A frame type steel bar straightening device

Abstract

The present invention provides a frame-type steel bar straightening device, comprising an outer frame (3), a bearing seat (2) and a straightening wheel (8), characterized in that: a transmission member is arranged on the outer frame (3), the outer frame (3) is rotatably mounted on the bearing seat (2), the steel bar passes through the outer frame (3) from the central through hole formed at both ends of the outer frame (3), the straightening wheel (8) is movably arranged on the outer frame (3) in the direction toward and away from the steel bar, at least two straightening wheels (8) are arranged at intervals along the direction of the outer frame rotation center line (L1) and alternately press the steel bar, and the straightening wheel axis (L2) is perpendicular to the outer frame rotation center line (L1). The present invention greatly improves the straightening speed while ensuring the straightening quality, has low cost, long service life, convenient adjustment and maintenance, and low risk.

Description

Technical Field

[0001] The invention relates to a frame type steel bar straightening device, which is mainly used for straightening low carbon round steel bars and threaded steel bars, and belongs to the field of steel bar processing machinery. Background Art

[0002] The existing steel bar straightening machine straightening part structure is mainly as follows: straightening wheels (such as Figure 1 ), the straightening wheel axis L2 is usually arranged at a certain angle α (36-45°) relative to the outer frame rotation center line L1 (such as Figure 2 ), the outer frame has hollow shaft heads at both ends with bearing seats installed, and the hollow shaft head at the feed end is installed with a pulley; the steel bar is inserted from the hollow shaft head at the feed end, and the motor drives the outer frame pulley to rotate. Because the straightening wheels on both sides press the steel bar in an alternating manner, the straightening wheels rotate around the steel bar with the steel bar as the center during rotation, so as to straighten and deform the steel bar; in this process, the axis of the straightening wheel has a certain angle with the axis of rotation of the outer frame, and the spiral line generated during rotation pushes the steel bar to one end into the fixed-length cutting device, thereby achieving the purpose of straightening and cutting the steel bar.

[0003] The working principle of this straightening wheel tilt structure is: due to the tilted setting of the straightening wheel, it has the function of moving and straightening the steel bars when the outer frame rotates at high speed. The larger the angle between the axis line of the straightening wheel and the center line of the outer frame, the better the straightening effect and the slower the steel bar passing speed; conversely, the smaller the angle between the axis line of the straightening wheel and the center line of the outer frame, the worse the straightening effect and the faster the steel bar passing speed; the straightening wheel is tilted at 36-45°, and the straightening effect of the steel bars within this angle range takes into account both the straightening effect and the steel bar passing speed.

[0004] When this straightening assembly is working, the angle of the inclined straightening wheel determines the straightening quality and speed of the steel bars, and the straightening speeds of steel bars of different diameters are also different at the same rotation speed. Under the condition of ensuring the straightening quality (straightness) of the steel bars, the spiral thrust generated by the straightening wheel in one rotation makes the length of the steel bars to move (straighten) short, and the straightening efficiency is limited and low. In order to increase the straightening speed, the rotation speed of the entire outer frame must be increased to improve the straightening efficiency; while increasing the rotation speed, the large centrifugal force generated by the high speed of the outer frame will cause severe vibration to the equipment and the outer frame itself, seriously affecting the normal use of other components, and causing deformation or fracture damage to the outer frame after long-term use. The strength requirements for the structure and the bearing seats at both ends are very high; if parts fall off or break during the working process, it will cause serious damage to the equipment or cause serious personal injury to the operator, and even the risk of casualties. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a frame-type steel bar straightening device which can improve the steel bar straightening efficiency and effectively extend the working life while reducing the safety hazards to the operator.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a frame-type steel bar straightening device, comprising an outer frame, a bearing seat and a straightening wheel, wherein a transmission member is arranged on the outer frame, the outer frame is rotatably mounted on the bearing seat, the steel bar passes through the outer frame from the central through hole formed at both ends of the outer frame, the straightening wheel is movably arranged on the outer frame in the direction toward and away from the steel bar, at least two straightening wheels are arranged at intervals along the rotation center line direction of the outer frame and are staggered to press the steel bar, and the axis of the straightening wheel is perpendicular to the rotation center line of the outer frame. In an embodiment of the present invention, the outer frame is assembled on the bearing seat through bearings arranged at both ends thereof, and the central through holes at both ends of the outer frame are arranged in the shafts at both ends of the outer frame to form a hollow shaft. In other embodiments, bearings may not be required at both ends of the outer frame, for example, the entire outer frame is placed in two bearings at a relatively middle position, the outer frame acts as a rotating shaft, and a transmission mechanism is arranged on the outer frame, and at this time, the central through hole is directly opened on both ends of the outer frame. In the present invention, the movement of the straightening wheel toward and away from the steel bar is realized by a slide groove in the first embodiment, by a guide shaft in the second embodiment, and by a threaded connection in the fourth embodiment.

