Eccentric positive and negative integrated boring and milling cutter

Abstract

The utility model discloses an eccentric positive and negative integrated boring and milling cutter, and relates to the technical field of boring and milling cutters. The cutter comprises a mounting part, a stop part, a cutter bar part, a cutter head part and a blade bearing part which are integrally formed, a blade I and a blade II are respectively mounted on the blade bearing part; the cutter bar part is of a cylindrical or ellipse-like structure, and the axis of the cutter bar part and the axis of the mounting part form an eccentric or concentric structure; the tool bit part and the tool bar part form an eccentric structure, and one side of the tool bit part is tangent to the outer side of the tool bar part; the first blade and the second blade incline towards the two sides respectively, and the main cutting edge faces of the first blade and the second blade and the axis of the cutter bar part are located in the same plane. The first blade and the second blade are installed on the blade bearing portion respectively, so that the end faces of the two sides in the gear portion can be machined on the same vertical machining center device only through one tool, roughness is guaranteed, and meanwhile the influence on the device precision is removed; the machining efficiency is well guaranteed, and the tool cost input is controlled.

Description

Technical Field

[0001] The utility model belongs to the technical field of boring and milling cutters, in particular to an eccentric positive and negative integrated boring and milling cutter. Background Art

[0002] The machining industry often uses countersinks, end mills, and reverse milling cutters to process the two end faces inside small structural parts. For some structural parts where the end milling cutter feed space is insufficient, positive and negative eccentric milling cutters or countersinks are required for processing. When some structural parts cannot meet the requirements of end milling of both sides of the internal end faces, a positive eccentric milling cutter is generally used to process one end face, and then a reverse eccentric milling cutter is replaced to process the other end face, which increases the tool cost and reduces the processing efficiency. In addition, when using double-sided countersinks for processing, the end faces are prone to vibration and poor roughness, and the large contact surface and high resistance have a serious impact on the accuracy of the equipment. Utility Model Content

[0003] The utility model aims to provide an eccentric forward and reverse integrated boring and milling cutter. By installing a blade one and a blade two on the blade seat respectively, it is achieved on the same vertical machining center equipment that only one tool is used to complete the processing of the end faces on both sides of the stop portion, thereby ensuring the roughness while eliminating the influence on the equipment accuracy; the processing efficiency is well guaranteed and the tool cost investment is controlled.

[0004] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0005] The utility model discloses an eccentric forward and reverse integrated boring and milling cutter, which comprises an integrally formed mounting portion, a stopper portion, a tool bar portion, a tool head portion and a blade seat portion; a blade 1 and a blade 2 are respectively mounted on the blade seat portion.

[0006] Furthermore, the shank portion is cylindrical or elliptical in shape, and the axis of the shank portion is eccentric or concentric with the axis of the mounting portion.

[0007] Furthermore, the cutter head portion and the cutter shaft portion are in an eccentric structure, and one side of the cutter head portion is tangent to the outer side of the cutter shaft portion.

[0008] Furthermore, the blade one and the blade two are inclined toward two sides respectively, and the main cutting edge surfaces of the blade one and the blade two are in the same plane with the axis of the shank portion.

[0009] Furthermore, after installation, the main cutting edges of the blade 1 and the blade 2 form an inclination within 5° with the perpendicular line of the axis passing through the blade tip.

[0010] The utility model has the following beneficial effects:

[0011] The utility model installs the blade one and the blade two on the blade seat respectively, so that only one tool is used to complete the processing of the end faces on both sides of the stop part on the same vertical machining center equipment, thereby ensuring the roughness while eliminating the influence on the equipment accuracy; the processing efficiency is well guaranteed and the tool cost investment is controlled.

[0012] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 This is a schematic diagram of the structure of the boring and milling cutter of the utility model;

[0015] Figure 2 for Figure 1 Side view;

[0016] Figure 3 for Figure 1 Main view;

[0017] Figure 4 This is a schematic diagram of the processed product of the utility model. DETAILED DESCRIPTION

[0018] 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 of 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.

[0019] In the description of the present invention, it should be understood that terms such as "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limitations on the present invention.

[0020] See also Figure 1-2As shown, the utility model is an eccentric forward and reverse integrated boring and milling cutter, comprising an integrally formed mounting portion 1, a stop portion 2, a shank portion 3, a cutter head portion 4, and a blade seat portion 5; a blade 1 51 and a blade 2 52 are respectively mounted on the blade seat portion 5.

[0021] The shank portion 3 is cylindrical or elliptical in shape; the cutter head portion 4 and the shank portion 3 are eccentric in structure, and one side of the cutter head portion 4 is tangent to the outer side of the shank portion 3 .

