Drilling and milling cutter for efficient taper hole machining

Abstract

The utility model discloses a drilling and milling cutter for efficiently machining taper holes, which comprises a handle part for supporting, a tip and two groups of main cutting edges are arranged at the front part of the handle part, the main cutting edges are arranged at the bottom of the tip, and the two groups of main cutting edges are respectively provided with a chip groove with a right-handed rotation 30-degree spiral angle; and the knife back is arranged at the front part of the handle part close to the main cutting edge. The drilling and milling integrated machine tool is of a drilling and milling integrated structure, the drilling function and the hole milling function are integrated, a drill bit part and a milling cutter part are arranged on the tool structure, it can be guaranteed that one tool has the functions of two tools, the number of original three tools is reduced to two tools, the tool changing frequency is reduced, the machining cost is reduced, and the workpiece machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts processing equipment, in particular to a drilling and milling cutter for high-efficiency tapered hole processing. Background Art

[0002] The steering knuckle of an automotive component, commonly known as the "ram's horn", requires a high-precision tapered hole to be drilled on the workpiece. The tapered hole accuracy and the smoothness inside the hole are high, and the coaxiality requirements are also high. The current industry solution is a standard twist drill for rough drilling, a tapered milling cutter for hole expansion, and a tapered reamer to complete the final tapered hole processing. A total of three tools are required to complete the process. However, the tool cost of the above operation method is high, and the tool change frequency is high, resulting in a decrease in processing efficiency. In addition, since multiple tools are used for processing, the error amount generated by each tool processing is superimposed and accumulated, resulting in a decrease in the hole accuracy of the tapered hole, and the coaxiality of the hole is deteriorated. Therefore, an efficient drill and milling cutter for tapered hole processing is urgently needed to solve the above problems. Utility Model Content

[0003] The utility model aims to provide a drilling and milling cutter for high-efficiency tapered hole processing to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the utility model provides the following technical solution: a drilling and milling cutter for high-efficiency tapered hole processing, comprising a shank for support, a tip being arranged at the front of the shank,

[0005] A main cutting edge, the main cutting edge is arranged at the bottom of the top, the main cutting edge is provided with two groups, and both groups of the main cutting edges are provided with a chip removal groove with a right-hand helical angle of 30°;

[0006] A blade back, the blade back being arranged at the front of the shank near the main cutting edge, the blade back and the radial outer edge of the rake face of the chip removal groove forming a secondary cutting edge;

[0007] A milling cutter blade is arranged at the rear of the shank, and an outer peripheral edge back of the milling cutter blade is provided with equidistantly axially arranged inwardly concave chip-dividing grooves.

[0008] Preferably, the tip is set at 140 degrees, and the radial direction of the tip is provided with a first back tool face and a second back tool face, respectively, and the first back tool face is located on the outside of the second back tool face. The tip is set at 140 degrees, which can effectively improve the accuracy and stability when drilling and positioning the automobile steering knuckle. The first back tool face and the second back tool face can reduce cutting friction, provide protection for the main cutting edge, and increase the service life of the tool.

[0009] Preferably, the main cutting edge is arranged at the acute angle structure formed by the axial front cutting edge of the chip groove and the top back cutting edge. The main cutting edge can undertake the main cutting task of the steering knuckle, cut off the chips on the upper part of the steering knuckle, and form a processing contour on the workpiece surface, thereby improving processing efficiency.

[0010] Preferably, the cutting edge of the secondary cutting edge is provided with a cutting band along the spiral direction, and the width of the cutting band is 0.05 times the diameter of the secondary cutting edge. When the cutting band contacts the workpiece surface, the radial runout error of the tool can be reduced, thereby improving the machining accuracy and surface quality of the workpiece.

[0011] Preferably, the shank is cylindrical and the chip breaking groove is semicircular. The semicircular chip breaking groove can achieve excellent chip breaking function by plunge milling and improve machining efficiency while ensuring fast feed.

[0012] Preferably, the side of the milling cutter blade is provided with a tooth-breaking groove, which can quickly discharge the cut chips from the outside of the cutter disc, avoid the accumulation of chips on the cutter disc, and improve the processing efficiency of the workpiece.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model is a drilling and milling integrated structure, which integrates the functions of drilling and milling. The tool structure has a drill bit and a milling cutter part, which can ensure that one tool has the functions of two tools, so that the original three tools are reduced to two, the number of tool changes is reduced, the processing cost is reduced, and the processing efficiency of the workpiece is improved.

[0015] 2. During rough machining, the utility model can meet the requirement of fast feed and realize chip breaking of long chips through the chip breaker groove, which is more conducive to the discharge of iron chips and increases the cutting stability of the tool.

[0016] 3. The utility model is a drill blade without a back-chasing structure, so that the number of times the overall blade of the tool can be sharpened is increased to 3-4 times, thereby reducing the cost of using the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the main body of the utility model;

[0018] Figure 2 It is a side view of the main body of the utility model;

[0019] Figure 3 It is a partial enlarged view of location I of the utility model;

[0020] Figure 4 It is a partial enlarged view of II of the utility model.

[0021] In the figure: 1-top, 2-chip groove, 3-chip dividing groove, 4-shank, 5-back of the knife, 6-milling edge, 7-first back face, 8-second back face, 10-secondary cutting edge, 11-main cutting edge. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 The utility model provides an embodiment: a drilling and milling cutter for high-efficiency tapered hole processing, comprising a shank 4 for support, and a tip 1 is arranged at the front of the shank 4.

