CN105784242A - Automatic detection machine for SMT printing steel mesh - Google Patents
Automatic detection machine for SMT printing steel mesh Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 76
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 54
- 239000010959 steel Substances 0.000 title claims abstract description 54
- 238000007639 printing Methods 0.000 title claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 89
- 238000013519 translation Methods 0.000 claims abstract description 42
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
- G01B11/2531—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object using several gratings, projected with variable angle of incidence on the object, and one detection device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/28—Measuring arrangements characterised by the use of optical techniques for measuring areas
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Abstract
本发明公开一种SMT印刷钢网自动检测机。该检测机包括Y向平移机构、钢网支撑压紧机构、X向平移机构和检测机构，所述X向平移机构和Y向平移机构分别为水平面上的互相垂直的X轴和Y轴方向；所述Y向平移机构包括减震座、底座，Y向导轨及其滑块，Y向滑台、条形光源、Y向光栅尺和Y向丝杠及其螺母；所述钢网支撑压紧机构包括活动支架、固定支架、钢网支撑板、Y向限位挡块、压紧气缸和钢网调节导轨及其滑块；所述X向平移机构包括两条X向导轨安装座、两条X向导轨及其滑块、X向丝杠及其螺母和X向光栅尺；所述检测机构包括摄像头连接板、摄像头、张力计连接板、张力计以及张力计升降调节组件。本发明检测机检测精度高，适用范围广。
The invention discloses an automatic detection machine for SMT printing steel mesh. The detection machine includes a Y-direction translation mechanism, a steel mesh support and compression mechanism, an X-direction translation mechanism and a detection mechanism, and the X-direction translation mechanism and the Y-direction translation mechanism are respectively perpendicular to each other on the X-axis and Y-axis directions on the horizontal plane; The Y-direction translation mechanism includes a shock-absorbing seat, a base, a Y-direction rail and its slider, a Y-direction slide table, a strip light source, a Y-direction grating ruler, a Y-direction lead screw and its nut; The mechanism includes a movable bracket, a fixed bracket, a steel mesh support plate, a Y-direction limit block, a compression cylinder, a steel mesh adjustment guide rail and its slider; the X-direction translation mechanism includes two X-direction rail mounting seats, two The X-direction rail and its slider, the X-direction lead screw and its nut and the X-direction grating ruler; the detection mechanism includes a camera connecting plate, a camera, a tensiometer connecting plate, a tensiometer and a tensiometer lifting adjustment assembly. The detection machine of the invention has high detection precision and wide application range.
Description
技术领域 technical field
本发明属于自动检测领域，具体是一种用于检测SMT印刷钢网张力以及钢网印刷孔位置、形状和精度的自动化机器。 The invention belongs to the field of automatic detection, in particular to an automatic machine for detecting the tension of SMT printing stencils and the position, shape and precision of stencil printing holes.
背景技术 Background technique
SMT（表面贴装工艺）是PCB板组装加工的核心技术。为满足贴装精度不断提高和贴装数量不断增加的需求，SMT加工中的锡膏印刷工艺要求日益严格。而SMT印刷钢网的质量是决定印刷质量好坏的关键因素。钢网张力和钢网开孔的形状精度、位置精度是钢网质量好坏的重要判别标志。 SMT (Surface Mount Technology) is the core technology of PCB board assembly and processing. In order to meet the needs of continuous improvement of mounting accuracy and mounting quantity, the requirements of solder paste printing process in SMT processing are becoming increasingly stringent. The quality of SMT printing stencil is the key factor to determine the printing quality. The tension of the stencil and the shape accuracy and position accuracy of the opening of the stencil are important signs for distinguishing the quality of the stencil.
中国专利CN201110188321.5公开了一种印刷钢网自动检测装置。它采用在钢网支撑台外部设置安装在矩形支架上的三坐标联动丝杠装置，并在联动丝杠装置上设置安装了传感器的工作头，用于检测钢网的张力、厚度、压力及钢网开孔的形位精度。但该装置采用的三坐标联动丝杠装置包括均由伺服电机驱动的横轴丝杠、纵轴丝杠、竖轴丝杠和滑轨装置，纵轴丝杠一端连接在横轴丝杠的滑块上，另一端悬空呈悬臂状，而竖轴丝杠及其滑轨装置以及工作头均安装在纵轴丝杠的滑块上，这种三坐标丝杠装置由于横轴丝杠与其滑轨需并排布置以支撑纵轴丝杠保持水平，增加了整个检测装置的占地面积和装置的成本，不利于推广应用。且由于纵轴丝杠呈悬臂状，而竖轴丝杠及工作头均需要在纵轴丝杠上运动，容易因纵轴丝杠的弯曲影响检测精度。该钢网检测装置只能适应同一规格的钢网，使用范围窄。 Chinese patent CN201110188321.5 discloses an automatic detection device for printing steel mesh. It adopts a three-coordinate linkage screw device installed on a rectangular bracket outside the steel mesh support table, and a working head with sensors installed on the linkage screw device is used to detect the tension, thickness, pressure and steel mesh of the steel mesh. The shape and position accuracy of the mesh opening. However, the three-coordinate linkage screw device used in this device includes a horizontal axis screw, a vertical axis screw, a vertical axis screw and a slide rail device all driven by a servo motor. The other end is suspended in the air in the shape of a cantilever, and the vertical axis screw and its slide rail device and the working head are installed on the slider of the vertical axis screw. This three-coordinate screw device is due to the horizontal axis screw and its slide rail. They need to be arranged side by side to support the vertical axis lead screw to keep it horizontal, which increases the floor area of the entire detection device and the cost of the device, which is not conducive to popularization and application. Moreover, since the vertical axis screw is in the shape of a cantilever, and both the vertical axis screw and the working head need to move on the vertical axis screw, the detection accuracy is easily affected by the bending of the vertical axis screw. The stencil detection device can only be adapted to stencils of the same specification, and has a narrow application range.
