Gravity balance abrasive belt grinding machine for outer diameter of pipe end

Abstract

The utility model discloses a pipe end outer diameter gravity balance abrasive belt grinding machine which comprises a tensioning wheel, an abrasive belt strip is arranged on the circumferential face of the tensioning wheel, a driving wheel and a stabilizing wheel are arranged above the tensioning wheel, and a base plate is arranged on the left side of the tensioning wheel, the left side of the driving wheel and the left side of the stabilizing wheel. By means of the structure, the to-be-ground steel pipe is supported by the power rolling table, it is guaranteed that the pipe end is suspended, and meanwhile the grinding machine is moved in the axial direction of the to-be-ground steel pipe, so that the edge of the abrasive belt strip is flush with the pipe end; then the grinding machine is moved in the radial direction of the to-be-ground steel pipe to enable the abrasive belt strip to be in a concave state from a straight state, then the motor is started to enable the outer diameter of the end face of the to-be-ground steel pipe to be in stable contact with the abrasive belt strip, the abrasive belt strip forms stable tension under the action of the balance weight sliding block, stable pressure on the outer wall of the to-be-ground steel pipe is formed, and therefore the consistency of the grinding thickness is guaranteed; the tension can be controlled by adjusting the balancing weight, grinding of different thicknesses is achieved, grinding control is strict, and the removal thickness is stable and controllable.

Description

TECHNICAL FIELD

[0001] The utility model relates to composite pipe end outer diameter regrinding technical field especially relates to pipe end outer diameter gravity balance abrasive belt grinding machine. BACKGROUND

[0002] In the composite pipe manufacturing process, scratch, knock mark caused by carrying or hoisting, and outer wall indentation formed during hot rolling of the base pipe of the composite pipe (depth less than 0.5mm) have great influence on the later RT detection.

[0003] The grinding surface of the general grinding machine is not a standard cylinder, and local grinding is prone to be too large, and the grinding depth is uneven. The general abrasive belt grinding machine can be used for most outer diameter grinding, but if the pipe end swings due to the bending of the steel pipe, the contact pressure is unstable, and the grinding thickness is inconsistent. UTILITY MODEL CONTENTS

[0004] The utility model discloses a pipe end outer diameter gravity balance abrasive belt grinding machine, and the steel pipe to be ground is supported by the power roller, the pipe end is ensured to be suspended, the grinding machine is moved along the axial direction of the steel pipe to be ground, the edge of the abrasive belt strip is flush with the pipe end, then the grinding machine is moved along the radial direction of the steel pipe to be ground, the abrasive belt strip changes from the flat state to the concave state, then the motor is started, the outer diameter of the end surface of the steel pipe to be ground is in stable contact with the abrasive belt strip, the abrasive belt strip forms stable tension under the action of the counterweight sliding block, forms the stable pressure to the outer wall of the steel pipe to be ground, thereby guaranteeing the consistency of the grinding thickness, the size of the tension can be adjusted by adjusting the counterweight block, the grinding of different thicknesses is obtained, the grinding control is strict, and the removal thickness is stable and controllable.

[0005] To realize the above-mentioned purpose, the pipe end outer diameter gravity balance abrasive belt grinding machine is provided, which comprises: a tensioning wheel, a sand belt strip is arranged on the circumferential surface of the tensioning wheel, a driving wheel and a stabilizing wheel are arranged above the tensioning wheel, a base plate is arranged on the left side of the tensioning wheel, the driving wheel and the stabilizing wheel, a long hole groove is arranged on the base plate, a counterweight sliding block and a motor are slidably connected to the left side wall of the base plate, the counterweight sliding block is located below the motor, and a steel pipe to be ground is arranged at the rear of the base plate.

[0006] According to the pipe end outer diameter gravity balance abrasive belt grinding machine, the stabilizing wheel is connected with the base plate through a pin shaft.

[0007] According to the pipe end outer diameter gravity balance abrasive belt grinding machine, the output end of the motor is fixedly connected with the driving wheel.

[0008] According to the pipe end outer diameter gravity balance abrasive belt grinding machine, the circumferential surfaces of the tensioning wheel, the driving wheel and the stabilizing wheel are all rotationally connected with the sand belt strip.

[0009] The tensioning wheel is connected with the counterweight sliding block through a tensioning shaft.

[0010] According to the pipe end outer diameter gravity balance abrasive belt grinding machine, the steel pipe to be ground is supported by an external power roller.

[0011] The above scheme has the beneficial effects that the steel pipe to be ground is supported by a power roller, the pipe end is suspended, the grinding machine is moved along the axial direction of the steel pipe to be ground, the edge of the abrasive belt strip is flush with the pipe end, then the grinding machine is moved along the radial direction of the steel pipe to be ground to make the abrasive belt strip change from a flat state to a concave state, the motor is started, the outer diameter of the pipe end surface of the steel pipe to be ground is in stable contact with the abrasive belt strip, the abrasive belt strip forms stable tension under the action of the counterweight sliding block, stable pressure is formed on the outer wall of the steel pipe to be ground, the consistency of the grinding thickness is ensured, the size of the tension can be adjusted by adjusting the counterweight block, different thicknesses of grinding can be obtained, the grinding control is strict, and the removal thickness is stable and controllable.

[0012] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0013] The present application will be further described below in conjunction with the drawings and embodiments.

[0014] Figure 1 It is a front view of the pipe end outer diameter gravity balance abrasive belt grinding machine of the present application.

