A mesh belt furnace for heat treatment of high-strength fasteners

Abstract

The present invention provides a mesh belt furnace for heat treatment of high-strength fasteners, wherein a driven roller located on the inner side of the front end of the metal mesh belt conveyor surface is set as an adjusting roller, the middle of the adjusting roller is a cylindrical main roller body and the two ends are extended outward to form a truncated cone-shaped limiting roller end, and a visual detection module is used to simultaneously detect whether there are two abnormal conditions in the mesh belt furnace, namely, unilateral aggregation of fasteners or unilateral deviation of the metal mesh belt, and the abnormal signal is sent to the control module, and the control module sends a corresponding control signal to the execution module. The execution module can solve the above two problems at the same time by only driving the two ends of the adjusting roller to perform corresponding oblique lifting actions respectively. The two problems do not need to be detected and adjusted separately, the equipment improvement cost is low, and it is easy to promote, effectively improving the heat treatment quality of small fasteners and reducing the deviation failure rate of the annular mesh belt.

Description

Technical Field

[0001] The invention relates to processing equipment for high-strength fasteners, in particular to a heat treatment mesh belt furnace for high-strength fasteners. Background Art

[0002] Small fasteners are essential components in industrial production. Industries such as automotive manufacturing, machinery and equipment, medical care, and aerospace all require high-quality bolts, screws, and other fasteners of varying strengths. Specialized equipment, in particular, requires custom-made, custom-shaped fasteners. Heat treatment is a crucial step in the fastener manufacturing process, altering the metal's microstructure to improve the fastener's strength, hardness, and toughness, ultimately meeting the high standards demanded by customers.

[0003] At present, during the processing and production of small fasteners such as bolts and screws, they are usually piled on a mesh belt, and the mesh belt transports the materials in batches to the furnace for continuous sintering and / or heat treatment. In order to improve processing efficiency, small fasteners are usually poured onto the mesh belt in batches when placing the materials. The materials are unevenly distributed and tend to accumulate in a certain area of ​​the mesh belt, such as on the left or right side of the mesh belt. Even after simple flattening, the materials still cannot be evenly distributed across the width of the mesh belt, which can easily lead to uneven force on the left and right sides of the mesh belt, and easily cause tension imbalance on both sides of the mesh belt or deformation of the mesh belt, which in turn causes the position of the mesh belt to shift. In addition, due to their small size, small fasteners such as bolts and screws enter the furnace for heat treatment in a piled state. The fasteners on the outside and the fasteners on the inside are heated unevenly, which directly affects the quality of the heat treatment and thus the performance of the finished fasteners. Currently, workers typically simply push materials out of the pile by hand or with tools. However, the heavy weight of bolts and screws makes leveling difficult, and some fasteners have sharp surfaces that can easily scratch operators. Excessive force can cause them to fall and cause equipment jams. Therefore, it is necessary to develop a mesh belt furnace specifically for batch heat treatment of small fasteners. Summary of the Invention

[0004] The present invention proposes a mesh belt furnace for heat treatment of high-strength fasteners to solve the problems of uneven heating of materials and poor heat treatment effect caused by stacking on the mesh belt when small fasteners are heat-treated in batches, and uneven force on the mesh belt causing deviation.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A mesh belt furnace for heat treatment of high-strength fasteners, comprising a metal mesh belt for conveying the fasteners to be treated and a heat treatment chamber arranged at the rear end of the conveying surface of the metal mesh belt, the heat treatment mesh belt furnace also comprising:

[0007] The adjusting roller is located on the inner side of the front end of the metal mesh belt conveyor and is a driven roller. The middle of the adjusting roller is a cylindrical main roller body, and the two ends of the adjusting roller extend outward to form truncated cone-shaped limiting roller ends. The main roller body of the adjusting roller serves as the main component supporting the metal mesh belt, and the truncated cone-shaped fiber roller ends on both sides serve as limiting guide structures. When the metal mesh belt operates normally and does not deviate, the contact parts of the metal mesh belt and the adjusting roller all fall on the main roller body, and there is no continuous contact with the limiting roller end; when the metal mesh belt deviates on one side, the edge of the metal mesh belt on that side moves to the limiting roller end. At this time, the sloped taper structure of the limiting roller end can cause the metal mesh belt part on it to slide down to the main roller body, playing a certain guiding and returning role.

[0008] The visual inspection module is located above the front end of the metal mesh belt conveyor surface and is used to capture real-time images of the metal mesh belt and the fasteners on its conveyor surface within the visual range, and after detecting the real-time images, send corresponding abnormal signals in the event of abnormal conditions, wherein the abnormal conditions include unilateral accumulation of fasteners and unilateral deviation of the metal mesh belt. The position design of the visual inspection module allows it to capture real-time images for analysis and inspection in a timely manner when the fasteners are just placed at the front end of the metal mesh belt, so as to leave sufficient time for operation and adjustment; if an abnormal condition is detected, especially the abnormal condition of unilateral accumulation of fasteners, the relevant adjustment and control actions can be completed before the fasteners enter the heat treatment chamber, thereby improving the uniformity of the distribution of the fasteners before entering the heat treatment chamber. On the one hand, it avoids excessive accumulation of fasteners entering the heat treatment chamber, causing uneven heating and affecting product quality. On the other hand, it avoids uneven force on the metal mesh belt due to long-term unilateral accumulation of fasteners, further causing problems such as deformation of the metal mesh belt and even unbalanced tension, exacerbating the deviation of the metal mesh belt.

[0009] The control module is signal-connected to the visual inspection module and is configured to generate corresponding control signals based on the received abnormal signals. The control module can also be connected to other mechanisms or modules of the heat treatment mesh belt furnace, such as the mesh belt drive system and the heat treatment chamber temperature control system, to provide overall supervision and control of the mesh belt furnace.

[0010] The execution module is connected to the control module signal and is used to drive one of the two ends of the adjusting roller to perform an oblique lifting action according to the received control signal, wherein the oblique lifting action refers to one of the two ends of the adjusting roller moving obliquely upward from the starting position to a preset distance in the direction away from the rear end of the conveying surface and returning to the starting position. By performing the oblique lifting action on both ends of the adjusting roller, correction and adjustment of the two abnormal conditions of unilateral accumulation of fasteners and unilateral deviation of the metal mesh belt are completed. When one end of the adjusting roller is obliquely lifted, the corresponding side of the metal mesh belt is simultaneously lifted and tilted forward. The lifting of one side of the metal mesh belt causes the fasteners accumulated on that side of the conveying surface to spill to the other side, thereby improving the uniformity of the distribution of the fasteners on the metal mesh belt; the forward tilting of one side of the metal mesh belt causes the metal mesh belt to slide along the adjusting roller to the other side, thereby achieving mesh belt correction.

[0011] When the abnormal situation detected by the visual detection module corresponds to the unilateral aggregation of fasteners, the execution module drives the end of the adjusting roller corresponding to the aggregation side to perform a preset number of oblique lifting actions according to the control signal sent by the control module, so that the corresponding single side of the metal mesh belt conveying surface completes the preset number of liftings; when the abnormal situation detected by the visual detection module corresponds to the unilateral offset of the metal mesh belt, the execution module drives the end of the adjusting roller corresponding to the offset side to perform at least one oblique lifting action according to the control signal sent by the control module until the visual detection module stops sending the corresponding abnormal signal.

