Pipe end groove root face flatness dressing device and method

Abstract

The application provides a pipe end bevel edge flatness dressing device and method, the dressing device comprises an angle grinder, a base, a support column and an angle grinder support, the angle grinder is installed on the upper end of the angle grinder support, the support column is fixedly connected with the base, a dressing feed amount regulator is arranged on the top of the support column, one end of the dressing feed amount regulator is hingedly connected with the upper part of the angle grinder support, the lower part of the angle grinder support is connected with the support column through a transition piece, the transition piece is fixedly connected with the support column, and the angle grinder support is hingedly connected with the transition piece. The angle grinder is fixed through the angle grinder support, the manual dressing mode is replaced, and the mechanical injury risk of personnel holding the angle grinder is eliminated. The position and the angle of the angle grinder can be respectively adjusted through the dressing feed amount regulator and an angle adjusting knob, the grinding depth is ensured to be consistent, the steel pipe end cutting inclination is eliminated, and it is ensured that the machining of each geometric dimension of the steel pipe end meets the process requirements.

Description

Technical Field

[0001] This invention belongs to the technical field of spiral welded pipe ultra-large diameter pipe end processing equipment, specifically relating to a device and method for grinding the flatness of the bevel edge of the pipe end. Background Technology

[0002] In recent years, many new construction projects have frequently required the use of ultra-large diameter pipes. The existing method of manual grinding with handheld angle grinders during the production of ultra-large diameter steel pipes is not only labor-intensive and carries a risk of mechanical injury, but also has the following drawbacks in the flame cutting of pipe end bevels and blunt edges: ① Inconsistent blunt edge dimensions have long been observed, making it difficult to guarantee grinding quality and failing to meet the technical requirements of the construction site and users; ② Directly processing a pure bevel with a flame and then manually grinding the blunt edge with an angle grinder results in inconsistent grinding depths, causing two problems: inconsistent blunt edges at the pipe ends and localized slant cutting.

[0003] Therefore, in order to effectively improve the ability of flame flat cutting and flat-end machining of pipe ends, it is urgent to solve the problems of inconsistent grinding depth and local oblique cutting of pipe ends. Summary of the Invention

[0004] The purpose of this invention is to provide a device for grinding the blunt edge flatness of pipe end bevels, overcoming the aforementioned technical problems existing in the prior art.

[0005] Another objective of this invention is to provide a method for grinding the blunt edge flatness of the pipe end bevel, which grinds the blunt edge of the steel pipe end so that the bevel of the steel pipe end after flame cutting has a blunt edge, while eliminating the cutting deviation of the steel pipe end, and ensuring that the various geometric dimensions of the steel pipe end processing meet the process requirements.

[0006] Therefore, the technical solution provided by the present invention is as follows: A device for grinding the blunt edge flatness of pipe end bevels includes an angle grinder, a base, a support column, and an angle grinder bracket. The angle grinder is mounted on the upper end of the angle grinder bracket. The support column is fixedly connected to the base. A grinding feed adjuster is provided at the top of the support column. One end of the grinding feed adjuster is hinged to the upper part of the angle grinder bracket. The lower part of the angle grinder bracket is connected to the support column through a transition piece. The transition piece is fixedly connected to the support column, and the angle grinder bracket is hinged to the transition piece.

[0007] The angle grinder bracket includes a main frame, a first connecting plate, a positioning plate, a second connecting plate, and a third connecting plate; The main frame consists of two L-shaped plates arranged side by side. The support column is located between the two L-shaped plates. Transition pieces are fixed to both sides of the support column. One end of each of the two L-shaped plates is hinged to the transition piece. The positioning plate, connecting plate one, and connecting plate two are arranged sequentially from bottom to top on the other side of the two L-shaped plates. The positioning plate is located closer to the support column, and the connecting plate one is located away from the support column. There are two connecting plates three, which are fixed to the top of the two L-shaped plates respectively. The upper part of the angle grinder is connected to the main frame by screws passing through the connecting plate three. The lower part of the angle grinder is located in the space between the positioning plate and the connecting plate one. An angle adjustment knob is installed on the positioning plate. One end of the angle adjustment knob contacts the lower part of the angle grinder. The connecting plate two is hinged to the grinding feed adjuster.

