Steel strip rolling and chamfering machine and steel strip rolling and chamfering process

Abstract

The present invention provides a steel strip rolling and chamfering machine, comprising a machine base, two groups of rolling and chamfering mechanisms both mounted on the machine base and arranged symmetrically along the width direction of the steel strip, each group of rolling and chamfering mechanisms comprising a main shaft extending up and down along the thickness direction of the steel strip, a bearing sleeve rotatably mounted on the outer periphery of the main shaft through a bearing, and a pair of scissors and a guide roller both fixed on the outer periphery of the bearing sleeve, the scissors and the guide rollers are both disc-shaped and arranged up and down, a guide portion is provided at the outer edge of the guide roller, the guide portion extends in an inclined manner inwardly as it approaches the scissors, and a rolling and chamfering area for accommodating the edge of the steel strip is formed between the guide portion and the scissors. The present application can continuously roll and chamfer the edge of the steel strip, and the rolling and cutting speed can meet the requirements of the high-frequency welding speed, so that extremely thick-walled steel pipes and corner-welded square pipes can use high-frequency welding technology, improve the quality and efficiency of the weld, and be beneficial to the development of products.

Description

Technical Field

[0001] The invention relates to the production field of high-frequency welded pipes and cold-bent square pipes, and in particular to a steel strip rolling and chamfering machine and a steel strip rolling and chamfering process using the steel strip rolling and chamfering machine. Background Art

[0002] When producing extremely thick steel pipes or special cross-section cold-bent high-frequency welded products on high-frequency welded pipe production lines and cold-bent square and rectangular pipe production lines, it is necessary to continuously and accurately chamfer the two edges of the steel strip at a certain angle before forming and welding to ensure the welding quality of the product. At present, there are only planing and milling processes in the prior art; however, due to the large thickness of the steel strip and the difficulty in welding, chamfering is required; and the feed amount and processing speed of the planing and milling processes are far from meeting the requirements of the steel strip chamfering. In addition, the fastest speed of the planing and milling processes is 2 to 7 meters per minute, while the high-frequency welding speed is generally 15 meters per minute, so the speed of the planing and milling processes cannot meet the requirements of the high-frequency welding speed. This speed restriction also leads to the inability to use high-frequency welding processes for extremely thick-walled steel pipes and corner-welded square pipes, thereby restricting the innovation and development in this field. In addition, when some cutting equipment in the prior art performs rolling cutting on metal sheets, it can only achieve a 90° angle between the shear end face and the plate surface of the metal sheet, and cannot be used for the shear angle requirements when the steel strip is chamfered. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a steel strip rolling and chamfering machine, which can realize rolling and chamfering and can also meet the requirements of high-frequency welding speed.

[0004] To achieve the above-mentioned purpose, the present invention provides a steel strip rolling and chamfering machine, comprising a machine base, two groups of rolling and cutting mechanisms both installed on the machine base and arranged symmetrically along the width direction of the steel strip, each group of rolling and cutting mechanisms comprising a main shaft extending up and down along the thickness direction of the steel strip, a bearing sleeve rotatably installed on the outer periphery of the main shaft through a bearing, and a scissors and a guide roller both fixed on the outer periphery of the bearing sleeve, the scissors and the guide rollers are both disc-shaped and arranged up and down, a guide portion is provided at the outer edge of the guide roller, the guide portion is inclined and extends inwardly in a manner that the closer it is to the scissors, the more rolling and cutting area for accommodating the edge of the steel strip is formed between the guide portion and the scissors.

[0005] Furthermore, each set of rolling cutting mechanisms also includes a sliding seat and an adjusting component acting on the sliding seat. A sliding groove extending left and right is opened in the machine seat. The sliding seat is movably installed in the sliding groove. The main shaft is connected to the sliding seat.

[0006] Furthermore, the adjustment assembly includes an adjustment screw rod extending axially to the left and right, and a nut threadably matched with the adjustment screw rod, the nut is fixed in the machine base, and the end of the adjustment screw rod is rotatably supported in the sliding seat.

