CN213797075U

CN213797075U - Woodworking milling cutter with double helix angle cutting edges

Info

Publication number: CN213797075U
Application number: CN202022148395.3U
Authority: CN
Inventors: 刘明晶; 汤向前; 常小超
Original assignee: Henan Youlike Mechanical Tools Co ltd
Current assignee: Henan Youlike Mechanical Tools Co ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-07-27
Anticipated expiration: 2030-09-27

Abstract

The utility model relates to a wood milling cutter with two helix angle cutting edges, handle of a knife and the cutting portion of coaxial setting in handle of a knife one end including the cylinder type, the cutting portion whole be cylinder type structure, the one end equipartition that its face of cylinder is connected with the handle of a knife has the second spiral cutting edge that the sword inclination is less than zero degree, the other end equipartition of face has the first spiral cutting edge that the sword inclination is greater than zero degree outside the cutting portion, first spiral cutting edge equals and crisscross setting with the quantity of second spiral cutting edge, and every first spiral cutting edge is greater than the length of cutting portion axis with the sum of the orthographic projection length of adjacent second spiral cutting edge on the cutting portion axis. The utility model provides a vertical milling cutter adopts two kinds of positive and negative sword inclination designs, and the cutter vibration is little when milling, and the edge at cutting position does not have the burr, can obtain better surface finish quality.

Description

Woodworking milling cutter with double helix angle cutting edges

Technical Field

The utility model relates to a cutter technique specifically is a woodworking milling cutter with two helix angle cutting edges.

Background

The edge inclination angle of the circumferential edge of the conventional end mill is only one spiral angle, the larger the helix angle is, the stronger the chip removal capability is, and the sharper the cutter is, but the strength of the cutting edge is low, so when selecting the milling cutter, cutters with different spiral angles are selected according to the material of a processing object. In general, the edge inclination angle of an end mill is a positive angle, and when the tool is used for back milling, cutting is spirally lifted in a chip removal groove, so that chip removal is easy, and therefore, when the tool is used for cutting a workpiece, burrs are generated on the edge of a cutting part of the workpiece, and a deburring process is required subsequently.

In the processing of woodwork, because the cutting is changeed to woodwork, consequently, the sword inclination of milling cutter is bigger, when adopting the countermilling, not only the burr easily appears, can appear collapsing the mouth phenomenon even, causes harmful effects to subsequent processing.

At present, in order to improve the processing efficiency, in the cutting tools used for wooden products, milling cutters with double-helix angle cutting edges are appeared, for example, a double-helix double-edge milling cutter proposed in patent CN201621438218.6, which can obtain larger cutting amount and better surface quality in one process; however, the cutter provided by the patent is of a two-edge structure, the two-edge structure is mostly seen in a key slot milling cutter, due to the fact that the spiral angle is large and chip removal is emphasized excessively, the cutter is easy to vibrate during cutting, the surface quality of a workpiece is relatively poor, two groups of cutting edges with opposite rotation directions are in non-transition connection, after the cutter is used for a period of time, the cutter point part of the second cutting part is worn, an obvious stripe is generated on the surface of the workpiece, and the surface quality of the workpiece is also poor.

Disclosure of Invention

To the problem in the background art, the utility model aims at providing a woodworking milling cutter with two helix angle cutting edges for through the cutting edge of design side set structure, produce the transition of alternating expression overlap joint between the cutting edge of two sets of different soon directions of cutter, thereby obtain higher processingquality, and the cutting edge of every group of cutter all adopts three-tooth or four-tooth structure, cuts stably, efficient.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a woodworking milling cutter with double helical angle cutting edges comprises a cylindrical cutter handle and a cutting part coaxially arranged at one end of the cutter handle, wherein the whole cutting part is of a cylindrical structure, second helical cutting edges with edge inclination angles smaller than zero degree are uniformly distributed at one end, connected with the cutter handle, of an outer cylindrical surface of the cutting part, first helical cutting edges with edge inclination angles larger than zero degree are uniformly distributed at the other end of the outer cylindrical surface of the cutting part, the first helical cutting edges and the second helical cutting edges are equal in number and are arranged in a staggered mode, and the sum of orthographic projection lengths of each first helical cutting edge and the adjacent second helical cutting edge on the axis of the cutting part is larger than the length of the axis of the cutting part; the left side of first spiral cutting edge is equipped with first chip groove, the left side of second spiral cutting edge is equipped with the second chip groove, and the second chip groove is linked together with adjacent first chip groove.

The number of the first spiral cutting edges is more than or equal to three.

The depth of the second chip groove is smaller than that of the first chip groove.

The end surface of the cutting part is provided with evenly distributed bottom edges corresponding to the first spiral cutting edges, and the bottom edges are connected with the corresponding first spiral cutting edges.

The one end that its and cutting portion link to each other of handle of a knife still the cover is equipped with the leading wheel, the diameter of leading wheel is greater than the cutting diameter of cutting portion.

