In-place status detection method and detection device and straightening machine based on the method

Abstract

The present invention relates to an in-place status detection method and a detection device and a straightening machine based on the method, and belongs to the field of detection. This scheme utilizes the difference in the length of the rocker rods on both sides of the rocker shaft to amplify the smaller displacement of the end of the tested mechanism into a larger displacement, and then detects the amplified displacement through a proximity switch, thereby eliminating the inaccurate detection caused by the small displacement change and direct detection through the detection switch in the original detection method, overcoming the shortcomings of the previous detection method, and the signal transmission is accurate and reliable. It is flexible in application and has a wide range of applications, and can be widely used in the detection of similar equipment. When it is used in a straightening machine, it can not only realize the different height switching of the roller box working position and the roller changing position through the structure, but also realize the detection of the in-place status of the roller box during the replacement process, and transmit the position signal to the control system to complete the automatic control operation of the system.

Description

Technical Field

[0001] The invention belongs to the field of detection, and in particular relates to an in-place state detection method and a detection device and a straightening machine based on the method. Background Art

[0002] During the use of mechanical equipment, parts and components will be repaired and replaced. The reinstalled parts need to be inspected to see if they are in place and their accuracy. There are many detection methods in the prior art, from conventional mechanical inspection tools to detection using photoelectric technology. There are endless methods and the detection accuracy varies greatly. However, for the more hidden parts to be inspected in large equipment, the current detection methods are relatively complicated. The main reasons are: (1) The parts to be inspected are hidden and not easy to see from the outside, making them difficult to measure intuitively; (2) The size to be inspected is usually small, and the specifications or detection range of conventional inspection tools do not match the size to be inspected, resulting in large detection errors; (3) The equipment itself is large in size and heavy in weight. In order to obtain more accurate detection results, it is necessary to use some equipment to perform indirect measurement of the parts to be inspected. This method is complicated to operate and has high cost.

[0003] Take the roller change of the straightening machine as an example: the roller box with rollers is installed in the frame (also called "archway"), and there is a height difference h between the working position elevation of the lower roller box and the roller change position elevation. When the straightening machine performs roller change operation, the height difference h provides space for the wheels of the lower roller box to run on the track of the frame when changing rollers. Therefore, when the old roller box leaves the working position, it is necessary to raise the height h so that the working surface of the lower roller box is disengaged from the supporting surface of the frame track below, and the wheels run on the track, thereby completing the operation of dragging the old roller box out of the straightening machine frame; when the new roller box is pushed into the straightening machine frame and reaches the working position, the lower roller box will drop another height h, and the working surface of the lower roller box will fit with the supporting surface of the frame track below, and return to the working state. Here, the position signals of the lower roller box leaving the working position and returning to the working position are both important input signals for the operation control of the straightening machine, and the transmission is required to be accurate and reliable.

[0004] The existing detection method is generally to detect the descending height h of the lower roller box of the straightening machine through a proximity switch. The descending height value is generally small, usually ranging from 10mm to 20mm, and the proximity switch is not sensitive to the change of the detection size in a small range, and the error is large. Of course, the displacement sensor can also be used to directly detect the descending displacement of the roller box, or a laser rangefinder can be used to detect the distance difference between the working surface of the lower roller box and the rangefinder and the photovoltaic emission surface to calculate the accurate height of the roller box. This type of method can accurately measure the height value of the roller box descent, and feed back the measured data value to the control system.

[0005] However, for the actual use of such equipment, operators do not need accurate height values, but rather status information of "whether it is in place"; therefore, accurate detection methods are unnecessary. Such methods will make the control system more complicated, thereby increasing the detection cost. Summary of the invention

[0006] In view of this, an object of the present invention is to provide an in-place status detection method which is simple in structure, easy to implement and maintain, and a detection device and a straightening machine based on the method, so as to reduce the detection cost investment of such equipment.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A height detection device comprises a swing arm, a spring reset mechanism and a proximity switch; the swing arm is an L-shaped structure consisting of a short swing arm and a long swing arm, which is rotatably connected to a support via a swing shaft installed at an inflection point, one end of the spring reset mechanism is connected to the lower part of the short swing arm or the lower part of the long swing arm, and the other end is correspondingly connected to the support below, and the proximity switch is correspondingly arranged on the side of the long swing arm.

[0009] Furthermore, the spring return mechanism is a tension spring, the upper end of which is hooked on the lower part of the long swing rod, and the lower end is correspondingly hooked on the support.

[0010] Furthermore, the spring return mechanism is a compression spring, the upper end of which is inserted into the spring hole at the lower part of the short swing arm, and the lower end of which is correspondingly inserted into the spring hole of the support.

[0011] Furthermore, the detection contact surface at the top of the short swing rod is an arc surface.

[0012] Furthermore, a limit block is provided on the support corresponding to the long swing rod.

