Circulating cooling type forming reamer

Abstract

The utility model belongs to the technical field of reamers, and particularly relates to a circulating cooling type forming reamer which comprises a reamer handle portion and a reamer edge portion on the two sides of the reamer, a cooling hole penetrating through the axis of the reamer handle portion and the axis of the reamer edge portion is formed in the reamer, and a plurality of straight blades at the ends and spiral blades with side arc faces are arranged on the reamer edge portion respectively. Straight blade valleys are formed between the straight blades, the straight blade valleys are connected with the cooling holes, spiral blade valleys are formed between the spiral blades, and the spiral blade valleys are connected with the straight blade valleys in a one-to-one correspondence mode. The straight blade valleys on the end face of the blade part of the reamer and the spiral blade valleys on the side face of the blade part of the reamer are connected with the cooling holes to form a channel allowing cooling liquid to flow, so that the cooling liquid can make more sufficient contact with the blade part from the outside of the inner reamer to take away heat, waste chips generated by drilling and reaming are taken away in the flowing process, the working environment of the reamer is guaranteed, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of reamers, and particularly relates to a circulating cooling type forming reamer. Background Art

[0002] A reamer is a rotary tool with one or more cutting teeth for removing a thin layer of metal from the surface of a machined hole. The reamer is a rotary finishing tool with a straight edge or a spiral edge, used for enlarging or reaming a hole. A reamer has one or more cutting teeth and is a rotary tool for removing a thin layer of metal from the machined surface of a hole. After being machined by a reamer, the hole can obtain precise dimensions and shapes. A reamer is used for reaming a hole that has been drilled (or enlarged) on a workpiece, mainly to improve the machining accuracy of the hole, reduce its surface roughness, and is a tool suitable for the finishing and semi-finishing of holes. The machining allowance is generally very small.

[0003] An internally cooled straight flute drill reamer disclosed in Patent CN212094509U includes a reamer clamping handle. The front end of the reamer clamping handle is set as a reamer part. A plurality of reamer support flank faces are symmetrically arranged up and down on both side faces of the reamer part. A reamer chip removal groove is formed between two adjacent faces of the reamer support flank faces, and there are two symmetrically arranged reamer chip removal grooves. The inside of the reamer chip removal groove is evenly provided with reamer internal cooling outlets. The reamer part and the reamer clamping handle are provided with a reamer internal cooling through groove in a penetrating manner. The front end face of the reamer part is provided with a reamer head face. When the utility model is used, the surface of the reamer support flank face arranged on the reamer part is provided with a DLC coating, which can reduce the surface friction coefficient of the reamer support flank face, improve the wear resistance, and at the same time increase the hardness of the entire reamer support flank body, greatly improving the service life of the internally cooled straight flute drill reamer and reducing the customer's procurement cost.

[0004] In the above solution, an internal cooling through groove is opened in the tool body and internal cooling outlets communicating with it are also opened on the cutting edge surface. However, as an integrally formed reamer, during the hole opening stage, a large amount of heat and waste chips will be generated at the end, and flowing coolant is required to reduce the temperature and clean the waste chips. In this solution, the internal cooling through groove cannot form the flow of coolant at the end, not only reducing the cooling effect but also the waste chips may block the internal cooling through groove. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the above problems and provide a circulating cooling type forming reamer that can solve the above technical problems.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The circulating cooling type forming reamer includes shank parts and cutting edge parts on both sides of the reamer. A cooling hole is provided in the reamer and penetrates through the axes of the shank parts and the cutting edge parts. A plurality of straight edges at the ends and spiral edges with side arc surfaces are respectively arranged on the cutting edge parts. Straight edge valleys are arranged between the straight edges, and all the straight edge valleys are connected to the cooling hole. Spiral edge valleys are arranged between the spiral edges, and the spiral edge valleys are connected to the straight edge valleys in one-to-one correspondence.