[0008] Preferably, the frame-type steel bar straightening device has at least one straightening wheel pair, and the straightening wheel pair includes two straightening wheels arranged opposite to each other up and down, and a hole for accommodating and limiting the steel bar is formed between the two straightening wheels of the straightening wheel pair. The hole is conducive to passing the steel bar before work, limiting the movement range of the steel bar and reducing vibration. In embodiments 1 to 3, the hole is formed between the two straightening wheels arranged opposite to each other up and down in the straightening wheel set, and in embodiment 4, the hole is formed between the two straightening wheels symmetrically arranged on the outer frame.

[0009] Preferably, the frame-type steel bar straightening device has at least one straightening wheel group, the straightening wheel group includes a straightening wheel slide seat, a straightening wheel pair composed of two straightening wheels arranged opposite to each other up and down, and a straightening wheel bearing; the straightening wheel slide seat is composed of a straightening wheel slide seat upper plate, a straightening wheel slide seat lower plate and a straightening wheel slide seat side plate; the two straightening wheels are installed between the two straightening wheel slide seat side plates in parallel with each other through the straightening wheel bearing; the straightening wheel slide seat can be installed in the outer frame so as to move toward and away from the steel bar. Because the straightening wheel group has two straightening wheels arranged opposite to each other up and down, when the straightening wheel group is staggered to press the steel bar, usually only one of the straightening wheels is used. When the straightening wheel that is often used is worn, the straightening wheel group can be turned around and another straightening wheel can be used, so that the frame-type straightening device of the present invention is more durable.

[0010] Preferably, a slide groove corresponding to the straightening wheel slide seat is provided in the outer frame, and the side plate of the straightening wheel slide seat is arranged in the corresponding slide groove, and an upper limit plate and a lower limit plate are respectively provided at both ends of the slide groove on the outer frame, and an adjustment screw is provided on the upper and lower limit plates, and the adjustment screw passes through the upper limit plate / lower limit plate and rests on the upper plate / lower plate of the straightening wheel slide seat.

[0011] Preferably, guide shafts are provided on the upper and lower plates of the straightening roller skate seat, and upper and lower limit plates are provided on the outer frame in the sliding direction of the straightening roller skate seat, and the straightening roller skate seat is located between the upper and lower limit plates; holes matching the guide shafts are provided on the upper and lower limit plates, and the guide shafts pass through the upper and lower limit plates through the holes; adjustment screws are respectively provided on the upper and lower limit plates, and threaded holes corresponding to the adjustment screws are respectively provided on the upper and lower limit plates, and the adjustment screws pass through the threaded holes of the upper and lower limit plates and rest against the upper and lower plates of the straightening roller skate seat.

