CN103737090B - A kind of fine finishining rotary cutting tool - Google Patents

Abstract

The invention discloses a rotary cutting tool for finishing machining, which includes a cutter body, at least one set of sipes are arranged on the cutter body, and a first cutting blade and a second cutting blade are fixed in the sipes by fasteners. The first cutting blade is pressed against the second cutting blade, the second cutting blade is pressed against the sipe, the first cutting blade is provided with a first side cutting edge, and the second cutting blade is provided with Corresponding to the position of the first side cutting edge, the second side cutting edge is used for guiding anti-vibration and smoothing, and the second side cutting edge is parallel to the rotation center axis of the cutter body. The finishing rotary cutting tool has the advantages of simple structure, good anti-vibration and smoothing effects, and high surface processing quality.

Description

A finishing rotary cutting tool

technical field

The present invention relates to a metal cutting tool, in particular to a finishing rotary cutting tool.

Background technique

During the cutting process of the rotary cutting tool, due to the various cutting angles of the rotary cutting tool and the existence of manufacturing and assembly errors, it is difficult to ensure that the cutting edge on the side of the rotary cutting tool is completely on the cylindrical surface. Among them, the machined side is formed by the rotation of the side edge of the tool around the central axis of the rotary cutting tool. Since the cutting edge on the side of the rotary cutting tool is difficult to ensure on the cylindrical surface centered on the central axis, the verticality of the machined surface is not ideal. At the same time, even if the cutting edge of the cutting blade can be completely controlled on a fixed cylindrical surface, a cutting blade with a structure can only be used on a certain fixed diameter tool. As the diameter of the rotating cutting tool changes, the structural requirements of the cutting blade Corresponding changes occur, so that the versatility of the cutting insert is poor. In order to meet the different diameter process requirements of customers, it is necessary to provide customers with a variety of different cutting inserts, which greatly increases the cost of use, the difficulty of tool site management, and reduces the processing efficiency. In addition, when the rotary tool is fed in the axial direction, the processing side is formed by the helical rotation of the point at the maximum radial position of the cutting blade, and only a very small part of the cutting blade is in contact with the processing surface. When the rotary tool is suspended When the elongation is large, vibration is very easy to occur during cutting. Cutting vibration can cause rapid wear and tear of the cutting blade, and greatly reduce the quality of the machined surface. In order to ensure the machining accuracy and the service life of the cutting blade, this type of rotary cutting tool can only be used in occasions where the machining efficiency and accuracy are not high.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a finishing rotary cutting tool with simple structure, good anti-vibration and smoothing effects, and high surface processing quality.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A finishing rotary cutting tool, comprising a cutter body, on which at least one set of sipes are arranged, and a first cutting blade and a second cutting blade are fixed in the sipes by fasteners, the first The cutting blade is pressed against the second cutting blade, the second cutting blade is pressed against the sipe, the first cutting blade is provided with a first side cutting edge, and the second cutting blade is provided with the first side cutting edge The position of the cutting edge corresponds to the second side cutting edge for guiding anti-vibration and smoothing, and the second side cutting edge is parallel to the rotation center axis of the cutter body.

As a further improvement of the above technical solution:

The rotational cutting radius of the first side cutting edge is larger than the rotational cutting radius of the second side cutting edge, and the difference is d, 0≤d≤0.05.

The diameter of the indexable rotary cutting tool is D1, the flank surface of the second side cutting edge is an arc surface, the diameter of the arc surface is D2, and D2≤D1.

The axial inclination angle of the first cutting blade relative to the central axis of rotation is α, the radial inclination angle of the first cutting blade relative to the central axis of rotation is β, α≠0°, β≠0°.

A plurality of cooling grooves are provided between the first cutting blade and the second cutting blade, and a cooling passage is provided on the cutter body, and the cooling passage passes through the second center hole on the second cutting blade and the plurality of cooling grooves. connected.

The plurality of cooling grooves are provided on the bottom surface of the first cutting insert and/or the top surface of the second cutting insert.

A seal is sheathed on the fastener, and the fastener seals both ends of the first center hole of the first cutting blade through the seal.