[0012] The heat treatment mesh belt furnace of the present invention is based on the characteristics of the small high-strength fasteners it processes, and is modified relatively low-cost, quickly and conveniently on the basis of the existing mesh belt furnace. The visual inspection module is used to simultaneously detect whether there are two abnormal conditions in the mesh belt furnace, namely, fasteners unilaterally gathering or metal mesh belt unilaterally offset. The two problems can be solved at the same time by performing the specified oblique lifting action only by using the adjustment roller. The two problems do not need to be detected and adjusted separately. The equipment improvement cost is low and easy to promote, which effectively improves the heat treatment quality of small fasteners and reduces the offset failure rate of the annular mesh belt.

[0013] In one possible implementation, when the abnormal situation in which fasteners gather on one side and the metal mesh belt deflects on one side occurs on the same side, the execution module drives the adjustment roller to perform an oblique lifting action corresponding to the end on the same side, so as to simultaneously eliminate the abnormalities of fasteners gathering on one side and metal mesh belt deflecting on one side.

[0014] In this implementation, the fasteners gather on the left side of the conveying surface of the metal mesh belt, and the metal mesh belt deviates to the left. The execution module drives the left end of the adjusting roller to perform an oblique lifting action, so that the left side of the metal mesh belt is lifted and the left end is tilted forward. At this time, the fasteners gathered on the left side are evenly distributed to the right side, and the metal mesh belt moves to the right until both abnormal conditions are completely eliminated.

[0015] Similarly, if the fasteners gather on the right side of the conveying surface of the metal mesh belt and the metal mesh belt deviates to the right, the execution module drives the right end of the adjusting roller to perform an oblique lifting action, so that the right side of the metal mesh belt is lifted and the left end is tilted forward. At this time, the fasteners gathered on the right side are evenly distributed to the left side, and the metal mesh belt moves to the left until both abnormal conditions are completely eliminated.

[0016] In one possible implementation, when in the abnormal situation, unilateral aggregation of fasteners occurs on one side and unilateral deviation of the metal mesh belt occurs on the other side, the execution module preferentially drives the end of the adjusting roller corresponding to that side to perform an oblique lifting action to eliminate the abnormality of unilateral aggregation of fasteners, and then drives the end of the adjusting roller corresponding to the other side to perform an oblique lifting action to eliminate the abnormality of unilateral deviation of the metal mesh belt.

[0017] In this implementation, the problem of unilateral aggregation of fasteners is eliminated first, and then the problem of mesh belt offset is eliminated; first, the fasteners on the metal mesh belt must be evenly distributed and adjusted before entering the heat treatment chamber to ensure the heat treatment quality of the batch of fasteners. The adjustment time is only a period of time before the fasteners are transported from the end to the entrance of the heat treatment chamber, and only a preset number of lifts need to be performed. The required time is fixed, so it must be processed first; and the correction adjustment of the metal mesh belt is later. This is because: 1. There is no strict time limit for the correction adjustment of the metal mesh belt, and the time required for the correction adjustment varies depending on the degree of offset of the metal mesh belt, so its priority can be adjusted to the back; 2. Since tapered limiting roller ends are set at both ends of the adjusting roller, it has a certain limiting and guiding effect on the offset metal mesh belt. Therefore, when one side is lifted obliquely to solve the problem of unilateral aggregation of fasteners, the offset of the metal mesh belt on the other side will not be aggravated.

[0018] If the fasteners gather on the left side of the conveying surface of the metal mesh belt and the metal mesh belt deviates to the right, the execution module will first drive the left end of the adjusting roller to perform a preset number of oblique lifting actions to move the accumulated fasteners to the right, thereby eliminating the problem of fastener accumulation on the left side, and then drive the right end of the adjusting roller to perform an oblique lifting action to move the metal mesh belt to the left until the problem of the metal mesh belt deviating to the right is eliminated.

[0019] If the fasteners gather on the right side of the conveying surface of the metal mesh belt and the metal mesh belt deviates to the left, the execution module will first drive the right end of the adjusting roller to perform a preset number of oblique lifting actions to move the accumulated fasteners to the left, thereby eliminating the problem of fastener aggregation on the right side, and then drive the left end of the adjusting roller to perform an oblique lifting action to move the metal mesh belt to the right until the problem of the metal mesh belt deviating to the left is eliminated.

[0020] In one possible implementation, if the distribution number or coverage area of ​​fasteners on one half of the metal mesh belt in the real-time image captured by the visual inspection module exceeds the distribution number or coverage area on the other half by a preset value, then the abnormal situation corresponds to unilateral aggregation of fasteners; and / or, if the edge of one side of the mesh belt in the real-time image captured by the visual inspection module exceeds the preset limit position of the corresponding side of the mesh belt, then the abnormal situation corresponds to unilateral offset of the metal mesh belt.

[0021] In a possible implementation, the execution module includes two propulsion devices respectively movably connected to the two ends of the adjusting roller, the propulsion device includes a push rod and a connecting head, the end of the push rod away from the adjusting roller is fixed on the frame of the heat treatment mesh belt furnace, the end of the push rod close to the adjusting roller is fixedly installed with a connecting head, the extension direction of the push rod points to the upper side of the conveying surface of the metal mesh belt in the horizontal state and away from the heat treatment chamber, a connecting hole is provided on the connecting head, and the two limiting roller ends of the adjusting roller are externally provided with a connecting part, the connecting hole can be movably mounted on the connecting part, the aperture of the connecting hole is larger than the diameter of the connecting part, and the connecting hole accommodates the connecting part to perform an angular tilt and position movement within a set range therein; when the propulsion device on one side drives the corresponding end of the adjusting roller to perform an oblique lifting action, its push rod extends, and the connecting head drives the connecting part inside it to obliquely lift, thereby causing the corresponding end of the adjusting roller to obliquely lift, while the propulsion device on the other side remains stationary, and the position of the other end of the corresponding adjusting roller also remains stationary.

[0022] In a possible implementation, the angle between the extension direction of the push rod and the horizontal plane ranges from 30° to 60°.

[0023] In one possible implementation, a material distributor is provided at the feed inlet at the front end of the heat treatment chamber. The material distributor is arranged parallel to the metal mesh belt. The material distributor includes a material distributor shaft and a material distributor blade installed on the material distributor shaft. The material distributor blade rotates with the material distributor and pushes the fasteners on the metal mesh belt to flatten them.

[0024] In this implementation, the material leveler can "flatten" all the materials accumulated to a certain height again before the materials enter the heat treatment chamber. The material leveler is used in conjunction with the adjusting roller. The adjusting roller is mainly used to spread the materials as flat as possible on the circular mesh belt to achieve uniform distribution, and does not completely limit the stacking height of the materials. The material leveler complements the adjusting roller and averages the height of the accumulated materials before entering the heat treatment furnace, so that small fasteners can be evenly laid on the conveying surface of the metal mesh belt and enter the heat treatment chamber, thereby obtaining better heat treatment processing effects and improving the product quality of the fasteners.