[0012] In order to facilitate the inspection of the distance of the straightening wheel squeezing the steel bars and to facilitate adjustment, a ruler is provided on the straightening wheel slide seat, and the ruler is provided on the upper plate of the straightening wheel slide seat and / or the lower plate of the straightening wheel slide seat, and the upper limit plate and / or the lower limit plate are provided with a hole for the ruler to pass through.

[0013] Preferably, the straightening wheel bearings are arranged on both sides of the straightening wheel and fixed on the side plates of the straightening wheel slide seat, and the rotating shafts connected to the two ends of the straightening wheel are assembled with the straightening wheel bearings.

[0014] Preferably, the straightening wheel bearings are arranged in bearing holes formed on both sides of the straightening wheel, and the shaft matched therewith passes through the straightening wheel and is fixedly connected to the two straightening wheel slide seat side plates on both sides.

[0015] Preferably, the axis lines of the two straightening wheels in the straightening wheel group are perpendicular to the side plates of the straightening wheel sliding seat, and the sliding groove is perpendicular to the rotation center line of the outer frame.

[0016] Preferably, the axis lines of the two straightening wheels in the straightening wheel group are perpendicular to the side plates of the straightening wheel slide seat, and the guide shaft is perpendicular to the rotation center line of the outer frame.

[0017] Preferably, the outer frame is assembled on the bearing seat through hollow shafts arranged at both ends of the outer frame, the steel bars pass through the outer frame through the hollow shafts, and a pulley is arranged on the hollow shaft head at one end of the outer frame.

[0018] Preferably, the straightening roller skate seat upper plate and / or the straightening roller skate seat lower plate are detachably fixedly connected to the straightening roller skate seat side plates.

[0019] Preferably, the upper limit plate and / or the lower limit plate can be detachably fixed on the outer frame.

[0020] Preferably, the angle between the axis of the straightening wheel and the rotation centerline of the outer frame is 90±2°. At this time, when the straightening device is working, the spiral force generated by the outer frame on the steel bar is very small and can be basically ignored, and the resistance generated is also very small. The moving speed of the steel bar is mainly controlled by the external traction device, which basically achieves independent control of the straightening and the straightening speed, better guarantees the straightening quality (straightness) and greatly improves the straightening speed.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention provides a frame-type steel bar straightening device, in which an outer frame is rotatably set on a bearing seat, at least two straightening wheels are arranged at intervals along the rotation center line of the outer frame and alternately press the steel bars, and the axis of the straightening wheel is perpendicular to the rotation center line of the outer frame, so that the outer frame does not generate spiral thrust on the steel bars during the rotation of the outer frame during operation, and the steel bar moving speed is controlled by an externally arranged traction device, so that the straightening and straightening speed are independently controlled, and the straightening quality (straightness) is better guaranteed and the straightening speed is greatly improved. The present invention does not need to increase the rotation rate of the outer frame in order to increase the straightening speed like the prior art, and has low requirements on the strength of the material, low manufacturing cost, and parts are not easy to be damaged. The maintenance cost is low, the service life is long, and the risk is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of an existing steel bar straightening device;

[0024] Figure 2 It is a three-dimensional diagram of an existing steel bar straightening device;

[0025] Figure 3 This is a front view of a frame-type steel bar straightening device according to an embodiment of the present invention;

[0026] Figure 4 for Figure 3 A cross-sectional view of the steel bar straightening device shown;

[0027] Figure 5 for Figure 3 A top view of the steel bar straightening device shown;

[0028] Figure 6 It is a three-dimensional cross-sectional view of a steel bar straightening device according to Embodiment 1;

[0029] Figure 7 It is a cross-sectional view of the steel bar straightening device of Example 2;

[0030] Figure 8 It is a cross-sectional view of the steel bar straightening device of Example 3;

[0031] Fig. 9 It is a front view of the steel bar straightening device of Embodiment 4;

[0032] Fig.10 for Fig. 9 AA cross-sectional view of the steel bar straightening device shown.