[0008] The grinding feed regulator includes an adjusting screw, an adjusting handwheel, a screw nut, and an adjusting screw seat. The screw nut is fixed to the adjusting screw seat and sleeved on the screw. One end of the screw is the adjusting handwheel, and the other end of the screw is connected to a hinge. The screw is hinged to the angle grinder bracket through the hinge.

[0009] The angle grinder has a grinding wheel protective cover on its outside.

[0010] One side of the transition piece is semi-circular, matching the support column. Both one end of the transition piece and one end of the main frame have through holes. The main frame and the transition piece are connected by a pin.

[0011] The angle grinder is provided with an iron powder collection and guide channel on one side below, and the iron powder collection and guide channel is connected to the connecting plate of the grinding bracket.

[0012] The base is a magnetic lifter, and a connecting plate is fixed on the magnetic lifter. The angle grinder bracket is fixed in the middle of the connecting plate.

[0013] The iron powder collection and diversion channel includes a slope one and a slope two connected in sequence. The angle between the slope one and the horizontal is greater than that between the slope one and the horizontal. The width of the slope two gradually decreases. The front end of the slope two is the slot opening, where the width is the smallest.

[0014] A method for grinding the blunt edge flatness of pipe end bevels involves using a pipe end bevel flatness grinding device. The steel pipe to be ground is rotated, and an angle grinder is turned on. The feed rate of the angle grinder is adjusted according to the size and position of the steel pipe, and the grinding angle is adjusted by the angle adjustment knob on the angle grinder support. This allows the angle grinder to contact the bevel of the steel pipe end, thereby achieving the flatness grinding of the steel pipe.

[0015] The process of adjusting the feed rate of the angle grinder using the grinding feed rate regulator is as follows: Rotate the adjusting handwheel to make the adjusting screw rotate relative to the hinge, and pull or push the angle grinder stand to make the lower part of the angle grinder stand rotate, thereby adjusting the angle grinder's forward and backward movement.

[0016] The beneficial effects of this invention are: The pipe end bevel smoothness grinding device provided by this invention uses an angle grinder bracket to fix the angle grinder, replacing the existing manual grinding method and eliminating the risk of mechanical injury from personnel handling the angle grinder by hand. The position and angle of the angle grinder can be adjusted separately via the grinding feed adjuster and angle adjustment knob to ensure consistent grinding depth. This results in a bevel with a blunt edge after flame cutting of the steel pipe end, while simultaneously eliminating the amount of beveling at the pipe end, ensuring that all geometric dimensions of the processed steel pipe end meet the process requirements.

[0017] This flatness grinding device employs a magnetic lifter with strong adsorption properties, effectively stabilizing the grinding device and ensuring a stable and reliable grinding process. It also allows for skid-mounted movement. The support column and angle grinder bracket are hinged, resulting in minimal mechanical clearance and meeting the stability requirements of the angle grinder under various working conditions. The grinding feed adjuster, via a hinge and an adjusting screw seat fixed to the top of the support column, maintains minimal mechanical clearance. The grinding feed is adjusted via a handwheel, offering high precision and requiring minimal effort.

[0018] This invention adds a grinding wheel guard to the original angle grinder safety guard. During grinding, the grinding wheel guard blocks sparks and guides iron filings downwards, preventing sparks and iron powder from splashing to the sides and upwards, thus preventing iron powder pollution of the surrounding environment. The double-slope structure of the iron powder collection and guiding channel prevents secondary splashing and concentrates the iron filings, collecting them in a designated location and housing.

[0019] The following will provide a more detailed explanation in conjunction with the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of one embodiment of the present invention; Figure 2 This is a schematic diagram of one embodiment of an angle grinder support; Figure 3 This is a schematic diagram of one implementation of an iron powder collection and diversion channel.

