Steel pipe end face cutting machine

Abstract

The invention relates to the technical field of mechanical cutting, in particular to a steel pipe end face cutting machine which adopts three sets of inner supporting devices for synchronous inner supporting, has an automatic centering function, avoids clamping eccentricity, improves the cutting stability and accuracy, can quickly move in a steel pipe by utilizing a roller device, and improves the cutting efficiency. And the operation convenience is further improved, and great help is provided for steel pipe cutting operation.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical cutting, in particular to a steel pipe end face cutting machine. Background Art

[0002] In industrial production, there are two main types of mechanical cutting structures for steel pipe end faces: external clamping type and internal support type. The external clamping type is a form in which the machine clamps on the outer wall of the steel pipe for cutting, and the internal support type is a form in which the machine supports on the inner wall of the steel pipe for cutting. Among them, the external clamping type steel pipe cutting machine is usually simple and light in structure and is more commonly used.

[0003] However, in some cases, due to the limitation of on-site conditions, the external space of the steel pipe is limited, and it is impossible to set up an external clamping machine. In this case, an internal support machine is more ideal. However, due to mechanical cutting, the resistance and vibration of the machine operation are relatively large. Whether it is an external clamping type or an internal support type, the machine and the steel pipe need to be firmly clamped, which will cause some damage to the surface of the steel pipe. In some occasions, users have requirements for the quality of the outer wall of the steel pipe but not the inner wall. The internal support type has certain advantages over the external clamping type. However, the internal support type steel pipe cutting machine is usually complex and bulky in structure, weighing several tons, which seriously restricts production applications.

[0004] Based on the above reasons, the present invention designs a steel pipe end face cutting machine, which adopts an internal support structure, can quickly and automatically center and support on the inner wall of the steel pipe, and uses metal cutting tools to complete the end face finishing of the steel pipe, including groove processing, with high cutting quality, compact and portable structure, and convenient operation stability and accuracy. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a steel pipe end face cutting machine which adopts an internal support structure, can quickly and automatically center and support the inner wall of the steel pipe to work, and uses metal cutting tools to complete the end face finishing of the steel pipe, including groove processing, with high cutting quality, and a compact and portable structure, which is convenient for operation stability and accuracy.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a steel pipe end face cutting machine, a rotating arm is installed on the outer side of the base, an internal support driving device is installed on the center of the base through an end cover and screws, a retractable movable sleeve is arranged in the base, a guide flat key for linearly guiding the movable sleeve is arranged on the movable sleeve, three groups of internal support devices are connected between the base and the movable sleeve through connecting rods 1 and 2, a tool holder rotation driving device is arranged on the base, a servo motor, a reducer and an eccentric disk on the tool holder rotation driving device are installed on the base through screws, a turntable bearing on the tool holder rotation driving device is installed on the base through screws, a large gear is arranged on the turntable bearing, a cylinder and a rotating arm are arranged on the large gear, a pair of tool holder devices are symmetrically installed on the rotating arm, three sets of symmetrically distributed roller devices B are arranged on the base, and three sets of symmetrically distributed roller devices A are arranged on the bearing on one side of the movable sleeve.

[0007] The inner support device contacts the steel pipe through the expansion shoe, the expansion shoe is arranged on the outside of the expansion shoe seat, one end of the connecting rod one is connected to the expansion shoe seat through a pin shaft, one end of the connecting rod two is connected to the expansion shoe seat through pin two, the connecting rod one and the connecting rod two are connected through pin one, a washer is arranged on the periphery of pin one, and a cotter pin is arranged on pin one.

[0008] The expansion tile is a polyurethane expansion tile.

[0009] A knife feed collision block is arranged on the base, and the knife feed collision block is a triangular collision block matched with the ratchet on the tool holder device.

[0010] Roller device A is a long roller, and roller device B is a short roller.

[0011] A pair of long roller seats on the roller device A are provided with roller shafts, and rollers are provided between the long roller seats. A blocking cover is provided on the side of one of the long roller seats through screw A, a shaft sleeve is provided on the periphery of the roller shaft, a bearing is provided on one side of the shaft sleeve, and a hole retaining ring is provided between the bearing and the shaft sleeve.

[0012] A pair of short roller seats on the roller device B are provided with roller shafts, and rollers are provided between the long roller seats. A blocking cover is provided on the side of one of the long roller seats through a screw A, a shaft sleeve is provided on the periphery of the roller shaft, a bearing is provided on one side of the shaft sleeve, and a hole retaining ring is provided between the bearing and the shaft sleeve.

