Drilling and reaming combined integrated cutter for machining rivet mounting hole

Abstract

The utility model discloses a drilling and reaming composite integrated cutter for rivet mounting hole processing, which comprises a hard alloy bar cutter body, the hard alloy bar cutter body comprises a drilling structure part and a reaming structure part which are sequentially arranged from front to back, the drilling structure part is of a two-edge twist drill structure, a drill tip part adopts a double-plane rear angle, and the reaming structure part adopts a double-plane rear angle. The first rear angle alpha 1 is equal to 10-20 degrees, the second rear angle alpha 2 is equal to 20-30 degrees, and the width X of the first rear tool face is equal to (0.02-0.05) d1; the reaming structure part is of a two-edge reamer structure, the reaming allowance ranges from 0.05 mm to 0.1 mm, a cutting cone part of the reaming structure part adopts a double-plane relief angle, the first relief angle is alpha3 which ranges from 10 degrees to 20 degrees, the second relief angle is alpha4 which ranges from 20 degrees to 30 degrees, the width X of a first relief face ranges from 0.02 d to 0.05 d, a circumferential edge part of the reaming structure part adopts a single-plane relief angle, and the relief angle alpha5 ranges from 20 degrees to 25 degrees. The problems that an existing tool for machining rivet mounting holes is low in machining precision and single in function are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of tool for processing, especially a drill and reamer composite integrated tool for rivet mounting hole processing. BACKGROUND

[0002] At present, the manufacturing process of the rivet mounting hole of the aircraft wing in the aircraft manufacturing industry in China is mostly drilling - reaming - reaming - counterboring, and the size precision of the processed hole is low, the position precision of the hole is low, the cylindricity of the hole is low, and the roughness value of the hole wall is large. In order to improve the hole making process level of the rivet mounting hole of the aircraft wing in the aircraft industry in China, improve the size precision of the hole, the position precision of the hole, the cylindricity of the hole after the rivet mounting hole is processed, reduce the roughness value of the rivet mounting hole wall, and improve the hole processing efficiency, the tool for processing the existing rivet mounting hole needs to be improved. SUMMARY

[0003] The utility model discloses a kind of drill and reamer composite integrated tool for rivet mounting hole processing, solve the problem of low machining precision of existing tool for rivet mounting hole processing, single function.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] A kind of drill and reamer composite integrated tool for rivet mounting hole processing, including hard alloy bar tool body, the hard alloy bar tool body includes the reaming structure department and the reaming structure department that are sequentially arranged from front to back, the reaming structure department is two-blade twist drill structure, drill tip portion adopts double plane clearance, first clearance is α1=10 °~20 °, second clearance is α2=20 °~30 °, first clearance face width is X=(0.02~0.05) d1;The reaming structure department is two-blade reamer structure, reaming allowance=0.05~0.1 mm, the cutting cone portion of the reaming structure department adopts double plane clearance, first clearance is α3=10 °~20 °, second clearance is α4=20 °~30 °, first clearance face width is X=(0.02~0.05) d, the peripheral blade portion of the reaming structure department adopts single plane clearance, and its clearance is α5=20 °~25 °, and reamer blade width is X=(0.03~0.04) d.

[0006] The tool structure is the composite tool that the function of two-blade twist drill and two-blade reamer is integrated in one, the tool saves the time of replacing reamer, improves the position precision of processed hole, saves reaming process, improves efficiency, has the advantages of high cost performance, good life, etc., wherein the cutting cone portion of the reaming structure department is the end blade portion of the reamer structure department, all cutting edges are coated with anti-adhesion, wear-resistant multilayer composite coating (such as DLC coating diamond-like coating or TaC hydrogen-free diamond-like coating), to improve the wear resistance of tool.

[0007] As a further preferred embodiment of the present application, the hard alloy rod cutter body core thickness is designed as dc=(0.35-0.45)d1, the width-to-width ratio of the chip space and the land is designed as M=(1.5-2.0):1, and d1=d-(0.1-0.2)mm.

[0008] As a further preferred embodiment of the present application, the groove type of the hard alloy rod cutter body is a parabolic spiral groove type, the spiral groove type groove rake angle is designed as γ=8°-16°, and the spiral groove spiral angle is designed as β=35°-40°.

[0009] The parabolic spiral groove type improves the cutting performance and chip removal performance, and improves the structural strength of the cutting part.

