A cold bending forming process for high frequency welded stainless steel pipes for highway guardrails

Abstract

The present application relates to a cold bending forming process for a high-frequency stainless steel welded pipe for a highway guardrail, and relates to the technical field of stainless steel welded pipe processing technology, which includes the following steps: S1 uncoiling; S2 leveling; S3 strip tail detection; S4 strip tail shearing; S5 strip head detection; S6 strip head shearing; S7 alignment; S8 beveling; S9 welding; S10 planing; S11 material storage; S12 forming; S13 high-frequency welding; S14 scraping; S15 cooling; S16 sizing; S17 correction. The present application can optimize the shearing and welding process of the steel strip coil, and does not require the subsequent cutting of a section of the two steel strip coils welded in the stainless steel welded pipe.

Description

Technical Field

[0001] The present application relates to the technical field of stainless steel welded pipe processing technology, and in particular to a cold bending forming processing technology of stainless steel high-frequency welded pipes for highway guardrails. Background Art

[0002] Stainless steel highway guardrails are widely used due to their strong corrosion resistance, high strength and low maintenance costs.

[0003] Stainless steel highway guardrails are usually produced using a high-frequency welded pipe cold-bending process. During production, the uncoiled stainless steel strip is first flattened by a flattening device, then formed into a tube using a continuous cold-bending mechanism, and then the formed stainless steel pipe blank is high-frequency welded. Finally, the formed stainless steel welded pipe is subjected to weld cooling, scraping and other processes before it can be cut into sections and packaged.

[0004] In the production process of the above-mentioned stainless steel highway guardrail, in order to ensure continuous processing, after the previous roll of steel strip is completely unrolled, it is necessary to change the roll, and the tail of the previous roll of steel strip and the head of the next roll of steel strip are sheared, and then welded.

[0005] At present, when welding two steel strips, the two steel strips are simply abutted and then butt-welded, which results in low welding quality. In actual production, it is necessary to add a process of cutting off a section of the two steel strips welded in the stainless steel welded pipe, which not only increases the subsequent processing steps, but also affects the fixed-length packaging of the stainless steel welded pipe. Summary of the invention

[0006] In order to optimize the shearing and welding process of steel strip coils, the present application provides a cold bending forming process for high-frequency welded stainless steel pipes for highway guardrails.

[0007] The present application provides a cold bending forming process for high-frequency welded stainless steel pipes for highway guardrails, which adopts the following technical solutions:

[0008] A cold bending forming process for a highway guardrail stainless steel high-frequency welded pipe comprises the following steps:

[0009] S1 Uncoiling: Uncoiling the steel strip and adjusting the strip-out direction of the steel strip;

[0010] S2 leveling: leveling the uncoiled steel strip;

[0011] S3 tail detection: detect the tail of the steel belt. When the tail of the steel belt is detected, fix the tail of the steel belt.

[0012] S4 Tail Shearing: Shear the discarded tail of the steel strip;

[0013] S5 belt head detection: detect the belt head of the steel belt. When the belt head of the steel belt is detected, fix the belt head of the steel belt;

[0014] S6 Strip head shearing: Shear the discarded part of the strip head;

[0015] S7 alignment: align the cut tape head and tape tail, and then fix the cut tape head;

[0016] S8 Beveling: Plane and bevel the contact position of the aligned belt head and belt tail;

[0017] S9 welding: welding the belt head and belt tail, and cancel the fixation of the belt head and belt tail after welding;

[0018] S10 planing: planing and trimming the two sides of the steel strip;

[0019] S11 storage: temporary storage of the steel strip after edge planing;

[0020] S12 forming: forming the steel strip so that it gradually curls until a tube embryo is formed;

[0021] S13 high frequency welding: high frequency welding is performed on the formed tube blank to form a stainless steel welded tube;

[0022] S14 Scraping: Scraping the weld excess height produced by high-frequency welding;

[0023] S15 cooling: cooling the weld after welding;

[0024] S16 sizing: to fine-tune the shape of the welded pipe;

[0025] S17 correction: straighten and twist the welded pipe to complete the welded pipe forming.

[0026] By adopting the above technical solution, when welding two rolls of steel strips, the discarded parts of the two rolls of steel strips are first cut off, and then the two rolls of steel strips are aligned and fixed to prevent displacement during the welding process, and then a groove is opened at the welding position to further improve the welding quality and optimize the shearing and welding process of the steel strip rolls, thereby avoiding the need to cut off a section of the two steel strip rolls welded in the stainless steel welded pipe in the future.

[0027] Optionally, a detection component is used to detect the head and tail of the steel belt, and the detection component includes a bracket, a detection telescopic plate and a detection spring; the detection telescopic plate is vertically arranged at the bottom of the steel belt, the fixed end of the detection telescopic plate is fixedly connected to the bracket, the top surface of the movable end of the detection telescopic plate is inclined upward along the traveling direction of the steel belt, and the movable end of the detection telescopic plate divides the interior of the fixed end of the detection telescopic plate into a detection plate cavity and a detection plateless cavity; at least one detection spring is arranged in the detection plateless cavity, and the detection spring is in a compressed state.

[0028] By adopting the above technical solution, a mechanical detection of the head and tail of the steel strip is provided. During the detection, when the head and tail of the steel strip pass through the position of the detection telescopic plate, a rapid response is made, and the structure is simple and reliable.

