CN115866894B - Automatic clamp for PCB and working method thereof - Google Patents
Automatic clamp for PCB and working method thereof Download PDFInfo
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- CN115866894B CN115866894B CN202211510275.0A CN202211510275A CN115866894B CN 115866894 B CN115866894 B CN 115866894B CN 202211510275 A CN202211510275 A CN 202211510275A CN 115866894 B CN115866894 B CN 115866894B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention belongs to the technical field of automatic equipment, and particularly relates to a PC B board automatic clamp, which comprises a clamp support and a positioning auxiliary assembly, wherein the positioning auxiliary assembly comprises a positioning ring and a limiting mechanism; the limiting mechanism comprises a correcting part, two groups of linkage parts and a bearing part, the main body of the correcting part is of a columnar structure, the correcting part is uniformly arranged on the upper surface of the bearing part, the correcting part is a column body capable of being adjusted in a lifting manner, the inside of the columnar structure is communicated with a temperature adjusting oil pipe, and the upper surface of the correcting part is provided with a sensor which comprises a temperature sensor and a distance sensor; the top of the clamp is provided with a pressure piece, and the pressure piece is connected with the clamp support through a rotary lifting shaft. Set up correction portion in anchor clamps, under the centre gripping of anchor clamps, according to correction portion's distance sensor, can accurately judge whether PC B board takes place to warp, through temperature sensor's monitoring, under correction portion and pressure piece's cooperation effect, carry out quick high-efficient correction to the PC B board of warp.
Description
Technical Field
The invention belongs to the technical field of automatic equipment, and particularly relates to an automatic clamp for a PCB and a working method of the automatic clamp.
Background
PCB (Printed Circuit Board) the Chinese name printed circuit board, also called printed circuit board, is an important electronic component, is a support for electronic components, and is a carrier for electrical connection of electronic components. It is called a "printed" circuit board because it is made using electronic printing.
The PCB consists of copper foil, resin, glass cloth and other materials, the physical and chemical properties of the materials are different, and thermal stress residues are necessarily generated after the materials are pressed together, so that the materials are deformed; meanwhile, in the processing process of the PCB, various processes such as high temperature, mechanical cutting and wet treatment can be carried out, and the deformation of the board is also influenced, so that in a word, the deformation of the PCB can be caused due to various complicated reasons, the deformation caused by different material characteristics or processing can be reduced or eliminated, the deformation becomes one of the complicated problems in the PCB manufacturing process, the influence of the warping of the circuit board on the manufacturing of the printed circuit board is very large, the board provided with components is bent after being welded, and the assembly pins are difficult to be tidy.
At present, the number of layers of a circuit board is designed, so that the adoption of singular layers is avoided, or the circuit patterns on two sides of the circuit board are coordinated as consistent as possible, or the warp deformation of the PCB board is eliminated in various modes such as hot-pressing, cold-pressing, drying and the like. However, in the above-mentioned manner, the correction of warp deformation is aimed at the whole circuit board, and the correction efficiency is low and not accurate enough.
Disclosure of Invention
In view of the above problems, the present invention provides a jig capable of accurately correcting warpage of a circuit board.
