Reamer

Abstract

The utility model provides a reamer, and belongs to the field of machining. The reamer comprises a shaft body and a plurality of blades, the cutting edges extend in the axial direction of the shaft body and are arranged at intervals in the circumferential direction of the shaft body, the tangent plane, perpendicular to the length direction of the cutting edges, of each cutting edge comprises a first curve and a second curve, the first curves intersect with the second curves, the included angle between the first curves and the second curves is an acute angle, and each cutting edge comprises a first guide section and a rough cutting edge section which are sequentially connected. A second guide section, a fine cutting edge section, a calibration section and a handle section. The reamer can be guided to be centered, so that a positioning tool does not need to be additionally matched, and reaming holes in an unconventional machining face are machined with high efficiency and low cost.

Description

Technical Field

[0001] The present invention relates to the field of mechanical processing, and in particular to a reamer. Background Art

[0002] A reamer is a common machining tool used for reaming holes.

[0003] In related technologies, when a workpiece is machined with a reamer, the surface where the hole is to be machined is considered the machining surface. If the machining surface is a conventional flat surface, normal machining with the reamer is sufficient. However, if the machining surface is an unconventional curved surface, additional positioning tooling is required to position the reamer to ensure that the machining accuracy meets the requirements.

[0004] However, the production of positioning tooling will increase processing costs, and the disassembly and assembly of the positioning tooling will take time, resulting in reduced processing efficiency. Utility Model Content

[0005] The disclosed embodiment provides a reamer that can process holes on unconventional machining surfaces with high efficiency and low cost. The technical solution is as follows:

[0006] In one aspect, an embodiment of the present disclosure provides a reamer, comprising: a shaft and a plurality of blades;

[0007] Each of the blades extends along the axial direction of the shaft body, and each of the blades is arranged at intervals along the circumference of the shaft body. The cross-section of the blade perpendicular to its own length direction includes a first curve and a second curve. The first curve and the second curve intersect, and the angle between the first curve and the second curve is an acute angle. The blade includes a first guide section, a rough cutting edge section, a second guide section, a fine cutting edge section, a calibration section and a handle section connected in sequence.

[0008] In one implementation of the present disclosure, the first end of the first curve is connected to the shaft, the second end of the first curve is connected to the second curve, and the first curve bends toward the corresponding second curve from the first end to the second end of the first curve.

[0009] In an implementation of the present disclosure, the first curve is curved in an exponential function line from the first end to the second end of the first curve.

[0010] In one implementation of the present disclosure, the first end of the second curve is connected to the shaft, the second end of the second curve is connected to the first curve, and the second curve bends toward the corresponding first curve from the first end to the second end of the second curve.

[0011] In an implementation of the present disclosure, the second curve is curved in a logarithmic function shape from the first end to the second end of the second curve.

[0012] In one implementation of the present disclosure, the outer contour of the first guide segment is cylindrical, the outer contour of the rough cutting edge segment is truncated cone-shaped, the outer contour of the second guide segment is cylindrical, the outer contour of the fine cutting edge segment is truncated cone-shaped, and the outer contour of the calibration segment is truncated cone-shaped;

[0013] The outer diameter of the first guide segment is consistent with the outer diameter of the small end of the rough cutting edge segment, the outer diameter of the large end of the rough cutting edge segment, the outer diameter of the second guide segment, and the outer diameter of the small end of the fine cutting edge segment are consistent, and the outer diameter of the large end of the fine cutting edge segment is consistent with the outer diameter of the large end of the calibration segment.

[0014] In one implementation of the present disclosure, the axial length of the first guide segment is greater than the axial length of the rough cutting edge segment;

[0015] The axial length of the second guide segment is greater than the axial length of the finishing cutting edge segment.

[0016] In an implementation of the present disclosure, the taper angle of the outer contour of the rough cutting edge segment is 1 to 3°.

[0017] In one implementation of the present disclosure, the taper of the calibration section is 0.02 mm / 100 mm to 0.05 mm / 100 mm.

[0018] In an implementation of the present disclosure, the blade is any one of a spiral blade and a straight blade.

