A straightening device and a straightening method for a long guide rail with a complex cross section

Abstract

The present application relates to a kind of straightening device for complex section long guide rail, belong to straightening field.It includes pressure mechanism: with the pressure head that can press down, the maximum deflection position of guide rail straightening face on pressure platform is pressed down and straightened;Conveying mechanism: guide rail is conveyed to the pressure platform of pressure mechanism;Deflection detection mechanism: the deflection of guide rail current straightening face is detected to obtain at least one maximum deflection position;Positioning mechanism: the conveying distance of guide rail on conveying mechanism is detected, and accordingly control the conveying of conveying mechanism to guide rail makes maximum deflection position be conveyed to pressure platform in turn;Turnover mechanism: overturn guide rail makes multiple planes of guide rail be turned in turn and be used as straightening face upwards.This application straightening device overall structure is compact, can realize the automatic straightening of long guide rail.Straightening process separates deflection detection and pressure action, can effectively improve straightening accuracy, while reducing the input of artificial, reduce worker labor intensity.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of straightening of linear guide rails, and particularly relates to a straightening device for long guide rails. BACKGROUND

[0002] Most enterprises straighten linear guide rails manually, measure the bending degree of the guide rail by using a feeler gauge, manually control a press to provide pressure, and control the amount of pressing by experience to straighten the guide rail.

[0003] A patent document with the Chinese patent number 201510452032.X discloses a full-automatic linear guide rail straightening device, which is characterized by movable pressure heads, effectively improved efficiency, and two end turnover units capable of quickly realizing turnover, but the parallelism between the lifting units cannot be guaranteed, and the device is suitable for straightening workpieces with moderate length and weight.

[0004] A patent document with the Chinese patent number 201811487737.5 discloses a full-automatic guide rail straightening machine, which is characterized by guaranteed relative position accuracy of the pressure points and support points of the device, and the ability to realize fine adjustment of pressure, but needs to rely on manual measurement, marking and installation adjustment of the workpiece.

[0005] A patent document with the Chinese patent number 201811137563.X discloses a guide rail straightening device, which is characterized by the ability to complete feeding, detection and pressure application integration, and the use of synchronous detection during the conveying process to improve efficiency, but does not provide an automatic turnover device, and needs to manually turn over and adjust the remaining surface. SUMMARY

[0006] The application aims to solve the technical problem of the prior art, and provides a straightening device for long guide rails, which reduces the labor intensity of workers and improves the straightening accuracy.

[0007] The application adopts the technical scheme of a straightening device for long guide rails with complex cross sections, which comprises a pressure application mechanism, a conveying mechanism, a deflection detection mechanism and a position detection mechanism.

[0008] As one of the preferred embodiments of the present application, the pressing platform of the pressing mechanism is connected with the conveying mechanism, a pair of guide blocks are arranged on the pressing platform, a guide track entrance is formed between the two guide blocks, the conveying mechanism conveys the guide track to the pressing platform, the guide track is guided to the pressing platform through the guide track entrance and can be just located at the pressing position.

[0009] As one of the preferred embodiments of the present application, a detection platform is arranged on one side of the conveying mechanism, the deflection detection mechanism is arranged relative to the detection platform, the guide track is horizontally arranged on the detection platform, the deflection detection mechanism detects the deflection of the straightening surface of the guide track relative to the detection platform, and the detection platform can support the guide track in the whole length direction to avoid the deflection detection of the guide track being interfered by the gravity factor.

[0010] As one of the preferred embodiments of the present application, the deflection detection mechanism comprises a non-resistance pneumatic motion slider, a horizontal plate, a first probe and a second probe, the horizontal plate is arranged on the non-resistance pneumatic motion slider and can move up and down, the first probe and the second probe are arranged on the horizontal plate, the non-resistance pneumatic motion slider hovers on the detection platform and can slide along the extension direction of the detection platform, when the guide track is horizontally arranged on the detection platform, the first probe is used to measure the distance between the first probe and the detection platform in the whole length direction, and at the same time, the second probe is used to measure the distance between the second probe and the straightening surface of the guide track, so as to obtain the whole length deflection of the straightening surface of the guide track relative to the detection platform.

