A high-precision fine-adjustment mechanism for MLCC stacking

Abstract

The present invention belongs to the technical field of MLCC stacking production and discloses a high-precision fine-adjustment mechanism for MLCC stacking alignment, comprising a stacking upper plate, both ends of the top of the stacking upper plate being fixedly mounted with a Y-axis adjustment mechanism, an induction plate fixedly connected to the top of the stacking upper plate being provided above the Y-axis adjustment mechanism, an adsorption rotating upper plate being fixedly mounted in the middle of the top of the stacking upper plate, a Z-axis adjustment mechanism being fixedly mounted on the top of the adsorption rotating upper plate, and a vent pipe joint being fixedly mounted at both ends of the top of the Z-axis adjustment mechanism. The stacking alignment of the present invention adopts a high-precision fine-adjustment mechanism, which eliminates the gap in the entire mechanism through the adjustment of double-layer X- and Y-axis ball screws, adopts an axial zero-clearance screw, and utilizes synchronous coupling control of a servo motor to improve adjustment accuracy and achieve a repeatable positioning accuracy of up to 1 μm.

Description

Technical Field

[0001] The present invention belongs to the technical field of MLCC stacking production, and in particular is a high-precision fine-adjustment mechanism for MLCC stacking alignment. Background Art

[0002] MLCC is the abbreviation of chip multilayer ceramic capacitor. It is composed of ceramic dielectric diaphragms with printed electrodes (inner electrodes) stacked in a staggered manner, that is, in a stacked manner. After a one-time high-temperature sintering, a ceramic chip is formed. A metal layer (outer electrode) is then sealed at both ends of the chip to form a structure similar to a monolithic stone, so it is also called a monolithic capacitor.

[0003] Traditional stacking alignment mechanisms typically consist of two components: a ball screw drives the suction head for alignment compensation in the X direction, while a servo motor drives the mold for adjustment in the Y and θ directions. The Y direction is driven by a ball screw, while the θ direction is driven by a worm gear or rotating gear. Because the position parameters determined by CCD vision are decomposed between the suction head and the mold, the X-direction suction head is heavy and has a long oscillation period during high-speed displacement, resulting in low overall efficiency. In traditional stacking alignment, whether the θ axis uses a worm gear or rotating gear, the inherent backlash of the θ axis makes it difficult to eliminate the gaps generated by the forward and reverse rotation of the mold due to the inherent backlash. This affects the alignment accuracy during stacking, and thus the quality of the capacitors, necessitating improvements. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In order to solve the problems raised in the above background technology, the present invention provides a high-precision fine-adjustment mechanism for MLCC stacking alignment. The high-precision fine-adjustment mechanism is adopted for stacking alignment. Through the adjustment of double-layer X- and Y-direction ball screws, an axial zero-gap screw is adopted, and the synchronous coupling control of the servo motor is utilized to eliminate the gap in the entire mechanism, improve the adjustment accuracy, and the repeated positioning accuracy can reach 1um, which has the advantage of precise positioning and alignment.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-precision fine-adjustment mechanism for MLCC stacking, comprising a stacking upper plate, both ends of the top of the stacking upper plate are fixedly installed with Y-axis adjustment mechanisms, and a sensing plate fixedly connected to the top of the stacking upper plate is provided above the Y-axis adjustment mechanism; an adsorption rotating upper plate is fixedly installed in the middle of the top of the stacking upper plate, and a Z-axis adjustment mechanism is fixedly installed on the top of the adsorption rotating upper plate, and a vent pipe joint is fixedly installed at both ends of the top of the Z-axis adjustment mechanism; cross-roller bearings are fixedly installed at the four corners of the top of the adsorption rotating upper plate, the outer edge of the Z-axis adjustment mechanism is fixedly connected to a sensor, and the bottoms of the two diagonal cross-roller bearings are respectively fixedly installed with X-axis adjustment mechanisms and guide components, the bottom of the stacking upper plate is fixedly installed with a rotating lower fixed plate, one end of the rotating lower fixed plate is fixedly installed with an air pressure sensor, and the bottom of the rotating lower fixed plate is fixedly installed with an adsorption component.

[0008] In the above technical solution, preferably, the Y-axis adjustment mechanism includes a Y-axis adjustment servo motor fixedly connected to the stacked upper plate, one end of the Y-axis adjustment servo motor is fixedly installed with a Y-axis adjustment screw assembly, and the top of the Y-axis adjustment screw assembly is fixedly connected to the cross roller bearing.