[0029] Optionally, a first fixing component is used to fix the tail of the steel belt, and the first fixing component includes a first telescopic plate, a first spring, a first brake block and a first connecting tube; the first telescopic plate is vertically arranged on the top of the steel belt, the fixed end of the first telescopic plate is fixedly connected to the bracket, and the movable end of the first telescopic plate divides the interior of the fixed end of the first telescopic plate into a first plate cavity and a first plateless cavity; at least one first spring is arranged in the first plateless cavity, and the first spring is in a compressed state; the first brake block is fixedly arranged at the movable end of the first telescopic plate; the two ends of the first connecting tube are respectively connected to the detection plateless cavity and the first plated cavity, and liquid is preset in the first connecting tube, the detection plateless cavity and the first plated cavity.

[0030] By adopting the above technical solution, when the tail of the steel belt passes through and moves away from the movable end of the detection telescopic plate, the detection telescopic plate extends, and the liquid in the first plate cavity enters the detection plateless cavity. The first telescopic plate extends, driving the first brake block to abut against the steel belt, thereby braking the tail of the steel belt. The steel belt is fixed after decelerating and sliding for a certain distance, thereby realizing the detection of the tail of the steel belt by the detection component and controlling the first fixing component to fix it.

[0031] Optionally, a second fixing component is used to fix the head of the steel belt, and the second fixing component includes a second telescopic plate, a second spring, a second brake block and a second connecting tube; the second telescopic plate is vertically arranged on the top of the steel belt, the fixed end of the second telescopic plate is fixedly connected to the bracket, and the movable end of the second telescopic plate divides the interior of the fixed end of the second telescopic plate into a second plate-containing cavity and a second plateless cavity; at least one second spring is arranged in the second plate-containing cavity, and the second spring is in a compressed state; the second brake block is fixedly arranged at the movable end of the second telescopic plate; the two ends of the second connecting tube are respectively connected to the detection plateless cavity and the second plateless cavity, and liquid is preset in the second connecting tube and the second plateless cavity; an adjusting component is also arranged on the bracket, and the adjusting component is used to adjust the connection state of the first connecting tube and the second connecting tube.

[0032] By adopting the above technical solution, when the tail of the steel strip is fixed, the adjustment component adjusts the first connecting pipe to be in a disconnected state and the second connecting pipe to be in a connected state. When the head of the subsequent steel strip roll reaches the position of the detection telescopic plate, the detection telescopic plate shrinks, so that the liquid in the detection plateless cavity enters the second plateless cavity, so that the second telescopic plate extends, driving the second brake block to abut against the steel strip, braking the head of the steel strip, and the steel strip is fixed after the steel strip decelerates and slides to abut against the tail of the front end steel strip roll after being sheared, and then the head of the steel strip is sheared, and the above process is repeated, and the steel strip is fixed after the steel strip decelerates and slides to abut against the tail of the front end steel strip roll after being sheared for the second time, so that the head of the steel strip is detected by the detection component, and the second fixing component is controlled to fix it, and the braking force of the second brake block on the head of the steel strip is used to decelerate the head of the steel strip until it is fixed, so that the head of the steel strip is aligned with the tail of the front end steel strip. The head of the cut steel strip falls down at an angle under the action of the detection telescopic plate, eliminating the need for manual unloading and improving the convenience of production.

[0033] Optionally, the adjustment component includes a first electric valve, a second electric valve, a touch switch, a counter and a controller; the first electric valve is installed on the first connecting pipe; the second electric valve is installed on the second connecting pipe; the touch switch is fixedly installed on the bottom of the first brake block; the counter is fixedly installed on the bottom of the second brake block; the controller is fixedly set on the bracket, and the controller is electrically connected to the first electric valve, the second electric valve, the touch switch and the counter.

[0034] By adopting the above technical solution, the connection state of the first connecting pipe and the second connecting pipe in different time periods can be adjusted through the cooperation of the touch switch and the timer.

[0035] Optionally, a shearing and welding assembly is used to shear the discarded parts of the head and tail of the steel strip, and to perform beveling and butt welding, and the shearing and butt welding assembly includes a first hydraulic cylinder and a second hydraulic cylinder; the fixed end of the first hydraulic cylinder is fixedly connected to the bracket, and a first shear, a beveling scraper and a welding gun are provided on the movable end of the first hydraulic cylinder; the first shear is used to shear the discarded part of the tail of the steel strip; the beveling scraper is used to bevele; the welding gun is used to weld the head and tail of the steel strip; the fixed end of the second hydraulic cylinder is fixedly connected to the bracket, and a second shear is fixedly provided on the movable end of the second hydraulic cylinder, and the second shear is used to shear the discarded part of the head of the steel strip.

[0036] By adopting the above technical scheme, the first hydraulic cylinder and the second hydraulic cylinder are used to drive the first shearing machine and the second shearing machine respectively, so as to realize the shearing and removal of the waste part of the tail of the steel strip and the shearing and removal of the waste part of the head of the steel strip, and the beveling is made by using a beveling scraper, and the butt welding of the front and rear steel strip coils is realized in cooperation with the welding gun.

[0037] Optionally, a hydraulic uncoiler is used to uncoil the steel strip coil, the hydraulic uncoiler is connected to the bracket, a pressure roller is provided on the hydraulic uncoiler, and the pressure roller is used to adjust the strip delivery direction of the steel strip coil; a horizontal spiral loop is used to temporarily store the steel strip, and the horizontal spiral loop is fixedly arranged on the bracket.

[0038] By adopting the above technical scheme, the steel strip coil is uncoiled by a hydraulic uncoiler, which is convenient for operation, and the steel strip output direction is made horizontal by the pressure roller, so as to facilitate the leveling of the steel strip; the setting of the horizontal spiral loop enables the subsequent forming and high-frequency welding processes to proceed normally during the shearing and welding process, thereby improving production efficiency.

