Reamer with multiple cutting edges and multiple guide bars

Abstract

The utility model provides a multi-cutting-edge multi-guide-bar reamer which comprises a reamer body, a plurality of guide bars and a plurality of cutting edges are arranged on the head portion of the reamer body in the circumferential direction, cutting edges of front reamer faces of the cutting edges are located on a cutting circle of the reamer, guide cambered surfaces of the guide bars are attached to the cutting circle, and the guide cambered surfaces of the guide bars are attached to the cutting circle. Wherein the cutting edge of the front cutter face of one cutting edge is located on the guide cambered surface of one guide strip at a symmetric point which is radially symmetric by taking the axis of the reamer as a symmetric center, and the distance between the cutting edge of the front cutter face of the cutting edge and the guide cambered surface of the guide strip is equal to the diameter of a cutting circle. In the reamer production process, a simple measuring tool (such as a caliper and a micrometer) can be used for directly measuring the distance between the two structures, so that the diameter of the reamer is quickly and accurately obtained, and compared with a traditional reamer structure, the measuring process is greatly simplified.

Description

Technical Field

[0001] The utility model relates to the field of mechanical design, in particular to a reamer with multiple cutting edges and multiple guide strips. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] A reamer is a rotating tool used to remove metal from a machined hole. The hole can be precisely sized and shaped after reaming. In existing technology, the size of a reamer cannot be quickly determined. Therefore, a new reamer with convenient size measurement is urgently needed.

[0004] It should be noted that the above technical background is merely for the purpose of providing a clear and complete description of the technical solutions of the present invention and to facilitate understanding by those skilled in the art. It should not be assumed that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present invention. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a reamer with multiple cutting edges and multiple guide strips.

[0006] In order to solve the above technical problems, the utility model provides a multi-cutting edge and multi-guide strip reamer, including a cutter body, wherein the cutter body head is provided with multiple guide strips and multiple cutting edges along the circumferential direction, the cutting edges of the rake faces of the multiple cutting edges are located on the cutting circle of the reamer, and the guide arc surfaces of the multiple guide strips are in contact with the cutting circle. The cutting edge of the rake face of one of the cutting edges is radially symmetrical with the reamer axis as the symmetry center and falls on the guide arc surface of one of the guide strips. The distance between the cutting edge of the rake face of the cutting edge and the guide arc surface of the guide strip is the diameter of the cutting circle.

[0007] Preferably, the reamer comprises two guide bars and three cutting edges, and the two guide bars are arranged between two adjacent cutting edges.

[0008] Preferably, a plurality of grooves are provided on the side wall of the cutter body in the axial direction, the plurality of grooves are arranged in the circumferential direction, and the guide bars and cutting edges are welded in the grooves.

[0009] Preferably, the cutting edge and the guide bar extend axially beyond the end face of the cutter body, and the cutting edge extends axially beyond the guide bar by 0.005-0.007 mm.

[0010] Preferably, the cutting edge of the rake face of one of the cutting edges is radially symmetrical with the reamer axis as the symmetry center and falls at the center position of the guide arc surface of one of the guide bars, which is the measuring point of the center position of the guide arc surface of the guide bar.

[0011] The present application also provides a method for measuring the cutting circle size of a reamer, comprising using a measuring tool to measure the maximum distance between the cutting edge of the rake face of the mutually symmetrical cutting edge and the guide arc surface of the guide bar, where the maximum distance is the diameter of the cutting circle.

[0012] Preferably, the measuring tool is a micrometer or a caliper.

[0013] By means of the above technical solution, the beneficial effects of the present invention are as follows:

[0014] The multi-cutting-edge and multi-guide-strip reamer of the present invention places the cutting edge of the rake face of one of the cutting edges on the guide arc surface of one of the guide strips in a radially symmetrical manner with the reamer axis as the symmetry center. During the production of the reamer, simple measuring tools (such as calipers and micrometers) can be used to directly measure the distance between the two structures, thereby quickly and accurately obtaining the diameter of the reamer. This greatly simplifies the measurement process compared to traditional reamer structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the reamer of the present application.

[0016] Figure 2 It is a partial structural diagram of the reamer of the present application.

[0017] Figure 3 It is a schematic diagram of the end face structure of the reamer of the present application.

[0018] Figure 4 It is a schematic structural diagram of the cutting edge of the present application.

[0019] Among them: 1. Cutting body; 2. Guide strip; 3. Cutting edge; 11. Axis; 12. Groove; 31. Rake face; 21. Measuring point; 4. Cutting circle; 32. Cutting edge; 33. Welding surface of cutting edge. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] It should be noted that, in the description of this utility model, the terms "first," "second," etc., are used solely for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0022] like Figure 1-4 As shown, the utility model provides a multi-cutting-edge, multi-guide-strip reamer, comprising a cutter body 1. The head of the cutter body 1 is provided with multiple guide strips 2 and multiple cutting edges 3 along the circumferential direction. The cutting edges 32 of the rake faces 31 of the multiple cutting edges 3 are located on the cutting circle 4 of the reamer. The guide arc surfaces of the multiple guide strips 2 are aligned with the cutting circle 4. The cutting edge 32 of the rake face 31 of one cutting edge 3 is radially symmetrical with respect to the reamer axis 11 and falls on the guide arc surface of one of the guide strips 2. The distance between the cutting edge 32 of the rake face 31 of the cutting edge 3 and the guide arc surface of the guide strip 2 is the diameter of the cutting circle 4. The multiple cutting edges 3 increase the number of cutting points, thereby improving cutting efficiency. The design of multiple guide strips 2 can improve the roundness of the processed hole.

