CN106863037B - A floating grinding device - Google Patents

Abstract

A floating grinding device, comprising a grinding device and a grinding trolley; the grinding device comprises a grinding wheel unit, a machine frame, and a traverse arm, the grinding wheel unit is connected to the machine frame, the machine frame is connected to the front end of the traverse arm, the traverse arm only drives the machine frame to perform a linear telescopic movement, and the grinding wheel unit makes an arc movement relative to the machine frame; the grinding trolley is provided with idlers for radially rotating a blank tube. The invention has the advantages of simple structure, stable and reliable operation, and improved processing quality and efficiency of blank tubes.

Description

A floating grinding device

technical field

The invention relates to the technical field of pipeline grinding equipment, in particular to a floating grinding device.

Background technique

During the processing of large-size billet pipe blanks, if the centering roller of the piercing machine is not adjusted in place, it cannot stably "hold" the ejector pin, and the ejector pin jumps, which will cause uneven wall thickness. The piercing process is the pre-order step of pipe processing. The uneven pipe wall caused here will affect all subsequent processing steps until the quality of the finished product is unqualified. In addition, other steps in the conventional pipe production process do not have the function and effect of correcting the uneven wall thickness caused by piercing. The problem of uneven wall thickness is very serious. The existing solutions for the uneven wall thickness of the local area of the tube billet caused by the piercing machine need to be rectified by the subsequent cold rolling machine or cold drawing machine, and the number of production and processing passes increases. The effect is extremely unsatisfactory.

Contents of the invention

The object of the present invention is to provide a floating grinding device, which has a simple and reasonable structure, stable and reliable operation, and can correct local uneven pipe walls through the cooperation of the grinding wheel unit with smooth contact on the grinding surface and the traverse device.

The technical purpose of the present invention is achieved through the following technical solutions: a floating grinding device, including a grinding device and a grinding trolley; the grinding device includes a grinding wheel unit, a machine frame, and a traverse arm; the grinding wheel unit is connected to the machine frame, and the machine frame is connected to the front end of the traverse arm;

As a preference of the present invention, a swing arm and a telescopic device are rotatably connected to the unit frame, the end of the swing arm and the telescopic end of the telescopic device are hinged to the rotation shaft of the grinding wheel unit, and the horizontal height of the installation position of the telescopic device is higher than the installation position of the swing arm.

As a preferred aspect of the present invention, the grinding trolley includes a trolley, the trolley is arranged on the track, and a tug wheel is arranged at the bottom of the trolley.

As a preferred embodiment of the present invention, the traversing arm includes a traversing motor, a traversing gear, a traversing rack and a cross arm, the rack is fixedly connected to the cross arm, the rack meshes with the gear, and the gear is connected to the output end of the motor.

As a preference of the present invention, the grinding trolley is provided with two idler rollers, the two idler rollers rotate in opposite directions, and a placement part for placing the blank tube is formed between the two idler rollers.

As a preference of the present invention, the tug wheel is connected to the trolley through a lifting motor, and the lifting motor is a servo motor.

As a preference of the present invention, the speed of the reciprocating linear motion of the traverse arm is automatically adjusted by a frequency converter.

As a preference of the present invention, when the traverse arm linearly pushes the unit frame toward the grinding trolley, the telescopic end of the telescopic device is shortened to lift the grinder unit, and the grinder unit is lifted up in an arc under the restriction of the swing arm so that the included angle between the grinding point of the grinder unit and the rotation axis of the grinder unit and the moving direction of the traverse arm is always greater than 90° and less than 180°.

In summary, the present invention has the following beneficial effects:

The invention has the advantages of simple structure, stable and reliable operation, and improved processing quality and efficiency of blank tubes.

Description of drawings

Fig. 1 is a structural representation of the present invention;

In the picture:

