Reamer for machining inner hole in satellite carbon fiber part

Abstract

The utility model provides a reamer for machining an inner hole in a satellite carbon fiber part. The reamer comprises a clamping part, a cutter bar, a first side cutting edge, a second side cutting edge and a notch. The cutter bar is connected with the clamping part and comprises a side cutting part and a bottom face, and a chamfer is formed between the side cutting part and the bottom face. The first side cutting edge is arranged at the position, close to the bottom face, of the side cutting part, the chamfer is connected with the first end of the first side cutting edge and the outer edge of the bottom face, and the top surface of the first side cutting edge is an arc face. The at least one second side cutting edge is arranged at the position, deviating from the bottom face, of the side cutting part, the top surface of the second side cutting edge is provided with a protruding edge, and the protruding edge and the second side cutting edge extend in the same direction. The notch is formed in the side cutting part and located between the first side cutting edge and the second side cutting edge. By means of segmented cutting, abrasion to the reamer can be reduced, cutting efficiency can be guaranteed, and meanwhile the accuracy of the overall position of an inner hole of a part is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a reamer used for processing inner holes in satellite carbon fiber parts. Background Art

[0002] Carbon fiber composite materials (such as those in satellites) are widely used in the manufacture of special parts in the aerospace field due to their advantages of high strength, low density, high modulus, high temperature resistance and low thermal expansion coefficient. When processing the inner holes in such carbon fiber parts, due to the material properties of carbon fiber composite materials, severe wear will be caused to the tool during mechanical precision processing. Therefore, carbon fiber composite materials are a difficult material to process. For reaming, the conventional method uses an integral reamer for reaming, which generates large cutting resistance and causes severe wear to the reamer. Parts made of carbon fiber composite materials may include inner holes with a large aspect ratio (ratio of length to diameter), such as an inner hole with a diameter of 6 mm and a length of 24 mm. In the process of reaming such large aspect ratio inner holes in carbon fiber parts, the wear of the reamer heads of various materials is particularly severe, resulting in a reamer usually only being able to process one qualified inner hole, and then the reamer must be replaced due to severe wear.

[0003] Due to the serious wear of the reamer, a reamer cannot continuously process multiple qualified parts, resulting in low processing efficiency, poor accuracy of the overall position of the inner hole of the part, high reamer cost, etc. Therefore, an improved reamer and related methods are needed to overcome at least some of the above technical problems. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defects in the prior art that, when processing inner holes with a relatively large aspect ratio, conventional reamers are severely worn, resulting in poor accuracy of the overall position of the inner hole of the part, high replacement cost and low processing efficiency, thereby providing a reamer for processing inner holes in satellite carbon fiber parts.

[0005] The utility model provides a reamer for processing inner holes in satellite carbon fiber parts, comprising:

[0006] Clamping part;

[0007] A knife bar connected to the clamping portion, comprising a side cutting portion and a bottom surface, wherein a chamfer is formed between the side cutting portion and the bottom surface;

[0008] a first side cutting edge, arranged on the side cutting portion at a position close to the bottom surface, the chamfer connecting the first end of the first side cutting edge and the outer edge of the bottom surface, and the top surface of the first side cutting edge being a curved surface;

[0009] a second side cutting edge, at least one of the second side cutting edges being arranged on the side cutting portion at a position away from the bottom surface, the top surface of the second side cutting edge having a convex ridge, the convex ridge and the second side cutting edge extending in the same direction;

[0010] A notch is arranged on the side cutting portion and is located between the first side cutting edge and the second side cutting edge.

[0011] Optionally, a first surface is arranged between the notch and the first side cutting edge, and a second surface is arranged between the notch and the second side cutting edge, and both the first surface and the second surface are parallel to the radial direction of the tool rod.

[0012] Optionally, at least two of the second side cutting edges are arranged on the side cutting portion at a position away from the bottom surface, and the notch is arranged between two adjacent second side cutting edges.

[0013] Optionally, at least two of the side cutting portions are spaced apart along the circumferential direction of the knife rod, and the side cutting portions extend along the axial direction of the knife rod.

[0014] Optionally, the side cutting portion is a straight cutting edge.

[0015] Optionally, the side cutting portion is a spiral cutting edge.

