Inner-cooling forming reamer for machining inner hole

Abstract

The utility model discloses an inner-cooling forming reamer for machining an inner hole. The blade part and the handle part are integrally formed; the blade part is sequentially provided with a hole bottom deburring blade, a first inner hole forming blade, an anti-tipping blade, an inner hole side blade, a second inner hole forming blade and an orifice burr pressing blade from front to back. A first chip groove; the first chip groove and the second chip groove are oppositely formed in the two sides of the blade part from the end part to the tail part of the blade part; and the double straight inner cooling holes which penetrate through the first chip groove and the second chip groove are symmetrically formed in the handle part along the central axis. According to the inner-cooling forming reamer for machining the inner hole, by optimizing the structure and improving a cooling system, the durability and the machining quality of the reamer are improved, the cooling effect and the chip removal efficiency are improved, and therefore the problems that in the prior art, a reamer point of an inner-cooling forming reamer cracks, and the cooling effect is poor are solved, and the service life of the reamer is prolonged. The application prospect is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting tools, in particular to an internal cold forming reamer for processing inner holes. Background Art

[0002] The internal cold forming reamers in the prior art often encounter problems of tool tip cracking and poor cooling effect when processing inner holes. Tool tip cracking is usually caused by excessive impact force on the tool during high-speed rotation and cutting, and the structural strength of the tool tip is not enough to withstand such impact, resulting in fatigue or breakage of the tool tip material. Poor cooling effect will cause the temperature of the cutting area to rise, the metal material to soften, and thus produce chip sticking, which not only affects the processing quality, but also accelerates tool wear and reduces tool life.

[0003] Therefore, in order to solve the above technical problems, the utility model designs an internal cold forming reamer for processing inner holes. Through structural optimization and improvement of the cooling system, not only the durability and processing quality of the tool are improved, but also the cooling effect and chip removal efficiency are improved, thereby solving the problems of tip cracking and poor cooling effect of the internal cold forming reamer in the prior art. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above-mentioned shortcomings, the purpose of the utility model is to provide an internal cold forming reamer for processing inner holes, which has a reasonable design. Aiming at the problems of tool tip chipping and poor cooling effect leading to chip sticking in the internal cold forming reamer in the prior art, an anti-chipping edge is provided between the inner hole forming edge and the inner hole side edge, which can reduce the problem of tool tip chipping. By providing a first chip groove and a second chip groove and providing double straight internal coolant holes that penetrate the inside of the shank to the first chip groove and the second chip groove, the cooling and chip removal effects are improved, and the application prospect is broad.

[0005] Technical solution: An internal cold forming reamer for processing inner holes, comprising:

[0006] handle;

[0007] The blade portion is integrally formed with the handle portion; the blade tip of the blade portion is provided with a hole bottom deburring blade, an inner hole forming blade 1, an anti-collapse blade, an inner hole side blade, an inner hole forming blade 2, and a hole mouth deburring blade in sequence from front to back;

[0008] First chip flute;

[0009] A second chip removal groove, wherein the first chip removal groove and the second chip removal groove are arranged on both sides of the blade from the end to the tail of the blade;

[0010] Double straight inner cooling holes, the inner part of the shank is symmetrically provided along the central axis with double straight inner cooling holes penetrating the first chip removal groove and the second chip removal groove.

[0011] The internal cold forming reamer for processing inner holes described in the utility model aims at the problems of chipping of the tool tip and poor cooling effect leading to chip sticking in the internal cold forming reamer in the prior art. An anti-chipping edge (chamfer) is provided between the inner hole forming edge and the inner hole side edge, thereby increasing the structural strength of the tool tip, reducing the stress concentration of the tool tip when impacted, and thus reducing the risk of tool tip chipping. The first chip groove and the second chip groove are provided to facilitate rapid discharge of chips and reduce the accumulation of chips on the tool. In addition, the double straight internal coolant holes are symmetrically provided along the central axis inside the shank and penetrate the first chip groove and the second chip groove, thereby ensuring that the coolant can directly reach the cutting area, thereby improving the cooling effect, effectively reducing the cutting temperature, reducing the generation of chip sticking, and increasing the tool life.

[0012] Among them, the first chip removal groove and the second chip removal groove are both close to straight grooves and have good chip removal function.

[0013] Furthermore, in the above-mentioned internal cold forming reamer for processing inner holes, the angle formed by the deburring blade at the bottom of the hole and the horizontal central axis is 20°.

[0014] Furthermore, in the above-mentioned internal cold forming reamer for processing inner holes, the angle formed by the inner hole forming blade 1 and the horizontal central axis is 60°.