[0008] In the circulating cooling type forming reamer, the straight edge includes a straight edge peak and a straight edge back. The straight edge valleys are respectively connected to the straight edge peak and the straight edge back in the two adjacent straight edges, and the straight edge peaks are radially distributed around the cooling hole.

[0009] In the circulating cooling type forming reamer, adjacent two straight edge peaks form a straight edge angle, and different angle values exist between adjacent straight edge angles. The angle values between two symmetric straight edge angles are the same.

[0010] In the circulating cooling type forming reamer, the straight edge back includes a continuous first edge back surface and a second edge back surface. The first edge back surface is connected to the straight edge peak, the second edge back surface is connected to the straight edge valley, and an inclined angle is provided at one end of the first edge back surface far away from the cooling hole.

[0011] In the circulating cooling type forming reamer, the spiral edge includes a spiral edge back and a spiral edge peak. The spiral edge peak is connected to the spiral edge valley, and the spiral edge back is connected to another adjacent spiral edge valley.

[0012] In the circulating cooling type forming reamer, one end of the spiral edge back is connected to the first edge back surface through the transition of the inclined angle, and the other end of the spiral edge back extends spirally towards the shank part.

[0013] In the circulating cooling type forming reamer, a reinforcing ring is arranged at one end of the cutting edge part close to the shank part, and the spiral edge extends to the outer arc surface of the reinforcing ring.

[0014] In the circulating cooling type forming reamer, an inclined surface is arranged on the end surface of the reinforcing ring to connect the spiral edge valley with the outer arc surface of the reinforcing ring.

[0015] In the circulating cooling type forming reamer, a cooling gap is provided between one end of the spiral edge far away from the straight edge and the shank part, and the spiral edge valley is communicated with the cooling gap.

[0016] In the circulating cooling type forming reamer, a coolant inlet interface is arranged at the port of the cooling hole in the shank part.

[0017] The advantages of the present utility model are as follows:

[0018] Connect the straight-edge valley on the end face of the reamer blade part and the spiral-edge valley on the side face with the cooling holes to form a channel for the coolant to flow, so that the coolant can contact the blade part more fully from the inside of the tool to the outside to take away heat, and carry away the chips generated during drilling and reaming during the flow, ensuring the working environment of the reamer and improving the processing efficiency. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0020] Figure 2 It is a schematic diagram of the straight-edge structure of the present utility model.

[0021] Figure 3 It is a schematic diagram of the spiral-edge structure of the present utility model.

[0022] Figure 4 It is a schematic diagram of the reinforcing ring structure of the present utility model.

[0023] In the illustration, cooling hole 1, straight edge 2, straight-edge valley 21, straight-edge peak 22, straight-edge back 23, bevel angle 24, spiral edge 3, spiral-edge valley 31, spiral-edge back 32, spiral-edge peak 33, reinforcing ring 4. Detailed Description of the Invention

[0024] The following are specific embodiments of the utility model and in conjunction with the drawings, the technical solutions of the present utility model are further described, but the present utility model is not limited to these embodiments.

[0025] As Figures 1 - 4 shown, a circulating cooling type forming reamer includes a shank part and a blade part on both sides of the reamer. A cooling hole 1 is provided in the reamer through the axes of the shank part and the blade part. A plurality of straight edges 2 at the ends and spiral edges 3 on the side arc surfaces are respectively arranged on the blade part. Straight-edge valleys 21 are provided between the straight edges 2, and all the straight-edge valleys 21 are connected to the cooling hole 1. Spiral-edge valleys 31 are provided between the spiral edges 3, and the spiral-edge valleys 31 are connected to the straight-edge valleys 21 in one-to-one correspondence.

[0026] That is, since the forming reamer needs to continuously complete the tasks of drilling and reaming, the requirements for the cooling of the reamer and the discharge of impurities are higher than those of tool-changing machining. Therefore, the straight-edge valley 21 on the end face of the reamer blade part and the spiral-edge valley 31 on the side face are connected with the cooling hole 1 to form a channel for the coolant to flow, so that the coolant can contact the blade part more fully from the inside of the tool to the outside to take away heat, and carry away the chips generated during drilling and reaming during the flow, ensuring the working environment of the reamer and improving the processing efficiency.