[0013] An in-place state detection device suitable for a straightening machine comprises the height detection device as described above, and also comprises a height adjustment mechanism;

[0014] The height adjustment mechanism is mainly composed of in-position grooves opened on the frame rails so that the lower roller box is in the corresponding working position. Each in-position groove is an arc groove and matches the front wheel group and the rear wheel group arranged at the bottom of the lower roller box. The bottom of each in-position groove has a smooth arc transition with the rail plane.

[0015] The support in the height detection device can be detachably installed on the frame, and the detection contact surface of the short swing arm is located at the bottom of the lower roller box; when the front and rear wheel groups are located in the positioning grooves, the working surface of the bottom of the lower roller box is in contact with the supporting surface of the frame track and presses down the detection contact surface of the short swing arm accordingly.

[0016] Furthermore, the positioning groove matching the front wheel group is the front positioning groove, and the positioning groove matching the rear wheel group is the rear positioning groove. The center lines of the two front positioning grooves are parallel to the center lines of the two rear positioning grooves, and the two rear positioning grooves are located beside the two front positioning grooves.

[0017] Furthermore, the positioning groove matching the front wheel set is the front positioning groove, and the positioning groove matching the rear wheel set is the rear positioning groove. The center lines of the two front positioning grooves are collinear with the center lines of the two rear positioning grooves.

[0018] Furthermore, brackets are arranged on the sides of the two front positioning grooves, and an upper slide plate matched with the brackets is correspondingly arranged on the lower roller box.

[0019] Furthermore, the bracket is covered with a lower slide plate.

[0020] Furthermore, the lower slide plate and the upper slide plate are smooth stainless steel plates and / or copper plates.

[0021] A straightening machine comprises the aforementioned in-place state detection device, which is mainly composed of a height detection device and a height adjustment mechanism.

[0022] A straightening machine includes the aforementioned in-place status detection device, which is mainly composed of a height detection device and a height adjustment mechanism, wherein the height adjustment mechanism has two optimized structural forms to meet the smooth movement requirements of the lower roller box.

[0023] A method for detecting an in-place status mainly comprises the following steps:

[0024] S1: A height detection device as described above is installed outside the rack and below the workpiece to be tested, the detection contact surface of the short swing rod is located at the bottom of the workpiece to be tested, and the detection end of the long swing rod and the proximity switch are located outside the rack away from the workpiece to be tested;

[0025] S2: In the initial state, the long swing arm falls on the limit block, and the top of the short swing arm is higher than the rack rail support surface by a distance h set. The long swing arm corresponds to the maintenance replacement position proximity switch in the proximity switch, and the maintenance replacement position proximity switch sends the "maintenance replacement position" position information to the control system;

[0026] S3: The test piece is pushed into the rack and moves along the rack track, and the working surface at the bottom of the test piece contacts the top of the short swing rod;

[0027] S4: After the workpiece to be tested is lowered into place in the rack, the working surface at the bottom of the workpiece to be tested will press the top of the short pendulum rod, causing the short pendulum rod to deflect into place. The detection end of the long pendulum rod that deflects with the rotation of the pendulum shaft corresponds to the working position proximity switch in the proximity switch. The working position proximity switch 13 sends the "working position" position information to the control system.

[0028] A method for detecting the in-position state of a roller box of a straightening machine includes steps S1 to S4 as described above, and also includes step S0: a positioning groove matching the wheel group at the bottom of the lower roller box is opened on the frame track, and the positioning groove makes the lower roller box correspondingly in the working position; the workpiece to be tested described in step S4 is lowered into position in the frame, that is, the wheel group is located in the positioning groove, and at this time, the working surface of the bottom of the lower roller box should be in contact with the supporting surface of the frame track.

[0029] Further, the method includes step S01: setting two supporting brackets on the frame rail, and adding two upper slide plates matching with the brackets at the bottom of the lower roller box, so that when the wheel group at the bottom of the lower roller box passes through the positioning groove of the front wheel, the lower roller box can slide stably with support.

[0030] The beneficial effects of the present invention are:

[0031] (1) The height detection device has a wide range of applications. As long as the object to be tested can contact and cooperate with the short pendulum rod in the process of displacement change, the small and difficult-to-measure displacement at the end of the tested mechanism can be amplified into a larger displacement by the long pendulum rod and measured. The device has a simple structure, low cost, and is easy to arrange the detection switch, which can greatly improve the reliability of detection. It eliminates the inaccurate detection caused by the small displacement change and direct detection through the detection switch in the original detection method, overcomes the shortcomings of the previous detection method, and sends accurate and reliable signals.

[0032] (2) The height adjustment mechanism has two structural forms, one of which is simple in structure and has no additional structure, and the other can be directly improved on existing equipment. With this adjustment mechanism, the roller box changing operation can be carried out smoothly without tilting or vibrating the roller box. The roller box can be directly dragged out or pushed in from the frame through the roller changing mechanism without the need for lifting with the help of hydraulic mechanisms, etc., which is easy to operate.