[0039] Optionally, a leveling assembly is used to level the steel strip; the leveling assembly includes a leveling roller and a motor, the leveling roller is rotatably connected to the bracket; the motor is fixedly connected to the bracket, and the motor is used to drive the leveling roller to rotate.

[0040] By adopting the above technical solution, the steel strip is leveled, so that the produced stainless steel pipe is of high quality and the welding quality of shear butt welding is further improved.

[0041] Optionally, the steel strip is formed by a forming roller, which is rotatably connected to the bracket; the two side edges of the steel strip are planed by a planing scraper, which is fixedly connected to the bracket; and the formed tube blank is high-frequency welded by a high-frequency welder.

[0042] By adopting the above technical solution, the two side edges of the steel strip are planed so that during the forming process, the two side edges of the steel strip can be well meshed, thereby improving the welding quality of high-frequency welding.

[0043] Optionally, a reinforcement scraper is used to scrape off the reinforcement of the weld of the welded pipe, and the reinforcement scraper is fixedly connected to the bracket; a water trough is used to cool the weld, and the water trough is fixedly connected to the bracket; a sizing roller is used to finish and shape the welded pipe, and the sizing roller is rotatably connected to the bracket; a correction rack is used to straighten and twist the welded pipe, and the correction rack is rotatably connected to the bracket.

[0044] By adopting the above technical solution, the weld excess height on the welded pipe is scraped flat to make the weld flush with the base material; then the welded pipe is finely shaped as needed to ensure the diameter accuracy of the welded pipe, and finally the welded pipe is straightened and twisted to complete the forming of the welded pipe.

[0045] In summary, the present application includes at least one of the following beneficial technical effects:

[0046] When welding two rolls of steel strips, the discarded parts of the two rolls of steel strips are first cut off, and then the two rolls of steel strips are aligned and fixed to prevent displacement during welding, and then a groove is opened at the welding position to further improve the welding quality, thereby avoiding the subsequent cutting of a section of the two steel strips welded in the stainless steel welded pipe, thereby optimizing the shearing and welding process of the steel strips;

[0047] By setting up the detection assembly, a mechanical detection of the head and tail of the steel belt is provided. During the detection, when the head and tail of the steel belt pass through the position of the detection telescopic plate, a response is quickly made, and the structure is simple and reliable;

[0048] By setting a first fixing component to cooperate with the detection component, when the tail of the steel belt passes through and moves away from the movable end of the detection telescopic plate, the detection telescopic plate extends, and the liquid in the first plate cavity enters into the detection plateless cavity. The first telescopic plate extends, driving the first brake block to abut against the steel belt, braking the tail of the steel belt, and the steel belt is fixed after decelerating and sliding for a distance, thereby realizing the detection of the tail of the steel belt by the detection component and controlling the first fixing component to fix it;

[0049] By setting up the second fixing component and cooperating with the detection component, the detection component can detect the head of the steel strip, and the second fixing component can be controlled to fix it, and the braking force of the second brake block on the head of the steel strip can be used to slow down the head of the steel strip until it is fixed, so that the head of the steel strip is aligned with the tail of the front steel strip. The head of the cut steel strip falls off at an angle under the action of the detection telescopic plate, without the need for manual unloading, which improves the convenience of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a schematic diagram showing the structure of the detection component in an embodiment of the present application;

[0051] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0052] Figure 3 is a cross-sectional view of an embodiment of the present application;

[0053] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle;

[0054] Figure 5 yes Figure 1 A partial enlarged view of point C in the middle;

[0055] Figure 6 It is a schematic diagram showing the structure of a sizing roller according to an embodiment of the present application.

[0056] Description of reference numerals:

[0057] 1. Detection components; 11. Bracket; 111. Hydraulic uncoiler; 1111. Pressing roller; 112. Horizontal spiral looper; 113. Forming roller; 114. Edge planing scraper; 115. High frequency welding machine; 116. Excess height scraper; 117. Water tank; 118. Sizing roller; 119. Correction frame; 12. Detection of telescopic plate; 121. Detection of plate cavity; 122. Detection of no plate cavity; 13. Detection of spring;

[0058] 2. First fixing assembly; 21. First telescopic plate; 211. First plate-containing cavity; 212. First plate-free cavity; 22. First spring; 23. First brake block; 24. First connecting pipe;

[0059] 3. Second fixing assembly; 31. Second telescopic plate; 311. Second plate-containing cavity; 312. Second plate-free cavity; 32. Second spring; 33. Second brake block; 34. Second connecting pipe;

[0060] 4. Adjustment component; 41. First electric valve; 42. Second electric valve; 43. Touch switch; 44. Counter; 45. Controller;

[0061] 5. Shearing and welding assembly; 51. First hydraulic cylinder; 511. First shearing machine; 512. Bevel scraper; 513. Welding gun; 52. Second hydraulic cylinder; 521. Second shearing machine;

[0062] 6. Leveling assembly; 61. Leveling roller; 62. Motor. DETAILED DESCRIPTION

[0063] The following is combined with Figure 1-5This application is described in further detail.

