Slender pipe inner and outer surface precision grinding device based on arc combined magnetic poles

Abstract

The utility model belongs to the technical field of magnetic grinding, and particularly relates to a precise grinding device for the inner surface and the outer surface of a slender pipe based on an arc combined magnetic pole, which is characterized by comprising a pipe fitting rotating mechanism, an arc combined magnetic pole magnetic particle grinding box and a movable sliding table, the arc-shaped combined magnetic pole magnetic particle grinding box comprises two magnetic pole shafts, two arc-shaped magnetic poles, two small straight gears, a large straight gear meshed with the two small straight gears and a servo motor II, the movable sliding table comprises a sliding rail, a lead screw, a movable platform and a stepping motor, and the arc-shaped combined magnetic pole magnetic particle grinding box is arranged on the movable platform. The inner surface and the outer surface of the pipe fitting can be ground, the grinding uniformity in the circumferential direction and the axial direction of the pipe fitting can be guaranteed, the problem that in the magnetic particle grinding technology, due to the fact that magnetic abrasive particles are used for a long time, abrasive particle cutting edges become blunt, and the abrasive particles cannot be updated is solved through rotation of a magnetic field and the pipe fitting, and the magnetic particle grinding efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetic grinding, in particular to a device for precisely grinding the inner and outer surfaces of a slender tube based on arc combined magnetic poles. Background Art

[0002] With the continuous improvement of science and technology, the machinery, petrochemical, medical and other industries are developing rapidly. As an important carrier for transportation and other aspects, pipes are increasingly required in various fields. Stainless steel slender pipes have surface defects inside after production and processing, which will affect the entire pipeline system after use. There are also many processing marks on the outer surface, so finishing methods are needed to reduce the roughness of the inner surface of the pipes and remove surface defects. Magnetic particle grinding finishing technology has strong self-sharpening, wide application range, good processing effect, and improves the physical and mechanical properties of the workpiece. It can solve the problem that the inner surface of the traditional slender tube finishing is difficult to polish and cannot achieve the ideal surface quality, so that the slender tube meets the use requirements. There are defects on the inner surface of the slender tube, but the roughness of the outer surface of the slender tube still affects its use. The inner and outer surfaces of the slender tube are ground twice, which will extend the processing cycle. Summary of the invention

[0003] The utility model aims to provide a device for precision grinding the inner and outer surfaces of a slender tube based on arc combined magnetic poles, which can simultaneously process the inner and outer surfaces of the slender tube, ensure grinding uniformity, improve workpiece quality, and improve processing efficiency.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] The utility model is a device for precisely grinding the inner and outer surfaces of a slender tube based on arc-shaped combined magnetic poles, which is characterized by comprising a tube rotating mechanism, an arc-shaped combined magnetic pole magnetic particle grinding box and a movable slide.

[0006] The pipe fitting rotating mechanism comprises a servo motor I, a three-jaw chuck and a tail end bearing seat. One end of the pipe fitting is fixed by the three-jaw chuck and the other end is fixed by the tail end bearing seat through a clamping coupling. The rotation and speed of the pipe fitting are controlled by the servo motor I.

[0007] The arc-shaped combined magnetic pole magnetic particle grinding box comprises a box body, two magnetic pole shafts arranged in the box body and supported by two pairs of deep groove ball bearings, two arc-shaped magnetic poles arranged on the two magnetic pole shafts, two small spur gears arranged at the ends of the two magnetic pole shafts, a large spur gear meshing with the two small spur gears, and a servo motor II connected to the large spur gear.

[0008] The movable slide comprises a slide rail and a lead screw arranged in parallel, a movable platform sliding along the slide rail and the lead screw, a stepper motor connected to the lead screw, and the arc-shaped combined magnetic pole magnetic particle grinding box is arranged on the movable platform.

[0009] A cylindrical auxiliary magnetic pole is arranged inside the pipe fitting, and the cylindrical auxiliary magnetic pole is attached to the inner surface of the pipe fitting by the magnetic attraction of two outer arc-shaped magnetic poles.

[0010] The tube is filled with magnetic particles, and the space between the tube and the two arc-shaped magnetic poles is filled with magnetic particles.

[0011] The distance between the outer circumferential surface of the two arc-shaped magnetic poles and the outer circumferential surface of the pipe is 2 mm.

[0012] Advantages of the utility model:

[0013] The utility model discloses a precise grinding device for inner and outer surfaces of slender tubes based on arc combined magnetic poles, which can grind the inner and outer surfaces of the tubes and ensure the grinding uniformity in both the circumferential and axial directions of the tubes. The magnetic particle grinding device for inner and outer surfaces utilizes the magnetic field and the rotation of the tubes to solve the problem in the magnetic particle grinding technology that the cutting edges of magnetic abrasive particles become blunt due to long-term use and the abrasive particles cannot be renewed, thereby improving the magnetic particle grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the arc-shaped combined magnetic pole and magnetic particle grinding box of the utility model.