Specifically, the invention provides an automatic clamp for a PCB, which comprises a clamp support and a positioning auxiliary assembly;
the top end of the clamp support is rotationally connected with a hollow rotary table, the top end of the hollow rotary table is fixedly connected with a pneumatic finger, the bottom end of the positioning auxiliary assembly is in transmission connection with the top output end of the pneumatic finger, the top end of the positioning auxiliary assembly is movably clamped with a PCB, the bottom end of the clamp support is fixedly connected with a bottom plate, one side of the bottom end of the bottom plate is fixedly connected with a motor, the output end of the motor penetrates through the clamp support and extends to the bottom end of the hollow rotary table to be in transmission connection, the top end of the bottom plate is provided with an air inlet pipe and an air outlet pipe, and the air inlet pipe and the air outlet pipe are both communicated with the pneumatic finger;
the positioning auxiliary assembly comprises a positioning ring and a limiting mechanism; the limiting mechanism comprises a correcting part, two groups of linkage parts and a bearing part, the main body of the correcting part is of a columnar structure, the correcting part is uniformly arranged on the upper surface of the bearing part, the correcting part is of a column body capable of being adjusted in a lifting manner, the inside of the columnar structure is communicated with a temperature adjusting oil pipe, the temperature adjusting oil pipe comprises a temperature adjusting oil inlet pipe and a temperature adjusting oil outlet pipe, a heating piece is arranged in the temperature adjusting oil inlet pipe, and a sensor is arranged on the upper surface of the correcting part and comprises a temperature sensor and a distance sensor;
the top of anchor clamps sets up the pressure spare, and the pressure spare passes through rotatory lift axle in the anchor clamps support and connects, and the shape of pressure spare suits with the inboard profile of holding ring for the pressure spare can match with the inboard of holding ring.
Further, two groups of guide sliding grooves are formed in the inner wall of the positioning ring, the two groups of guide sliding grooves are symmetrically arranged by taking the central axis of the positioning ring as a center, the depth of the guide sliding grooves is the same as that of the positioning ring, the limiting mechanism is arranged on the inner side of the positioning ring, and two ends, close to the guide sliding grooves, of the limiting mechanism are slidably connected to the inner wall of the guide sliding groove.
Further, two groups of one ends of the linkage parts are fixedly connected to the bottom lower surface of the bearing part, the two groups of the linkage parts are symmetrically arranged by taking the central axis of the bearing part as the center, and the two groups of the linkage parts are slidably connected to the bottom lower surface of the bearing part.
Further, the correction portion covers the entire surface of the bearing portion.
Further, the top of the correcting part columnar structure is a plane, and the bottom of the columnar structure is fixed on the upper surface of the bearing part.
Further, the columnar structure is a triangular prism, and the top of the columnar structure is triangular.
Further, the linkage part comprises a shell; a side wall of the shell penetrates through the first linkage plate in a sliding manner, a spring is arranged between one end of the first linkage plate and the inner wall of the shell, one end of the first linkage plate, which is far away from the spring, is fixedly connected with a second linkage plate, and the joint of the second linkage plate and the first linkage plate is arranged at a right angle.
Further, the top fixedly connected with grip block of second linkage board, the grip block is right trapezoid structure, just the grip block is close to a lateral wall of first linkage board and is inclination setting.
Further, one end of the shell is fixedly connected to the lower portion of the bearing portion, the second linkage plate and the clamping block are both in sliding connection with the inner wall of the guide chute, and the bottom end of the second linkage plate is connected with the output end of the pneumatic finger.
According to the working method of the PC B board automatic clamp, after the PC B board is placed on the clamp, whether the PCB board is warped or not and the specific warping position are judged by the signal controller based on the distance sensor according to the detection signals of the distance sensor and the temperature sensor on the correction part;
when the distance detected by a certain distance sensor is different from the distance detected by most of the distance sensors, determining that the PC B board is warped and the PC B board at the position of the distance sensor is warped;
correcting the PC B plate which is warped, adjusting a pressure piece to enable the pressure piece to be positive-pressure on the upper surface of the PC B plate, enabling the top of the columnar structure of the correction part to be in contact with the lower surface of the PC B plate on the clamp, determining the distance between the PC B plate and the correction part according to a detection signal of a distance sensor on the correction part, and adjusting the height of the columnar structure of the correction part to enable the top of the correction part to be in contact with the PC B plate; according to detection signals of a distance sensor and a temperature sensor on the correction part, the temperature of the temperature-adjusting oil inlet pipe is adjusted, the temperature of the temperature-adjusting oil inlet pipe corresponding to the warping part is higher than that of the non-warping part, the stress of the warping part is gradually relaxed after being heated, the warping deformed part is restored to be flat under the action of the pressure piece, the heights of all the correction parts are consistent at the moment, the temperature of the temperature-adjusting oil inlet pipe corresponding to the warping part is adjusted to be consistent with that of the non-warping part after that, the whole PC B board is continuously heated for a period of time, and the whole PC B board is flat under the action of the pressure piece;
when the distances detected by all the distance sensors are the same, namely the PC B board is not warped, the whole PC B board is flat;
and moving the flat PCB to any circumferential position so as to facilitate subsequent automatic operation.
