Replaceable small-aperture shock-resistant fine-adjustment boring cutter

Abstract

The utility model discloses a replaceable small-aperture anti-seismic fine-tuning boring cutter which comprises an anti-seismic boring rod and a boring head, the bottom of the boring head is fixedly connected with a limiting shaft with the outer surface arranged to be a conical surface, the bottom of the limiting shaft is fixedly connected with a screw rod, the anti-seismic boring rod is correspondingly provided with a limiting hole and a connecting screw hole, and the limiting shaft is connected with the limiting hole in a fastening fit mode. The screw rod is in threaded connection with the connecting screw hole, a blade seat is arranged on the boring head and connected to the boring head through a fine adjustment device, and a blade is detachably installed on the blade seat. The shock-resistant boring rod and the boring head are fastened and connected into a whole through the conical limiting shaft and the screw, and the lower end face of the boring head and the outer conical surface of the limiting shaft are strongly attached to the upper end face and the inner conical surface of the boring rod through elastic deformation of the limiting shaft of the boring head, so that the contact surface between the boring head and the outer conical surface is increased; the overall rigidity of the tool is improved, meanwhile, jumping of a tool nose of the boring head is reduced, the anti-seismic performance is enhanced, and the anti-seismic performance is better through the anti-seismic boring rod brazed by alloy steel and tungsten steel.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control tools, in particular to a replaceable small-aperture anti-vibration fine-tuning boring tool. Background Art

[0002] A boring tool is a type of hole processing tool, generally with a round shank. It is most commonly used in inner hole processing, hole expansion, profiling, etc.

[0003] When boring deep holes, a longer boring bar is often used. During the cutting process, due to the high-speed rotation of the machine tool spindle, the tool overhang is too long and the rigidity is reduced. In addition, the boring head is subjected to a large centrifugal force, which often causes the tool to vibrate during deep hole boring. This not only reduces the machining accuracy of the workpiece, but also causes tool vibration marks on the surface of the inner hole of the workpiece and reduces the surface roughness. In addition, it also aggravates the wear of the boring blade, which significantly shortens the service life of the blade.

[0004] Therefore, in order to improve the anti-vibration performance of the boring tool, this type of boring tool for processing small-diameter deep holes often adopts an integrated design of boring bar and boring head. However, the boring head and boring bar of the integrated design boring tool cannot be replaced, so it is impossible to process internal holes of different depths by replacing the boring bar. If the boring tool is damaged beyond repair, it can only be scrapped as a whole, and the boring head or boring bar cannot be reused like the split replaceable design boring tool. Therefore, the cost of use is relatively high. Utility Model Content

[0005] In order to solve the above technical problems, the utility model designs a replaceable small-aperture anti-vibration fine-adjustment boring tool.

[0006] The utility model adopts the following technical solutions:

[0007] A replaceable small-aperture anti-vibration fine-tuning boring tool comprises an anti-vibration boring bar and a boring head. A limiting shaft with a conical outer surface is fixedly connected to the bottom of the boring head, a screw is fixedly connected to the bottom of the limiting shaft, a limiting hole and a connecting screw hole are correspondingly arranged on the anti-vibration boring bar, the limiting shaft is tightly fitted and connected to the limiting hole, the screw is threadedly connected to the connecting screw hole, a blade seat is arranged on the boring head, the blade seat is connected to the boring head through a fine-tuning device, and a blade is detachably mounted on the blade seat.

[0008] Preferably, the fine-tuning device includes a dial, a pre-tightening nut, an adjusting nut, a slider and a fixing bolt. A slider hole is arranged on the boring head. The dial is fixedly connected to the pre-tightening nut and rotatably connected to one end of the slider hole on the boring head. The tail end of the dial is threadedly connected to the adjusting nut. The adjusting nut is fixedly connected to the slider. The slider moves along the slider hole. The blade seat is fixedly connected to the slider by a fixing bolt. Limiting grooves and positioning grooves are arranged on both sides of the slider. A plug bolt and a side fixing bolt are correspondingly arranged on the boring head. A positioning pin is extruded on the inner side of the plug bolt. The positioning pin squeezes the positioning groove of the slider. The radial rotation of the slider is limited by the cooperation of the positioning pin and the positioning groove. After the side fixing screw locks the limiting groove, the axial movement of the slider is limited.

[0009] Preferably, the scale plate has scales, and the boring head is provided with corresponding scale indicator lines.

[0010] Preferably, the blade is mounted on the blade seat by bolts, and the blade is a triangular blade.