[0033] Explanation of the reference numerals: 1-pulley, 2-bearing seat, 3-outer frame, 4-upper limit plate, 4'-lower limit plate, 5-adjusting screw, 6-ruler, 7-upper plate of straightening wheel slide seat, 7'-lower plate of straightening wheel slide seat, 8-straightening wheel, 9-straightening wheel bearing, 10-side plate of straightening wheel slide seat, 11-guide shaft, 12-slide groove. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1

[0036] like Figure 3-Figure 6 As shown, the present invention provides a frame-type steel bar straightening device, which includes a pulley 1, a bearing seat 2, and an outer frame 3. Hollow shafts are provided at both ends of the outer frame 3. The outer frame 3 is assembled on the bearing seat 2 through the hollow shafts. The steel bar passes through the outer frame 3 through the hollow shafts at both ends of the outer frame 3. A pulley 1 is provided on the shaft head of the hollow shaft at one end. The pulley 1 is connected to the output end of the external power device. In this embodiment, the bearing seat 2 is located at both ends of the outer frame 3, and the transmission member pulley 1 is arranged on the shaft head at one end of the bearing seat. In other embodiments, the bearing seat 2 can also be arranged in a relatively middle position to keep the outer frame 3 balanced. The pulley 1 can also be arranged between the two bearing seats 2. The transmission member can be driven by gears, sprockets, screws, couplings, etc. instead of pulleys. No invention is made without limitation, as long as the outer frame 3 is rotatably mounted on the bearing seat 2.

[0037] like Figure 6 As shown, six straightening wheel groups A, B, C, D, E, and F are arranged on the outer frame, and the straightening wheel group includes a straightening wheel slide seat, two straightening wheels 8 arranged opposite to each other up and down, and a straightening wheel bearing 9. Figure 4As shown, the straightening roller seat is composed of a straightening roller seat upper plate 7, a straightening roller seat lower plate 7' and two straightening roller seat side plates 10; specifically in this embodiment, the straightening wheel upper plate 7 and the straightening wheel lower plate 7' are detachably fixed to the straightening wheel side plates 10 by screws, which is convenient for installing and replacing the straightening wheels; in other embodiments, the straightening wheel seat can be welded or integrally formed. The two straightening wheels 8 are installed parallel to each other between the two straightening wheel seat side plates 10 through the straightening wheel bearings 9 and are perpendicular to the two straightening wheel seat side plates 10. Specifically in this embodiment, the straightening wheel bearings 9 are arranged on both sides of the straightening wheel 8 and fixed on the straightening wheel seat side plates 10, and the rotating shafts connected to the two ends of the straightening wheel 8 are assembled with the straightening wheel bearings 9, and the axis lines of the two straightening wheels are perpendicular to the straightening wheel seat side plates 10. Six groups of slide grooves 12 corresponding to the straightening wheel slide seats are arranged in the outer frame 3, and the side plates 10 of the straightening wheel slide seats on both sides of the six groups of straightening wheel groups are respectively arranged in the corresponding slide grooves 12 on both sides, and the slide grooves 12 are arranged perpendicular to the rotation center line L1 of the outer frame. Because the two straightening wheels 8 in the straightening wheel group are perpendicular to the two straightening wheel slide seat side plates 10, and the straightening wheel slide seat side plates 10 are installed in the slide grooves 12 perpendicular to the rotation center line L1 of the outer frame, the two straightening wheel axis lines L2 of the straightening wheel group are perpendicular to the rotation center line L1 of the outer frame. The upper limit plate 4 and the lower limit plate 4' are respectively arranged at both ends of the slide groove 12 on the outer frame 3. Specifically in this embodiment, the upper and lower limit plates 4, 4' are detachably fixed to the outer frame 3 by screws. The upper and lower limit plates 4, 4' are respectively provided with adjustment screws 5, and the upper and lower limit plates 4, 4' are respectively provided with threaded holes corresponding to the adjustment screws 5, and the adjustment screws 5 pass through the threaded holes of the upper limit plate 4 / lower limit plate 4' and abut against the upper plate 7 / lower plate 7' of the straightening wheel slide seat. By turning the adjustment screws 5 on the upper limit plate 4 and the lower limit plate 4' in the same direction and by the same distance, the straightening wheels 8 of the straightening wheel group can be moved toward and away from the steel bar. The slide groove 12 of this embodiment is perpendicular to the center line L1 of the outer frame, and it may not be perpendicular in other embodiments, as long as the axis L2 of the straightening wheel is perpendicular to the rotation center line L1 of the outer frame.