[0064] The present application embodiment discloses a cold bending forming process for a high-frequency welded stainless steel pipe for a highway guardrail. Figure 1 A highway guardrail stainless steel high-frequency welded pipe cold bending forming process includes the following steps:

[0065] S1 Uncoiling: Uncoiling the steel strip coil and adjusting the strip delivery direction of the steel strip coil so that the steel strip is delivered in the horizontal direction;

[0066] S2 leveling: leveling the uncoiled steel strip to make it straight;

[0067] S3 Tail detection: detect the tail of the steel strip at the shearing and welding position. When it is detected that the tail of the steel strip passes the shearing and welding position, fix the tail of the steel strip;

[0068] S4 tail shearing: the waste part of the tail of the steel strip is sheared off to form a new straight tail;

[0069] S5 Strip head detection: The strip head of the steel strip is detected at the shearing and welding position. When the strip head of the steel strip is detected to have passed the shearing and welding position, the strip head is fixed;

[0070] S6 Strip head shearing: The discarded part of the strip head is sheared off to form a new straight strip head;

[0071] S7 alignment: align the new tape head and the new tape tail after cutting, and then fix the new tape head after cutting;

[0072] S8 Beveling: Plane and cut a Y-shaped bevel at the contact position of the aligned belt head and belt tail;

[0073] S9 welding: welding the contact position between the belt head and the belt tail, and cancel the fixation of the belt head and the belt tail after welding;

[0074] S10 planing: Plane and trim the two sides of the steel strip to make the two sides of the steel strip smooth;

[0075] S11 storage: temporary storage of the steel strip after edge planing;

[0076] S12 forming: forming the steel strip so that it gradually curls until a tube embryo is formed;

[0077] S13 high frequency welding: high frequency welding is performed on the formed tube blank to form a stainless steel welded tube;

[0078] S14 Scraping: Scraping the weld excess height produced by high-frequency welding;

[0079] S15 cooling: cooling the weld after welding;

[0080] S16 sizing: to fine-tune the shape of the welded pipe;

[0081] S17 correction: straighten and twist the welded pipe to complete the welded pipe forming.

[0082] Reference Figure 1 , the detection assembly 1 is used to detect the strip head and strip tail of the steel strip at the shearing and welding position. The detection assembly 1 includes a bracket 11, and the bracket 11 is arranged horizontally. A hydraulic uncoiler 111 is arranged on the bracket 11, and the hydraulic uncoiler 111 is used to uncoil the steel strip coil. A pressure roller 1111 is arranged on the top of the hydraulic uncoiler 111, and the pressure roller 1111 is used to adjust the strip output direction of the steel strip coil and make the steel strip coil extend in the horizontal direction.

[0083] Reference Figure 1 and Figure 2 The bracket 11 is provided with a leveling assembly 6, which includes a leveling roller 61 and a motor 62. Two groups of leveling rollers 61 are provided, each group consists of three leveling rollers 61 arranged in the horizontal direction, and the two groups of leveling rollers 61 are arranged in the vertical direction. One motor 62 is provided, and the motor 62 drives one group of leveling rollers 61 to rotate through a synchronous belt and a synchronous pulley.

[0084] When producing stainless steel highway guardrails, the steel strip is first unwound by the hydraulic unwinder 111, and then the steel strip is horizontally extended to between the two sets of leveling rollers 61 by the pressure roller 1111, and the steel strip is leveled into a straight plate by the leveling roller 61. It should be noted that after the steel strip enters between the two sets of leveling rollers 61, the motor 62 drives the leveling roller 61 to rotate, providing power for the movement of the steel strip.

[0085] Reference Figure 3 and Figure 4 The detection assembly 1 also includes a detection telescopic plate 12 and a detection spring 13. The detection telescopic plate 12 is vertically arranged on the bracket 11 and is located on the side of the leveling roller 61 away from the hydraulic uncoiler 111. The detection telescopic plate 12 is vertically arranged at the bottom of the steel strip. The fixed end of the detection telescopic plate 12 is fixedly connected to the bracket 11. The movable end of the detection telescopic plate 12 divides the fixed end of the detection telescopic plate 12 into a detection plate cavity 121 and a detection plateless cavity 122. The detection plate cavity 121 is located at the top of the detection plateless cavity 122. The top wall of the movable end of the detection telescopic plate 12 is inclined upward along the traveling direction of the steel strip. A detection spring 13 is provided. The detection spring 13 is vertically arranged in the detection plateless cavity 122, and the two ends are respectively fixedly connected to the fixed end of the detection telescopic plate 12 and the movable end of the detection telescopic plate 12. The detection spring 13 is always in a compressed state.

[0086] Reference Figure 3 and Figure 4 The bracket 11 is provided with a first fixing assembly 2, which includes a first telescopic plate 21, a first spring 22, a first brake block 23 and a first connecting pipe 24. The first telescopic plate 21 is vertically arranged on the top of the steel strip and is located on the side of the detection telescopic plate 12 away from the hydraulic uncoiler 111. The fixed end of the first telescopic plate 21 is fixedly connected to the bracket 11. The movable end of the first telescopic plate 21 divides the interior of the fixed end of the first telescopic plate 21 into a first plate-containing cavity 211 and a first plate-free cavity 212. The first plate-containing cavity 211 is located at the bottom of the first plate-free cavity 212.

[0087] The first spring 22 is provided with one, and the first spring 22 is vertically arranged in the first plateless cavity 212. The two ends of the first spring 22 are respectively fixedly connected to the fixed end of the first telescopic plate 21 and the movable end of the first telescopic plate 21, and the first spring 22 is always in a compressed state. The first brake block 23 is fixedly arranged at the bottom of the movable end of the first telescopic plate 21. The two ends of the first connecting pipe 24 are respectively connected to the detection plateless cavity 122 and the first plated cavity 211, and liquid is preset in the first connecting pipe 24, the detection plateless cavity 122 and the first plated cavity 211.