[0015] Figure 2 It is a side view of the pipe end outer diameter gravity balance abrasive belt grinding machine of the present application.

[0016] Figure 3 It is a front view of the pipe end outer diameter gravity balance abrasive belt grinding machine of the present application.

[0017] Figure 4 It is a front view of the pipe end outer diameter gravity balance abrasive belt grinding machine of the present application. Figure 3 It is a sectional view of A in the middle.

[0018] Figure 5 It is an oblique view of the pipe end outer diameter gravity balance abrasive belt grinding machine of the present application.

[0019] LEGEND

[0020] 1, tensioning wheel; 2, abrasive belt strip; 3, driving wheel; 4, stabilizing wheel; 5, base plate; 6, long hole groove; 7, steel pipe to be ground; 8, counterweight sliding block; 9, motor. DETAILED DESCRIPTION

[0021] The detailed description of the specific embodiments of the present application will be described in this part, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0022] Referring to Figures 1-5 , the pipe end outer diameter gravity balance abrasive belt grinding machine of the present application embodiment comprises: a tensioning wheel 1, the circumferential surface of the tensioning wheel 1 is provided with a sand belt strip 2, the upper side of the tensioning wheel 1 is provided with a driving wheel 3 and a stabilizing wheel 4, the circumferential surfaces of the tensioning wheel 1, the driving wheel 3 and the stabilizing wheel 4 are all rotationally connected with the sand belt strip 2, the length of the belt between the driving wheel 3 and the tensioning wheel 1 is about 600mm, the press-in depth is 25±10mm. The corresponding angle is 4.78±1.92°, the pressure change caused thereby is less than ±3%, the pressure corresponding to a 20Kg weight is about 1.67Kg (plus or minus 3%), which can ensure that the grinding amount per revolution is less than 0.1mm and is continuously stable, the left side of the tensioning wheel 1, the driving wheel 3 and the stabilizing wheel 4 is provided with a base plate 5, the stabilizing wheel 4 is connected with the base plate 5 through a pin shaft, high-speed bearings are adopted therebetween to ensure smooth rotation and play a role in ensuring stable rotation of the sand belt strip 2 without deviation, a long hole groove 6 is arranged on the base plate 5, a counterweight sliding block 8 and a motor 9 are slidingly connected on the left side wall of the base plate 5, the counterweight sliding block 8 is located below the motor 9, the tensioning wheel 1 is connected with the counterweight sliding block 8 through a tensioning shaft, the weight of the entire tensioning assembly is adjusted to be about 20Kg, all the tensioning assemblies are connected with the base plate 5 through linear guides and are ensured to move smoothly in the vertical direction, the output end of the motor 9 is fixedly connected with the driving wheel 3, the rotating speed is controlled to be about 2000rpm through a frequency converter, and the motor 9 rotates clockwise, a steel pipe to be ground 7 is arranged at the rear of the base plate 5, the steel pipe to be ground 7 is supported by external power rollers (this is prior art and will not be described here).

[0023] Working principle: the steel pipe to be ground 7 is supported by power rollers, ensuring that the pipe end is suspended in the air, and at the same time, the grinding machine is moved axially along the steel pipe to be ground 7, so that the edge of the sand belt strip 2 is flush with the pipe end; then the grinding machine is moved radially along the steel pipe to be ground 7 to make the sand belt strip 2 change from a flat state to an inwardly concave state, and then the motor 9 is started, so that the end face outer diameter of the steel pipe to be ground 7 is in stable contact with the sand belt strip 2, the sand belt strip 2 forms a stable tension under the action of the counterweight sliding block 8, forming a stable pressure on the outer wall of the steel pipe to be ground 7, thereby ensuring the consistency of the grinding thickness.

[0024] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge range possessed by ordinary skilled persons in the art without departing from the purpose of the present application.

Claims

1. A gravity balanced pipe end outside diameter abrasive belt sander comprising: Tensioning wheel (1), characterized in that the circumferential surface of the tensioning wheel (1) is provided with a sand belt strip (2), the upper side of the tensioning wheel (1) is provided with a driving wheel (3) and a stabilizing wheel (4), the left side of the tensioning wheel (1), the driving wheel (3) and the stabilizing wheel (4) is provided with a base plate (5), the base plate (5) is provided with an elongated hole slot (6), the left side wall of the base plate (5) is slidably connected with a counterweight sliding block (8) and a motor (9), the counterweight sliding block (8) is located below the motor (9), the rear side of the base plate (5) is provided with a steel pipe to be ground (7).

2. The pipe end outer diameter gravity balanced abrasive belt sander of claim 1, wherein, The stabilizing wheel (4) is connected with the base plate (5) through a pin shaft.

3. The pipe end outer diameter gravity balanced abrasive belt sander of claim 1 wherein, The output end of the motor (9) is fixedly connected with the driving wheel (3).

4. The pipe end outer diameter gravity balanced abrasive belt sander of claim 1 wherein, The circumferential surface of the tensioning wheel (1), the driving wheel (3) and the stabilizing wheel (4) is rotatably connected with the sand belt strip (2).

5. The pipe end outer diameter gravity balanced abrasive belt sander of claim 1 wherein, The tensioning wheel (1) is connected with the counterweight sliding block (8) through a tensioning shaft.

6. The pipe end outer diameter gravity balanced abrasive belt sander of claim 1 wherein, The steel pipe to be ground (7) is supported by external power rollers.

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