[0038] Six straightening wheel groups are arranged at intervals along the rotation center line L1 of the outer frame. A hole for accommodating and limiting the steel bar is formed between the two straightening wheels 8 arranged opposite to each other up and down. The hole is conducive to passing the steel bar before work, limiting the movement range of the steel bar and reducing vibration. The holes for the steel bar to pass between the two straightening wheels 8 of the straightening wheel group are staggered on the upper and lower sides of the rotation center line L1 of the outer frame, and staggered to press the steel bar passing through the outer frame. Specifically, combined with Figure 3 and Figure 6As shown, the hole between the two straightening wheels of the straightening wheel group A for the steel bars to pass through is located above the rotation centerline of the outer frame, squeezing the steel bars downward; the hole between the two straightening wheels of the straightening wheel group B for the steel bars to pass through is located below the rotation centerline of the outer frame, squeezing the steel bars upward; the hole between the two straightening wheels of the straightening wheel group C for the steel bars to pass through is located above the rotation centerline of the outer frame, squeezing the steel bars downward…, the straightening wheel groups A, B, C, D, E, and F squeeze the steel bars alternately, and the adjacent straightening wheel groups press the steel bars in opposite directions.

[0039] like Figure 4 As shown, a hole for the ruler 6 to pass through is provided on the upper limit plate 4 and / or the lower limit plate 4', and the ruler 6 is provided on the upper plate 7 and / or the lower plate 7' of the straightening roller skate seat. The ruler 6 passes through the holes for the ruler 6 to pass through on the upper limit plate 4 and / or the lower limit plate 4' and passes through the corresponding limit plates.

[0040] Embodiment 2

[0041] The difference between this embodiment and the first embodiment is that: Figure 7 As shown, the upper plate 7 and the lower plate 7' of the straightening roller skate seat are provided with a guide shaft 11 perpendicular to the rotation center line L1 of the outer frame, and the outer frame 3 is provided with upper and lower limit plates 4, 4' in the sliding direction of the straightening roller skate seat. Specifically, in this embodiment, the upper and lower limit plates 4, 4' are detachably fixed to the outer frame 3 by screws, and the straightening roller skate seat is located between the upper and lower limit plates 4, 4'. The upper and lower limit plates 4, 4' are provided with light holes that match the guide shaft 11, and the guide shaft 11 can slide in the light holes, and the guide shaft 11 passes through the upper and lower limit plates 4, 4' through the light holes. The upper and lower limit plates 4, 4' are respectively provided with adjustment screws 5, and the upper and lower limit plates 4, 4' are respectively provided with threaded holes corresponding to the adjustment screws 5, and the adjustment screws 5 pass through the threaded holes of the upper limit plate 4 / lower limit plate 4' and abut against the upper plate 7 / lower plate 7' of the straightening wheel slide seat. By turning the adjustment screws 5 on the upper limit plate 4 and the lower limit plate 4' in the same direction and the same distance, the straightening wheels 8 of the straightening wheel group can be moved toward and away from the steel bars. Of course, the guide shaft 11 may not be perpendicular to the rotation center line L1 of the outer frame, as long as the straightening wheel axis L2 is perpendicular to the rotation center line L1 of the outer frame. The use of the guide shaft 11 structure can omit the slide groove 12 corresponding to the straightening wheel slide seat in the outer frame in the first embodiment. A scale 6 is also provided on the upper plate 7 and / or the lower plate 7' of the straightening roller skate seat, and a hole for the scale 6 to pass through is correspondingly provided on the upper limit plate 4 and / or the lower limit plate 4', and the scale 6 passes through the upper limit plate 4 and / or the lower limit plate 4' for easy inspection. The rest of the parts are the same as those in the first embodiment and will not be described in detail.