The beneficial effects of the invention are as follows:
1. the correction part is arranged in the clamp, and under the clamping of the clamp, whether the PC B board is warped or not can be accurately judged according to the distance sensor of the correction part, and the warped PC B board is quickly and efficiently corrected under the cooperation of the correction part and the pressure piece through the monitoring of the temperature sensor; the columnar structure of the correction part is triangular, the tops of the columnar structure are triangular, the tops of a plurality of triangular prisms which are adjacently arranged can form a plane without gaps, the top surface of each triangular prism is triangular, the size of a contact surface between the correction part and the PC B plate can be flexibly adjusted, and the heated aiming position can be accurately adjusted, so that the warping position can be accurately corrected; the PC B board is heated by oil liquid in the correction part, so that the PC B board is heated uniformly, and secondary warping caused by uneven heating of the PCB board is avoided.
2. The two ends of the guide sliding grooves are used for being connected with the inner walls of the limiting mechanism in a sliding manner, the top output ends of the pneumatic fingers are used as power sources, the two ends of the limiting mechanism are flexibly controlled to be connected with the inner walls of the guide sliding grooves in a reciprocating sliding manner, the PC B plate is used for rapidly positioning and clamping, the output ends of the motors drive the rotor of the hollow rotary table to rotate, the pneumatic fingers fixedly connected with the hollow rotary table synchronously rotate, the rotating angle of the PC B plate is precisely controlled, the air inlet and outlet pipelines with the pneumatic sliding rings in transition rotation are adopted, the pipeline interference can be avoided, other automatic operations are facilitated, and the reciprocating use stability of the automatic clamp is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a schematic structural view of an automated clamp according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a positioning aid assembly according to an embodiment of the invention;
FIG. 3 is a schematic view showing the structure of a limiting mechanism and a correcting portion according to an embodiment of the present invention;
FIG. 4 is a schematic view showing the structure of a linkage part according to an embodiment of the present invention;
fig. 5 shows a top view of a correction portion according to an embodiment of the present invention.
In the figure: 1. a clamp support; 2. a hollow turntable; 3. pneumatic fingers; 4. positioning an auxiliary tool assembly; 4 1. A positioning ring; 4 2. A guide chute; 4 3. A limiting mechanism; 431, a correction part; 432, a linkage part; 4321, a shell; 4322, a first linkage plate; 4323, a second linkage plate; 4324, clamping blocks; 433, a bearing part; 5. a PC B board; 6. a bottom plate; 7. a motor; 8. an air inlet pipe; 9. an air outlet pipe; 10. a pressure member; 11. the lifting shaft is rotated.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a PC B board automatic clamp, which comprises a clamp support 1 and a positioning auxiliary assembly 4; as illustrated by way of example in fig. 1.
The top of anchor clamps support 1 rotates and is connected with cavity revolving stage 2, the top fixedly connected with pneumatic finger 3 of cavity revolving stage 2, the bottom of location assistance utensil subassembly 4 is connected with pneumatic finger 3's top output transmission, just the top activity joint of location assistance utensil subassembly 4 has PC B board 5, the bottom fixedly connected with bottom plate 6 of anchor clamps support 1, bottom one side fixedly connected with motor 7 of bottom plate 6, the output of motor 7 runs through anchor clamps support 1, and extends to cavity revolving stage 2's bottom transmission and connect, the top of bottom plate 6 is provided with intake pipe 8 and outlet duct 9, just intake pipe 8 and outlet duct 9 all are linked together with pneumatic finger 3.