[0016] The utility model has the following advantages:

[0017] The utility model provides a reamer for processing inner holes in satellite carbon fiber parts, comprising: a clamping portion, a tool rod, a first side cutting edge, a second side cutting edge and a notch. The tool rod is connected to the clamping portion, and comprises a side cutting portion and a bottom surface, and a chamfer is provided between the side cutting portion and the bottom surface. The first side cutting edge is arranged on the side cutting portion at a position close to the bottom surface, the chamfer connects the first end of the first side cutting edge with the outer edge of the bottom surface, and the top surface of the first side cutting edge is an arc surface. At least one second side cutting edge is arranged on the side cutting portion at a position away from the bottom surface, and the top surface of the second side cutting edge has a convex ridge, and the convex ridge extends in the same direction as the second side cutting edge. The notch is arranged on the side cutting portion and is located between the first side cutting edge and the second side cutting edge.

[0018] The clamping part is used to connect and fix with the processing machine tool, and then the processing machine tool drives the clamping part and the tool bar to move and perform milling. When processing the inner hole, the bottom surface and the first side cutting edge enter the inner hole first. Due to the setting of the chamfer, the bottom surface and the first side cutting edge are subject to less resistance from the inner hole, so that it can be ensured that they can smoothly enter the inner hole without damaging the inner hole. When the tool bar is further extended into the inner hole, the notch and the second side cutting edge enter the inner hole in turn, and the notch will not contact the side wall of the inner hole. The second side cutting edge can process the side wall of the inner hole when entering and advancing. It should be noted that since the top surface of the first side cutting edge is an arc surface, this reduces the cutting ability of the first side cutting edge, reduces the resistance of the inner hole to the first side cutting edge, and thus reduces the degree of wear of the first side cutting edge. During the processing, the first side cutting edge is mainly used for support, positioning and guiding. Since the top surface of the second side cutting edge has a ridge, the cutting ability of the second side cutting edge is improved, and the edge of the ridge is where the notch is located, so the edge of the ridge can also cut the surface of the inner hole during the advancement process, so that the inner wall of the inner hole can be cut by the ridge, thereby removing a thin layer of surface material of the inner hole.

[0019] Therefore, the reamer provided by the utility model can complete the cutting work of the inner hole through the cooperation of the first side cutting edge, the notch and the second side cutting edge, which can not only reduce the wear of the reamer, but also ensure the cutting efficiency, and at the same time improve the overall position accuracy of the inner hole of the part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of a reamer in the prior art is shown;

[0022] Figure 2 A schematic diagram of the structure of another reamer in the prior art is shown;

[0023] Figure 3 A schematic diagram of the structure of another reamer in the prior art is shown;

[0024] Figure 4 The structural schematic diagram of the reamer in this embodiment is shown;

[0025] Figure 5 A schematic structural diagram of another reamer in this embodiment is shown;

[0026] Figure 6 A schematic structural diagram of another reamer in this embodiment is shown;

[0027] Figure 7 A flow chart of the method for customizing a reamer in this embodiment is shown.

[0028] Description of reference numerals:

[0029] 10. first reamer; 12. first clamping portion; 14. first shank; 16. side cutting edge; 18. bottom cutting edge; 20. second reamer; 22. second clamping portion; 24. second shank; 26. side cutting edge; 28. bottom cutting edge; 30. third reamer; 32. third clamping portion; 34. third shank; 36. side cutting edge; 38. bottom cutting edge;

[0030] 102, clamping portion; 104, tool rod; 106, side cutting portion; 107, first side cutting edge; 108, bottom surface; 109, chamfer; 110, second side cutting edge; 111, convex ridge; 112, notch; 113, first surface; 114, second surface. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] A reamer is a rotary tool with one or more straight cutting edges or spiral cutting edges, which is used for finishing and semi-finishing of inner holes. A reamer is used to remove a thin layer of surface material of an existing inner hole, and is generally used for expanding or repairing holes to improve the machining accuracy of the inner hole and reduce the roughness of its surface. The inner hole processed by the reamer can obtain precise size and shape. A conventional reamer includes a clamping portion and a tool bar. The clamping portion is configured to be clamped by a machining machine so that the reamer can be used to ream holes. The tool bar includes a side surface and a bottom surface. The tool bar includes one or more side cutting edges located on the side surface. The one or more side cutting edges are evenly spaced in the circumferential direction. The tool bar also includes one or more bottom cutting edges corresponding to the one or more side cutting edges, each bottom cutting edge being located at the intersection of the corresponding side cutting edge and the bottom surface. Each side cutting edge includes a cutting edge leading edge, a cutting edge trailing edge, and a cutting edge top surface extending between the cutting edge leading edge and the cutting edge trailing edge. The one or more side cutting edges located on the side surface may be straight cutting edges or spiral cutting edges. During machining, conventional reamers utilize one or more bottom cutting edges to cut away a thin layer of surface material of an existing inner hole.