[0033] (3) When it is suitable for equipment such as straightening machines and shearing machines that require frequent replacement of shear blades or rollers, it can not only realize the different height switching of the working position of the part to be replaced and the maintenance and replacement position through the structure, but also realize the detection of the in-place status of the part to be replaced during the replacement process, and transmit the position signal to the control system to complete the automatic control operation of the system.

[0034] (4) It is flexible in application and can be widely used in the detection of similar equipment.

[0035] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0037] Figure 1 It is a structural schematic diagram of a height detection device;

[0038] Figure 2 for Figure 1 A-direction view;

[0039] Figure 3 for Figure 1 Amplified schematic diagram of

[0040] Figure 4 It is a schematic diagram of the height detection device installed on the straightening machine;

[0041] Figure 5 A schematic diagram of one structure of the height adjustment mechanism;

[0042] Figure 6 for Figure 5 B-direction view;

[0043] Figure 7 It is a second schematic diagram of the structure of the height adjustment mechanism;

[0044] Figure 8 for Figure 7 Schematic diagram of the layout status of the in-place grooves.

[0045] Reference numerals:

[0046] Height detection device 1, lower roller box 2, frame rail 3, roller changing device rail 4, frame 5;

[0047] In the height detection device 1: a short swing rod 11, a tension spring 12, a working position proximity switch 13, a support 14, a swing shaft 15, a limit block 16, a maintenance and replacement position proximity switch 17, a long swing rod 18, and a bracket 1401;

[0048] In the lower roller box 2: a rear wheel set 21, a front wheel set 22, and an upper slide plate 23;

[0049] The rack rail 3 includes: a rear positioning groove 31 , a front positioning groove 32 , and a bracket 33 . DETAILED DESCRIPTION

[0050] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0051] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0052] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0053] This embodiment describes a height detection device

[0054] See also Figure 1 to Figure 3 The height detection device 1 includes a swing rod, a spring reset mechanism and a proximity switch; the swing rod is an L-shaped structure composed of a short swing rod 11 and a long swing rod 18, a swing shaft 15 is installed at its inflection point, and the swing shaft 15 is rotatably connected to the support 14 through a bearing 19. One end of the spring reset mechanism is connected to the lower part of the short swing rod 11 or the lower part of the long swing rod 18, and the other end is correspondingly connected to the support 14 below. The proximity switch is correspondingly arranged on the side of the long swing rod 18.

[0055] Specifically, in the height detection device 1, the support 14 is used as the installation base, the short swing rod 11, the long swing rod 18 and the swing shaft 15 are an integrally welded structure, the swing shaft 15 is located at the inflection point of the swing rod, and the swing shaft 15 is used as the rotation center and is installed in the shaft hole of the support 14 through two bearings 19, and the bearings 19 are axially fixed by the shaft end retaining ring. According to the use requirements, two proximity switches can be set and installed on the bracket 1401 of the support 14. The two proximity switches can be arranged on one side of the long swing rod 18 by staggered arrangement on one bracket 1401, or arranged on both sides of the long swing rod 18 through one bracket 1401 respectively.

[0056] Since the short pendulum rod 11 and the long pendulum rod 18 on both sides of the pendulum shaft 15 are of different lengths, a small height change on the short pendulum rod 11 side can be amplified into a larger height change on the long pendulum rod 18 side. Therefore, the short pendulum rod 11 is used as a detection end to cooperate with the object to be tested, and the long pendulum rod 18 is used as a sensing end to cooperate with the proximity switch. The device is installed at the part to be tested so that the object to be tested contacts the short pendulum rod 11. When the height position of the object to be tested changes, its change is correspondingly amplified at the end of the long pendulum rod 18, and the proximity switch can detect the corresponding position change electrical signal and feed the signal back to the corresponding control system in a timely manner.

[0057] As a further optimization of the above solution, the detection contact surface at the top of the short swing rod 11 is an arc surface. Figure 3 The contact portion between the short swing rod 11 and the workpiece to be tested is in an arc shape, so that the workpiece to be tested can be smoothly cut into the short swing rod 11 during the matching process without any obstruction.

[0058] The device is used in a straightening machine to detect the descending height of the lower roller box 2, such as Figure 4 As shown. At this time, the support 14 is installed on the window side of the frame 5 (also called the "archway") by bolts. One end of the short swing rod 11 contacts the working surface of the lower roller box 2 to be tested. The detection contact surface on the top of the short swing rod 11 is an arc surface, and the lower roller box 2 can be smoothly cut in during the pushing process. The long swing rod 18 serves as a (swing type) sensing rod. The working position proximity switch 13 and the maintenance and replacement position proximity switch 17 are installed on the bracket 1401. The long swing rod 18 can realize the detection of two working positions. As the lower roller box 2 descends, the contact point between the short swing rod 11 and the working surface (i.e., the "lower bottom surface") of the lower roller box 2 is constantly changing until the lower roller box 2 completes the descent to the set height h.