[0011] As one of the preferred embodiments of the present application, the deflection detection mechanism comprises a stepping motor and a ball screw guide rail, the ball screw guide rail is vertically arranged and fixedly connected with the non-resistance pneumatic motion slider, the horizontal plate is fixedly connected with the slider of the ball screw guide rail, and the stepping motor acts on the ball screw guide rail to control the up and down displacement of the horizontal plate. The up and down displacement of the horizontal plate can drive the first probe and the second probe to move up and down, so as to adaptively adjust the detection height.

[0012] As one of the preferred embodiments of the present application, a pushing mechanism is further arranged on one side of the conveying mechanism and is used to push the guide track between the detection platform and the conveying mechanism. The pushing mechanism can be a pneumatic cylinder or the like, which pushes the guide track by the telescopic action of a telescopic shaft, and a magnet is preferably arranged at the front end of the telescopic shaft to attract the guide track.

[0013] As one of the preferred embodiments of the present application, a position measurement mechanism is arranged relative to the conveying mechanism, a laser range finder is used as a displacement sensor, which is used to measure the initial position of the guide track on the conveying mechanism and the displacement distance of the guide track relative to the initial position. According to this, the conveying progress of the conveying mechanism to the guide track is controlled, and the maximum deflection position on the straightening surface of the guide track is accurately controlled to reach the pressing position of the pressing platform to realize accurate pressing and straightening.

[0014] As one of the preferred embodiments of the present application, the overturning mechanism is arranged opposite to the conveying mechanism, and is used to overturn the guide rail on the conveying mechanism to switch the different straightening faces of the guide rail. The overturning mechanism comprises a connecting rod and an overturning crank. The connecting rod is driven (such as a cylinder drive) to act on the overturning crank, so that the overturning crank is overturned around the rotation axis between the first limit state and the second limit state. The guide rail is supported on the overturning crank, and the guide rail is overturned synchronously when the first limit state and the second limit state are switched to achieve the switching of the upward straightening face.

[0015] As one of the preferred embodiments of the present application, the overturning crank has a first limit side and a first limit plane. When the overturning crank is in the first limit state, the first limit side blocks the outer side of the guide rail to limit the moving position of the guide rail on the conveying mechanism. The overturning crank has a second limit side and a second limit plane. When the overturning crank is in the second limit state, the second limit side blocks the outer side of the guide rail. When the guide rail is overturned from the second limit state, the second limit side and the second limit plane together support the guide rail to achieve the overturning. That is, the overturning crank is overturned from the first limit state to the second limit state as a somersault. When the overturning crank is overturned from the second limit state to the first limit state, the guide rail is overturned together.

[0016] As one of the preferred embodiments of the present application, two conveying mechanisms are arranged in the pressing mechanism respectively. The two conveying mechanisms respectively convey the guide rails to the pressing platform in a staggered manner, and the guide rails are straightened in a staggered manner to improve the work efficiency.

[0017] Based on the straightening method of the straightening device for the long guide rail with a complex cross section, the method comprises the following steps.

[0018] Step one, deflection detection

[0019] The guide rail is placed on the detection platform with the straightening face upward. The distance between the first probe and the detection platform is measured by using the length of the first probe. The distance between the second probe and the current straightening face of the guide rail is measured by using the length of the second probe. The deflection distribution of the straightening face is obtained by measuring the difference. The deflection curve of the straightening face of the guide rail is divided into k straightening sections. The coordinates of the maximum deflection position corresponding to each straightening section are obtained. The horizontal coordinate represents the distance of the maximum deflection position in the kth curve from the end point of the guide rail. The vertical coordinate represents the deflection value corresponding to the maximum deflection position. The horizontal coordinate is used as the signal for controlling the displacement of the conveying mechanism, and the vertical coordinate is used as the signal for controlling the pressing of the pressing mechanism.