[0016] Figure 3 It is a structural schematic diagram of the arc-shaped magnetic pole of the utility model.

[0017] Figure 4 This is a layout diagram of the cylindrical auxiliary magnetic poles and arc-shaped magnetic poles of the utility model.

[0018] Figure 5 It is a schematic structural diagram of the cylindrical auxiliary magnetic pole of the utility model. DETAILED DESCRIPTION

[0019] The specific implementation of the present utility model is further described below in conjunction with the accompanying drawings.

[0020] like Figure 1-5 As shown, the utility model is a device for precisely grinding the inner and outer surfaces of a slender tube based on arc-shaped combined magnetic poles, which is characterized by comprising a tube rotating mechanism, an arc-shaped combined magnetic pole magnetic particle grinding box 5 and a movable slide.

[0021] The pipe fitting rotating mechanism comprises a servo motor Ⅰ1, a three-jaw chuck 3 and a tail end bearing seat 7. One end of the pipe fitting 4 is fixed by the three-jaw chuck 3, and the other end is fixed by the tail end bearing seat 7 through a clamping coupling 6. The rotation and speed of the pipe fitting 4 are controlled by the servo motor Ⅰ1 to achieve circumferential grinding inside the pipe fitting 4.

[0022] The arc-shaped combined magnetic pole magnetic particle grinding box 5 includes a box body, two magnetic pole shafts 13 arranged in the box body and supported by two pairs of deep groove ball bearings 12, two arc-shaped magnetic poles 14 arranged on the two magnetic pole shafts 13, two small spur gears 8 arranged at the ends of the two magnetic pole shafts 13, a large spur gear 13 meshing with the two small spur gears 8, and a servo motor II 15 connected to the large spur gear 13.

[0023] The movable slide comprises a slide rail 10 and a lead screw 2 arranged in parallel, a movable platform 9 sliding along the slide rail 10 and the lead screw 2, a stepper motor connected to the lead screw 2, and the arc-shaped combined magnetic pole magnetic particle grinding box 5 is arranged on the movable platform 9.

[0024] A cylindrical auxiliary magnetic pole 17 is arranged inside the pipe 4 , and the cylindrical auxiliary magnetic pole 17 is attached to the inner surface of the pipe 4 by the magnetic attraction of the two outer arc-shaped magnetic poles 14 .

[0025] The tube 4 is filled with magnetic particles 16 , and the space between the tube 4 and the two arc-shaped magnetic poles is filled with magnetic particles 16 .

[0026] The distance between the outer circumferential surface of the two arc-shaped magnetic poles 14 and the outer circumferential surface of the pipe 4 is 2 mm.

[0027] like Figure 1-Figure 5 As shown, the magnetic particle grinding device for the inner and outer surfaces of a slender tube described in the present invention includes a tube rotating mechanism, an arc-shaped combined magnetic pole magnetic particle grinding box 5, and a movable slide; the tube rotating mechanism includes a servo motor Ⅰ1, a three-jaw chuck 3 and a tail end bearing seat 7, and the three-jaw chuck 3 is used to clamp one end of the slender tube 4, and the arc-shaped combined magnetic pole magnetic particle grinding box 5 is passed through the middle, and the other end is fixed by a clamping coupling 6 on the tail end bearing seat 7, and the three-jaw chuck 3 is driven to rotate by the servo motor Ⅰ1 inside the control box, thereby driving the slender tube 4 to rotate.

[0028] The arc-shaped combined magnetic pole magnetic particle grinding box 5 is composed of two arc-shaped magnetic poles 14, a magnetic pole shaft 13, a servo motor II 15, a deep groove ball bearing 12, a small spur gear 8, and a large spur gear 11; the two arc-shaped magnetic poles 14 and the magnetic pole shaft 13 are fixed together with a rubber sleeve, and fixed with the box seat and the servo motor II 15, and a key is used inside to fix it circumferentially, and the two ends are fixed axially with shaft end retaining rings. The small spur gear 8 is installed at the same side of the magnetic pole shaft 13 and the motor shaft inside the motor, and the large spur gear 11 is installed on the lower motor shaft, and it is ensured that the large spur gear 11 is meshed with the two small spur gears 8. Start the servo motor II 15 to control the rotation of the motor shaft, and control the rotation of the magnetic pole shaft 13 after transmission, and the speed of the magnetic pole shaft 13 can be controlled by the servo motor II 15.

[0029] The movable slide is mainly composed of a movable platform 9, a slide rail 10, a lead screw 2 and a stepper motor. The slide rail 10 is placed on a horizontal plane, the lead screw 2 and the slide rail 10 are fixed, and the movable platform 9 is installed on the slide rail 10. The stepper motor in the control box is used to control the rotation of the lead screw 2 to drive the movable platform 9 to move horizontally in the axial direction, and the moving speed of the movable platform 9 can be adjusted according to different pipe types.

