Large-allowance composite expanding reamer special for aviation assembly

Abstract

The utility model belongs to the technical field of reamers, and discloses a special large-allowance composite reamer for aviation assembly, which comprises a guide section, a cutting section, a calibration section and a clamping section which are sequentially arranged from front to back, the guide section, the cutting section and the calibration section are provided with communicated chip guide grooves, the outer wall of the guide section is divided into a plurality of guide edges with equal diameters by the chip guide grooves, the outer wall of the cutting section is divided into a plurality of cutting edges by the chip guide grooves, and the outer wall of the calibration section is divided into a plurality of edge belts by the chip guide grooves; and the cutting edges are gradually enlarged in the direction from front to back. According to the large-allowance composite reamer special for aviation assembly, large-allowance cutting can be achieved in manual machining of an air drill, that is, after a bottom hole is drilled, an ultimate hole can be machined through the composite reamer at a time, and the machining efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of reamer, specifically relates to a big excess compound reamer special for aviation assembly. BACKGROUND

[0002] In the hole processing of aviation assembly, the precision of processed hole and the quality of hole mouth are very high, and due to the processing of air drill, the dependence of workers and tools is relatively high, and in addition, aviation carbon fiber composite material is easy to produce splitting and other problems if processing is improper, so the existing process basically adopts multiple reaming after drilling bottom hole, and finally obtains the final hole. The processing excess of ordinary hand reamer is relatively small, and the processing excess of each cutter is generally about 0.2-0.3mm, when a large hole needs to be processed, multiple reamers are often needed to complete the processing process, resulting in long processing time and low efficiency. And the worker is difficult to operate under special conditions, and even when changing the cutter, improper cooperation may affect the quality of the processed hole. SUMMARY

[0003] The utility model aims at solving the above technical problem at least to some extent. Therefore, the utility model aims at providing a big excess compound reamer special for aviation assembly.

[0004] The utility model adopts the technical scheme that:

[0005] A big excess compound reamer special for aviation assembly comprises a guide section, a cutting section, a calibration section and a clamping section arranged in sequence from front to back, and the guide section, the cutting section and the calibration section are provided with a chip guide groove in communication, the outer wall of the guide section is divided into a plurality of equal-diameter guide edges by the chip guide groove, the outer wall of the cutting section is divided into a plurality of cutting edges by the chip guide groove, and the outer wall of the calibration section is divided into a plurality of edge bands by the chip guide groove.

[0006] Preferably, the cutting edge of the cutting section is provided with a cutting groove, the cutting groove is a conical surface structure, and the positions of the cutting grooves on the cutting edge are not completely consistent. The curvature of one end of the cutting groove close to the blade back of the guide edge is greater than the curvature of the other end of the cutting groove close to the rake face of the guide edge.

[0007] Preferably, the front end of the guide section is provided with a rounded corner. The blade part of the edge band is provided with a reverse taper. The edge band is provided in a spiral.

[0008] The utility model has the beneficial effects that:

[0009] The large excess composite reamer special for aviation assembly can cut in a large excess in the handwork of air drilling, that is, after drilling a bottom hole, the composite reamer can process the final hole in one pass, and the cutting excess can reach about 4-5mm, which greatly improves the processing efficiency and guarantees the processing quality of the hole mouth. The composite reamer can process the following materials by adjusting the tool parameters: pure carbon fiber composite material, laminated material of composite material and aluminum alloy, laminated material of composite material and titanium alloy, aluminum alloy material and titanium alloy material, especially when processing the laminated material of composite material and aluminum alloy or titanium alloy, the composite material can be guaranteed to be free of splitting, and the hole finish of the metal part can reach the technical requirements. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a schematic view of the large excess composite reamer of Example 1.

[0011] Figure 2 is a schematic view of the split cutting groove of Example 1.

[0012] Figure 3 is Figure 1 A-A sectional view of

[0013] Figure 4 is a schematic view of the large excess composite reamer of Example 2.

[0014] In the figure: 1-guiding section; 2-cutting section; 3-calibration section; 4-clamping section; 5-chip guide groove; 6-guiding edge; 7-cutting edge; 8-edge band; 9-split cutting groove; 10-edge back; 11-rake face. DETAILED DESCRIPTION

[0015] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0016] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can be detachable connection, or integrally connected; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements.

