Portable air pipe end inner and outer chamfering cutter

Abstract

This invention relates to a portable air pipe end chamfering tool, comprising a chamfering mechanism including a detachable outer chamfering head and an inner chamfering head, which are detachably connected together by fixing bolts and a rear cover plate. A transmission gear set is provided on the inner side of the rear cover plate. During operation, the outer and inner chamfering heads interact through the transmission gear set, rotating in opposite directions, achieving simultaneous inner and outer chamfering. A spring is provided at the rear end of the inner chamfering head, with one end abutting against the rear cover plate and the other end abutting against an adjusting nut. During operation, the compression of the spring is adjusted by rotating the adjusting nut to control the extension and retraction force of the inner chamfering head at the same position, thereby achieving appropriate adjustment of the inner and outer chamfer dimensions.

Description

Technical Field

[0001] This invention relates to the field of steel pipe cutting technology, and more specifically to a portable air pipe end chamfering tool. Background Technology

[0002] After steel pipes are cut using grinding wheels, band saws, hacksaws, etc., burrs and flash of various sizes will appear on both the inside and outside of the ends. These burrs significantly affect the quality of subsequent processes such as welding, tapping, and pre-installing clamps, and may even prevent further processing. For example, if burrs and flash are present in the fabrication of air hoses for locomotives, pre-installation of clamps is impossible, and there is also a risk of injury. Therefore, it is necessary to chamfer the inside and outside of the ends to remove the flash and burrs.

[0003] The above-mentioned technical problems can be solved by chamfering the inside and outside of the steel pipe ends, but the existing methods have the following shortcomings: using files and scrapers for chamfering is not easy to operate, time-consuming and labor-intensive, and the quality cannot be guaranteed; using chamfering machines is relatively bulky and not easy to transport; chamfering machines that use multiple cutting tools to chamfer the inside and outside of the steel pipe ends at the same time are prone to tool damage and tool replacement is laborious; and the chamfering size cannot be adjusted.

[0004] For example, Chinese utility model patent CN 211588774 U discloses an automatic clamping and chamfering device for hollow pipes, comprising a control box, a mounting frame, and a chamfering device. The mounting frame includes a base, a component mounting frame, and a pressing component. The chamfering device includes a motor, a pushing component, a linkage component, and a chamfering component. This utility model uses the pressing component to press and position the pipe material inserted into the air shaft, preventing wobbling during processing and ensuring stable positioning, thus improving processing quality and accuracy. By setting up the chamfering component with two inner and two outer chamfering blades, simultaneous inner and outer chamfering of the pipe material is achieved, increasing chamfering efficiency and reducing costs. This automatic clamping and chamfering device for hollow pipes has a simple structure, is easy to use, and has high production efficiency. However, this chamfering device is very complex, difficult to maintain, and inconvenient to transport.

[0005] For example, Chinese utility model patent CN 219598291 U discloses a steel pipe internal and external chamfering device, including a mounting base plate, a drive mechanism, a floating mechanism, and a chamfering mechanism. The mounting base plate has a through hole in the middle and through holes on both sides. The floating mechanism provides axial force close to the steel pipe to the chamfering mechanism, which rests against the lower edge of the steel pipe for internal and external chamfering. The chamfering mechanism is mounted on the output shaft of the drive mechanism. The drive mechanism is mounted below the mounting base plate to drive the chamfering mechanism to rotate. The floating mechanism and the chamfering mechanism are mounted above the mounting base plate, with the steel pipe positioned above the internal and external chamfering device. This utility model uses a robotic arm to grip the steel pipe, a motor to drive the chamfering mechanism to rotate, and the overall floating mechanism and chamfering mechanism adapt to different pipe diameters and cutting forces, achieving simultaneous internal and external chamfering while ensuring consistency and accuracy. However, this chamfering device is prone to skewing during operation and can only chamfer one type of steel pipe, resulting in a narrow application range. Summary of the Invention

[0006] In order to overcome the above-mentioned technical defects in the prior art, the present invention aims to provide a portable air pipe end chamfering tool, which solves the technical problems of complex structure and narrow application range in the prior art by using separate chamfering tools.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0008] A portable air pipe end chamfering tool includes a chamfering mechanism, which includes a detachable outer chamfering head and an inner chamfering head. The outer chamfering head and the inner chamfering head are detachably connected together by fixing bolts and a rear cover plate. A transmission gear set is provided on the inner side of the rear cover plate.

[0009] Preferably, the rear end of the inner chamfering cutter is provided with a spring, thereby realizing the extension and retraction of the inner chamfering cutter and realizing the inner and outer chamfering of steel pipes of various specifications.

[0010] In any of the above embodiments, it is preferred that one end of the spring abuts against the rear cover plate and the other end abuts against the adjusting nut.

