present, an integral milling cutter is usually adopted for processing, but because the tool tip of the milling cutter is very thin, the tool tip part needs to bear relatively large cutting allowance, the tool is quickly worn in actual processing, the service life of the tool is very short, and the processing cost is higher. And the milling cutter has a small diameter, and when a relatively large cutting allowance is borne, the cutter is easily broken, so that the cutter is directly scrapped, and the processing cost is further increased. Because the processing shape and size are small, the precision requirement on the cutter is very high, and the existing mechanical clamping type cutter is difficult to meet the processing requirement. Therefore, development of a new high-precision machine-clamped tool is required for improvement.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a milling cutter, which comprises: a cutter body; and a blade having a first end configured to be coupled to the blade body and a second end extending from the blade body; wherein one side of the second end of the insert includes a first cutting edge having a center that is eccentrically disposed with respect to a rotational center of the cutter body.

In the milling cutter as described above, the insert is detachably mounted to the cutter body by a central screw.

The milling cutter as described above, the first end of the insert being V-shaped, the cutter body comprising a tapered recess configured to receive the first end of the insert.

The milling cutter as described above, the tapered recess of the cutter body further comprising an enlarged portion configured to receive the first cutting edge.

In the milling cutter as described above, the first cutting edge is formed with a negative rake angle.

In the milling cutter as described above, the first cutting edge is located at a distance from the rotation center of the cutter body such that the first cutting edge does not cross the rotation center line defined by the rotation center.

The milling cutter as described above, said first cutting edge comprising an edge negative chamfer.

In the milling cutter as described above, the side of the insert opposite the first cutting edge includes the necessary clearance by the large negative chamfer.

In the milling cutter as described above, the upper surface to the lower surface of the insert gradually shrinks.

The milling cutter as described above, one side of the first end of the insert comprising a second cutting edge; wherein the first and second ends of the blade are symmetrical and interchangeable in position.

The milling cutter of this application can satisfy stable processing, and cutter repeatedly usable, and the blade exchanges the convenience, sustainable assurance machining precision.

Drawings

Preferred embodiments of the present invention will now be described in further detail with reference to the accompanying drawings, in which:

FIGS. 1A-1C are schematic views of a milling cutter according to one embodiment of the present application;

FIGS. 2A-2C are schematic views of a cutter body according to one embodiment of the present application;

3A-3C are schematic views of a blade according to one embodiment of the present application;

FIG. 4 is a partial schematic view of a milling cutter according to one embodiment of the present application in an operative condition; and

fig. 5 is a schematic view of the operation of a milling cutter according to one embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the following detailed description, reference is made to the accompanying drawings that form a part hereof and in which is shown by way of illustration specific embodiments of the application. In the drawings, like numerals describe substantially similar components throughout the different views. Various specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to practice the teachings of the present application. It is to be understood that other embodiments may be utilized and structural and logical changes may be made to the embodiments of the present application.

When a fine concave groove is formed in a certain portion. For example: sharp edge waist line, scribed line, lettering and the like of the automobile side body stamping die. In practical application, due to the reasons of manufacturing precision, installation state of the blade and the like, the tool nose is deviated from the rotating central line in use frequently, so that the tool nose is in a reverse scraping state in the machining process, the cutting function is lost, the cutting force acts in the direction of separating the blade from the tool body, the tool nose is easy to tip, and the quality and the size precision of the machined surface of the workpiece are reduced.

When fine grooves are machined, chip removal space is enlarged at the cutting edge part of the traditional cutter to avoid failure of the cutting edge, so that failure of the cutting edge caused by chip blockage in machining is avoided; or the rake angle of the blade part is increased, and the vibration in the machining process is restrained by reducing the cutting force, so that the failure of the cutting edge is avoided. However, the tool tips for processing the fine grooves are very fine, and the tool tips of the traditional tools are designed on the rotating center line of the tools, so that the strength of the tool tips is further weakened by a method for avoiding the failure of the cutting edges, and the breakage and the failure of the cutting edges are more easily caused in the actual processing.

