Section steel multi-line straightening machine

Abstract

The utility model discloses a profile steel multi-line straightening machine which comprises a base, a first support and a second support. The first support and the second support are oppositely arranged on the base. Each straightening roll set comprises a first roll shaft and a second roll shaft which are oppositely arranged, the two ends of each roll shaft are erected on the first support and the second support respectively, the first roll shaft is sleeved with a first roll sleeve, and the second roll shaft is sleeved with a second roll sleeve; the first driving mechanism is connected with the straightening roller set and used for driving the straightening roller set to rotate; the sleeve replacing assembly comprises a transfer trolley connected with the second support, a material frame detachably arranged on the transfer trolley and a second driving mechanism arranged on the base and connected with the second support. The second driving mechanism can drive the second support to move so as to drive the roller sleeve to be separated from the roller shaft, and the roller sleeve falls into the material frame. The profile steel multi-line straightening machine is high in bearing capacity, multiple pieces of profile steel can be straightened at the same time, and the yield is increased; the equipment is simple in structure, simple and convenient to maintain and easy to operate.

Description

Technical Field

[0001] The utility model relates to the field of section steel straightening, in particular to a multi-line section steel straightening machine. Background Art

[0002] In the production process of section steel, during the processes of heating, rolling, cooling on the cooling bed, finishing, transportation and various processing of the rolled piece, due to the influence of external forces, temperature changes and internal force growth and decline, etc., plastic deformations or internal residual stresses such as bending, warping, waviness, sickle bend or distortion of different degrees are often generated. In order to eliminate these shape defects and residual stresses and obtain straight finished steel, the rolled piece will be straightened on a straightening machine.

[0003] Among them, for medium and small-sized section steel with a size below 250 mm, a cantilever type straightening machine is mainly used. Refer to Figure 1 As shown, it is a schematic diagram of the main structure of the existing cantilever type straightening machine. In the cantilever type straightening machine, one end of the roller is connected to the frame, and the other end of the roller is arranged in a suspended manner. The cantilever type straightening machine is more convenient in terms of maintenance, roll sleeve replacement, etc. Therefore, it has a wide application in the field of straightening machines. However, since the cantilever type straightening machine is only connected at one end of the roller, the support strength for the roller is small, the straightening force is small, and the length of the roller is usually about 500 mm. Due to structural limitations, the roll length cannot be greatly extended. The limitations of the roll length and support strength also make the cantilever type straightening machine only applicable to medium and small-sized section steel. When straightening medium and small-sized section steel, the roll surface size is relatively close to the width of the section steel, and the straightening force is small, so only a single-roll straightening method can be adopted. Therefore, the straightening efficiency of the existing cantilever type straightening machine is very low. In order to increase the output of products, currently, mainly multiple cantilever type straightening machines are set to work simultaneously. The existing method of increasing output will cause a large increase in equipment investment costs and site occupation costs. Therefore, the cantilever type straightening machine is a bottleneck equipment for continuous production of small-sized section steel. Summary of the Invention

[0004] In order to overcome the defects in the prior art, an embodiment of the utility model provides a multi-line section steel straightening machine, which has strong bearing capacity, can straighten multiple section steels simultaneously to improve the output; and the equipment has a simple structure, is easy to maintain and operate.

[0005] To achieve the above object, the technical solution adopted by the utility model is: a multi-line section steel straightening machine, which is used for straightening section steel with a width of 30 mm to 250 mm. The multi-line section steel straightening machine includes:

[0006] A base, and brackets oppositely arranged on the base. The brackets include a first bracket fixedly connected to the base and a second bracket capable of moving towards or away from the first bracket;

[0007] Multiple sets of straightening roll sets, each straightening roll set includes a first roll shaft and a second roll shaft arranged oppositely, both ends of the roll shafts are respectively mounted on the first bracket and the second bracket, a first roll sleeve is sleeved on the first roll shaft, a second roll sleeve is sleeved on the second roll shaft, and the working length of the roll sleeve ≥ 0.8m;

[0008] A first driving mechanism, the first driving mechanism is connected to the straightening roll set and is used to drive the straightening roll set to rotate;

[0009] A sleeve-changing assembly, the sleeve-changing assembly includes a transfer cart connected to the second bracket, a material box detachably arranged on the transfer cart, and a second driving mechanism arranged on the base and connected to the second bracket; the second driving mechanism can drive the second bracket to move, so as to drive the roll sleeve to separate from the roll shaft, and make the roll sleeve fall into the material box.