[0042] Embodiment 3

[0043] like Figure 8 As shown, the difference between this embodiment and the first embodiment is that the straightening wheel bearing 9 is arranged in the bearing holes formed on both sides of the straightening wheel, and the shaft matched with it passes through the straightening wheel and is fixedly connected to the two straightening wheel sliding seat side plates 10 on both sides. The rest of the parts are the same as the first embodiment and will not be repeated. The arrangement of the straightening wheel bearing 9 and the shaft in this embodiment is also applicable to the second embodiment.

[0044] Embodiment 4

[0045] like Fig. 9 and Fig.10 As shown, the present invention provides a frame-type steel bar straightening device, which includes a pulley 1, a bearing seat 2, and an outer frame 3. Hollow shafts are provided at both ends of the outer frame 3. The outer frame 3 is assembled on the bearing seat 2 through the hollow shafts. The steel bars pass through the outer frame through the hollow shafts at both ends of the outer frame 3. A pulley 1 is provided on the shaft head of the hollow shaft at one end, and the pulley 1 is connected to the output end of an external power device.

[0046] A plurality of straightening wheels are arranged in the outer frame, and the straightening wheels are arranged at intervals along the rotation center line L1 of the outer frame and are staggered to press the steel bars. Specifically, the straightening wheels are arranged alternately up and down, and adjacent straightening wheels squeeze the steel bars in opposite directions. The straightening wheel axis L2 is perpendicular to the rotation center line L1 of the outer frame. The straightening wheel is connected to the outer frame by a thread, and the straightening wheel can be moved toward and away from the steel bar by twisting the straightening wheel.

[0047] Furthermore, the straightening wheels can be symmetrically arranged on the outer frame, and a hole for accommodating the limiting steel bars is formed in the middle of a pair of symmetrical straightening wheels, which is conducive to threading the steel bars before work, limiting the movement range of the steel bars and reducing vibration.

[0048] Furthermore, the straightening wheels of this embodiment can also be used in combination with the straightening wheel groups in embodiments one, two and three. Multiple straightening wheels and straightening wheel groups are arranged in the outer frame. The axis lines of the straightening wheels and the straightening wheel groups are perpendicular to the rotation center line of the outer frame. The straightening wheels and the straightening wheels in the straightening wheel groups are staggered to press the steel bars.

[0049] During operation, the outer frame pulley 1 is connected to the output end of the motor through a belt, and the steel bar passes through the hollow shaft head at the feed end through the external traction device, passes through each straightening wheel or straightening wheel group, and then passes out from another hollow shaft head. According to the needs, the adjustment screws 5 on the upper and lower limit plates 4, 4' at both ends of the straightening wheel group A, B, C, D, E, and F are symmetrically rotated with reference to the scale 6 to move the straightening wheel group, or the straightening wheel is rotated so that the straightening wheel presses the steel bar to deform it. The motor drives the outer frame pulley 1 to rotate; because the straightening wheels on both sides press the steel bar in an staggered manner, the straightening wheels rotate around the steel bar during rotation, so that the steel bar is straightened and deformed; the feeding speed of the steel bar in this process is basically determined by the traction speed of the external traction device, and the rotation of the outer frame only straightens the steel bar.