[0015] Furthermore, in the above-mentioned internal cold forming reamer for processing inner holes, the angle formed by the anti-chipping edge and the horizontal central axis is 45°.

[0016] Furthermore, in the above-mentioned internal cold forming reamer for processing the inner hole, the inner hole side cutting edge is arranged horizontally.

[0017] Furthermore, in the above-mentioned internal cold forming reamer for processing inner holes, the angle formed by the second inner hole forming blade and the horizontal central axis is 45°.

[0018] Furthermore, in the above-mentioned internal cold forming reamer for processing inner holes, the angle formed by the hole mouth burr pressing blade and the horizontal central axis is 80°.

[0019] Furthermore, in the above-mentioned internally cold-formed reamer for processing inner holes, outlets of the double straight internally cold-formed holes are close to the cutting edge.

[0020] By placing the outlet of the double straight inner coolant holes as close to the cutting edge as possible, the iron chips can be easily taken away by direct spraying, which has a good chip removal effect and helps to improve the product qualification rate and product quality.

[0021] The beneficial effects of the utility model are as follows: the internal cold forming reamer for processing inner holes described in the utility model has a reasonable structural design, and an anti-chipping edge is arranged between the inner hole forming blade 1 and the inner hole side blade, which increases the structural strength of the tool tip and reduces the stress concentration of the tool tip when it is impacted, thereby reducing the risk of tool tip chipping; by arranging the first chip groove and the second chip groove, it is helpful to quickly discharge chips and reduce the accumulation of chips on the tool, and by symmetrically arranging the double straight internal coolant holes penetrating the first chip groove and the second chip groove along the central axis inside the shank, it is ensured that the coolant can directly reach the cutting area, improves the cooling effect, effectively reduces the cutting temperature, reduces the generation of sticky chips, and increases the tool life; the precise design of the hole bottom deburring blade, the inner hole forming blade 1, the anti-chipping edge, the inner hole side blade, and the inner hole forming blade 2 at equal angles ensures the accuracy of the forming contour and improves the processing quality; through structural optimization and improvement of the cooling system, the problems of tool tip chipping and poor cooling effect of the internal cold forming reamer in the prior art are solved, and the application prospect is broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the internal cold forming reamer for processing inner holes according to the utility model;

[0023] Figure 2 It is a schematic diagram of the blade structure of the internal cold forming reamer for processing inner holes according to the utility model;

[0024] Figure 3 The schematic diagram of the blade tip structure of the internal cold forming reamer for processing inner holes in the utility model Figure 1 ;

[0025] Figure 4 The schematic diagram of the blade tip structure of the internal cold forming reamer for processing inner holes in the utility model Figure 2 ;

[0026] Figure 5 It is a side view of the internal cold forming reamer for processing inner holes according to the utility model;

[0027] Figure 6 It is an enlarged schematic diagram of the anti-chipping portion of the internal cold forming reamer for processing the inner hole of the utility model;

[0028] In the figure: handle 1, blade 2, blade tip 21, hole bottom deburring blade 211, inner hole forming blade 1 212, anti-collapse blade 213, inner hole side blade 214, inner hole forming blade 215, hole mouth deburring blade 216, first chip groove 3, second chip groove 4, double straight inner cooling hole 5, angle a formed by hole bottom deburring blade and horizontal center axis, angle b formed by inner hole forming blade 1 and horizontal center axis, angle c formed by anti-collapse blade 213 and horizontal center axis, angle d formed by inner hole forming blade 2 and horizontal center axis, angle e formed by hole mouth deburring blade and horizontal center axis. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1 , 2 , 3, 4, 5, 6 and Example 1 and Example 2 further illustrate the utility model.

[0030] Example 1

[0031] The internal cold forming reamer for processing inner holes described in the utility model aims to improve the durability and processing quality of the tool, and also improve the cooling effect and chip removal efficiency through structural optimization and improvement of the cooling system, in view of the problems that the internal cold forming reamer in the prior art often encounters tool tip cracking and poor cooling effect when processing inner holes.

[0032] like Figure 1 , 2 As shown in Figures 3, 5 and 6, the internal cold forming reamer for processing inner holes described in the utility model comprises a shank 1 and a blade 2. The blade 2 is integrally formed with the shank 1. A first chip groove 3 and a second chip groove 4 are relatively arranged on both sides of the blade 2 from the end to the tail. The arrangement of the first chip groove 3 and the second chip groove 4 facilitates the rapid discharge of chips, reduces the accumulation of chips on the tool, and also reduces the wear of the chips on the tool. Double straight internal cooling holes 5 penetrating the first chip groove 3 and the second chip groove 4 are symmetrically arranged inside the shank 1 along the central axis, ensuring that the coolant can directly reach the cutting area, thereby improving the cooling effect, effectively reducing the cutting temperature, and reducing the generation of sticky chips.