[0010] By setting the double-support structure of the first bracket and the second bracket, the straightening rolls are supported simultaneously from both sides of multiple sets of straightening roll sets, which can improve the bearing capacity of the straightening machine, make the equipment more durable, extend the service life of the equipment, and reduce the production cost.

[0011] The straightening machine of the present application is mainly used for straightening small-sized steel sections. Small-sized steel sections refer to steel sections with a width dimension of 30mm - 250mm. The working length of the roll sleeve of this straightening machine ≥ 0.8m, so that multiple small-sized steel sections can be arranged side by side along the working length direction of the roll sleeve. And because this straightening machine has a double-support structure and the bearing capacity is enhanced, it can meet the requirement of straightening multiple small-sized steel sections simultaneously, thereby increasing the output of the straightening machine and improving the market competitiveness of the enterprise. It is found through actual operation that the production capacity of this straightening machine can reach more than 120 tons per hour.

[0012] During the production process, due to the wear of the roll sleeve or the change of the variety of steel sections to be processed, the roll sleeve needs to be replaced. The straightening machine in the present application includes a sleeve-changing assembly, which can realize automatic sleeve-changing by using the sleeve-changing assembly, separate the roll shaft from the roll sleeve, and make the roll sleeve fall into the material box, reducing the workload of the staff and improving the efficiency of replacing the roll sleeve.

[0013] Further, the working length of the roll sleeve is 0.8 m to 1.2 m. The working length refers to the width of the part of the roll sleeve that contacts the steel section to be straightened and is used for straightening the steel section to be straightened. Setting the working length of the roll sleeve to 0.8 m to 1.2 m can meet the requirement of arranging multiple small steel sections simultaneously without exceeding the support strength range of the bracket and the driving capacity of the driving mechanism, thus realizing the simultaneous processing of multiple small steel sections. It can be understood that during the actual manufacturing process, the working length of the roll sleeve can be appropriately adjusted. However, if the working length of the roll sleeve is set below 800 mm, the simultaneous arrangement and straightening operation of multiple steel sections will be restricted. If the working length of the roll sleeve is further significantly extended, it will be necessary to simultaneously increase the support strength of the straightening machine and the driving capacity of the driving mechanism, which will make the structure of the straightening machine more complex and the equipment tend to be large-sized, and the effect of simultaneously straightening multiple steel sections on a small straightening machine in this application cannot be achieved.

[0014] The straightening machine of this application is mainly used for straightening small steel sections. Generally, it includes five groups of straightening roll sets. The five groups of straightening roll sets are arranged at intervals along the length direction of the bracket. Each group of straightening roll sets includes a first straightening roll and a second straightening roll that are oppositely arranged in the vertical direction. The first straightening roll includes a first roll shaft and a first roll sleeve sleeved on the first roll shaft. The second straightening roll includes a second roll shaft and a second roll sleeve sleeved on the second roll shaft. The roll shaft and the roll sleeve are in cooperative transmission through a conical surface and a keyway. A straightening area for accommodating the steel section to be straightened is formed between the first roll sleeve and the second roll sleeve that are oppositely arranged in the vertical direction. Many grooves are opened on the surface of the roll sleeve according to the specifications of the steel section, and different grooves correspond to straightening different products. The grooves on the first roll sleeve and the second roll sleeve correspond to each other, and the types of grooves include angle steel, channel steel, I-beam, etc. Bearings are provided in the first bracket, and one end of the straightening roll is arranged in the bearings of the first bracket. When the second bracket moves away from the first bracket, the roll shaft can remain on the first bracket, and the roll sleeve can be disengaged from the roll shaft.