[0050] The present invention provides a frame-type steel bar straightening device, wherein at least two straightening wheels are arranged at intervals along the rotation center line of the outer frame and are staggered to press the steel bars, and the axis of the straightening wheels is perpendicular to the rotation center line of the outer frame. Before work, the straightening wheel group is adjusted to move along the slide groove or guide shaft direction in the frame, or the straightening wheels are adjusted to move relative to the outer frame to stagger and press the steel bars. During work, the outer frame rotates to straighten the steel bars, and the outer frame generates no or basically no spiral thrust on the steel bars during the process. The moving speed of the steel bars is controlled by an external traction device. Independent control of straightening and straightening speed is achieved, which better guarantees the straightening quality (straightness) and greatly improves the straightening speed. The entire structure is simple, has good strength, low material strength requirements, parts are not easy to damage, low cost, and long service life. It effectively improves processing efficiency while ensuring processing quality, and reduces and minimizes safety hazards.

Claims

1. A frame type steel bar straightening method, characterized in that: A frame-type steel bar straightening device is used for straightening, wherein the frame-type steel bar straightening device comprises a plurality of straightening wheel groups, each straightening wheel group comprises two straightening wheels (8) arranged opposite to each other; During straightening, the steel bar passes through the frame-type steel bar straightening device and passes between two straightening wheels (8) in each group of straightening wheel groups; when the frame-type steel bar straightening device is rotated, each straightening wheel (8) rotates around the steel bar, and the straightening wheels (8) on both sides press the steel bar in an interlaced manner to straighten the steel bar; wherein, during the straightening process, the feeding speed of the steel bar is determined by the traction speed of the external traction device; when the straightening wheel (8) that is frequently used is worn, the straightening wheel group can be turned around and another straightening wheel (8) can be used; The frame-type steel bar straightening device also includes an outer frame (3) and a bearing seat (2); The outer frame (3) is provided with a transmission member, the outer frame (3) is rotatably mounted on the bearing seat (2), and the steel bars pass through the outer frame (3) from the central through holes formed at both ends of the outer frame (3); A plurality of straightening wheel groups are arranged at intervals along the direction of the rotation center line (L1) of the outer frame and are staggered to press the steel bars against each other; the straightening wheel group comprises a straightening wheel pulley seat, a straightening wheel pair consisting of two straightening wheels (8) arranged opposite to each other up and down, and a straightening wheel bearing (9); the straightening wheel pulley seat comprises a straightening wheel pulley seat upper plate (7), a straightening wheel pulley seat lower plate (7') and a straightening wheel pulley seat side plate (10); the two straightening wheels (8) are mounted parallel to each other via the straightening wheel bearing (9). A hole for accommodating a restraining steel bar is formed between the two straightening wheel slide seat side plates (10) and between the two straightening wheels (8), and the straightening wheel axis centerline (L2) is perpendicular to the outer frame rotation centerline (L1); the two straightening wheels (8) are installed in the outer frame (3) so as to be able to move upward or downward synchronously; wherein the holes for the steel bars to pass between the two straightening wheels (8) of the adjacent straightening wheel groups are staggered at the upper and lower sides of the outer frame rotation centerline (L1), and staggeredly press the steel bars passing through the outer frame.

2. The frame type steel bar straightening method according to claim 1, characterized in that: A slide groove (12) corresponding to the straightening wheel slide seat is arranged in the outer frame, and the straightening wheel slide seat side plate (10) is arranged in the corresponding slide groove (12). An upper limit plate (4) and a lower limit plate (4') are respectively arranged at both ends of the slide groove (12) on the outer frame (3); an adjustment screw (5) is respectively arranged on the upper limit plate (4) and the lower limit plate (4'), and a threaded hole corresponding to the adjustment screw (5) is respectively arranged on the upper limit plate (4) and the lower limit plate (4'), and the adjustment screw (5) passes through the threaded hole of the upper limit plate (4) or the lower limit plate (4') and abuts against the straightening wheel slide seat upper plate (7) or the straightening wheel slide seat lower plate (7').