[0036] Before introducing the reamer provided by the utility model for processing the inner hole in the satellite carbon fiber part, the reamer in the prior art is firstly illustrated by example. Figure 1 , Figure 2 and Figure 3 Introducing three common types of reamers.

[0037] like Figure 1A conventional reamer 10 is shown, and the first reamer 10 includes a first clamping portion 12 and a first shank 14. The first clamping portion 12 is configured to be clamped by a machining machine so as to use the first reamer 10 to perform reaming. The first shank 14 includes six side cutting edges 16 located on the side. The six side cutting edges 16 are evenly spaced apart in the circumferential direction. The shank 14 also includes six bottom cutting edges 18 corresponding to the six side cutting edges 16 one by one, and each bottom cutting edge 18 is located at the intersection of the corresponding side cutting edge 16 and the bottom surface. The six side cutting edges 16 located on the side are spiral cutting edges. During machining, the first reamer 10 uses the six bottom cutting edges 18 to perform cutting so as to remove a thin layer of surface material of the existing inner hole.

[0038] Figure 2 A conventional reamer 20 is shown, and the reamer 20 includes a second clamping portion 22 and a second tool bar 24. The second clamping portion 22 is configured to be clamped by a machining machine so as to use the second reamer 20 to perform reaming. The second tool bar 24 includes two side cutting edges 26 located on the side. The two side cutting edges 26 are evenly spaced apart in the circumferential direction. The second tool bar 24 also includes two bottom cutting edges 28 corresponding to the two side cutting edges 26, and each bottom cutting edge 28 is located at the intersection of the corresponding side cutting edge 26 and the bottom surface. The two side cutting edges 26 located on the side are spiral cutting edges. During processing, the second reamer 20 uses the two bottom cutting edges 28 to cut so as to remove the surface thin layer of material of the existing inner hole.

[0039] Figure 3 A conventional reamer 30 is shown, and the reamer 30 includes a third clamping portion 32 and a third shank 34. The third clamping portion 32 is configured to be clamped by a machining machine so as to use the third reamer 30 to perform reaming. The third shank 34 includes four side cutting edges 36 located on the side. The four side cutting edges 36 are evenly spaced apart in the circumferential direction. The third shank 34 also includes four bottom cutting edges 38 corresponding to the four side cutting edges 36, and each bottom cutting edge 38 is located at the intersection of the corresponding side cutting edge 36 and the bottom surface. The four side cutting edges 36 located on the side are straight cutting edges. During machining, the third reamer 30 uses the four bottom cutting edges 38 to perform cutting so as to remove a thin layer of surface material of the existing inner hole.

[0040] In addition to the above three conventional reamers, conventional reamers may also include other numbers of side cutting edges and bottom cutting edges, such as one, three, five, seven, eight, etc., and in the case of various numbers of cutting edges, the side cutting edges may be straight cutting edges or spiral cutting edges. Such designed reamers all have the problem of excessive wear, which results in low processing efficiency, poor overall positioning of the inner hole of the part, and high cost of reamer replacement. In order to solve the above problems, the utility model provides a reamer and a customization method for processing the inner hole in satellite carbon fiber parts.

[0041] like Figure 4 As shown, in one embodiment of the present application, a reamer for processing inner holes in satellite carbon fiber parts is provided, including: a clamping portion 102, a tool rod 104, a first side cutting edge 107, a second side cutting edge 110 and a notch 112.

