A steel mesh guide rail adjusting device of a tin paste printing machine

Abstract

The utility model discloses a kind of steel mesh guide rail adjusting devices of solder paste printing machine, and printing machine includes two opposite and interval arrangement steel mesh guide rails, connecting hole is opened on any steel mesh guide rail, adjusting device includes mounting bracket, adjusting mechanism and locking mechanism.Mounting bracket is located at the bottom of two steel mesh guide rails and is fixedly connected with machine body;Adjusting mechanism includes adjusting component, positioning camera and driving component, adjusting component is slidably connected with mounting bracket, positioning camera is connected with adjusting component and mounting bracket and is driven relative to mounting bracket synchronous sliding, driving component is arranged on mounting bracket and driving end is connected with adjusting component and positioning camera;Locking mechanism is arranged between machine body and two steel mesh guide rails, in the locking state, connecting steel mesh guide rail and machine body and in the unlocking state, release the connection of steel mesh guide rail and machine body.It can realize automatic adjustment steel mesh guide rail, without manual adjustment, adjustment is simple and accurate, and efficiency is high.Structure is simple and practicality is stronger.

Description

Technical Field

[0001] This utility model relates to the field of SMT technology, specifically to a stencil guide rail adjustment device for a solder paste printer. Background Technology

[0002] SMT is short for Surface Mount Technology, also known as Surface Mount Technology or Surface Mount Technology. A pick-and-place machine, also known as a placement machine or surface mount system, is a device that is placed on the PCB pads by moving the placement head after the dispensing machine or screen printer in the production line.

[0003] Solder paste printing is a crucial step in the SMT production line, directly determining the quality of the SMT process. The solder paste printer is a key piece of equipment in the Surface Mount Technology (SMT) production line for printed circuit board manufacturing. During production, model switching is required, and the width of the stencil guide rail may not match the width of the stencil. The conventional approach in existing technology is to open the machine cover, manually release the stencil guide rail, manually adjust it to the new position based on experience, and then manually fix it back in place. Before positioning the stencil onto the guide rail, a positioning camera is needed to confirm its correct position; if inaccurate, manual adjustment is required again. Therefore, the existing stencil guide rail adjustment method is time-consuming, labor-intensive, and inaccurate, requiring multiple adjustments, which is cumbersome and leads to project losses and low efficiency. This invention addresses this issue. Utility Model Content

[0004] In view of at least one of the above-mentioned technical problems, the purpose of this utility model is to provide a stencil guide rail adjustment device for solder paste printing machine, which automatically adjusts the stencil guide rail without manual adjustment, and the adjustment is simple, accurate and efficient.

[0005] The technical solution of this utility model is:

[0006] The purpose of this utility model is to provide a stencil guide rail adjustment device for a solder paste printing machine. The solder paste printing machine includes a machine body and two stencil guide rails disposed on opposite sides and spaced apart along the stencil conveying direction within the machine body. Each stencil guide rail has a locked state to be fixed relative to the machine body or an unlocked state to move towards or away from the other stencil guide rail relative to the machine body, and is in a locked state during stencil conveying. Each stencil guide rail has a connecting hole. The adjustment device includes:

[0007] The mounting bracket is located at the bottom of the two steel mesh guide rails and is fixedly connected to the body, and the mounting bracket extends along the moving direction of the steel mesh guide rails in the unlocked state.

[0008] An adjustment mechanism includes an adjustment component, a positioning camera, and a drive component. The adjustment component is slidably connected to the mounting bracket and has a docking state that is connected to the connection hole and a disengaged state that is separated from the connection hole. The positioning camera is connected to the mounting bracket together with the adjustment component and is driven to slide synchronously relative to the mounting bracket. The drive component is disposed on the mounting bracket and its drive end is connected to the adjustment component and the positioning camera to drive the adjustment component and the positioning camera to move along the sliding direction of the adjustment mechanism.

[0009] A locking mechanism is provided between the body and the two steel mesh guide rails, which connects the steel mesh guide rails to the body in the locked state and releases the connection between the steel mesh guide rails and the body in the unlocked state.

[0010] Preferably, the driving component includes:

[0011] A drive motor is mounted on the mounting bracket;

[0012] A drive rod is mounted on the mounting bracket and connected to the drive end of the drive motor and extends along the extension direction of the mounting bracket. The drive rod is driven by the drive motor to rotate horizontally about its axis.