[0021] In the diagram: 1. Magnetic lifter; 2. Connecting plate; 3. Support column; 4. Angle grinder; 5. Angle grinder bracket; 5-1. Connecting plate one; 5-2. Positioning plate; 5-3. Angle adjustment knob; 5-4. Connecting plate two; 5-5. Connecting plate three; 5-6. Main frame; 5-7. Screw; 5-8. Pin; 5-9. Through hole; 6. Grinding feed regulator; 6-1. Hinge; 6-2. Adjusting screw seat; 6-3. Adjusting handwheel; 6-4. Adjusting screw; 6-5. Nut; 7. Iron powder collection guide channel; 7-1. Slope one; 7-2. Slope two; 8. Grinding wheel protective cover; 9. Transition piece; 10. Steel pipe. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0023] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0024] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0025] Example 1: This embodiment provides a device for grinding the blunt edge flatness of pipe end bevels, including an angle grinder 4, a base, a support column 3, and an angle grinder bracket 5. The angle grinder 4 is installed on the upper end of the angle grinder bracket 5. The support column 3 is fixedly connected to the base. A grinding feed adjuster 6 is provided on the top of the support column 3. One end of the grinding feed adjuster 6 is hinged to the upper part of the angle grinder bracket 5. The lower part of the angle grinder bracket 5 is connected to the support column 3 through a transition piece 9. The transition piece 9 is fixedly connected to the support column 3, and the angle grinder bracket 5 is hinged to the transition piece 9.

[0026] Working principle: Before the grinding work begins, steel pipe 10 starts rotating. Angle grinder 4 is manually turned on using its switch. Then, the grinding disc of angle grinder 4 is moved forward slightly by the grinding feed regulator 6 until it contacts the bevel of the steel pipe 10, and the grinding work begins. After the grinding work is completed, the grinding feed regulator 6 is adjusted to move the grinding disc backward slightly until the grinding work is finished, and then the rotation of steel pipe 10 is stopped. When the next steel pipe 10 is in place, angle grinder 4 is started, and the feed rate is adjusted by the grinding feed regulator 6. The roller conveyor runs, steel pipe 10 rotates, and the grinding work restarts. Throughout the grinding process, the position of angle grinder 4 can be adjusted according to the grinding position of the pipe end bevel to achieve the grinding of the steel pipe 10 bevel and meet the requirements for blunt edge flatness.

[0027] The pipe end bevel smoothness grinding device provided by this invention fixes the angle grinder 4 with the angle grinder bracket 5, replacing the existing manual grinding method and eliminating the risk of mechanical injury from personnel handling the angle grinder 4. The position and angle of the angle grinder 4 are adjusted by the grinding feed adjuster 6 and the angle adjustment knobs 5-3 of the angle grinder bracket 5, ensuring consistent grinding depth. This results in a bevel with a blunt edge after flame cutting of the steel pipe 10, while eliminating the beveling amount at the pipe end of the steel pipe 10, ensuring that all geometric dimensions of the processed steel pipe 10 meet the process requirements.

[0028] Example 2: Based on Example 1, this example provides a device for grinding the blunt edge flatness of pipe end bevels, such as... Figure 2 As shown, the angle grinder bracket 5 includes a main frame 5-6, a connecting plate 1 5-1, a positioning plate 5-2, a connecting plate 2 5-4, and a connecting plate 3 5-5; The main frame 5-6 consists of two L-shaped plates arranged side by side. The support column 3 is located between the two L-shaped plates. Transition pieces 9 are fixed to both sides of the support column 3. One end of each of the two L-shaped plates is hinged to the transition piece 9. The positioning plate 5-2, connecting plate 5-1, and connecting plate 5-4 are arranged sequentially from bottom to top on the other side of the two L-shaped plates. The positioning plate 5-2 is located closer to the support column 3, and the connecting plate 5-1 is located away from the support column 3. There are two connecting plates 5-5, which are fixed to the top of the two L-shaped plates respectively. The upper part of the angle grinder 4 is connected to the main frame 5-6 by screws 5-7 passing through the connecting plates 5-5. The lower part of the angle grinder 4 is located in the space between the positioning plate 5-2 and the connecting plate 5-1. An angle adjustment knob 5-3 is installed on the positioning plate 5-2. One end of the angle adjustment knob 5-3 contacts the lower part of the angle grinder 4. The connecting plate 5-4 is hinged to the grinding feed adjuster 6.

