CN211162113U

CN211162113U - Saw blade milling cutter for machining automobile crankshaft

Info

Publication number: CN211162113U
Application number: CN201922164016.7U
Authority: CN
Inventors: 朱均; 朱敖平; 刘影
Original assignee: Changzhou Yege Tools Co ltd
Current assignee: Changzhou Yege Tools Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-08-04
Anticipated expiration: 2029-12-05

Abstract

The utility model discloses a saw bit milling cutter of processing car bent axle, including the facing cutter, the facing cutter center is equipped with the mounting hole, and both ends are equipped with the chamfer along the circumference around the axial of mounting hole, and the inboard of mounting hole is equipped with a keyway, the facing cutter outside is equipped with a plurality of continuous milling cutter teeth along circumference, every milling cutter tooth medial surface is α with its radial rake angle that radially forms, and it is convex to connect the face between two continuous milling cutter teeth, the intertooth contained angle of two milling cutter teeth is β, the milling cutter tooth forms two different tooth widths along the axial, and outside tooth width is less than inboard tooth width, and big small tooth width transition department is connected with straight inclined plane, milling cutter tooth radial bilateral symmetry controls the angle that two straight inclined plane extension lines formed about, and this saw bit milling cutter integrated into one piece through reasonable profile of tooth design and surperficial carbide coating processing, makes this saw bit processing precision and life all can promote, has obtained great economic benefits.

Description

Saw blade milling cutter for machining automobile crankshaft

Technical Field

The utility model relates to a machinery metalworking cutter field especially relates to the saw bit milling cutter of processing car bent axle.

Background

A milling cutter is a rotating tool with one or more cutter teeth for milling. When in work, each cutter tooth cuts off the allowance of the workpiece in sequence and intermittently. The milling cutter is mainly used for processing planes, steps, grooves, forming surfaces and cutting workpieces on a milling machine. The saw blade milling cutter is a saw blade and a milling cutter, and belongs to both products, and the saw blade milling cutter is mostly made of materials such as high-speed steel and hard alloy with the same performance or the same performance. Although the hard alloy has higher hardness than high-speed steel and strong cutting force, the rotating speed and the feed rate can be improved, and the productivity is improved. But the cutter back-off is not obvious, the cost is higher, and the cutter is easy to break under the condition that the cutting force is rapidly alternated.

The manufacturing materials of the automobile crankshaft are generally high-hardness metal parts such as cast iron or forged steel, so the saw blade milling cutter for processing the automobile crankshaft needs to use high-hardness and high-strength cutter materials, and a proper coating should be attached, which is the first measure for prolonging the service life of the cutter. In addition, improving the tool geometry is also an important means of increasing tool life, especially when milling cast iron.

SUMMERY OF THE UTILITY MODEL

To each item requirement of processing automobile crankshaft, the utility model provides a machining precision is high, long service life's shaping saw bit milling cutter, its technical scheme as follows:

the saw blade milling cutter for machining the automobile crankshaft comprises a milling cutter disc, wherein a mounting hole is formed in the center of the milling cutter disc, chamfers are arranged at the front end and the rear end of the mounting hole in the axial direction along the circumference, a key groove is formed in the inner side of the mounting hole, a plurality of continuous milling cutter teeth are arranged on the outer side of the milling cutter disc along the circumferential direction, a radial front angle formed by the inner side surface of each milling cutter tooth and the radial front angle of each milling cutter tooth is α, the connecting surface between every two continuous milling cutter teeth is in an arc shape, the included angle between the teeth of the two milling cutter teeth is β, the milling cutter teeth form two different tooth widths in the axial direction, the tooth width of the outer side is smaller than that of the inner side, the transition positions of the large tooth width and the.

Furthermore, the radial front foot α ranges from 5 degrees to α degrees and less than 7 degrees, the included angle between teeth β ranges from 60 degrees to β degrees and less than 65 degrees, and the included angle gamma between the two straight inclined planes ranges from 90 degrees to gamma and less than 100 degrees.

Preferably, the number of the milling cutter teeth is 12.

Furthermore, the width of the groove of the key groove is 4mm-6mm, and the length of the groove along the axial direction is 3mm-4 mm.

Furthermore, the outer side tooth width range of the milling cutter tooth is 4.5mm-5mm, and the inner side tooth width range is 8mm-8.5 mm.

Furthermore, the milling cutter head is integrally formed, and the tungsten steel alloy coating is adopted for processing outside the milling cutter head.

The beneficial effects of the utility model reside in that: the utility model discloses shaping saw bit milling cutter surface is handled with tungsten steel alloy coating, has high rigidity, high strength and high abrasion resistance, has effectively prolonged the life of cutter. Meanwhile, the milling cutter teeth are designed into a shape with a narrow outer side and a wide inner side, so that the milling cutter is not easy to break and crush due to overlarge initial force when a cutter is fed by the milling cutter.