[0025] In one possible implementation, movable side panels are provided on both sides of the feed section of the metal mesh belt located at the front end of the heat treatment chamber. The movable side panels include elastic elements and baffles. The elastic elements are installed on the frames on both sides of the metal mesh belt and extend and retract in the direction of approaching / moving away from the center of the metal mesh belt. The back of the baffle is connected to the end of the elastic element.

[0026] In this implementation, movable side panels are set up using elastic elements, which can effectively prevent materials on the metal mesh belt from sliding from the left and right sides into the gap and causing equipment jamming, and the movable baffle can better adapt to the left and right position adjustment of the metal mesh belt.

[0027] In one possible implementation, the baffle is located above the inner side of the edge of the metal mesh belt, and the height of the gap between the bottom end of the baffle and the metal mesh belt is so small that a single fastener on the metal mesh belt cannot fall into the gap.

[0028] In this implementation, the structure of the baffle is relatively simple, and there is a gap between it and the metal mesh belt, so there is no friction and it will not affect the operation of the metal mesh belt. The height of the gap is such that a single fastener on the mesh belt cannot fall into the gap, effectively preventing the fastener from getting stuck in the gap or falling from the gap.

[0029] In one possible implementation, the baffle includes a first vertical plate, a transverse plate, and a second vertical plate. The first vertical plate is located above the inner side of the edge of the metal mesh belt, one end of the transverse plate is connected to the bottom end of the first vertical plate, and the other end is connected to the top end of the second vertical plate. The second vertical plate is located outside the edge of the metal mesh belt and its bottom end extends to the bottom of the metal mesh belt.

[0030] In this implementation, in addition to effectively preventing the fasteners on the metal mesh belt from getting stuck in the edge gap, the second vertical plate below it is close to the edge of the metal mesh belt. When the metal mesh belt is obviously offset at a certain point, it will push the second vertical plate to offset, causing the movable side plate to offset as a whole, which is conducive to the visual inspection module to quickly detect the offset of the metal mesh belt.

[0031] In a possible implementation, a marking line parallel to the edge of the metal mesh belt is provided in the middle of the metal mesh belt, and the marking line is used to assist the visual inspection module in quickly detecting material distribution information on the metal mesh belt.

[0032] In this implementation, the marking line is used as the dividing line. The left side of the marking line is the left side of the metal mesh belt, and the right side of the marking line is the right side of the metal mesh belt. The existence of the marking line facilitates the visual inspection module to quickly detect the left and right distribution of fasteners on the metal mesh belt and accurately determine whether there is a fastener aggregation problem.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] A visual inspection module is set above the front end of the conveyor surface of the metal mesh belt. The shooting hardware and visual algorithm are used to simultaneously detect the existence of two abnormal conditions: unilateral aggregation of fasteners and unilateral deviation of the metal mesh belt. An adjusting roller with both ends extended outward to form a tapered structure is set. The execution module is used to sequentially drive the left or right end of the adjusting roller to perform an oblique lifting action, which can simultaneously solve the problems of unilateral aggregation of fasteners and unilateral deviation of the metal mesh belt.

[0035] The problem of fasteners gathering on one side can be captured by the visual inspection module in real time when they are just placed on the front end of the metal mesh belt. Once the problem of fasteners gathering on one side occurs, it can be detected and adjusted in time. The adjustment time is sufficient between the fasteners being transported from the front end of the metal mesh belt to the heat treatment chamber, and a better uniform distribution effect can be obtained, thereby obtaining a better fastener heat treatment effect. In addition, the problem of fasteners gathering on one side is quickly resolved, and deformation, offset and other problems caused by uneven force on the metal mesh belt for a long time can be effectively avoided.

[0036] The limiting roller end structure at both ends of the adjusting roller of the present invention can play a certain guiding role on the metal mesh belt, reduce the probability of the metal mesh belt deviation, and when the metal mesh belt is corrected, it can assist the deviated side of the metal mesh belt to slide down quickly to the main roller body along the taper of the limiting roller end, and accelerate the return to the right position; the limiting roller end can also play a limiting role on the metal mesh belt. When the adjusting roller is driven to perform an oblique lifting action to solve the need to solve the unilateral accumulation of fasteners, the taper of the limiting roller end on the non-lifted side can prevent the edge of the metal mesh belt that has not deviated or has deviated to the limiting roller end from continuing to deviate.

[0037] Based on the existing mesh belt furnace, the present invention replaces the driven roller at the front end with an adjusting roller, and arranges a visual detection module, an execution module and a control module outside the furnace body. The furnace body structure of the mesh belt furnace is slightly changed, the modules outside the furnace body are convenient and quick to install, the production cost is low, and it is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 It is a schematic diagram of the overall structure of the heat treatment mesh belt furnace of the present invention;

[0040] Figure 2 This is a control structure block diagram of the heat treatment mesh belt furnace of the present invention;

[0041] Figure 3 It is a structural schematic diagram of the adjusting roller of the present invention;

[0042] Figure 4 This is a schematic diagram of the internal side structure of the front end feeding section of the heat treatment mesh belt furnace of the present invention;

[0043] Figure 5 This is a schematic diagram of the top view of the front feeding section of the heat treatment mesh belt furnace of the present invention;

[0044] Figure 6 A side view of a state change of one side of an adjustment roller when performing a forward lifting action according to an embodiment of the present invention;

[0045] Figure 7 A top view of a state change of one side of an adjustment roller when performing a forward lifting action according to an embodiment of the present invention;

[0046] Figure 8 A structural diagram of a movable baffle;

[0047] Figure 9 Schematic diagram of another structure of the movable baffle;

[0048] Figure 10 This is a control flow chart of a heat treatment mesh belt according to one embodiment of the present invention.

[0049] Among them, there are metal mesh belt 10, conveying surface 101, heat treatment chamber 20; adjusting roller 1, main roller body 11, limiting roller end 12, connecting part 13; visual detection module 2, visual range 21; control module 3, execution module 4, propulsion device 41, push rod 411, connecting head 412, connecting hole 4121, material equalizer 5, movable side plate 6, elastic element 61, baffle 62, first vertical plate 621, horizontal plate 622, second vertical plate 623, marking line 7. DETAILED DESCRIPTION

[0050] In order to further understand the purpose, structure, features, and functions of the present invention, this section will describe specific embodiments of the present invention in detail.

[0051] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0052] In the description of the present invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeds," etc. are understood to exclude the number itself, and "above," "below," "within," etc. are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0053] In the description of the present invention, unless otherwise clearly defined, words such as “setting”, “installation” and “connection” should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above words in the present invention based on the specific content of the technical solution.

[0054] The mesh belt furnace is generally a sintering furnace in which the parts are continuously or intermittently fed into the heat treatment furnace by a mesh belt protected by a muffle, and the metal mesh belt 10 in the mesh belt furnace is supported by a roller group. If the feeding end is not the front end and the discharging end is not the rear end, the front end of the metal mesh belt 10 is located in front of the feeding port of the heat treatment chamber 20. Figure 1 As shown, in the prior art, the front end roller of the metal mesh belt 10 is usually provided with three driven rollers. After passing the three driven rollers, the top surface of the metal mesh belt 10 parallel to the horizontal plane is the conveying surface 101. The material is placed on the conveying surface 101 and sent to the heat treatment chamber 20 for heat treatment.