[0015] Further, the distance between adjacent straightening roll sets is greater than 410 mm and less than 800 mm. Since both ends of the straightening roll are respectively mounted in the first bracket and the second bracket. Compared with a cantilever straightening machine, the structure at the connection between the straightening roll and the bracket can be simplified, so that the distance between adjacent two straightening rolls can be reduced. The reduction of the distance between adjacent two straightening rolls is beneficial to the reduction of the overall length of the straightening machine and is convenient for realizing the miniaturized design of the straightening machine. Due to the reduction of the distance between adjacent two straightening rolls, during the straightening process, the reduction of the distance between the straightening rolls is beneficial to improving the straightening degree of the steel section and is beneficial to increasing the straightening speed. From the actual straightening effect, through the above adjustment, the straightening degree can reach 1.5 - 2 mm / m, and the straightening speed can reach 5 m / s.

[0016] Further, the multi-wire straightening machine for profiled steel bars further includes a pinch roller mechanism disposed on the feed side of the straightening roll set for arranging a plurality of profiled steel bars at intervals along the working length direction of the roll sleeve. The pinch roller mechanism includes pinch rollers and a comb plate disposed above the pinch rollers. By providing the pinch roller mechanism and in cooperation with the multi-wire straightening by the straightening machine, the feeding speed of a plurality of profiled steel bars simultaneously is increased, manual intervention is reduced, and the processing efficiency is further improved.

[0017] Further, a plurality of positioning pins are provided on the transfer cart, and positioning holes mating with the positioning pins are provided on the material frame. The material frame is inserted into the positioning pins through the positioning holes. Specifically, four positioning pins can be provided on the transfer cart, and the four positioning pins respectively correspond to the four positioning holes at the four corners of the material frame. It can be conceived that positioning holes can also be provided on the transfer cart, and positioning pins corresponding to the positioning holes can be provided at the bottom of the material frame.

[0018] A positioning structure composed of positioning pins and positioning holes is provided between the transfer cart and the material frame. This positioning structure is simple and convenient to process. By providing this positioning structure, when the transfer cart transfers the material frame, the transfer cart and the material frame can be kept relatively stationary, the shaking of the material frame can be avoided, and the safety is improved. Moreover, the cooperation of the positioning pins and the positioning holes is beneficial to the socketing and separation between the transfer cart and the material frame. That is, after the material frame is filled with the removed roll sleeves, the material frame can be separated from the transfer cart by means of hoisting extraction, so as to transport the removed roll sleeves away from the straightening machine area. After the material frame is filled with the roll sleeves to be replaced and installed, the material frame can be conveniently inserted onto the transfer cart, and then the transfer cart can transfer the roll sleeves to be replaced and installed to the designated installation position.

[0019] Further, a jacking mechanism for lifting the material frame is provided on the transfer cart. When the roll sleeve needs to be replaced, the material frame is jacked up by the jacking mechanism to contact the roll sleeve, so that during the separation of the roll sleeve from the roll shaft, the weight of the roll sleeve falls on the material frame, avoiding damage to the roll shaft.

[0020] More preferably, the jacking mechanism includes at least one jacking oil cylinder provided on the transfer cart. Specifically, four jacking oil cylinders can be provided on the transfer cart, and the four jacking oil cylinders are arranged in pairs opposite to each other, making the support of the jacking mechanism for the material frame more stable and reliable.

[0021] The material frame has a plurality of receiving grooves, and the distance between adjacent receiving grooves is the same as the distance between adjacent roller sleeves in the straightening roller set. Moreover, two clamping positions are provided in each receiving groove along the vertical direction. When a roller sleeve needs to be replaced, the lifting mechanism jacks up the material frame sleeved on the transfer cart upward until it contacts the roller sleeve, so that each roller sleeve is located on the corresponding clamping position in the material frame. At this time, the material frame is still inserted into the positioning pin of the transfer cart. Then, the second driving mechanism moves the second bracket away from the first bracket. At the same time, the second bracket drives the transfer cart to move synchronously, so that the material frame and the roller sleeves in the material frame also move away from the first bracket until the roller sleeves are completely separated from the roller shafts of the first bracket. Then, through the hoisting mechanism, the material frame together with the roller sleeves in the material frame is hoisted upward to separate the material frame from the transfer cart and transport the material frame away from the straightening machine area. On the contrary, when a newly updated roller sleeve needs to be installed, the updated roller sleeve is loaded into the material frame and sleeved on the transfer cart. The second driving mechanism drives the second bracket to move towards the first bracket. At the same time, the second bracket drives the transfer cart to move towards the first bracket synchronously, so that the material frame and the newly updated roller sleeves in the material frame also move towards the first bracket until the roller sleeves are sleeved on the designated installation positions on the roller shafts of the first bracket.