[0007] Furthermore, the main shaft is threadably matched with the sliding seat.

[0008] Furthermore, the sliding seat is L-shaped, and has a horizontally extending seat body portion and a seat arm portion extending vertically upward from the seat body portion. The lower section of the main shaft is a threaded section, and the threaded section is threadedly connected to the seat body portion, and the adjustment assembly is connected to the seat arm portion.

[0009] Furthermore, each set of rolling cutting mechanisms also includes a support arm fixed to the upper end of the seat arm portion, a support hole is provided in the support arm, and the main shaft is clearance-matched with the support hole.

[0010] Furthermore, the upper end of the main shaft has a rotation operating portion located above the support arm.

[0011] Furthermore, a locking nut is threadedly connected to the outer periphery of the bearing sleeve, and a lower end surface of the locking nut is abutted and matched with the scissors.

[0012] Furthermore, the bearing sleeve and the scissors, and the guide roller and the scissors are all connected by keys.

[0013] Furthermore, the central axis of the main shaft forms an angle α with the vertical line, and the angle α is 2° to 5°.

[0014] Furthermore, the present application also provides a steel strip rolling and chamfering process, using the steel strip rolling and chamfering machine as described above, the steel strip rolling and chamfering machine is arranged between two successive deformation rollers in a cold bending unit; the steel strip rolling and chamfering process comprises the following steps:

[0015] S1. The cold bending unit drives the steel strip to move, and the multiple deformation rollers in the cold bending unit bend the edges of the steel strip so that the left and right sides of the steel strip have edges of the steel strip that form an acute angle with the steel strip;

[0016] S2. The steel strip passes through the rolling cutting area of ​​the steel strip rolling and chamfering machine. The scissors and guide rollers in the steel strip rolling and chamfering machine clamp the edge of the steel strip in the rolling cutting area. The friction between the edge of the steel strip and the scissors, and between the edge of the steel strip and the guide rollers drives the scissors and the guide rollers to rotate around the central axis of the main shaft. When the scissors rotate, they are equivalent to rolling on the material edge at the upper end of the edge of the steel strip, rolling off the material edge at the upper end of the edge of the steel strip, and processing the chamfer on the edge of the steel strip.

[0017] As described above, the steel strip rolling and chamfering machine and the steel strip rolling and chamfering process according to the present invention have the following beneficial effects:

[0018] The present application clamps the edge of the steel strip in the rolling cutting area by means of scissors and guide rollers. When the steel strip moves along its own length direction and passes through the rolling cutting area, the friction between the edge of the steel strip and the scissors, and between the edge of the steel strip and the guide rollers drives the scissors and the guide rollers to rotate around the central axis of the main shaft. When the scissors rotate, they are equivalent to rolling on the edge of the steel strip, thereby cutting into the edge of the steel strip, rolling off the edge of the steel strip, and then processing the chamfer on the edge of the steel strip. Therefore, the present application can continuously roll the edge of the steel strip and continuously process the chamfer of the edge of the steel strip. The rolling speed is much higher than the general planing and milling processing technology. The rolling speed of the present application can meet the requirements of high-frequency welding speed, so that extremely thick-walled steel pipes and corner-welded square pipes can use high-frequency welding technology, improve the quality and efficiency of the weld, and be beneficial to the development of products. In particular, the present application only requires one pair of scissors on one side of the edge of the steel strip during rolling shearing and chamfering, and achieves shearing at a certain angle of less than 90 degrees between the shearing surface and the surface of the steel strip, meeting the shearing angle requirements during chamfering of the steel strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the steel strip rolling and chamfering machine in this application, which is the main view.

[0020] Figure 2 for Figure 1 Schematic diagram of the relationship between the scissors and the steel strip, which is a top view.

[0021] Figure 3 for Figure 1 Schematic diagram of the connection between the central spindle, sliding seat, scissors and guide rollers.

[0022] Figure 4 This is a diagram of the bending deformation process of the steel strip in this application.