[0013] A drive slider is slidably connected to the drive rod, and the adjustment component and the positioning camera are both mounted on the drive slider.

[0014] Preferably, the driving component further includes a guide rail extending along the extension direction of the mounting bracket on the outer side of the mounting bracket, one end of the driving slider being slidably connected to the driving rod and the other end being slidably connected to the guide rail.

[0015] Preferably, the adjusting component includes:

[0016] A docking drive component is mounted on a fixed frame fixed to the drive slider, with the drive end facing vertically upward.

[0017] A docking rod is vertically disposed at the driving end of the docking drive member and is driven by the docking drive member to move vertically up and down.

[0018] Preferably, the docking drive component is a cylinder.

[0019] Preferably, the locking mechanism further includes a second locking mechanism disposed at the other end of the two steel mesh guide rails, the second locking mechanism comprising:

[0020] A fixed guide rod is fixedly connected to the machine body at both ends, and its axis is parallel to the moving direction of the steel mesh guide rail in the unlocked state.

[0021] Two second locking components are respectively disposed at one corresponding end of the two steel mesh guide rails, and each second locking component includes a second mounting plate that is vertically disposed and fixed to the corresponding steel mesh guide rail, a slide block that is slidably sleeved and connected to the fixed guide rod on one side of the second mounting plate, and a second locking component that is disposed on the other side of the second mounting plate and can extend or retract toward or away from the second mounting plate.

[0022] The second fixing frame is fixed to the body and is opposite to the second locking component of the two second locking assemblies. The second fixing frame extends along the moving direction of the steel mesh guide rail in the unlocked state and has a plurality of second locking holes on the side facing the corresponding second locking component. The plurality of second locking holes are spaced apart along the extending direction of the second fixing frame.

[0023] In the locked state, any of the second locking components engages with its corresponding second locking hole.

[0024] Preferably, the locking mechanism further includes a first locking mechanism disposed at one end of the two steel mesh guide rails, the first locking mechanism comprising:

[0025] Two first locking components are respectively disposed at one end of the two steel mesh guide rails, and each first locking component includes a first mounting plate that is vertically arranged and fixed to the corresponding steel mesh guide rail, a first fixing frame that is slidably connected to one side of the first mounting plate and fixedly connected to the body along the moving direction of the steel mesh guide rail in the unlocked state, and a first locking component disposed on the other side of the first mounting plate and that can extend or retract toward or away from the first fixing frame.

[0026] Each of the first fixing frames extends along the moving direction of the steel mesh guide rail in the unlocked state and has a plurality of first locking holes on the side facing the corresponding first locking component. The plurality of first locking holes are spaced apart along the extending direction of the first fixing frame.

[0027] In the locked state, each of the first locking components is engaged with its corresponding first lock hole.

[0028] Preferably, both the first locking component and the second locking component are cylinders.

[0029] Preferably, the two first locking components are connected by a proportional valve, and the two second locking components are connected by a proportional valve.

[0030] Preferably, each of the first mounting brackets has a transverse guide rail extending along its extension direction on the side facing its corresponding first mounting plate, and each of the first mounting plates has a transverse slider that slides with the transverse guide rail on the side facing its corresponding first mounting bracket.

[0031] Compared with the prior art, the advantages of this utility model are:

[0032] This utility model discloses a stencil guide rail adjustment device for a solder paste printing machine. It enables automatic adjustment of the stencil guide rail, eliminating the need for manual adjustment. The adjustment is simple, accurate, and highly efficient. It features a simple structure and strong practicality. Attached Figure Description

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0034] Figure 1 The structural diagram of the stencil guide rail adjustment device for the solder paste printing machine in this embodiment of the utility model is omitted.

[0035] Figure 2 for Figure 1 A partially enlarged structural diagram of section A in the middle;

[0036] Figure 3 This is a schematic diagram of the mounting frame and adjustment mechanism of the stencil guide rail adjustment device for a solder paste printing machine according to an embodiment of the present invention;

[0037] Figure 4 for Figure 3 A schematic diagram of the enlarged structure in section B;

[0038] Figure 5 This is a schematic diagram of the structure of one of the stencil guide rails and the first locking mechanism in the stencil guide rail adjustment device for a solder paste printer according to an embodiment of the present invention.