[0033] Furthermore, the first chip removal groove 3 and the second chip removal groove 4 are both close to straight grooves and have good chip removal function.

[0034] Furthermore, the tip 21 of the blade portion 2 is provided with a hole bottom deburring blade 211, an inner hole forming blade 1 212, an anti-collapsing blade 213, an inner hole side blade 214, an inner hole forming blade 215, and a hole mouth deburring blade 216 in sequence from front to back, thereby ensuring the forming profile. By providing an anti-collapsing blade (chamfer) between the inner hole forming blade 1 212 and the inner hole side blade 214, the structural strength of the blade tip 21 is increased, and the stress concentration of the blade tip 21 when impacted is reduced, thereby reducing the risk of the blade tip 21 collapsing.

[0035] Example 2

[0036] Based on the structural basis of Example 1 above, Figure 1 , 2 , 3, 4, 5, and 6.

[0037] like Figure 3 , 4 As shown in 6, the internal cold forming reamer for processing inner holes of the utility model has an angle a between the bottom hole deburring blade and the horizontal center axis of 20°, an angle b between the first inner hole forming blade and the horizontal center axis of 60°, an angle c between the anti-collapse blade and the horizontal center axis of 45°, the inner hole side blade 214 is horizontally arranged, an angle d between the second inner hole forming blade and the horizontal center axis of 45°, and an angle e between the hole mouth burr pressing blade and the horizontal center axis of 80°. The precise design of the bottom hole deburring blade 211, the first inner hole forming blade 212, the anti-collapse blade 213, the inner hole side blade 214, the second inner hole forming blade 215, and the hole mouth burr pressing blade 216 ensures the accuracy of the forming contour and improves the processing quality.

[0038] Further, such as Figure 5 As shown, by placing the outlet of the double straight inner cooling hole 5 as close as possible to the cutting edge 21 of the blade 2, iron chips can be easily taken away by direct spraying, which has a good chip removal effect and helps to improve the product qualification rate and product quality.

[0039] In summary, the internal cold forming reamer for processing inner holes designed by the utility model not only improves the durability and processing quality of the tool, but also improves the cooling effect and chip removal efficiency through structural optimization and improvement of the cooling system, thereby solving the problems of tip cracking and poor cooling effect of the internal cold forming reamer in the prior art. This design has the advantages of reasonable structure, long service life, high processing accuracy and good cooling effect, and can meet the needs of high-efficiency and high-quality inner hole processing.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. An internal cold forming reamer for processing inner holes, characterized in that: include: handle (1); A blade portion (2), wherein the blade portion (2) and the handle portion (1) are integrally formed; the blade tip (21) of the blade portion (2) is provided with, from front to back, a hole bottom deburring blade (211), a first inner hole forming blade (212), an anti-collapse blade (213), an inner hole side blade (214), a second inner hole forming blade (215), and a hole mouth deburring blade (216); A first chip removal groove (3); A second chip removal groove (4), wherein the first chip removal groove (3) and the second chip removal groove (4) are arranged from the end to the tail of the blade (2) on both sides of the blade (2); Double straight inner cooling holes (5), the inner part of the shank (1) is symmetrically provided with double straight inner cooling holes (5) penetrating the first chip removal groove (3) and the second chip removal groove (4) along the central axis.

2. The internal cold forming reamer for processing inner holes according to claim 1, characterized in that: The angle formed between the hole bottom deburring blade (211) and the horizontal central axis is 20°.

3. The internal cold forming reamer for processing inner holes according to claim 1, characterized in that: The angle formed between the inner hole forming edge 1 (212) and the horizontal central axis is 60°.

4. The internal cold forming reamer for processing inner holes according to claim 1, characterized in that: The angle formed between the anti-collapse edge (213) and the horizontal central axis is 45°.

5. The internal cold forming reamer for processing inner holes according to claim 1, characterized in that: The inner hole side blade (214) is arranged horizontally.

6. The internal cold forming reamer for machining inner holes according to claim 1, characterized in that: The angle formed between the second inner hole forming blade (215) and the horizontal central axis is 45°.

7. The internal cold forming reamer for processing inner holes according to claim 1, characterized in that: The angle formed between the orifice burr pressing blade (216) and the horizontal central axis is 80°.

8. The internal cold forming reamer for machining inner holes according to claim 1, characterized in that: The outlets of the double straight inner cooling holes (5) are close to the cutting edge (2).

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