Positioning mechanism and rolling forming machine

Abstract

The positioning mechanism comprises a fixed seat and a movable rod, a containing cavity is formed in the fixed seat, a movable groove is formed in the containing cavity in the first direction, and the first end of the movable rod penetrates through the movable groove and is arranged in the containing cavity; a first adjusting gap and a second adjusting gap are formed between the two opposite sides, in the first direction, of the containing cavity and the first end, the first adjusting gap and the second adjusting gap gradually contract or expand at least in the direction perpendicular to the first direction, and a first adjusting block is suitable for being arranged in the first adjusting gap. A first adjusting block is suitable for being arranged in the first adjusting gap, a second adjusting block is suitable for being arranged in the second adjusting gap, the first adjusting block and the second adjusting block are suitable for being matched to limit movement of the first end, and the first adjusting block and the second adjusting block are suitable for being matched to move to different positions in the first adjusting gap and the second adjusting gap correspondingly so that the first end can move along the movable groove; the device has the advantages of being high in adjusting precision and capable of stably working for a long time under the medium-low load working condition.

Description

Technical Field

[0001] The present application relates to the technical field of roll forming equipment, and in particular to a positioning mechanism and a roll forming machine. Background Art

[0002] Rolling processing is to apply a certain pressure to the surface of the workpiece through a certain form of rolling tool, and use the plastic deformation of the metal at room temperature to achieve the purpose of workpiece finishing and strengthening. Among the process parameters of rolling processing, the appropriate rolling pressure is the key factor that determines the quality of rolling. Therefore, during the rolling process, it is necessary not only to accurately control the size of the rolling pressure, but also to ensure that the rolling pressure does not fluctuate over a large range. The adjustment method of the rolling tool usually affects the processing accuracy and stability of the rolling process.

[0003] However, the existing rolling tool adjustment methods have the following defects: the most common rolling tool adjustment methods include hand-pushing and threaded fixing, but the hand-pushing movement has low accuracy and requires repeated adjustment. Threaded fixing will cause offset due to vibration and other reasons. This offset is mostly a slight offset and will cause unstable equipment operation, ultimately leading to dimensional instability of the processed product. There is also a method of screw movement and threaded tightening. Although this method solves the problem of movement accuracy, all the force is concentrated on the screw thread. Vibration and other reasons during long-term use will cause the screw thread to wear, ultimately leading to instability and abnormality in the equipment, resulting in unstable product size. Summary of the invention

[0004] One object of the present application is to provide a positioning mechanism and a roll forming machine with high adjustment accuracy and strong use stability.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: a positioning mechanism, including a fixed seat and a movable rod, the fixed seat is provided with a accommodating cavity, the accommodating cavity is provided with a movable groove along a first direction, the first end of the movable rod passes through the movable groove and is placed in the accommodating cavity, and a first adjustment gap and a second adjustment gap are formed between the two opposite sides of the accommodating cavity along the first direction and the first end, the first adjustment gap and the second adjustment gap gradually shrink or expand at least in a direction perpendicular to the first direction, the first adjustment gap is suitable for being provided with a first adjustment block, and the second adjustment gap is suitable for being provided with a second adjustment block, the first adjustment block and the second adjustment block are suitable for cooperating to limit the movement of the first end, and the first adjustment block and the second adjustment block are suitable for cooperating to move to different positions in the first adjustment gap and the second adjustment gap respectively, so that the first end moves along the movable groove.

[0006] In some embodiments, a first guide surface is provided on one side of the accommodating cavity within the first adjustment gap, and the first adjustment block and the first guide surface are slidably matched; and / or a second guide surface is provided on one side of the accommodating cavity within the second adjustment gap, and the second adjustment block and the second guide surface are slidably matched.

[0007] In some embodiments, the first guide surface is arranged along the second direction, and the angle between the first direction and the second direction is α, 83°≤α<90°; and / or, the second guide surface is arranged along the third direction, and the angle between the first direction and the third direction is β, 83°≤β<90°.

[0008] In some embodiments, the first guide surface and the second guide surface are parallel to each other.

[0009] In some embodiments, the first adjustment block and the second adjustment block are integrally connected.

