Reamer

Abstract

The invention provides a reamer, and relates to the field of reamers. The reamer comprises a reamer handle, a reamer body is connected to one side of the reamer handle, six side blades are arranged outside the reamer body, a contact part is arranged at the end, away from the reamer handle, of the reamer body, six blades are arranged on the outer side of the contact part, and the blades are all arranged on one sides of the side blades. The three water outlet holes are formed in the reamer body and distributed in the three equal-distance sections, heat dissipation and chip removal of the reamer are facilitated, the six cutting edges are arranged in a normal cutting mode, the cutting effectiveness is improved, meanwhile, the 10-degree cutting edges are arranged, accelerated abrasion caused by too large stress when the cutting edges actually cut metal is avoided, and the service life of the reamer is prolonged. The arrangement of the six side blades is combined with the arrangement of the back taper of 0.02-0.03 mm every 100 mm, so that reaming is more effective, accelerated abrasion of the reamer caused by reaming is avoided, the reamer has more machining parts, the reamer does not need to be replaced frequently, the service life is longer, the reamer is more stable, and the machining precision is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of reamers, and specifically to a reamer. Background Art

[0002] When finishing the valve guide bush holes of a motorcycle engine cylinder head, a reamer is required. The reamer belongs to the parts for reaming and finishing, and is a consumable. When the existing reamer is actually used, among the six cutting edges, two of the spaced cutting edges are extrusion stabilizing edges, and the front cutting edge is usually a 45-degree chamfer cutting edge. When this reamer processes parts, the loss is large and the number of processed parts is small. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides a reamer, which solves the problem of large loss of the existing reamer.

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions: A reamer includes a tool shank. One side of the tool shank is connected with a tool body. Six side edges are arranged on the outer side of the tool body. One end of the tool body away from the tool shank is provided with a contact part. Six cutting edges are arranged on the outer side of the contact part. The cutting edges are all arranged on one side of the side edges.

[0005] Preferably, the center lines of the contact part and the tool body are perpendicularly arranged.

[0006] Preferably, the included angle between the cutting edge and the center line of the tool body is 10 degrees to 12 degrees, and the vertical length between the cutting edge and the contact part is 1 - 1.2 millimeters.

[0007] Preferably, the taper size of the side edge per 100 millimeters is between 0.02 - 0.03 millimeters.

[0008] Preferably, three water outlet holes are arranged on the tool body at unequal distances.

[0009] Preferably, the included angles between the six side edges are 63 degrees, 58 degrees, 59 degrees, 63 degrees, 58 degrees, and 59 degrees in sequence.

[0010] Working Principle: Three water outlet holes are arranged on the tool body in three equally spaced cross-sections, which is convenient for the reamer to dissipate heat and discharge chips. All six cutting edges are set for normal cutting, which improves the effectiveness of cutting. At the same time, combined with the 10-degree cutting edge setting, when the cutting edge actually cuts metal, it will not cause accelerated wear due to excessive force. The setting of the six side edges combined with the setting of the taper of 0.02 - 0.03 millimeters per 100 millimeters makes the reaming more effective, avoids the accelerated wear of the reamer caused by reaming, enables the reamer of the present technical solution to increase the number of processed parts per piece during actual processing, does not require frequent tool replacement, has a longer service life and is more stable, and has high machining accuracy.

[0011] The present invention provides a reamer. It has the following beneficial effects: In the present invention, three water outlet holes are arranged on the tool body and distributed in three equally spaced cross-sections, which facilitates heat dissipation and chip removal of the reamer. All six cutting edges are set for normal cutting, improving the effectiveness of cutting. At the same time, combined with the 10-degree cutting edge setting, when the cutting edge actually cuts metal, it will not cause accelerated wear due to excessive force. The setting of six side edges combined with the setting of a taper of 0.02 - 0.03 mm per 100 mm makes the reaming more effective, avoiding accelerated wear of the reamer caused by reaming. The reamer can process more parts, the tool does not need to be replaced frequently, has a longer service life and is more stable, and the machining accuracy is higher. Description of the Drawings

[0012] Figure 1 is the structural diagram of the present invention; Figure 2 is the side view of the tool body of the present invention; Figure 3 is the explanatory diagram of the included angle between the side edges of the present invention.

