Claw-shaped elastic guide deep hole broaching and boring cutter

Abstract

The utility model discloses a claw-shaped elastic guide deep hole broaching and boring cutter which comprises a cutter body and a blade, and the blade is fixed on the outer wall of the cutter body. A guide key is further arranged on the outer wall of the cutter body, a mandrel is arranged at the axis of the cutter body and penetrates through a claw-shaped elastic guide sleeve, the end of the mandrel is fixed to the cutter body, and the claw-shaped elastic guide sleeve is directly or indirectly fixed to the outer diameter of the cutter body. The claw-shaped elastic guide sleeve is of a rotary body structure and comprises a barrel and an elastic claw end, a plurality of elastic claws are evenly distributed on the elastic claw end, and gaps are formed between the elastic claws. During working, the cutter body enters an inner hole blank surface, and is attached to the inner diameter trend of the original inner hole blank surface for cutting by virtue of the deformation of the claw-shaped elastic guide sleeve, so that the wall thickness of a processed pipe is uniform.

Description

TECHNICAL FIELD

[0001] The utility model relates to deep hole broaching cutting processing technical field, specifically disclose a kind of claw type elastic guiding deep hole broaching cutter, it can guarantee the uniformity of wall thickness after processing, it is used on slender pipe fitting. BACKGROUND

[0002] In the existing deep hole broaching processing, the structure of general broaching tool is: a rough boring cutter is provided with a hard alloy guide key, a soft guide strip is arranged at the rear side of the hard alloy guide key, and the soft guide strip is usually made of nylon or cloth rubber.

[0003] When the above deep hole broaching is used for processing, the cutter body is supported and damped by the inner hole when the cutter enters the inner hole for cutting operation, and the operation advantage is that the inner hole straightness is high and the deflection is small after processing, but for some processing conditions, the inner hole straightness and small deflection will affect the wall thickness, for example: in the pipeline of petrochemical and nuclear power industries, the slender pipe is usually made by centrifugal casting, in order to ensure the stability of the medium pressure in the pipeline, the uniformity of the wall thickness of the pipeline is required. However, when the length of the slender pipe is large, it is easy to bend, so if the rough boring cutter in the prior art is used for processing, the straightness will affect the uniformity of the wall thickness.

[0004] In view of the above-mentioned disadvantages, as a technical personnel in this industry, it is necessary to design an elastic guiding deep hole broaching cutter with automatic adjustment function, which can be adjusted during processing to avoid affecting the uniformity of the wall thickness during rough boring processing. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the utility model provides a claw type elastic guiding deep hole broaching cutter, which is fixed by setting an elastic claw, and the cutter body is fixed by the elastic claw. When deep hole processing is carried out, the elastic claw is attached to the inside of the pipeline, and the bending degree of the pipeline is compensated by the deformation amount, so as to avoid uneven wall thickness of the pipeline after processing.

[0006] In order to achieve the above technical purpose, the utility model adopts the following scheme: a claw type elastic guiding deep hole broaching cutter, which comprises a cutter body and a blade, the blade is fixed on the outer wall of the cutter body, the outer wall of the cutter body is also provided with a guide key, the cutter body is provided with a stepped hole at the center, the stepped hole is fixed with a mandrel, the mandrel penetrates the claw type elastic guiding sleeve and is fixed at the end of the cutter body, the claw type elastic guiding sleeve is directly or indirectly fixed on the outer diameter of the cutter body, the claw type elastic guiding sleeve is a rotary body structure, which comprises a cylinder and a elastic claw end, the elastic claw end is uniformly distributed with a plurality of elastic claws, and the elastic claws are provided with gaps.

[0007] The knife body is provided with a material returning groove, and the material returning groove is arranged at the end of the blade.

[0008] The guide pin comprises a main guide pin and a secondary guide pin, and the main guide pin and the secondary guide pin are made of nylon.

[0009] The length of the main guide pin is greater than that of the secondary guide pin.