[0023] Figure 5 This is a state diagram of the steel strip when passing through the rolling and cutting area of ​​the steel strip rolling and beveling machine in this application.

[0024] Component number description

[0025] 1 Base

[0026] 101 Slide slot

[0027] 2 Spindle

[0028] 21 Thread segment

[0029] 22 Rotation operation unit

[0030] 3 Bearings

[0031] 4 Bearing sleeve

[0032] 5. Scissors

[0033] 6 Guide rollers

[0034] 61 Guide

[0035] 7 Rolling area

[0036] 8 Sliding seat

[0037] 81 seat body

[0038] 82 Seat arm

[0039] 9 Adjusting screw

[0040] 10 Thread

[0041] 11 Support arm

[0042] 12 Dust-proof end cap

[0043] 13 Round nut

[0044] 14 Spacer

[0045] 15 Second deformation roller

[0046] 16 The third deformation roller

[0047] 17 Steel belt

[0048] 171 Steel belt edge

[0049] 18 Lock nut DETAILED DESCRIPTION

[0050] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0051] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0052] like Figure 1 and Figure 2As shown, the present application provides a steel strip rolling and chamfering machine for continuously rolling and chamfering a steel strip 17. For the convenience of description, in the following embodiments, the definitions of various directions are as follows: the width direction of the steel strip 17 is defined as the left-right direction, the length direction of the steel strip 17 is defined as the front-back direction, and the thickness direction of the steel strip 17 is defined as the up-down direction. Therefore, Figure 1 In the view shown, the left side and the right side of the paper are the left direction and the right direction respectively, the front side and the back side of the paper are the front direction and the rear direction respectively, and the upper side and the lower side of the paper are the upper direction and the lower direction respectively.

[0053] like Figure 1 and Figure 2 As shown, the steel strip rolling and chamfering machine involved in the present application includes a machine base 1, two groups of rolling and cutting mechanisms both installed on the machine base 1 and arranged symmetrically on the left and right, each group of rolling and cutting mechanisms includes a main shaft 2 extending up and down, a bearing sleeve 4 rotatably installed on the outer periphery of the main shaft 2 through a bearing 3, and a pair of scissors 5 and a guide roller 6 fixed on the outer periphery of the bearing sleeve 4, the scissors 5 and the guide roller 6 are both disc-shaped and arranged up and down, and a guide portion 61 is provided at the outer edge of the guide roller 6, and the guide portion 61 extends inwardly in a manner that the closer it is to the scissors 5, and the upper end of the guide portion 61 extends to the upper end surface of the guide roller 6, and a rolling and cutting area 7 for accommodating the edge 171 of the steel strip is formed between the guide portion 61 and the scissors 5.

[0054] The present application also provides a steel strip rolling and chamfering process, using the steel strip rolling and chamfering machine as above, which is arranged between the first and second deformation rollers in the cold bending machine group. In this embodiment, the cold bending machine group has multiple deformation rollers, and the first three deformation rollers of the multiple deformation rollers are respectively the first deformation roller, the second deformation roller 15 and the third deformation roller 16; Figure 4 As shown, the first deformation roller of the cold bending unit deforms the left and right sides of the steel strip 17 at an angle of about 18°, so that the left and right sides of the steel strip 17 have steel strip edges 171 that form an angle of 18° with the steel strip 17; the second deformation roller 15 of the cold bending unit deforms the left and right sides of the steel strip 17 at an angle of about 36°, so that the left and right sides of the steel strip 17 have steel strip edges 171 that form an angle of 36° with the steel strip 17; the third deformation roller 16 of the cold bending unit deforms the left and right sides of the steel strip 17 at an angle of about 56°, so that the left and right sides of the steel strip 17 have steel strip edges 171 that form an angle of 56° with the steel strip 17. Figure 2 As shown, the steel strip rolling and chamfering machine is arranged at the front end of the cold bending forming production line, between the second bending deformation and the third bending deformation of the steel strip edge 171, that is, the steel strip rolling and chamfering machine is arranged between the second deformation roller 15 and the third deformation roller 16.