[0020] Step two, conveying the guide rail by the conveying mechanism

[0021] When the pushing mechanism is powered on, it pushes the guide rail from the detection platform to the conveying mechanism. At this time, the flipping crank of the flipping mechanism flips to the first limit state. The side of the first limit blocks the side of the guide rail. The positioning device detects the position of the guide rail at this time and takes this position as the initial position of the guide rail on the conveying mechanism.

[0022] Step 3: Point-to-point transport of the guide rail

[0023] The conveying mechanism transports the guide rail to the pressure applying mechanism, and sequentially transports the straightening section to the pressure applying platform. The horizontal coordinate corresponding to the maximum deflection position of each straightening section in the deflection curve is used as the judgment signal. When the distance of the guide rail from the initial position detected by the positioning device reaches the judgment signal, the guide rail stops moving. At this time, the maximum deflection position of the current straightening section of the guide rail reaches the pressing position of the pressure applying mechanism.

[0024] Step 4: Alignment of the guide rails

[0025] Each time the conveying mechanism stops, the pressure applying mechanism obtains the value of the ordinate corresponding to the current position of maximum deflection, and then determines the straightening pressure applied by the pressure applying mechanism to the guide rail through the theoretical model of total straightening deflection and straightening pressure. Based on this, the pressure applying mechanism begins to apply pressure to the guide rail.

[0026] Step 5: Repeat steps 3 and 4 until pressure is applied to all straight sections of the current straightening surface of the guide rail.

[0027] Step 6: Flip the guide rail

[0028] After the final straightening section of the guide rail is delivered to the pressure platform, the guide rail disengages from the flipping mechanism and moves entirely to the conveying mechanism on the other side. The flipping crank of the flipping mechanism flips from the first limit state to the second limit state. Then, the conveying mechanism reverses its rotation to allow the guide rail to return along the conveying mechanism. When the positioning mechanism detects that the guide rail has returned to its initial position, the flipping mechanism flips, and the flipping crank flips from the second limit state to the first limit state, simultaneously causing the guide rail to flip and switch to a new straightening surface.

[0029] Step 7: The pushing mechanism pushes the flipped guide rail to the detection platform with the new alignment surface of the guide rail facing upwards. Steps 1 to 5 are repeated to apply pressure to the new alignment surface.

[0030] Step 8: Repeat steps 6 and 7 to complete the pressure application on all straightened surfaces of the guide rail.

[0031] Compared with existing technologies, the advantages of this invention are as follows: This application is applicable to the automatic straightening of long guide rails with complex cross-sections. The main body consists of a conveying mechanism, a deflection detection mechanism, a flipping mechanism, a pushing mechanism, and a positioning mechanism. The overall structure is compact and can realize the automatic straightening of long guide rails. The straightening process separates the deflection detection and pressure application actions, which can effectively improve the straightening accuracy, while reducing manual input and alleviating the labor intensity of workers. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the straightening device in an embodiment of the present invention;

[0033] Figure 2 This is a flowchart illustrating the straightening process of a single-sided guide rail in an embodiment of the present invention.

[0034] Figure 3 This is a flowchart illustrating the straightening process of the left and right guide rails in an embodiment of the present invention.

[0035] Figure 4 This is a left side view of the straightening device in an embodiment of the present invention;

[0036] Figure 5 This is one of the schematic diagrams of the deflection detection mechanism in an embodiment of the present invention;

[0037] Figure 6 This is a second schematic diagram of the deflection detection mechanism in an embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of the positioning mechanism in an embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram of the flipping mechanism in an embodiment of the present invention;

[0040] Figure 9 This is a schematic diagram of the flipping crank in an embodiment of the present invention;

[0041] Figure 10 This is a diagram showing the working state of the flipping mechanism in the left limit position (first limit position) in an embodiment of the present invention;

[0042] Figure 11 This is a diagram showing the crank in its left limit position in an embodiment of the present invention;

[0043] Figure 12 This is a diagram showing the working state of the flipping mechanism in the right limit position (second limit position) in an embodiment of the present invention;

[0044] Figure 13 This is a diagram showing the state of the crank being in the right limit position in an embodiment of the present invention. Detailed Implementation

[0045] The present invention will be further described in detail below with reference to the accompanying drawings. The embodiments described are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The textual descriptions in this embodiment correspond to the accompanying drawings, and the descriptions involving orientation are also based on the descriptions in the accompanying drawings, and should not be construed as limiting the scope of protection of the present invention.