[0011] In any of the above embodiments, it is preferred that the tail of the internal chamfering cutter head is a threaded rod for connecting an adjusting nut.

[0012] In any of the above embodiments, it is preferred that the inner ring of the rear cover plate has three circular holes, and the gear shaft in the transmission gear set cooperates with the circular holes on the rear cover plate, so that when the inner chamfering cutter head rotates, it drives the transmission gear set to rotate, thereby realizing the simultaneous operation of inner and outer chamfering.

[0013] In any of the above embodiments, it is preferred that four threaded holes are correspondingly opened on the outer ring of the rear cover plate and the outer end face of the outer chamfering head. The threaded holes cooperate with the fixing bolts to connect the rear cover plate to the outer end face of the outer chamfering head.

[0014] In any of the above embodiments, it is preferred that the teeth of the outer chamfering cutter and the inner chamfering cutter are oblique teeth and in opposite directions, which facilitates the cutting of the inner and outer chamfers.

[0015] In any of the above embodiments, it is preferred that a bearing is provided between the outer chamfering cutter head and the inner chamfering cutter head.

[0016] In any of the above solutions, it is preferred that the tail end face of the inner chamfering cutter is hexagonal, which makes it easy to lock onto rotating tools and equipment without loosening.

[0017] In any of the above embodiments, it is preferred that the tail end of the internal chamfering tool is engaged with a rotating tool of an electric drill, bench drill, drilling machine, or lathe.

[0018] In summary, the portable air pipe end chamfering tool of the present invention has the following advantages: it is simple, lightweight, and easy to operate; it is suitable for chamfering the ends of various specifications of steel pipes; the chamfering size can be adjusted appropriately; the tool is suitable for rotating tools and equipment such as electric drills, bench drills, drilling machines, and lathes; it can perform internal and external chamfering simultaneously, resulting in high efficiency; it has a robust structure and is easy to install and disassemble; and it has a simple structure and low cost.

[0019] Explanation of icon numbers

[0020] 1. External chamfering cutter head, 2. Bearing, 3. Transmission gear set, 4. Internal chamfering cutter head, 5. Fixing bolt, 6. Material receiving spring, 7. Rear cover plate, 8. Adjusting nut. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a preferred embodiment of the portable air line end chamfering tool according to the present invention. Detailed Implementation

[0022] The following description is merely exemplary and not intended to limit this disclosure, its application, or its uses. The specific embodiments of the portable air line end chamfering tool of the present invention will be further described below with reference to the accompanying drawings.

[0023] like Figure 1The diagram shows a preferred embodiment of the portable air line end chamfering tool according to the present invention. The portable air line end chamfering tool of the present invention includes a chamfering mechanism comprising a detachable outer chamfering head 1 and an inner chamfering head 4, which are detachably connected together by a fixing bolt 5 and a rear cover plate 7. A transmission gear set 3 is provided on the inner side of the rear cover plate 7. During operation, the outer chamfering head 1 and the inner chamfering head 4 interact through the transmission gear set 3, rotating in opposite directions, thus achieving simultaneous inner and outer chamfering.

[0024] In this embodiment, the rear end of the inner chamfering cutter head 4 is provided with a spring 6, thereby realizing the extension and retraction of the inner chamfering cutter head and realizing the inner and outer chamfering of steel pipes of various specifications.

[0025] In this embodiment, one end of the spring abuts against the rear cover plate 7, and the other end abuts against the adjusting nut 8. During operation, the compression of the spring 6 is adjusted by rotating the adjusting nut 8 to control the extension and retraction force of the chamfering cutter head 4 at the same position, thereby achieving appropriate adjustment of the inner and outer chamfer dimensions.

[0026] In this embodiment, the tail of the inner chamfering cutter head 4 is a threaded rod used to connect to the adjusting nut 8. During operation, the compression of the spring 6 is adjusted by rotating the adjusting nut 8 to control the extension and retraction force of the inner chamfering cutter head 4 at the same position, thereby achieving appropriate adjustment of the inner and outer chamfer dimensions.

[0027] In this embodiment, the inner ring of the rear cover plate 7 has three circular holes. The gear shaft in the transmission gear set 3 engages with the circular holes on the rear cover plate 7, so that when the inner chamfering cutter head 4 rotates, it drives the transmission gear set 3 to rotate, thus realizing the simultaneous operation of inner and outer chamfering.

[0028] In this embodiment, four threaded holes are correspondingly opened on the outer ring of the rear cover plate 7 and the outer end face of the outer chamfering head 1. The threaded holes cooperate with the fixing bolts 5 to connect the rear cover plate 7 to the outer end face of the outer chamfering head 1.

