Four-blade spiral reamer

Abstract

The four-blade spiral reamer comprises a clamping block, a reamer body is arranged at the front end of the clamping block, a transition end is arranged at the front end of the reamer body, a reaming tool bit is arranged at the front end of the transition end, and a fine grinding head is arranged at the front end of the reaming tool bit. Four blade peaks with the same blades are uniformly and spirally arranged on the surface of the reaming tool bit; three groups of reinforcing blades are uniformly arranged on the outer sides of the blade peaks from front to back; the fine grinding head comprises a body, a thin blade is arranged at the front end of the body, the rear end of the body is fixedly connected with the center of the reaming tool bit, thin blade peaks are evenly and spirally arranged on the surface of the thin blade, and it is guaranteed that the reamer is high in rigidity and grinding precision, wide in application range and convenient to discharge chips.

Description

Technical Field

[0001] The utility model relates to the technical field of reamer cutters, in particular to a four-blade spiral reamer cutter. Background Art

[0002] A reamer is a hole processing tool that can be used on a drilling machine, lathe or manually to ream holes. It is a finishing tool that uses the side edge for cutting. The holes drilled by the drill bit with low dimensional accuracy and low wall finish are reamed by the reamer to make the hole accuracy and finish meet the requirements. It is composed of a cutting edge and a chip groove (generally made of solid carbide) and is mainly used to improve the cylindricity and roughness of the bottom hole.

[0003] Patent No. CN201320002148.X discloses a flexible reamer, which is connected in sequence by a clamping part, a neck and a working part. The surface of the neck is provided with a plurality of circumferential grooves, and the plurality of circumferential grooves are arranged alternately along the axial direction in sequence. By providing grooves in the neck of the reamer, the overall rigidity of the reamer is destroyed without losing torque, thereby increasing the flexibility of the reamer. During processing, the reamer can be adjusted according to the shape of the hole, thereby reducing the coaxiality requirement of the tool and extending the service life of the tool. The surface finish and concentricity of the processed hole are high. However, the flexible reamer has the following problems: first, the service life of the reamer blade is short. Second, fine grinding cannot be performed, and the finish of the hole cannot meet the requirements. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and solves the technical problems in the prior art that the openings cannot be finely ground, the finish of the holes is not high, and the holes are easily damaged by providing a hole expansion cutter head and a fine grinding head.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A four-blade spiral reamer comprises a clamping block, a reamer body is provided at the front end of the clamping block, a transition end is provided at the front end of the reamer body, a reamer head is provided at the front end of the transition end, and a fine grinding head is provided at the front end of the reamer head;

[0007] A reaming cutter head, wherein the surface of the reaming cutter head is evenly spirally provided with four identical blade peaks, and three groups of reinforcing blades are evenly provided on the outer side of the blade peaks from front to back;

[0008] The fine grinding head comprises a body, a front end of the body is provided with a fine blade, and a rear end of the body is fixedly connected to the center position of the reaming cutter head, and the surface of the fine blade is evenly spirally provided with fine blade peaks.

[0009] As a preference, the front end diameter of the reamer body is larger than the rear end diameter, and the transition end diameter is smaller than the front end diameter of the reamer body and larger than the rear end diameter of the reamer body.

[0010] As a preference, the transition end surface is evenly provided with chip grooves.

[0011] As a preferred embodiment, the front and rear ends of the reaming cutter head have the same diameter, and the outermost end of the blade peak is a rectangular surface.

[0012] As a preference, the reinforcing blade is a cemented carbide insert, and the reaming cutter head is a high-speed steel cutter head.

[0013] As another preferred embodiment, the outer side ends of the fine blade peaks are each provided with a layer of alloy tool steel, and the diameter of the fine grinding head is smaller than the diameter of the reaming cutter head.

[0014] Beneficial effects of the utility model:

[0015] (1) In the present invention, a clamping block is provided to facilitate connection of the entire rear end of the reamer, making installation more convenient.

[0016] (2) In the present invention, by providing a reamer body, the different diameters of the front and rear ends of the reamer body are utilized to ensure the rigidity of the entire reamer.

[0017] (3) In the utility model, a hole enlarging cutter head is provided to finely grind the hole drilled by the drill bit, and then a fine grinding head is used to finely grind the small diameter hole position. The fine grinding head can also be used to polish the detail position to achieve the required accuracy and smoothness of the hole.

[0018] In summary, the reamer has the advantages of strong rigidity, high grinding precision, wide adaptability, and convenient chip removal, and is particularly suitable for the field of reamer technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 It is a schematic diagram of the planar structure of the entire reamer in the utility model.

[0022] Figure 3 This is a schematic diagram of the position structure of the alloy tool steel layer in the utility model. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present utility model are clearly and completely described below in conjunction with the accompanying drawings.