[0046] The embodiment takes a guide rail with four sides as an example to describe the straightening device in detail. The straightness of the guide rail is effectively improved by applying pressure to the four sides (90° to each other) of the guide rail.

[0047] The straightening device for the long guide rail with complex cross section comprises a pressure applying mechanism 1, a conveying mechanism, a deflection detection mechanism, a turnover mechanism, a pushing mechanism and a position detection mechanism symmetrically arranged on the left and right sides of the pressure applying mechanism 1. The conveying mechanism comprises a left conveying mechanism 2 and a right conveying mechanism 13. The deflection detection mechanism comprises a detection platform and a detection instrument, and comprises a left detection platform 3 and a left detection instrument 4, and a right detection platform 12 and a right detection instrument 11. The turnover mechanism comprises two groups, and comprises a left turnover mechanism group 6 and a right turnover mechanism group 8. The pushing mechanism also comprises two groups, and each group comprises four devices moving together, and comprises a left pushing mechanism group 7 and a right pushing mechanism group 9. The position detection mechanism comprises a left position detection mechanism 5 and a right position detection mechanism 10.

[0048] The connection relationship between different mechanisms on the left side is taken as an example: the left conveying mechanism 2 is welded with the bottom support part of the pressure applying mechanism 1, the left conveying mechanism 2 conveys the guide rail through a conveying roller, the left turnover mechanism 6 needs to ensure that the cylinder action track does not interfere with the left conveying mechanism 2, and meets the requirements of left and right limiting of the turnover crank 31. A guide block is arranged on the pressure applying platform of the pressure applying device 1, which is used to realize the centering of the guide rail, so that the guide rail can be located at the pressing position after reaching the pressure applying platform. The left conveying mechanism 2 is welded with the bottom support square steel of the left detection platform 3, the left detection platform 3 is located on one side of the left conveying mechanism 2, and the extension direction is consistent with the guide rail conveying direction of the left conveying mechanism 2. The left pushing mechanism group 7 is welded with the bottom square steel of the left conveying mechanism 2, the left pushing mechanism group 7 is located on the other side of the left conveying mechanism 2, and there are a total of four pushing cylinders, and the front ends of the cylinders are all provided with magnetic blocks for attracting the guide rail during pushing.

[0049] Structure of the mechanism: the mechanisms on the left and right sides of the pressure applying mechanism 1 are consistent, and the mechanism on the left side is taken as an example to be described in detail.

[0050] Main structure of the left detection instrument 4 (left deflection detection mechanism): the stepping motor 14 is connected with the cross shaft 15 to transmit power to the ball screw guide rail 16, so that the sliding block on the ball screw guide rail 16 drives the horizontal plate 19 to move up and down. The horizontal plate connector 18 is fixed to the horizontal plate 19 through the horizontal plate screw 17. The non-resistance pneumatic motion sliding block 20 selects the KUNZ straightness measurement instrument series of Switzerland, the first probe 21 and the second probe 23 are connected with the measurement software XPRO-K4, the hexagonal head bolt 24 can tighten or loosen the probe seat 22, which is used to adjust the height of the probe relative to the guide rail and the left detection platform 3. The probe seat 22 is fixed to the horizontal plate connector 18 through the probe seat screw 25.