[0059] like Figure 3As shown, the height of the arc center point R of the short swing rod 11 is also h, and the angles of the long and short swing rods on both sides of the swing shaft 15 are γ. The center point of the swing shaft 15 is O, the position points of the working position proximity switch 13 and the maintenance and replacement position proximity switch 17 are M and N respectively, the angles of the short swing rod 11 with the horizontal line before and after the swing are α2 and α1 respectively, and the angles of the long swing rod 18 with the horizontal line before and after the swing are β1 and β2 respectively, OR=L1, OP=L2; then it should be:

[0060] h=OR(sinα2-sinα1)=L1(sinα2-sinα1);

[0061] h′=OMsinβ2-ONsinβ1=L2(tanβ2-tanβ1).

[0062] During design, the enlarged swing height h′ can be calculated based on parameters such as the h value and the length of the pendulum rod.

[0063] For example: L1=81.7mm, α1=17°, α2=32.5°, L2=225mm, β1=6°, β2=21.5°, calculated h=20mm, h′=65mm, the magnification is 3.25 times.

[0064] In this embodiment, the spring reset mechanism is a tension spring 12, the upper end of which is hooked on the lower part of the long swing rod 18, and the lower end is correspondingly hooked on the support 14. The tension spring 12 is used to restore the swing rod to its initial position during the roller replacement operation. The spring is installed by hooking to facilitate the replacement of the spring. Of course, the spring reset mechanism can also be a compression spring. When a compression spring is selected, its upper end is inserted into the spring hole at the lower part of the short swing rod 11, and the lower end is correspondingly inserted into the spring hole of the support 14.

[0065] In this embodiment, a stopper 16 is provided on the support 14 corresponding to the long swing rod 18. The stopper 16 can be welded on the support 14, and when the spring reset mechanism acts on the swing rod to reset it, the stopper 16 is used for positioning the long swing rod 18 when it is reset.

[0066] Regarding the detection device, it should be noted that: the device has a wide range of applications, and its application in a straightening machine is only one of the ways. However, as long as the test piece can contact and cooperate with the short rocker 11 in the process of producing "displacement" changes, the smaller and difficult-to-measure displacement at the end of the tested mechanism can be amplified by the long rocker to a larger displacement and measured. Such as shearing machines, clamping, squeezing and other equipment that require frequent replacement of shear blades or rollers. This type of equipment is generally equipped with a replacement track, and the rollers of the replacement device also cooperate with the frame track to operate. After being in place, it needs to be lowered to a certain height and needs to be positioned for detection. The height detection device 1 can be used in all of them. In addition, height is only one of the many displacement change conditions, and also includes displacement changes in the lateral direction. The device has a simple structure, low cost, and is easy to arrange detection switches, which can greatly improve the reliability of detection.

[0067] This embodiment describes a device for detecting the in-place status of a straightening machine.

[0068] See also Figures 4 to 8 The in-place state detection device is particularly suitable for a straightening machine to detect the in-place state of the roller box during the roller changing process. When used for detecting the in-place state of the roller box, the detection device includes not only the height detection device 1 as described above, but also a height adjustment mechanism for pulling out, resetting and positioning the lower roller box 2, which is specially proposed for the straightening machine.

[0069] In the in-place status detection device, the height adjustment mechanism is improved on the existing equipment, and is mainly composed of an in-place groove opened on the frame rail 3 so that the lower roller box 2 is in the working position. Each in-place groove is an arc groove and matches the front wheel group 22 and the rear wheel group 21 arranged at the bottom of the lower roller box 2. In the radial direction of the in-place groove, the bottom of each in-place groove and the track plane have a smooth arc transition.

[0070] Specifically, the frame rail 3 is installed in the window of the frame 5. During the roll changing operation, the lower roll box 2 needs to be pulled out or pushed into the window of the frame 5. The function of the frame rail 3 is to serve as the track for the wheels of the lower roll box 2 to run. A positioning groove is provided on the frame rail 3. There is a height difference h between the bottom end of the positioning groove (i.e., the "bottom of the groove") and the upper surface of the track (i.e., the "supporting surface"), so that the lower roll box 2 can complete the switching of the working position and the roll changing position height. When the wheel group at the bottom of the lower roll box 2 is located on the upper surface of the frame rail 3 (i.e., out of the positioning groove), the lower roll box 2 is at the height of the roll changing position; when the front wheel group 22 and the rear wheel group 21 at the bottom of the lower roll box 2 are both located in the positioning groove, the lower roll box 2 is in the working position, and the working surface at the bottom of the lower roll box 2 fits the supporting surface of the frame rail 3.

[0071] The height detection device 1 is detachably mounted on one side of the window of the frame 5 through the support 14, and is used to complete the detection of the height status of the lower roller box 2. Specifically, it reflects whether the lower roller box 2 is in the working position or the roller changing position through the change in the downward pressure of the short rocker rod 11 by the lower roller box 2, and transmits the position signal to the control system to complete the automatic control operation of the straightening machine.