[0039] Figure 6 for Figure 5 A magnified schematic diagram of a portion of the C section.

[0040] Wherein: 100, steel mesh guide rail; 110, connecting hole; 10, mounting bracket; 20, adjustment mechanism; 21, adjustment component; 211, docking drive component; 212, docking rod; 22, positioning camera; 23, drive component; 231, drive motor; 232, drive rod; 233, drive slider; 234, guide rail; 30, locking mechanism; 31, second locking mechanism; 311, fixed guide rod; 312, second locking assembly; 3121, second mounting plate; 3122, slide block; 3123, second locking component; 313, second fixed bracket; 314, second lock hole; 32, first locking mechanism; 321, first locking assembly; 3211, first mounting plate; 3212, first fixed bracket; 3213, first locking component; 3214, first lock hole; 3215, transverse guide rail; 3216, transverse slider. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0042] See Figures 1 to 6This utility model discloses a stencil guide rail adjustment device for a solder paste printing machine. The solder paste printing machine includes a machine body (not shown) and two stencil guide rails 100 disposed within the machine body, positioned opposite each other and spaced apart along the stencil conveying direction. Each stencil guide rail 100 has a locked state and an unlocked state. In the locked state, the stencil guide rail 100 is fixed relative to the machine body. In the unlocked state, the stencil guide rail 100 can move relative to the machine body closer to or further away from the other stencil guide rail 100. Obviously, the stencil guide rail 100 is in a fixed state during stencil conveying. Because existing technologies involve manual unlocking or locking, and manual adjustment of the stencil during unlocking, this method is time-consuming, labor-intensive, and inaccurate, potentially requiring repeated adjustments, which is cumbersome and causes engineering losses. Therefore, this utility model provides a device that can automatically adjust the stencil guide rail 100, specifically including a mounting frame 10, an adjustment mechanism 20, and a locking mechanism 30. Each of the steel mesh guide rails 100 has a connecting hole 110 corresponding to the position of the adjustment mechanism 20, so that when the position of the steel mesh guide rail 100 needs to be adjusted, the adjustment mechanism 20 can be engaged with the steel mesh guide rail 100 through the connecting hole 110. Preferably, there is one connecting hole 110, because the adjustment mechanism 20 is mounted on the mounting frame 10. The adjustment mechanism 20 is fixed relative to the mounting frame 10 in a certain direction on the horizontal plane, such as the X or Y direction, or the length or width direction of the mounting frame 10 (in this embodiment, the width direction of the mounting frame 10), but is movable relative to the X direction of the mounting frame 10. Therefore, only one connecting hole 110 is needed. The mounting frame 10 is located below the two steel mesh guide rails 100 and is fixedly connected to the body. The mounting frame 10 extends along the moving direction of the steel mesh guide rails 100 in the unlocked state, that is, the length direction of the mounting frame 10 is along the moving direction of the steel mesh guide rails 100. The adjustment mechanism 20 is mounted on the mounting frame 10 and can slide relative to the mounting frame 10 along its extension direction or length direction, i.e., the movement direction of the steel mesh guide rail 100. Specifically, the length direction of the mounting frame 10 is perpendicular to the length direction of any steel mesh guide rail 100. It includes an adjustment component 21, a positioning camera 22, and a drive component 23. The adjustment component 21 is slidably connected to the mounting frame 10 and is used to mate with the connection hole 110 on the steel mesh guide rail 100 when the position of the steel mesh guide rail 100 needs to be adjusted. That is, the adjustment component 21 has an mating state with the connection hole 110 and a disengaged state with the connection hole 110. In other words, when the position of the steel mesh guide rail 100 does not need to be adjusted, the adjustment component 21 is disengaged from the steel mesh guide rail 100.The positioning camera 22 and the adjusting component 21 are arranged together so that they move synchronously when the adjusting component 21 moves relative to the mounting bracket 10. The positioning camera 22 is located on one side of the adjusting component 21 to detect and identify the position of the connecting hole 110 so that the adjusting component 21 can accurately align with the connecting hole 110. In addition, the positioning camera 22 can also be used to identify whether the position of the steel mesh guide rail 100 after adjustment is accurate. The driving end of the driving component 23 is connected to the adjusting component 21 and the positioning camera 22 to drive both to move synchronously relative to the mounting bracket 10 along the length direction of the mounting bracket 10 or in the moving direction of the steel mesh guide rail 100 in the unlocked state. The locking mechanism 30 is located between the machine body and the steel mesh guide rail 100 to connect the steel mesh guide rail 100 to the machine body in the locked state for locking and to release the connection between the steel mesh guide rail 100 and the machine body in the unlocked state.