[0011] Preferably, high-precision threads are correspondingly arranged on the outside of the screw rod and inside the connecting screw hole.

[0012] Preferably, the head of the vibration-resistant boring bar is made of alloy steel, and the rear part is made of tungsten steel, and the two are connected by brazing.

[0013] Preferably, cooling water channels are provided in the anti-vibration boring bar and the boring head, a cooling water inlet is provided at the bottom of the anti-vibration boring bar, and a cooling water outlet is provided on the boring head at a position facing the insert seat.

[0014] Preferably, wrench slots are correspondingly provided on both sides of the boring head.

[0015] Preferably, a gap is provided between the limiting axis of the boring head and the axial center of the screw.

[0016] The beneficial effects of the utility model are as follows: (1) the anti-vibration boring bar and the boring head of the utility model are connected as a whole by means of a limiting shaft and a screw arranged in a conical surface. Through the elastic deformation of the limiting shaft of the boring head, the lower end face of the boring head and the outer conical surface of the limiting shaft are tightly attached to the upper end face and the inner conical surface of the boring bar, thereby increasing the contact surface between the two and improving the overall rigidity of the tool. At the same time, the vibration of the boring head tip is reduced, and the anti-vibration performance is enhanced. The anti-vibration performance is better when combined with the anti-vibration boring bar brazed with alloy steel and tungsten steel; (2) the internal cooling method is more suitable for small-diameter cutting processing; (3) the boring head and the blade are easy to replace and maintain, the cutting size can be fine-tuned, and the application range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a stereogram of the boring head in the utility model;

[0019] Figure 3 It is a front view of the boring head in the utility model;

[0020] Figure 4 It is a rear view of the boring head in the utility model;

[0021] Figure 5 It is a top view of the boring head in the utility model;

[0022] Figure 6 yes Figure 5 A cross-sectional view in the AA direction;

[0023] Figure 7 yes Figure 5 A cross-sectional view in the BB direction;

[0024] Figure 8 It is a structural schematic diagram of the anti-vibration boring bar in the utility model;

[0025] Fig. 9 It is a cross-sectional view of the anti-vibration boring bar in the utility model;

[0026] In the figure: 1. anti-vibration boring bar, 2. boring head, 3. limit shaft, 4. screw, 5. blade seat, 6. wrench slot, 7. dial, 8. scale indicator line, 9. pre-tightening nut, 10. adjusting nut, 11. slider, 12. fixing bolt, 13. blade, 14. cooling water channel, 15. limit groove, 16. positioning groove, 17. positioning pin, 18. plug bolt, 19. side fixing bolt, 20. limit hole, 21. connecting screw hole. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0028] Example: Figure 1-Figure 9 As shown, a replaceable small-aperture anti-vibration fine-tuning boring tool comprises an anti-vibration boring bar 1 and a boring head 2. A limiting shaft 3 with a conical outer surface is fixedly connected to the bottom of the boring head, a screw rod 4 is fixedly connected to the bottom of the limiting shaft, and a limiting hole 20 and a connecting screw hole 21 are correspondingly arranged on the anti-vibration boring bar. The limiting shaft is tightly fitted and connected to the limiting hole, and the screw rod is threadedly connected to the connecting screw hole. A blade seat 5 is arranged on the boring head, and the blade seat is connected to the boring head through a fine-tuning device. A blade 13 is detachably mounted on the blade seat.

[0029] The fine-tuning device includes a dial 7, a pre-tightening nut 9, an adjusting nut 10, a slider 11 and a fixing bolt 12. A slider hole is arranged on the boring head. The dial is fixedly connected to the pre-tightening nut and rotatably connected to one end of the slider hole on the boring head. The tail end of the dial is threadedly connected to the adjusting nut. The adjusting nut is fixedly connected to the slider. The slider moves along the slider hole. The blade seat is fixedly connected to the slider by a fixing bolt. Limiting grooves 15 and positioning grooves 16 are arranged on both sides of the slider. A plug bolt 18 and a side fixing bolt 19 are correspondingly arranged on the boring head. A positioning pin 17 is extruded on the inner side of the plug bolt. The positioning pin squeezes the positioning groove of the slider. The radial rotation of the slider is limited by the cooperation of the positioning pin and the positioning groove. After the side fixing screw locks the limiting groove, the axial movement of the slider is limited.

[0030] The scale plate has scales, and the boring head is correspondingly provided with scale indicator lines 8. The blade is mounted on the blade seat by bolts, and the blade is a triangular blade.