[0013] The roller device A and the roller device B are equally divided into a circular rhombus.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The invention has a simple and light structure, low cost, and is easy to transport, carry, and install. The inner support device is on the inner wall of the steel pipe, which avoids the situation where the outer space of the steel pipe is limited and cannot be clamped. The expansion shoe of the inner support device is made of polyurethane and other materials, and the steel pipe is not damaged during clamping. At the same time, three sets of inner support devices are used for synchronous inner support, which has the function of automatic centering, avoids eccentric clamping, and improves the stability and accuracy of cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional schematic diagram of the present invention Figure 1 .

[0016] Figure 2 A three-dimensional schematic diagram of the present invention Figure 2 .

[0017] Figure 3 It is a front view of the present invention.

[0018] Figure 4 It is a BB cross-sectional schematic diagram of the present invention.

[0019] Figure 5 It is a CC cross-sectional schematic diagram of the present invention.

[0020] Description of reference numerals: 1 is a steel pipe, 2 is an inner support device, 3 is a tool holder rotation drive device, 4 is an inner support drive device, 5 is a roller device A, 6 is a roller device B, 7 is a tool holder device, 8 is an expansion shoe seat, 9 is an expansion shoe, 10 is a connecting rod one, 11 is a cotter pin, 12 is a pin one, 13 is a washer, 14 is a connecting rod two, 15 is a pin two, 16 is a feed block, 17 is a slider, 18 is a long roller seat, 19 is a roller shaft, 20 is a bushing, 21 is a bearing, 22 is a retaining ring for a hole, 23 is a roller, 24 is a cover, 25 is a screw A, 26 is a short roller seat, 27 is a base, 28 is a swivel arm, 29 is a movable sleeve, and 30 is a guide flat key. DETAILED DESCRIPTION

[0021] The present invention will now be further described with reference to the accompanying drawings.

[0022] See also Figures 1 to 5The present invention provides a steel pipe end face cutting machine, wherein a rotating arm 28 is installed on the outer side of a base 27, an inner support driving device 4 is installed at the center of the base 27 through an end cover and screws, a retractable movable sleeve 29 is arranged inside the base 27, a guide flat key 30 for linearly guiding the movable sleeve 29 is arranged, three groups of inner support devices 2 are connected between the base 27 and the movable sleeve 29 through connecting rods 10 and 2 14, a tool holder rotating driving device 3 is arranged on the base 27, a servo motor, a reducer and an eccentric disk on the tool holder rotating driving device 3 are installed on the base 27 through screws, a turntable bearing on the tool holder rotating driving device 3 is installed on the base 27 through screws, a large gear is arranged on the turntable bearing, a cylinder and a rotating arm 28 are arranged on the large gear, a pair of tool holder devices 7 are symmetrically installed on the rotating arm 28, three sets of symmetrically distributed roller devices B6 are arranged on the base 27, and three sets of symmetrically distributed roller devices A5 are arranged on the bearing on one side of the movable sleeve 29.

[0023] The inner support device 2 contacts the steel pipe 1 through the expansion shoe 9, and the expansion shoe 9 is arranged on the outside of the expansion shoe seat 8. One end of the connecting rod 10 is connected to the expansion shoe seat 8 through a pin shaft, and one end of the connecting rod 2 14 is connected to the expansion shoe seat 8 through a pin 2 15. The connecting rod 10 and the connecting rod 2 14 are connected through a pin 12. A washer 13 is arranged on the periphery of the pin 12, and a cotter pin 11 is arranged on the pin 12.

[0024] The expansion tile 9 is a polyurethane expansion tile.

[0025] A knife feed collision block 16 is provided on the base 27 , and the knife feed collision block 16 is a triangular collision block that matches the ratchet on the tool holder device 7 .

[0026] Roller device A5 is a long roller, and roller device B6 is a short roller.

[0027] A pair of long roller seats 18 on the roller device A5 are provided with roller shafts 19, and rollers 23 are provided between the long roller seats 18. A blocking cover 24 is provided on the side of the long roller seat 18 on one side through a screw A25. A shaft sleeve 20 is provided on the periphery of the roller shaft 19, a bearing 21 is provided on one side of the shaft sleeve 20, and a hole retaining ring 22 is provided between the bearing 21 and the shaft sleeve 20.

[0028] A pair of short roller seats 26 on the roller device B6 are provided with roller shafts 19, and a roller 23 is provided between the long roller seats 18. A blocking cover 24 is provided on the side of the long roller seat 18 on one side through a screw A25. A shaft sleeve 20 is provided on the periphery of the roller shaft 19, a bearing 21 is provided on one side of the shaft sleeve 20, and a hole retaining ring 22 is provided between the bearing 21 and the shaft sleeve 20.

[0029] The roller device A5 and the roller device B6 are equally divided into a rhombus shape.