[0055] Furthermore, the steel strip rolling and chamfering process involved in the present application includes the following steps: step S1, the steel strip 17 moves forward under the drive of the cold bending machine, and the steel strip 17 passes through the first deformation roller, the second deformation roller 15, the steel strip rolling and chamfering machine, and the third deformation roller 16 of the cold bending machine. The first deformation roller of the cold bending machine deforms the edge 171 of the steel strip to an angle of about 18°, the second deformation roller 15 of the cold bending machine deforms the edge 171 of the steel strip to an angle of about 36°, and the third deformation roller 16 of the cold bending machine deforms the edge 171 of the steel strip to an angle of about 56°; according to the characteristics of continuous deformation of the steel strip 17 during cold bending, the bending angle of the edge 171 of the steel strip at the center line position of the steel strip rolling and chamfering machine is approximately 45°, such as Figure 4 Step S2: When the steel strip 17 passes through the rolling and chamfering area 7 of the steel strip rolling and chamfering machine, Figure 1 and Figure 2 As shown, the scissors 5 and the guide rollers 6 in the steel strip rolling and chamfering machine clamp the steel strip edge 171 in the rolling and cutting area 7, and the outer side of the steel strip edge 171, the upper side and the lower side of the steel strip edge 171 are clamped by the scissors 5 and the guide parts 61 on the guide rollers 6, so as to ensure the stability of the cutting amount of the scissors 5; when the steel strip 17 moves forward along its own length direction and passes through the rolling and cutting area 7, the friction between the steel strip edge 171 and the scissors 5, and between the steel strip edge 171 and the guide rollers 6 drives the scissors 5 and the guide rollers 6 to rotate around the central axis of the main shaft 2, and the scissors 5 are equivalent to rolling on the material edge of the upper end of the steel strip edge 171 when rotating, thereby cutting into the steel strip edge 171, rolling off the material edge of the upper end of the steel strip edge 171, and then processing the chamfer on the steel strip edge 171; the trimming residue on the steel strip edge 171 rolled off by the scissors 5 is in the form of a continuous long strip. In particular, the bending angle of the steel strip edge 171 at the center line position of the steel strip rolling and chamfering machine is 45°, and the scissors 5 are in a horizontal state parallel to the steel strip 17, which means that the scissors 5 and the surface of the steel strip edge 171 are at a 45° angle, which means that the scissors 5 cut into the steel strip edge 171 at a 45° angle, and this angle meets the angle requirement when the steel strip edge 171 is chamfered. Therefore, the present application can continuously roll cut the steel strip edge 171 and continuously process the chamfer of the steel strip edge 171. On the one hand, it realizes the shearing of a certain angle of less than 90 degrees between the shear surface and the steel strip surface, and on the other hand, it realizes that the rolling speed can meet the requirements of the high-frequency welding speed, so that the high-frequency welding process can be used for extremely thick-walled steel pipes and corner-welded square pipes, which improves the quality and efficiency of the weld and is conducive to the development of products.

[0056] Furthermore, the bending deformation of the steel strip edge 171 by multiple deformation rollers of the cold bending unit is a prior art, and reference may be made to a forming process of a partially closed opening cold-bent steel section disclosed in the Chinese invention patent specification with application number 201610725500.0, which will not be described in detail in this specification.

[0057] Furthermore, if Figure 3 As shown, the central axis of the main shaft 2 forms an angle α with the vertical line, and the angle α is 2° to 5°, preferably 3°, so that a cutting angle equal to the angle α, or a blade inclination angle, is naturally formed between the cutting edge of the scissors 5 and the edge 171 of the steel strip, which is beneficial for the cutting edge of the scissors 5 to cut into the edge 171 of the steel strip.