[0031] High-precision threads are set on the outside of the screw and inside the connecting screw hole. The head of the anti-vibration boring bar is made of alloy steel, and the rear part is made of tungsten steel, and the two are connected by brazing.

[0032] A cooling water channel 14 is arranged in the anti-vibration boring bar and the boring head. A cooling water inlet is arranged at the bottom of the anti-vibration boring bar, and a cooling water outlet is arranged on the boring head at a position facing the insert seat.

[0033] The two sides of the boring head are provided with wrench slots 6, which are convenient for disassembly and assembly of the boring head and the anti-vibration boring bar. A gap is provided between the limiting axis of the boring head and the axial center of the screw.

[0034] The utility model discloses a vibration-resistant boring bar and a boring head which are fastened into a whole by a limiting shaft and a screw which are arranged in a conical surface; the lower end face of the boring head and the outer cone surface of the limiting shaft are tightly attached to the upper end face and the inner cone surface of the boring bar through the elastic deformation of the limiting shaft of the boring head, thereby increasing the contact surface between the two, improving the overall rigidity of the tool, reducing the vibration of the boring head tip, and enhancing the vibration-resistant performance; the vibration-resistant boring bar brazed with alloy steel and tungsten steel has better vibration-resistant performance; the internal cooling method is more suitable for small-diameter cutting; the boring head and the blade are easy to replace and maintain, the cutting size can be fine-tuned, and the application range is wide.

[0035] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A replaceable small-aperture anti-vibration fine-tuning boring tool, characterized in that: The invention comprises a vibration-resistant boring bar and a boring head. A limiting shaft with a conical outer surface is fixedly connected to the bottom of the boring head. A screw rod is fixedly connected to the bottom of the limiting shaft. A limiting hole and a connecting screw hole are correspondingly arranged on the vibration-resistant boring bar. The limiting shaft is tightly fitted and connected to the limiting hole. The screw rod is threadedly connected to the connecting screw hole. A blade seat is arranged on the boring head. The blade seat is connected to the boring head through a fine-tuning device. A blade is detachably mounted on the blade seat.

2. The replaceable small-aperture anti-vibration fine-tuning boring tool according to claim 1 is characterized in that: The fine-tuning device includes a dial, a pre-tightening nut, an adjusting nut, a slider and a fixing bolt. The boring head is provided with a slider hole. The dial is fixedly connected to the pre-tightening nut and rotatably connected to one end of the slider hole on the boring head. The tail end of the dial is threadedly connected to the adjusting nut. The adjusting nut is fixedly connected to the slider. The slider moves along the slider hole. The blade seat is fixedly connected to the slider by a fixing bolt. Limiting grooves and positioning grooves are provided on both sides of the slider. A plug bolt and a side fixing bolt are correspondingly provided on the boring head. A positioning pin is extruded on the inner side of the plug bolt. The positioning pin squeezes the positioning groove of the slider. The radial rotation of the slider is limited by the cooperation of the positioning pin and the positioning groove. After the side fixing screw locks the limiting groove, the axial movement of the slider is limited.

3. The replaceable small-aperture anti-vibration fine-tuning boring tool according to claim 2 is characterized in that: The scale plate is provided with scales, and the boring head is provided with scale indicating lines corresponding thereto.

4. The replaceable small-aperture anti-vibration fine-tuning boring tool according to claim 1 is characterized in that: The blade is mounted on the blade seat through bolts, and the blade is a triangular blade.

5. The replaceable small-aperture anti-vibration fine-tuning boring tool according to claim 1 is characterized in that: High-precision threads are correspondingly arranged outside the screw rod and inside the connecting screw hole.

6. The replaceable small-aperture anti-vibration fine-tuning boring tool according to claim 1 is characterized in that: The head of the anti-vibration boring bar is made of alloy steel, and the rear part is made of tungsten steel, and the two are connected by brazing.

7. The replaceable small-aperture anti-vibration fine-tuning boring tool according to claim 1 is characterized in that: The anti-vibration boring bar and the boring head are provided with cooling water channels, the bottom of the anti-vibration boring bar is provided with a cooling water inlet, and the boring head is provided with a cooling water outlet at a position facing the blade seat.

8. The replaceable small-aperture anti-vibration fine-tuning boring tool according to claim 1 is characterized in that: Wrench slots are correspondingly arranged on both sides of the boring head.

9. The replaceable small-aperture anti-vibration fine-tuning boring tool according to claim 1 is characterized in that: A gap is provided between the limiting shaft of the boring head and the axial center of the screw.

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