[0009] In the above technical solution, preferably, the Z-axis adjustment mechanism includes a Z-axis guide spline shaft fixedly connected to the top of the adsorption rotating upper top plate, the top of the Z-axis guide spline shaft is fixedly connected to the Z-axis spline shaft upper fixed plate, and the two sides of the Z-axis spline shaft upper fixed plate are respectively fixedly connected to the Z-axis auxiliary guide spline shaft and the Z-axis auxiliary guide spline shaft fixedly connected to the adsorption rotating upper top plate, the Z-axis servo motor is fixedly installed in the middle of the top of the Z-axis spline shaft upper fixed plate, and the Z-axis screw assembly is fixedly installed in the middle of the bottom of the Z-axis spline shaft upper fixed plate.

[0010] In the above technical solution, preferably, the X-axis adjustment mechanism includes an X-axis servo motor fixedly connected to the top of the stacked upper plate, the output shaft of the X-axis servo motor is fixedly connected to the X-axis screw assembly, and the top of the X-axis screw assembly is fixedly connected to two diagonal cross roller bearings.

[0011] In the above technical solution, preferably, the guide assembly includes a slide rail positioning block fixedly connected to the top of the stacked upper plate, a linear slide rail is fixedly installed on the top of the slide rail positioning block, an XY integrated slider connecting seat is fixedly installed on the top of the linear slide rail, and the top of the XY integrated slider connecting seat is fixedly connected to the other two cross roller bearings at the opposite diagonal position.

[0012] In the above technical solution, preferably, the adsorption assembly includes an insulation plate fixedly connected to the bottom of the rotating lower fixed plate, a heating plate is fixedly installed on the bottom of the insulation plate, and an adsorption plate is fixedly installed on the bottom of the heating plate, and the adsorption plate adsorbs the diaphragm.

[0013] (3) Beneficial effects

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The stacking alignment of the present invention adopts a high-precision fine-tuning mechanism. Through the adjustment of the double-layer X- and Y-direction ball screws, an axial zero-gap screw is used, and the synchronous coupling control of the servo motor is utilized to eliminate the gap in the entire mechanism, improve the adjustment accuracy, and achieve a repeat positioning accuracy of up to 1um.

[0016] The stacking alignment of the present invention is adjusted by driving the lead screws with four servo motors on two layers, converting the position parameters given by the CCD vision into X and Y adjustment parameters. The lead screws are pushed and pulled by the motors, and the adsorption components are driven for alignment using high-precision cross-roller bearings, thereby improving the dynamic response speed. The θ parameter is directly divided into X and Y, and the adsorption head is aligned in advance to achieve peeling and stacking, thereby improving equipment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is an X-direction front view of the present invention;

[0019] Figure 3 It is a Y-direction local structure front view of the present invention;

[0020] Figure 4 It is a sectional view of the local structure along the Y direction of the present invention.

[0021] In the figure: 1. Stacking upper plate; 2. Y-axis adjustment mechanism; 201. Y-axis adjustment screw assembly; 202. Y-axis adjustment servo motor; 3. Induction plate; 4. Cross roller bearing; 5. Adsorption rotating upper plate; 6. Z-axis adjustment mechanism; 601. Z-axis guide spline shaft; 602. Z-axis spline shaft upper fixing plate; 603. Z-axis auxiliary guide spline shaft; 604. Z-axis servo motor; 605. Z-axis auxiliary guide spline shaft; 60 6. Z-axis screw assembly; 7. Ventilation pipe joint; 8. Sensor; 9. X-axis adjustment mechanism; 901. X-axis screw assembly; 902. X-axis servo motor; 10. Guide assembly; 101. Slide rail positioning block; 102. Linear slide rail; 103. XY integrated slider connector; 11. Rotating lower fixing plate; 12. Air pressure sensor; 13. Adsorption assembly; 131. Heat insulation plate; 132. Heating plate; 133. Adsorption plate. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] like Figures 1 to 4 As shown, the present invention provides a high-precision fine-adjustment mechanism for MLCC stacking, comprising a stacking upper plate 1, both ends of the top of the stacking upper plate 1 are fixedly installed with a Y-direction adjustment mechanism 2, a sensor plate 3 fixedly connected to the top of the stacking upper plate 1 is provided above the Y-direction adjustment mechanism 2, an adsorption rotating upper top plate 5 is fixedly installed in the middle of the top of the stacking upper plate 1, a Z-direction adjustment mechanism 6 is fixedly installed on the top of the adsorption rotating upper top plate 5, both ends of the top of the Z-direction adjustment mechanism 6 are fixedly installed with a vent pipe joint 7, cross roller bearings 4 are fixedly installed at the four corners of the top of the adsorption rotating upper top plate 5, an outer edge of the Z-direction adjustment mechanism 6 is fixedly connected with a sensor 8, an X-direction adjustment mechanism 9 and a guide assembly 10 are fixedly installed on the bottom of the two diagonal cross roller bearings 4, a rotating lower fixed plate 11 is fixedly installed on the bottom of the stacking upper plate 1, an air pressure sensor 12 is fixedly installed on one end of the rotating lower fixed plate 11, and an adsorption assembly 13 is fixedly installed on the bottom of the rotating lower fixed plate 11;