[0051] The left detection instrument 4 is suspended on the marble plate of the left detection platform 3 by the non-resistance pneumatic movement of the slider 20, and the marble plate with a flat support surface is used as the detection platform. Due to the limitation of the side of the left detection platform 3, it can only move along the length direction of the detection platform. The first probe 21 of the detection instrument measures the distance of the upper surface of the guide rail, and the second probe 23 measures the distance of the marble plate, and the actual bending deflection of the upper surface (straightening surface) of the guide rail is obtained by the difference between the two. On the marble plate with high flatness, the bending caused by the gravity of the guide rail itself can be effectively avoided, the distance measuring difference can effectively eliminate the influence of the unevenness of the base, and the detection accuracy is improved.

[0052] The main structure of the left positioning mechanism 5: the sensor adjusting frame 27 adjusts the laser distance sensor 26 to a suitable height, and the support square steel 28 is welded on the outside of the left conveying mechanism 2. The laser distance sensor 26 measures the conveying distance of the guide rail on the left conveying mechanism 2, which can be used as a judgment of whether the guide rail is conveyed to the position, so as to ensure that the position of the maximum deflection of each straightening section of the guide rail stops at the lower pressing position of the pressing platform.

[0053] The basic principle of the left overturning device group 6 is a crank slider, the cylinder 29 is an equivalent slider and is a driving part, the connecting rod 30 connects the cylinder 29 and the overturning crank 31, the spacer block 32 ensures the eccentric distance, and the support square steel 34 supports the bottom plate 33 to fix the positions of the cylinder and the spacer block 32. Since the crank slider has a dead point position, it is necessary to limit the rotation of the overturning crank 31 so that it does not reach the dead point. Two pins are arranged, when the pins collide with the bearing seat connecting screw, the overturning crank 31 will stop rotating, realizing the limiting function. The first limiting side surface (X1) of the left limiting position and the second limiting side surface (X3) of the right limiting position must be greater than or equal to the distance between the two guide blocks in the pressing mechanism 1. The first limiting plane (X2) of the left limiting position and the second limiting plane (X4) of the right limiting position must be lower than the outer circle of the roller of the left conveying mechanism 2, which ensures that the guide rail will not be disturbed by the overturning crank 31 when it is displaced on the left conveying mechanism 2, and can be overturned at a specific position.

[0054] The guide rail straightening method based on the above straightening device

[0055] The guide rail a is placed on the left detection platform 3 on the left side, and the four surfaces are a1, a2, a3 and a4. The guide rail b is placed on the right detection platform 12 on the right side, and the four surfaces are b1, b2, b3 and b4.

[0056] Before starting, the deflection detection mechanism is adjusted, and the first probe and the second probe are respectively adjusted to appropriate positions and fixed, so as to facilitate the detection of the guide rail straightening surface and the marble plane.

[0057] The first step is to measure. The left detection instrument 4 detects the axial movement, and the second probe 23 detects the entire length of the guide rail a to obtain the distance between the second probe 23 and the upper surface of the guide rail. The first probe 21 measures the distance from the measuring head to the marble plate, and the deflection distribution of the upper surface of the guide rail is obtained by the difference. The software records and assigns the curve coordinates, and the right detection instrument 11 detects the guide rail b1 in the same way. The deflection curve of the guide rail is divided into k sections, and each section is as long as possible, that is, 200 mm, to obtain the coordinates of the maximum deflection position in each section of the curve. The abscissa represents the distance of the point with the maximum deflection in the kth section of the curve from the end point, and the ordinate represents the maximum deflection value. The abscissa is used as a signal to control the displacement of the conveying mechanism, and the ordinate is used as a signal to control the downward pressure of the pressing mechanism 1

[0058] The second step is to move. After the inspection, the left pushing mechanism group 7 is powered on, the electromagnet at the front end of the cylinder attracts the guide rail and pulls it to the roller way of the left conveying mechanism 2, and stops at the left limit point of the left turning mechanism group 6. At this time, the side of the guide rail is in contact with the first limit side (X1) plane of the turning crank 31, the left pushing mechanism group 7 is powered off, and the left position detection mechanism 5 detects the position of the guide rail at this time. This position is used as the initial position of the guide rail.