Compared with the prior art, the present invention has the advantages of:

The finishing rotary cutting tool of the present invention adopts the structure of double-layer cutting blades, wherein the second cutting blade is provided with a second side cutting edge corresponding to the position of the first side cutting edge for guiding anti-vibration and smoothing, and The second side cutting edge is parallel to the rotation center axis of the cutter body. This structure enables the second cutting insert of the same type to be assembled on rotating cutting tools with different diameters and still fit the cylindrical processing surface completely, which can be well controlled. The verticality of the side processing surface effectively eliminates the tool mark during layered cutting; at the same time, the second side cutting edge and the side processing surface are in full surface contact, effectively suppressing the vibration generated by the rotary cutting tool during cutting, and improving the machining performance of the rotary cutting tool. Surface quality, when the overhang of the rotary cutting tool is large, it can still ensure high cutting efficiency and good surface processing quality. A plurality of cooling grooves are provided between the first cutting blade and the second cutting blade, and the plurality of cooling grooves can simultaneously cool the cutting area, thereby realizing complete cooling of the cutting area and improving the cutting performance and processing efficiency of the rotary cutting tool.

Description of drawings

Fig. 1 is a perspective view of the first embodiment of the rotary cutting tool of the present invention.

Fig. 2 is a schematic bottom view of the first embodiment of the rotary cutting tool of the present invention.

Fig. 3 is a front structural schematic diagram of the first embodiment of the rotary cutting tool of the present invention.

Fig. 4 is an AA sectional view of Fig. 2 .

Fig. 5 is a schematic structural view of the second cutting blade in the first embodiment of the rotary cutting tool of the present invention.

Fig. 6 is a schematic diagram of the combined structure of two cutting blades in the first embodiment of the rotary cutting tool of the present invention.

Fig. 7 is a schematic perspective view of the second embodiment of the rotary cutting tool of the present invention.

Fig. 8 is a schematic perspective view of the cutter body in the second embodiment of the rotary cutting tool of the present invention.

Fig. 9 is a schematic bottom view of the second embodiment of the rotary cutting tool of the present invention.

Fig. 10 is a BB sectional view of Fig. 9 .

Each label in the figure means:

1. Cutter body; 11. Slot groove; 12. Central axis of rotation; 13. Cooling channel; 2. Cooling groove; 3. First cutting blade; 31. First side cutting edge; 32. First center hole; 4. The second cutting blade; 41, the second side cutting edge; 42, the second center hole; 43, the flank; 5, the fastener; 6, the seal.

detailed description

Fig. 1 to Fig. 6 have shown the embodiment of the first kind of finishing rotary cutting tool of the present invention, and this rotary cutting tool comprises cutter body 1, and this cutter body 1 is milling cutter cutter body, and cutter body 1 is provided with at least one group The sipe 11, the first cutting blade 3 and the second cutting blade 4 are fixed by the fastener 5 in the sipe 11, the first cutting blade 3 is pressed on the second cutting blade 4, and the second cutting blade 4 is pressed on the On the sipe 11, the first cutting blade 3 is provided with a first side cutting edge 31, and the second cutting blade 4 is provided with a second side cutting edge corresponding to the position of the first side cutting edge 31 for guiding anti-vibration and smoothing. Edge 41, the second side cutting edge 41 is parallel to the rotation central axis 12 of the cutter body 1, and adopts the structure of a double-layer cutting blade, so that the second cutting blade 4 of the same model can be assembled with the rotary cutting tool of different diameters and still be compatible with the column. The verticality of the side processing surface can be well controlled, effectively eliminating the contact marks during layered cutting; at the same time, the second side cutting edge and the side processing surface are in full surface contact, effectively inhibiting the rotation of the cutting tool The vibration generated during cutting improves the surface quality of the rotary cutting tool. When the overhang of the rotary cutting tool is large, it can still ensure high cutting efficiency and good surface processing quality.