[0022] Further, the first driving mechanism includes a motor, a motor coupling connected to the output shaft of the motor, a gearbox connected to the motor coupling, a reduction box coupling connected to the gearbox, a distribution gearbox connected to the reduction box coupling, a distribution box coupling connected to the driven wheel in the distribution gearbox, and each distribution box coupling is connected to a corresponding first roller shaft. In this application, the gearbox is arranged on one side of the straightening roller set. Compared with the existing arrangement of the gearbox in the box body, the improved gearbox is more convenient for arrangement and maintenance.

[0023] Further, the distribution box coupling includes at least three safety couplings, and the safety couplings are connected to the first roller shafts near the feeding side. For example, if there are five roller shafts in the straightening machine, the first three roller shafts arranged on the feeding side are respectively connected to a safety coupling. The last two first roller shafts arranged on the discharging side are respectively connected to a common coupling. Specifically, the safety coupling can be a hydraulic safety coupling. The safety coupling can automatically separate from the distribution gearbox after exceeding the set torque, thus ensuring the safe use of the straightening machine. In the straightening machine, the first few roller shafts arranged on the feeding side mainly provide torque. Therefore, through actual use, it is known that connecting the first three roller shafts arranged on the feeding side to the safety couplings can not only meet the straightening requirements but also reduce the manufacturing cost of the straightening machine.

[0024] Further, the multi-wire straightening machine for profiled steel bars further includes an adjusting assembly. The adjusting assembly includes a horizontal adjusting mechanism connected to the first roller shaft and a vertical adjusting mechanism connected to the second roller shaft. After the first roller shaft is installed in the bracket, its position in the vertical direction is fixed. Through the horizontal adjusting mechanism, the position of the first roller shaft in the horizontal direction can be adjusted so that the first roller sleeve and the second roller sleeve are arranged opposite to each other. After the second roller shaft is installed in the bracket, its position in the horizontal direction is fixed. Through the vertical adjusting mechanism, the position of the second roller shaft in the vertical direction can be adjusted to adjust the distance between the corresponding first roller sleeve and the second roller sleeve. The vertical adjusting mechanism includes a plurality of jacks opposite to the second roller shaft and a driving screw connected to the jacks. The driving screw is used to control the jacks to adjust the position of the second roller shaft in the vertical direction.

[0025] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0026] 1. By setting the double-support structure of the first bracket and the second bracket, the straightening rollers are supported simultaneously from both sides of multiple groups of straightening roller sets, which can improve the bearing capacity of the straightening machine, make the equipment more durable, extend the service life of the equipment, and reduce the production cost.

[0027] 2. The working length of the roller sleeve is set to be 0.8 m to 1.2 m, so that multiple small-sized profiled steel bars with dimensions of 30 mm to 250 mm can be arranged side by side along the working length direction of the roller sleeve. And because the straightening machine has a double-support structure and the bearing capacity is enhanced, it can meet the requirement of straightening multiple small-sized profiled steel bars simultaneously, thereby improving the output of the straightening machine and the market competitiveness of the enterprise.

[0028] 3. By setting a sleeve-changing assembly on the base, the automatic sleeve-changing can be realized by using the sleeve-changing assembly, so that the roller shaft and the roller sleeve are separated, and the roller sleeve falls into the material box, reducing the workload of the staff and improving the efficiency of replacing the roller sleeve. It is found through actual operation that the sleeve-changing process can be shortened to within half an hour by this sleeve-changing assembly.

[0029] 4. Since both ends of the straightening roller are respectively mounted in the first bracket and the second bracket, compared with the cantilever straightening machine, the structure at the connection between the straightening roller and the bracket can be simplified, so that the distance between two adjacent straightening rollers can be reduced, which is beneficial to reducing the overall length of the straightening machine and facilitating the miniaturized design of the straightening machine. And during the straightening process, the reduction of the distance between the straightening rollers is beneficial to improving the bending degree and straightening speed of the profiled steel bars being straightened.