[0059] The third step is to advance. The left conveying mechanism 2 conveys the guide rail to the pressing platform of the pressing mechanism 1, and the abscissa of the maximum deflection position measured by the left deflection detection mechanism 4 is used as a judgment signal. When the left position detection mechanism 5 detects that the guide rail is equal to the judgment signal from the initial position, the guide rail stops moving. At this time, the maximum deflection position of the kth section of the guide rail a is exactly stopped at the downward pressure position of the pressing mechanism 1.

[0060] The fourth step is to press. When the left conveying mechanism 2 stops each time, the pressing mechanism 1 obtains the value of the ordinate of the maximum deflection position, and determines the size of the straightening pressure through the existing total straightening deflection and straightening pressure theoretical model. The pressing mechanism 1 starts to press the guide rail.

[0061] The fifth step is to retreat. After the last section of the guide rail completes the pressing, the turning crank 31 of the left turning mechanism group 6 turns from the left limit state to the right limit state, and then the motor of the left conveying mechanism 2 is reversed to make the guide rail return along the original path of the left conveying mechanism 2 and move away from the pressing mechanism 1.

[0062] The sixth step is to turn. When the left position detection mechanism 5 detects that the guide rail returns to the initial position, the left turning mechanism group 6 acts, the turning crank 31 turns from the right limit state to the left limit state, and the turning crank 31 rotates 90°, while driving the guide rail to turn 90°. At this time, the upward face of the guide rail changes from a1 to a2.

[0063] The seventh step is to move. At this time, the left pushing mechanism group 7 is powered on and pushes the guide rail to the left detection platform 3, and the steps one to five are repeated to start the straightening process of the new straightening face a2.

[0064] When the guide rail a completes the fifth step, the guide rail b begins to enter the straightening process of b1.

[0065] The specific straightening process of the left and right guide rails is: a1 surface pressure, b1 surface measurement; b1 surface pressure, a2 surface measurement; a2 surface pressure, b2 surface measurement; b2 surface pressure, a3 surface measurement; a3 surface pressure, b3 surface measurement; b3 surface pressure, a4 surface measurement; a4 surface pressure, b4 surface measurement; b4 surface pressure, guide rail a is replaced, and aa is measured aa1.

[0066] The above embodiment has the following characteristics:

[0067] 1. The embodiment has pressure on the four surfaces of the guide rail, effectively improving the straightness of the guide rail,

[0068] 2. Each surface of the guide rail to be straightened needs to go through the straightening process, which is divided into seven steps: measurement → movement → advance → pressure → retreat → flip → movement.

[0069] 3. The embodiment can simultaneously straighten two guide rails from the left and right sides, but only one guide rail is allowed in the pressure area, and the left and right guide rails are staggered in the pressure mechanism 1 for pressure straightening. At the beginning, the guide rails a and b are placed on the left and right detection platforms respectively, when the guide rail a is in the pressure, the guide rail b is detected on the right detection platform and waits; after the guide rail a leaves the pressure area and returns to the detection area, the guide rail b enters the pressure area.

[0070] 4. The basic principle of the flip mechanism is to use a crank slider, with the slider as the driving part to drive the crank to rotate, so as to realize the 90° flip of the guide rail, thereby automatically switching the straightening surface.

[0071] 5. The flip crank is preferably sawtooth-shaped, which not only ensures the realization of the flip function, but also ensures that the guide rail will not interfere with the flip mechanism when moving left and right.

[0072] 6. The flip crank is preferably provided with a limit to prevent the occurrence of a flip dead point position, causing jamming.

[0073] 7. The flip mechanism is arranged relative to the conveying mechanism and placed under the roller way, which can save space and realize the flip of long guide rails.

[0074] 8. The push mechanism adopts the mode of air cylinder + electromagnet, and the electromagnet is electrified to pull the guide rail, and is not electrified to push the guide rail.

[0075] 9. The deflection detection area and the pressure area of the embodiment are separated, and the guide rail is placed on a marble plate with high flatness during deflection detection, which overcomes the bending caused by gravity and improves the straightening accuracy.