[0072] During the roll changing operation, the speed change process is generally: starting at low speed - accelerating - reaching the rated roll changing speed and running stably - decelerating - stopping. Therefore, when the old roll box is dragged out of the frame and the new roll box is pushed into the frame, the rear wheel set 21 at the bottom of the lower roll box must pass through the positioning groove that matches the front wheel set 22 at a faster rated roll changing speed. In order to ensure that the rear wheel set 21 does not sink into the positioning groove when passing through the positioning groove position of the front wheel set 22, causing the roll box to tilt and vibrate, a corresponding optimized structure needs to be designed so that the height of the rear wheel set 21 does not change when passing through the positioning groove position.

[0073] In order to realize the different height switching of the roller box working position and the roller changing position, this solution provides two structural forms to realize the height change of the two positions.

[0074] The height adjustment mechanism in this embodiment adopts the following structural form:

[0075] The in-place groove matching the front wheel set 22 is recorded as the front in-place groove 32, and the in-place groove matching the rear wheel set 21 is recorded as the rear in-place groove 31. In the length direction of the rack rail, the center lines of the two front in-place grooves 32 are parallel to the center lines of the two rear in-place grooves, and in the width direction of the rack rail, the two rear in-place grooves are located beside the two front in-place grooves. In other words, the front in-place groove 32 and the rear in-place groove 31 on the same side of the rack rail 3 are not collinear, and correspondingly, in the straightening machine, the running track line of the front wheel set 22 is also not collinear with the running track line of the rear wheel set.

[0076] For details, please refer to Figure 7 , Figure 8 The rear in-position groove 31 and the front in-position groove 32 are located on different track lines in the wheel running direction, and are staggered. The staggered arrangement can be that the two rear in-position grooves 31 are arranged on both sides of the two front in-position grooves 32 (such as Figure 8 The two rear in-position grooves 31 may be located on the left or right side of the two front in-position grooves 32 (not shown in the figure). In this way, the rear wheel set 21 will not enter the front in-position grooves 32 during driving, which can ensure that the roller box roller changing operation is smooth and smooth. The advantage of this method is that the structure is simple and there is no additional structure. However, because the front and rear wheel sets are on different center lines, the width of the frame track 3 and the roller changing device track 4 needs to be widened.

[0077] The height adjustment mechanism can also adopt another structural form:

[0078] Specifically, the in-position groove matching the front wheel set 22 is recorded as the front in-position groove 32, and the in-position groove matching the rear wheel set 21 is recorded as the rear in-position groove 31. In the length direction of the frame rail, the center lines of the two front in-position grooves 32 and the center lines of the two rear in-position grooves 31 are collinear; correspondingly, the front wheel and the rear wheel on the same side of the lower roller box 2 are collinearly arranged. That is to say, the rear wheel set 21 will pass through the front in-position groove 32 during the running process.

[0079] The rear in-position groove 31 and the front in-position groove 32 are located on the same track line in the direction of wheel movement. If there is no other auxiliary structure, the rear wheel set 21 will enter the front in-position groove 32 when it reaches the front in-position groove 32, and then the rear wheel will drop by a height h, thereby causing the roller box to tilt, which is disadvantageous for the roller box running at the roller changing speed. In order to prevent the rear wheel set 21 from falling into the front in-position groove 32 when passing through the front in-position groove 32, causing the roller box to tilt and vibrate, the optimal design is to set brackets 33 on the sides of the two front in-position grooves 32, and to set an upper slide plate 23 on the lower roller box 2 that matches the bracket 33 to achieve support at the corresponding position.

[0080] See also Figure 5 , Figure 6 Two upper slide plates 23 are arranged at the bottom of the lower roller box 2, and two brackets 33 for support are correspondingly arranged beside the front in-position groove 32 of the frame rail 3. During the process of pulling out the roller box, the front wheel group 22 that has been separated from the front in-position groove 32 runs on the roller changing device track 4 (the roller changing device track 4 is connected to the supporting surface of the frame rail 3 and is in height flush). When the rear wheel group 21 running along the running track of the front wheel group 22 reaches the front in-position groove 32, the bracket 33 beside the front in-position groove 32 supports the upper slide plate 23. At this time, the upper slide plate 23 slides on the bracket 33. Under the support of the bracket 33, the rear wheel group 21 is in a suspended state, that is, the roller box can be supported and slid with the help of the bracket 33, so that the roller box can pass through the front in-position groove 32 smoothly. On the contrary, when the roller box is pushed into the frame, the rear wheel group 21 first moves to the front positioning groove 32. At this time, the front wheel group 22 is still running on the roller changing device track 4, and the roller box is supported and slid by the bracket 33, so that the roller box can smoothly pass through the front positioning groove 32. Finally, the rear wheel group 21 and the front wheel group 22 descend simultaneously into the corresponding positioning grooves.

[0081] As a further optimization of the above solution, a lower slide plate is covered on the bracket 33. The lower slide plate and the upper slide plate can be made of smooth stainless steel plates and / or copper plates to reduce friction.