[0043] For the drive component 23, such as Figure 3 and Figure 4 As shown, the mounting bracket 10 includes a drive motor 231, a drive rod 232, a drive slider 233, and a guide rail 234. The drive motor 231 is horizontally fixed to one end of the mounting bracket 10, with its drive end facing the other end of the mounting bracket 10. Specifically, the drive motor 231 is fixed to one end of one of the steel mesh guide rails 100 on the mounting bracket 10, and its drive end faces the other end of the mounting bracket 10 corresponding to the other steel mesh guide rail 100. One end of the drive rod 232 is connected to the drive end of the drive motor 231, and the other end is rotatably mounted on the other end of the mounting bracket 10 away from the drive motor 231. The drive rod 232 is also horizontally positioned and corresponds to the length or extension direction of the mounting bracket 10; it is also perpendicular to the length direction of any steel mesh guide rail 100. The drive slider 233 is slidably connected to the drive rod 232. Both the adjusting component 21 and the positioning camera 22 are mounted on the drive slider 233. The guide rail 234 follows the... Figure 3 or Figure 4 The vertical arrangement shown is located on one side of the mounting bracket 10, specifically as follows: Figure 3 or Figure 4 The steel mesh guide rail 100 extends along the length or extension direction of the mounting bracket 10, i.e., the direction of movement of the steel mesh guide rail 100 in the unlocked state, as shown on the front side. One end of the drive slider 233 is also as shown... Figure 3 or Figure 4 The rear end shown is in sliding engagement with the drive screw, and one end of the drive slider 233 is also as shown. Figure 3 or Figure 4The front end shown is slidably engaged with the guide rail 234. Driven by the drive motor 231, the drive rod 232 rotates horizontally around its axis, thereby causing the drive slider 233, which is slidably engaged with the drive rod 232, to move linearly along the axis of the drive rod 232. This, in turn, causes the adjusting component 21 and the positioning camera 22 on the drive slider 233 to move linearly. As an alternative embodiment, the drive component 23 may not include the guide rail 234, and the drive slider 233 may be directly slidably connected to the drive screw.

[0044] The structure and working principle of the positioning camera 22 are not described or limited, and are not the innovation of this utility model. They are existing conventional cameras with positioning functions, such as industrial CCDs, which are easily known and implemented in the field.

[0045] For the adjusting component 21, such as Figure 4 As shown, it includes a docking drive component 211 and a docking rod 212. The docking drive component 211 is specifically mounted on the drive slider 233 as follows: Figure 4 The fixed bracket (not shown) on the front face is shown, and the driving end of the docking drive member 211 is vertically upward. The docking rod 212 is vertically mounted on the driving end of the docking drive member 211 and is driven by the docking drive member 211 to move vertically up and down. That is, when the docking drive member 211 drives the docking rod 212 to rise, it can dock with the connecting hole 110, that is, insert into the connecting hole 110, thereby realizing the connection between the adjusting component 21 and the steel mesh track. At this time, the drive motor 231 drives the drive rod 232 to move the adjusting component 21 closer to or away from the other steel mesh guide rail 100, thereby completing the position adjustment of the steel mesh guide rail 100. During the movement, the positioning camera 22 identifies the position of the steel mesh guide rail 100. After the adjustment is identified, it stops. That is, the positioning camera 22 and the drive motor 231 are communicatively connected. The docking drive member 211 can be a conventional cylinder.

[0046] For the locking mechanism 30, such as Figure 1 and Figure 2 and Figure 5 and Figure 6 As shown, the locking mechanism 30 of this embodiment preferably includes a first locking mechanism 32 and a second locking mechanism 31, respectively corresponding to the two ends of the steel mesh guide rail 100 along its length. That is, the first locking mechanism 32 is located at one end of the steel mesh guide rail 100, for example... Figure 1 As shown on the left end, the second locking mechanism 31 is located at the other end of the steel mesh guide rail 100, i.e. Figure 1 The right end is shown.

