Hard alloy reamer

Abstract

The hard alloy reamer comprises a reamer body with a rotation axis, a plurality of reamer ridges are formed on the circumferential surface of the reamer body through machining, and the reamer ridges are obliquely arranged on the reamer body around the rotation axis of the reamer body. The reamer has the beneficial effects that the feeding amount in the reamer machining process is reduced, the temperature rising speed of the reamer is slowed down, the damage possibility of the reamer is reduced, and meanwhile the service life of the reamer is prolonged.

Description

Technical Field

[0001] The present application relates to the field of reamers, and in particular to a cemented carbide reamer. Background Art

[0002] A reamer is a rotary cutting tool used to perform reaming operations, and includes a cutter head having a rotation axis. The cutter head has a front end and a peripheral surface extending backward from the front end, and the peripheral surface includes at least two ridges, and the at least two ridges extend backward from the front end of the cutter head and are separated by a chip groove provided on the cutter head. At present, common reamers have a small number of blades, and the blade shape is a straight blade.

[0003] With respect to the above-mentioned related technologies, the inventors believe that the feed rate of the existing common straight-blade reamer will increase during the processing process, which will cause the temperature of the reamer itself to easily increase, and there is a defect that increases the possibility of reamer damage. Summary of the invention

[0004] In order to reduce the feed amount during the reamer processing, reduce the possibility of reamer damage and increase the service life of the reamer, the present application provides a cemented carbide reamer.

[0005] The present application provides a cemented carbide reamer adopting the following technical solution:

[0006] A cemented carbide reamer comprises a cutter body with a rotation axis. A plurality of cutter ridges are machined and formed on the peripheral surface of the cutter body. The cutter ridges are arranged on the cutter body at an angle around the cutter body rotation axis.

[0007] By adopting the above technical solution, the blade spine processed around the rotation axis of the cutter body can reduce the feed amount of the reamer during the processing process compared to the straight-edged reamer, and effectively slow down the rate at which the reamer's own temperature rises during the processing, thereby reducing the possibility of the reamer being damaged during operation, thereby increasing the service life of the reamer, and can also significantly increase the cutting frequency of the reamer and improve work efficiency.

[0008] Optionally, the blade spine is a left spiral, and a cutting edge cutting to the right is formed on the left edge of the blade spine.

[0009] By adopting the technical solution, the applicability of the reamer is enhanced.

[0010] Optionally, there are ten blade spines.

[0011] By adopting the above technical solution, increasing the number of blade ridges can effectively improve the working efficiency of the reamer, thereby further reducing the heating rate of the reamer itself.

[0012] Optionally, the angles between two adjacent blade ridges are 35° and 37° respectively.

[0013] By adopting the above technical solution, the force uniformity of the cutter body during cutting is improved, and the possibility of cutting chips being cut off is increased.

[0014] Optionally, the reamer further comprises a handle integrally formed with the cutter body;

[0015] An end edge is formed at one end of the knife spine away from the knife handle.

[0016] By adopting the above technical solution, the end blade and the cutting blade are arranged in a V shape, which effectively reduces the load borne by the cutting blade during operation, enhances the heat dissipation performance of the cutting blade, and is conducive to extending the service life of the reamer.

[0017] Optionally, a tail blade is formed at one end of the blade spine close to the blade handle.

[0018] By adopting the above technical solution, during the rotation of the reamer, the tail blade can increase the possibility of cutting off continuous cutting chips, reduce the friction between the cutting blade and the continuous cutting chips, and further help slow down the heating rate of the reamer itself.

[0019] Optionally, a chip removal groove is provided between the blade ridges, and two ends of the chip removal groove are respectively connected to the end surface of the blade body facing away from the blade handle and the peripheral surface of the blade handle.

[0020] By adopting the above technical solution, the chip discharge is facilitated while the direct contact area between the handle and the blade spine is significantly increased, which is further beneficial to the heat dissipation of the blade body.

[0021] Optionally, the depth of the chip groove gradually becomes shallower from the end edge toward the tool handle.

[0022] By adopting the above technical solution, it is further facilitated for the cutting chips to be discharged from the chip discharge groove.

[0023] Optionally, the side edge of the chip removal groove located on a section of the tool handle is an arc-shaped edge.

[0024] By adopting the above technical solution, compared with a straight edge, it is further facilitated to discharge cutting chips.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. By setting a blade spine obliquely arranged on the blade body around the rotation axis of the blade body, the feed amount of the reamer can be reduced during the processing compared to a straight-edged reamer, and the speed at which the temperature of the reamer itself rises during the processing can be effectively slowed down, thereby reducing the possibility of the reamer being damaged during the working process, thereby prolonging the service life of the reamer, and significantly increasing the cutting frequency of the reamer and improving work efficiency;

[0027] 2. By setting the angles between the blade ridges to 35° and 37° respectively, the force uniformity of the blade during cutting is improved, and the possibility of cutting chips being cut off is increased;

[0028] 3. By setting the end blade, the end blade and the cutting blade are arranged in a V shape, which effectively reduces the load borne by the cutting blade during operation, enhances the heat dissipation performance of the cutting blade, and is conducive to extending the service life of the reamer. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of a cemented carbide reamer.

[0030] Figure 2 It is a structural diagram of the end face of the cutter body.

[0031] Explanation of the reference numerals: 1. tool body; 11. tool spine; 12. end edge; 13. tail edge; 2. tool handle; 21. arc chamfer; 3. chip groove. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-2 , further details of this application are given.