[0082] The in-place status detection device has a simple structure, realizes the detection function of the height of the straightening machine roller box, and has accurate signal transmission and high reliability. It has the advantages of easy installation and maintenance with little modification to the existing equipment. It changes the method of "directly installing proximity switches in the height direction for detection" adopted in the prior art, and overcomes the shortcomings of the previous detection method. It can be widely used in the detection of similar equipment, such as shearing machines, pinching and squeezing equipment in auxiliary equipment of cold rolling production lines.

[0083] This embodiment describes a straightening machine with a height detection device

[0084] The straightening machine is based on a conventional straightening machine, and is additionally provided with the height detection device 1 as mentioned above.

[0085] Specifically, the support 14 in the height detection device 1 is installed on the window side of the frame 5 by bolts. One end of the short swing rod 11 contacts the working surface of the lower roller box 2 to be tested, and the long swing rod 18 and the bracket 1401 are located on the side away from the window of the frame 5. The working position proximity switch 13 and the maintenance and replacement position proximity switch 17 are installed on the bracket 1401, and the long swing rod 18 can realize the detection of two working positions (i.e., "working position" and "roller replacement position").

[0086] The size specification of the height detection device is designed according to the use requirements, so that the initial position of the long swing rod 18 falls exactly on the limit block 16, and at this time, the height of the detection contact surface of the short swing rod 11 above the track support surface is exactly the set distance h.

[0087] When the long swing rod 18 falls on the limit block 16, the maintenance replacement position proximity switch 17 detects an electrical signal and feeds back to the control system. At this time, it is in the roll change state and there is no roll box in the frame. The roll box is pushed into the frame, and the lower roll box 2 will press down the short swing rod 11 when it descends. The downward pressure change of the short swing rod 11 will be amplified by the long swing rod 18 and measured by the working position proximity switch 13. The working position proximity switch 13 detects an electrical signal and feeds back to the control system. At this time, it is in the working position state. That is, the straightening machine with a height detection device can accurately reflect whether the lower roll box 2 is in the working position or the roll change position, and transmit the position signal to the control system to complete the automatic control operation of the straightening machine.

[0088] This embodiment describes a straightening machine with an in-place status detection device

[0089] The straightening machine is based on a conventional straightening machine, and is equipped with the height detection device 1 as mentioned above. In addition, the structure of the straightening machine itself is improved by setting a height adjustment mechanism, so as to facilitate the pulling out, resetting and positioning of the roller box in the straightening machine.

[0090] Specifically, the added height detection device 1 is installed on the window side of the straightening machine frame 5 through the support 14, one end of the short swing rod 11 contacts the working surface of the lower roller box 2 to be measured, and the long swing rod 18 and the support 1401 are located on the side away from the window of the frame 5. The height adjustment mechanism is improved on the straightening machine, and is mainly composed of a positioning groove opened on the frame rail 3 so that the lower roller box 2 is in the corresponding working position. Each positioning groove is an arc groove and matches the front wheel group 22 and the rear wheel group 21 arranged at the bottom of the lower roller box 2.

[0091] The height adjustment mechanism has two optimized structural forms: one is to stagger the front and rear wheel groups and the front and rear positioning grooves matched therewith, so that the walking route of the rear wheel group avoids the front positioning groove; the other is to add a supporting structure, and use the bracket 33 to realize the supporting sliding of the roller box, so that the roller box can smoothly pass through the front positioning groove 32. To meet the smooth movement requirements of the lower roller box, the two structural forms are as described above and will not be repeated here.

[0092] The straightening machine of this scheme can realize accurate detection of small size changes in height direction through the cooperation of height detection device 1 and height adjustment mechanism, and can also realize different height switching of roller box working position and roller changing position through structure.

[0093] This embodiment describes a method for detecting an in-place status

[0094] A method for detecting the in-place status, which amplifies the displacement of small size through the height detection device as described above, and when the displacement of the tested piece changes, the proximity switch can timely feedback the corresponding position change result. For large equipment, the change in the height of descent is small in size and relatively hidden and difficult to measure. Taking the descent height as an example, the detection process of this method mainly includes the following steps:

[0095] S1: A height detection device 1 as described above is installed outside the frame 5 and below the workpiece to be tested. The detection contact surface of the short swing rod 11 is located at the bottom of the workpiece to be tested, and the detection end of the long swing rod 18 and the proximity switch are located outside the frame 5.

[0096] S2: In the initial state, the long swing arm 18 falls on the limit block 16, and the top of the short swing arm 11 is higher than the distance h set by the support surface of the rack rail 3. The long swing arm 18 corresponds to the maintenance replacement position proximity switch 17 (in the proximity switch), and the maintenance replacement position proximity switch 17 sends the "maintenance replacement position" position information to the control system.

[0097] S3: The test piece is pushed into the rack 5 and moves along the rack track 3 , and the working surface at the bottom of the test piece contacts the top of the short swing rod 11 .