[0013] Among them, 1, tool shank; 2, tool body; 3, cutting edge; 4, contact part; 5, side edge. Detailed Embodiment

[0014] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0015] Embodiment: As Figures 1 - 3 shown, the embodiment of the present invention provides a reamer, including a tool shank 1. One side of the tool shank 1 is connected to a tool body 2. Six side edges 5 are arranged on the outside of the tool body 2. The side edges 5 can perform reaming and finishing to make the hole smooth. One end of the tool body 2 away from the tool shank 1 is provided with a contact part 4. The contact part 4 directly contacts the component. Six cutting edges 3 are arranged on the outside of the contact part 4. The cutting edges 3 are all arranged on one side of the side edge 5. The cutting edges 3 directly perform drilling and reaming and finishing the hole.

[0016] The center lines of the contact part 4 and the tool body 2 are vertically arranged, so that the cutting edges 3 can directly finish the hole and effectively ream the hole.

[0017] The included angle between the cutting edge 3 and the center line of the tool body 2 is 10 degrees to 12 degrees. The vertical length between the cutting edge 3 and the contact part 4 is 1 - 1.2 mm. The setting of the small included angle enables the cutting edge 3 to combine with the six cutting edges 3 during cutting, realizing cutting and tool protection and extending the service life of the tool.

[0018] The taper size of the side edge 5 is between 0.02 - 0.03 mm per 100 mm. Considering wear, it can increase the tool life and the number of parts machined by a single tool.

[0019] There are three water outlet holes with unequal distances on the tool body 2, which is convenient for tool cooling and makes it more suitable for cutting according to actual chips and heat dissipation.

[0020] The angles between the six side edges 5 are 63 degrees, 58 degrees, 59 degrees, 63 degrees, 58 degrees, and 59 degrees in sequence, enabling both cutting and reaming to be carried out effectively and prolonging the tool life. Combined with existing tools, the present application gives the following comparison of the actual number of parts machined by the tool:

[0021] Based on the above table, for ordinary tools, the tool life - each tool can machine approximately 500 - 700 workpieces each time, with an average of 2 - 4 grinds per tool, and the purchase price of each tool is approximately 1100 yuan; processing cost: 1100 / (600 * 3) = 0.61 yuan per piece (self-grinding, without considering the grinding cost). For this tool, the tool life - each tool can machine approximately 1000 - 1200 workpieces each time, with an average of 2 - 4 grinds per tool, and the purchase price of each tool is approximately 1200 yuan; processing cost: 1200 / (1100 * 3) = 0.36 yuan per piece (self-grinding, without considering the grinding cost). The main advantages of this tool are: the average processing cost per piece is significantly reduced, with an average reduction of: (0.61 - 0.36) / 0.61 = 41%, that is, the cost performance is significantly improved; due to the longer tool life, the tool grinding and replacement frequency are reduced, improving production efficiency; during the tool manufacturing process, strict process control is implemented, making the tool quality more stable and the accuracy higher.

[0022] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reamer, comprising a handle (1), one side of the handle (1) being connected to a blade (2), characterized in that: Six side blades (5) are arranged outside the blade body (2); a contact portion (4) is arranged at one end of the blade body (2) away from the handle (1); six blades (3) are arranged outside the contact portion (4); and the blades (3) are all arranged on one side of the side blade (5).

2. A reamer according to claim 1, characterized in that: The center lines of the contact portion (4) and the blade body (2) are arranged vertically.

3. A reamer according to claim 1, characterized in that: The angle between the blade (3) and the center line of the blade body (2) is 10 to 12 degrees, and the vertical length between the blade (3) and the contact portion (4) is 1 to 1.2 millimeters.

4. A reamer according to claim 1, characterized in that: The inverted taper size of the side edge (5) is between 0.02 and 0.03 millimeters per 100 millimeters.

5. A reamer according to claim 1, characterized in that: The blade (2) is provided with three water outlet holes at unequal intervals.

6. A reamer according to claim 1, characterized in that: The angles between the six side cutting edges (5) are 63 degrees, 58 degrees, 59 degrees, 63 degrees, 58 degrees and 59 degrees respectively.

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