[0076] 10、Deflection detection adopts double probe mode, respectively measures the distance between guide rail and detection platform, and expresses the guide rail deflection distribution by distance difference, which eliminates the error caused by base unevenness.

Claims

1. A straightening device for long guide rails with complex cross-sections, characterized in that: include Pressure application mechanism (1): It has a pressure head that can press down to straighten the maximum deflection position of the guide rail straightening surface on the pressure application platform; Conveying mechanism (2): conveys the guide rail to the pressure platform of the pressure applying mechanism (1); Deflection detection mechanism (4): detects the deflection of the current straightened surface of the guide rail to obtain at least one position of maximum deflection; Positioning mechanism (5): detects the conveying distance of the guide rail on the conveying mechanism (2), and controls the conveying mechanism to convey the guide rail so that the position of maximum deflection is conveyed to the pressure platform in sequence; Flipping mechanism (6): Flipping the guide rail causes multiple planes of the guide rail to be flipped upwards in sequence as straightening surfaces. The flipping mechanism (6) is set relative to the conveying mechanism (2) and is used to flip the guide rail on the conveying mechanism (2) to switch the straightening surfaces. The flipping mechanism (6) includes a connecting rod (30) and a flipping crank (31). The connecting rod (30) is driven to act on the flipping crank (31), causing the flipping crank (31) to flip and switch between a first limit state and a second limit state with the rotating shaft as the center. The guide rail is supported on the flipping crank (31). When switching between the first limit state and the second limit state, the guide rail flips synchronously to achieve the switching of the upward straightening surfaces.

2. The straightening device for long guide rails with complex cross-sections according to claim 1, characterized in that: The pressure platform of the pressure applying mechanism (1) is connected to the conveying mechanism (2), and a pair of guide blocks are set on the pressure applying platform, forming a guide rail inlet between the two guide blocks.

3. The straightening device for long guide rails with complex cross-sections according to claim 1, characterized in that: A detection platform (3) is set on one side of the conveying mechanism (2), and the deflection detection mechanism (4) is set relative to the detection platform (3). The guide rail is placed flat on the detection platform (3), and the deflection detection mechanism (4) detects the deflection of the guide rail straightening surface relative to the detection platform (3).

4. The straightening device for long guide rails with complex cross-sections according to claim 3, characterized in that: The deflection detection mechanism (4) includes a resistance-free pneumatic motion slider (20), a horizontal plate (19), a first probe (21), and a second probe (23). The horizontal plate (19) is mounted on the resistance-free pneumatic motion slider (20) and can move up and down. The first probe (21) and the second probe (23) are both mounted on the horizontal plate (18). The resistance-free pneumatic motion slider (20) is suspended on the detection platform (3) and can slide along the extension direction of the detection platform. When the guide rail is placed flat on the detection platform, the first probe (21) is used to measure the distance between the first probe (21) and the detection platform (3) along the entire length. At the same time, the second probe (23) is used to measure the distance between the second probe (23) and the guide rail straightening surface. Based on this, the deflection of the guide rail straightening surface relative to the detection platform is obtained.

5. The straightening device for long guide rails with complex cross-sections according to claim 4, characterized in that: The deflection detection mechanism (4) includes a stepper motor (14) and a ball screw guide rail (16). The ball screw guide rail (16) is vertically arranged and fixedly connected to the resistance-free pneumatic motion slider (20). The horizontal plate (19) is fixedly connected to the slider on the ball screw guide rail (16). The stepper motor (14) acts on the ball screw guide rail (16) to control the vertical displacement of the horizontal plate (19).

6. The straightening device for long guide rails with complex cross-sections according to claim 3, characterized in that: It also includes a pushing mechanism (7), located on one side of the conveying mechanism (2), for pushing the guide rail between the detection platform (3) and the conveying mechanism (2).

7. The straightening device for long guide rails with complex cross-sections according to claim 1, characterized in that: The positioning mechanism (5) is positioned relative to the conveying mechanism (2), and uses a laser rangefinder as a displacement sensor to measure the initial position of the guide rail on the conveying mechanism (2) and the displacement distance of the guide rail relative to the initial position.