[0029] In this embodiment, the outer chamfering cutter head 1 and the inner chamfering cutter head 4 have oblique tooth shapes and are in opposite directions, which facilitates the cutting of inner and outer chamfers.

[0030] In this embodiment, a bearing 2 is provided between the outer chamfering cutter head 1 and the inner chamfering cutter head 4.

[0031] In this embodiment, the tail end face of the inner chamfering cutter head 4 is hexagonal, which makes it easy to lock onto rotating tools and equipment without loosening.

[0032] In any of the above embodiments, it is preferred that the tail end of the internal chamfering cutter head 4 is engaged with a rotating tool of an electric drill, bench drill, drilling machine, or lathe.

[0033] The working process of the portable air pipe end chamfering tool of the present invention is as follows:

[0034] First, rotate the adjusting nut 8 to the appropriate position according to the pipeline specifications;

[0035] Then the inner and outer chamfering tools are installed on rotating tools such as electric drills, bench drills, drilling machines, or lathes;

[0036] Next, turn on the power switch of the rotating equipment, adjust the appropriate speed, and place the steel pipe 9 to be worked horizontally forward into the inner and outer cutters. The inner chamfering cutter 4 rotates, which drives the transmission gear set 3 to rotate. The transmission gear set 3 then drives the outer chamfering cutter 1 to rotate in the opposite direction to the inner chamfering cutter 4. The front teeth of the inner and outer cutters chamfer the end of the steel pipe.

[0037] A few seconds later, take out steel pipe 9 and chamfer the other end of steel pipe 9 in the same way;

[0038] After chamfering is completed, disconnect the power, remove the cutting tool and place it in the designated position. The steel pipe chamfering work is now complete.

[0039] In summary, the portable air pipe end chamfering cutter of the present invention has the following advantages: it adopts gear transmission, which is safe and reliable; the compression of the spring 6 is used to realize the extension and retraction of the inner cutter head; the inner and outer cutter heads have opposite tooth directions to realize the cutting of the inner and outer chamfering of the steel pipe in one go; the tail end face of the inner chamfering cutter head 4 is hexagonal, which makes it easy to lock onto rotating tools and equipment without loosening, and it can be applied to a variety of rotating tools and equipment.

[0040] Those skilled in the art will readily understand that the portable air pipe end chamfering tool of the present invention comprises any combination of the parts described in this specification. Due to space limitations and for the sake of brevity, these combinations are not described in detail here; however, after reading this specification, the scope of the invention, constituted by any combination of the parts described herein, is self-evident.

Claims

1. A portable air pipe end chamfering tool, comprising a chamfering mechanism, the chamfering mechanism comprising a detachable outer chamfering head (1) and an inner chamfering head (4), characterized in that: The outer chamfering cutter (1) and the inner chamfering cutter (4) are detachably connected together by fixing bolts (5) and rear cover plate (7); a bearing (2) is provided between the outer chamfering cutter (1) and the inner chamfering cutter (4); a transmission gear set (3) is provided on the inner side of the rear cover plate (7); the outer chamfering cutter (1) and the inner chamfering cutter (4) interact through the transmission gear set (3); three round holes are opened in the inner ring of the rear cover plate (7), and the gear shaft in the transmission gear set (3) is engaged with the round holes on the rear cover plate (7); the tooth shape of the outer chamfering cutter (1) and the inner chamfering cutter (4) is oblique tooth shape and the direction is opposite; when working, the outer chamfering cutter (1) and the inner chamfering cutter (4) rotate in opposite directions, realizing the simultaneous operation of inner and outer chamfering.

2. The portable air pipe end chamfering tool as described in claim 1, characterized in that: The rear end of the inner chamfering cutter (4) is provided with a spring (6).

3. The portable air pipe end chamfering tool as described in claim 2, characterized in that: One end of the spring (6) rests against the rear cover plate (7), and the other end rests against the adjusting nut (8).

4. The portable air pipe end chamfering tool as described in claim 3, characterized in that: The tail of the internal chamfering cutter (4) is a threaded rod, which is used to connect the adjusting nut (8).

5. The portable air pipe end chamfering tool as described in claim 1 or 3, characterized in that: The outer ring of the rear cover plate (7) and the outer end face of the outer chamfering head (1) have four threaded holes respectively. The threaded holes cooperate with the fixing bolts (5) to connect the rear cover plate (7) to the outer end face of the outer chamfering head (1).

6. The portable air pipe end chamfering tool as described in claim 1 or 2, characterized in that: The tail end face of the inner chamfering cutter (4) is hexagonal.

7. The portable air pipe end chamfering tool as described in claim 6, characterized in that: The tail end of the internal chamfering cutter (4) is engaged with the rotating tool of a drilling machine or lathe.

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