CN210231650U - Inner hole machining tool - Google Patents

Abstract

The utility model relates to an inner hole machining tool, including cutter arbor, drill bit and cutting edge, the one end of cutter arbor is the drill bit, be provided with the crossing cutting edge in two or more top on the drill bit, two or more the length of cutting edge is according to cutter arbor direction of rotation order degressive 0.5-3mm in proper order. The utility model is mainly used for improving and adjusting the structures of the drill bit and the cutting edge at the end part of the cutting tool, thereby improving the drilling speed and the processing quality; carry out the shock attenuation to the cutter through setting up shock attenuation sleeve pipe, improve the stability of cutter operation, prolong its life, further improve the processingquality of work piece, simple structure realizes easily that low in manufacturing cost, the hole processing cutter that the practicality is high.

Description

Inner hole machining tool

Technical Field

The utility model relates to a cutter especially relates to a hole processing cutter.

Background

In any machine, no hole is formed, and the hole is needed for connecting and fixing the parts, so that the hole is widely applied to metal parts. In the machining in the prior art, the fine hole or deep hole machining is always a difficult point in the machining industry. Firstly, at the drilling in-process, cutter cutting part deepens the work piece completely and forms closed region with the work piece, and the smear metal curls the difficulty and is difficult for discharging, and drilling efficiency is not high, owing to be continuous processing, can produce a large amount of cutting heat in addition, is difficult to derive influence cutter life. Secondly, the cutter bar of the used cutter is too long due to the undersize of the aperture or the deeper depth of the aperture, and the processing vibration is easily generated during the operation, thereby affecting the drilling quality.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a drilling is steady quick, the processingquality is good, simple structure, low in manufacturing cost, the hole processing cutter that the practicality is high.

In order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:

the utility model provides an inner hole machining tool, includes cutter arbor, drill bit and cutting edge, the one end of cutter arbor is the drill bit, be provided with the crossing cutting edge in two or more top on the drill bit, two or more the length of cutting edge is according to cutter arbor direction of rotation order degressive 0.5-3mm in proper order.

Further, the cutting edge is equipped with second main cutting edge and first main cutting edge along direction of rotation in proper order, the length of first main cutting edge is 1mm less than the length of second main cutting edge.

Furthermore, at least two chip flutes are arranged on the cutter rod and are spirally arranged along the axial direction of the cutter rod, and the spiral angle is 45 degrees.

Further, a cooling channel for cooling water to pass through is arranged in the cutter bar, and the cooling channel is communicated with a cooling hole arranged on the drill bit.

Furthermore, the cutter arbor overcoat is equipped with the shock attenuation sleeve pipe, the shock attenuation sleeve pipe is cast iron shock attenuation alloy pipe.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model improves and adjusts the structure of the drill bit and the cutting edge at the end part of the cutting tool, thereby improving the drilling speed and the processing quality; the tool is damped by arranging the damping sleeve, the stability of the operation of the tool is improved, the service life of the tool is prolonged, the processing quality of a workpiece is further improved, the structure is simple, the tool is easy to realize, the manufacturing cost is low, and the practicability is high.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a projection of the drill bit of the present invention on a cross section of the cutter bar;

wherein, 1, a cutter bar; 2. a drill bit; 3. a blade; 31. a first main blade; 32. a first minor blade; 33. a second main blade; 34. a second minor cutting edge; 4. a chip pocket; 5. a cooling channel; 6. a shock-absorbing sleeve; 7. a shock-absorbing ring; 8. a guide bar; 9. and cooling the holes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

It should be noted that, in the description of the technical solutions of the present invention, some directional words, such as "front", "rear", "upper", "lower", "top", "bottom", "inner", "outer", etc., used for clearly describing the technical features of the present invention are all in terms of the orientation of the drawings of the present invention.

Examples

As shown in fig. 1 and 2, the inner hole machining tool of the present embodiment includes a tool bar 1, a drill 2 and cutting edges 3, wherein one end of the tool bar 1 is the drill 2, two or more cutting edges 3 with intersecting top ends are arranged on the drill 2, and the lengths of the two or more cutting edges 3 are sequentially decreased by 0.5-3mm in the sequence of the rotation direction of the tool bar 1. In this embodiment, the cutting edge 3 is provided with the second main cutting edge 33 and the first main cutting edge 31 in sequence along the rotating direction, the length of the first main cutting edge 31 is 1mm less than that of the second main cutting edge 33, and the cutting edges of the first main cutting edge 31 and the second main cutting edge 33 are inclined by 15-30 degrees along the rotating direction of the cutter, at the moment, the cutter has a circulating and progressive process during drilling, and the cutting edges are inclined to enable the cutting to be faster and more labor-saving, so that the vibration is reduced, the operation is more stable, the efficiency is higher, and the damage to the cutting edges is also small. The first main blade 31 is also provided with a first sub-blade 32, and the second main blade 33 is also provided with a second sub-blade 34. The cutter bar 1 is provided with at least two chip flutes 4, the chip flutes 4 are spirally arranged along the axial direction of the cutter bar 1, and the helical angle is 45 degrees. In the present embodiment, two chip flutes 4 are provided, and the starting ends are respectively located between the first minor cutting edge 32 and the second major cutting edge 33, and between the second minor cutting edge 34 and the first major cutting edge 31. In this embodiment, an included angle between the first main blade 31 and the first auxiliary blade 32 is 70 degrees, an included angle between the first auxiliary blade 32 and the second main blade 33 is 120 degrees, an included angle between the second main blade 33 and the second auxiliary blade 34 is 90 degrees, and an included angle between the second auxiliary blade 34 and the first main blade 31 is 80 degrees.

