Hard alloy welding reamer
By designing a carbide-welded reamer and using coaxially arranged first and second inserts, the problem of existing reamers requiring multiple reaming operations and tool changes has been solved, achieving efficient and precise hole machining.
Patent Information
- Application Number
- CN202423289328.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing reamers require two reaming operations and tool changes, resulting in low machining efficiency and poor hole accuracy.
Design a cemented carbide welding reamer, comprising first and second stepped portions, with first and second inserts respectively provided, the inserts having different cutting edge shapes, achieving coaxial arrangement, reducing cutting resistance and forming holes of different radii in one machining operation.
It improves machining accuracy and surface finish, reduces tool vibration, eliminates the need for tool replacement, and enhances machining efficiency and quality.
Smart Images
Figure CN223656148U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of cutters, in particular to a hard alloy welded reamer. BACKGROUND
[0002] A reamer is a cutter for machining holes on workpieces, and the reamer in the prior art is usually a reamer with spiral chip removal grooves. If the machining accuracy of the diameter of the hole is required to be high, the hole is usually formed by two times of machining, that is, a rough reamer is used to perform rough reaming first, the inner diameter of the hole after rough reaming is small, and because the cutting amount is large, the surface finish is poor. After rough reaming, a fine reamer is used to perform fine reaming, and the cutting amount of the fine reamer is small, so that the surface finish of cutting can be guaranteed. However, the coaxiality of the two reamings is difficult to guarantee, and the machining accuracy of the hole is affected. Moreover, the replacement of the cutter consumes time and reduces the machining efficiency of the hole. SUMMARY
[0003] The utility model aims at the problem that the existing reamer in the background art needs to perform reaming twice and needs to replace the cutter, resulting in low efficiency and poor machining accuracy of the hole, and provides a hard alloy welded reamer capable of solving the foregoing problem.
[0004] To achieve the above object, the utility model realizes the following technical scheme:
[0005] A hard alloy welded reamer comprises a cutter shaft and a cutter body, the cutter body is provided with a first step portion and a second step portion, the diameter of the second step portion is greater than that of the first step portion, two groups of first blade assembly portions are arranged on the outer circumferential surface of the first step portion, two groups of second blade assembly portions are arranged on the outer circumferential surface of the second step portion, the first blade assembly portions are notches arranged on the outer circumferential surface of the first step portion, the first blades are arranged in the notches of the first blade assembly portions, the first blades are welded to the first blade assembly portions, the second blade assembly portions are notches arranged on the outer circumferential surface of the second step portion, the second blades are arranged in the notches of the second blade assembly portions, the second blades are welded to the second blade assembly portions, and spiral chip removal grooves are arranged on the front sides of the first blade assembly portions and the second blade assembly portions. The first blades and the second blades are long strip-shaped blades, and the first blades and the second blades each comprise a first outer circumferential cutting edge, an oblique transition edge, a second outer circumferential cutting edge, and a chamfered edge arranged at the tail end of the second outer circumferential cutting edge. The outer diameter of the second outer circumferential cutting edge is greater than that of the first outer circumferential cutting edge.
[0006] In the above scheme, the first blade assembly and the second blade assembly are positioned at corresponding positions along the axial direction of the tool body, and the first blade and the second blade are positioned at corresponding positions along the axial direction of the tool body. This arrangement ensures that the first and second blades are subjected to uniform force during reaming, reducing tool body vibration and improving hole machining accuracy and surface finish.
[0007] In the above scheme, both the first and second blades are elongated blades, each including a first outer peripheral cutting edge, a beveled transition edge, a second outer peripheral cutting edge, and a chamfered edge at the tail end of the second outer peripheral cutting edge. This configuration allows for the simultaneous formation of two holes with different radii within the hole during reaming, with a beveled transition between the two holes. Furthermore, the opening of the outer hole can be chamfered, improving reaming efficiency and enhancing the concentricity of the hole.