[0088] The bracket 11 is provided with a second fixing assembly 3, which includes a second telescopic plate 31, a second spring 32, a second brake block 33, and a second connecting pipe 34. The second telescopic plate 31 is vertically arranged on the top of the steel strip and is located between the leveling rollers 61 of the detection telescopic plate 12. The fixed end of the second telescopic plate 31 is fixedly connected to the bracket 11. The movable end of the second telescopic plate 31 divides the interior of the fixed end of the second telescopic plate 31 into a second plate-containing cavity 311 and a second plate-free cavity 312. The second plate-containing cavity 311 is located at the bottom of the second plate-free cavity 312.

[0089] Two second springs 32 are provided, and the second springs 32 are vertically arranged in the second plate cavity 311. The two ends of the second spring 32 are respectively fixedly connected to the fixed end of the second telescopic plate 31 and the movable end of the second telescopic plate 31. The second spring 32 is always in a compressed state, and the elastic force of the second spring 32 is greater than the elastic force of the first spring 22. The second brake block 33 is fixedly arranged at the bottom of the movable end of the second telescopic plate 31. The two ends of the second connecting pipe 34 are respectively connected to the detection plateless cavity 122 and the second plateless cavity 312, and liquid is preset in the second connecting pipe 34 and the second plateless cavity 312.

[0090] Reference Figure 1 and Figure 4, an adjustment component 4 is arranged on the bracket 11, and the adjustment component 4 includes a first electric valve 41, a second electric valve 42, a touch switch 43, a counter 44 and a controller 45. The first electric valve 41 is fixedly mounted on the first connecting pipe 24, and the second electric valve 42 is mounted on the second connecting pipe 34. The touch switch 43 is fixedly mounted on the bottom of the first brake block 23, and when the first brake block 23 abuts against the steel belt, the touch switch 43 is triggered. The counter 44 is fixedly mounted on the bottom of the second brake block 33, and is used to count the number of abutments between the second brake block 33 and the steel belt. The controller 45 is fixedly arranged on the bracket 11, and the controller 45 is electrically connected to the first electric valve 41, the second electric valve 42, the touch switch 43, and the counter 44.

[0091] Reference Figure 1 and Figure 5 , a shearing and welding assembly 5 is arranged on the bracket 11, and the shearing and welding assembly 5 includes a first hydraulic cylinder 51 and a second hydraulic cylinder 52. The first hydraulic cylinder 51 is located between the detection telescopic plate 12 and the first telescopic plate 21, and the first hydraulic cylinder 51 is arranged horizontally. The fixed end of the first hydraulic cylinder 51 is fixedly connected to the bracket 11, and a first shearing machine 511, a groove scraper 512 and a welding gun 513 are arranged on the movable end of the first hydraulic cylinder 51. The first shearing machine 511 is used to shear the discarded part of the tail of the steel strip. The groove scraper 512 can be detachably connected to the movable end of the first hydraulic cylinder 51 by bolts, so that different models of the groove scraper 512 can be replaced according to actual needs. The welding gun 513 is used to weld the head and tail of the steel strip.

[0092] In actual production, air guns for blowing argon gas can be arranged on both sides of the welding gun 513 according to the situation, so as to provide argon gas to the welding point during the welding process to prevent the weld from being oxidized, thereby improving the welding quality.

[0093] Reference Figure 4 and Figure 5 The second hydraulic cylinder 52 is located between the detection telescopic plate 12 and the second telescopic plate 31. The second hydraulic cylinder 52 is arranged horizontally. The fixed end of the second hydraulic cylinder 52 is fixedly connected to the bracket 11. The movable end of the second hydraulic cylinder 52 is provided with a second shearing machine 521. The second shearing machine 521 is used to shear the discarded part of the strip head of the steel strip.

[0094] In the initial state, the second electric valve 42 is in a closed state, the first telescopic plate 21 is in an extended state under the action of the first spring 22, the second telescopic plate 31 is in a contracted state under the action of the second spring 32, and the detection telescopic plate 12 is in an extended state under the action of the detection spring 13.

[0095] When the steel belt reaches the position of the detection telescopic plate 12 after being leveled, the detection telescopic plate 12 is squeezed by the steel belt and continues to be compressed to shrink the detection spring 13, so that the liquid in the detection plateless cavity 122 enters the first plate cavity 211 through the first connecting tube 24, so that the first telescopic plate 21 shrinks and the steel belt can pass smoothly.

[0096] When the tail of the steel belt passes through and moves away from the movable end of the detection telescopic plate 12, due to the loss of the squeezing of the steel belt, the detection telescopic plate 12 extends under the action of the detection spring 13, so that the volume in the detection plateless cavity 122 increases. Under the action of the first spring 22, the liquid in the first plate cavity 211 enters into the detection plateless cavity 122 through the first connecting tube 24, and the first telescopic plate 21 extends, driving the first brake block 23 to abut against the steel belt, thereby braking the tail of the steel belt. The steel belt is fixed after decelerating and sliding for a certain distance.

[0097] The first brake block 23 abuts against the steel strip so that the touch switch 43 is triggered, and the controller 45 controls the first electric valve 41 to close and the second electric valve 42 to open, and drives the first hydraulic cylinder 51 to drive the first shearing machine 511 to work, so as to shear the tail of the steel strip, and the sheared scrap steel plate falls downward under the action of its own gravity.

[0098] When the head of the subsequent steel strip roll reaches the position of the detection telescopic plate 12, the detection telescopic plate 12 is squeezed by the steel strip and continues to compress the detection spring 13 to contract, so that the liquid in the detection plateless cavity 122 enters the second plateless cavity 312 through the second connecting tube 34, so that the second telescopic plate 31 continues to compress the second spring 32 to extend, and drives the second brake block 33 to abut against the steel strip, thereby braking the head of the steel strip. The steel strip is fixed after it decelerates and slides until it abuts against the tail of the front end steel strip roll after being sheared.