[0010] As a further preferred embodiment of the present application, the spiral groove of the hard alloy rod cutter body is provided with a negative chamfer around the groove, the negative chamfer angle around the groove is designed as γ1=-5°-+5°, and the negative chamfer angle width around the groove is designed as m=0.1-0.5mm.

[0011] As a further preferred embodiment of the present application, the front and rear rake surface roughness of the hard alloy rod cutter body reaches Ra0.2.

[0012] The blade edge is prevented from sticking chips.

[0013] As a further preferred embodiment of the present application, the number of teeth of the hard alloy rod cutter body is 2.

[0014] As a further preferred embodiment of the present application, the peripheral edge part of the reaming structure part is a calibration part, and the calibration part adopts the sizing band structure of a reamer, and the sizing band length L4=3-5mm.

[0015] The purpose of the sizing band is to control the size of the reaming of the drill-reamer combined integrated cutter after multiple grinding.

[0016] Compared with the prior art, the present application can achieve at least one of the following beneficial effects:

[0017] 1. The cutter structure is a combined cutter integrating the functions of a two-blade twist drill and a two-blade reamer, which saves the time for replacing the reamer, improves the position accuracy of the machined hole, saves the reaming process, improves the efficiency, has high cost performance, good service life and other advantages, wherein the cutting cone part of the reaming structure part is the end edge part of the reamer structure part, all the cutting edges are coated with an anti-adhesion and wear-resistant multilayer composite coating (such as a DLC coating or a TaC hydrogen-free diamond coating) to improve the wear resistance of the cutter.

[0018] 2. The parabolic spiral groove type improves the cutting performance and chip removal performance, and improves the structural strength of the cutting part. The spiral groove angle of the spiral groove type is designed as γ=8°-16° after the negative chamfering.

[0019] 3. The surface roughness of the front and rear rake surfaces of the hard alloy rod tool body reaches Ra0.2, which can prevent chip adhesion.

[0020] 4. The purpose of the fixed diameter zone is to control the size of the reaming of the drill-reaming combined tool after multiple grinding. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic view of the utility model.

[0022] Figure 2 It is a B view of Figure 1

[0023] Figure 3 It is a C enlarged view of Figure 2

[0024] Figure 4 It is an A enlarged view of Figure 1

[0025] Figure 5 It is a D-D enlarged view.

[0026] Figure 6 It is an E enlarged view of Figure 2 DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0029] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0030] ​​​​It should be noted that like numerals and letters refer to like items throughout the several views, and once an item is defined in one view, it should not require further defining and explaining in subsequent views.

[0031] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relation shown in the drawings, or is the orientation or position relation commonly placed when the utility model product is used, or is the orientation or position relation commonly understood by the person skilled in the art, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0032] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. Specific embodiment 1:

[0034] Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 A drill and reamer composite integrated tool for rivet mounting hole processing is shown, comprising a hard alloy bar tool body, the hard alloy bar tool body comprises a drilling structure part and a reaming structure part arranged in sequence from front to back, the drilling structure part is a two-blade twist drill structure, the drill tip part adopts double plane clearance angle, the first clearance angle is alpha1=10~20°, the second clearance angle is alpha2=20~30°, the first clearance face width is X=(0.02~0.05)d1; the reaming structure part is a two-blade reamer structure, the reaming allowance is 0.05~0.1mm, the cutting cone part of the reaming structure part adopts double plane clearance angle, the first clearance angle is alpha3=10~20°, the second clearance angle is alpha4=20~30°, the first clearance face width is X=(0.02~0.05)d, the peripheral blade part of the reaming structure part adopts single plane clearance angle, the clearance angle is alpha5=20~25°, and the reamer blade width is X=(0.03~0.04)d.

[0035] The tool structure is a composite tool integrating the functions of two-blade twist drill and two-blade reamer, which saves the time for replacing the reamer, improves the position accuracy of the machined hole, saves the reaming process, improves the efficiency, has high cost performance, long service life and other advantages, wherein the cutting cone part of the reaming structure part is the end blade part of the reamer structure part, all the cutting edges are coated with anti-adhesion and wear-resistant multi-layer composite coating (such as DLC coating diamond-like coating or TaC hydrogen-free diamond-like coating) to improve the wear resistance of the tool. Specific embodiment 2:

[0037] This embodiment further describes the hard alloy bar tool body on the basis of specific embodiment 1, the core thickness of the hard alloy bar tool body is designed as dc=(0.35-0.45)d1, the width-to-width ratio of the chip pocket and the land is designed as M=(1.5-2.0):1, and d1=d-(0.1-0.2)mm. Specific embodiment 3:

[0039] This embodiment further describes the hard alloy bar tool body on the basis of specific embodiment 1, the groove type of the hard alloy bar tool body adopts a parabolic spiral groove type, the spiral groove type front angle is designed as γ=8°-16°, and the spiral groove spiral angle is designed as β=35°-40°.