[0030] The specific implementation steps of the utility model are as follows:

[0031] 1. Place the movable slide on a horizontal plane and fix it to prevent movement during processing. Fix the arc-shaped combined magnetic pole magnetic particle grinding box 5 on the movable platform 9, and fix the tail end bearing seat 7 on the tail end of the movable slide to ensure that the tail end bearing seat 7 is concentric with the motor spindle.

[0032] 2. Before processing, place the magnetic particles 16 inside the pipe 4 and between the pipe 4 and the two arc-shaped magnetic poles 14, then seal the two ends of the pipe 4 with tape and fix them on the three-jaw chuck 3 and the tail end bearing seat 7 respectively, ensuring that the outer circumferential surface of the two arc-shaped magnetic poles 14 always maintains a distance of 2 mm from the outer surface of the pipe 4.

[0033] 3. Start the servo motor Ⅰ1 inside the control box to drive the pipe 4 to rotate, and set the required speed according to the processing requirements to achieve circumferential grinding of the pipe 4, and start another servo motor Ⅱ15 to control the rotation of the magnetic poles in the arc-shaped combined magnetic pole magnetic particle grinding box 5 to generate a rotating magnetic field, so that the magnetic field at the processed part changes periodically, ensuring that the magnetic particles 16 are updated during the processing process.

[0034] 4. The cylindrical auxiliary magnetic pole 17 inside the pipe 4 is attracted by the two outer arc-shaped magnetic poles 14 and is only adsorbed on the inner surface of the pipe 4, and always moves with the two outer arc-shaped magnetic poles 14, and its length is slightly shorter than the length of the two outer arc-shaped magnetic poles 14.

[0035] 5. Start the stepper motor inside the control box to rotate the lead screw 2, driving the mobile platform 9 and the fixed arc-shaped combined magnetic pole magnetic particle grinding box 5 above it to move axially horizontally to ensure uniform axial grinding of the pipe 4.

[0036] 6. After grinding, turn off the two servo motors and the stepper motor, disassemble the pipe 4, remove the tapes at both ends, clean the inside and surface of the pipe 4, and ensure that the residual abrasive particles are cleaned.

[0037] The utility model is a device for precisely grinding the inner and outer surfaces of slender tubes based on arc combined magnetic poles. The device generates a rotating magnetic field by rotating magnetic poles, so that the magnetic field of the outer surface being processed changes, and the abrasive grains are renewed. This solves the problem that the abrasive grains are used for a long time in magnetic grain grinding technology, and the abrasive grain cutting edges become blunt and the abrasive grains cannot be renewed. The efficiency of magnetic grain grinding is improved, and the device can ensure that the inner and outer surfaces of the pipe are processed uniformly. The device can meet the requirements of different pipe fittings, and the processing is simple and convenient.

Claims

1. A precision grinding device for the inner and outer surfaces of a slender tube based on arc combined magnetic poles, characterized in that It includes a pipe rotating mechanism, an arc-shaped combined magnetic pole magnetic particle grinding box and a movable slide. The pipe fitting rotating mechanism comprises a servo motor I, a three-jaw chuck and a tail end bearing seat. One end of the pipe fitting is fixed by the three-jaw chuck and the other end is fixed by the tail end bearing seat through a clamping coupling. The rotation and speed of the pipe fitting are controlled by the servo motor I. The arc-shaped combined magnetic pole magnetic particle grinding box comprises a box body, two magnetic pole shafts arranged in the box body and supported by two pairs of deep groove ball bearings, two arc-shaped magnetic poles arranged on the two magnetic pole shafts, two small spur gears arranged at the ends of the two magnetic pole shafts, a large spur gear meshing with the two small spur gears, and a servo motor II connected to the large spur gear. The movable slide comprises a slide rail and a lead screw arranged in parallel, a movable platform sliding along the slide rail and the lead screw, a stepper motor connected to the lead screw, and the arc-shaped combined magnetic pole magnetic particle grinding box is arranged on the movable platform.

2. The device for precision grinding of inner and outer surfaces of a slender tube based on arc combined magnetic poles according to claim 1, characterized in that: A cylindrical auxiliary magnetic pole is arranged inside the pipe fitting, and the cylindrical auxiliary magnetic pole is attached to the inner surface of the pipe fitting by the magnetic attraction of two outer arc-shaped magnetic poles.

3. The device for precision grinding of inner and outer surfaces of a slender tube based on arc combined magnetic poles according to claim 1, characterized in that: The tube is filled with magnetic particles, and the space between the tube and the two arc-shaped magnetic poles is filled with magnetic particles.

4. The device for precision grinding of inner and outer surfaces of a slender tube based on arc combined magnetic poles according to claim 1, characterized in that: The distance between the outer circumferential surface of the two arc-shaped magnetic poles and the outer circumferential surface of the pipe is 2 mm.

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