[0047] Specifically, for the first locking mechanism 32, such as Figure 5 and Figure 6As shown, the first locking mechanism 32 includes two first locking components 321, which respectively correspond to the other ends of the two steel mesh guide rails 100, i.e. Figure 1 The left end is shown. Each first locking assembly 321 includes a first mounting plate 3211, a first fixing bracket 3212, and a first locking component 3213. The first mounting plate 3211 is arranged vertically, with its lower end connected to the corresponding steel mesh guide rail 100, and its upper end for mounting the first fixing bracket 3212 and the first locking component 3213. Specifically, the first fixing bracket 3212 is arranged along the direction of movement of the steel mesh guide rail 100 in the unlocked state, i.e., perpendicular to the length direction of the steel mesh guide rail 100. One end of the first fixing bracket 3212 is fixedly connected to the body, and the other end is connected to one side of the first mounting plate 3211. Specifically, as shown... Figure 6 The right end face is shown as a sliding connection. The first locking component 3213 is located on the other side of the first mounting plate 3211, i.e., as shown... Figure 6 On the left end face shown, the first locking component 3213 can extend or retract toward or away from the first fixed frame 3212. The side of the first fixed frame 3212 facing the first mounting plate 3211 is provided with a plurality of first locking holes 3214 at intervals along the length direction of the first fixed frame 3212, i.e., the direction of movement of the steel mesh guide rail 100 in the unlocked state. When the first locking component 3213 extends toward the first fixed frame 3212, it engages with the first locking holes 3214 to achieve connection between the steel mesh guide rail 100 and the corresponding first locking component 321, and to lock it relative to the body. The number of first locking holes 3214 is not described or limited, as is the case with second locking holes 314; those skilled in the art can choose and design accordingly. The first locking holes 3214 are preferably blind holes. Regarding the sliding fit connection method between the first mounting plate 3211 and the first fixed frame 3212, as... Figure 6 As shown, the side of the first mounting plate 3211 facing the first fixing bracket 3212 is also as follows Figure 6 The right end face shown is provided with a horizontal slider 3216, which is on the side of the first fixing bracket 3212 facing the first mounting plate 3211, i.e. Figure 6 The left end face shown is provided with a transverse guide rail 3215 extending along its length, and a transverse slider 3216 is slidably connected to the transverse guide rail 3215. This creates a gap on the side of the first mounting plate 3211 facing the first fixing frame 3212, within which the telescopic end of the first locking member 3213 can extend and retract horizontally. Preferably, the first locking member 3213 is a conventional cylinder.

[0048] like Figure 1 and Figure 2As shown, the second locking mechanism 31 includes a fixed guide rod 311, two second locking components 312, and a second fixing bracket 313. The two ends of the fixed guide rod 311 are fixedly connected to the machine body, and the axis of the fixed guide rod 311 is parallel to the movement direction of the steel mesh guide rail 100 in the unlocked state; that is, the length direction of the steel mesh guide rail 100 is perpendicular to the length direction of either steel mesh guide rail 100. The fixed guide rod 311 is located at one end of each of the two steel mesh guide rails 100, specifically as follows: Figure 1 The right end. Two second locking components 312 are respectively provided corresponding to the right ends of the two steel mesh guide rails 100. Specifically, each locking component includes a second mounting plate 3121, a slide block 3122, and a second locking member 3123. The second mounting plate 3121 is arranged vertically, and one end of the steel mesh guide rail 100 corresponding to it is also as shown. Figure 1 The right end connection is shown. The slide 3122 is disposed on one side of the second mounting plate 3121 in the thickness direction, specifically as shown below. Figure 1 The right end face shown has a horizontal through-hole on the slide block 3122 to facilitate sliding engagement with the fixed guide rod 311. The other side of the second mounting plate 3121 is also as shown... Figure 1 A second locking component 3123 is provided on the left end face shown. The second locking component 3123 can extend or retract towards or away from the second mounting plate 3121. When it extends away from the second mounting plate 3121, it can connect with the second fixing frame 313 to fix the steel mesh guide rail 100 to the second fixing frame 313, thereby locking the position of the steel mesh guide rail 100. The second locking component 3123 can be a conventional cylinder. The second fixing frame 313 is located above the two steel mesh guide rails 100 and is positioned towards the end of the two second locking components 3123 extending outwards. The length direction of the second fixing frame 313 is parallel to the fixing guide rod 311, that is, the length direction of the second fixing frame 313 is also along the moving direction of the steel mesh guide rail 100 in the unlocked state, that is, perpendicular to the length direction of the steel mesh guide rail 100. On the end face of the second fixing frame 313 facing the two second locking components 3123, a plurality of second locking holes 314 are provided corresponding to each of the second locking components 3123. These second locking holes 314 are spaced apart along the extension direction or length direction of the second fixing frame 313. In the locked state, each second locking component 3123 engages with its corresponding second locking hole 314 to lock the position of the steel mesh guide rail 100. The number of second locking holes 314 is not described or limited; it can be selected and set according to the actual specifications of the steel mesh. That is, after the steel mesh guide rail 100 is adjusted, the second locking component 3123 can cooperate with the second locking hole 314 to lock the steel mesh guide rail 100 to cover all specifications of steel mesh. The second locking holes 314 can be blind holes.