[0027] In this embodiment, the straight edge 2 includes a straight-edge peak 22 and a straight-edge back 23. The straight-edge valleys 21 are respectively connected to the straight-edge peak 22 and the straight-edge back 23 in the two straight edges 2 on both sides, and the straight-edge peaks 22 are radially distributed around the cooling hole 1.

[0028] The straight blades 2 are radially annularly distributed centered on the cooling hole 1. The raised straight blade peaks 22 are responsible for directly contacting the material during hole opening for planing. The straight blade backs 23 form a certain inclination angle with the end face of the reamer, enabling the straight blade peaks 22 to have greater pressure. At the same time, a gap is left with the material surface to allow more coolant to contact the straight blade peaks 22 to take away most of the heat.

[0029] In this embodiment, adjacent straight blade peaks 22 form straight blade angles, and there are different angle values between adjacent straight blade angles. The angle values between two symmetric straight blade angles are the same.

[0030] The straight blade peaks 22 are not circumferentially uniformly distributed, and the straight blade angles will have slight variations. This can cause different pressures to be generated on the straight blade peaks 22 to form the main planing pressure points, avoiding the inability to effectively generate a cutting point under uniform pressure sharing and thus enhancing the hole opening efficiency. However, the two opposite angles have the same degree, that is, the pressure points are in symmetric positions on both sides, ensuring the axial balance during drilling.

[0031] As shown in the figure, six straight blades 2 are provided on the end face, and a total of three angles are set and arranged in the order of 58°, 62°, and 60°.

[0032] In this embodiment, the straight blade back 23 includes a continuous first blade back surface and a second blade back surface. The first blade back surface is connected to the straight blade peak 22, and the second blade back surface is connected to the straight blade valley 21. An inclined angle 24 is provided at one end of the first blade back surface away from the cooling hole 1.

[0033] The two parts of the straight blade back 23 can not only endow the straight blade peak 22 with a better mechanical structure but also increase the area of the straight blade 2 to contact the coolant for cooling. Among them, providing the inclined angle 24 at the outer edge of the first blade back surface can make the diameter of the coverage area of the straight blade peak 22 slightly smaller than the diameter of the spiral blade 3, preventing the straight blade 2 from getting stuck on the outside and damaging the tool during hole opening.

[0034] In this embodiment, the spiral blade 3 includes a spiral blade back 32 and a spiral blade peak 33. The spiral blade peak 33 is connected to the spiral blade valley 31, and the spiral blade back 32 is connected to another adjacent spiral blade valley 31.

[0035] The spiral blade back 32 is an arc surface, which can smoothly transition with the inner wall of the hole, avoiding unnecessary friction with the inner wall of the hole.

[0036] In this embodiment, one end of the spiral blade back 32 is connected to the first blade back surface through the inclined angle 24, and the other end of the spiral blade back 32 spirally extends towards the tool shank.

[0037] The spiral blade 3 is an extension of the straight blade 2 on the arc surface, so the span between the blades is also different. Similar to the straight blade 2, the uneven distribution causes the forces on each spiral blade 3 during reaming to have a focus, which is more conducive to generating a cutting point on the hole wall.

[0038] In this embodiment, a reinforcing ring 4 is provided at one end of the blade portion close to the handle portion, and the spiral blade 3 extends to the outer arc surface of the reinforcing ring 4.

[0039] By providing the reinforcing ring 4 on the side of the blade portion close to the handle, the axial connection area between the blade portion and the handle portion is increased to improve the torsional strength of the blade portion during reaming.

[0040] Among them, the diameter of the reinforcing ring 4 is smaller than the diameter of the blade peak of the spiral blade 3, so that the spiral blade 3 can continue towards the handle portion.

[0041] In this embodiment, an inclined surface is provided on the end surface of the reinforcing ring 4 to connect the spiral blade valley 31 with the outer arc surface of the reinforcing ring 4.