[0017] The present application will be further described below in combination with the drawings and specific embodiments.

[0018] Embodiment 1

[0019] As Figure 1 , Figure 2 and Figure 3 shown, the large excess composite reamer special for aviation assembly of the embodiment includes guiding section 1, cutting section 2, calibration section 3 and clamping section 4 arranged in order from front to back; guiding section 1, cutting section 2, calibration section 3 are provided with communicating chip removal grooves 5, and the chip removal grooves 5 are totally provided with four, the front end of guiding section 1 is rounded, and the outer wall of guiding section 1 is divided into four equal-diameter guiding edges 6 by four chip removal grooves 5, and guiding edges 6 are used to realize accurate positioning, so that the tool will not be deviated during machining.Cutting section 2 is divided into four cutting edges 7 by four chip removal grooves 5, and the cutting edges 7 gradually increase in diameter along the direction from front to back, and the angle of cutting edge 7 can be designed according to requirements.Calibration section 3 is divided into four edge bands 8 by four chip removal grooves 5; the edge of edge band 8 is inverted cone, and edge band 8 is spirally arranged, and has a certain spiral angle, which ensures the smoothness of the hole during cutting, and prevents splitting, flanging and burr.

[0020] The cutting edges 7 of cutting section 2 are provided with sub-cutting grooves 9, and the positions of the sub-cutting grooves 9 on the cutting edges 7 are not completely consistent, and the sub-cutting grooves 9 can participate in cutting to share the pressure on the cutting edges 7 during large excess cutting, and are also beneficial to chip breaking and preventing accumulation of waste chips in the chip removal grooves 5.In the embodiment, cutting section 2 includes four circumferentially distributed cutting edges 7, and the positions of the sub-cutting grooves 9 on the oppositely arranged cutting edges 7 are consistent.The sub-cutting groove 9 is a conical surface structure, and the curvature of one end of the sub-cutting groove 9 close to the land 10 of the guiding edge 6 is greater than the curvature of one end of the sub-cutting groove 9 close to the rake face 11 of the guiding edge 6.

[0021] Embodiment 2

[0022] As Figure 4 shown, the large excess composite reamer special for aviation assembly of the embodiment is only different from that in embodiment 1 in that the cutting edges 7 in the embodiment are not provided with sub-cutting grooves.

[0023] The utility model is not limited to the above optional implementation, and anyone can derive other various forms of products under the inspiration of the utility model, but no matter any change in shape or structure, any technical scheme falling within the scope defined by the claims of the utility model falls within the protection scope of the utility model.

Claims

1. A large excess composite expansion reamer for aerospace assembly, characterized by: The tool includes guiding section (1), cutting section (2), calibration section (3) and clamping section (4) arranged in sequence from front to back; guiding section (1), cutting section (2) and calibration section (3) are provided with chip guiding grooves (5) in communication; the outer wall of guiding section (1) is divided into multiple guiding edges (6) of equal diameter by chip guiding grooves (5); the outer wall of cutting section (2) is divided into multiple cutting edges (7) by chip guiding grooves (5); the outer wall of calibration section (3) is divided into multiple edge bands (8) by chip guiding grooves (5); cutting edges (7) gradually increase in size along the direction from front to back; cutting edges (7) of cutting section (2) are provided with sub-cutting grooves (9); sub-cutting grooves (9) are conical surface structures; the positions of sub-cutting grooves (9) on cutting edges (7) are not completely consistent.

2. A large volume compound reamer according to claim 1, wherein: The cutting section (2) includes four circumferentially distributed cutting edges (7); the positions of sub-cutting grooves (9) on the oppositely arranged cutting edges (7) are consistent.

3. A large volume compound reamer according to claim 1 or 2, characterised in that: The curvature of one end of sub-cutting groove (9) close to the relief (10) of guiding edge (6) is greater than the curvature of the other end of sub-cutting groove (9) close to the rake face (11) of guiding edge (6).

4. The large volume compound reamer of claim 1 wherein: The front end of guiding section (1) is rounded.

5. The large volume compound reamer of claim 1 wherein: The edge part of edge band (8) is inverted conical.

6. The large volume compound reamer of claim 1 wherein: The edge band (8) is spirally arranged.

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