[0019] The beneficial effects of the technical solutions provided by the embodiments of the present disclosure include at least:

[0020] The reamer provided in the disclosed embodiments includes a shaft and a blade. The shaft is the main body of the reamer and provides support for the blade, while the blade is used to cut the hole to be reamed. A cross-section of the blade perpendicular to its length includes a first curve and a second curve. The first and second curves intersect, and the angle between the first and second curves is acute, thereby ensuring the sharpness of the blade, thereby improving both cutting efficiency and cutting accuracy.

[0021] The blade includes a first guide segment, a rough cutting edge segment, a second guide segment, a finishing cutting edge segment, a calibration segment, and a shank segment, all connected in sequence. The first guide segment guides the reamer's centering, the rough cutting edge segment removes a portion of the cutting margin, the second guide segment further corrects centering errors, the finishing cutting edge segment removes the remaining cutting margin, the calibration segment calibrates the straightness of the entire reamed hole, and the shank is clamped by the lathe. Through the step-by-step guidance and calibration of the first, second, and calibration segments, precise positioning can be achieved when reaming holes on unconventional machining surfaces, even without the use of a positioning fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 is a structural schematic diagram of a reamer provided in an embodiment of the present disclosure;

[0024] Figure 2 The embodiment of the present disclosure provides Figure 1 AA direction cross-sectional view;

[0025] Figure 3 It is a partial enlarged view of the reamer provided in the embodiment of the present disclosure.

[0026] The symbols in the figure mean the following:

[0027] 10. Axis;

[0028] 20. Blade;

[0029] 210, first curve; 220, second curve; 230, first guide segment; 240, rough cutting edge segment; 250, second guide segment; 260, fine cutting edge segment; 270, calibration segment; 280, shank segment.

[0030] The above drawings illustrate specific embodiments of the present disclosure, which will be described in more detail below. These drawings and textual descriptions are not intended to limit the scope of the present disclosure in any way, but rather to illustrate the concepts of the present disclosure to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0032] The embodiment of the present disclosure provides a reamer, Figure 1 is the structural diagram of the reamer. Figure 2 for Figure 1 AA direction cross-sectional view, combined with Figure 1 and Figure 2 In this embodiment, the shaft body 10 and multiple blades 20, each blade 20 extends along the axial direction of the shaft body 10, and each blade 20 is arranged at intervals along the circumference of the shaft body 10, and the cross-section of the blade 20 perpendicular to its own length direction includes a first curve 210 and a second curve 220, the first curve 210 and the second curve 220 intersect, and the angle between the first curve 210 and the second curve 220 is an acute angle, and the blade 20 includes a first guide segment 230, a rough cutting edge segment 240, a second guide segment 250, a fine cutting edge segment 260, a calibration segment 270 and a handle segment 280 connected in sequence.

[0033] The reamer provided in the disclosed embodiment includes a shaft 10 and a blade 20. The shaft 10 is the main body of the reamer and is used to provide a support base for the blade 20. The blade 20 is used to cut the hole to be reamed. A cross-section of the blade 20 perpendicular to its length includes a first curve 210 and a second curve 220. The first curve 210 and the second curve 220 intersect, and the angle between the first curve 210 and the second curve 220 is acute, thereby ensuring the sharpness of the blade 20, improving cutting efficiency and cutting accuracy.

[0034] In addition, the blade 20 includes a first guide segment 230, a rough cutting edge segment 240, a second guide segment 250, a fine cutting edge segment 260, a calibration segment 270, and a shank segment 280, which are connected in sequence. The first guide segment 230 is used to guide the reamer's centering, the rough cutting edge segment 240 is used to remove a portion of the cutting edge allowance, the second guide segment 250 is used to further correct the centering error, the fine cutting edge segment 260 is used to remove the remaining cutting edge allowance, the calibration segment 270 is used to calibrate the straightness of the entire reamed hole, and the shank segment 280 is used to be clamped by a lathe. Through the step-by-step guidance and calibration of the first guide segment 230, the second guide segment 250, and the calibration segment 270, precise positioning can be achieved when reaming holes on unconventional machining surfaces, even without the use of positioning fixtures.

[0035] In this embodiment, the blade 20 is either a spiral blade or a straight blade.

[0036] The type of blade 20 can be selected according to actual needs, such as a left-handed spiral blade, a right-handed spiral blade, a straight blade, etc., and the present disclosure does not limit this.