[0030] To make the above and other objects, features, and advantages of the utility model more obvious and understandable, the following specific preferred embodiments are given below and are described in detail in conjunction with the accompanying drawings. Description of the Drawings

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 is a schematic diagram of the main structure of the existing cantilever straightening machine in the background art of the present invention;

[0033] Figure 2 is a schematic diagram of the structure of the multi-line section steel straightening machine in the embodiment of the present invention;

[0034] Figure 3 is a top view of the multi-line section steel straightening machine in the embodiment of the present invention;

[0035] Figure 4 is a schematic diagram of the sleeve-changing assembly in the embodiment of the present invention.

[0036] Figure 5 is a schematic diagram of the connection between the adjusting assembly and the straightening roll in the embodiment of the present invention

[0037] Figure 6 is a schematic diagram of the connection between the pinch roller mechanism and the straightening roll group in the embodiment of the present invention

[0038] The reference numerals of the above drawings: 1, base; 21, first bracket; 22, second bracket; 3, straightening roll group; 31, first roll shaft; 32, second roll shaft; 33, first roll sleeve; 34, second roll sleeve; 4, first driving mechanism; 41, motor; 42, motor coupling; 43, gearbox; 44, reducer coupling; 45, distribution gearbox; 46, distribution box coupling; 51, transfer cart; 52, material frame; 53, second driving mechanism; 54, lifting oil cylinder; 61, horizontal adjusting mechanism; 62, vertical adjusting mechanism; 7, pinch roller mechanism. Detailed implementation manners

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0040] Embodiment 1: Refer to Figures 1 to 6As shown in the figure, a multi-line straightening machine for profiled steel is used for straightening profiled steel with a width of 30 mm to 250 mm. The multi-line straightening machine for profiled steel includes: a base 1, a support structure disposed on the base 1, multiple groups of straightening roll sets 3 mounted on the support structure, a first driving mechanism 4 connected to the straightening roll sets 3 for driving the straightening roll sets 3 to rotate, and a sleeve-changing assembly disposed on the base 1 and located below the straightening roll sets 3.

[0041] See Figure 2 , 3 As shown in the figure, the support structure includes a first bracket 21 and a second bracket 22 oppositely disposed on the base 1. The first bracket 21 is fixedly connected to the base 1, and the second bracket 22 is slidably connected to the base 1. A first guiding mechanism is provided between the second bracket 22 and the base 1. The first guiding mechanism extends along the arrangement direction of the first bracket 21 and the second bracket 22. The first guiding mechanism includes a first guide rail disposed on the base 1 and a first slider disposed at the bottom of the second bracket 22 and cooperating with the first guide rail. The second bracket 22 can move along the first guide rail towards or away from the first bracket 21.

[0042] The straightening machine of this application is mainly used for straightening small-sized profiled steel and includes five groups of straightening roll sets 3. The five groups of straightening roll sets 3 are arranged at intervals along the length direction of the first bracket 21 or the second bracket 22. Each group of straightening roll sets 3 includes a first straightening roll and a second straightening roll oppositely disposed in the vertical direction, and the first straightening roll is located above the second straightening roll. The first straightening roll includes a first roll shaft 31 and a first roll sleeve 33 sleeved on the first roll shaft 31. The second straightening roll includes a second roll shaft 32 and a second roll sleeve 34 sleeved on the second roll shaft 32. The roll shaft and the roll sleeve are in cooperative transmission through a conical surface and a keyway. A straightening area for accommodating the profiled steel to be straightened is formed between the first roll sleeve 33 and the second roll sleeve 34 oppositely disposed in the vertical direction. Many grooves are formed on the surface of the roll sleeve according to the specifications of the profiled steel, and different grooves correspond to straightening different products. The grooves on the first roll sleeve 33 and the second roll sleeve 34 correspond to each other, and the types of grooves include angle steel, channel steel, I-beam, etc. Bearings are provided in the first bracket 21, and one end of the straightening roll is disposed in the bearings of the first bracket 21. A hydraulic locking nut or a mechanical nut is provided at the end of the straightening pipe to lock it with the bracket. When the second bracket 22 moves away from the first bracket 21, the roll shaft can remain on the first bracket 21, and the roll sleeve can be detached from the roll shaft.