[0024] The above scheme is adopted: the entire structure is fixedly supported by the stacking upper plate 1, while bearing the pressure brought by the stacking. The X-direction position adjustment is achieved through the Y-direction adjustment mechanism 2, the Z-direction position adjustment is achieved through the Z-direction adjustment mechanism 6, and the X-direction position adjustment is achieved through the X-direction adjustment mechanism 9. The sensor plate 3 is used to detect the limit position and origin position of the X and Y directions. The cross roller bearing 4 is used to support the X and Y guide rails of the Y-direction adjustment mechanism 2 and the Z-direction adjustment mechanism 6. At the same time, the position of the adsorption component 13 is adjusted by adjusting each of the four groups of bearings. The adsorption rotating upper top plate 5 is used to fix and support the Z-direction adjustment mechanism 6. The vent pipe joint 7 is used for ventilation of vacuum and compressed air of the adsorption plate 133. The sensor 8 is used to sense the operation position signal of the X, Y and Z servo motors. The guide assembly 10 is used for positioning and guiding adjustment in the X and Y directions. The rotating lower fixed plate 11 is used for fixed support of the adsorption assembly 13. The air pressure sensor 12 is used to detect the vacuum pressure of vacuum adsorption. The adsorption assembly 13 is used to adsorb the diaphragm. Therefore, through the cooperation of the above structures, the gap of the mechanism is eliminated and the accuracy is improved.

[0025] like Figure 1As shown, the Y-axis adjustment mechanism 2 includes a Y-axis adjustment servo motor 202 fixedly connected to the laminated upper plate 1, one end of the Y-axis adjustment servo motor 202 is fixedly mounted with a Y-axis adjustment screw assembly 201, and the top of the Y-axis adjustment screw assembly 201 is fixedly connected to the cross roller bearing 4;

[0026] The above scheme is adopted: a total of two sets of Y-axis adjustment screw assemblies 201 are set, both of which are high-precision zero axial clearance ball screws, which can realize the precise adjustment of the Y-axis adsorption assembly and the coordinated adjustment of the θ angle. The Y-axis adjustment servo motor 202 has a total of two sets of absolute value high-precision servo motors, which control the motor through the coupling synchronization algorithm to adjust the position of the adsorption assembly.

[0027] like Figure 1 、 Figure 2 、 Figure 3 As shown, the Z-direction adjustment mechanism 6 includes a Z-direction guide spline shaft 601 fixedly connected to the top of the adsorption rotating upper top plate 5, the top of the Z-direction guide spline shaft 601 is fixedly connected to a Z-direction spline shaft upper fixed plate 602, and both sides of the Z-direction spline shaft upper fixed plate 602 are respectively fixedly connected to a Z-direction auxiliary guide spline shaft 603 and a Z-axis auxiliary guide spline shaft 605 fixedly connected to the adsorption rotating upper top plate 5, a Z-axis servo motor 604 is fixedly installed in the middle of the top of the Z-direction spline shaft upper fixed plate 602, and a Z-axis screw assembly 606 is fixedly installed in the middle of the bottom of the Z-direction spline shaft upper fixed plate 602;

[0028] The above scheme is adopted: two sets of Z-direction guide spline shafts 601 are used to adjust the Z-direction position of the adsorption component 13, the fixed plate 602 on the Z-direction spline shaft is used to fix the Z-direction guide spline shaft 601, the Z-direction auxiliary guide spline shaft 603, the Z-axis auxiliary guide spline shaft 605 and the Z-axis servo motor 604, the Z-direction auxiliary guide spline shaft 603 is used for the auxiliary guiding function of the adsorption component 13, the Z-axis servo motor 604 is used to drive the Z-direction movement of the adsorption component 13, the Z-axis auxiliary guide spline shaft 605 is used for the Z-direction auxiliary guiding of the adsorption component 13, and the Z-axis screw assembly 606 is used for the Z-direction transmission of the adsorption component 13.