[0010] In some embodiments, an adjuster is also included, and the adjuster enters the accommodating cavity from both sides of the accommodating cavity along a direction perpendicular to the first direction through the fixing seat, and the adjuster is suitable for snap-fitting with the first adjusting block, and the adjuster is suitable for adjusting the length entering the accommodating cavity so that the first adjusting block moves within the first adjusting gap, and the adjuster is suitable for snap-fitting with the second adjusting block, and the adjuster is suitable for adjusting the length entering the accommodating cavity so that the second adjusting block moves within the second adjusting gap.

[0011] In some embodiments, a first channel is provided on the first adjustment block, the adjuster is suitable for passing through the first channel, and the width of the first channel in the first direction is greater than the width of the adjuster in the first channel; and / or, a second channel is provided on the second adjustment block, the adjuster is suitable for passing through the second channel, and the width of the second channel in the first direction is greater than the width of the adjuster in the second channel.

[0012] In some embodiments, the adjuster and the fixed seat are threadedly connected; a first locking member is provided between the adjuster and the fixed seat, and the first locking member is suitable for cooperating with the threaded connection between the adjuster and the fixed seat to limit the relative movement between the adjuster and the fixed seat; a second locking member is provided on the first adjusting block and the second adjusting block, and the second locking member is suitable for abutting against the fixed seat or the movable rod to limit the relative movement between the first adjusting block and the second adjusting block and the fixed seat; a driving device is provided on the fixed seat, and the driving device is connected to the adjuster, and the driving device is suitable for driving the adjuster to enter the length of the accommodating cavity.

[0013] In some embodiments, a first limiting portion is provided on the first adjustment block, and the first limiting portion is suitable for limiting the movement of the first end on the side of the first end away from the movable groove; a second limiting portion is provided on the second adjustment block, and the second limiting portion is suitable for limiting the movement of the first end on the side of the first end away from the movable groove.

[0014] A roll forming machine comprises any one of the above-mentioned positioning mechanisms, wherein the movable rod is provided with a roll forming accessory.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] 1. The positioning mechanism of the present application changes and positions the position of the locking movable rod by setting the first adjusting block and the second adjusting block and controlling their movement by the adjuster. Compared with manual adjustment, it can have higher adjustment accuracy. At the same time, the first adjusting block and the second adjusting block can obtain higher stability through a contact positioning locking method that is different from traditional screw locking and thread tightening, effectively disperse the force, reduce the contact wear between them and the adjuster and the movable rod, improve the stability of the equipment, thereby improving the quality of the product and the product rate. After the above optimization, the time required for adjustment of the positioning mechanism is shorter, the adjustment efficiency is high, and the production efficiency can be improved.

[0017] 2. The positioning mechanism of the present application can be designed and selected with different installation, connection and positioning methods according to actual conditions, so as to reduce the probability of structural interference between components, thereby reducing the difficulty of operation. In addition, the positioning mechanism has high scalability and can realize automatic operation by setting motor drive control and combining sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall structural view according to a preferred embodiment of the present application.

[0019] Figure 2 It is a schematic diagram of the state of the movable rod before moving according to a preferred embodiment of the present application.

[0020] Figure 3 It is a schematic diagram of the state after the movable rod moves according to a preferred embodiment of the present application.

[0021] Figure 4 It is a structural schematic diagram of a first guide surface and a second guide surface when they are symmetrically arranged according to a preferred embodiment of the present application.

[0022] Figure 5 It is a structural schematic diagram when the first guide surface and the second guide surface are asymmetrically arranged according to a preferred embodiment of the present application.

[0023] Figure 6It is a structural schematic diagram of setting a first locking member according to a preferred embodiment of the present application.

[0024] Figure 7 It is a structural schematic diagram of setting a second locking member according to a preferred embodiment of the present application.

[0025] Figure 8 It is a longitudinal sectional view according to a preferred embodiment of the present application.

[0026] Fig. 9 It is a schematic diagram of installation on a roll forming machine according to a preferred embodiment of the present application.

[0027] In the figure: 1. fixed seat; 11. accommodating cavity; 111. movable groove; 112. first adjustment gap; 1121. first guide surface; 113. second adjustment gap; 1131. second guide surface; 12. through hole; 2. movable rod; 21. first end; 22. second end; 3. first adjustment block; 31. first channel; 32. first limiting part; 4. second adjustment block; 41. second channel; 42. second limiting part; 5. adjuster; 51. clamping part; 6. first locking member; 7. second locking member; 8. hook and roll. DETAILED DESCRIPTION

[0028] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application 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, and cannot be understood as limiting the specific scope of protection of the present application.