Therefore, the application provides a machine-clamped V-shaped milling cutter, which comprises a cutter body and an insert, wherein one end of the insert is in a V shape, one end of the V shape comprises a cutting edge, and the cutting edge is arranged on the side surface of the end part of the insert, so that the cutting edge has a certain offset with the rotation center of the cutter, and the cutter point is prevented from crossing the rotation center of the cutter in use. According to one embodiment of the application, the blade can be detachably arranged on the cutter body, and when the tool tip is broken, the tool tip is convenient to replace. According to one embodiment of the present application, the blade may be diamond-shaped and include cutting edges at opposite ends, which may facilitate increasing the efficiency of use of the blade.

The technical solution of the present application is further explained by the following specific embodiments. It should be understood by those skilled in the art that the following descriptions are only provided for facilitating the understanding of the technical solutions of the present application, and should not be used to limit the scope of the present application.

Fig. 1A-1C are schematic views of a milling cutter according to one embodiment of the present application. Fig. 2A-2C are schematic views of a cutter body according to one embodiment of the present application. Fig. 3A-3C are schematic views of a blade according to one embodiment of the present application.

As shown, the milling cutter 100 includes a cutter body 110 and a cutting insert 120, wherein one end of the cutter body 110 is connected with the cutting insert 120, and the other end is connected with a machining center through a clamping shank; the blade 120 has one end connected to the cutter body 110 and one end extended from the cutter body 110. According to one embodiment of the present application, the cutter body 110 may be a cylindrical rod. According to an embodiment of the present application, the side of the insert 120 extending out of one end of the cutter body includes a first cutting edge, wherein the center of the first cutting edge is eccentrically disposed with respect to the rotational center of the cutter body.

In some embodiments, the side of the insert at the end connected to the cutter body may include a second cutting edge. According to one embodiment of the present application, the substrate of the insert 120 is cemented carbide and the surface is a high hardness deep violet coating of TiAlN. According to one embodiment, the insert may be removably mounted to the cutter body by a central screw 130 to facilitate replacement or rotation of the insert 120.

The specific structure of the knife body and the knife blade will be described in detail as follows:

referring to fig. 2A-2C, according to one embodiment of the present application, the cutter body 110 is a cylindrical rod, one end of which includes a recess 101 for receiving the blade 120 or a portion thereof. According to one embodiment of the present application, the recess 101 is V-shaped for mating with the blade 120. The groove 101 may also be other shapes as will be appreciated by those skilled in the art. For example: u-shape, C-shape, trapezoidal shape, etc. According to an embodiment of the present application, the bottom of the groove 101 includes an expanded portion 102 for accommodating the second cutting edge when the insert 120 includes a plurality of cutting edges, preventing the groove of the cutter body 110 from damaging the second cutting edge when the milling cutter is in operation.

According to an embodiment of the present application, the cutter body 110 may further include a through hole 103, which may be used for coupling the insert 120 with the cutter body 110. According to one embodiment of the present application, the through hole 103 may include an internal thread, and the insert may be directly fixed to the cutter body by a screw. As will be appreciated by those skilled in the art, screw fixation is only one type of fixation in the art, and other fixation means in the art may be applied to the present application.

Referring to fig. 3A-3C, according to one embodiment of the present application, the first end of the blade has a V-shape, which can be disposed in the recess 101 of the cutter body 110 to match the recess of the cutter body 110. The second end includes a cutting edge 111, the cutting edge 111 being disposed on one side of the insert tip. In some embodiments, both ends of the blade can include cutting edges, so that after the cutting edges are failed, the blade can be directly turned, and the utilization rate of the blade is increased. According to an embodiment of the application, the two ends of the blade are symmetrical about the center of the blade and can be exchanged, so that the complex operation of the machining center on repeated tool setting of the milling cutter is reduced when the blade is favorably exchanged, and the use cost of the cutter can be effectively reduced.