[0042] The shank 104 is connected to the clamping portion 102, and includes a side cutting portion 106 and a bottom surface 108, and a chamfer 109 is provided between the side cutting portion 106 and the bottom surface 108. A first side cutting edge 107 is provided on the side cutting portion 106 at a position close to the bottom surface 108, and the chamfer 109 connects the first end of the first side cutting edge 107 and the outer edge of the bottom surface 108, and the top surface of the first side cutting edge 107 is a curved surface. At least one second side cutting edge 110 is provided on the side cutting portion 106 at a position away from the bottom surface 108, and the top surface of the second side cutting edge 110 has a convex ridge 111, and the convex ridge 111 extends in the same direction as the second side cutting edge 110. A notch 112 is provided on the side cutting portion 106 and is located between the first side cutting edge 107 and the second side cutting edge 110.

[0043] The clamping portion 102 is used to connect and fix to a processing machine tool, and then the processing machine tool drives the clamping portion 102 and the tool rod 104 to move and perform milling operations. When processing the inner hole, the bottom surface 108 and the first side cutting edge 107 enter the inner hole first. Due to the setting of the chamfer 109, the bottom surface 108 and the first side cutting edge 107 are subject to less resistance from the inner hole, so that they can smoothly enter the inner hole without damaging the inner hole. When the tool rod 104 is further extended into the inner hole, the notch 112 and the second side cutting edge 110 enter the inner hole in turn, and the notch 112 will not contact the side wall of the inner hole. The second side cutting edge 110 can process the side wall of the inner hole when entering and advancing. It should be noted that, since the top surface of the first side cutting edge 107 is an arc surface, the cutting ability of the first side cutting edge 107 is reduced, the resistance of the inner hole to the first side cutting edge 107 is reduced, and the wear degree of the first side cutting edge 107 is reduced. During the processing, the first side cutting edge 107 is mainly used for support, positioning and guidance. Since the top surface of the second side cutting edge 110 has a convex ridge 111, the cutting ability of the second side cutting edge 110 is improved, and the edge of the convex ridge 111 is where the notch is located, so the edge of the convex ridge 111 can also cut the surface of the inner hole during the advancement process, so that the inner wall of the inner hole can be cut by the convex ridge 111, thereby removing the surface thin layer of material of the inner hole.

[0044] Therefore, the reamer provided by the utility model can complete the cutting work of the inner hole through the cooperation of the first side cutting edge 107, the notch 112 and the second side cutting edge 110, which can not only reduce the wear of the reamer, but also ensure the cutting efficiency, and at the same time improve the accuracy of the overall position of the inner hole of the part.

[0045] Specifically, the side cutting part 106 of the reamer is reground in sections and then reamed, replacing the overall reaming reaming processing method, solving the problem of severe wear of the overall reaming and high tool cost. Segmented processing can reduce the cutting contact surface of the reamer, avoid reamer wear, and increase tool life. From a reamer that can only process one inner hole to a reamer that can process 100 or even more inner holes after improvement. In addition, it also solves the processing error caused by frequent reamer replacement and improves the overall position accuracy of the inner hole of the part.

[0046] like Figure 4 As shown, in this embodiment, a first surface 113 is provided between the notch 112 and the first side cutting edge 107, and a second surface 114 is provided between the notch 112 and the second side cutting edge 110, and both the first surface 113 and the second surface 114 are parallel to the radial direction of the tool bar 104. In this way, the edge of the first surface 113 connected to the second side cutting edge 110 can cut the side wall of the inner hole when the tool bar 104 is pushed into the inner hole. Due to the provision of the ridge 111, the edge of the first surface 113 can cut more effectively, so as to remove the existing surface thin layer of material of the inner hole. The edge of the second surface 114 connected to the first side cutting edge 107 can also cut the inner wall of the inner hole. Setting the first surface 113 and the second surface 114 to be parallel to the radial direction of the tool rod 104 can prevent the edges of the first surface 113 and the second surface 114 from excessively contacting the wall of the inner hole, thereby ensuring that the ridge 111 of the second side cutting edge 110 is mainly used for cutting, so that the cutting position and the wear position of the side cutting portion 106 are controlled, thereby making the wear degree of the tool rod 104 controllable.

[0047] Since the main cutting method of the chipper is cutting when the tool rod 104 is advancing, when the tool is retracted, although the edge of the second surface 114 cuts the inner wall of the inner hole, compared with the prior art, although such a setting will have a certain resistance at the edge position of the second surface 114, causing a certain wear, the top surface resistance of the first side cutting edge 107 is very small, and the entire first side cutting edge 107 will not be worn, thereby improving the overall wear resistance of the first side cutting edge 107 and reducing the number of frequent replacement of the chipper.