[0030] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0031] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0032] The present application is further described below with reference to the accompanying drawings:

[0033] like Figures 1 to 9 As shown, the present application provides a positioning mechanism, including a fixed seat 1 and a movable rod 2. The fixed seat 1 is provided with a receiving cavity 11, and a movable groove 111 is provided in the receiving cavity 11 along a first direction. The first end 21 of the movable rod 2 passes through the movable groove 111 and is placed in the receiving cavity 11.

[0034] A first adjustment gap 112 and a second adjustment gap 113 are formed between the two sides of the accommodating cavity 11 opposite to each other along the first direction and the first end 21. The first adjustment gap 112 and the second adjustment gap 113 gradually shrink or expand at least in a direction perpendicular to the first direction. The first adjustment gap 112 is suitable for being provided with a first adjustment block 3, and the second adjustment gap 113 is suitable for being provided with a second adjustment block 4. The first adjustment block 3 and the second adjustment block 4 are suitable for cooperating to limit the movement of the first end 21 so that the first end 21 is fixed at the current position to achieve stability when the movable rod 2 is stationary.

[0035] Specifically, the first adjustment block 3 and the second adjustment block 4 fix the first end 21 in the accommodating cavity 11 by means of interlocking fixation, limiting the first end 21 to move along the movable groove 111 , which can also be understood as limiting the first end 21 to move along the first direction.

[0036] The setting of the first direction is usually configured to at least enable the second end 22 of the movable rod 2 to move relative to the product to be processed on the roll-forming machine. For example, the first direction can be set to enable the second end 22 of the movable rod 2 to approach or move away from the surface of the product to be processed on the roll-forming machine, so that the second end 22 of the movable rod 2 can apply different pressures to the surface of the product to be processed, thereby performing roll-forming.

[0037] The first adjustment block 3 and the second adjustment block 4 are suitable for respectively cooperating and moving to different positions in the first adjustment gap 112 and the second adjustment gap 113, so that the first end 21 moves along the movable groove 111, which can be understood as moving the first end 21 along the first direction. The first adjustment block 3 and the second adjustment block 4 can make the first adjustment block 3 and the second adjustment block 4 after the position change adaptively cooperate according to the different positions in the first adjustment gap 112 and the second adjustment gap 113, thereby driving the position of the first end 21 in the first direction to change until the first adjustment block 3, the second adjustment block 4 and the first end 21 are tightened and matched again, and the final result is that the first end 21 can move along the movable groove 111.

[0038] In some embodiments, one accommodating cavity 11 is correspondingly provided with one movable rod 2 , and one or more accommodating cavities 11 may be provided on the fixing seat 1 according to actual production and processing requirements.

[0039] like Figure 2 In the illustrated embodiment, a first guide surface 1121 is provided on one side of the accommodating cavity 11 within the first adjustment gap 112, and the first adjustment block 3 and the first guide surface 1121 are slidably matched. The first adjustment block 3 can slide along the first guide surface 1121, thereby changing the position of the first adjustment block 3 within the first adjustment gap 112, so that the matching position of the first adjustment block 3 with the first end 21 in the first direction changes, thereby allowing the first end 21 to move adaptively following the change.

[0040] like Figure 2 In the illustrated embodiment, the first guide surface 1121 is arranged along the second direction, and the angle between the first direction and the second direction is α, 83°≤α<90°. At this angle, the first adjustment block 3 can achieve a certain self-locking characteristic when the external limiting force decreases, thereby extending the stability period of the equipment movement.

[0041] It can be understood that, since the first adjusting block 3 and the first guide surface 1121 are in sliding cooperation, the angle α is also the angle between the first adjusting block 3 at its sliding contact side and the first direction.

[0042] like Figure 2 In the illustrated embodiment, a second guide surface 1131 is provided on one side of the accommodating cavity 11 within the second adjustment gap 113, and the second adjustment block 4 is slidably matched with the second guide surface 1131. The second adjustment block 4 can slide along the second guide surface 1131, thereby changing the position of the second adjustment block 4 within the second adjustment gap 113, so that the matching position of the second adjustment block 4 with the first end 21 in the first direction changes, thereby allowing the first end 21 to adaptively move following the change.