因此提供一种结构简单，占地面积小，检测精度高、适应钢网范围广的SMT钢网检测装置成为现有技术中亟待解决的问题。 Therefore, it is an urgent problem to be solved in the prior art to provide a SMT stencil detection device with simple structure, small floor space, high detection accuracy and wide adaptability to stencil range.
发明内容 Contents of the invention
针对现有技术中存在的问题，本发明拟解决的技术问题是，提供一种SMT印刷钢网自动检测机。该检测机具有检测精度高，检测速度快，可适用于不同规格的钢网检测等特点。 Aiming at the problems existing in the prior art, the technical problem to be solved by the present invention is to provide an automatic inspection machine for SMT printing stencils. The detection machine has the characteristics of high detection accuracy, fast detection speed, and can be applied to the detection of steel mesh of different specifications.
本发明解决所述技术问题的技术方案是，设计一种SMT印刷钢网自动检测机，其特征在于该检测机包括Y向平移机构、钢网支撑压紧机构、X向平移机构和检测机构，所述X向平移机构和Y向平移机构分别为水平面上的互相垂直的X轴和Y轴方向； The technical solution of the present invention to solve the technical problem is to design an automatic SMT printing stencil inspection machine, which is characterized in that the inspection machine includes a Y-direction translation mechanism, a stencil support and compression mechanism, an X-direction translation mechanism and a detection mechanism, The X-direction translation mechanism and the Y-direction translation mechanism are mutually perpendicular X-axis and Y-axis directions on the horizontal plane;
所述Y向平移机构包括减震座、底座，Y向导轨及其滑块，Y向滑台、条形光源、Y向光栅尺和Y向丝杠及其螺母；所述底座为由横梁组成的矩形框架，底座的四个底角分别安装减震座，底座的两条Y向横梁上对称安装两个Y向导轨安装座，所述Y向导轨安装座为顶部高出底座上表面的直立板，Y向导轨分别安装在两个Y向导轨安装座的顶部，所述Y向滑台由底板、两块直立连接板和两块连接块组成，所述两个连接块的底部分别与两条Y向导轨的滑块连接，所述底板水平位于底座的上表面上方，底板长轴垂直于Y轴方向，且两端分别接近两个Y向导轨安装座的内立面根部，底板两端分别与直立连接板的底部连接，直立连接板顶部分别与连接块连接，底板与直立连接板构成开口朝上的U型折板；所述底板与Y向丝杠的螺母连接，所述Y向丝杠位于底座和底板上表面之间，Y向丝杠旋转可以带动Y向滑台沿Y向运动；Y向丝杠由Y轴伺服电机驱动旋转；所述条形光源位于底板的侧面，所述Y向光栅尺的标尺光栅和光栅读数头分别安装在底座和Y向滑台上，用于确定Y向滑台在Y向的精确位置； The Y-direction translation mechanism includes a shock-absorbing seat, a base, a Y-direction rail and its slider, a Y-direction slide table, a strip light source, a Y-direction grating ruler, a Y-direction screw and its nut; the base is composed of a beam The four bottom corners of the base are respectively equipped with shock-absorbing seats, and two Y-direction rail mounting seats are symmetrically installed on the two Y-direction beams of the base. The Y-guided rails are respectively installed on the top of the two Y-guided rail mounting seats. The Y-directed slide table is composed of a bottom plate, two upright connecting plates and two connecting blocks. The bottoms of the two connecting blocks are respectively connected to the two The bar Y guide rail is connected to the slider, the bottom plate is horizontally located above the upper surface of the base, the long axis of the bottom plate is perpendicular to the Y axis direction, and the two ends are respectively close to the roots of the inner facade of the two Y guide rail mounting seats, and the two ends of the bottom plate They are respectively connected to the bottom of the upright connecting plate, and the top of the upright connecting plate is respectively connected to the connecting block, and the bottom plate and the upright connecting plate form a U-shaped folding plate with the opening facing upward; the bottom plate is connected to the nut of the Y-direction screw, and the Y-direction The screw is located between the base and the upper surface of the bottom plate, and the rotation of the Y-direction screw can drive the Y-direction sliding table to move along the Y direction; the Y-direction screw is driven by the Y-axis servo motor to rotate; the strip light source is located on the side of the bottom plate, so The scale grating and the grating reading head of the Y-direction grating ruler are respectively installed on the base and the Y-direction slide table to determine the precise position of the Y-direction slide table in the Y direction;
所述钢网支撑压紧机构包括活动支架、固定支架、钢网支撑板、Y向限位挡块，压紧气缸和钢网调节导轨及其滑块，所述固定支架包括固定水平支架与两个支架座，支架座位于底座的横梁上，两个支架座分别接近一侧Y向导轨座两端，所述固定水平支架与Y向导轨平行，并通过支架座跨接在Y向滑台的底板上方；所述钢网调节导轨有两条，分别安装在底座的两个X向横梁上方，钢网调节导轨的滑块与活动支架的两端连接，活动支架也跨接在Y向滑台的底板上方，且与固定水平支架安装高度相同，活动支架与固定水平支架平行，且可以沿钢网调节导轨滑动，并与钢网调节导轨锁紧；所述钢网支撑板有两条，分别安装于活动支架与固定水平支架上，两条钢网支撑板分别安装有用于将钢网压紧在钢网支撑板上的压紧气缸，钢网支撑板的端部具有Y向限位挡块； The steel mesh support compression mechanism includes a movable bracket, a fixed bracket, a steel mesh support plate, a Y-direction limit block, a compression cylinder, a steel mesh adjustment guide rail and a slide block thereof, and the fixed bracket includes a fixed horizontal bracket and two Two support seats, the support seats are located on the beam of the base, and the two support seats are respectively close to the two ends of the Y guide rail seat on one side. Above the bottom plate; there are two steel mesh adjustment guide rails, which are respectively installed above the two