8. The straightening device for long guide rails with complex cross-sections according to claim 1, characterized in that: The flip crank (31) has a first limiting side and a first limiting plane. When the flip crank (31) is in the first limiting state, the first limiting side blocks the outer side of the guide rail, restricting the movement of the guide rail on the conveying mechanism. The flip crank (31) has a second limiting side and a second limiting plane. When the flip crank (31) is in the second limiting state, the second limiting side blocks the outer side of the guide rail. The second limiting side and the second limiting plane together support the guide rail to achieve flipping.

9. A straightening method for a straightening device for a long guide rail with a complex cross-section according to any one of claims 1 to 8, characterized in that: include Step 1: Deflection Detection The guide rail is placed flat on the detection platform (3) with the straightened surface facing upward. The distance between the first probe (21) and the detection platform (3) is measured along the length of the first probe (21). The distance between the second probe (23) and the current straightened surface of the guide rail is measured along the length of the second probe (23). The deflection distribution of the straightened surface is obtained by measuring the difference. The curve coordinates are recorded and assigned. The deflection curve of the guide rail straightened surface is divided into k straightened segments. The coordinates of the maximum deflection position in each straightened segment are obtained. The horizontal axis represents the distance from the end point of the guide rail to the position of the maximum deflection in the kth segment of the curve. The vertical axis represents the deflection value corresponding to the position of the maximum deflection. The horizontal axis is used as the signal to control the displacement of the conveying mechanism (2). The vertical axis is used as the signal to control the downward pressure of the pressure applying mechanism (1). Step 2: Conveying mechanism conveyor rails When the pushing mechanism (7) is powered on, it pushes the guide rail to the conveying mechanism (2). At this time, the flipping crank (31) of the flipping mechanism (6) flips to the first limit state. The side of the first limit blocks the side of the guide rail. The positioning device (5) detects the position of the guide rail at this time and takes this position as the initial position of the guide rail on the conveying mechanism (2). Step 3: Point-to-point transport of the guide rail The conveying mechanism (2) conveys the guide rail to the pressure applying mechanism (1) and sequentially conveys the straightening section to the pressure applying platform. The horizontal coordinate corresponding to the maximum deflection position of each straightening section in the deflection curve is used as the judgment signal. When the distance of the guide rail from the initial position detected by the positioning device (5) reaches the judgment signal, the guide rail stops moving. At this time, the maximum deflection position of the current straightening section of the guide rail just reaches the pressing position of the pressure applying mechanism (1). Step 4: Alignment of the guide rails When the conveying mechanism (2) stops each time, the pressure applying mechanism (1) obtains the value of the longitudinal coordinate corresponding to the current position of maximum deflection, and determines the straightening pressure applied by the pressure applying mechanism (1) to the guide rail through the theoretical model of total straightening deflection and straightening pressure. The pressure applying mechanism (1) then starts to apply pressure to the guide rail accordingly. Step 5: Repeat steps 3 and 4 until pressure is applied to all straight sections of the current straightening surface of the guide rail. Step 6: Flip the guide rail After the final straightening section of the guide rail is delivered to the pressure platform, the guide rail is disengaged from the flipping mechanism (6) and moves to the conveying mechanism on the other side. The flipping crank (31) of the flipping mechanism (6) flips from the first limit state to the second limit state. Then the conveying mechanism (2) reverses to allow the guide rail to return along the conveying mechanism (2). When the positioning mechanism (5) detects that the guide rail has returned to the initial position, the flipping mechanism (6) flips, and the flipping crank (31) flips from the second limit state to the first limit state, while driving the guide rail to flip and switch to a new straightening surface. Step 7: The pushing mechanism (7) pushes the flipped guide rail to the detection platform (3), with the new straightening surface of the guide rail facing upwards. Steps 1 to 5 are repeated to complete the pressure on the new straightening surface. Step 8: Repeat steps 6 and 7 to complete the pressure application on all straightened surfaces of the guide rail.

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