In the embodiment, two cooling holes 9 are symmetrically arranged on the drill bit 2, a cooling channel 5 for cooling water to pass through is arranged in the cutter bar 1, and the cooling channel 5 is communicated with the cooling holes 9 arranged on the drill bit 2. Through relevant experiments and practices, the centers of the cooling holes 9 are respectively positioned on the angular bisector of the first main blade 31 and the first auxiliary blade 32 and the angular bisector of the second main blade 33 and the second auxiliary blade 34, and when the distances from the centers of the cooling holes 9 to the top end of the blade 3 are 3/5 from the first main blade 31 and the second main blade 33 to the top end of the blade 3, the fast and effective cooling of the drill bit 2 and the workpiece can be realized without affecting the strength of the drill bit 2, the cooling effect is better, and the processing quality of the holes and the service life of the cutter can be improved. In addition, the one end that this embodiment kept away from drill bit 2 on cutter arbor 1 is provided with annular damping ring 7, and damping ring 7 can link firmly with the blade holder of fixed cutter arbor 1, is provided with the sealing washer between damping ring 7 and the 1 outer wall of cutter arbor and is used for preventing that the cooling water from overflowing. 2-4 guide rods 8 are arranged on the inner side of the damping ring 7, and the end parts of the guide rods 8 penetrate through the rear part of the side wall of the cutter bar 1 and extend into the cooling channel 5; as the conduction speeds of the liquid and the solid to the vibration are different, the damping ring 7 receives the vibration of different frequencies transmitted by the water and the cutter bar 1 through the guide rod 8 and carries out vibration frequency interference on the vibration, so that the vibration frequency is gradually attenuated or dispersed, and the aim of damping is fulfilled.

In this embodiment, 1 overcoat of cutter arbor is equipped with shock attenuation sleeve 6, and shock attenuation sleeve 6 can adopt welding, joint or threaded connection mode to fix in the cutter arbor 1 outside, also can be connected with the fixing base of fixed cutter arbor 1 blade holder by one end and the other end plays the guide rail effect with 1 sliding connection of cutter arbor to cutter arbor 1. The shock-absorbing sleeve 6 has better shock-absorbing effect when the length of the shock-absorbing sleeve is 1/3-1/2 of the length of the whole cutter bar 1. The damping sleeve 6 is a cast iron damping alloy pipe, the cast iron damping alloy pipe is adopted, graphite exists in cast iron, the graphite undergoes repeated plastic deformation under the action of vibration energy, the vibration energy is converted into frictional heat to be consumed through the process, the damping coefficient of the vibration is 6-10 times that of steel, the damping capacity is high, the structure is simple, and the realization is easy.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.

Claims (5)

1. An inner hole machining tool is characterized in that: the special tool comprises a tool bar (1), a drill bit (2) and cutting edges (3), wherein the drill bit (2) is arranged at one end of the tool bar (1), two or more cutting edges (3) with intersecting top ends are arranged on the drill bit (2), and the lengths of the two or more cutting edges (3) are sequentially decreased by 0.5-3mm in sequence according to the rotation direction of the tool bar (1).

2. The bore machining tool of claim 1, wherein: the cutting edge (3) is equipped with second main cutting edge (33) and first main cutting edge (31) along direction of rotation in proper order, the length of first main cutting edge (31) is 1mm less than the length of second main cutting edge (33).

3. The bore machining tool of claim 2, wherein: the cutter bar (1) is provided with at least two chip flutes (4), the chip flutes (4) are spirally arranged along the axial direction of the cutter bar (1), and the helical angle is 45 degrees.

4. The bore machining tool of claim 3, wherein: a cooling channel (5) for cooling water to pass through is arranged in the cutter bar (1), and the cooling channel (5) is communicated with a cooling hole (9) arranged on the drill bit (2).

5. The bore machining tool of claim 4, wherein: the tool bar (1) is sleeved with a damping sleeve (6), and the damping sleeve (6) is a cast iron damping alloy pipe.

Images