[0099] The second brake block 33 abuts against the steel strip so that the counter 44 counts one, and the controller 45 drives the second hydraulic cylinder 52 to drive the second shearing machine 521 to work, and shears the head of the steel strip. After the shearing is completed, the sheared part is disconnected from the steel strip. Under the action of the detection spring 13, the detection telescopic plate 12 extends, so that the sheared steel plate tilts along the top wall of the detection telescopic plate 12, and then falls. In actual production, a collecting hopper can be set below to recycle the steel plate.

[0100] The extension of the detection telescopic plate 12 increases the volume of the detection plateless cavity 122. Under the action of the second spring 32, the second telescopic plate 31 contracts, and the liquid in the second plateless cavity 312 flows back to the detection plateless cavity 122 through the second connecting pipe 34, thereby canceling the fixation of the head of the steel strip. The steel strip continues to move. When it reaches the position of the detection telescopic plate 12, the above process is repeated. The detection telescopic plate 12 is squeezed and contracted by the steel strip, and the liquid in the detection plateless cavity 122 enters the second plateless cavity 312, causing the second telescopic plate 31 to extend and drive the second brake block 33 to abut against the steel strip to brake the head of the steel strip. The steel strip is fixed after it decelerates and slides until it abuts against the tail of the front end steel strip roll after being sheared. At this time, the counter 44 counts two, and the controller 45 controls the first hydraulic cylinder 51 to drive the groove scraper 512 to open the groove, and then the welding gun 513 is used for butt welding.

[0101] After the butt welding is completed, the controller 45 controls the first electric valve 41 to open. Since the elastic force of the second spring 32 is greater than the elastic force of the first spring 22, under the action of the second spring 32, the liquid in the second plateless cavity 312 enters the first plated cavity 211 through the second connecting pipe 34, the detection plateless cavity 122 and the first connecting pipe 24, so that the first telescopic plate 21 and the second telescopic plate 31 are both in a contracted state, the fixation of the steel strip is cancelled, and the steel strip continues to move. After a short delay, the second electric valve 42 is closed, and the two valves are in the initial state.

[0102] Reference Figure 1 A planing scraper 114 is fixedly mounted on the bracket 11. Two planing scrapers 114 are provided and are located on the side of the first telescopic plate 21 away from the hydraulic uncoiler 111. The two planing scrapers 114 are respectively located on both sides of the steel strip. The planing scrapers 114 are used to plane both sides of the steel strip during the movement of the steel strip.

[0103] A horizontal spiral looper 112 is fixedly provided on the bracket 11, and the horizontal spiral looper 112 is used for temporary storage of steel strips. It should be noted that a drive is provided inside the horizontal spiral looper 112 to provide power for the subsequent movement of the steel strips.

[0104] Reference Figure 1 and Figure 6 The support 11 is provided with a forming roller 113 which is rotatably mounted thereon. The forming roller 113 is provided with nine groups, each group including two forming rollers 113. The forming rollers 113 gradually curl the steel strip into a tubular structure. The drawings of this specification only show four groups of forming rollers 113. In some other embodiments, the forming roller 113 adopts a floating roller technology. At the same time, during production, the forming roller 113 and the steel strip are lubricated with a self-circulating lubricating liquid to avoid scratches on the steel strip surface caused by the speed difference between the steel strip and the forming roller 113.

[0105] Reference Figure 6A high frequency welder 115 is fixedly mounted on the bracket 11. The high frequency welder 115 is used to perform high frequency heating on the formed tube embryo, and cooperate with the forming roller to extrude the formed tube embryo, so as to weld the formed tube embryo to form a straight welded pipe. During the welding process, argon protection can also be used according to the actual production environment to improve the welding quality.

[0106] The bracket 11 is fixedly provided with an excess height scraper 116, which is located on the side of the high frequency welding machine 115 away from the forming roller 113, and is used to scrape the excess height of the weld of the welded pipe. A collection device can be provided to collect the scraped waste for easy recycling.

[0107] A water tank 117 is fixedly provided on the bracket 11 . The water tank 117 is located on a side of the excess height scraper 116 away from the high-frequency welder 115 . The welded pipe passes through the water tank 117 , thereby cooling the welded pipe.

[0108] The bracket 11 is provided with sizing rollers 118, which are located on the side of the water trough 117 away from the excess height scraper 116. Five groups of sizing rollers 118 are provided, and the sizing rollers 118 are rotatably connected to the bracket 11. The welded pipe passes through the five groups of sizing rollers 118 in sequence and is shaped under the action of the sizing rollers 118.

[0109] A correction rack 119 is fixedly arranged on the bracket 11, and two sets of correction racks 119 are arranged, and the correction racks 119 are located on the side of the sizing roller 118 away from the water tank 117. The welded pipe passes through the two sets of correction racks 119 in sequence, and is straightened and twisted under the action of the correction racks 119, and finally forms a qualified welded pipe.

[0110] The implementation principle of the cold bending forming process of a stainless steel high-frequency welded pipe for highway guardrail in the embodiment of the present application is as follows:

[0111] When producing stainless steel highway guardrails, the steel strip is first unwound by the hydraulic unwinder 111, and the strip delivery direction of the steel strip is adjusted by the pressure roller 1111 so that the steel strip is delivered in a horizontal direction. Then, the steel strip is leveled into a straight plate shape by the leveling roller 61.

[0112] When the steel belt reaches the position of the detection telescopic plate 12 after being leveled, the detection telescopic plate 12 is contracted, so that the liquid in the detection plateless cavity 122 enters the first plate cavity 211, so that the first telescopic plate 21 is contracted, and the steel belt can pass smoothly.