[0029] like Figure 1 、 Figure 3 As shown, the X-axis adjustment mechanism 9 includes an X-axis servo motor 902 fixedly connected to the top of the laminated upper plate 1, the output shaft of the X-axis servo motor 902 is fixedly connected to an X-axis screw assembly 901, and the top of the X-axis screw assembly 901 is fixedly connected to two diagonal cross roller bearings 4;

[0030] The above solution is adopted: the X-axis screw assembly 901 is used for X-direction transmission of the adsorption assembly 13, and the X-axis servo motor 902 has two sets of absolute value high-precision servo motors, which are controlled by a coupling synchronization algorithm to adjust the position of the adsorption assembly 13.

[0031] like Figure 1 、 Figure 3 As shown, the guide assembly 10 includes a slide rail positioning block 101 fixedly connected to the top of the laminated upper plate 1, a linear slide rail 102 fixedly mounted on the top of the slide rail positioning block 101, an XY integrated slider connector 103 fixedly mounted on the top of the linear slide rail 102, and the top of the XY integrated slider connector 103 fixedly connected to two other diagonal cross roller bearings 4;

[0032] The above solution is adopted: the slide rail positioning block 101 is used for positioning the slide rail on all sides to avoid micro-displacement of the slide rail during the adjustment process, which affects the stacking accuracy. The linear slide rail 102 adopts a high-precision pre-loaded slide rail, which is used to guide the adsorption component 13X and Y direction movement adjustment. The XY integrated slider connector 103 is an XY direction integrated slider connector to meet the usage requirements in two directions.

[0033] like Figure 2 、 Figure 3 、 Figure 4 As shown, the adsorption assembly 13 includes a heat insulation plate 131 fixedly connected to the bottom of the rotating lower fixed plate 11, a heating plate 132 is fixedly installed at the bottom of the heat insulation plate 131, and an adsorption plate 133 is fixedly installed at the bottom of the heating plate 132. The adsorption plate 133 adsorbs the diaphragm;

[0034] The above solution is adopted: the heat insulation plate 131 is used to block the heat transfer of the heating plate 132 to prevent the fixed plate 602 on the Z-axis spline shaft from being affected by heat and affecting the accuracy; the heating plate 132 is used to heat the adsorption plate 133; the adsorption plate 133 is used to adsorb and stack the diaphragm to complete the stacking action.

[0035] The working principle and use process of the present invention:

[0036] Adjustment in the X direction: The X-axis servo motor 902 starts to drive the X-axis screw assembly 901 to work, and the guide assembly 10 is limited and connected through a set of diagonal cross roller bearings 4, thereby driving the adsorption and rotation upper top plate 5 and the matching structure above the adsorption and rotation upper top plate 5 to move;

[0037] Adjustment in the Y direction: The Y-direction adjustment servo motor 202 is started to drive the Y-direction adjustment screw assembly 201 to work, and the guide assembly 10 is limited and connected through another set of diagonal cross roller bearings 4, thereby driving the adsorption and rotation upper top plate 5 and the matching structure above the adsorption and rotation upper top plate 5 to move;

[0038] Adjustment in the Z direction: The Z-axis servo motor 604 starts to drive the Z-direction guide spline shaft 601 to move, and the Z-axis screw assembly 606 performs transmission to achieve Z-direction adjustment. At the same time, the fixed plate 602 on the Z-direction spline shaft limits the overall structure, and the Z-direction auxiliary guide spline shaft 603 and the Z-axis auxiliary guide spline shaft 605 guide when the adsorption assembly 13 moves;

[0039] When moving in the X and Y directions, the sensor sheet 3 detects the X and Y directions reaching the limit position and the origin position, controls the distance, and sends a signal to the X-axis servo motor 902, the Y-axis adjustment servo motor 202, and the Z-axis servo motor 604 when they are working. The sensor 8 senses the motor's position signal. After it is in place, the vent pipe joint 7 vacuums the adsorption plate 133 to adsorb the diaphragm. The air pressure sensor 12 detects the vacuum pressure. After adsorption, the Y-axis adjustment mechanism 2, the X-axis adjustment mechanism 9, and the Z-axis adjustment mechanism 6 work to move the diaphragm. Then the vent pipe joint 7 vents the adsorption plate 133 to cancel the adsorption of the diaphragm.