X-direction beams of the base. The sliders of the steel mesh adjustment guide rails are connected to the two ends of the movable bracket, and the movable bracket is also connected to the Y-direction slide table above the bottom plate, and the installation height is the same as that of the fixed horizontal support, the movable support is parallel to the fixed horizontal support, and can slide along the steel mesh adjustment guide rail, and lock with the steel mesh adjustment guide rail; the steel mesh support plate has two, respectively Installed on the movable bracket and the fixed horizontal bracket, the two stencil support plates are respectively equipped with a compression cylinder for pressing the stencil on the stencil support plate, and the end of the stencil support plate has a Y-direction limit stop ;
所述X向平移机构包括两条X向导轨安装座、两条X向导轨及其滑块、X向丝杠及其螺母、X向光栅尺；所述X向导轨安装座有两条，每条X向导轨安装座的两端分别连接到Y向滑台的两个连接板块上，两条X向导轨分别安装在两个X向导轨安装座上，两条X向导轨安装座在Y向上的距离能够容纳X向丝杠及其螺母的安装，所述X向丝杠位于两条X向导轨安装座之间，X向丝杠的螺母及X向导轨的滑块顶端用于安装检测机构安装板，所述X向丝杠由X轴伺服电机驱动；所述X向光栅尺的标尺光栅安装在X向导轨安装座底部，X向光栅尺的读数头与检测机构安装板相对固定连接，用于确定检测机构安装板在X向的精确位置； The X-direction translation mechanism includes two X-direction rail mounting seats, two X-direction rails and their sliders, an X-direction screw and its nut, and an X-direction grating ruler; there are two X-direction rail mounting seats, each The two ends of the X-guided rail mounting seat are respectively connected to the two connecting plates of the Y-directed slide table, the two X-guiding rails are respectively installed on the two X-guiding rail mounting seats, and the two X-guiding rail mounting seats are in the Y direction The distance can accommodate the installation of the X-direction screw and its nut. The X-direction screw is located between the two X-direction rail mounting seats. The nut of the X-direction screw and the top of the slider of the X-direction rail are used to install the detection mechanism. The mounting plate, the X-direction lead screw is driven by the X-axis servo motor; the scale grating of the X-direction grating ruler is installed on the bottom of the X-direction rail mounting seat, and the reading head of the X-direction grating ruler is relatively fixedly connected with the detection mechanism mounting plate, Used to determine the precise position of the detection mechanism mounting plate in the X direction;
所述检测机构包括摄像头连接板、摄像头、张力计连接板、张力计，以及张力计升降调节组件；检测机构安装板两端分别与摄像头连接板与张力计连接板相连接，所述摄像头连接板与张力计连接板分别用于安装摄像头与张力计，所述摄像头与张力计分别位于X向平移机构的两侧，并分别用于检测钢网张力及开孔的尺寸和位置，张力计通过张力计升降调节组件与张力计连接板连接；所述摄像头连接板为由水平板和竖直板构成的L型折板，水平板的内表面固定安装在检测机构安装板上，竖直板从X向平移机构一侧竖直向下伸出，摄像头竖直朝下安装在竖直板的外表面；所述张力计连接板为由水平板和竖直板构成的L型折板，水平板的内表面固定安装在检测机构安装板上，竖直板从X向平移机构另一侧竖直向下伸出，所述张力计通过张力计升降调节组件连接在竖直板外表面，通过张力计升降组件可以调节张力计与待检测钢网之间的距离，张力计升降组件将张力计的测试座置于待测钢网上后，可以调节张力计升降调节组件与张力计之间无相互作用力。 The detection mechanism includes a camera connecting plate, a camera, a tensiometer connecting plate, a tensiometer, and a tensiometer lifting adjustment assembly; the two ends of the detecting mechanism mounting plate are respectively connected with the camera connecting plate and the tensiometer connecting plate, and the camera connecting plate The connecting plate with the tensiometer is used to install the camera and the tensiometer respectively. The camera and the tensiometer are respectively located on both sides of the X-direction translation mechanism, and are used to detect the steel mesh tension and the size and position of the opening respectively. The tensiometer passes the tension The meter lifting adjustment assembly is connected with the tensiometer connecting plate; the camera connecting plate is an L-shaped folding plate composed of a horizontal plate and a vertical plate, the inner surface of the horizontal plate is fixedly installed on the detection mechanism mounting plate, and the vertical plate is from X Protrude vertically downward toward one side of the translation mechanism, and the camera is installed vertically downward on the outer surface of the vertical plate; the tensiometer connecting plate is an L-shaped folding plate composed of a horizontal plate and a vertical plate, and the horizontal plate The inner surface is fixedly installed on the detection mechanism mounting plate, and the vertical plate protrudes vertically downward from the other side of the X-direction translation mechanism. The tensiometer is connected to the outer surface of the vertical plate through the tensiometer lifting adjustment component, The lifting component can adjust the distance between the tensiometer and the stencil to be tested. After the tensiometer lifting component places the test seat of the tensiometer on the stencil to be tested, it can adjust the non-interactive force between the tensiometer lifting adjustment component and the tensiometer .