[0029] The angle grinder bracket 5 is the core part of the tube end bevel blunt edge flatness grinding device. The two main frames 5-6 on the left and right are welded together by the positioning plate 5-2, the connecting plate one 5-1 and the connecting plate two 5-4. At the same time, the main frame 5-6 is also connected to the transition piece 9 by the pin 5-8. The transition piece 9 is welded to the bracket column 3. Meanwhile, the main frame 5-6 is connected to the angle grinder 4 by the connecting plate three 5-5 and fixed by the screw 5-7.

[0030] The support column 3 and the angle grinder bracket 5 are hinged together, with a small mechanical clearance, which meets the stability requirements of the angle grinder 4 under various working conditions.

[0031] Since the main frame 5-6 is hinged to the transition piece 9, and the grinding feed adjuster 6 is hinged to the connecting plate 5-4, when the grinding feed adjuster 6 drives the angle grinder support 5 to move, the lower part of the angle grinder support 5 will rotate, and the upper part of the angle grinder support 5 will also twist appropriately, thereby adjusting the distance between the angle grinder 4 and the steel pipe 10; when it is necessary to adjust the grinding angle of the angle grinder 4, the angle can be adjusted by rotating the angle adjustment knob 5-3.

[0032] Example 3: Based on Embodiment 1, this embodiment provides a device for grinding the flatness of the blunt edge of a pipe end bevel. The grinding feed adjuster 6 includes an adjusting screw 6-4, an adjusting handwheel 6-3, a screw nut 6-5, and an adjusting screw seat 6-2. The screw nut 6-5 is fixed to the adjusting screw seat 6-2 and sleeved on the screw. One end of the screw is the adjusting handwheel 6-3, and the other end of the screw is connected to a hinge 6-1. The screw is hinged to the angle grinder bracket 5 through the hinge 6-1.

[0033] like Figure 1 As shown, rotating the adjusting handwheel 6-3 causes the adjusting screw 6-4 to rotate relative to the hinge 6-1. Since the screw nut 6-5 is fixed on the adjusting screw seat 6-2, and the adjusting screw seat 6-2 is fixed on the top of the support column 3, the screw nut 6-5 remains stationary, while the screw makes a linear reciprocating motion. This, in turn, pulls or pushes the angle grinder support 5 through the connecting plate 2 5-4, causing the lower part of the angle grinder support 5 to rotate, thereby adjusting the grinding advance and retraction of the angle grinder 4.

[0034] The grinding feed regulator 6, through the hinge 6-1 and the adjusting screw seat 6-2 fixed on the top of the support column 3, ensures a small mechanical clearance. The grinding feed is adjusted by the handwheel 6-3, which is both accurate and labor-saving.

[0035] Example 4: Based on Example 1, this example provides a device for grinding the flatness of the blunt edge of the pipe end bevel, wherein the grinding wheel of the angle grinder 4 is provided with a grinding wheel protective cover 8.

[0036] like Figure 1 As shown, in this embodiment, a grinding wheel guard is added to the original angle grinder 4 safety guard. During the grinding process, the grinding wheel guard blocks the sparks and guides the iron powder downwards, preventing the sparks and iron powder from the grinding wheel from splashing to the side and upwards, thus preventing the iron powder from polluting the surrounding environment.

[0037] Example 5: Based on Embodiment 1, this embodiment provides a device for grinding the flatness of the bevel edge of a pipe end. One side of the transition piece 9 is semi-circular and matches the support column 3. One end of the transition piece 9 and one end of the main frame 5-6 are both provided with through holes 5-9. The main frame 5-6 and the transition piece 9 are connected by a pin 5-8.

[0038] like Figure 1 As shown, one side of the transition piece 9 is semi-circular and welded to the support column 3, while the other side is straight. The pin 5-8 passes through the central hole 5-9, connecting the main frame 5-6 and the transition piece 9. When the grinding feed adjuster 6 drives the angle grinder support 5 to move, the lower part of the angle grinder support 5 will rotate around the pin 5-8 as the rotation axis.