[0043] like Figure 2 In the illustrated embodiment, the second guide surface 1131 is arranged along the third direction, and the angle between the first direction and the third direction is β, 83°≤β<90°. At this angle, the second adjustment block 4 can achieve a certain self-locking characteristic when the external limiting force decreases, thereby extending the stability period of the equipment movement.

[0044] It can be understood that, since the second adjustment block 4 and the second guide surface 1131 are in sliding cooperation, the angle β is also the angle between the second adjustment block 4 at its sliding contact side and the first direction.

[0045] In some embodiments, the first adjustment block 3 contacts the first guide surface 1121, and the second adjustment block 4 contacts the second guide surface 1131. In order to reduce friction and make sliding smoother, ordinary steel or hardened steel can be used, and beryllium bronze is more preferably selected.

[0046] In some embodiments, a low friction coefficient material may be provided between the first adjustment block 3 and the first guide surface 1121 , or between the first adjustment block 3 and the first end 21 , to further improve the sliding smoothness.

[0047] like Figure 2 and 3 In the illustrated embodiment, the first guide surface 1121 and the second guide surface 1131 are parallel to each other. In this case, the first adjustment block 3 and the second adjustment block 4 can be symmetrically arranged along the center of the accommodating groove, and the first adjustment block 3 and the second adjustment block 4 and related accessories can be designed to have the same structure to increase versatility and reduce costs.

[0048] In some embodiments, when the first guide surface 1121 and the second guide surface 1131 are parallel to each other, by integrally connecting the first adjustment block 3 and the second adjustment block 4, the use of parts can be reduced. During adjustment, only the first adjustment block 3 or the second adjustment block 4 needs to be adjusted to drive the other to move synchronously, thereby simplifying the operation and improving the adjustment efficiency.

[0049] like Figure 4 In the illustrated embodiment, the first guide surface 1121 and the second guide surface 1131 are symmetrically arranged, so that the operating sides of the first adjustment block 3 and the second adjustment block 4 can be adjusted to the same side of the fixing seat 1, thereby improving the adjustment convenience.

[0050] like Figure 5In the embodiment shown, the angle α and the angle β can be set to be different, and the first end 21 can still be adjusted by changing the position of the first adjustment block 3 and the second adjustment block 4. It can be understood that if the limiting forces generated by the first adjustment block 3 and the second adjustment block 4 on the first end 21 are different, this solution can also be used. It can be understood that a larger angle can obtain better self-locking characteristics.

[0051] like Figures 1 to 3 In the illustrated embodiment, the positioning mechanism further includes an adjuster 5, which passes through the fixing seat 1 from both sides of the accommodating cavity 11 along a direction perpendicular to the first direction and enters the accommodating cavity 11. The adjuster 5 is suitable for snap-fitting with the first adjusting block 3. The adjuster 5 is suitable for adjusting the length entering the accommodating cavity 11 so that the first adjusting block 3 moves within the first adjusting gap 112. The adjuster 5 is suitable for snap-fitting with the second adjusting block 4. The adjuster 5 is suitable for adjusting the length entering the accommodating cavity 11 so that the second adjusting block 4 moves within the second adjusting gap 113.

[0052] In some embodiments, the adjuster 5 can achieve the compressive adaptive movement of the first end 21 by moving the first adjustment block 3 to the narrower side of the first adjustment gap 112 and releasing the clamping of the second adjustment block 4, and vice versa.

[0053] like Figure 8 In the illustrated embodiment, a first channel 31 is provided on the first adjustment block 3, and the adjuster 5 is suitable for passing through the first channel 31. The width of the first channel 31 in the first direction is greater than the width of the adjuster 5 in the first channel 31. The first channel 31 can reduce the structural interference between the adjuster 5 and the first adjustment block 3, thereby ensuring the smooth movement of the first adjustment block 3.

[0054] like Figure 8 In the illustrated embodiment, a second channel 41 is provided on the second adjustment block 4, and the adjuster 5 is suitable for passing through the second channel 41. The width of the second channel 41 in the first direction is greater than the width of the adjuster 5 in the second channel 41. The second channel 41 can reduce the structural interference between the adjuster 5 and the second adjustment block 4, thereby ensuring the smooth movement of the second adjustment block 4.

[0055] In some embodiments, the first channel 31 and the second channel 41 may be waist-shaped holes or round holes, and their sizes are sufficient as long as they can be sized to avoid interference from the adjuster 5 when the first adjustment block 3 and the second adjustment block 4 slide.