In some embodiments, the second end of the insert is also V-shaped, and the cutting edge 111 may rotate back to a conical shape when the tool is rotated, and in some embodiments the cutting edge rotates back to a conical shape of 45 °. In some embodiments, when the cutting edge is ground to other angles (for example, more than 35 °), conical shapes with different angles can be formed, and various scribing, lettering and the like can be satisfied. In some embodiments, the blade 120 may have only one end with a V-shape, and the side connected to the blade body may have other shapes, such as: u-shaped, C-shaped, trapezoidal and the like, and is matched with the groove of the cutter body.

In some embodiments, the insert 120 may further include a negative edge chamfer 112, which may be used to strengthen the cutting edge, and when the insert is mounted on the cutter body, the cutting edge of the insert is located at a position lower than the center of rotation of the cutter body by a height h, which may ensure that the cutting edge has a positive rake angle θ (fig. 5) during operation, which may be beneficial to ensure that the cutting edge of the insert is sharp and has sufficient strength.

In some embodiments, the insert 120 may further include a clearance chamfer 113, which may be a cutting edge of a non-working portion and is disposed on an opposite side of the cutting edge, and the adoption of a non-conventional chamfer structure may be used to prevent a lateral edge from scraping a surface of a workpiece during rotation of the insert, and may also form a necessary clearance by adjusting the size of the chamfer. In some embodiments, the upper surface of the insert 120 is diamond-shaped, and the lower surface of the insert gradually shrinks relative to the upper surface, so as to avoid the influence of other positions of the insert on the workpiece when the cutting edge rotates. In some embodiments, the clearance chamfers make up the necessary clearance in the form of large negative chamfers.

Fig. 4 is a partial schematic view of an operating state of a milling cutter according to an embodiment of the present application. Fig. 5 is a schematic view of the operation of a milling cutter according to one embodiment of the present application.

As shown in the drawing, when the insert 120 is mounted in the recess of the cutter body 110, the recess of the cutter body 110 may limit the position of the insert, and the screw 130 may fix the insert 120 in the recess of the cutter body 110, so that the rotation accuracy of the mounted insert 120 may be ensured, thereby ensuring the depth dimension accuracy of the machined recess and the width dimension accuracy of the recess.

According to one embodiment of the present application, the blades are asymmetrically arranged with respect to the overall geometric center of the blade and the body. According to an embodiment of the present application, when the insert 120 is mounted on the cutter body, the center line of the cutting edge and the rotation center of the cutter body are eccentrically arranged, that is, there is an eccentricity τ between the center line of the cutting edge and the rotation center of the cutter body, so that it can be ensured that the cutting action of the nose cutting edge is effectively achieved during the cutting process, and the insert is always pressed to the cutter body direction under the cutting force, thereby increasing the rotation precision of the insert, and ensuring the machining precision.

According to one embodiment of the application, the cutting edge part of the blade is made into a high-strength negative rake angle-alpha structure, and after the blade is installed on the cutter body, the cutting edge of the blade is positioned at a position lower than the rotation center of the cutter body and including a height h, so that the cutting edge can be ensured to have a positive rake angle theta during operation, and the cutting edge of the blade can be ensured to be sharp and have enough strength. And the cutting edge does not cross the rotation center line, so that the cutting edge is prevented from being in a reverse scraping state in the machining process to lose the cutting function, and the tool nose is prevented from tipping to a great extent, and the quality and the dimensional accuracy of the machined surface are also prevented from being reduced.

This application milling cutter can be so that milling cutter in operation through setting up the cutting edge in one side of V-arrangement blade, and there is certain eccentric volume in the center of cutting edge and cutter rotation center to can guarantee that the cutting action of knife tip cutting edge can effectively realize in cutting process, and can also avoid tipping and the reduction of processing surface quality and size precision.

The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention, and therefore, all equivalent technical solutions should fall within the scope of the present invention.