[0043] The working length of the roll sleeve is 0.8 m to 1.2 m. The working length refers to the width of the part of the roll sleeve that contacts the steel section to be straightened and is used for straightening the steel section to be straightened. Setting the working length of the roll sleeve to 0.8 m to 1.2 m can meet the requirement of arranging multiple small steel sections simultaneously without exceeding the support strength range of the bracket and the driving capacity of the driving mechanism, and realize the simultaneous straightening of multiple small steel sections.

[0044] See Figure 3 As shown, the first driving mechanism 4 includes a motor 41, a motor coupling 42 connected to the output shaft of the motor 41, a gearbox 43 connected to the motor coupling 42, a reduction box coupling 44 connected to the gearbox 43, a distribution gearbox 45 connected to the reduction box coupling 44, a distribution box coupling 46 connected to the driven wheel in the distribution gearbox 45, and each distribution box coupling 46 is connected to a corresponding first roller shaft 31. In this application, the gearbox 43 is arranged on one side of the straightening roller set 3. Compared with the existing arrangement of the gearbox 43 in the box body, the improved gearbox 43 is more convenient for arrangement and maintenance.

[0045] In a possible implementation manner, the distribution box coupling 46 includes three safety couplings, and the safety couplings are connected to the first roller shafts 31 near the feeding side. Specifically, the safety couplings can be hydraulic safety couplings. The safety couplings can automatically separate from the distribution gearbox 4543 after exceeding the set torque, thus ensuring the safe use of the straightening machine. In the straightening machine, the torque is mainly provided by the first few roller shafts arranged on the feeding side. Therefore, through actual use, it is known that connecting the first three roller shafts arranged on the feeding side to the safety couplings can not only meet the straightening requirements but also reduce the manufacturing cost of the straightening machine.

[0046] See Figure 4 As shown, the sleeve changing assembly includes a transfer cart 51 connected to the second bracket 22, a material frame 52 detachably arranged on the transfer cart 51, and a second driving mechanism 53 arranged on the base 1 and connected to the second bracket 22. The second driving mechanism 53 is an oil cylinder. The second driving mechanism 53 can drive the second bracket 22 to move, so as to drive the roll sleeve to separate from the roller shaft and make the roll sleeve fall into the material frame 52.

[0047] One side of the transfer cart 51 opposite to the second support 22 is fixedly connected to the second support 22 through a pin shaft. A second guiding structure is provided between the transfer cart 51 and the base 1. The second guiding structure includes a second guide rail provided on the base 1 and a second slider provided at the bottom of the transfer cart 51 and mating with the second guide rail. The second guide rail is arranged parallel to the first guide rail. Four positioning pins are provided on the top of the transfer cart 51, and the four positioning pins respectively correspond to four positioning holes at the four corners of the material frame 52. A positioning structure composed of positioning pins and positioning holes is provided between the transfer cart 51 and the material frame 52. This positioning structure is simple and convenient to process. By providing this positioning structure, when the transfer cart 51 transfers the material frame 52, the transfer cart 51 and the material frame 52 can be kept relatively stationary, avoiding shaking of the material frame 52 and improving safety. Moreover, the cooperation of the positioning pins and the positioning holes is beneficial to the socketing and separation between the transfer cart 51 and the material frame 52. That is, after the material frame 52 is filled with the removed roll sleeves, the material frame 52 can be separated from the transfer cart 51 by means of hoisting extraction, so as to transport the removed roll sleeves away from the straightening machine area. After the material frame 52 is filled with the roll sleeves to be replaced and installed, the material frame 52 can be conveniently inserted onto the transfer cart 51, and then the transfer cart 51 transports the roll sleeves to be replaced and installed to the designated installation position.

[0048] The material frame 52 has five receiving grooves, and the distance between adjacent receiving grooves is the same as the distance between adjacent roll sleeves in the straightening roll group 3. Two clamping positions are provided in each receiving groove along the vertical direction. All the roll sleeves in the straightening machine can be loaded by one material frame 52. Thus, all the roll sleeves can be moved away from the straightening area by one handling, improving the transfer efficiency.

[0049] In a possible implementation manner, a jacking mechanism for lifting the material frame 52 is provided on the transfer cart 51. When the roll sleeves need to be replaced, the jacking mechanism jacks up the material frame 52 to contact the roll sleeves, so that during the separation of the roll sleeves from the roll shafts, the weight of the roll sleeves falls on the material frame 52, avoiding damage to the roll shafts.