[0056] In some embodiments, the number of regulators 5 is the sum of the number of first regulating blocks 3 and second regulating blocks 4 , the first regulating blocks 3 and the corresponding number of regulators 5 are connected one-to-one, and the second regulating blocks 4 and the corresponding number of regulators 5 are connected one-to-one.

[0057] In some embodiments, when the first regulating block 3 and the second regulating block 4 are connected as one body, the number of regulators 5 is the same as the number of first regulating blocks 3 , and the regulator 5 is connected to one of the connected first regulating blocks 3 and second regulating blocks 4 .

[0058] In some embodiments, the adjuster 5 and the fixing seat 1 are connected by threads, and the length of the adjuster 5 entering the accommodating cavity 11 is limited by the threads, which has a simple structure and is easy to install.

[0059] like Figure 1 In the illustrated embodiment, a snap-fitting portion 51 is provided at the top of the regulator 5, and the width of the snap-fitting portion 51 is greater than the widths of the first channel 31 and the second channel 41, thereby achieving snap-fitting. To facilitate the installation of the regulator 5, a through hole 12 may be opened on the fixing seat 1, and the diameter of the through hole 12 is not less than the width of the snap-fitting portion 51.

[0060] In some embodiments, the adjuster 5 is a bolt, and the clamping portion 51 is the cup head portion of the bolt.

[0061] like Figure 6 In the illustrated embodiment, a first locking member 6 is provided between the adjuster 5 and the fixing seat 1. The first locking member 6 is suitable for cooperating with the threaded connection between the adjuster 5 and the fixing seat 1 to limit the relative movement between the adjuster 5 and the fixing seat 1. By extending the thread of the adjuster 5 to the outside of the fixing seat 1, the first locking member 6 is installed to limit the length of the adjuster 5 entering the accommodating cavity 11 from the outside of the fixing seat 1. Since the thread may wear under long-term stress, resulting in poor stability of the adjuster 5, this solution can further improve the stability of the adjuster 5, thereby improving the overall long-term use stability.

[0062] In some embodiments, the first locking member 6 is preferably a nut.

[0063] In some embodiments, a second locking member 7 is provided on the first adjusting block 3 and the second adjusting block 4 , and the second locking member 7 is suitable for abutting against the fixed seat 1 or the movable rod 2 to limit the relative movement between the first adjusting block 3 and the second adjusting block 4 and the fixed seat 1 .

[0064] In some embodiments, the second locking member 7 is preferably a bolt or a screw, and is locked by threaded tightening.

[0065] In some embodiments, a driving device is provided on the fixing seat 1, and the driving device is connected to the adjuster 5. The driving device is suitable for driving the adjuster 5 to enter the length of the accommodating cavity 11. By controlling a driving device such as a motor and combining components such as a position sensor, automated operation can be achieved, thereby further improving operating efficiency and reducing operating difficulty.

[0066] like Figure 8In the illustrated embodiment, a first limiting portion 32 is provided on the first adjustment block 3, and the first limiting portion 32 is suitable for limiting the movement of the first end 21 on the side of the first end 21 away from the movable groove 111. In the present application, in order to facilitate the installation of various components, the accommodating cavity 11 is opened on the side away from the movable groove 111. By providing the first limiting portion 32, the second adjustment block 4 can be effectively prevented from being separated from the first end 21, thereby improving the structural stability.

[0067] like Figure 8 In the illustrated embodiment, a second limiting portion 42 is provided on the second adjustment block 4, and the second limiting portion 42 is suitable for limiting the movement of the first end 21 on the side of the first end 21 away from the movable groove 111. In the present application, in order to facilitate the installation of various components, the accommodating cavity 11 is opened on the side away from the movable groove 111. By providing the second limiting portion 42, the second adjustment block 4 can be effectively prevented from being separated from the first end 21, thereby improving the structural stability.

[0068] like Figure 7 In the illustrated embodiment, the second locking member 7 may be disposed on the first limiting portion 32 of the first adjusting block 3 and the second limiting portion 42 of the second adjusting block 4 to achieve tightening.

[0069] like Fig. 9 As shown, the present application provides a roll forming machine, including a positioning mechanism of any of the above-mentioned embodiments, and a roll forming accessory is arranged on the movable rod 2. The roll forming accessories include various roll forming tools including a hook roller 8, which can be selected and installed according to actual conditions.