[0042] Coolant is injected from the inside of the reamer and discharged along the spiral blade valley 31 from the end. If the injection pressure of the coolant is relatively large, it will spout towards the handle portion, that is, it will contaminate the mounting seat of the reamer. Therefore, an inclined surface is provided between the reinforcing ring 4 and the spiral blade valley 31 for transition, and the spouted coolant diffuses outward under the guidance of the inclined surface, avoiding direct splashing on the tool holder.

[0043] In this embodiment, a cooling gap is provided between the end of the spiral blade 3 far from the straight blade 2 and the handle portion, and the spiral blade valley 31 is communicated with the cooling gap.

[0044] When the blade portion completely extends into the cavity, the handle portion will greatly block the cooling water discharged from the spiral blade valley 31. Therefore, the spiral blade 3 is not completely extended to contact the handle portion, and a cooling gap is left between them to allow the coolant to be discharged smoothly from the gap.

[0045] In this embodiment, the cooling hole 1 is provided with a coolant inlet interface at the port of the handle portion, and the coolant is injected from the inlet interface.

[0046] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. The circulating cooling type forming reamer comprises shank parts and cutting edge parts on both sides of the reamer, and a cooling hole (1) penetrating through the axes of the shank parts and the cutting edge parts is formed in the reamer. It is characterized in that, A plurality of straight blades (2) at the ends and helical blades (3) with side arc surfaces are respectively arranged on the blade part. Straight blade valleys (21) are formed between the straight blades (2), and all the straight blade valleys (21) are connected to the cooling holes (1). Helical blade valleys (31) are formed between the helical blades (3), and the helical blade valleys (31) are connected to the straight blade valleys (21) in a one-to-one correspondence.

2. The circulating cooling type forming reamer according to claim 1, wherein The straight blade (2) includes a straight blade peak (22) and a straight blade back (23). The straight blade valleys (21) are respectively connected to the straight blade peaks (22) and straight blade backs (23) in the two adjacent straight blades (2). The straight blade peaks (22) are radially distributed around the cooling hole (1).

3. The circulating cooling type forming reamer according to claim 2, wherein Adjacent two straight blade peaks (22) form a straight blade angle, and different angle values exist between adjacent straight blade angles. The angle values between two symmetric straight blade angles are the same.

4. The circulating cooling type forming reamer according to claim 2, characterized in that, The straight blade back (23) includes a continuous first blade back surface and a second blade back surface. The first blade back surface is connected to the straight blade peak (22), and the second blade back surface is connected to the straight blade valley (21). An oblique angle (24) is formed at one end of the first blade back surface away from the cooling hole (1).

5. The circulating cooling type forming reamer according to claim 4, wherein The helical blade (3) includes a helical blade back (32) and a helical blade peak (33). The helical blade peak (33) is connected to the helical blade valley (31), and the helical blade back (32) is connected to another adjacent helical blade valley (31).

6. The circulating cooling type forming reamer according to claim 5, characterized in that, One end of the helical blade back (32) is connected to the first blade back surface through the transition of the oblique angle (24), and the other end of the helical blade back (32) extends spirally towards the handle part.

7. The circulating cooling type forming reamer according to claim 1, wherein A reinforcing ring (4) is arranged at one end of the blade part close to the handle part, and the helical blade (3) extends to the outer arc surface of the reinforcing ring (4).

8. The circulating cooling type forming reamer according to claim 7, wherein An inclined surface is arranged on the end surface of the reinforcing ring (4) to connect the helical blade valley (31) with the outer arc surface of the reinforcing ring (4).

9. The circulating cooling type forming reamer according to claim 8, characterized in that, A cooling gap is arranged between one end of the helical blade (3) far from the straight blade (2) and the handle part, and the helical blade valley (31) is communicated with the cooling gap.

10. The circulating cooling type forming reamer according to claim 1, wherein, A coolant inlet interface is arranged at the port of the cooling hole (1) on the handle part.

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