Drawings

FIG. 1 is a front view of the formed saw blade milling cutter of the present invention;

FIG. 2 is a radial cross-sectional view of FIG. 1;

marked in the figure as a milling cutter disc 1, a mounting hole 2, a chamfer 3, a key groove 4, milling cutter teeth 5, milling cutter tooth inner side surfaces 6, milling cutter tooth outer side teeth 7, milling cutter tooth inner side teeth 8, radial front feet α, a tooth space included angle β, and a large tooth width and small tooth width connecting straight inclined plane included angle gamma.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

the saw blade milling cutter for machining the automobile crankshaft comprises a milling cutter disc 1, wherein a mounting hole 2 is formed in the center of the milling cutter disc 1, chamfers 3 are arranged at the front end and the rear end of the mounting hole 2 in the axial direction along the circumference, a key groove 4 is formed in the inner side of the mounting hole, a plurality of continuous milling cutter teeth 5 are arranged on the outer side of the milling cutter disc 1 in the circumferential direction, a radial front angle formed by the inner side 6 of each milling cutter tooth 5 and the radial front angle is α, the connecting surface between every two continuous milling cutter teeth 5 is arc-shaped, the included angle between every two teeth of the two milling cutter teeth 5 is β, the milling cutter teeth 5 form two different tooth widths in the axial direction, the tooth width of the outer side tooth 7 is smaller than the tooth width of the inner side tooth 8, the transition positions of the large tooth width and the small tooth width are connected through.

The radial front foot α ranges from 5 degrees to α degrees to 7 degrees, the tooth space included angle β ranges from 60 degrees to β degrees to 65 degrees, and the included angle gamma of the two straight inclined planes ranges from 90 degrees to gamma of 100 degrees.

The width of the groove of the key groove is 4mm-6mm, and the length of the groove along the axial direction is 3mm-4 mm; the outer side tooth width range of the milling cutter tooth is 4.5mm-5mm, and the inner side tooth width range is 8mm-8.5 mm.

Preferably, the number of the milling cutter teeth is 12.

Preferably, α =5 °, β =60 °, γ =90 °.

Preferably, the width of the slot of the key groove is 4mm, the axial length of the key groove is 3mm, the tooth width of the outer side of the milling cutter tooth is 4.763mm, and the tooth width of the inner side of the milling cutter tooth is 8 mm.

The utility model discloses shaping saw bit milling cutter is integrated into one piece, and its outside adopts tungsten steel alloy coating to handle, adds man-hour to automobile crankshaft, and facing cutter dish and bent axle wait to process the section and set up relatively, and relative rotation is slow simultaneously and is fed. The milling cutter teeth are narrow outside and wide inside, so that the cutting edge is not easy to break when the cutter is used, tungsten steel alloy is used for coating treatment on the surface, the saw blade milling cutter has high hardness, high strength and high wear resistance, and the processing of forged steel crankshafts or nodular cast iron crankshafts can be completed.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The above description is only a preferred collective embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes and substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The saw blade milling cutter for machining the automobile crankshaft comprises a milling cutter disc and is characterized in that a mounting hole is formed in the center of the milling cutter disc, chamfers are arranged at the front end and the rear end of the mounting hole in the axial direction along the circumference, a key groove is formed in the inner side of the mounting hole, a plurality of continuous milling cutter teeth are arranged on the outer side of the milling cutter disc in the circumferential direction, a radial front angle formed by the inner side surface of each milling cutter tooth and the radial front angle of each milling cutter tooth is α, a connecting surface between every two continuous milling cutter teeth is in an arc shape, an included angle between teeth of the two milling cutter teeth is β, the milling cutter teeth form two different tooth widths in the axial direction, the tooth width on the outer side is smaller than that on the inner side, the transition positions of the large tooth width and the small tooth.

2. The saw blade milling cutter for machining an automobile crankshaft as claimed in claim 1, wherein: the number of teeth of the milling cutter teeth is 12.

3. The saw blade milling cutter for machining automobile crankshafts according to claim 1, wherein said radial rake angle α is in the range of 5 ° - α ° -7 °.

4. The saw blade milling cutter for machining automobile crankshafts as claimed in claim 1, wherein said included tooth space angle β is in the range of 60 ° - β ° -65 °.

5. The saw blade milling cutter for machining an automobile crankshaft as claimed in claim 1, wherein: the included angle gamma of the two straight inclined planes is more than or equal to 90 degrees and less than or equal to 100 degrees.

6. The saw blade milling cutter for machining an automobile crankshaft as claimed in claim 1, wherein: the width of the groove of the key groove is 4mm-6mm, and the length of the groove along the axial direction is 3mm-4 mm.

7. The saw blade milling cutter for machining an automobile crankshaft as claimed in claim 1, wherein: the outer side tooth width range of the milling cutter tooth is 4.5mm-5mm, and the inner side tooth width range is 8mm-8.5 mm.

8. The saw blade milling cutter for machining an automobile crankshaft as claimed in claim 1, wherein: the milling cutter head is integrally formed, and the outer portion of the milling cutter head is treated by adopting a tungsten steel alloy coating.