[0048] The notch 112 has a certain depth, and the bottom surface is a plane or an arc surface, which can separate the first side cutting edge 107 and the second side cutting edge 110 by a certain distance, and can also separate two adjacent second side cutting edges 110 by a certain distance, thereby realizing segmented cutting.

[0049] like Figure 4 As shown, in this embodiment, at least two side cutting portions 106 are arranged at intervals along the circumferential direction of the knife rod 104, and the side cutting portions 106 extend along the axial direction of the knife rod 104. Figure 4 As shown in the figure, the two side cutting portions 106 are arranged at intervals, and there is a groove between the two side cutting portions 106 in the same extending direction as the side cutting portion 106. In this way, two ridges 111 can cut the inner wall of the inner hole, thereby improving the cutting ability of the tool rod 104.

[0050] like Figure 5 As shown, in a specific implementation of this embodiment, four side cutting portions 106 are arranged at intervals along the circumferential direction of the knife rod 104, and the side cutting portions 106 extend along the axial direction of the knife rod 104, for example Figure 5 As shown in the figure, four side cutting portions 106 are arranged at intervals, and there is a groove between two adjacent side cutting portions 106 in the same extending direction as the side cutting portion 106. In this arrangement, four ridges 111 can cut the inner wall of the inner hole, thereby improving the cutting ability of the tool rod 104.

[0051] like Figure 6 As shown, in a specific implementation of this embodiment, six side cutting portions 106 are arranged at intervals along the circumferential direction of the knife rod 104, and the side cutting portions 106 extend along the axial direction of the knife rod 104, for example Figure 6 As shown in the figure, six side cutting portions 106 are arranged at intervals, and there is a groove between two adjacent side cutting portions 106 in the same extending direction as the side cutting portion 106. In this way, six ridges 111 can cut the inner wall of the inner hole, thereby improving the cutting ability of the tool rod 104.

[0052] In addition, the number of the side cutting portions 106 can also be three, five, seven, eight or more. The more the number of the side cutting portions 106 is, the stronger the cutting ability of the reamer is, and the number can be set according to actual conditions. For a reamer having at least two side cutting portions 106, the edge portions of the first side cutting edge 107 and the second side cutting edge 110 connected to the slot can also cut the inner wall of the inner hole, thereby improving the overall cutting ability of the reamer.

[0053] like Figure 6As shown, in this embodiment, the side cutting portion 106 is a straight cutting edge. Such a setting can adapt to the inner hole cutting scene with high requirements for processing accuracy, can reduce vibration and deviation during the cutting process, ensure processing quality, and improve processing efficiency.

[0054] like Figure 4 and Figure 5 As shown, in this embodiment, the side cutting portion 106 is a spiral cutting edge. Such a setting can adapt to the inner hole of complex shape, especially when cutting along a curve or irregular surface is required, and at the same time can reduce the accumulation of chips and reduce the cutting resistance.

[0055] The shape of the side cutting portion 106 can be specifically set according to actual conditions. The focus of this embodiment is to realize the structure of the first side cutting edge 107, the notch 112 and the second side cutting edge 110 forming a straight cutting edge or a spiral cutting edge. The difference is that the extension directions of the first side cutting edge 107, the notch 112 and the second side cutting edge 110 are different, but they can still play a role in reducing the resistance encountered by the first side cutting edge 107, thereby reducing the degree of wear on the first side cutting edge 107.

[0056] In this embodiment, at least two second side cutting edges 110 are arranged on the side cutting portion 106 at a position away from the bottom surface 108, and the notch 112 is arranged between two adjacent second side cutting edges 110. For example, two second side cutting edges 110 may be arranged on the side cutting portion 106, such as Figure 4 As shown, from the bottom surface 108 to the clamping portion 102, there are the first side cutting edge 107, the notch 112, the second side cutting edge 110, the notch 112, and the second side cutting edge 110. This arrangement increases the number of second side cutting edges 110. Especially when used for processing inner holes with a relatively large aspect ratio, providing two or more second side cutting edges 110 can further reduce wear.