[0058] Furthermore, if Figure 1 As shown, each set of rolling cutting mechanism also includes a sliding seat 8 and an adjustment component acting on the sliding seat 8. A sliding groove 101 extending left and right is opened in the machine base 1. The sliding seat 8 is movably installed in the sliding groove 101. The main shaft 2 is connected to the sliding seat 8. The adjustment component includes an adjustment screw rod 9 extending axially left and right, and a nut 10 threadedly matched with the adjustment screw rod 9. The nut 10 is fixed in the machine base 1, and the end of the adjustment screw rod 9 is rotatably supported in the sliding seat 8. When the adjustment screw rod 9 is rotated, the adjustment screw rod 9 moves left and right, thereby driving the sliding seat 8 to move left and right in the sliding groove 101 of the machine base 1, so as to adjust the distance between the two sliding seats 8, that is, to adjust the distance between the scissors 5 in the two sets of rolling cutting mechanisms, which is suitable for steel strips 17 of different widths.

[0059] Furthermore, the main shaft 2 is threadedly matched with the sliding seat 8; when the main shaft 2 is rotated, the main shaft 2 will move downward relative to the sliding seat 8, and the main shaft 2 will drive the bearing sleeve 4, the scissors 5 and the guide roller 6 to move up or down together, thereby adjusting the height of the scissors 5 and the guide roller 6, that is, adjusting the height of the scissors 5 relative to the steel belt 17 to meet different cutting requirements.

[0060] Furthermore, if Figure 1 As shown, the sliding seat 8 is L-shaped, and the sliding seat 8 has a horizontally extending seat body 81 and a seat arm 82 extending vertically upward from the outer end side of the seat body 81; the lower section of the main shaft 2 is a threaded section 21, and the threaded section 21 is threadedly connected to the seat body 81 to achieve a threaded connection between the main shaft 2 and the sliding seat 8, which is used to adjust the relative height between the scissors 5 and the steel belt 17; the adjustment screw 9 in the adjustment assembly is connected to the seat arm 82 to achieve the advance and retreat of the sliding seat 8 in the left and right directions. Preferably, the upper end of the main shaft 2 has a rotating operating part 22 located above the support arm 11, and the outer peripheral contour of the rotating operating part 22 is a regular hexagon, which is convenient for rotating the main shaft 2 when adjusting the height. Each set of rolling cutting mechanisms also includes a support arm 11 fixed to the upper end of the seat arm 82, and a support hole is opened in the support arm 11. The main shaft 2 and the support hole are clearance-matched, and the support arm 11 plays the role of supporting the support shaft, thereby improving the structural stability.

[0061] Furthermore, if Figure 1As shown, the upper end of the bearing sleeve 4 is fixedly connected with a dust cover 12, the main shaft 2 is threadedly connected with a round nut 13 located on the upper side of the dust cover 12, and the main shaft 2 is sleeved with a spacer 14 located on the inner circumference of the dust cover 12, and the round nut 13 presses the spacer 14 against the upper end of the inner ring of the bearing 3. The outer circumference of the bearing sleeve 4 is threadedly connected with a locking nut 18, and the lower end surface of the locking nut 18 abuts against the scissors 5, thereby locking the scissors 5 and the guide roller 6. The bearing sleeve 4 and the scissors 5, and the guide roller 6 and the scissors 5 are all keyed.