3. The frame type steel bar straightening method according to claim 1, characterized in that: The straightening roller sled upper plate (7) and the straightening roller sled lower plate (7') are provided with a guide shaft (11); the outer frame (3) is provided with an upper limit plate (4) and a lower limit plate (4') on both sides of the straightening roller sled sliding direction, respectively; the straightening roller sled is located between the upper limit plate (4) and the lower limit plate (4'); the upper limit plate (4) and the lower limit plate (4') are provided with holes that match the guide shaft (11); the guide shaft (11) ) passes through the upper limit plate (4) or the lower limit plate (4') through this hole; the upper limit plate (4) and the lower limit plate (4') are respectively provided with an adjusting screw (5), and the upper limit plate (4) and the lower limit plate (4') are respectively provided with a threaded hole corresponding to the adjusting screw (5); the adjusting screw (5) passes through the threaded hole of the upper limit plate (4) or the lower limit plate (4') and abuts against the upper plate (7) or the lower plate (7') of the straightening roller slide seat.

4. The frame type steel bar straightening method according to claim 2, characterized in that: A scale (6) is provided on the straightening roller skate seat, and the scale (6) is arranged on the straightening roller skate seat upper plate (7) and / or the straightening roller skate seat lower plate (7'), and a hole for the scale (6) to pass through is provided on the upper limit plate (4) and / or the lower limit plate (4').

5. The frame type steel bar straightening method according to claim 3, characterized in that: A scale (6) is provided on the straightening roller skate seat, and the scale (6) is arranged on the straightening roller skate seat upper plate (7) and / or the straightening roller skate seat lower plate (7'), and a hole for the scale (6) to pass through is correspondingly provided on the upper limit plate (4) and / or the lower limit plate (4').

6. The frame type steel bar straightening method according to claim 1, characterized in that: The straightening wheel bearings (9) are arranged on both sides of the straightening wheel (8) and fixed on the straightening wheel slide seat side plates (10), and the rotating shafts connected to the two ends of the straightening wheel (8) are assembled with the straightening wheel bearings (9).

7. The frame type steel bar straightening method according to claim 1, characterized in that: The straightening wheel bearing (9) is arranged in bearing holes formed on both sides of the straightening wheel, and a shaft matched therewith passes through the straightening wheel (8) and is fixedly connected to two straightening wheel slide seat side plates (10) on both sides.

8. The frame type steel bar straightening method according to claim 4, characterized in that: The axis centers of the two straightening wheels in the straightening wheel group are perpendicular to the straightening wheel slide seat side plates (10), and the slide groove (12) is perpendicular to the outer frame rotation center line (L1).

9. The frame type steel bar straightening method according to claim 5, characterized in that: The axis centers of the two straightening wheels in the straightening wheel group are perpendicular to the side plates (10) of the straightening wheel slide seat, and the guide shaft (11) is perpendicular to the rotation center line (L1) of the outer frame.

10. The frame type steel bar straightening method according to claim 1, characterized in that: The outer frame (3) is assembled on the bearing seat (2) via hollow shafts arranged at both ends of the outer frame (3); the steel bar passes through the outer frame (3) via the hollow shaft; and a pulley (1) is arranged on the hollow shaft head at one end of the outer frame.

11. The frame type steel bar straightening method according to claim 1, characterized in that: The straightening roller skate seat upper plate (7) and / or the straightening roller skate seat lower plate (7') are detachably fixedly connected to the straightening roller skate seat side plates (10).

12. The frame type steel bar straightening method according to claim 4, characterized in that: The upper limit plate (4) and / or the lower limit plate (4') are detachably fixed on the outer frame (3).

13. The frame type steel bar straightening method according to claim 5, characterized in that: The upper limit plate (4) and / or the lower limit plate (4') are detachably fixed on the outer frame (3).

14. The frame type steel bar straightening method according to any one of claims 1 to 13, characterized in that: The angle between the straightening wheel axis (L2) and the outer frame rotation center line (L1) is 90±2°.

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