[0037] Continue to see Figure 2In this embodiment, the first end of the first curve 210 is connected to the shaft 10, and the second end of the first curve 210 is connected to the second curve 220. Along the first end to the second end of the first curve 210, the first curve 210 bends toward the corresponding second curve 220.

[0038] In the above implementation, along the first end to the second end of the first curve 210, the first curve 210 bends toward the corresponding second curve 220, so that the second end of the first curve 210 extends in the direction toward the second curve 220, which can effectively reduce the angle between the first curve 210 and the second curve 220, thereby improving the sharpness of the angle between the first curve 210 and the second curve 220.

[0039] Exemplarily, from the first end to the second end of the first curve 210 , the first curve 210 is curved in an exponential function line.

[0040] In the above implementation, Figure 2 The cross-shaped dotted line shown in the figure is regarded as the horizontal and vertical coordinate axes, and the first curve 210 is curved in an exponential function line, that is, the closer to the second curve 220, the more the extension direction of the second end of the first curve 210 is along the radial extension of the shaft body 10, so that the blade 20 has a tendency to extend away from the shaft body 10, so that the angle between the first curve 210 and the second curve is as far away from the shaft body 10 as possible, which is conducive to improving the sharpness of the angle between the first curve 210 and the second curve 220.

[0041] Continue to see Figure 2 In this embodiment, the first end of the second curve 220 is connected to the shaft 10, and the second end of the second curve 220 is connected to the first curve 210. Along the first end to the second end of the second curve 220, the second curve 220 bends toward the corresponding first curve 210.

[0042] In the above implementation, along the first end to the second end of the second curve 220, the second curve 220 bends toward the corresponding first curve 210, so that the second end of the second curve 220 extends in the direction toward the first curve 210, which can effectively reduce the angle between the first curve 210 and the second curve 220, thereby improving the sharpness of the angle between the first curve 210 and the second curve 220.

[0043] Exemplarily, from the first end to the second end of the second curve 220 , the second curve 220 is curved in a logarithmic function line.

[0044] In the above implementation, Figure 2The cross-shaped dotted line shown in the figure is regarded as the horizontal and vertical coordinate axes, and the second curve 220 is curved in a logarithmic function line, that is, the closer to the first curve 210, the more the extension direction of the second end of the second curve 220 extends along the tangent direction of the shaft body 10, so that the blade 20 has a tendency to extend along the circumference of the shaft body 10, so that the angle between the first curve 210 and the second curve is as close as possible to the cutting direction, which is beneficial to improving the sharpness of the angle between the first curve 210 and the second curve 220.

[0045] Figure 3 This is a partial enlarged view of the reamer. Figure 3 Perspective and Figure 1 consistent perspective, combined Figure 3 In this embodiment, the outer contour of the first guide segment 230 is cylindrical, the outer contour of the rough cutting edge segment 240 is truncated cone, the outer contour of the second guide segment 250 is cylindrical, the outer contour of the fine cutting edge segment 260 is truncated cone, and the outer contour of the calibration segment 270 is truncated cone.

[0046] In the above implementation, the roughing and finishing cutting segments 240 and 260 are truncated cones, with their smaller ends facing the reamer's feed direction. The calibration segment 270 is inverted truncated cones, with its smaller ends facing away from the reamer's feed direction. This allows the roughing and finishing cutting segments 240 and 260 to effectively cut the reamed hole, while the calibration segment 270 can be used to calibrate the hole using its larger end and reduce friction between the calibration segment 270 and the inner wall of the reamed hole using its smaller end.

[0047] In this embodiment, the outer diameter of the first guide section 230 is consistent with the outer diameter of the small end of the rough cutting edge section 240, the outer diameter of the large end of the rough cutting edge section 240, the outer diameter of the second guide section 250, and the outer diameter of the small end of the fine cutting edge section 260 are consistent, and the outer diameter of the large end of the fine cutting edge section 260 is consistent with the outer diameter of the large end of the calibration section 270.

[0048] In the above implementation, a smooth transition can be achieved between the first guide segment 230, the rough cutting edge segment 240, the second guide segment 250, the fine cutting edge segment 260, and the calibration segment 270, thereby ensuring the stability of the reamer during feeding.

[0049] Exemplarily, the axial length of the first guide segment 230 is greater than the axial length of the rough cutting edge segment 240 , and the axial length of the second guide segment 250 is greater than the axial length of the fine cutting edge segment 260 .