[0008] In the above scheme, the cutting tool is a carbide cutting tool. This configuration ensures that the cutting tool's performance meets the workpiece's machining requirements. The most suitable cutting tool material can be selected based on the workpiece's material; for example, the cutting tool can be made of YG8 carbide, while the tool body and shank can be made of 45# steel.
[0009] In the above design, the notches of both the first and second blade assembly parts are right-angled notches. This design facilitates welding the blade to the corresponding blade assembly part and allows for easy adjustment of the blade assembly angle.
[0010] In the above scheme, the inclination angle between the cutting edges of the first and second blades and the blades is 3°-10°.
[0011] This invention offers several advantages: The carbide-welded reamer features a first stepped portion and a second stepped portion on its body. The diameter of the second stepped portion is larger than that of the first stepped portion. A first cutting edge and a second cutting edge are respectively positioned on the first and second stepped portions. This arrangement allows the first cutting edge to first ream the workpiece. After reaming, the second cutting edge continues to enlarge the hole. Because the first and second cutting edges are coaxial, completing the reaming in two stages reduces cutting resistance. Furthermore, the smaller cutting depth during enlargement improves the surface finish and overall machining quality. The carbide-welded reamer also features a first outer peripheral cutting edge, a beveled transition edge, a second outer peripheral cutting edge, and a chamfered edge at the tail of the second outer peripheral cutting edge. The outer diameter of the second outer peripheral cutting edge is larger than that of the first outer peripheral cutting edge. This further reduces feed resistance and improves the machining quality of the reamed hole. Moreover, during the reaming process, there is no need to change the cutting tool, which can greatly improve the processing efficiency and the quality of the hole. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the outer peripheral structure of the cemented carbide welding reamer of this utility model.
[0013] Figure 2 This is a schematic diagram of the front structure of the carbide welding reamer of this utility model.
[0014] Figure 3 This is a schematic diagram of the structure of the first and second blades.
[0015] The reference numerals in the figure are as follows: tool holder 1, tool body 2, first step 21, second step 22, first blade assembly 23, second blade assembly 24, first blade 3, first outer peripheral cutting edge 31, oblique transition edge 32, second outer peripheral cutting edge 33, chamfering edge 34, second blade 4, spiral chip removal groove 5. Detailed Implementation
[0016] The technical solution of this utility model will be clearly and completely described below through embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0017] like Figure 1 and 2 The carbide welded reamer shown includes a shank 1 and a body 2, which are integrally formed. The shank 1 and the body 2 can be made of common shank materials, such as 45# steel.
[0018] The blade body 2 is provided with a first step portion 21 and a second step portion 22. The diameter of the second step portion 22 is larger than the diameter of the first step portion 21. The first step portion 21 is provided with two sets of first blade assembly portions 23, and the second step portion 22 is provided with two sets of second blade assembly portions 24.
[0019] Two sets of first blade assembly parts 23 are arranged opposite to each other on the outer peripheral surface of the first step part 21. The first blade assembly part 23 is a notch provided on the outer peripheral surface of the first step part 21. The notch can be set as an approximately right angle notch. A first blade 3 is provided in the notch of the first blade assembly part 23. The first blade 3 is welded to the first blade assembly part 23.
[0020] Two sets of second blade assembly parts 24 are arranged opposite to each other on the outer peripheral surface of the second step part 22. The second blade assembly part 24 is a notch provided on the outer peripheral surface of the second step part 22. A second blade 4 is provided in the notch of the second blade assembly part 24. The second blade 4 is welded to the second blade assembly part 24.
[0021] Spiral chip removal grooves 5 are provided on the front side of the first blade assembly part 23 and the second blade assembly part 24, respectively.
[0022] like Figure 3 As shown, both the first insert 3 and the second insert 4 are elongated inserts, and the inserts can be made of YG8 cemented carbide. Both the first insert 3 and the second insert 4 include a first outer peripheral cutting edge 31, a beveled transition edge 32, a second outer peripheral cutting edge 33, and a chamfering edge 34 located at the tail end of the second outer peripheral cutting edge 33. The outer diameter of the second outer peripheral cutting edge 33 is larger than the outer diameter of the first outer peripheral cutting edge 31. This configuration allows for the simultaneous formation of two holes with different radii within the hole during reaming, with a beveled transition between the two holes. Furthermore, the opening of the outer end hole can be chamfered, improving reaming efficiency and enhancing the concentricity of the hole.