[0113] When the tail of the steel belt passes through and moves away from the movable end of the detection telescopic plate 12, the detection telescopic plate 12 extends, and the liquid in the first plate cavity 211 enters into the detection plateless cavity 122. The first telescopic plate 21 extends, driving the first brake block 23 to abut against the steel belt, braking the tail of the steel belt, and the steel belt is fixed after decelerating and sliding for a distance.

[0114] The first brake block 23 abuts against the steel strip so that the touch switch 43 is triggered, and the controller 45 controls the first electric valve 41 to close and the second electric valve 42 to open, and drives the first hydraulic cylinder 51 to drive the first shearing machine 511 to work, so as to shear the tail of the steel strip, and the sheared scrap steel plate falls downward under the action of its own gravity.

[0115] When the head of the subsequent steel strip coil reaches the position of the detection telescopic plate 12, the detection telescopic plate 12 contracts, so that the liquid in the detection plateless cavity 122 enters into the second plateless cavity 312, and the second telescopic plate 31 extends, driving the second brake block 33 to abut against the steel strip, thereby braking the head of the steel strip. The steel strip is fixed after it decelerates and slides until it abuts against the tail of the front end steel strip coil after being sheared.

[0116] The second brake block 33 abuts against the steel strip so that the counter 44 counts one, and the controller 45 drives the second hydraulic cylinder 52 to drive the second shearing machine 521 to shear the head of the steel strip. After the shearing is completed, the detection telescopic plate 12 extends, so that the sheared steel plate tilts along the top wall of the detection telescopic plate 12 and falls.

[0117] The extension of the detection telescopic plate 12 causes the second telescopic plate 31 to contract, thereby canceling the fixation of the head of the steel strip. The steel strip continues to move. When it reaches the position of the detection telescopic plate 12, the above process is repeated to extend the second telescopic plate 31 and drive the second brake block 33 to abut against the steel strip, thereby braking the head of the steel strip. The steel strip is fixed after it decelerates and slides until it abuts against the tail of the front end steel strip roll after being sheared. At this time, the counter 44 counts two, and the controller 45 controls the first hydraulic cylinder 51 to drive the groove scraper 512 to open the groove, and then the welding gun 513 is used for butt welding.

[0118] After the butt welding is completed, the controller 45 controls the first electric valve 41 to open, and the liquid in the second plateless chamber 312 enters the first plated chamber 211, so that the first telescopic plate 21 and the second telescopic plate 31 are both in a retracted state, and the fixing of the steel strip is cancelled, and the steel strip continues to move. After the planing scraper 114 planes both sides, it enters the horizontal spiral looper 112 for material storage.

[0119] The steel strip coming out of the horizontal spiral loop 112 passes through the forming roller 113, is gradually curled into a tubular structure, and finally is high-frequency welded by the high-frequency welding machine 115. The welded steel pipe first passes through the excess height scraper 116 to flatten the weld excess height, and then passes through the water tank 117 to cool the high-temperature weld and welded pipe, and then passes through five groups of sizing rollers 118 to fine-tune the shape of the welded pipe, and finally passes through two groups of correction racks 119 to straighten and twist the welded pipe. After the steel pipe is formed into the actual required shape, the welded pipe can be cut to length through hot cutting or cold cutting sawing technology to complete the production of the finished welded pipe.