[0055] Combined with reference Figures 1-4 A mesh belt furnace for heat treatment of high-strength fasteners includes a metal mesh belt 10 for conveying the fasteners to be treated and a heat treatment chamber 20 disposed at the rear end of the conveying surface 101 of the metal mesh belt 10. The heat treatment mesh belt furnace also includes an adjusting roller 1, a visual inspection module 2, a control module 3, and an execution module 4.

[0056] The regulating roller 1 is located inside the front end of the conveying surface 101 of the metal mesh belt 10 and is a driven roller. Figure 3 As shown, the middle of the adjusting roller 1 is a cylindrical main roller body 11, and both ends of the adjusting roller 1 are extended outward to form truncated cone-shaped limiting roller ends 12.

[0057] The visual inspection module 2 is located above the front end of the conveying surface 101 of the metal mesh belt 10, and is used to capture the real-time image of the metal mesh belt 10 and the fasteners on its conveying surface 101 within the visual range 21, and after detecting the real-time image, send corresponding abnormal signals in abnormal situations, where the abnormal situations include unilateral aggregation of fasteners and unilateral offset of the metal mesh belt 10.

[0058] The control module 3 is signal-connected to the visual detection module 2 for generating a corresponding control signal according to the received abnormal signal.

[0059] like Figure 1 and Figure 2 As shown, the execution module 4 is connected to the control module 3 by signal, and is used to drive one of the two end portions of the adjusting roller 1 to perform an oblique lifting action according to the received control signal, wherein the oblique lifting action refers to one of the two end portions of the adjusting roller 1 moving obliquely upward from the starting position toward the direction away from the rear end of the conveying surface 101 a preset distance and returning to the starting position.

[0060] The present invention replaces the driven roller located at the front end inner side of the conveying surface 101 of the metal mesh belt 10 in the front roller group of the hot-steam furnace with an adjusting roller 1. The adjusting roller 1 is also structurally improved, with both ends of the adjusting roller 1 extending outward to form truncated cone-shaped limiting roller ends 12, resulting in a tapered structure at both ends of the adjusting roller 1. The main roller body 11 of the adjusting roller 1 serves as the primary component supporting the metal mesh belt 10, while the truncated cone-shaped fiber roller ends on either side serve as limiting guide structures. When the metal mesh belt 10 is operating normally and not deflecting, the entire contact area between the metal mesh belt 10 and the adjusting roller 1 falls on the main roller body 11, with no continuous contact between the metal mesh belt 10 and the limiting roller end 12. When the metal mesh belt 10 deflects on one side, the edge of that side of the metal mesh belt 10 moves onto the limiting roller end 12. At this time, the sloped tapered structure of the limiting roller end 12 can cause the portion of the metal mesh belt 10 on it to slide down onto the main roller body 11, providing a certain degree of guidance and return.

[0061] In some embodiments, both ends of the adjusting roller 1 can be respectively installed in sliding bearing seats, and the sliding bearing seats are slidably arranged on the bracket of the mesh belt furnace, thereby realizing the sliding installation between the adjusting roller 1 and the mesh belt furnace bracket.

[0062] The visual inspection module 2 is arranged at the front end of the metal mesh belt 10. When the fasteners are just placed at the front end of the metal mesh belt 10, real-time images can be captured in time for analysis and inspection. Once the problem of unilateral aggregation of fasteners occurs, it can be detected and adjusted in time. The unilateral aggregation of fasteners can be adjusted from the front end of the metal mesh belt 10 to the heat treatment chamber 20. The adjustment time is relatively sufficient, and the execution of relevant adjustment control actions can be completed before the fasteners enter the heat treatment chamber 20, thereby improving the uniformity of distribution of fasteners before entering the heat treatment chamber 20. On the one hand, it avoids excessive accumulation of fasteners entering the heat treatment chamber 20, causing uneven heating and affecting product quality. On the other hand, it avoids deformation, offset and other problems caused by uneven force on the metal mesh belt 10 due to long-term unilateral aggregation of fasteners on the metal mesh belt 10.

[0063] In some embodiments, the visual detection module 2 can use an image capture and processing device, such as a camera and a corresponding processor; a commercially available visual detection module 2 can be selected according to actual needs, such as shooting accuracy requirements, anti-shake requirements, ambient temperature requirements, data processing requirements, etc., which will not be repeated here.

[0064] In some embodiments, if the distribution number or coverage area of ​​fasteners on one half of the metal mesh belt 10 in the real-time image captured by the visual inspection module 2 exceeds the distribution number or coverage area on the other half by a preset value, the abnormal situation corresponds to the unilateral aggregation of fasteners; and / or, if the edge of one side of the metal mesh belt 10 in the real-time image captured by the visual inspection module 2 exceeds the preset corresponding side limit positions of the two side edges of the mesh belt, the abnormal situation corresponds to the unilateral offset of the metal mesh belt 10.

[0065] First, the visual module specifically determines whether there is an abnormal situation of unilateral aggregation of fasteners in the captured real-time image. A preset value can be set in the visual detection module 2, which can be the maximum number difference or maximum area difference of the distribution of fasteners on the left and right sides of the metal mesh belt. The visual detection module 2 is used to respectively detect the distribution number or distribution area of ​​fasteners in the left half of the metal mesh belt 10 and the distribution number or distribution area of ​​the right half, and compare the number of fasteners in the left half of the real-time image with the number of fasteners in the right half or the distribution area. When the fasteners in the left half of the metal mesh belt 10 in the real-time image captured by the visual detection module 2 exceed the preset value of the maximum number difference or maximum area difference in the right half, it means that the fasteners are aggregated on the left side, and an abnormal signal A1 is sent; when the fasteners in the right half of the metal mesh belt 10 in the real-time image captured by the visual detection module 2 exceed the preset value of the maximum number difference or maximum area difference in the left half, it means that the fasteners are aggregated on the right side, and an abnormal signal A2 is sent.

[0066] In a more preferred embodiment, Figure 5 As shown, a marking line 7 parallel to the edge of the metal mesh belt 10 is provided in the middle of the metal mesh belt 10. The marking line 7 is used to assist the visual inspection module 2 in quickly detecting the material distribution information on the metal mesh belt 10. The area to the left of the marking line 7 is the left side of the metal mesh belt 10, and the area to the right of the marking line 7 is the right side of the metal mesh belt 10. The presence of the marking line 7 facilitates the visual inspection module 2 to quickly detect the left-right distribution of fasteners on the metal mesh belt 10 and accurately determine whether there is a problem of fastener aggregation.

[0067] Secondly, the visual module specifically determines whether there is an abnormal situation of the metal mesh belt 10 being offset in the captured real-time image. The left limit position of the mesh belt and the right limit position of the mesh belt can be preset in the visual detection module 2. When the left edge of the mesh belt in the real-time image captured by the visual detection module 2 exceeds the preset left limit position of the mesh belt, it means that the mesh belt is deviated to the left, and an abnormal signal B1 is sent; when the right edge of the mesh belt in the real-time image captured by the visual detection module 2 exceeds the preset right limit position of the mesh belt, it means that the mesh belt is deviated to the right, and an abnormal signal B2 is sent.