The utility model has the advantages that: the utility model provides a vertical milling cutter adopts two kinds of positive and negative sword inclination designs, and the cutter vibration is little when milling, and the edge at cutting position does not have the burr, can obtain better surface finish quality.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic end view of the cutting portion.

Fig. 3 is a side view of the cutting portion.

1. The tool comprises a tool shank, 2, a cutting part, 3, a guide wheel, 21, a first spiral cutting edge, 22, a second spiral cutting edge, 211, a first chip discharge groove, 222, a second chip discharge groove, 5, a flank face, 6 and a flank face extension part.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, a woodworking milling cutter with double helical cutting edges comprises a cylindrical cutter handle 1 and a cutting part 2 coaxially arranged at one end of the cutter handle 1, wherein the whole cutting part 2 is of a cylindrical structure, second helical cutting edges 22 with edge inclination angles smaller than zero are uniformly distributed at one end of an outer cylindrical surface connected with the cutter handle 1, first helical cutting edges 21 with edge inclination angles larger than zero are uniformly distributed at the other end of the outer cylindrical surface of the cutting part 2, the first helical cutting edges 21 and the second helical cutting edges 22 are equal in number and are arranged in a staggered manner, and the sum of orthographic projection lengths of each first helical cutting edge 21 and the adjacent second helical cutting edge 22 on the axis of the cutting part is greater than the length of the axis of the cutting part; the left side of first spiral cutting edge 21 is the rake face, is equipped with first chip groove 211 at the rake face of first spiral cutting edge 21, the left side of second spiral cutting edge 22 is the rake face, is equipped with second chip groove 222 at the rake face of second spiral cutting edge 22, and second chip groove 222 is linked together with adjacent first chip groove 211.

The number of the first spiral cutting edges 21 is more than or equal to three. The non-keyway milling cutter of the cutter is not suitable for the underdrilling type milling with large tool consumption.

The depth of the second flutes 222 is less than the depth of the first flutes 211. As shown in fig. 3, the right side of the first helical cutting edge 21 is the flank face 5, and the second helical cutting edge 22 and the second chip groove 222 are both provided in the flank face extension 6 of the first helical cutting edge 21, so that the depth of the second chip groove 222 must be smaller than the depth of the first chip groove 211 in view of the tool sharpening process.

As shown in fig. 2, the end surface of the cutting part 2 is provided with evenly distributed bottom edges 23 corresponding to the first spiral cutting edges 21, and the bottom edges 23 are connected with the corresponding first spiral cutting edges 21. The angle and length of the bottom edge can be set according to the situation, for example, a fabrication hole can be arranged in the middle of the bottom edge, and a small amount of drilling milling can be carried out.

As shown in fig. 1, one end of the tool holder 1 connected with the cutting part 2 is further sleeved with a guide wheel 3, and the diameter of the guide wheel 3 is larger than the cutting diameter of the cutting part 2.

Description of the principle:

the negative edge inclination angle relatively improves the strength of the cutting edge, is generally suitable for a cutter with the hardness of a workpiece being not different from that of the cutting edge, and the cutter is not very sharp in cutting.

The part of the utility model not detailed is prior art.

Claims

1. The utility model provides a wood milling cutter with two helix angle cutting edges, includes handle of a knife (1) and the coaxial cutting portion (2) that set up in handle of a knife (1) one end of cylinder type, characterized by: the cutting part (2) is integrally of a cylindrical structure, one end, connected with the cutter handle (1), of the outer cylindrical surface of the cutting part is uniformly provided with second spiral cutting edges (22) with edge inclination angles smaller than zero, the other end of the outer cylindrical surface of the cutting part (2) is uniformly provided with first spiral cutting edges (21) with edge inclination angles larger than zero, the first spiral cutting edges (21) and the second spiral cutting edges (22) are equal in number and are arranged in a staggered mode, and the sum of orthographic projection lengths of each first spiral cutting edge (21) and the adjacent second spiral cutting edge (22) on the axis of the cutting part is larger than the length of the axis of the cutting part; the left side of first spiral cutting edge (21) is equipped with first chip groove (211), the left side of second spiral cutting edge (22) is equipped with second chip groove (222), and second chip groove (222) is linked together with adjacent first chip groove (211).

2. The woodworking milling cutter with double helix corner cutting edges of claim 1, wherein: the number of the first spiral cutting edges (21) is more than or equal to three.

3. The woodworking milling cutter with double helix corner cutting edges of claim 1, wherein: the depth of the second chip groove (222) is smaller than that of the first chip groove (211).

4. The woodworking milling cutter with double helix corner cutting edges of claim 1, wherein: the end face of the cutting part (2) is provided with evenly distributed bottom edges (23) corresponding to the first spiral cutting edges (21), and the bottom edges (23) are connected with the corresponding first spiral cutting edges (21).

5. The woodworking milling cutter with double helix corner cutting edges of claim 1, wherein: the cutter is characterized in that one end of the cutter handle (1) connected with the cutting part (2) is further sleeved with a guide wheel (3), and the diameter of the guide wheel (3) is larger than the cutting diameter of the cutting part (2).