[0040] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision fine-adjustment mechanism for MLCC stacking alignment, comprising a stacking upper plate (1), characterized in that: Both ends of the top of the stacked upper plate (1) are fixedly mounted with a Y-direction adjustment mechanism (2), and an induction plate (3) fixedly connected to the top of the stacked upper plate (1) is provided above the Y-direction adjustment mechanism (2). An adsorption rotating upper plate (5) is fixedly mounted in the middle of the top of the stacked upper plate (1), and a Z-direction adjustment mechanism (6) is fixedly mounted on the top of the adsorption rotating upper plate (5). Both ends of the top of the Z-direction adjustment mechanism (6) are fixedly mounted with a vent pipe joint (7). Cross roller bearings (4) are fixedly installed at the four corners, the outer edge of the Z-direction adjustment mechanism (6) is fixedly connected to a sensor (8), the bottoms of the two diagonal cross roller bearings (4) are fixedly installed with an X-direction adjustment mechanism (9) and a guide assembly (10), the bottom of the stacked upper plate (1) is fixedly installed with a rotating lower fixed plate (11), one end of the rotating lower fixed plate (11) is fixedly installed with an air pressure sensor (12), and the bottom of the rotating lower fixed plate (11) is fixedly installed with an adsorption assembly (13).

2. The high-precision fine-adjustment mechanism for MLCC stack alignment according to claim 1, characterized in that: The Y-direction adjustment mechanism (2) comprises a Y-direction adjustment servo motor (202) fixedly connected to the stacked upper plate (1); a Y-direction adjustment screw assembly (201) is fixedly mounted on one end of the Y-direction adjustment servo motor (202); and the top of the Y-direction adjustment screw assembly (201) is fixedly connected to a cross roller bearing (4).

3. The high-precision fine-adjustment mechanism for MLCC stack alignment according to claim 1, characterized in that: The Z-direction adjustment mechanism (6) comprises a Z-direction guide spline shaft (601) fixedly connected to the top of the adsorption rotating upper top plate (5); the top of the Z-direction guide spline shaft (601) is fixedly connected to a Z-direction spline shaft upper fixed plate (602); two sides of the Z-direction spline shaft upper fixed plate (602) are respectively fixedly connected to a Z-direction auxiliary guide spline shaft (603) and a Z-axis auxiliary guide spline shaft (605) fixedly connected to the adsorption rotating upper top plate (5); a Z-axis servo motor (604) is fixedly installed in the middle of the top of the Z-direction spline shaft upper fixed plate (602); and a Z-axis screw rod assembly (606) is fixedly installed in the middle of the bottom of the Z-direction spline shaft upper fixed plate (602).

4. The high-precision fine-adjustment mechanism for MLCC stack alignment according to claim 1, characterized in that: The X-axis adjustment mechanism (9) comprises an X-axis servo motor (902) fixedly connected to the top of the stacked upper plate (1); an output shaft of the X-axis servo motor (902) is fixedly connected to an X-axis screw assembly (901); and a top of the X-axis screw assembly (901) is fixedly connected to two diagonally opposite cross roller bearings (4).

5. The high-precision fine-adjustment mechanism for MLCC stack alignment according to claim 1, characterized in that: The guide assembly (10) comprises a slide rail positioning block (101) fixedly connected to the top of the stacked upper plate (1), a linear slide rail (102) fixedly mounted on the top of the slide rail positioning block (101), an XY integrated slider connection seat (103) fixedly mounted on the top of the linear slide rail (102), and the top of the XY integrated slider connection seat (103) fixedly connected to two other diagonally opposite cross roller bearings (4).

6. The high-precision fine-adjustment mechanism for MLCC stack alignment according to claim 1, characterized in that: The adsorption assembly (13) comprises a heat insulation plate (131) fixedly connected to the bottom of the rotating lower fixed plate (11); a heating plate (132) is fixedly mounted on the bottom of the heat insulation plate (131); an adsorption plate (133) is fixedly mounted on the bottom of the heating plate (132); and the adsorption plate (133) adsorbs the diaphragm.

Images