[0068] In a more preferred embodiment, when both the left and right ends of the adjusting roller 1 are in the starting position, in the real-time image captured by the visual inspection module 2, the image of the left end of the main roller body 11 of the adjusting roller 1 coincides with the preset left extreme position of the mesh belt, and the image of the right end of the main roller body 11 of the adjusting roller 1 coincides with the preset right extreme position of the mesh belt; when the left edge and the right edge of the metal mesh belt 10 are both located on the main roller body 11, the position of the metal mesh belt 10 is within the normal range without deviation. The two ends of the main roller body 11 of the adjusting roller 1 are set to coincide with the extreme positions of the two side edges of the metal mesh belt 10. Once the metal mesh belt 10 deviates to one side, the edge of the metal mesh belt 10 on that side will move to the limiting roller end 12 on that side. On the one hand, it can help the visual inspection module 2 quickly detect the mesh belt deviation problem. On the other hand, the taper of the limiting roller end 12 can assist the metal mesh belt 10 to return to the right position, which is beneficial to the mesh belt deviation correction.

[0069] After the visual inspection module 2 compares the captured real-time image with the preset value, if an abnormality is detected, different abnormal signals A1, A2, B1, and B2 are sent according to the different abnormal conditions; these four abnormal signals can be sent individually or in combination of two, but A1 and A2 cannot be sent in combination, and B1 and B2 cannot be sent in combination.

[0070] The control module 3 serves as the data processing center, receiving the abnormality signals sent by the visual inspection module 2, generating different control signals based on the abnormality signals, and sending them to the execution module 4 to perform the corresponding control actions. The control signals in the control module 3 include C1, C2, C3, and C4, which correspond to the abnormality signals A1, A2, B1, and B2 sent by the visual inspection module 2, respectively.

[0071] In some embodiments, the control module 3 can also be connected to other mechanisms or modules of the heat treatment mesh belt furnace, such as the mesh belt drive system and the temperature control system of the heat treatment chamber 20, to form an overall supervision and control of the mesh belt furnace. The control module 3 can use various control systems built around various chips, such as a PLC control system.

[0072] The execution module 4 is used to receive the control signal from the control module 3 and perform corresponding actions. Specifically, it eliminates all abnormal signals by performing an oblique lifting action on both ends of the adjusting roller 1. When one end of the adjusting roller 1 is lifted obliquely, the corresponding side of the metal mesh belt 10 is simultaneously lifted and tilted forward. The lifting of one side of the metal mesh belt 10 causes the fasteners accumulated on that side of the conveying surface 101 to spill to the other side, improving the uniformity of the distribution of the fasteners on the metal mesh belt 10, which can eliminate abnormal signals A1 or A2. The forward tilting of one side of the metal mesh belt 10 causes the metal mesh belt 10 to slide along the adjusting roller 1 to the other side, thereby achieving mesh belt deviation correction, which can eliminate abnormal signals B1 or B2.

[0073] In some embodiments, as Figure 4-Figure 7 As shown, the execution module 4 includes two propulsion devices 41 respectively connected to the two ends of the adjusting roller 1, the propulsion device 41 includes a push rod 411 and a connecting head 412, the end of the push rod 411 away from the adjusting roller 1 is fixed on the frame of the heat treatment mesh belt furnace, the end of the push rod 411 close to the adjusting roller 1 is fixedly installed with a connecting head 412, the extension direction S of the push rod 411 points to the top of the conveying surface 101 of the metal mesh belt 10 in the horizontal state and away from the heat treatment chamber 20, a connecting hole 4121 is provided on the connecting head 412, and the two limiting roller ends 12 of the adjusting roller 1 are both provided with connecting holes. The connecting hole 4121 is movably mounted on the connecting portion 13. The diameter of the connecting hole 4121 is larger than the diameter of the connecting portion 13 and accommodates the connecting portion's internal tilting and positional movement within a set range. When the propulsion device 41 on one side drives the corresponding end of the adjusting roller 1 to perform an oblique lifting action, its push rod 411 extends, and the connector 412 drives the connecting portion 13 inside it to obliquely lift, thereby causing the corresponding end of the adjusting roller 1 to obliquely lift. At the same time, the propulsion device 41 on the other side remains stationary, and the position of the corresponding other end of the adjusting roller 1 also remains stationary. After the push rod extends to a preset length, it can be set to remain for 1-5 seconds according to actual conditions before retracting to its initial position, at which point a forward lifting action is completed.

[0074] like Figure 6 and Figure 7 As shown in FIG, when the propulsion device 41 on one side of the execution module 4 is extended, the corresponding end of the adjustment roller 1 performs a forward lifting action, that is, it is lifted and tilted forward at the same time. Figure 6 As shown, the corresponding end of the adjusting roller 1 is lifted upward, and the corresponding side of the metal mesh belt 10 is lifted upward, while the other end of the adjusting roller 1 remains unchanged, and the height of the other side of the metal mesh belt 10 remains unchanged, forming a height difference on both sides, and the gathered fasteners are poured to the other side along the height difference, improving the distribution uniformity of the fasteners on the metal mesh belt; at the same time, its forward tilt is as shown Figure 7 As shown, the corresponding end of the adjusting roller 1 tilts forward, the corresponding side of the metal mesh belt 10 tilts forward, and the other side remains unchanged, forming an inclined angle, and the offset metal mesh belt 10 moves to the other side along the inclined angle.

[0075] In one embodiment, the angle between the extension direction S of the push rod 411 and the horizontal plane is in the range of 30°-60°. Preferably, it can be set to 45°.

[0076] In some embodiments, the push rod 411 of the propulsion device 41 can be a cylinder, a hydraulic rod, an electric push rod or any other device that can push the end of the adjusting roller 1 to move obliquely upward. The telescopic direction of the push rod 411 during actual installation or the angle with the horizontal plane, as well as the telescopic length limited for each forward lifting action during actual operation can be set by selecting the optimal value after multiple tests based on actual conditions.

[0077] When the abnormal situation detected by the visual detection module 2 corresponds to the unilateral aggregation of fasteners, the execution module 4 drives the adjusting roller 1 to perform a preset number of oblique lifting actions on the end corresponding to the aggregation side according to the control signal sent by the control module 3, so that the corresponding single side of the conveying surface 101 of the metal mesh belt 10 completes the preset number of liftings; when the abnormal situation detected by the visual detection module 2 corresponds to the unilateral offset of the metal mesh belt 10, the execution module 4 drives the adjusting roller 1 to perform at least one oblique lifting action on the end corresponding to the offset side according to the control signal sent by the control module 3 until the visual detection module 2 stops sending the corresponding abnormal signal.

[0078] In some embodiments, when the visual inspection module 2 detects that the fasteners are gathered on one side, that is, the control module 3 receives the abnormal signal A1 or A2, it sends the control signal C1 or C2 to the execution module 4 accordingly. At this time, the execution module 4 performs the material equalization action according to the control signal. If the control signal C1 is received, the left end of the adjusting roller 1 is controlled to be lifted obliquely for a preset number of times; if the control signal C2 is received, the right end of the adjusting roller 1 is controlled to be lifted obliquely for a preset number of times.