[0010] The end of the knife body is provided with a wear-resistant sleeve, the wear-resistant sleeve is fixed on the periphery of the mandrel, the claw-shaped elastic guide sleeve is arranged on the wear-resistant sleeve, and the elastic claws of the claw-shaped elastic guide sleeve clasp the mandrel.

[0011] The utility model discloses a beneficial effect is: the utility model discloses a knife body and blade through above setting, and the blade is fixed on the outer wall of knife body, still be provided with guide pin on the outer wall of knife body, and the mandrel is arranged at the axle center, and the mandrel is through claw -shaped elastic guide sleeve and end fixed on the knife body, and claw -shaped elastic guide sleeve is directly or indirectly fixed on the outer diameter of knife body, and claw -shaped elastic guide sleeve is the structure of gyre, and it includes cylinder and elastic claw end, and evenly distribute a plurality of elastic claws on elastic claw end, and set up the gap between elastic claw, when working, the knife body enters the hole blank surface, and the deformation of claw -shaped elastic guide sleeve is adhered to the inner diameter trend cutting of hole original hole blank surface, guarantees the wall thickness even of pipe material processing. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the front view structure schematic diagram of the utility model;

[0013] Figure 2 It is claw -shaped elastic guide sleeve solid structure schematic diagram;

[0014] In the drawings, 1, knife body, 11, stepped hole, 2, locking bolt, 3, main guide pin, 31, countersunk screw, 4, secondary guide pin, 5, blade, 51, material returning groove, 6, wear-resistant sleeve, 7, claw-shaped elastic guide sleeve, 71, cylinder, 72, elastic claw, 73, threaded hole, 74, gap, 8, locking screw, 9, mandrel. DETAILED DESCRIPTION

[0015] As shown in the drawings, the utility model discloses a claw -shaped elastic guide deep hole broaching and boring cutter, and the specific structure of the claw -shaped elastic guide deep hole broaching and boring cutter is shown in detail, and the use method is explained through specific embodiment, and the technical personnel in the field can implement the technical scheme or make technical extension on the basis of the technical scheme, and the protection scope of the utility model is as the claim is recorded accurately.

[0016] Embodiment 1:

[0017] The claw type elastic guiding deep hole broach cutter comprises a cutter body 1 and a cutter blade 5, the cutter blade 5 is fixed on the outer wall of the cutter body 1, the included angle between the cutter blade 5 and the axis is 5 degrees when the cutter blade 5 is fixed, the cutter body 1 is provided with a material discharging groove 51, and the material discharging groove 51 is arranged at the end of the cutter blade 5, so that the cutting and discharging of the material are facilitated.

[0018] The outer wall of the cutter body 1 is further provided with three rows of guiding keys, the guiding keys comprise main guiding keys 3 and auxiliary guiding keys 4, the main guiding keys 3 are arranged on the front side and are made of nylon material, and the auxiliary guiding keys 4 are arranged on the rear side and are made of wear-resistant nylon material. Since the main guiding keys 3 are on the same axial plane as the cutter blade 5, the length of the main guiding keys 3 is greater than that of the auxiliary guiding keys 4 and the guiding support strength of the main guiding keys 3 is greater, so the length of the main guiding keys 3 is greater than that of the auxiliary guiding keys 4 when the main guiding keys 3 and the auxiliary guiding keys 4 are arranged.

[0019] The axis of the cutter body 1 is provided with a stepped hole 11, a mandrel 9 is fixed in the stepped hole 11, the mandrel 9 penetrates through a claw type elastic guiding sleeve 7 and the end of the mandrel 9 is fixed on the cutter body 1 through a locking bolt 2, and the claw type elastic guiding sleeve 7 is fixed on the outer diameter of the cutter body 1.