[0023] like Figure 3 As shown, the reamer includes two guide bars 2 and three cutting edges 3. The two guide bars 2 are arranged between two adjacent cutting edges 3. A plurality of grooves 12 are provided on the side wall of the cutter body 1 in the axial direction. The plurality of grooves 12 are arranged in the circumferential direction. The guide bars 2 and cutting edges 3 are welded in the grooves 12. Figure 4 As shown, the cutting edge 3 includes two welding surfaces 33 , which are welded to the groove surface of the cutter body 1 . The cutting edge 32 is located at the outermost side of the rake face 31 , and the cutting edge 32 is the position of the cutting edge 3 farthest from the axis 11 .

[0024] like Figure 1 and 3 As shown, the cutting edge 3 covers part of the groove 12, and the groove behind the cutting edge 3 forms a channel for chip removal. The guide bar 2 covers part of the groove 12, and the groove in front of the guide bar 2 forms a channel for chip removal. The cutting edge 3 is axially arranged at the end of the groove 12, and the tail of the cutting edge 3 is a distance away from the bottom of the groove 12.

[0025] like Figure 2 As shown, the cutting edge 3 and the guide bar 2 extend axially beyond the end face of the cutter body 1, with the cutting edge 3 extending axially by 0.005-0.007 mm beyond the guide bar 2. This axial extension of the cutting edge 3 allows the cutting edge 3 to contact the workpiece at a suitable angle during initial cutting, thus preventing excessive wear on the cutting edge 32 caused by an improper cutting angle.

[0026] In a preferred embodiment, the cutting edge 32 of the front face 31 of one of the cutting edges 3 is radially symmetrical with the reamer axis 11 as the symmetry center, and the symmetry point falls on the center position of the guide arc surface of one of the guide bars 2, and the measuring point 21 of the center position of the guide arc surface of the guide bar 2. During the processing, the cutting edge 3 will generate a radial force pointing in a certain circumferential direction. Due to the positional relationship of the symmetry point, the relative position of the guide bar 2 in this direction can provide a reverse support force. In this structure, the specific layout of the guide bar 2 and the cutting edge 3 on the circumference enables them to respond to each other when subjected to force. Specifically, the guide bar 2 is in close contact with the hole wall. When the cutting edge 3 is subjected to radial force and attempts to deviate the reamer from the circumferential direction, the guide bar 2 will be subjected to a reaction force from the hole wall. This reaction force can effectively offset part of the radial force generated by the cutting edge 3.

[0027] The present application also provides a method for measuring the size of the cutting circle 4 of a reamer, wherein a measuring tool is used to measure the maximum distance between the cutting edge 32 of the rake face 31 of the mutually symmetrical cutting edge 3 and the guide arc surface of the guide bar 2. This maximum distance is the diameter of the cutting circle 4. The measuring tool is a micrometer or a caliper.

[0028] The multi-cutting-edge and multi-guide-strip reamer of the present invention places the cutting edge 32 of the rake face 31 of one of the cutting edges 3 on the guide arc surface of one of the guide strips in a radially symmetrical manner with the reamer axis 11 as the symmetry center. During the production of the reamer, a simple measuring tool (such as a caliper or micrometer) can be used to directly measure the distance between the two structures, thereby quickly and accurately obtaining the diameter of the reamer. This greatly simplifies the measurement process compared to traditional reamer structures.

[0029] The above-described embodiments are merely preferred embodiments for the purpose of fully illustrating the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are within the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

Claims

1. A multi-cutting-edge, multi-guide-strip reamer, comprising a cutter body, wherein the cutter body head is provided with a plurality of guide strips and a plurality of cutting edges along a circumferential direction, wherein the cutting edges of the rake faces of the plurality of cutting edges are located on a cutting circle of the reamer, and the guide arc surfaces of the plurality of guide strips are in contact with the cutting circle, characterized in that: The cutting edge of the rake face of one of the cutting edges is radially symmetrical with the reamer axis as the symmetry center and falls on the guide arc surface of one of the guide bars. The distance between the cutting edge of the rake face of the cutting edge and the guide arc surface of the guide bar is the diameter of the cutting circle.

2. The reamer according to claim 1, characterized in that The reamer comprises two guide bars and three cutting edges, wherein the two guide bars are arranged between two adjacent cutting edges.

3. The reamer according to claim 1, characterized in that A plurality of grooves are provided on the side wall of the cutter body in the axial direction. The grooves are arranged in the circumferential direction. The guide bars and cutting edges are welded in the grooves.

4. The reamer according to claim 1, characterized in that The cutting edge and the guide bar extend beyond the end face of the cutter body in the axial direction, and the cutting edge extends beyond the guide bar in the axial direction by 0.005-0.007 mm.

5. The reamer according to claim 1, characterized in that The cutting edge of the rake face of one of the cutting edges is radially symmetrical with the reamer axis as the symmetry center, and the symmetry point falls on the center position of the guide arc surface of one of the guide bars, which is the measuring point of the center position of the guide arc surface of the guide bar.

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