[0049] The two first locking components 3213 and the second locking component 3123 can be connected via a proportional valve (not shown). Specifically, the electro-proportional valve is connected to a controller (not shown), and then the controller is connected to the two first locking components 3213 and the two second locking components 3123. The proportional valve controls the connection between the first locking mechanism 32 and the second locking mechanism 31 and the steel mesh guide rail 100, enabling locking or unlocking, thus switching between locked and unlocked states. The proportional valve control is not an innovation of this invention; it is existing technology and easily understood and implemented by those skilled in the art. In other words, this invention is merely an improvement to the structure and does not involve improvements to the control logic.

[0050] In this embodiment of the utility model, the steel mesh guide rail adjustment device first uses a positioning camera 22 to identify the width of the steel mesh (not shown) to obtain the width to be adjusted of the steel mesh guide rail 100, which also determines the position of the steel mesh guide rail 100 after adjustment. Next, the proportional valve controls the first locking mechanism 32 and the second locking mechanism 31 to unlock the steel mesh guide rail 100 whose position needs to be adjusted. Then, the drive motor 231 drives the adjusting component 21 to move below one of the steel mesh guide rails 100. The positioning camera 22 identifies this so that the docking rod 212 of the adjusting component 21 is directly below the connecting hole 110 on the steel mesh guide rail 100. Then, the docking drive component 211 drives the docking rod 212 to rise into the connecting hole 110. After that, the drive motor 231 drives the adjusting mechanism to move along the length of the mounting bracket 10 (if the steel mesh width increases, it moves away from the other steel mesh guide rail 100; if the steel mesh width decreases, it moves closer to the other steel mesh guide rail 100). Once the positioning camera 22 identifies that the steel mesh guide rail 100 is in the adjusted position, the adjustment stops. Finally, the proportional valve controls the first locking mechanism 32 and the second locking mechanism 31 to lock the steel mesh guide rail 100, and the docking rod 212 descends and separates from the connecting hole 110 of the steel mesh guide rail 100. It can automatically adjust the steel mesh guide rail by 100mm, eliminating the need for manual adjustment. The adjustment is simple, accurate, and highly efficient. It has a simple structure and is highly practical.

[0051] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A stencil guide rail adjustment device for a solder paste printing machine, wherein the solder paste printing machine includes a machine body and two stencil guide rails disposed within the machine body, arranged opposite to each other and spaced apart along the stencil conveying direction, each of the stencil guide rails having a locked state to be fixed relative to the machine body or an unlocked state to move relative to the machine body towards or away from the other stencil guide rail, and being in a locked state during stencil conveying, characterized in that... A connection hole is provided on any of the steel mesh guide rails, and the adjustment device includes: The mounting bracket is located at the bottom of the two steel mesh guide rails and is fixedly connected to the body, and the mounting bracket extends along the moving direction of the steel mesh guide rails in the unlocked state. An adjustment mechanism includes an adjustment component, a positioning camera, and a drive component. The adjustment component is slidably connected to the mounting bracket and has a docking state that is connected to the connection hole and a disengaged state that is separated from the connection hole. The positioning camera is connected to the mounting bracket together with the adjustment component and is driven to slide synchronously relative to the mounting bracket. The drive component is disposed on the mounting bracket and its drive end is connected to the adjustment component and the positioning camera to drive the adjustment component and the positioning camera to move along the sliding direction of the adjustment mechanism. A locking mechanism is provided between the body and the two steel mesh guide rails, which connects the steel mesh guide rails to the body in the locked state and releases the connection between the steel mesh guide rails and the body in the unlocked state.