[0057] In addition, three, four or more second side cutting edges 110 may be provided, depending on the actual situation. The notch 112 is provided between the first side cutting edge 107 and the second side cutting edge 110 , and between two adjacent second side cutting edges 110 .

[0058] like Figure 7 As shown, the utility model provides a customization method for a reamer used for processing inner holes in satellite carbon fiber parts, which is used to design and manufacture the reamer introduced above, and the customization method includes:

[0059] Step S701, positioning the clamping part and the tool bar of the reamer. First, the workpiece is machined to form the clamping part and the tool bar.

[0060] Step S702, machining the tool bar to form a side cutting portion, a bottom surface, and a chamfer between the side cutting portion and the bottom surface. The side cutting portion, the bottom surface, and the chamfer are machined on the tool bar in sequence. The number of side cutting portions can be determined according to actual conditions, and the number of chamfers corresponds to the number of side cutting portions.

[0061] Step S703, a first side cutting edge, a notch, and a second side cutting edge are sequentially processed along the extension direction of the side cutting portion, wherein the first side cutting edge is close to the bottom surface, and the second side cutting edge is away from the bottom surface. The number of the second side cutting edges is determined according to the actual situation, and the number of the notches is determined according to the number of the second side cutting edges, which can be specifically set with reference to the positional relationship between the first side cutting edge, the second side cutting edge and the notch in the above text.

[0062] Step S704: machining a convex ridge on the top surface of the second side cutting edge. Both sides of the convex ridge are inclined surfaces, thereby forming the convex ridge.

[0063] The specific structure and function of the reamer customized in this embodiment are exactly the same as those of the reamer described above, and will not be described in detail here.

[0064] In this embodiment, the customization method further includes machining at least two side cutting portions along the circumferential direction of the tool rod.

[0065] In this embodiment, the customization method further includes machining at least two second side cutting edges at a position of the side cutting portion away from the bottom surface, and machining a notch between two adjacent second side cutting edges.

[0066] In this embodiment, the undercut portion is a straight cutting edge.

[0067] In this embodiment, the undercut portion is a spiral cutting edge.

[0068] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A reamer for processing inner holes in satellite carbon fiber parts, characterized in that: include: A clamping portion (102); A knife bar (104) is connected to the clamping portion (102), and comprises a side cutting portion (106) and a bottom surface (108), wherein a chamfer (109) is provided between the side cutting portion (106) and the bottom surface (108); A first side cutting edge (107) is arranged on the side cutting portion (106) at a position close to the bottom surface (108), the chamfer (109) connects a first end of the first side cutting edge (107) and an outer edge of the bottom surface (108), and the top surface of the first side cutting edge (107) is a curved surface; a second side cutting edge (110), at least one of the second side cutting edges (110) being arranged on the side cutting portion (106) at a position away from the bottom surface (108), the top surface of the second side cutting edge (110) having a convex ridge (111), the convex ridge (111) and the second side cutting edge (110) extending in the same direction; A notch (112) is provided on the side cutting portion (106) and is located between the first side cutting edge (107) and the second side cutting edge (110).

2. The reamer for processing inner holes in satellite carbon fiber parts according to claim 1, characterized in that: A first surface (113) is arranged between the notch (112) and the first side cutting edge (107), and a second surface (114) is arranged between the notch (112) and the second side cutting edge (110), and both the first surface (113) and the second surface (114) are parallel to the radial direction of the knife rod (104).

3. The reamer for processing inner holes in satellite carbon fiber parts according to claim 1, characterized in that: At least two of the second side cutting edges (110) are arranged on the side cutting portion (106) at positions away from the bottom surface (108), and the notch (112) is arranged between two adjacent second side cutting edges (110).

4. The reamer for processing inner holes in satellite carbon fiber parts according to claim 1, characterized in that: At least two of the side cutting portions (106) are arranged at intervals along the circumferential direction of the knife rod (104), and the side cutting portions (106) extend along the axial direction of the knife rod (104).

5. A reamer for machining inner holes in satellite carbon fiber parts according to any one of claims 1 to 4, characterized in that: The side cutting portion (106) is a straight cutting edge.

6. A reamer for machining inner holes in satellite carbon fiber parts according to any one of claims 1 to 4, characterized in that: The side cutting portion (106) is a spiral cutting edge.

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