与现有技术相比，本发明检测机采用所述技术方案所能达到的有益效果是： Compared with the prior art, the beneficial effects that the detection machine of the present invention can achieve by adopting the technical solution are:
1）采用了横梁组成的矩形底座作为整个SMT印刷钢网自动检测机（以下简称检测机）的底座，改进了X、Y向平移机构的结构，使带动滑台的丝杠位于两条导轨的中间，使整个平移机构的载荷能够均匀分布分布于底座的Y向横梁上，避免了采用悬臂结构时因平移机构运动引起的容易影响检测精度的弯曲和晃动。 1) A rectangular base composed of beams is used as the base of the entire SMT printing stencil automatic inspection machine (hereinafter referred to as the inspection machine), and the structure of the translation mechanism in the X and Y directions is improved, so that the screw driving the sliding table is located between the two guide rails. In the middle, the load of the entire translation mechanism can be evenly distributed on the Y-direction beam of the base, avoiding the bending and shaking that may easily affect the detection accuracy caused by the movement of the translation mechanism when the cantilever structure is used.
2）采用了全新结构的钢网支撑压紧机构，将钢网支撑压紧机构置于X向滑台和Y向滑台之间，可以降低钢网检测机的整体高度，可以解决安装空间。采用了安装在底座的X向横梁上的钢网调节导轨与活动水平支架，使本发明提供的钢网检测机可以适用于不同规格的待检测钢网，提高了适用范围，由于钢网支撑压紧机构与底座的连接点均位于X向横梁上，可以进一步优化底座的载荷分布，有利于简化系统结构与提高检测精度。 2) The steel mesh support and compression mechanism with a new structure is adopted, and the steel mesh support and compression mechanism is placed between the X-direction slide table and the Y-direction slide table, which can reduce the overall height of the steel mesh inspection machine and solve the problem of installation space. The stencil adjustment guide rail and movable horizontal support installed on the X-direction beam of the base are adopted, so that the stencil detector provided by the present invention can be applied to the stencils to be detected of different specifications, and the scope of application is improved. Due to the support pressure of the stencil The connection points between the tightening mechanism and the base are located on the X-direction beam, which can further optimize the load distribution of the base, which is beneficial to simplify the system structure and improve the detection accuracy.
3）由于采用了改进结构的X、Y向平移机构，使本发明可以采用光栅尺为钢网检测机构的平面位置进行精确定位，在检测钢网开孔形状的同时还能精确检测其位置精度，增加了检测获得的参数项目，提高了检测效率和精度。 3) Due to the adoption of the X and Y direction translation mechanism with improved structure, the present invention can use the grating ruler to accurately locate the plane position of the stencil detection mechanism, and can accurately detect its position accuracy while detecting the shape of the stencil opening , increasing the parameter items obtained by the detection, improving the detection efficiency and accuracy.
4）改进了钢网检测机构中的张力计升降组件的结构可以在张力计的测试座置于待检测钢网上时张力计与张力计升降调节组件之间无相互作用力，满足张力计进行张力检测时的要求，从而无需要采用竖轴丝杠对张力计进行预加载荷，在简化设备机构，降低设备成本的基础上，能够提高张力检测精度。 4) The structure of the tensiometer lifting component in the stencil detection mechanism is improved. When the test seat of the tensiometer is placed on the steel net to be tested, there is no interaction force between the tensiometer and the tensiometer lifting adjustment component, which satisfies the tension gauge. Therefore, it is not necessary to use the vertical axis screw to preload the tensiometer. On the basis of simplifying the equipment structure and reducing the cost of the equipment, the tension detection accuracy can be improved.
本发明提供的钢网检测机通过改进机构的结构与布局，简化了整体结构，减少了安装空间要求，提高了检测精度、增加了适用的钢网范围。 The stencil detector provided by the invention simplifies the overall structure by improving the structure and layout of the mechanism, reduces the installation space requirement, improves the detection accuracy, and increases the applicable stencil range.
附图说明 Description of drawings
图1为本发明SMT印刷钢网自动检测机一种实施例的整体结构示意图。 FIG. 1 is a schematic diagram of the overall structure of an embodiment of the SMT printing stencil automatic inspection machine of the present invention.
图2为本发明SMT印刷钢网自动检测机一种实施例的Y向平移机构的结构示意图。 Fig. 2 is a structural schematic diagram of the Y-direction translation mechanism of an embodiment of the SMT printing stencil automatic inspection machine of the present invention.
图3为本发明SMT印刷钢网自动检测机一种实施例的钢网支撑压紧机构的结构示意图。 Fig. 3 is a structural schematic diagram of a stencil supporting and pressing mechanism of an embodiment of the SMT printing stencil automatic inspection machine of the present invention.
图4为本发明SMT印刷钢网自动检测机一种实施例的张力计升降调节组件结构示意图。 Fig. 4 is a schematic structural diagram of the tensiometer lifting adjustment assembly of an embodiment of the SMT printing stencil automatic inspection machine of the present invention.