[0024] A main cutting edge 11, the main cutting edge 11 is arranged at the bottom of the top 1, and there are two groups of main cutting edges 11, and both groups of main cutting edges 11 are provided with a chip removal groove 2 with a right-handed spiral angle of 30°;

[0025] The blade back 5 is arranged at the front of the shank 4 near the main cutting edge 11, and the blade back 5 and the radial outer edge of the front cutting surface of the chip removal groove 2 form a secondary cutting edge 10;

[0026] The milling cutter blade 6 is arranged at the rear of the shank 4, and the outer peripheral edge back of the milling cutter blade 6 is provided with equidistant and axially arranged inwardly concave chip dividing grooves 3.

[0027] like Figure 1 As shown, the tip 1 is set at 140 degrees, and the radial direction of the tip 1 is provided with a first back tool face 7 and a second back tool face 8, respectively, and the first back tool face 7 is located on the outside of the second back tool face 8. The tip 1 is set at 140 degrees, which can effectively improve the accuracy and stability when drilling and positioning the automobile steering knuckle. The first back tool face 7 and the second back tool face 8 can reduce cutting friction, provide protection for the main cutting edge 11, and improve the service life of the tool.

[0028] like Figure 4 As shown, the main cutting edge 11 is arranged at the acute angle structure formed by the axial front cutting surface of the chip groove 2 and the back cutting surface of the tip 1. The main cutting edge 11 can undertake the main cutting task of the steering knuckle, cut off the chips on the upper part of the steering knuckle, and form a processing contour on the workpiece surface to improve the processing efficiency.

[0029] like Figure 4As shown, the cutting edge of the secondary cutting edge 10 is provided with a cutting band along the spiral direction, and the width of the cutting band is 0.05 times the diameter of the secondary cutting edge 10. When the cutting band contacts the workpiece surface, the radial runout error of the tool can be reduced, thereby improving the machining accuracy and surface quality of the workpiece.

[0030] like Figure 3 As shown, the shank 4 is cylindrical, and the chip breaking groove 3 is semicircular. The semicircular chip breaking groove 3 can achieve excellent plunge milling and chip breaking functions to improve machining efficiency while ensuring fast feed.

[0031] like Figure 1 As shown, the side of the milling cutter blade 6 is provided with a tooth-breaking groove, which can quickly discharge the cut chips from the outside of the cutter disc, avoid the accumulation of chips on the cutter disc, and improve the processing efficiency of the workpiece.

[0032] Working principle: Before use, the user can limit the drill and milling cutter through the handle 4 to the cutter disc inside the machining center, which is convenient for subsequent rapid positioning and connection of the drill and milling cutter. When drilling and milling tapered holes on the automobile steering knuckle, the machining center can drive the cutter disc to rotate at high speed. At this time, the handle 4 can first be positioned to the upper part of the workpiece through the top 1 at the bottom, and then the main cutting edge 11 together with the rear 12 can quickly drill the inside of the workpiece. The debris generated by the drilling is discharged to the outside through the chip groove 2. At this time, the cylindrical hole is punched, and the machining center continues to drive the handle 4 to move downward at a uniform speed. At this time, the milling cutter blade 6 with a conical outer periphery can gradually expand the cavity on the upper part of the cylindrical hole, so that the cylindrical hole on the automobile steering knuckle forms a tapered hole, completing the drilling operation.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drilling and milling cutter for high-efficiency tapered hole machining, comprising a shank (4) for support, wherein a tip (1) is provided at the front of the shank (4), and characterized in that: A main cutting edge (11), the main cutting edge (11) being arranged at the bottom of the tip (1), the main cutting edge (11) being provided with two groups, and both groups of the main cutting edges (11) being provided with a chip removal groove (2) with a right-handed helical angle of 30°; A blade back (5), the blade back (5) being arranged at the front of the shank (4) close to the main cutting edge (11), the blade back (5) and the radial outer edge of the front cutting surface of the chip removal groove (2) forming a secondary cutting edge (10); A milling cutter blade (6), the milling cutter blade (6) being arranged at the rear of the shank (4), and the outer peripheral edge back of the milling cutter blade (6) being provided with equidistantly axially arranged inwardly concave chip dividing grooves (3).

2. The high-efficiency drilling and milling cutter for tapered hole machining according to claim 1, characterized in that: The tip (1) is arranged at 140 degrees, and a first flank face (7) and a second flank face (8) are respectively arranged in a radial direction of the tip (1), and the first flank face (7) is located outside the second flank face (8).

3. The high-efficiency drilling and milling cutter for tapered hole machining according to claim 2, characterized in that: The main cutting edge (11) is arranged at an acute angle structure formed by the axial front cutting edge of the chip removal groove (2) and the rear cutting edge of the tip (1).

4. The high-efficiency drilling and milling cutter for tapered hole machining according to claim 2, characterized in that: The cutting edge of the secondary cutting edge (10) is provided with a cutting edge along the spiral direction, and the width of the cutting edge is 0.05 times the diameter of the secondary cutting edge (10).

5. The high-efficiency drilling and milling cutter for tapered hole machining according to claim 2, characterized in that: The handle (4) is arranged in a cylindrical shape, and the chip dividing groove (3) is arranged in a semicircular shape.

6. The high-efficiency drilling and milling cutter for machining tapered holes according to claim 2, characterized in that: A tooth-breaking groove is provided on the side of the milling cutter blade (6).

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