[0050] In the above implementation, since the first guide segment 230 contacts the reaming hole before the rough cutting edge segment 240, the first guide segment 230 is designed to be longer, ensuring that the first guide segment 230 stably guides the rough cutting edge segment 240 during cutting. Accordingly, since the second guide segment 250 contacts the reaming hole before the finishing cutting edge segment 260, the second guide segment 250 is designed to be longer, ensuring that the second guide segment 250 stably guides the finishing cutting edge segment 260 during cutting.

[0051] Exemplarily, the taper angle a of the outer contour of the rough cutting edge segment 240 is 1 to 3°.

[0052] Illustratively, the taper of the calibration section 270 is 0.02 mm / 100 mm to 0.05 mm / 100 mm.

[0053] In the above implementation, the taper of the calibration section 270 refers to the ratio of the diameter difference between the small end and the large end of the calibration section 270 to the length of the calibration section 270 .

[0054] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the present disclosure belongs. The words “first”, “second”, “third” and similar terms used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as “a” or “an” do not indicate a quantity limitation, but rather indicate the presence of at least one. Words such as “include” or “comprise” mean that the elements or objects appearing before “include” or “comprises” include the elements or objects listed after “include” or “comprises” and their equivalents, and do not exclude other elements or objects. Words such as “connect” or “connected” are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Up”, “down”, “left”, “right” and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0055] The above description is merely an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A reamer, characterized in that: include: A shaft (10) and a plurality of blades (20); Each of the blades (20) extends along the axial direction of the shaft body (10), and each of the blades (20) is arranged at intervals along the circumference of the shaft body (10); a section of the blade (20) perpendicular to its own length direction includes a first curve (210) and a second curve (220); the first curve (210) and the second curve (220) intersect, and the angle between the first curve (210) and the second curve (220) is an acute angle; the blade (20) includes a first guide segment (230), a rough cutting edge segment (240), a second guide segment (250), a fine cutting edge segment (260), a calibration segment (270), and a shank segment (280) connected in sequence.

2. The reamer according to claim 1, characterized in that The first end of the first curve (210) is connected to the shaft (10), and the second end of the first curve (210) is connected to the second curve (220). From the first end to the second end of the first curve (210), the first curve (210) bends toward the corresponding second curve (220).

3. The reamer according to claim 2, characterized in that From the first end to the second end of the first curve (210), the first curve (210) is curved in an exponential function line.

4. The reamer according to claim 1, characterized in that The first end of the second curve (220) is connected to the shaft (10), and the second end of the second curve (220) is connected to the first curve (210). Along the first end to the second end of the second curve (220), the second curve (220) bends toward the corresponding first curve (210).

5. The reamer according to claim 4, characterized in that From the first end to the second end of the second curve (220), the second curve (220) is curved in a logarithmic function line.

6. The reamer according to claim 1, characterized in that The outer contour of the first guide segment (230) is cylindrical, the outer contour of the rough cutting edge segment (240) is truncated cone, the outer contour of the second guide segment (250) is cylindrical, the outer contour of the fine cutting edge segment (260) is truncated cone, and the outer contour of the calibration segment (270) is truncated cone; The outer diameter of the first guide segment (230) is consistent with the outer diameter of the small end of the rough cutting edge segment (240); the outer diameter of the large end of the rough cutting edge segment (240), the outer diameter of the second guide segment (250), and the outer diameter of the small end of the fine cutting edge segment (260) are consistent; and the outer diameter of the large end of the fine cutting edge segment (260) is consistent with the outer diameter of the large end of the calibration segment (270).

7. The reamer according to claim 6, characterized in that The axial length of the first guide section (230) is greater than the axial length of the rough cutting edge section (240); The axial length of the second guide segment (250) is greater than the axial length of the finishing cutting edge segment (260).

8. The reamer according to claim 6, characterized in that The taper angle of the outer contour of the rough cutting edge segment (240) is 1-3 degrees.

9. The reamer according to claim 6, characterized in that The taper of the calibration section (270) is 0.02mm / 100mm to 0.05mm / 100mm.

10. The reamer according to claim 1, wherein The blade (20) is any one of a spiral blade and a straight blade.

Images