图5为本发明SMT印刷钢网自动检测机一种实施例的X向平移机构的结构示意图。 Fig. 5 is a structural schematic diagram of an X-direction translation mechanism of an embodiment of the SMT printing stencil automatic inspection machine of the present invention.
图中，1、Y向平移机构，11、减震座，111、Y轴伺服电机，12、底座，13、Y向导轨，15、Y向滑台、151、底板，152、直立连接板，153、连接块，16、Y向丝杠，19、条形光源、18、Y向光栅尺；2、钢网支撑压紧机构，22、钢网支撑板，23，压紧气缸，25、钢网调节导轨，26、Y向限位挡块，28、活动支架，29、固定支架，291、水平固定支架，292、支架座；3、检测机构，30、摄像头，31、张力计，32、弧形夹持件，33、张力计连接板，34、张力计升降气缸，35、挡块，36、张力计调节螺杆，37张力计连接块，38、张力计升降调节组件，39、摄像头连接板；4、X向平移机构，42、X向光栅尺，43、X向导轨安装座，44、X向丝杠，45、检测机构安装板，47、X向导轨。 In the figure, 1, Y-direction translation mechanism, 11, shock absorber, 111, Y-axis servo motor, 12, base, 13, Y-direction guide rail, 15, Y-direction slide table, 151, base plate, 152, upright connecting plate, 153, connection block, 16, Y-direction screw, 19, strip light source, 18, Y-direction grating ruler; 2, stencil support compression mechanism, 22, stencil support plate, 23, compression cylinder, 25, steel Net adjustment guide rail, 26, Y direction limit block, 28, movable support, 29, fixed support, 291, horizontal fixed support, 292, support seat; 3, detection mechanism, 30, camera, 31, tensiometer, 32, Arc clamp, 33. Tension meter connecting plate, 34. Tension meter lifting cylinder, 35. Block, 36. Tension meter adjustment screw, 37 Tension meter connection block, 38. Tension meter lifting adjustment assembly, 39. Camera connection Plate; 4, X direction translation mechanism, 42, X direction grating ruler, 43, X direction guide mounting seat, 44, X direction lead screw, 45, detection mechanism mounting plate, 47, X direction guide rail.
具体实施方式 detailed description
下面结合具体实施例及附图进一步详细阐述本发明。 The present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.
本发明设计的SMT印刷钢网自动检测机（简称检测机，参见图1-5）一种实施例的总体结构如图1所示，Y向平移机构的结构如图2所示，钢网支撑压紧机构的结构如图3所示，张力计升降调节组件（包括了张力计及张力计连接板）的结构如图4所示，X向平移机构的结构如图5所示。 The overall structure of an embodiment of the SMT printing stencil automatic detection machine (referred to as the detection machine, see Figures 1-5) designed by the present invention is shown in Figure 1, and the structure of the Y-direction translation mechanism is shown in Figure 2. The structure of the pressing mechanism is shown in Figure 3, the structure of the tensiometer lifting adjustment assembly (including the tensiometer and the tensiometer connecting plate) is shown in Figure 4, and the structure of the X-direction translation mechanism is shown in Figure 5.
本发明检测机的特征在于该检测机包括Y向平移机构1、钢网支撑压紧机构2、X向平移机构4和检测机构3，所述X向平移机构4和Y向平移机构1分别为水平面上的互相垂直的X轴和Y轴方向。 The detection machine of the present invention is characterized in that the detection machine includes a Y-direction translation mechanism 1, a stencil support and compression mechanism 2, an X-direction translation mechanism 4 and a detection mechanism 3, and the X-direction translation mechanism 4 and the Y-direction translation mechanism 1 are respectively X-axis and Y-axis directions perpendicular to each other on the horizontal plane.
所述Y向平移机构1包括减震座11、底座12，Y向导轨13及其滑块，Y向滑台15、条形光源19、Y向光栅尺18和Y向丝杠16及其螺母；所述底座12为由横梁组成的矩形框架，底座12的四个底角分别安装减震座11，底座12的两条Y向横梁上对称安装两个Y向导轨安装座，所述Y向导轨安装座为顶部高出底座12上表面的直立板，Y向导轨13分别安装在两个Y向导轨安装座的顶部，所述Y向滑台由底板151、两块直立连接板152和两块连接块153组成，所述两个连接块153的底部分别与两条Y向导轨13的滑块连接，所述底板151水平位于底座12的上表面上方，底板151长轴垂直于Y轴方向，且两端分别接近两个Y向导轨安装座的内立面根部，底板151两端分别与直立连接板152的底部连接，直立连接板152顶部分别与连接块153连接，底板151与直立连接板152构成开口朝上的U型折板；所述底板151与Y向丝杠16的螺母连接，所述Y向丝杠16位于底座12和底板151上表面之间，Y向丝杠16旋转可以带动Y向滑台15沿Y向运动；Y向丝杠16由Y轴伺服电机111驱动旋转；所述条形光源19位于底板151的侧面，所述Y向光栅尺18的标尺光栅和光栅读数头分别安装在底座12和Y向滑台15上，用于确定Y向滑台15在Y向的精确位置； The Y-direction translation mechanism 1 includes a shock-absorbing seat 11, a base 12, a Y-direction rail 13 and its slider, a Y-direction slide table 15, a strip light source 19, a Y-direction grating ruler 18, a Y-direction lead screw 16 and nuts thereof ; The base 12 is a rectangular frame composed of crossbeams, and the four bottom corners of the base 12 are respectively equipped with shock absorbers 11, and two Y-direction rail mounting seats are symmetrically installed on the two Y-direction crossbeams of the base 12, and the Y-direction The guide rail mounting seat is the upright plate whose top is higher than the upper surface of the base 12, and the Y guide rails 13 are installed on the tops of the two Y guide rail mounting seats respectively. The bottom of the two connecting blocks 153 are respectively connected with the sliders of the two Y guide rails 13, the bottom