[0020] As shown in the figure, Figure 2 The claw type elastic guiding sleeve 7 is a rotary body structure, comprises a cylinder body 71 and a spring claw end, a plurality of spring claws 72 are uniformly distributed on the spring claw end, generally, the spring claws 72 are four or six, gaps 71 are arranged between the spring claws 72, threaded holes 73 are arranged on the cylinder body 71, the claw type elastic guiding sleeve 7 and the mandrel 9 or the cutter body 1 are fixed through cooperation of the locking screw 8 and the threaded holes 73, the outer diameter of the claw type elastic guiding sleeve 7 is 1mm larger than the machining outer diameter of the cutter blade 5, the overall material of the claw type elastic guiding sleeve 7 is selected from 65Mn, and the above structure can produce slight deformation when any point on the 360 degree circumference is subjected to pressure.

[0021] In the embodiment, the claw type elastic guiding sleeve 7 can be directly fixed on the mandrel 9 or the cutter body 1, when machining, the cutter body 1 enters the inner hole blank surface, and the cutter blade 5 cuts along the inner diameter of the inner hole original blank surface by virtue of the deformation of the spring claws 72 on the claw type elastic guiding sleeve 7, so that the wall thickness of the pipe after machining is uniform.

[0022] Embodiment 2:

[0023] On the basis of the structure of the embodiment 1, during the machining process, the claw type elastic guide sleeve 7 will rotate synchronously with the mandrel 9 or the cutter body 1, and such rotation will cause the elastic claw 72 to grind the inner wall of the pipeline, and even affect the machining quality of the inner wall of the pipeline. In order to improve the above machining structure, the wear-resistant sleeve 6 is arranged at the end of the cutter body 1, the wear-resistant sleeve 6 is fixed on the periphery of the mandrel 9, the claw type elastic guide sleeve 7 is surrounded on the wear-resistant sleeve 6, and the elastic claw 72 of the claw type elastic guide sleeve 7 clamps the mandrel 9. The wear-resistant sleeve 6 is made of brass.

[0024] In the machining state, when the cutter body 1 enters the inner hole blank surface, the basic trend of the inner hole original blank surface is cut by virtue of the deformation of the claw type elastic guide sleeve 7, so that the wall thickness of the pipe after machining is uniform; in addition, the three blades 5 with the inclined angle can also improve the machining efficiency and the service life.

[0025] In conclusion, the cutter body 1 is fixed by the elastic claw, the elastic claw can be attached to the inside of the pipeline, and the bending degree of the pipeline can be compensated by the deformation amount, so that the wall thickness of the pipeline after machining is uniform, the defects in the prior art are overcome, and the claw type elastic guide deep hole broaching cutter is ideal.

Claims

1. A claw-type elastic guide deep hole boring tool, characterized by: It includes a knife body and a blade, and the blade is fixed on the outer wall of the knife body; a guide key is also provided on the outer wall of the knife body, and a stepped hole is provided at the axis of the knife body, and a core shaft is fixed in the stepped hole. The core shaft passes through a claw-shaped elastic guide sleeve and the end is fixed on the knife body, and the claw-shaped elastic guide sleeve is directly or indirectly fixed on the outer diameter of the knife body; the claw-shaped elastic guide sleeve is a rotating body structure, which includes a cylinder and a claw end, and a plurality of elastic claws are evenly distributed on the claw end, and gaps are provided between the elastic claws.

2. A claw-type elastically guided deep hole boring tool according to claim 1, characterized in that: The cutter body is provided with a material withdrawal groove, and the material withdrawal groove is arranged at the end of the blade.

3. A claw-type elastically guided deep hole boring tool according to claim 1, characterized in that: The guide key comprises a main guide key and an auxiliary guide key, and the main guide key and the auxiliary guide key are made of nylon.

4. A claw-type elastically guided deep hole boring tool as claimed in claim 3, characterized in that: The main guide key is longer than the auxiliary guide key.

5. The claw-type elastic guide deep hole boring tool according to claim 1, characterized in that: The end of the cutter body is provided with a wear-resistant sleeve, which is fixed on the periphery of the core shaft. The claw-shaped elastic guide sleeve surrounds the wear-resistant sleeve and the elastic claws of the claw-shaped elastic guide sleeve clamp the core shaft.

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