[0070] like Figure 8 In the illustrated embodiment, when the roll-formed accessory is a hook roller 8, the hook roller 8 can be installed at the second end 22 of the movable rod 2, the hook roller 8 is connected to the movable rod 2 by screws, a bearing is installed at the top of the hook roller 8, and screws and gaskets are provided for locking the bearing to prevent the bearing from loosening from the end of the hook roller 8.

[0071] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A positioning mechanism, characterized in that: The invention comprises a fixed seat and a movable rod, wherein a accommodating cavity is provided on the fixed seat, a movable groove is provided in the accommodating cavity along a first direction, a first end of the movable rod passes through the movable groove and is placed in the accommodating cavity, a first adjustment gap and a second adjustment gap are formed between the two opposite sides of the accommodating cavity along the first direction and the first end, the first adjustment gap and the second adjustment gap gradually shrink or expand at least in a direction perpendicular to the first direction, a first adjustment block is suitable for being provided in the first adjustment gap, and a second adjustment block is suitable for being provided in the second adjustment gap, the first adjustment block and the second adjustment block are suitable for cooperating to limit the movement of the first end, the first adjustment block and the second adjustment block are suitable for cooperating to move to different positions in the first adjustment gap and the second adjustment gap respectively, so that the first end moves along the movable groove.

2. A positioning mechanism according to claim 1, characterized in that: A first guide surface is provided on one side of the accommodating cavity within the first adjustment gap, and the first adjustment block and the first guide surface are slidably matched; and / or a second guide surface is provided on one side of the accommodating cavity within the second adjustment gap, and the second adjustment block and the second guide surface are slidably matched.

3. A positioning mechanism according to claim 2, characterized in that: The first guide surface is arranged along the second direction, and the angle between the first direction and the second direction is α, 83°≤α<90°; and / or, the second guide surface is arranged along the third direction, and the angle between the first direction and the third direction is β, 83°≤β<90°.

4. A positioning mechanism according to claim 2, characterized in that: The first guide surface and the second guide surface are parallel to each other.

5. A positioning mechanism according to claim 1 or 4, characterized in that: The first adjusting block and the second adjusting block are integrally connected.

6. A positioning mechanism according to claim 1, characterized in that: It also includes an adjuster, which enters the accommodating cavity from both sides of the accommodating cavity along a direction perpendicular to the first direction through the fixing seat, and the adjuster is suitable for snap-fitting with the first adjusting block, and the adjuster is suitable for adjusting the length entering the accommodating cavity so that the first adjusting block moves within the first adjusting gap, and the adjuster is suitable for snap-fitting with the second adjusting block, and the adjuster is suitable for adjusting the length entering the accommodating cavity so that the second adjusting block moves within the second adjusting gap.

7. A positioning mechanism according to claim 6, characterized in that: A first channel is formed on the first adjusting block, the adjuster is suitable for passing through the first channel, and the width of the first channel in the first direction is greater than the width of the adjuster in the first channel; And / or, a second channel is opened on the second adjustment block, the adjuster is suitable for passing through the second channel, and the width of the second channel in the first direction is greater than the width of the adjuster in the second channel.

8. A positioning mechanism according to claim 6, characterized in that: The adjuster and the fixing seat are threadedly connected; a first locking piece is provided between the adjuster and the fixing seat, and the first locking piece is suitable for cooperating with the threaded connection between the adjuster and the fixing seat to limit the relative movement between the adjuster and the fixing seat; a second locking piece is provided on the first adjusting block and the second adjusting block, and the second locking piece is suitable for abutting against the fixing seat or the movable rod to limit the relative movement between the first adjusting block and the second adjusting block and the fixing seat; a driving device is provided on the fixing seat, and the driving device is connected to the adjuster, and the driving device is suitable for driving the adjuster to enter the length of the accommodating cavity.

9. A positioning mechanism according to claim 1, characterized in that: The first adjusting block is provided with a first limiting portion, which is suitable for limiting the movement of the first end on the side of the first end away from the movable groove; the second adjusting block is provided with a second limiting portion, which is suitable for limiting the movement of the first end on the side of the first end away from the movable groove.

10. A roll forming machine, characterized in that: It comprises the positioning mechanism as claimed in any one of claims 1 to 9, wherein the movable rod is provided with a roll-formed accessory.

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