[0024] Embodiment 1

[0025] like Figures 1 to 3 As shown, the utility model provides a four-blade spiral reamer, comprising a clamping block 1, a reamer body 2 is provided at the front end of the clamping block 1, a transition end 3 is provided at the front end of the reamer body 2, a reamer head 4 is provided at the front end of the transition end 3, and a fine grinding head 5 is provided at the front end of the reamer head 4;

[0026] A reaming cutter head 4, wherein the surface of the reaming cutter head 4 is evenly spirally provided with four identical blade peaks 41, and three groups of reinforcing blades 42 are evenly provided on the outer side of the blade peaks 41 from front to back;

[0027] The fine grinding head 5 comprises a body 51 , a fine blade 52 is provided at the front end of the body 51 , and a rear end of the body 51 is fixedly connected to the center of the reaming cutter head 4 , and a fine blade peak 53 is evenly spirally opened on the surface of the fine blade 52 .

[0028] Furthermore, the front end diameter of the reamer body 2 is larger than the rear end diameter, and the transition end 3 has a smaller diameter than the front end diameter of the reamer body 2 but larger than the rear end diameter of the reamer body 2. Thus, the reamer body 2 has strong rigidity, can bear a wide range of grinding forces, and is not easy to break.

[0029] Furthermore, the surface of the transition end 3 is evenly provided with chip removal grooves 31 to ensure convenient chip removal for the entire reamer.

[0030] Furthermore, the front and rear ends of the reaming cutter head 4 have the same diameter, and the outermost end of the blade peak 41 is a rectangular surface, which is convenient for setting the reinforcing blade 42, reducing the wear of the blade peak 41, and increasing the service life of the entire reamer.

[0031] Furthermore, the reinforcing blade 42 is a carbide insert, and the reaming cutter head 4 is a high-speed steel cutter head. The reinforcing blade 42 has high hardness, less wear during the grinding process, long service life, reduced replacement of the reamer, and cost savings. The reaming cutter head 4 is set to a high-speed steel cutter head to ensure its durability and cutting performance.

[0032] Furthermore, the outer end of the fine blade peak 53 is provided with a layer of alloy tool steel 531, and the diameter of the fine grinding head 5 is smaller than the diameter of the reaming cutter head 4. The fine grinding head 5 is used in smaller holes or for finishing grinding of details to ensure higher accuracy in the hole.

[0033] Working process: first connect the clamping block 1 to the rotating machine, and then the rotating machine drives the reamer to perform fine grinding on the hole that has been drilled by the drill bit, the fine grinding head 5 goes deep into the inside to perform fine grinding on the small diameter hole, and the reaming head 4 performs fine grinding on the large diameter hole on the outside. When reaming, the alloy tool steel layer 531 set on the surface of the fine blade peak 53 can ensure that the entire reamer is strong in rigidity and not easy to break, and then the fine grinding head 5 can also achieve detail position finish grinding, the entire reamer is strong in rigidity, the blade peak 41 has a long service life, the reamer reduces replacement, and saves costs.

[0034] In the description of the present invention, it should be understood that the terms "front and back", "left and right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the equipment or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0035] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0036] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art under the technical guidance of the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A four-edged spiral reamer, characterized in that: include A clamping block (1), wherein a reamer body (2) is provided at the front end of the clamping block (1), a transition end (3) is provided at the front end of the reamer body (2), a reamer head (4) is provided at the front end of the transition end (3), and a fine grinding head (5) is provided at the front end of the reamer head (4); A reaming cutter head (4), wherein the surface of the reaming cutter head (4) is evenly spirally provided with four identical blade peaks (41), and three groups of reinforcing blades (42) are evenly provided on the outer side of the blade peaks (41) from front to back; A fine grinding head (5) comprises a body (51), a fine blade (52) is provided at the front end of the body (51), and a rear end of the body (51) is fixedly connected to the center of a reaming cutter head (4), and a fine blade peak (53) is evenly spirally formed on the surface of the fine blade (52).

2. A four-edged spiral reamer according to claim 1, characterized in that: The front end diameter of the reamer body (2) is larger than the rear end diameter, and the transition end (3) has a diameter smaller than the front end diameter of the reamer body (2) and larger than the rear end diameter of the reamer body (2).

3. A four-edged spiral reamer according to claim 1, characterized in that: The surface of the transition end (3) is evenly provided with chip removal grooves (31).

4. A four-edged spiral reamer according to claim 1, characterized in that: The diameters of the front and rear ends of the reaming cutter head (4) are the same, and the outermost end of the blade peak (41) is a rectangular surface.

5. The four-edge spiral reamer according to claim 1, characterized in that: The reinforcing blade (42) is a hard alloy insert, and the reaming cutter head (4) is a high-speed steel cutter head.

6. A four-edged spiral reamer according to claim 1, characterized in that: The outer ends of the fine blade peaks (53) are each provided with a layer of alloy tool steel (531), and the diameter of the fine grinding head (5) is smaller than the diameter of the reaming cutter head (4).

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