[0079] Furthermore, the preset number of times can be set to different numbers after testing according to different actual conditions, for example, any number among 1, 2, and 3 times. Preferably, it is ensured that the fastener has not entered the heat treatment chamber 20 after the material balancing action is completed.

[0080] In some embodiments, when the visual inspection module 2 detects that the metal mesh belt 10 is offset, that is, the control module 3 receives the abnormal signal B1 or B2, it sends a control signal C3 or C4 to the execution module 4 accordingly. At this time, the execution module 4 performs a correction action according to the control signal. If the control signal C3 is received, the left end of the adjustment roller 1 is controlled to be lifted obliquely at least once until the visual inspection module 2 stops sending the corresponding abnormal signal; if the control signal C4 is received, the right end of the adjustment roller 1 is controlled to be lifted obliquely at least once until the visual inspection module 2 stops sending the corresponding abnormal signal.

[0081] In the above embodiment, when the execution module 4 performs a material balancing action or a deviation correction action, the corresponding end tilt angle and elevation height of the adjusting roller 1 are determined by the length of the push rod of the execution module 4 pushed linearly in the tilt direction. The longer the length, the greater the forward tilt angle and upward elevation height of the adjusting roller 1. When performing a material balancing action or a deviation correction action, the tilt angle and elevation height of the adjusting roller 1 each time can be selected based on actual conditions after multiple tests, and the corresponding values ​​are set to the movement direction and distance of the push rod in the execution module 4.

[0082] like Figure 10 As shown, the heat treatment mesh belt furnace of the present invention includes the following situations when in use.

[0083] Case 1: The visual inspection module 2 detects an abnormal situation and sends an abnormal signal. The control module 3 receives any abnormal signal from A1, A2, B1, and B2, and sends a corresponding control signal from C1, C2, C3, and C4 to the execution module 4. After receiving the control signal, the execution module 4 drives the adjustment roller 1 to perform the corresponding oblique lifting action.

[0084] Case 2: The visual inspection module 2 detects two abnormal situations at the same time, and in the two abnormal situations, the unilateral aggregation of fasteners and the unilateral deviation of the metal mesh belt 10 occur on the same side. The execution module 4 drives the adjustment roller 1 to perform an oblique lifting action corresponding to the end on the same side to simultaneously eliminate the abnormalities of unilateral aggregation of fasteners and unilateral deviation of the metal mesh belt 10.

[0085] When the visual inspection module 2 sends abnormal signals A1 and B1, the control module 3 first sends the C1 signal to the execution module 4, and the execution module 4 drives the left side of the adjusting roller 1 to perform an oblique lifting action; first execute the preset oblique lifting times of the full material equalization action, so that the fasteners are spilled to the right while the metal mesh belt 10 moves to the right. After the execution is completed, the abnormal signal A1 is reduced. At this time, if the abnormal signal B1 stops being sent, the control signal C2 is reduced, the left side of the adjusting roller 1 stops being lifted obliquely, and the overall adjustment is completed; if the abnormal signal B1 still exists, the control module 3 sends the C2 signal to the execution module 4 again, and the execution module 4 continues to drive the left end of the adjusting roller 1 to perform an oblique lifting action until the abnormal signal B1 stops being sent, the metal mesh belt 10 returns to the normal position, and the overall adjustment is completed.

[0086] When the visual inspection module 2 sends abnormal signals A2 and B2, the execution module 4 drives the adjusting roller 1 to drive the right side of the adjusting roller 1 to perform an oblique lifting action according to the above operation, first performs the material leveling action to reduce the abnormal signal A2, and then performs the correction action until the abnormal signal B2 stops sending, the metal mesh belt 10 returns to the straight position, and the overall adjustment is completed.

[0087] Case three: The visual inspection module 2 detects two abnormal situations at the same time, and in the two abnormal situations, the unilateral aggregation of fasteners occurs on one side and the unilateral deviation of the metal mesh belt 10 occurs on the other side. The execution module 4 preferentially drives the adjusting roller 1 to perform an oblique lifting action at the end corresponding to that side to eliminate the abnormality of unilateral aggregation of fasteners, and then drives the adjusting roller 1 to perform an oblique lifting action at the end corresponding to the other side to eliminate the abnormality of unilateral deviation of the metal mesh belt 10.

[0088] When the visual inspection module 2 sends abnormal signals A1 and B2, the control module 3 first sends a C1 signal to the execution module 4, and the execution module 4 drives the left side of the adjusting roller 1 to perform an oblique lifting action, so that the fasteners are tilted to the right to achieve uniform distribution of materials. After the preset number of executions are completed, the abnormal signal A1 disappears; then the control module 3 sends a C4 signal to the execution module 4, and the execution module 4 drives the right side of the adjusting roller 1 to perform an oblique lifting action, and the metal mesh belt 10 moves to the left until the visual inspection module 2 detects that the position of the metal mesh belt 10 has returned to the normal position and stops sending the abnormal signal B2, and the overall adjustment is completed.

[0089] When the visual inspection module 2 sends abnormal signals A2 and B3, the control module 3 first sends a C2 signal to the execution module 4, and the execution module 4 drives the right side of the adjusting roller 1 to perform an oblique lifting action, so that the fasteners are tilted to the left to achieve uniform distribution of materials. After the preset number of executions are completed, the abnormal signal A2 disappears; then the control module 3 sends a C3 signal to the execution module 4, and the execution module 4 drives the left side of the adjusting roller 1 to perform an oblique lifting action, and the metal mesh belt 10 moves to the right until the visual inspection module 2 detects that the position of the metal mesh belt 10 has returned to the normal position and stops sending the abnormal signal B3, and the overall adjustment is completed.

[0090] In case three, the problem of fasteners gathering on one side is solved first, and then the problem of mesh belt deviation is solved. First, the fasteners on the metal mesh belt 10 must be evenly distributed and adjusted before entering the heat treatment chamber 20 to ensure the heat treatment quality of the batch of fasteners. The adjustment time is only a period of time before the fasteners are transported from the end to the entrance of the heat treatment chamber 20, and only a preset number of lifts need to be performed. The required time is fixed, so it must be processed first; and the deviation correction adjustment of the metal mesh belt 10 is done later. This is because: 1. There is no strict time limit for the deviation correction adjustment of the metal mesh belt 10, and the time required for the deviation correction adjustment varies depending on the degree of deviation of the metal mesh belt 10, so its priority can be adjusted later; 2. Since the two ends of the adjusting roller 1 are provided with tapered limiting roller ends 12, they have a certain limiting and guiding effect on the deviated metal mesh belt 10. Therefore, when one side is lifted obliquely to solve the problem of fasteners gathering on one side, the deviation of the metal mesh belt 10 on the other side will not be aggravated.

[0091] In some embodiments, after the execution module 4 completes the control action corresponding to the control signal C1, the fasteners corresponding to the control signal C1 are transported by the metal mesh belt 10 to outside the visual range 21 of the visual inspection module 2. Similarly, after the execution module 4 completes the control action corresponding to the control signal C2, the fasteners corresponding to the control signal C2 are transported by the metal mesh belt 10 to outside the visual range 21 of the visual inspection module 2. This embodiment ensures that if a batch of fasteners in the real-time image after being captured has abnormal distribution and has undergone a material balancing action, the batch of fasteners will be transported outside the capture range of the visual inspection module 2 and will not be affected by repeated capture and inspection.