plate 151 is horizontally located above the upper surface of the base 12, and the long axis of the bottom plate 151 is perpendicular to the Y-axis direction , and the two ends are respectively close to the roots of the inner facades of the two Y-guided rail mounting seats, the two ends of the bottom plate 151 are respectively connected to the bottom of the upright connecting plate 152, the top of the upright connecting plate 152 is respectively connected to the connecting block 153, and the bottom plate 151 is connected to the upright The plate 152 forms a U-shaped folding plate with an opening facing upward; the bottom plate 151 is connected to the nut of the Y-direction screw 16, and the Y-direction screw 16 is located between the base 12 and the upper surface of the bottom plate 151, and the Y-direction screw 16 rotates It can drive the Y-direction sliding table 15 to move along the Y-direction; the Y-direction screw 16 is driven to rotate by the Y-axis servo motor 111; The reading head is respectively installed on the base 12 and the Y-direction slide 15 for determining the precise position of the Y-direction slide 15 in the Y direction;
所述钢网支撑压紧机构2包括活动支架28、固定支架29、钢网支撑板22、Y向限位挡块26，压紧气缸23和钢网调节导轨25及其滑块，所述固定支架29包括固定水平支架291与两个支架座292，支架座292位于底座12的横梁上，两个支架座292分别接近一侧Y向导轨座两端，所述固定水平支架191与Y向导轨平行，并通过支架座292跨接在Y向滑台15的底板151上方； Described stencil support compression mechanism 2 comprises movable support 28, fixed support 29, stencil support plate 22, Y direction limit block 26, compresses cylinder 23 and stencil adjustment guide rail 25 and slide block thereof, and described fixed The support 29 includes a fixed horizontal support 291 and two support seats 292. The support seat 292 is located on the beam of the base 12. The two support seats 292 are respectively close to the two ends of the Y guide rail seat on one side. The fixed horizontal support 191 and the Y guide rail Parallel, and bridged above the bottom plate 151 of the Y-direction slide 15 through the bracket seat 292;
所述钢网调节导轨25有两条，分别安装在底座12的两个X向横梁上方，钢网调节导轨25的滑块与活动支架28的两端连接，活动支架28也跨接在Y向滑台15的底板151上方，且与固定水平支架291安装高度相同，活动支架28与固定水平支架291平行，且可以沿钢网调节导轨25滑动，并与钢网调节导轨25锁紧； There are two steel mesh adjustment guide rails 25, which are respectively installed above the two X-direction crossbeams of the base 12. The slide block of the steel mesh adjustment guide rail 25 is connected with the two ends of the movable bracket 28, and the movable bracket 28 is also bridged in the Y direction. Above the base plate 151 of the slide table 15, and the installation height is the same as the fixed horizontal support 291, the movable support 28 is parallel to the fixed horizontal support 291, and can slide along the steel mesh adjustment guide rail 25, and lock with the steel mesh adjustment guide rail 25;
所述钢网支撑板22有两条，分别安装于活动支架28与固定水平支架291上，两条钢网支撑板22分别安装有用于将钢网压紧在钢网支撑板22上的压紧气缸23，钢网支撑板22的端部具有Y向限位挡块26； Described stencil support plate 22 has two, is installed on movable support 28 and fixed horizontal support 291 respectively, and two stencil support plates 22 are respectively equipped with and are used for compressing steel net on stencil support plate 22. The cylinder 23, the end of the steel mesh support plate 22 has a Y-direction limit stopper 26;
所述X向平移机构1包括两条X向导轨安装座43、两条X向导轨47及其滑块、X向丝杠44及其螺母、X向光栅尺42；所述X向导轨安装座43有两条，每条X向导轨安装座43的两端分别连接到Y向滑台的两个连接板块153上，两条X向导轨47分别安装在两个X向导轨安装座43上，两条X向导轨安装座43在Y向上的距离能够容纳X向丝杠44及其螺母的安装，所述X向丝杠44位于两条X向导轨安装座43之间，X向丝杠44的螺母及X向导轨47的滑块顶端用于安装检测机构安装板45，所述X向丝杠44由X轴伺服电机驱动；所述X向光栅尺42的标尺光栅安装在X向导轨安装座43底部，X向光栅尺42的读数头与检测机构安装板45相对固定连接，用于确定检测机构安装板45在X向的精确位置； The X-direction translation mechanism 1 includes two X-direction rail mounts 43, two X-direction rails 47 and their sliders, an X-direction screw 44 and its nut, and an X-direction grating ruler 42; the X-direction rail mounts There are two 43, the two ends of each X-guided rail mounting seat 43 are respectively connected to the two connecting plates 153 of the Y-direction slide table, and the two X-guided rails 47 are respectively installed on the two X-guided rail mounting seats 43, The distance between the two X-guided rail mounts 43 in the Y direction can accommodate the installation of the X-directed screw 44 and its nut. The X-directed screw 44 is located between the two X-guided rail mounts 43, and the X-directed screw 44 The nut and the top of the slide block of the X guide rail 47 are used to install the detection mechanism mounting plate 45, and the X direction lead screw 44 is driven by the X axis servo motor; the scale grating of the X direction grating ruler 42 is installed on the X guide rail. At the bottom of the seat 43, the reading head of the X-direction grating ruler 42 is relatively fixedly connected with the detection mechanism mounting plate 45, for determining the precise position of the detection mechanism mounting plate 45 in the X direction;