[0030] Working principle: First, the steel pipe 1 is placed overhead above the ground. Insert the present invention from the end face side of the steel pipe 1 to be processed and adjust the left and right positions. Start the servo motor of the inner support drive device 4 so that the expansion shoe 9 of the three sets of inner support devices 2 can be reliably supported on the inner wall of the steel pipe 1. Adjust the turning tool position of the tool holder device 7. Start the servo motor of the tool holder rotation drive device 3, and the rotating arm 28 automatically rotates around the steel pipe 1 with the tool holder device 7 to perform cutting processing. Every time the rotating arm 28 rotates one circle, the tool holder device 7 collides with the feed block 16 once to realize the feed, and the processing is completed when the end face of the steel pipe is completely cut.

[0031] The above are only preferred embodiments of the present invention, which are only used to help understand the method and core ideas of the present application. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

[0032] The present invention solves the shortcomings of the prior art's external clamping and internal support type steel pipe cutting machines, such as high difficulty in installation, complex and bulky structure, poor cutting accuracy and stability caused by unstable clamping, etc. By adopting three sets of internal support devices for synchronous internal support, it has the function of automatic centering, avoids eccentric clamping, and improves cutting stability and accuracy. At the same time, it utilizes a roller device to move quickly inside the steel pipe, further improving the convenience of operation, which provides great help for steel pipe cutting operations.

Claims

1. A steel pipe end cutting machine, characterized in that: A rotating arm (28) is installed on the outer side of the base (27); an internal support driving device (4) is installed in the center of the base (27) through an end cover and screws; a retractable movable sleeve (29) is arranged in the base (27); a guide flat key (30) for linearly guiding the movable sleeve (29) is arranged on the movable sleeve (29); three sets of internal support devices (2) are connected between the base (27) and the movable sleeve (29) through a connecting rod 1 (10) and a connecting rod 2 (14); a tool holder rotation driving device (3) is arranged on the base (27); the tool holder rotation driving device (3) is arranged on the base (27); The servo motor, reducer and eccentric disk on the tool holder (3) are mounted on the base (27) by screws, the turntable bearing on the tool holder rotation drive device (3) is mounted on the base (27) by screws, a large gear is arranged on the turntable bearing, a cylinder and a rotating arm (28) are arranged on the large gear, a pair of tool holder devices (7) are symmetrically mounted on the rotating arm (28), three sets of symmetrically distributed roller devices B (6) are arranged on the base (27), and three sets of symmetrically distributed roller devices A (5) are arranged on the bearing on one side of the movable sleeve (29).

2. The steel pipe end face cutting machine according to claim 1, characterized in that: The inner support device (2) contacts the steel pipe (1) via an expansion shoe (9), the expansion shoe (9) is arranged on the outside of the expansion shoe seat (8), one end of the connecting rod 1 (10) is connected to the expansion shoe seat (8) via a pin shaft, one end of the connecting rod 2 (14) is connected to the expansion shoe seat (8) via a pin 2 (15), the connecting rod 1 (10) and the connecting rod 2 (14) are connected via a pin 1 (12), a washer (13) is arranged on the periphery of the pin 1 (12), and a cotter pin (11) is arranged on the pin 1 (12).

3. The steel pipe end face cutting machine according to claim 2, characterized in that: The expansion tile (9) is a polyurethane expansion tile.

4. The steel pipe end face cutting machine according to claim 1, characterized in that: A knife feed collision block (16) is arranged on the base (27), and the knife feed collision block (16) is a triangular collision block that matches the ratchet on the tool holder device (7).

5. The steel pipe end face cutting machine according to claim 1, characterized in that: The roller device A (5) is a long roller, and the roller device B (6) is a short roller.

6. The steel pipe end face cutting machine according to claim 5, characterized in that: A pair of long roller seats (18) on the roller device A (5) are provided with roller shafts (19), a roller (23) is provided between the long roller seats (18), a retaining cover (24) is provided on the side of one of the long roller seats (18) via a screw A (25), a shaft sleeve (20) is provided on the periphery of the roller shaft (19), a bearing (21) is provided on one side of the shaft sleeve (20), and a hole retaining ring (22) is provided between the bearing (21) and the shaft sleeve (20).

7. The steel pipe end face cutting machine according to claim 5, characterized in that: A pair of short roller seats (26) on the roller device B (6) are provided with roller shafts (19), a roller (23) is provided between the long roller seats (18), a retaining cover (24) is provided on the side of one of the long roller seats (18) via a screw A (25), a shaft sleeve (20) is provided on the periphery of the roller shaft (19), a bearing (21) is provided on one side of the shaft sleeve (20), and a hole retaining ring (22) is provided between the bearing (21) and the shaft sleeve (20).

8. The steel pipe end face cutting machine according to claim 5, characterized in that: The roller device A (5) and the roller device B (6) are equally divided into a circular rhombus.

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