2. The adjusting device according to claim 1, characterized in that, The driving component includes: A drive motor is mounted on the mounting bracket; A drive rod is mounted on the mounting bracket and connected to the drive end of the drive motor and extends along the extension direction of the mounting bracket. The drive rod is driven by the drive motor to rotate horizontally about its axis. A drive slider is slidably connected to the drive rod, and the adjustment component and the positioning camera are both mounted on the drive slider.

3. The adjusting device according to claim 2, characterized in that, The driving component further includes a guide slide rail extending along the extension direction of the mounting bracket on the outer side of the mounting bracket, one end of the driving slider being slidably connected to the driving rod and the other end being slidably connected to the guide slide rail.

4. The adjusting device according to claim 2, characterized in that, The adjusting component includes: A docking drive component is mounted on a fixed frame fixed to the drive slider, with the drive end facing vertically upward. A docking rod is vertically disposed at the driving end of the docking drive member and is driven by the docking drive member to move vertically up and down.

5. The adjusting device according to claim 4, characterized in that, The docking drive component is a cylinder.

6. The adjusting device according to claim 1, characterized in that, The locking mechanism further includes a first locking mechanism disposed at one end of the two steel mesh guide rails, the first locking mechanism comprising: Two first locking components are respectively disposed at one end of the two steel mesh guide rails, and each first locking component includes a first mounting plate that is vertically arranged and fixed to the corresponding steel mesh guide rail, a first fixing frame that is slidably connected to one side of the first mounting plate and fixedly connected to the body along the moving direction of the steel mesh guide rail in the unlocked state, and a first locking component disposed on the other side of the first mounting plate and that can extend or retract toward or away from the first fixing frame. Each of the first fixing frames extends along the moving direction of the steel mesh guide rail in the unlocked state and has a plurality of first locking holes on the side facing the corresponding first locking component. The plurality of first locking holes are spaced apart along the extending direction of the first fixing frame. In the locked state, each of the first locking components is engaged with its corresponding first lock hole.

7. The adjusting device according to claim 6, characterized in that, The locking mechanism further includes a second locking mechanism disposed at the other end of the two steel mesh guide rails, the second locking mechanism comprising: A fixed guide rod is fixedly connected to the machine body at both ends, and its axis is parallel to the moving direction of the steel mesh guide rail in the unlocked state. Two second locking components are respectively disposed at one corresponding end of the two steel mesh guide rails, and each second locking component includes a second mounting plate that is vertically disposed and fixed to the corresponding steel mesh guide rail, a slide block that is slidably sleeved and connected to the fixed guide rod on one side of the second mounting plate, and a second locking component that is disposed on the other side of the second mounting plate and can extend or retract toward or away from the second mounting plate. The second fixing frame is fixed to the body and is opposite to the second locking component of the two second locking assemblies. The second fixing frame extends along the moving direction of the steel mesh guide rail in the unlocked state and has a plurality of second locking holes on the side facing the corresponding second locking component. The plurality of second locking holes are spaced apart along the extending direction of the second fixing frame. In the locked state, any of the second locking components engages with its corresponding second locking hole.

8. The adjusting device according to claim 7, characterized in that, Both the first locking component and the second locking component are cylinders.

9. The adjusting device according to claim 8, characterized in that, The two first locking components are connected by a proportional valve, and the two second locking components are connected by a proportional valve.

10. The adjusting device according to claim 7, characterized in that, Each of the first mounting brackets has a transverse guide rail extending along its extension direction on the side facing its corresponding first mounting plate, and each of the first mounting plates has a transverse slider that slides with the transverse guide rail on the side facing its corresponding first mounting bracket.

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