[0062] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0063] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A steel strip rolling and chamfering process, characterized in that: A steel strip rolling and chamfering machine is used, the steel strip rolling and chamfering machine is arranged between two successive deformation rollers in a cold bending machine group; the steel strip rolling and chamfering machine comprises a machine base (1), two groups of rolling and chamfering mechanisms both mounted on the machine base (1) and arranged symmetrically along the width direction of the steel strip (17), each group of rolling and chamfering mechanisms comprising a main shaft (2) extending up and down along the thickness direction of the steel strip (17), a bearing sleeve (4) rotatably mounted on the outer periphery of the main shaft (2) through a bearing (3), and a pair of scissors (5) and a guide roller (6) both fixed to the outer periphery of the bearing sleeve (4), the scissors (5) and the guide roller (6) both being disc-shaped and arranged up and down, a guide portion (61) being arranged at the outer edge of the guide roller (6), the guide portion (61) extending in an inclined manner inwardly as it approaches the scissors (5), and a rolling and chamfering area (7) for accommodating the edge portion (171) of the steel strip is formed between the guide portion (61) and the scissors (5); The steel strip rolling and chamfering process comprises the following steps: S1, the cold bending unit drives the steel strip (17) to move, and the multiple deformation rollers in the cold bending unit perform angle deformation on the edge of the steel strip (17), so that the left and right sides of the steel strip (17) have steel strip edges (171) that form an acute angle with the steel strip (17); S2, the steel strip (17) passes through the rolling and chamfering area (7) of the steel strip rolling and chamfering machine, the scissors (5) and the guide rollers (6) in the steel strip rolling and chamfering machine clamp the edge (171) of the steel strip in the rolling and chamfering area (7), and the friction between the edge (171) of the steel strip and the scissors (5), and between the edge (171) of the steel strip and the guide rollers (6) drives the scissors (5) and the guide rollers (6) to rotate around the central axis of the main shaft (2), and the scissors (5) when rotating are equivalent to rolling on the material edge at the upper end of the steel strip edge (171), rolling off the material edge at the upper end of the steel strip edge (171), and processing the chamfer on the steel strip edge (171); The bending angle of the steel strip edge (171) at the center line position of the steel strip rolling and chamfering machine is 45°, and the scissors (5) are in a horizontal state parallel to the steel strip (17), so that the scissors (5) and the surface of the steel strip edge (171) form an angle of 45°, so that the scissors (5) cut into the steel strip edge (171) at an angle of 45°.

2. The steel strip rolling and chamfering process according to claim 1, characterized in that: Each set of rolling cutting mechanisms also comprises a sliding seat (8) and an adjustment component acting on the sliding seat (8); a sliding groove (101) extending leftward and rightward is provided in the machine base (1); the sliding seat (8) is movably mounted in the sliding groove (101); and the main shaft (2) is connected to the sliding seat (8).

3. The steel strip rolling and chamfering process according to claim 2, characterized in that: The adjustment assembly comprises an adjustment screw (9) extending axially to the left and right, and a nut (10) threadably matched with the adjustment screw (9); the nut (10) is fixed in the machine base (1); and the end of the adjustment screw (9) is rotatably supported in the sliding seat (8).

4. The steel strip rolling and chamfering process according to claim 2, characterized in that: The main shaft (2) is threadably matched with the sliding seat (8).

5. The steel strip rolling and chamfering process according to claim 4, characterized in that: The sliding seat (8) is L-shaped, and comprises a seat body portion (81) extending horizontally, and a seat arm portion (82) extending vertically upward from the seat body portion (81); the lower section of the main shaft (2) is a threaded section (21), the threaded section (21) is threadedly connected to the seat body portion (81), and the adjustment assembly is connected to the seat arm portion (82).

6. The steel strip rolling and chamfering process according to claim 5, characterized in that: Each set of rolling cutting mechanisms also comprises a support arm (11) fixed to the upper end of the seat arm portion (82), a support hole being provided in the support arm (11), and the main shaft (2) being in clearance fit with the support hole.

7. The steel strip rolling and chamfering process according to claim 6, characterized in that: The upper end of the main shaft (2) has a rotation operating portion (22) located above the support arm (11).

8. The steel strip rolling and chamfering process according to claim 1, characterized in that: The outer periphery of the bearing sleeve (4) is threadedly connected to a locking nut (18), and the lower end surface of the locking nut (18) is in abutment with the scissors (5).

9. The steel strip rolling and chamfering process according to claim 1, characterized in that: The bearing sleeve (4) and the scissors (5), and the guide roller (6) and the scissors (5) are all connected by keys.

10. The steel strip rolling and chamfering process according to claim 1, characterized in that: An angle α is formed between the central axis of the main shaft (2) and the vertical line, and the angle α is 2° to 5°.

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