[0040] The parabolic spiral groove type improves the cutting performance and chip removal performance, and improves the structural strength of the cutting part. Here, the spiral groove type front angle γ=8°-16° is designed after the negative chamfer is removed. Specific embodiment 4:

[0042] This embodiment further describes the hard alloy bar tool body on the basis of specific embodiment 3, the spiral groove of the hard alloy bar tool body is chamfered, the negative chamfer angle of the spiral groove is designed as γ1=-5°-+5°, and the negative chamfer angle width of the spiral groove is designed as m=0.1-0.5mm. Specific embodiment 5:

[0044] This embodiment further describes the hard alloy bar tool body on the basis of specific embodiment 1, the front and rear tool surface roughness of the hard alloy bar tool body reaches Ra0.2.

[0045] Prevent the blade edge from sticking. Specific embodiment 6:

[0047] This embodiment further describes the hard alloy bar tool body on the basis of specific embodiment 1, the number of teeth of the hard alloy bar tool body is 2. Specific embodiment 7:

[0049] This embodiment is further explained on the basis of the specific embodiment 1 for the peripheral edge part of the reaming structure part, which is the calibration part, and the calibration part adopts the sizing band structure of the reamer, and the sizing band length L4=3-5mm.

[0050] The purpose of leaving the sizing band is to control the size of the drill and reamer combined integrated tool after multiple grinding.

[0051] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A drill-reamer composite one-piece tool for rivet hole machining, characterized by: The hard alloy rod cutter body comprises a drilling structure part and a reaming structure part arranged in sequence from front to back, the drilling structure part is a two-blade twist drill structure, the drill tip part adopts double plane clearance angles, the first clearance angle is α1=10°-20°, the second clearance angle is α2=20°-30°, and the first clearance face width is X=(0.02-0.05)d1; the reaming structure part is a two-blade reamer structure, the reaming allowance is 0.05-0.1 mm, the cutting cone part of the reaming structure part adopts double plane clearance angles, the first clearance angle is α3=10°-20°, the second clearance angle is α4=20°-30°, the first clearance face width is X=(0.02-0.05)d, the peripheral edge part of the reaming structure part adopts a single plane clearance angle, the clearance angle is α5=20°-25°, and the reamer blade width is X=(0.03-0.04)d.

2. The drill-reamer composite one-piece tool for rivet mounting hole machining according to claim 1, characterized in that: The hard alloy rod cutter body core thickness is designed as dc=(0.35-0.45)d1, the flute width to land width ratio is designed as M=(1.5-2.0):1, and d1=d-(0.1-0.2)mm.

3. The drill-reamer composite one-piece tool for rivet mounting hole machining according to claim 1, characterized in that: The groove type of the hard alloy rod cutter body adopts a parabolic spiral groove type, the spiral groove type groove angle is designed as γ=8°-16°, and the spiral groove spiral angle is designed as β=35°-40°.

4. The drill-reamer composite one-piece tool for rivet mounting hole machining according to claim 3, characterized in that: The spiral groove of the hard alloy rod cutter body is negatively chamfered, the groove peripheral negative chamfer angle is designed as γ1=-5°-+5°, and the groove peripheral negative chamfer angle width is designed as m=0.1-0.5mm.

5. The drill-reamer composite one-piece tool for rivet mounting hole machining according to claim 1, characterized in that: The front and rear clearance face surface roughness of the hard alloy rod cutter body reaches Ra0.

2.

6. The drill-reamer composite one-piece tool for rivet mounting hole machining according to claim 1, characterized in that: The hard alloy rod cutter body has 2 teeth.

7. The drill-reamer composite one-piece tool for rivet mounting hole machining according to claim 1, characterized in that: The peripheral edge part of the reaming structure part is a calibration part, the calibration part adopts a reamer sizing band structure, and the sizing band length L4=3-5mm.

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