[0098] S4: After the workpiece to be tested is lowered into position in the rack 5, the working surface at the bottom of the workpiece to be tested will press the top of the short swing rod 11, causing the short swing rod 11 to deflect into position. The detection end of the long swing rod 18 that deflects with the rotation of the swing shaft corresponds to the working position proximity switch 13 (in the proximity switch), and the working position proximity switch 13 sends the "working position" position information to the control system.

[0099] This method is applied in a straightening machine to detect the descending height of the roller box.

[0100] Specifically, the height detection device 1 is installed on the window side of the straightening machine frame, and the detection contact surface of the short swing rod 11 corresponds to the bottom surface of the lower roller box 2. The initial state corresponding to the swing rod here is the state that the roller box is not in place during the roller replacement process of the straightening machine, that is, the lower roller box is in the state of being lifted to a height of h, and then the position of the long swing rod 18 at this time is detected by the maintenance replacement position proximity switch 17 on the bracket 1401. The in-place state is the state that the roller box is lowered to the position after the straightening machine changes the rollers. At this time, the working surface of the lower roller box is in contact with the supporting surface of the frame rail 3, and the lowered working surface of the lower roller box will press down the detection contact surface of the short swing rod 11. Correspondingly, the position of the long swing rod 18 is detected by the working position proximity switch 13 on the bracket 1401.

[0101] Of course, the above steps are not limited to downward pressure detection, and the displacement and lifting amount detection can also be carried out. When applied, the height detection device can be installed in reverse.

[0102] This embodiment describes a method for detecting the in-place status of a straightening machine roller box.

[0103] A method for detecting the in-place status of a roller box of a straightening machine, the method uses the height detection device 1 and a specially set height adjustment mechanism as described above to amplify and detect the in-place status of the roller box in the straightening machine, and timely feeds back the corresponding position change results through the maintenance replacement position proximity switch 17 and the working position proximity switch 13. The roller replacement operation and in-place status detection of the straightening machine are realized in the following steps:

[0104] Step S0: A front positioning groove 32 and a rear positioning groove 31 are formed on the frame rail 3 of the straightening machine to match the wheel set at the bottom of the lower roller box. The front and rear positioning grooves enable the lower roller box 2 to be in the working position accordingly.

[0105] Step S01: two brackets 33 for supporting are arranged on the frame rail 3 and beside the front positioning groove 32, and two upper slide plates 23 cooperating with the brackets 33 are added to the bottom of the lower roller box 2, so that when the rear wheel group 21 at the bottom of the lower roller box 2 passes through the front positioning groove 32, the brackets 33 can realize the supporting sliding of the roller box without tilting and vibration.

[0106] S1: A height detection device 1 is installed outside the frame 5 and below the workpiece to be tested. The detection contact surface of the short swing rod 11 is located at the bottom of the workpiece to be tested, and the detection end of the long swing rod 18 and the proximity switch are located outside the frame 5.

[0107] S2: When the old roller box reaches the wear amount or needs to be replaced for other reasons, the roller box is pulled out of the window of the frame 5 by the roller changing device. When the roller box is pulled out and in the roller changing state, the front wheel group 22 and the rear wheel group 21 at the bottom of the lower roller box 2 in the roller box leave the front in-position groove 32 and the rear in-position groove 31. The roller box is in the roller changing position as the initial state, at this time, there is a height difference of h between the working surface of the bottom of the lower roller box and the supporting surface of the frame rail.

[0108] In the initial state, the long rocker arm 18 falls on the limit block 16 under the action of the spring return mechanism (tension spring 12 or compression spring), and the top of the short rocker arm 11 is higher than the distance h set on the supporting surface of the frame rail 3. The long rocker arm 18 corresponds to the maintenance and replacement position proximity switch 17. The maintenance and replacement position proximity switch 17 senses the signal and is in the sending state, sending the "maintenance and replacement position" position (for the straightening machine, it is the "roller change position") information to the control system.

[0109] S3: When the old roller box is lifted away, the new roller box is lifted and pushed into the frame 5 and moves along the frame track 3, the working surface at the bottom of the test piece will contact the top of the short swing rod 11.

[0110] S4: The rear wheel set 21 and the front wheel set 22 at the bottom of the lower roller box 2 reach and enter the rear in-position groove 31 and the front in-position groove 32 again, and the height of the new roller box drops. At this time, the wheel set is located in the in-position groove, and the working surface at the bottom of the lower roller box 2 fits with the supporting surface of the frame rail 3.