[0120] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cold bending forming process for high-frequency welded stainless steel pipes for highway guardrails, characterized in that: The following steps are involved: S1 Uncoiling: Uncoiling the steel strip and adjusting the strip-out direction of the steel strip; S2 leveling: leveling the uncoiled steel strip; S3 tail detection: detect the tail of the steel belt. When the tail of the steel belt is detected, fix the tail of the steel belt. S4 Tail Shearing: Shear the discarded tail of the steel strip; S5 belt head detection: detect the belt head of the steel belt. When the belt head of the steel belt is detected, fix the belt head of the steel belt; S6 Strip head shearing: Shear the discarded part of the strip head; S7 alignment: align the cut tape head and tape tail, and then fix the cut tape head; S8 Beveling: Plane and bevel the contact position of the aligned belt head and belt tail; S9 welding: welding the belt head and belt tail, and cancel the fixation of the belt head and belt tail after welding; S10 planing: planing and trimming the two sides of the steel strip; S11 storage: temporary storage of the steel strip after edge planing; S12 forming: forming the steel strip so that it gradually curls until a tube embryo is formed; S13 high frequency welding: high frequency welding is performed on the formed tube blank to form a stainless steel welded tube; S14 Scraping: Scraping the weld excess height produced by high-frequency welding; S15 cooling: cooling the weld after welding; S16 sizing: to fine-tune the shape of the welded pipe; S17 correction: straighten and twist the welded pipe to complete the welded pipe forming; A detection assembly (1) is used to detect the head and tail of a steel strip, the detection assembly (1) comprising a bracket (11), a detection telescopic plate (12) and a detection spring (13); the detection telescopic plate (12) is vertically arranged at the bottom of the steel strip, the fixed end of the detection telescopic plate (12) is fixedly connected to the bracket (11), the top surface of the movable end of the detection telescopic plate (12) is arranged obliquely upward along the traveling direction of the steel strip, and the movable end of the detection telescopic plate (12) divides the interior of the fixed end of the detection telescopic plate (12) into a detection plate cavity (121) and a detection plateless cavity (122); at least one detection spring (13) is arranged in the detection plateless cavity (122), and the detection spring (13) is in a compressed state; A first fixing assembly (2) is used to fix the tail of the steel strip, the first fixing assembly (2) comprising a first telescopic plate (21), a first spring (22), a first brake block (23) and a first connecting pipe (24); the first telescopic plate (21) is vertically arranged on the top of the steel strip, the fixed end of the first telescopic plate (21) is fixedly connected to the bracket (11), and the movable end of the first telescopic plate (21) divides the interior of the fixed end of the first telescopic plate (21) into a first plate-without cavity (211) and a first plate-without cavity (212); at least one first spring (22) is arranged in the first plate-without cavity (212), and the first spring (22) is in a compressed state; the first brake block (23) is fixedly arranged at the movable end of the first telescopic plate (21); two ends of the first connecting pipe (24) are respectively connected to the detection plate-without cavity (122) and the first plate-without cavity (211), and liquid is preset in the first connecting pipe (24), the detection plate-without cavity (122) and the first plate-without cavity (211); A second fixing assembly (3) is used to fix the head of the steel strip, the second fixing assembly (3) comprising a second telescopic plate (31), a second spring (32), a second brake block (33) and a second connecting pipe (34); the second telescopic plate (31) is vertically arranged on the top of the steel strip, the fixed end of the second telescopic plate (31) is fixedly connected to the bracket (11), and the movable end of the second telescopic plate (31) divides the interior of the fixed end of the second telescopic plate (31) into a second plate-containing cavity (311) and a second plate-free cavity (312); the second spring (32) is arranged in the second plate-containing cavity ( At least one of the second springs (32) is arranged in the second telescopic plate (311), and the second spring (32) is in a compressed state; the second brake block (33) is fixedly arranged on the movable end of the second telescopic plate (31); the two ends of the second connecting tube (34) are respectively connected to the detection plateless cavity (122) and the second plateless cavity (312), and liquid is preset in the second connecting tube (34) and the second plateless cavity (312); the bracket (11) is also provided with an adjustment component (4), and the adjustment component (4) is used to adjust the connection state of the first connecting tube (24) and the second connecting tube (34); The regulating assembly (4) comprises a first electric valve (41), a second electric valve (42), a touch switch (43), a counter (44) and a controller (45); the first electric valve (41) is mounted on the first connecting pipe (24); the second electric valve (42) is mounted on the second connecting pipe (34); the touch switch (43) is fixedly mounted on the bottom of the first brake block (23); the counter (44) is fixedly mounted on the bottom of the second brake block (33); the controller (45) is fixedly arranged on the bracket (11), and the controller (45) is electrically connected to the first electric valve (41), the second electric valve (42), the touch switch (43) and the counter (44).

2. According to claim 1, a cold bending forming process for high-frequency welded stainless steel pipes for highway guardrails is characterized by: A shearing and welding assembly (5) is used to shear the discarded portion of the head and tail of the steel strip, and to perform beveling and butt welding. The shearing and welding assembly (5) comprises a first hydraulic cylinder (51) and a second hydraulic cylinder (52); the fixed end of the first hydraulic cylinder (51) is fixedly connected to the bracket (11), and a first shear (511), a beveling scraper (512) and a welding gun (513) are arranged on the movable end of the first hydraulic cylinder (51); the first shear (511) is used to shear the discarded portion of the tail of the steel strip; the beveling scraper (512) is used to perform beveling; and the welding gun (513) is used to weld the head and tail of the steel strip; the fixed end of the second hydraulic cylinder (52) is fixedly connected to the bracket (11), and a second shear (521) is fixedly arranged on the movable end of the second hydraulic cylinder (52), and the second shear (521) is used to shear the discarded portion of the head of the steel strip.

3. According to claim 1, a cold bending forming process for high-frequency welded stainless steel pipes for highway guardrails is characterized by: A hydraulic uncoiler (111) is used to uncoil the steel strip coil; the hydraulic uncoiler (111) is connected to the support (11); a pressure roller (1111) is provided on the hydraulic uncoiler (111); the pressure roller (1111) is used to adjust the strip delivery direction of the steel strip coil; a horizontal spiral looper (112) is used to temporarily store the steel strip; the horizontal spiral looper (112) is fixedly provided on the support (11).

4. The cold bending forming process of a highway guardrail stainless steel high-frequency welded pipe according to claim 1 is characterized in that: A leveling assembly (6) is used to level the steel strip; the leveling assembly (6) comprises a leveling roller (61) and a motor (62); at least two leveling rollers (61) are provided and are rotatably connected to the bracket (11); the motor (62) is fixedly connected to the bracket (11), and the motor (62) is used to drive the leveling rollers (61) to rotate.

5. The cold bending forming process of a highway guardrail stainless steel high-frequency welded pipe according to claim 1 is characterized in that: The steel strip is formed by using a forming roller (113), the forming roller (113) being rotatably connected to the bracket (11); the two side edges of the steel strip are planed by using a planing scraper (114), the planing scraper (114) being fixedly connected to the bracket (11); and the formed tube blank is high-frequency welded by using a high-frequency welder (115), the high-frequency welder (115) being connected to the bracket (11).

6. The cold bending forming process of a highway guardrail stainless steel high-frequency welded pipe according to claim 1 is characterized in that: A residual height scraper (116) is used to scrape the residual height of the weld of the weld pipe, and the residual height scraper (116) is fixedly connected to the bracket (11); a water tank (117) is used to cool the weld, and the water tank (117) is fixedly connected to the bracket (11); a sizing roller (118) is used to fine-tune and shape the weld pipe, and the sizing roller (118) is rotatably connected to the bracket (11); a correction frame (119) is used to straighten and correct the twist of the weld pipe, and the correction frame (119) is rotatably connected to the bracket (11).

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