[0039] Example 6: Based on Embodiment 1, this embodiment provides a device for grinding the flatness of the blunt edge of the pipe end bevel. An iron powder collection and guiding groove 7 is provided on one side below the angle grinder 4. The iron powder collection and guiding groove 7 is connected to the connecting plate 5-1 of the grinding bracket.

[0040] like Figure 1 As shown, the iron powder collection and diversion channel 7 is connected to the connecting plate 5-1 of the grinding bracket. The iron powder is collected and diverted through the iron powder collection and diversion channel 7 and collected in the designated location and box.

[0041] Example 7: Based on Embodiment 1, this embodiment provides a device for grinding the flatness of the blunt edge of the pipe end bevel. The base is a magnetic lifter 1, and a connecting plate 2 is fixed on the magnetic lifter 1. The angle grinder bracket 5 is fixed in the middle of the connecting plate 2.

[0042] like Figure 1 As shown, the magnetic lifter 1 is connected to the connecting plate 2 by four bolts, and the support column 3 is welded to the middle part of the connecting plate 2. The magnetic lifter 1 uses its own magnetic force to firmly fix the grinding device to the ground with the steel plate, providing stable conditions for the grinding machine and grinding work. After starting the angle grinder 4, the bevel of the steel pipe 10 is ground, thereby realizing the processing of the bevel blunt edge and the elimination of the pipe end beveling.

[0043] When it is necessary to repair and grind steel pipes 10 on other production lines, the magnetic field lines can be changed by flipping the handle to put the lifting device in the closed state. At this time, the grinding device can be moved, which is convenient and effectively gives full play to the functional advantages of the skid-mounted grinding machine.

[0044] Example 8: Based on Example 6, this example provides a device for grinding the flatness of the blunt edge of the pipe end bevel. The iron powder collection and guide channel 7 includes a slope 1 7-1 and a slope 2 7-2 connected in sequence. The angle between the slope 1 7-1 and the horizontal is greater than that between the slope 2 7-2 and the horizontal. The width of the slope 2 7-2 gradually decreases. The front end of the slope 2 7-2 is a groove, and the width of the groove is the smallest.

[0045] like Figure 3 As shown, in order to receive the grinding iron powder, slope 1 7-1 is connected to connecting plate 1 5-1, and the slope of slope 1 7-1 is greater than that of slope 2 7-2. The iron powder slides quickly from slope 1 7-1 into slope 2 7-2, which slows down the iron powder and prevents it from splashing out too fast.

[0046] Example 9: This embodiment provides a method for grinding the blunt edge flatness of pipe end bevels. A pipe end bevel flatness grinding device is used. The steel pipe 10 to be ground is rotated, and the angle grinder 4 is turned on. Based on the size and position of the steel pipe 10, the feed rate of the angle grinder 4 is adjusted via the grinding feed rate adjuster 6, and the grinding angle of the angle grinder 4 is adjusted via the angle adjustment knobs 5-3 on the angle grinder bracket 5. This brings the angle grinder 4 into contact with the bevel of the steel pipe 10, thereby achieving the flatness grinding of the steel pipe 10.

[0047] The process of adjusting the feed rate of the angle grinder 4 using the grinding feed rate regulator 6 is as follows: Rotate the adjusting handwheel 6-3 to make the adjusting screw 6-4 rotate relative to the movable joint 6-1, and pull or push the angle grinder bracket 5 to make the lower part of the angle grinder bracket 5 rotate, thereby adjusting the forward and backward movement of the angle grinder 4.

[0048] This invention replaces the original manual grinding method, eliminating the risk of mechanical injury from personnel operating the angle grinder 4 by hand. The feed rate adjuster 6 and the angle adjustment knobs 5-3 adjust the feed rate and angle of the angle grinder 4 respectively, ensuring consistent grinding depth. This results in the bevel of the flame-cut steel pipe 10 having a blunt edge, while eliminating the beveling at the end of the steel pipe 10, ensuring that all geometric dimensions of the steel pipe 10 end meet the process requirements.

[0049] The above examples are merely illustrative of the present invention and do not constitute a limitation on the scope of protection of the present invention. All designs that are the same as or similar to the present invention are within the scope of protection of the present invention.