[0023] The first blade assembly 23 and the second blade assembly 24 are positioned at corresponding positions along the axial direction of the tool body 2, and the first blade 3 and the second blade 4 are positioned at corresponding positions along the axial direction of the tool body 2. This arrangement ensures that the first blade 3 and the second blade 4 are subjected to uniform force during reaming, reducing vibration of the tool body 2 and improving the machining accuracy and surface finish of the hole.
[0024] The inclination angle α between the cutting edge of the first blade 3 and the blade of the second blade 4 is 3°-10°, for example, it can be set to 5°.
[0025] This utility model discloses a cemented carbide welding reamer with a first step and a second step on the cutter body. The diameter of the second step is larger than that of the first step. A first cutting tool and a second cutting tool are respectively installed on the first step and the second step. With this arrangement, when machining a workpiece, the first cutting tool can first ream the workpiece. After the first cutting tool completes the reaming, the feed continues and the second cutting tool begins to enlarge the hole. Because the first cutting tool and the second cutting tool are coaxial, completing the reaming in two steps can reduce the cutting resistance during reaming. During enlargement, because the cutting amount is smaller, the surface finish of the hole can be improved, thus improving the machining quality.
[0026] This utility model discloses a carbide welding reamer. Both the first and second inserts are equipped with a first outer peripheral cutting edge, a beveled transition edge, a second outer peripheral cutting edge, and a chamfering edge at the tail end of the second outer peripheral cutting edge. The outer diameter of the second outer peripheral cutting edge is larger than that of the first outer peripheral cutting edge. This design further reduces the feed resistance and improves the machining quality of the reamed hole. Moreover, no tool change is required during the reaming process, significantly improving machining efficiency and enhancing the hole's machining quality.
[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the scope and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A carbide welding reamer, characterized in that: The tool includes a tool holder and a tool body. The tool body has a first stepped portion and a second stepped portion. The diameter of the second stepped portion is larger than that of the first stepped portion. The first stepped portion has two sets of first blade assembly portions, and the second stepped portion has two sets of second blade assembly portions. The two sets of first blade assembly portions are arranged opposite to each other on the outer peripheral surface of the first stepped portion. The first blade assembly portion is a notch on the outer peripheral surface of the first stepped portion, and a first blade is provided in each notch of the first blade assembly portion. The first blade is welded to the first blade assembly portion. The two sets of second blade assembly portions are arranged opposite to each other on the outer peripheral surface of the second stepped portion. The second blade assembly portion is a notch on the outer peripheral surface of the second stepped portion, and a second blade is provided in each notch of the second blade assembly portion. The second blade is welded to the second blade assembly portion. Spiral chip removal grooves are provided on the front side of the first blade assembly portion and the second blade assembly portion respectively. The first blade and the second blade are both long blades. The first blade and the second blade include a first outer peripheral cutting edge, a beveled transition edge, a second outer peripheral cutting edge, and a chamfering edge provided at the tail end of the second outer peripheral cutting edge. The outer diameter of the second outer peripheral cutting edge is larger than that of the first outer peripheral cutting edge.
2. The carbide welding reamer according to claim 1, characterized in that: The first blade assembly and the second blade assembly are located at corresponding positions along the axial direction of the blade body, and the first blade and the second blade are located at corresponding positions along the axial direction of the blade body.
3. The carbide welding reamer according to claim 1, characterized in that: The blade is a cemented carbide blade.
4. The carbide welding reamer according to claim 1, characterized in that: The notches in both the first blade assembly and the second blade assembly are right-angled notches.
5. The carbide welding reamer according to claim 1, characterized in that: The inclination angle between the cutting edges of the first and second blades and the blades is 3°-10°.