所述检测机构3包括摄像头连接板39、摄像头30、张力计连接板33、张力计31，以及张力计升降调节组件38；检测机构安装板45两端分别与摄像头连接板39与张力计连接板33相连接，所述摄像头连接板39与张力计连接板33分别用于安装摄像头30与张力计31，所述摄像头30与张力计31分别位于X向平移机构1的两侧，并分别用于检测钢网张力及开孔的尺寸和位置，张力计31通过张力计升降调节组件38与张力计连接板33连接；所述摄像头连接板39为由水平板和竖直板构成的L型折板，水平板的内表面固定安装在检测机构安装板45上，竖直板从X向平移机构1一侧竖直向下伸出，摄像头30竖直朝下安装在竖直板的外表面；所述张力计连接板33为由水平板和竖直板构成的L型折板，水平板的内表面固定安装在检测机构安装板45上，竖直板从X向平移机构1另一侧竖直向下伸出，所述张力计31通过张力计升降调节组件38连接在竖直板外表面，通过张力计升降组件38可以调节张力计31与待检测钢网之间的距离，张力计升降组件38将张力计31的测试座置于待测钢网上后，可以调节张力计升降调节组件38与张力计31之间无相互作用力。 The detection mechanism 3 comprises a camera connecting plate 39, a camera 30, a tensiometer connecting plate 33, a tensiometer 31, and a tensiometer lifting adjustment assembly 38; the two ends of the detecting mechanism mounting plate 45 are respectively connected to the camera connecting plate 39 and the tensiometer connecting plate 33, the camera connecting plate 39 and the tensiometer connecting plate 33 are used to install the camera 30 and the tensiometer 31 respectively, and the camera 30 and the tensiometer 31 are respectively located on both sides of the X-direction translation mechanism 1, and are respectively used for Detect the steel mesh tension and the size and position of the opening, and the tensiometer 31 is connected to the tensiometer connecting plate 33 through the tensiometer lifting adjustment assembly 38; the camera connecting plate 39 is an L-shaped folding plate composed of a horizontal plate and a vertical plate , the inner surface of the horizontal plate is fixedly installed on the detection mechanism mounting plate 45, the vertical plate protrudes vertically downward from one side of the X-direction translation mechanism 1, and the camera 30 is installed vertically downward on the outer surface of the vertical plate; The tensiometer connection plate 33 is an L-shaped folded plate composed of a horizontal plate and a vertical plate. The inner surface of the horizontal plate is fixedly mounted on the detection mechanism mounting plate 45, and the vertical plate is vertical from the other side of the X-direction translation mechanism 1. Stretch downwards, the tensiometer 31 is connected to the outer surface of the vertical plate by the tensiometer lifting assembly 38, the distance between the tensiometer 31 and the steel mesh to be detected can be adjusted by the tensiometer lifting assembly 38, the tensiometer lifting assembly 38 After placing the test seat of the tensiometer 31 on the steel mesh to be tested, the non-interactive force between the tensiometer lifting adjustment assembly 38 and the tensiometer 31 can be adjusted.
本发明检测机的进一步特征在于所述张力计升降调节组件38包括张力计升降气缸34、张力计调节螺杆36和张力计连接块37，张力计升降气缸34安装在张力计连接板33的竖直板外表面，张力计升降气缸34的缸杆可以竖直向下伸出，张力计调节螺杆36垂直于水平面，两端分别与张力计升降气缸34的缸杆末端和张力计连接块37连接，张力计连接块37将张力计31连接于张力计连接板33的竖直板的外表面，通过张力计调节螺杆36可以调节张力计连接块37与张力计升降气缸34缸杆末端的距离，通过张力计升降气缸34动作可以控制张力计连接块37的升降。 The further feature of the detection machine of the present invention is that the tensiometer lifting adjustment assembly 38 includes a tensiometer lifting cylinder 34, a tensiometer adjusting screw 36 and a tensiometer connecting block 37, and the tensiometer lifting cylinder 34 is installed on the vertical surface of the tensiometer connecting plate 33. On the outer surface of the board, the cylinder rod of the tensiometer lifting cylinder 34 can extend vertically downwards, the tensiometer adjusting screw 36 is perpendicular to the horizontal plane, and the two ends are respectively connected with the end of the cylinder rod of the tensiometer lifting cylinder 34 and the tensiometer connecting block 37, The tensiometer connecting block 37 connects the tensiometer 31 to the outer surface of the vertical plate of the tensiometer connecting plate 33, and the distance between the tensiometer connecting block 37 and the tensiometer lifting cylinder 34 cylinder rod ends can be adjusted by the tensiometer adjusting screw rod 36. The tensiometer lifting cylinder 34 action can control the lifting of the tensiometer connecting block 37.