[0022] The blade 1 51 and the blade 2 52 are inclined toward two sides respectively, and the main cutting edge surfaces of the blade 1 51 and the blade 2 52 are in the same plane with the axis of the shank, that is, a 0° front angle and a 0° cutting edge inclination angle.

[0023] After installation, the main cutting edges of the blade 1 51 and the blade 2 52 are inclined within 5° with the vertical line passing through the axis of the blade tip, that is, Figure 3 β in .

[0024] Based on the above, Figure 3-4 As shown, A<D1-1; A'<D1 / 2-blade width / 3; B>D2-D1 / 2+2; L0<H-(cutting allowance*2); L>H0.

[0025] in Figure 4 The two inner planes of the corresponding stop part need to be processed, D1 is the diameter of the via hole that needs to pass through, and D2 is the diameter covered by the inner plane that needs to be processed.

[0026] In this case, D1=φ55mm, D2=φ90mm, H=54mm, H0=91mm;

[0027] At this time, the design diameter of the mounting portion 1 is ≥ the maximum diameter of the shank portion 3, and the axial length is recommended to be 65-75mm; the size of the shank portion 3 is φ40mm*70mm, the size of the stop portion 2 is φ60mm*8mm, and the axis of the shank portion 3 is concentric with the axis of the mounting portion 1, the eccentricity is 0, the axial length L=100, and the radial dimensions in the X and Y directions are 35 and 25 respectively. In order to enable the eccentric shank portion 3 and the cutter head portion 4 to pass through the inner hole of D1, and to meet the requirement that the cutting width is less than the blade width when the axial cutting is performed, and at the same time, the diameter range of D2 can be covered during circular milling, both blade 1 51 and blade 2 52 use diamond-shaped blades with a width of 12mm, i.e., CCMT120408 blades, and A=47.5, A'=23, B=22.5, L0=40.0, and L=95 are selected through calculation of design key points. For this purpose, the tool bar can be used for both rough and fine machining. The design selects the blade inclination angle θ to be 0° and the main deflection angle β to be 5°; the size of the blade seat 5 is adapted and designed according to the ISO standard blade size; blade one 51 is used for forward machining, and blade two 52 is used for reverse back machining.

[0028] The use process of the utility model is as follows: first, the eccentric tool bar is assembled and fixed with a suitable tool handle (such as lateral fixing and pressing), and is installed into the machine tool equipment, the machine tool spindle is oriented, and the eccentric direction of the blade is Figure 4 Down, move upward B / 2, so that the axis of the tool head coincides with the axis of the through hole D1, move the spindle into the inner side of the gear part, so that the axial center of L0 is aligned with the axial center of H, and reverse (toward Figure 4 The tool is then milled radially to cover the D2 surface, and circular milling is performed with a radius of (D2-AB) / 2. After the cutting is completed, the axial center of L0 is moved to coincide with the center of H, and the axis of the shank is moved radially to coincide with the axis of the through hole D1. At this time, the tool returns to the initial cutting point, and reverse back boring and milling is performed in the same cutting method. After the processing is completed and the tool returns to the axial center of the stop and the center of D1, the spindle is oriented, and the blade is facing Figure 1 At the bottom, move B / 2 upward to make the axis of the tool head coincide with the axis of the through hole D1, move the tool axially away from the stop, and then return to the machine tool origin to complete the boring and milling of the end faces on both sides of the stop.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An eccentric forward and reverse integrated boring and milling cutter, characterized in that: It comprises an integrally formed mounting portion (1), a stop portion (2), a knife bar portion (3), a knife head portion (4), and a blade seat portion (5); The blade seat portion (5) is respectively mounted with a blade one (51) and a blade two (52).

2. The eccentric forward and reverse integrated boring and milling cutter according to claim 1, characterized in that: The shank portion (3) is cylindrical or elliptical in structure, and the axis of the shank portion (3) is eccentric or concentric with the axis of the mounting portion (1).

3. The eccentric forward and reverse integrated boring and milling cutter according to claim 1, characterized in that: The cutter head portion (4) and the cutter bar portion (3) form an eccentric structure, and one side of the cutter head portion (4) is tangent to the outer side of the cutter bar portion (3).

4. The eccentric forward and reverse integrated boring and milling cutter according to claim 1, characterized in that: The blade one (51) and the blade two (52) are inclined toward two sides respectively, and the main cutting edge surfaces of the blade one (51) and the blade two (52) are in the same plane with the axis of the shank.

5. The eccentric forward and reverse integrated boring and milling cutter according to claim 1, characterized in that: After installation, the main cutting edges of the blade 1 (51) and the blade 2 (52) form an inclination within 5° with the perpendicular line of the axis passing through the blade tip.

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