[0033] The present application embodiment discloses a cemented carbide reamer, referring to Figure 1 The reamer includes a cutter body 1 and a cutter handle 2 which are integrally formed, and the rotation axes of the cutter body 1 and the cutter handle 2 coincide with each other. The cutter body 1 and the cutter handle 2 are both made of cemented carbide material, which has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, and heat resistance. Cemented carbide material is widely used and can significantly improve the service life and cutting efficiency of the cutter body 1.

[0034] Reference Figure 1 One end of the blade body 1 is integrally connected with one end of the blade handle 2, and the diameter of the blade body 1 is larger than the diameter of the blade handle 2. Ten blade spines 11 are formed on the peripheral surface of the blade body 1 around the rotation axis of the blade body 1, and the formation direction of the blade spine 11 is a left spiral direction, and the left edge of the blade spine 11 away from the blade body 1 is formed with a cutting edge, so that the cutting edge becomes a left spiral right cutting cutting edge, so that the reamer can be adapted to common processing tools, significantly improving the versatility of the reamer.

[0035] Reference Figure 2 The ten cutting edges are evenly arranged on the circumference of the blade body 1, and the interval angles between the cutting edges on two adjacent blade spines 11 are 35° and 37° respectively. Setting adjacent cutting edges at two different interval angles can effectively improve the force uniformity of the reamer during operation, thereby facilitating the cutting edges to cut off continuous cutting chips.

[0036] Reference Figure 1An end blade 12 is formed on the end of the blade spine 11 away from the blade handle 2. The end blade 12 and the cutting blade are arranged in a V-shape at the front end of the blade body 1, which can not only improve the reamer's ability to accurately position the workpiece during the processing, but also improve the reamer's cutting efficiency, which is beneficial to reducing the load applied to the cutting blade after the cutting blade contacts the workpiece, reducing the cutting blade wear on the blade spine 11, and thus improving the heat dissipation conditions of the cutting blade, slowing down the heating rate of the blade spine 11 during operation, protecting the blade body 1, and reducing the possibility of the reamer being damaged during operation, thereby helping to extend the service life of the reamer.

[0037] Reference Figure 2 On the end face of the shank 2 away from the blade body 1, an arc chamfer 21 is formed along the circular edge of the shank 2. Without destroying the structural strength of the shank 2 and ensuring that the shank 2 is used as small as possible, the arc chamfer 21 can directly reduce the area of ​​the end face of the shank 2, thereby facilitating the shank 2 to be clamped more conveniently.

[0038] Reference Figure 1 A tail blade 13 is formed on one end of the blade spine 11 near the blade handle 2, and the tail blade 13 and the cutting blade are also arranged in a V shape at the tail end of the blade body 1. The tail blade 13 can significantly increase the probability of direct cutting with the cutting chips. The tail blade 13 cooperates with the cutting blade to effectively cut off the continuous cutting chips, thereby reducing the direct contact and friction between the large-volume cutting chips and the blade body 1, which is beneficial for the blade body 1 to reduce the heating rate.

[0039] Reference Figure 1 The reamer is provided with a chip groove 3, which is provided between two adjacent blade ridges 11. One end of the chip groove 3 is connected to the end surface of the tool body 1 processed with the end edge 12, and the other end of the chip groove 3 is connected to the outer peripheral surface of the tool handle 2. The bottom of the chip groove 3 is an inclined surface, that is, the depth of the notch of the chip groove 3 gradually becomes shallower from the end edge 12 to the tool handle 2, so as to facilitate the rapid discharge of the cutting chips in the chip groove 3, reduce the possibility of the cutting chips temporarily existing in the chip groove 3, effectively control the heating rate of the tool body 1 during operation, and help to extend the service life of the tool body 1.

[0040] Reference Figure 1 The right edge of the chip groove 3 at one end of the tool handle 2 is processed into an arc-shaped edge. Compared with a straight edge, the arc-shaped edge is more conducive to the discharge of cutting chips in the chip groove 3.

[0041] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cemented carbide reamer, characterized in that: The invention comprises a knife body (1) having a rotation axis, wherein a plurality of knife ridges (11) are machined and formed on the peripheral surface of the knife body (1), and the knife ridges (11) are arranged on the knife body (1) at an angle around the rotation axis of the knife body (1).

2. A cemented carbide reamer according to claim 1, characterized in that: The blade spine (11) is a left spiral, and a right-cutting cutting edge is formed on the left edge of the blade spine (11).

3. A cemented carbide reamer according to claim 1 or 2, characterized in that: Ten blade ridges (11) are provided.

4. A cemented carbide reamer according to claim 3, characterized in that: The included angles between two adjacent blade ridges (11) are 35° and 37° respectively.

5. A cemented carbide reamer according to claim 4, characterized in that: The reamer also includes a handle (2) formed integrally with the cutter body (1); An end blade (12) is formed on the end of the blade spine (11) away from the blade handle (2).

6. A cemented carbide reamer according to claim 5, characterized in that: A tail blade (13) is formed on one end of the blade spine (11) close to the blade handle (2).

7. The cemented carbide reamer according to claim 5, characterized in that: A chip removal groove (3) is provided between the blade ridges (11), and two ends of the chip removal groove (3) are respectively connected to the end surface of the blade body (1) facing away from the blade handle (2) and the peripheral surface of the blade handle (2).

8. A cemented carbide reamer according to claim 7, characterized in that: The depth of the chip removal groove (3) gradually becomes shallower from the end edge (12) towards the tool handle (2).

9. A cemented carbide reamer according to claim 7 or 8, characterized in that: The side edge of the chip removal groove (3) located on a section of the tool handle (2) is an arc-shaped edge.

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