[0050] The jacking mechanism includes four jacking cylinders 54 provided on the transfer cart 51. The four jacking cylinders 54 are arranged in pairs opposite to each other, making the support of the jacking mechanism for the material frame 52 more stable and reliable.

[0051] The process of replacing the roll sleeves of the multi-wire section steel straightening machine is as follows: In the initial state, the roll sleeves are sleeved on the corresponding straightening rolls, and the material box 52 is sleeved on the transfer cart 51 through the cooperation of the positioning holes and positioning pins, and is located below the straightening roll group 3. The receiving grooves of the material box 52 are respectively arranged opposite to the corresponding roll sleeves. The material box 52 sleeved on the transfer cart 51 is lifted by controlling the lifting oil cylinder 54 until it contacts the roll sleeves, so that each roll sleeve is located at the corresponding position in the material box 52. At this time, the material box 52 is still inserted into the positioning pin of the transfer cart 51. Then, the second driving mechanism 53 makes the second bracket 22 move away from the first bracket 21. At the same time, the second bracket 22 drives the transfer cart 51 to move synchronously, so that the material box 52 and the roll sleeves in the material box 52 also move away from the first bracket 21 until the roll sleeves are completely separated from the roll shafts of the first bracket 21. Then, through the hoisting mechanism, the material box 52 together with the roll sleeves in the material box 52 is lifted upward to separate the material box 52 from the transfer cart 51, and the material box 52 is transported away from the straightening machine area. On the contrary, when it is necessary to install the updated roll sleeves, the updated roll sleeves loaded by the material box 52 are sleeved on the transfer cart 51. The second driving mechanism 53 drives the second bracket 22 to move towards the first bracket 21. At the same time, the second bracket 22 drives the transfer cart 51 to move synchronously towards the first bracket 21, so that the material box 52 and the updated roll sleeves in the material box 52 also move towards the first bracket 21 until the roll sleeves are sleeved on the designated installation positions on the roll shafts of the first bracket 21. The lifting oil cylinder 54 drops, so that the material box 52 no longer contacts the roll sleeves 33 and 34. Finally, the mandrel nut is tightened to fix the second bracket 22, the roll shafts 31 and 32, the roll sleeves 33 and 34, and the first bracket 21 simultaneously.

[0052] See Figure 5 As shown, the multi-wire section steel straightening machine further includes an adjustment assembly. The adjustment assembly includes a horizontal adjustment mechanism 61 connected to the first roll shaft 31 and a vertical adjustment mechanism 62 connected to the second roll shaft 32. After the first roll shaft 31 is installed in the bracket, its position in the vertical direction is fixed. Through the horizontal adjustment mechanism 61, the position of the first roll shaft 31 in the horizontal direction can be adjusted so that the first roll sleeve 33 and the second roll sleeve 34 are arranged opposite to each other. After the second roll shaft 32 is installed in the bracket, its position in the horizontal direction is fixed. Through the vertical adjustment mechanism 62, the position of the second roll shaft 32 in the vertical direction can be adjusted to adjust the distance between the corresponding first roll sleeve 33 and the second roll sleeve 34. The vertical adjustment mechanism 62 includes a plurality of jacks opposite to the second roll shaft 32 and a driving screw connected to the jacks. The position of the second roll shaft 32 in the vertical direction is adjusted by controlling the jacks through the driving screw.

[0053] See Figure 6As shown, the multi-wire straightening machine for profiled steel further includes a pinch roll mechanism 7. The pinch roll mechanism 7 is arranged on the feeding side of the straightening roll group 3 and is used to arrange multiple profiled steels at intervals along the working length direction of the roll sleeve. The pinch roll mechanism 7 includes pinch rolls and a comb plate arranged above the pinch rolls. By arranging the pinch roll mechanism 7 and cooperating with the simultaneous multi-wire straightening using the straightening machine, the feeding speed of multiple profiled steels is increased, manual intervention is reduced, and the processing efficiency is further improved.