Further, the rotational cutting radius of the first side cutting edge 31 is larger than the rotational cutting radius of the second side cutting edge 41 , and the difference is d, 0≤d≤0.05, in this embodiment, d=0.03. The diameter of the indexable rotary cutting tool is D1, the flank surface 43 of the second side cutting edge 41 is an arc surface, and the diameter of the arc surface is D2, D2≤D1. The axial inclination angle of the first cutting blade 3 relative to the central axis of rotation 12 is α, the radial inclination angle of the first cutting blade 3 relative to the central axis of rotation 12 is β, α≠0°, β≠0°, in this embodiment , α=3°, β=-6°.

Further, a plurality of cooling grooves 2 are provided between the first cutting blade 3 and the second cutting blade 4, and a cooling channel 13 is provided on the cutter body 1, and the cooling channel 13 passes through the second center hole 42 on the second cutting blade 4 It communicates with a plurality of cooling grooves 2, and a plurality of cooling grooves 2 are arranged on the bottom surface of the first cutting blade 3 and/or on the top surface of the second cutting blade 4. In this embodiment, a plurality of cooling grooves 2 are arranged on the second cutting blade 4 on the top surface of blade 4. The cooling medium can reach the cutting area through the cooling channel 13 and the cooling groove 2, which can fully cool the cutting area, and form an impact on the chips generated by the second cutting blade 4, so as to quickly discharge the chips; at the same time, when the cooling medium adopts high-pressure cooling At this time, the chip can be broken quickly, thereby increasing the cutting capacity of the second cutting blade 4 and increasing the acceptable cutting feed and cutting load. The fastener 5 is sleeved with a seal 6 , and the fastener 5 seals both ends of the first central hole 32 of the first cutting blade 3 through the seal 6 , thereby improving the high-pressure cooling effect.

7 to 10 show the second embodiment of the finishing rotary cutting tool of the present invention, which is basically the same as the first embodiment, the only difference being that the cutter body 1 of the present invention is a drill cutter body.

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 invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes 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 solution of the present invention.

Claims (7)

1. a fine finishining rotary cutting tool, comprise cutter hub (1), described cutter hub (1) is provided with at least one group of cutter groove (11), it is characterized in that: in described cutter groove (11), be fixed with the first cutting tip (3) and the second cutting tip (4) by securing member (5), described first cutting tip (3) is pressed on the second cutting tip (4), described second cutting tip (4) is pressed on cutter groove (11), described first cutting tip (3) is provided with the first side cut sword (31), described second cutting tip (4) is provided with corresponding with the first side cut sword (31) position, for the second side cut sword (41) of lead antivibration and smoothing, described second side cut sword (41) is parallel with the rotary middle spindle (12) of described cutter hub (1).

2. fine finishining rotary cutting tool according to claim 1, is characterized in that: the rotary cutting radius of described first side cut sword (31) is greater than the rotary cutting radius of the second side cut sword (41), and difference is d, 0≤d≤0.05mm.

3. fine finishining rotary cutting tool according to claim 1, it is characterized in that: the diameter of described fine finishining rotary cutting tool is D1, the rear knife face (43) of described second side cut sword (41) is arc surface, and the diameter of described arc surface is D2, D2≤D1.

4. fine finishining rotary cutting tool according to claim 1, it is characterized in that: described first cutting tip (3) is α relative to the axial inclination of rotary middle spindle (12), described first cutting tip (3) is β relative to the radial rake of rotary middle spindle (12), α ≠ 0 °, β ≠ 0 °.

5. fine finishining rotary cutting tool according to any one of claim 1 to 4, it is characterized in that: between described first cutting tip (3) and the second cutting tip (4), be provided with multiple cooling bath (2), described cutter hub (1) is provided with cooling duct (13), and described cooling duct (13) second centre bore (42) on the second cutting tip (4) is communicated with multiple cooling bath (2).

6. fine finishining rotary cutting tool according to claim 5, is characterized in that: described multiple cooling bath (2) is located on the bottom surface of the first cutting tip (3) and/or the end face of the second cutting tip (4).

7. fine finishining rotary cutting tool according to claim 6, it is characterized in that: described securing member (5) is arranged with seal (6), described securing member (5) is sealed the first centre bore (32) two ends of the first cutting tip (3) by seal (6).