[0092] In some embodiments, if the mesh belt furnace itself detects that the metal mesh belt 10 is not tensioned enough as a whole and generates an abnormal signal to send to the control module 3, the control module 3 generates a corresponding control signal and sends the control signal to the execution module 4. The execution module 4 simultaneously drives the left and right sides of the adjusting roller 1 to perform an oblique lifting action, so that the adjusting roller 1 moves parallel to the upper side for a set distance and remains stationary, thereby tensioning the metal mesh belt 10 as a whole.

[0093] In some embodiments, as Figure 1 As shown, a material leveler 5 is provided at the feed port at the front end of the heat treatment chamber 20. The material leveler 5 is arranged parallel to the metal mesh belt 10. The material leveler 5 includes a material leveling shaft and a material leveling blade installed on the material leveling shaft. The material leveling blade rotates with the material leveling and pushes and flattens the fasteners on the metal mesh belt 10. The material leveler 5 can "flatten" all the materials accumulated to a certain height before the materials enter the heat treatment chamber 20. The material leveler 5 is used in conjunction with the adjusting roller 1. The adjusting roller 1 is mainly used to flatten the materials on the annular mesh belt as much as possible to achieve uniform distribution, and does not completely limit the stacking height of the materials. The material leveler 5 complements the adjusting roller 1 and averages the height direction of the accumulated materials before entering the heat treatment furnace, so that small fasteners can be evenly laid on the conveying surface 101 of the metal mesh belt 10 and enter the heat treatment chamber 20, thereby obtaining a better heat treatment processing effect and improving the product quality of the fasteners.

[0094] In some embodiments, as Figure 4 and Figure 5As shown, the metal mesh belt 10 is provided with movable side panels 6 on both sides of the feed section at the front end of the heat treatment chamber 20. The movable side panels 6 include elastic elements 61 and baffles 62. The elastic elements 61 are mounted on frames on both sides of the metal mesh belt 10 and extend and retract in a direction toward or away from the center of the metal mesh belt 10. The back of the baffles 62 is connected to the ends of the elastic elements 61. Furthermore, the baffles 62 are positioned above the inner edge of the metal mesh belt 10. The gap between the bottom end of the baffles 62 and the metal mesh belt 10 is so small that a single fastener on the metal mesh belt 10 cannot fall into the gap. The elastic elements 61 can be commercially available products such as springs.

[0095] In this embodiment, movable side panels 6 are positioned on opposite sides of the furnace frame to prevent small fasteners on the mesh belt from slipping off the edge and into the gaps, potentially causing equipment jams and malfunctions, thereby ensuring the proper operation of the mesh belt furnace. Elastic elements 61 are used to configure baffles 62 into a resilient, movable structure that can extend and retract perpendicular to the movement of the mesh belt 10. When fasteners on the mesh belt 10 gather and squeeze against the movable side panels 6, the squeeze force exerted by the fasteners causes the movable side panels 6 to move slightly outward, reducing friction with the material and preventing damage to the surface of the small fasteners, effectively protecting the surface quality and precision of the small fasteners. In addition, when the fasteners gather and squeeze the baffle 62, it means that the fasteners are unevenly distributed on the left and right sides of the metal mesh belt 10, so the material needs to be evenly distributed through the adjusting roller 1. Since the side where the fasteners gather will squeeze the movable side plate 6 to move outward to compress the elastic element 61, when the adjusting roller 1 performs an oblique lifting action on that side, the metal mesh belt 10 is lifted on that side, and the other side is relatively low, and the gathered fasteners are poured to the right. At this time, due to the action of gravity and the squeezing force of the fasteners on the movable side plate 6 becomes smaller, the elastic element 61 stretches, and the movable side plate 6 pushes the material toward the center of the metal mesh belt 10, and the small fasteners that are assisted in being poured and evenly distributed to the other side, so this structure can also play a good role in assisting the material to be evenly distributed, and also does not require additional structure and control operations.

[0096] In some embodiments, as Figure 4 and Figure 6As shown, movable side panels 6 are provided on both sides of the feed section of the metal mesh belt 10 at the front end of the heat treatment chamber 20. The movable side panels 6 include elastic elements 61 and baffles 62. The elastic elements 61 are mounted on the frames on both sides of the metal mesh belt 10 and extend and retract in the direction of approaching / moving away from the center of the metal mesh belt 10. The back of the baffles 62 is connected to the end of the elastic elements 61. Furthermore, the baffles 62 include a first vertical plate 621, a transverse plate 622, and a second vertical plate 623. The first vertical plate 621 is located above the inner side of the edge of the metal mesh belt 10. One end of the transverse plate 622 is connected to the bottom end of the first vertical plate 621 and the other end is connected to the top end of the second vertical plate 623. The second vertical plate 623 is located outside the edge of the metal mesh belt 10 and its bottom end extends to the bottom of the metal mesh belt 10.

[0097] In this embodiment, the baffle 62 of the movable side panel 6 is slightly different in structure from the baffle 62 in the above embodiment, and extends to the outer side and lower side of the metal mesh belt 10. In addition to having the functions in the above embodiment, when the metal mesh belt 10 is obviously offset at a certain position, it will push the second vertical plate 623 to offset, causing the movable side panel 6 to offset as a whole, which is beneficial for the visual inspection module 2 to quickly detect the mesh belt offset; especially the metal mesh belt 10 in the mesh belt furnace is usually a metal woven mesh. During operation, it is possible that one part of the metal mesh belt 10 is offset, but other parts are still within the normal operating area. In this case, if the offset part is outside the detection area of ​​the visual inspection module 2 or at the edge of the detection area, it is difficult to be detected in time. When it is detected, the adjustment time is short and the correction adjustment effect is poor. In this embodiment, the second vertical plate 623 is a whole long plate extending along the material transportation direction. Preferably, a lightweight plate is selected. In this way, no matter which part of the metal mesh belt 10 is offset, the second vertical plate 623 will be pushed outward as a whole, causing the baffle 62 to be offset, and the offset can be easily detected by the visual detection module 2, so that correction adjustments can be made as soon as possible.

[0098] In some embodiments, as Figure 5 As shown, a marking line 7 parallel to the edge of the metal mesh belt 10 is provided in the middle of the metal mesh belt 10. The marking line 7 is used to assist the visual inspection module 2 in quickly detecting the material distribution information on the metal mesh belt 10. The area to the left of the marking line 7 is the left side of the metal mesh belt 10, and the area to the right of the marking line 7 is the right side of the metal mesh belt 10. The presence of the marking line 7 facilitates the visual inspection module 2 to quickly detect the left-right distribution of fasteners on the metal mesh belt 10 and accurately determine whether there is a problem of fastener aggregation.