[0054] In a possible implementation manner, the distance between adjacent straightening roll groups 3 is 410 - 800 mm. Since both ends of the straightening rolls are respectively mounted in the first bracket 21 and the second bracket 22, the support strength is higher. Compared with a cantilever straightening machine, the structure at the connection between the straightening roll and the bracket can be simplified, and thus the distance between two adjacent straightening rolls can be reduced. The reduction of the distance between two adjacent straightening rolls is beneficial to the reduction of the overall length of the straightening machine and facilitates the realization of the miniaturized design of the straightening machine. Due to the reduction of the distance between two adjacent straightening rolls, during the straightening process, the reduction of the distance between the straightening rolls is beneficial to improving the straightening curvature of the profiled steel and is also beneficial to increasing the straightening speed. From the actual straightening effect, through the above adjustment, the straightening curvature of the profiled steel can reach 1.5 - 2 mm / m, and the straightening speed can reach 5 m / s.

[0055] In the present utility model, specific embodiments are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A multi-wire straightening machine for section steel, characterized in that: The multi-wire straightening machine for section steel is used for straightening section steel with a width of 30 mm to 250 mm. The multi-wire straightening machine for section steel comprises: A base, relative to a bracket disposed on the base, the bracket comprising a first bracket fixedly connected to the base, and a second bracket capable of moving toward or away from the first bracket; A plurality of straightening roller groups, wherein the straightening roller groups include a first roller shaft and a second roller shaft which are arranged opposite to each other, and the two ends of the roller shaft are respectively mounted on the first bracket and the second bracket, the first roller shaft is sleeved with a first roller sleeve, and the second roller shaft is sleeved with a second roller sleeve, and the working length of the roller sleeve is ≥0.8m; A first driving mechanism, the first driving mechanism is connected to the straightening roller group and is used to drive the straightening roller group to rotate; The sleeve changing assembly includes a transfer vehicle connected to the second bracket, a material frame detachably arranged on the transfer vehicle, and a second driving mechanism arranged on the base and connected to the second bracket; the second driving mechanism can drive the second bracket to move, thereby driving the roller sleeve to separate from the roller shaft and allowing the roller sleeve to fall into the material frame.

2. The multi-wire straightening machine for section steel according to claim 1, characterized in that: The working length of the roller sleeve is 0.8m to 1.2m.

3. The multi-wire straightening machine for section steel according to claim 1, characterized in that: It comprises five groups of straightening rollers which are arranged at intervals along the length direction of the bracket, and the intervals between adjacent straightening rollers are greater than 410 mm and less than 800 mm.

4. The multi-wire straightening machine for section steel according to claim 1, characterized in that: The multi-line straightening machine for steel sections also includes a clamping mechanism, which is arranged on the feed side of the straightening roller group and is used to arrange multiple steel sections at intervals along the working length direction of the roller sleeve. The clamping mechanism includes a clamping roller and a combing plate arranged above the clamping roller.

5. The multi-wire straightening machine for section steel according to claim 1, characterized in that: The transfer vehicle is provided with a plurality of positioning pins, the material frame is provided with positioning holes matched with the positioning pins, and the material frame is inserted into the positioning pins through the positioning holes.

6. The multi-wire straightening machine for section steel according to claim 1, characterized in that: The transfer vehicle is provided with a lifting mechanism for lifting the material frame.

7. The multi-wire straightening machine for section steel according to claim 6, characterized in that: The jacking mechanism includes at least one jacking cylinder arranged on the transfer vehicle.

8. The multi-wire straightening machine for section steel according to claim 1, characterized in that: The first driving mechanism includes a motor, a motor coupling connected to the output shaft of the motor, a gearbox connected to the motor coupling, a reduction box coupling connected to the gearbox, a distribution gearbox connected to the reduction box coupling, and a distribution box coupling connected to the driven wheel in the distribution gearbox, and each of the distribution box couplings is connected to a corresponding one of the first rollers.

9. The multi-wire straightening machine for section steel according to claim 8, characterized in that: The distribution box coupling includes at least three safety couplings, which are connected to the first roller shaft close to the feed side.

10. The multi-wire straightening machine for section steel according to claim 1, characterized in that: It also includes an adjustment component, which includes a horizontal adjustment mechanism connected to the first roller shaft and a vertical adjustment mechanism connected to the second roller shaft.

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