1. Grinding wheel unit, 2. Unit frame, 3. Traversing arm, 4. Idler roller, 5. Swing arm, 6. Telescopic device, 7. Grinding trolley, 8. Track, 9. Tug wheel, 10. Lifting motor.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the embodiment of the present invention includes a grinding device for locally grinding the uneven wall thickness of the blank tube, a grinding trolley 7 for transferring the blank tube and adjusting the grinding surface of the blank tube to cooperate with the grinding device; the grinding device includes a grinding wheel unit 1, a machine frame 2, and a traverse arm 3. Movement; the grinding trolley 7 is provided with an idler roller 4 for radially rotating the blank tube. In the embodiment of the present invention, the blank tube to be ground is first transferred to the grinding trolley 7, and then the grinding trolley 7 runs to the bottom of the grinding wheel unit 1 and stops, and the grinding trolley 7 reaches the processing station, and then the grinding wheel unit 1 performs reciprocating grinding activities on the surface of the blank tube to be repaired through the cooperation of the traverse arm 3 and the machine frame 2 until the grinding is completed. The main motor of the grinder unit 1 in this embodiment uses a power of 7.5KW. The surface grinding amount is ≥0.2mm per pass, which is controlled according to the air pressure and the moving speed of the grinding head of the grinding wheel unit 1. The moving speed of the grinding head is 0.8-10m/min, the moving speed of the grinding head can be adjusted by frequency conversion, and the surface roughness after grinding is Ra 25 um-12.5 um. There are no steps in the grinding area and non-grinding area, and it has the functions of fixed-point grinding, partial grinding, and full grinding. The unit frame 2 is rotatably connected with a swing arm 5 and a telescopic device 6. The end of the swing arm 5 and the telescopic end of the telescopic device 6 are hinged to the rotating shaft of the grinding wheel unit 1. The horizontal height of the installation position of the telescopic device 6 is higher than that of the swing arm 5. The telescopic device 6 is implemented by a telescopic oil cylinder. When the traverse arm 3 linearly pushes the unit frame 2 toward the grinding trolley 7, the telescopic end of the telescopic device 6 is shortened to lift the grinder unit 1, and the grinder unit 1 moves up in an arc under the restriction of the swing arm 5 so that the angle between the grinding point of the grinder unit 1 and the rotation axis of the grinder unit 1 and the direction of motion of the traverse arm 3 is always greater than 90° and less than 180°. Even if the grinder unit 1 performs arc grinding from the upper side of the blank tube, if it grinds in a straight line from the vertical direction, the downward movement of the grinder unit 1 is difficult to control, and it is easy to cause too much grinding due to too much travel. However, when the arc grinding is performed from the side, when the stroke of the grinder unit 1 is too large, the grinder unit 1 also scratches the surface of the leather tube along a certain tangential angle. The amount of grinding in this way is very limited. The stroke of the arm 3 and the telescopic device 6 to the actual motion stroke of the grinding wheel unit 1 is actually reduced, which is equivalent to enlarging the precision required for control and improving the accuracy of control.

Grinding trolley 7 comprises trolley, and trolley is arranged on track 8, and the bottom of trolley is provided with tug wheel 9. The tugwheel 9 is connected with the trolley through the lifting motor 10, and the lifting motor 10 is a servo motor. The height of the trolley is adjusted by controlling the gear rack connected to the tug wheel 9 by the servo motor, so that the distance between the blank tube and the grinding wheel unit 1 can be adjusted. When excessive grinding occurs, the trolley can be lowered and the grinding wheel unit 1 can be lifted at the same time to achieve the first separation, so as to ensure the accuracy of grinding. Due to the arc-shaped lifting structure of the grinding wheel unit 1, the separation between the grinding wheel unit 1 and the blank tube will be slower than the vertical lifting method, so the lifting adjustment of the trolley is very necessary.

The traversing arm 3 includes a traversing motor, a traversing gear, a traversing rack and a cross arm, the rack is fixedly connected to the cross arm, the rack is meshed with the gear, and the gear is connected to the output end of the motor. The speed of the reciprocating linear motion of the traverse arm 3 is automatically adjusted by a frequency converter.

Two supporting rollers 4 are arranged on the grinding trolley 7, and the two supporting rollers 4 are arranged to rotate in opposite directions, and a placement part for placing a blank tube is formed between the two supporting rollers 4 . The supporting rollers 4 which are arranged to rotate in opposite directions can cooperate with the blank tube to be fine-tuned in actual work so that the surface to be polished can always follow the movement of the grinding wheel unit 1.

This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications without creative contribution to this embodiment as required after reading this specification, but as long as they are within the scope of the claims of the present invention, they are all protected by the patent law.

Claims (2)

1. A floating grinding device, characterized in that it includes a grinding device and a grinding trolley (7); the grinding device includes a grinding wheel unit (1), a machine frame (2), and a traverse arm (3), the grinding wheel unit (1) is connected to the machine frame (2), the machine frame (2) is connected to the front end of the traverse arm (3), and the traverse arm (3) only drives the machine frame (2) to do linear telescopic movement, and the grinder unit (1) is relatively to the machine frame (2) ) in an arc motion; the grinding trolley (7) is provided with idler rollers (4) for radially rotating the blank tube; The unit frame (2) is rotatably connected with a swing arm (5) and a telescopic device (6), the end of the swing arm (5) and the telescopic end of the telescopic device (6) are hinged to the rotation shaft of the grinding wheel unit (1), and the horizontal height of the installation position of the telescopic device (6) is higher than the installation position of the swing arm (5); When the traverse arm (3) linearly pushes the unit frame (2) toward the grinding trolley (7), the telescopic end of the telescopic device (6) shortens to lift the grinder unit (1), and the grinder unit (1) moves up in an arc under the restriction of the swing arm (5), so that the angle between the grinding point of the grinder unit (1) and the rotation axis of the grinder unit (1) and the movement direction of the traverse arm (3) is always greater than 90° and less than 1° 80°; The grinding trolley (7) includes a trolley, the trolley is set on the track (8), and the bottom of the trolley is provided with a tug wheel (9); The tugboat (9) is connected to the trolley through a lifting motor (10), and the lifting motor (10) is a servo motor; The traversing arm (3) includes a traversing motor, a traversing gear, a traversing rack and a transverse arm, the rack is fixedly connected to the transverse arm, the rack meshes with the gear, and the gear is connected to the output end of the motor; The grinding trolley (7) is provided with two idler rollers (4), and the two idler rollers (4) are arranged to rotate in opposite directions, and a placement part for placing a blank tube is formed between the two idler rollers (4). 2. A floating grinding device according to claim 1, characterized in that: the speed of the reciprocating linear motion of the traverse arm (3) is automatically adjusted by a frequency converter.