Claims

1. A device for grinding the blunt edge flatness of a pipe end bevel, comprising an angle grinder, characterized in that: It also includes a base, a support column, and an angle grinder bracket. The angle grinder is mounted on the upper end of the angle grinder bracket. The support column is fixedly connected to the base. A grinding feed adjuster is provided on the top of the support column. One end of the grinding feed adjuster is hinged to the upper part of the angle grinder bracket. The lower part of the angle grinder bracket is connected to the support column through a transition piece. The transition piece is fixedly connected to the support column, and the angle grinder bracket is hinged to the transition piece. The angle grinder bracket includes a main frame, a first connecting plate, a positioning plate, a second connecting plate, and a third connecting plate; The main frame consists of two L-shaped plates arranged side by side. The support column is located between the two L-shaped plates. Transition pieces are fixed to both sides of the support column. One end of each of the two L-shaped plates is hinged to the transition piece. The positioning plate, connecting plate one, and connecting plate two are arranged sequentially from bottom to top on the other side of the two L-shaped plates. The positioning plate is located closer to the support column, and the connecting plate one is located away from the support column. There are two connecting plates three, which are fixed to the top of the two L-shaped plates respectively. The upper part of the angle grinder is connected to the main frame by screws passing through the connecting plate three. The lower part of the angle grinder is located in the space between the positioning plate and the connecting plate one. An angle adjustment knob is installed on the positioning plate. One end of the angle adjustment knob contacts the lower part of the angle grinder. The connecting plate two is hinged to the grinding feed adjuster. The grinding feed regulator includes an adjusting screw, an adjusting handwheel, a screw nut, and an adjusting screw seat. The screw nut is fixed to the adjusting screw seat and sleeved on the screw. One end of the screw is the adjusting handwheel, and the other end of the screw is connected to a hinge. The screw is hinged to the angle grinder bracket through the hinge.

2. The device for grinding the blunt edge flatness of pipe end bevels according to claim 1, characterized in that: The angle grinder has a grinding wheel protective cover on its outside.

3. The device for grinding the blunt edge flatness of pipe end bevels according to claim 1, characterized in that: One side of the transition piece is semi-circular, matching the support column. Both one end of the transition piece and one end of the main frame have through holes. The main frame and the transition piece are connected by a pin.

4. The device for grinding the blunt edge flatness of pipe end bevels according to claim 1, characterized in that: The angle grinder is provided with an iron powder collection and guide channel on one side below, and the iron powder collection and guide channel is connected to the connecting plate of the grinding bracket.

5. The device for grinding the blunt edge flatness of pipe end bevels according to claim 1, characterized in that: The base is a magnetic lifter, and a connecting plate is fixed on the magnetic lifter. The angle grinder bracket is fixed in the middle of the connecting plate.

6. The device for grinding the blunt edge flatness of pipe end bevels according to claim 4, characterized in that: The iron powder collection and diversion channel includes a slope one and a slope two connected in sequence. The angle between the slope one and the horizontal is greater than that between the slope one and the horizontal. The width of the slope two gradually decreases. The front end of the slope two is the slot opening, where the width is the smallest.

7. A method for grinding the blunt edge smoothness of a pipe end bevel, using the pipe end bevel blunt edge smoothness grinding device according to any one of claims 1 to 6, characterized in that: Rotate the steel pipe to be ground, turn on the angle grinder, and adjust the feed rate of the angle grinder according to the size and position of the steel pipe. Adjust the grinding angle of the angle grinder by adjusting the feed rate regulator and the angle adjustment knob on the angle grinder stand to make the angle grinder contact the bevel of the steel pipe end, thereby achieving the flatness grinding of the steel pipe.

8. The method for grinding the blunt edge flatness of a pipe end bevel according to claim 7, characterized in that: The process of adjusting the feed rate of the angle grinder using the grinding feed rate regulator is as follows: Rotate the adjusting handwheel to make the adjusting screw rotate relative to the hinge, and pull or push the angle grinder stand to make the lower part of the angle grinder stand rotate, thereby adjusting the angle grinder's forward and backward movement.

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