[0099] The heat treatment mesh belt furnace of the present invention is based on the characteristics of the small high-strength fasteners it processes, and is modified relatively low-cost, quickly and conveniently on the basis of the existing mesh belt furnace. The visual inspection module 2 is used to simultaneously detect whether there are two abnormal conditions in the mesh belt furnace, namely, fasteners unilaterally gathering or metal mesh belt 10 unilaterally offset. The two problems mentioned above can be solved at the same time by performing the specified oblique lifting action only by using the adjustment roller 1. The two problems do not need to be detected and adjusted separately. The equipment improvement cost is low and easy to promote, which effectively improves the heat treatment quality of small fasteners and reduces the offset failure rate of the annular mesh belt.

[0100] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0101] The present invention has been described by the above-mentioned embodiments. However, the above-mentioned embodiments are merely examples of implementing the present invention and are used to help understand the technical solutions and core concepts of this application. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention; on the contrary, the technical solutions described in the above-mentioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents; modifications and embellishments made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A mesh belt furnace for heat treatment of high-strength fasteners, comprising a metal mesh belt for conveying fasteners to be treated and a heat treatment chamber arranged at the rear end of the metal mesh belt conveyor surface, characterized in that The heat treatment mesh belt furnace also includes: The adjusting roller is located on the inner side of the front end of the metal mesh belt conveyor and is a driven roller. The middle of the adjusting roller is a cylindrical main roller body, and the two ends of the adjusting roller are extended outward to form a truncated cone-shaped limiting roller end; a visual inspection module, located above the front end of the metal mesh belt conveyor surface, for capturing real-time images of the metal mesh belt and the fasteners on its conveyor surface within a visual range, and sending corresponding abnormal signals in the event of abnormal conditions after detecting the real-time images, wherein the abnormal conditions include unilateral accumulation of fasteners and unilateral deviation of the metal mesh belt; a control module, signal-connected to the visual detection module, for generating a corresponding control signal according to the received abnormal signal; an execution module, connected to the control module by signal, for driving one of the two ends of the adjusting roller to perform an oblique lifting action according to a received control signal, wherein the oblique lifting action refers to one of the two ends of the adjusting roller moving obliquely upward from a starting position toward a direction away from the rear end of the conveying surface by a preset distance and then returning to the starting position; When the abnormality detected by the visual inspection module corresponds to the unilateral accumulation of fasteners, the execution module drives the end portion of the adjusting roller corresponding to the accumulation side to perform a preset number of oblique lifting actions according to the control signal sent by the control module, so that the corresponding single side of the metal mesh belt conveyor surface completes the preset number of liftings; when the abnormality detected by the visual inspection module corresponds to the unilateral deviation of the metal mesh belt, the execution module drives the end portion of the adjusting roller corresponding to the deviation side to perform at least one oblique lifting action according to the control signal sent by the control module until the visual inspection module stops sending the corresponding abnormality signal; the visual inspection module is used to simultaneously detect whether the mesh belt furnace has two abnormalities, namely, the unilateral accumulation of fasteners or the unilateral deviation of the metal mesh belt, and the above two abnormalities can be eliminated simultaneously by only using the adjusting roller to perform the specified oblique lifting action; When, in the abnormal situation, the fasteners gather on one side and the metal mesh belt deflects on one side on the same side, the execution module drives the adjusting roller to perform an oblique lifting action at the end corresponding to the same side to simultaneously eliminate the abnormalities of the fasteners gathering on one side and the metal mesh belt deflecting on one side; when, in the abnormal situation, the fasteners gather on one side and the metal mesh belt deflects on one side on the other side, the execution module preferentially drives the adjusting roller to perform an oblique lifting action at the end corresponding to the side to eliminate the abnormality of the fasteners gathering on one side, and then drives the adjusting roller to perform an oblique lifting action at the end corresponding to the other side to eliminate the abnormality of the metal mesh belt deflecting on one side.

2. The mesh belt furnace for heat treatment of high-strength fasteners according to claim 1, characterized in that: If the distribution number or coverage area of ​​fasteners on one half of the metal mesh belt in the real-time image captured by the visual inspection module exceeds the distribution number or coverage area on the other half by a preset value, then the abnormal situation corresponds to unilateral aggregation of fasteners; and / or, if the edge of one side of the mesh belt in the real-time image captured by the visual inspection module exceeds the preset limit position of the corresponding side of the mesh belt, then the abnormal situation corresponds to unilateral offset of the metal mesh belt.

3. The mesh belt furnace for heat treatment of high-strength fasteners according to claim 1, characterized in that: The execution module includes two propulsion devices respectively movably connected to the two ends of the adjusting roller, and the propulsion device includes a push rod and a connecting head. The extension direction of the push rod points to above the conveying surface of the metal mesh belt in the horizontal state and away from the heat treatment chamber. The connecting head is installed at the end of the push rod close to the adjusting roller, and a connecting hole is provided in the connecting head. The two limiting roller ends of the adjusting roller are both provided with connecting parts on the outside, and the connecting holes can be movably mounted on the connecting parts and accommodate the connecting parts to perform angular tilting and position movement within a set range therein; when the propulsion device on one side drives the corresponding end of the adjusting roller to perform an oblique lifting action, its push rod extends, and the connecting head drives the connecting part inside it to be obliquely lifted, thereby causing the corresponding end of the adjusting roller to be obliquely lifted, while the propulsion device on the other side remains stationary, and the position of the other end of the corresponding adjusting roller also remains stationary.

4. The mesh belt furnace for heat treatment of high-strength fasteners according to claim 3, characterized in that: The included angle between the extending direction of the push rod and the horizontal plane is in the range of 30°-60°.

5. The mesh belt furnace for heat treatment of high-strength fasteners according to claim 1, characterized in that: A material distributor is provided at the feed inlet at the front end of the heat treatment chamber. The material distributor is arranged parallel to the metal mesh belt. The material distributor includes a material distributor shaft and a material distributor blade installed on the material distributor shaft. The material distributor blade rotates with the material distributor and pushes the fasteners on the metal mesh belt away and flattens them.

6. The mesh belt furnace for heat treatment of high-strength fasteners according to claim 1, characterized in that: The metal mesh belt is provided with movable side panels on both sides of the feed section located at the front end of the heat treatment chamber. The movable side panels include elastic elements and baffles. The elastic elements are installed on the frames on both sides of the metal mesh belt and extend and retract in the direction of approaching / moving away from the center of the metal mesh belt. The back of the baffle is connected to the end of the elastic element. The baffle is located above the inner side of the edge of the metal mesh belt. The height of the gap between the bottom end of the baffle and the metal mesh belt is so small that a single fastener on the metal mesh belt cannot fall into the gap.

7. The mesh belt furnace for heat treatment of high-strength fasteners according to claim 6, characterized in that: The baffle includes a first vertical plate, a transverse plate, and a second vertical plate. The first vertical plate is located above the inner side of the edge of the metal mesh belt. One end of the transverse plate is connected to the bottom end of the first vertical plate and the other end is connected to the top end of the second vertical plate. The second vertical plate is located outside the edge of the metal mesh belt and its bottom end extends to the bottom of the metal mesh belt.

8. The mesh belt furnace for heat treatment of high-strength fasteners according to claim 1, characterized in that: A marking line parallel to the edge of the metal mesh belt is provided in the middle of the metal mesh belt, and the marking line is used to assist the visual inspection module in quickly detecting material distribution information on the metal mesh belt.

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