本发明检测机的进一步特征是所述支架座292位于X向横梁上，每条钢网支撑板22上安装2-5个压紧气缸23，压紧气缸23采用气动换向阀27控制动作。实施例的所述压紧气缸23为3个。实施例中采用的张力计31的仪表盘与测试座之间具有连接颈311，张力计升降调节组件38还包括弧形夹持件32，张力计连接块37通过弧形夹持件32夹持连接颈311，并可以通过张力计升降调节组件38夹持张力计31竖直移动，弧形夹持件32的半径大于连接颈311的半径，当弧形夹持件32夹持张力计31下降至与待测钢网接触后继续稍下降即可使张力计31与张力计升降调节组件38之间无相互作用力。所述连接块37上还具有阻止张力计31在提升和转运过程中发生横向摆动的挡块35。所述摄像头30为CCD摄像头。 A further feature of the detection machine of the present invention is that the support seat 292 is located on the X-direction beam, and 2-5 compression cylinders 23 are installed on each steel mesh support plate 22, and the compression cylinders 23 are controlled by a pneumatic reversing valve 27. There are 3 said compression cylinders 23 in the embodiment. There is a connection neck 311 between the instrument panel of the tensiometer 31 used in the embodiment and the test seat, the tensiometer lifting adjustment assembly 38 also includes an arc clamping part 32, and the tensiometer connection block 37 is clamped by the arc clamping part 32 The neck 311 is connected, and the tensiometer 31 can be clamped and moved vertically by the tensiometer lifting adjustment assembly 38. The radius of the arc clamping part 32 is greater than the radius of the connecting neck 311. When the arc clamping part 32 clamps the tensiometer 31 and descends After contacting with the steel net to be tested, the tension meter 31 and the tensiometer lifting adjustment assembly 38 will have no interaction force if the tension meter 31 continues to descend slightly. The connecting block 37 also has a stopper 35 that prevents the tensiometer 31 from laterally swinging during lifting and transporting. The camera 30 is a CCD camera.
本发明检测机的进一步特征是Y向丝杠16位于两个Y向导轨中间，且所述Y轴伺服电机111安装在底座12下表面，并通过同步带驱动Y向丝杠16旋转。 A further feature of the detection machine of the present invention is that the Y-direction screw 16 is located between the two Y-guiding rails, and the Y-axis servo motor 111 is installed on the lower surface of the base 12, and drives the Y-direction screw 16 to rotate through a synchronous belt.
本发明检测机对钢网进行自动检测时，包括以下步骤： When detecting machine of the present invention carries out automatic detection to stencil, comprise the following steps:
1）待检测钢网压紧 1) The steel mesh to be tested is compacted
调节活动支架28与固定水平支架291的距离至待检测钢网两侧均能被压紧气缸23固定在钢网支撑板上22后锁紧钢网调节导轨25的滑块，放入待检测钢网，启动压紧气缸23将钢网压紧固定在钢网支撑板22上。 Adjust the distance between the movable support 28 and the fixed horizontal support 291 until both sides of the steel mesh to be detected can be pressed by the cylinder 23 and fixed on the steel mesh support plate 22, and then lock the slide block of the steel mesh adjustment guide rail 25, and put the steel mesh to be detected. Net, start compression cylinder 23 and steel net is compressed and fixed on the steel net support plate 22.
2）自动检测 2) Automatic detection
2.1）图像检测 2.1) Image detection
旋转X、Y向丝杠，调节X向滑台和Y向滑台15的位置，带动检测机构的摄像头30对待检测钢网进行图像数据采集，采集过程中X、Y向光栅尺会对摄像头30位置进行反馈，图像数据采集完成可采用计算机将采集到的数据与标准图像进行比对，以检测钢网的开孔面积，位置及外观可见的缺陷。 Rotate the X, Y direction lead screw, adjust the position of the X direction slide table and the Y direction slide table 15, and drive the camera 30 of the detection mechanism to collect image data of the steel mesh to be detected. After the image data is collected, the computer can be used to compare the collected data with the standard image to detect the opening area, position and appearance of the stencil.
2.2）张力检测 2.2) Tension detection
旋转X、Y向丝杠，调节X向滑台和Y向滑台15的位置至预定的待测钢网的张力检测位置上方，启动张力计升降调节组件38将张力计31的测试座置于待检测钢网的张力检测位置上进行张力检测，记录张力检测数据，完成整个检测步骤。 Rotate the X and Y direction lead screws, adjust the positions of the X direction slide table and the Y direction slide table 15 to above the predetermined tension detection position of the stencil to be tested, start the tensiometer lifting adjustment assembly 38 and place the test seat of the tensiometer 31 on the Perform tension detection at the tension detection position of the stencil to be detected, record the tension detection data, and complete the entire detection process.
实验表明，本发明设计的检测机结构简单，自动化程度高，操作简便，检测精度可达±5μm，对于网框尺寸为736mmX736mm的标准单张钢网，检测只需四分钟，检测效率也大为提高。 Experiments show that the detection machine designed by the present invention is simple in structure, high in automation, easy to operate, and the detection accuracy can reach ±5 μm. For a standard single steel mesh with a screen frame size of 736mmX736mm, it only takes four minutes to detect, and the detection efficiency is also greatly improved. improve.
本发明未述及之处适用于公知技术。 The unmentioned parts of the present invention are applicable to the known technology.
以上对本发明的实施进行了详细说明，但所述内容为本发明的较佳实施过程，不能被认为用于限定本申请权利要求的保护范围。凡以本发明申请权利要求范围所做的均等变化与改进，均应归属于本申请权利要求的保护范围之内。 The implementation of the present invention has been described in detail above, but the content described is a preferred implementation process of the present invention, and should not be considered as limiting the protection scope of the claims of the present application. All equivalent changes and improvements made within the scope of the claims of the present application shall belong to the scope of protection of the claims of the present application.
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