[0111] After the workpiece to be tested is lowered into position in the rack 5, the working surface at the bottom of the workpiece to be tested will press the top of the short swing rod 11, causing the short swing rod 11 to deflect into position, and the detection end of the long swing rod 18 deflected with the rotation of the swing shaft corresponds to the working position proximity switch 13, and the working position proximity switch 13 sends the "working position" position information to the control system. At this point, a roll changing cycle is completed.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A device for detecting the in-place status of a straightening machine, characterized in that: The height detection device (1) comprises a swing rod, a spring reset mechanism, a maintenance and replacement position proximity switch (17) and a working position proximity switch (13); the swing rod is an L-shaped structure composed of a short swing rod (11) and a long swing rod (18), which is rotatably connected to a support (14) via a swing shaft (15) installed at an inflection point; one end of the spring reset mechanism is connected to the lower part of the short swing rod (11) or the lower part of the long swing rod (18), and the other end is correspondingly connected to the support (14) below; the maintenance and replacement position proximity switch (17) and the working position proximity switch (13) are correspondingly arranged on the side of the long swing rod (18) in a staggered manner; and a limit block (16) is provided on the support (14) corresponding to the long swing rod (18); Also included is a height adjustment mechanism; The height adjustment mechanism comprises a positioning groove formed on the frame rail (3) so that the lower roller box (2) is in a corresponding working position, each positioning groove is a circular arc groove and matches the front wheel group (22) and the rear wheel group (21) arranged at the bottom of the lower roller box (2), and the bottom of each positioning groove and the rail plane have a smooth circular arc transition; The in-place groove matching the front wheel set (22) is marked as the front in-place groove (32), and the in-place groove matching the rear wheel set (21) is marked as the rear in-place groove (31); The center lines of the two front in-position grooves (32) are parallel to the center lines of the two rear in-position grooves (31), and the two rear in-position grooves (31) are located beside the two front in-position grooves (32); or, the center lines of the two front in-position grooves (32) and the center lines of the two rear in-position grooves (31) are collinear. When the two front in-position grooves (32) are collinearly arranged, brackets (33) are provided beside the two front in-position grooves (32), and an upper slide plate (23) matching the bracket (33) is correspondingly provided on the lower roller box (2); The support (14) in the height detection device is detachably mounted on the frame (5), and the detection contact surface of the short swing rod (11) is located at the bottom of the lower roller box (2); when the front and rear wheel groups are located in the positioning grooves, the working surface of the bottom of the lower roller box is in contact with the supporting surface of the frame rail (3) and the detection contact surface of the short swing rod (11) is pressed down accordingly.

2. The in-place status detection device according to claim 1, characterized in that: The spring return mechanism is a tension spring (12) or a compression spring; when it is a tension spring (12), its upper end is hooked on the lower part of the long swing rod (18), and its lower end is correspondingly hooked on the support (14); when it is a compression spring, its upper end is inserted into the spring hole at the lower part of the short swing rod (11), and its lower end is correspondingly inserted into the spring hole of the support (14).

3. The in-place status detection device according to claim 1, characterized in that: The detection contact surface at the top of the short swing rod (11) is an arc surface.

4. The in-place status detection device according to any one of claims 1 to 3, characterized in that: The bracket (33) is covered with a lower slide plate.

5. The in-place status detection device according to claim 4, characterized in that: The lower slide plate and the upper slide plate (23) are smooth stainless steel plates and / or copper plates.

6. A straightening machine, characterized in that: It comprises an in-place status detection device as described in any one of claims 1-3.

7. A straightening machine, characterized in that: It includes the in-place status detection device as described in claim 5.

8. A method for detecting the in-place status of a straightening machine roller box, characterized in that It includes steps S1 to S4, S1: A height detection device (1) as claimed in claim 1 is installed outside the frame (5) and below the workpiece to be tested, wherein the detection contact surface of the short swing rod (11) is located at the bottom of the workpiece to be tested, and the detection end of the long swing rod (18) and the proximity switch are located outside the frame (5); S2: In the initial state, the long swing rod (18) falls on the limit block (16), the top of the short swing rod (11) is higher than the support surface of the rack rail (3) by a distance h set, the long swing rod (18) corresponds to the maintenance replacement position proximity switch (17) in the proximity switch, and the maintenance replacement position proximity switch (17) sends the "maintenance replacement position" position information to the control system; S3: The test piece is pushed into the rack and moves along the rack rail (3), and the working surface at the bottom of the test piece contacts the top of the short swing rod (11); S4: After the test piece is lowered into position in the rack, the working surface at the bottom of the test piece presses the top of the short swing rod (11), causing the short swing rod (11) to deflect into position, and the detection end of the long swing rod (18) deflected by the rotation of the swing shaft (15) corresponds to the working position proximity switch (13) in the proximity switch, and the working position proximity switch (13) sends "working position" position information to the control system; The method further comprises step S0: providing a positioning groove on the frame rail (3) that matches the wheel set at the bottom of the lower roller box (2), the positioning groove causing the lower roller box (2) to be in a corresponding working position; in step S4, the workpiece to be tested is lowered into position in the frame, i.e., the wheel set is located in the positioning groove, and at this time, the working surface at the bottom of the lower roller box (2) should be in contact with the supporting surface of the frame rail (3); The method further comprises step S01: arranging two supporting brackets (33) on the frame rail (3), and adding two upper slide plates (23) matching with the brackets (33) at the bottom of the lower roller box (2), so that when the wheel set at the bottom of the lower roller box passes through the positioning groove of the front wheel, the lower roller box can slide stably with support.

Images