Furthermore, electromagnetic valves are arranged on the air inlet pipe 8 and the air outlet pipe 9, and the electromagnetic valves are embedded and installed on the inner walls of the air inlet pipe 8 and the air outlet pipe 9.
Specifically, the output end of the pneumatic finger 3 is in transmission connection with the positioning auxiliary assembly 4, so that the positioning auxiliary assembly 4 clamps and fixes the two side walls of the PC B board 5, and the electromagnetic valves in the air inlet pipe 8 and the air outlet pipe 9 are used for opening or closing alternately, so that the positioning auxiliary assembly 4 clamps or loosens the PCB board 5.
The output end of the motor 7 drives the hollow rotary table 2 to rotate, the pneumatic finger 3 fixedly connected to the hollow rotary table 2 synchronously rotates, the rotating angle of the PC B plate 5 is accurately controlled, the pneumatic slip ring is arranged between the air inlet pipe 8 and the air outlet pipe 9 and the pneumatic finger 3, the air inlet pipe 8 is communicated with an air inlet channel of the pneumatic slip ring, the air outlet pipe 9 is communicated with an air outlet channel of the pneumatic slip ring, the air inlet channel of the pneumatic slip ring is communicated with an air inlet channel of the pneumatic finger 3, the air outlet channel of the pneumatic slip ring is communicated with an air outlet channel of the pneumatic finger 3, and an air inlet and outlet pipeline formed by the pneumatic slip ring is adopted, so that pipeline interference can be avoided, and other automatic operations can be facilitated.
The top of anchor clamps sets up pressure spare 10, and pressure spare 10 is connected through rotatory lift axle 11 in anchor clamps support 1, and the shape of pressure spare 10 is suitable for the inboard profile of holding ring 41 for pressure spare 10 can match with the inboard of holding ring 41, and pressure spare 10 malleats on PC B board 5, exerts pressure to PC B board 5.
The PC B board 5 falling into the positioning auxiliary assembly 4 is supported and clamped, and then the flatness of the PCB board 5 is adjusted.
The positioning auxiliary assembly 4 comprises a positioning ring 41 and a limiting mechanism 4 3; as illustrated by way of example in fig. 2.
Two groups of guide sliding grooves 42 are formed in the inner wall of the positioning ring 41, the two groups of guide sliding grooves 42 are symmetrically arranged by taking the central axis of the positioning ring 41 as the center, the two groups of guide sliding grooves 42 are the same in depth as the positioning ring 41, the limiting mechanism 43 is arranged on the inner side of the positioning ring 41, two ends, close to the guide sliding grooves 42, of the limiting mechanism 43 are slidably connected to the inner wall of the guide sliding groove 42, and two ends, close to the guide sliding groove 42, of the limiting mechanism 43 are connected with pneumatic fingers 3.
Specifically, the limiting mechanism 43 is fixedly connected to the inner wall of the positioning ring 41, and the limiting mechanism 43 and the inner wall of the positioning ring 41 form a cavity for placing the PC B board 5, so that the PC B board 5 can be placed in the positioning ring 41 in a horizontal state for further clamping operation;
the two groups of guide sliding grooves 42 are used for accommodating sliding structures at two ends of the limiting mechanism 43, and the sliding structures at two ends of the limiting mechanism 43 are flexibly controlled to be connected to the inner wall of the guide sliding groove 42 in a reciprocating sliding manner by using the pneumatic finger 3 as a power source, so as to rapidly clamp and position the PCB 5.
The limiting mechanism 43 includes a correcting portion 431, two sets of linkage portions 432 and a carrying portion 43 3; as illustrated in fig. 3-4.
One end of each of the two groups of linkage parts 432 is fixedly connected to the bottom lower surface of the bearing part 433, the two groups of linkage parts 432 are symmetrically arranged with the central axis of the bearing part 43 as the center, and the two groups of linkage parts 432 are slidably connected to the bottom lower surfaces of the two groups of bearing parts 433.
The main body of the correction portion 431 is in a columnar structure, the correction portion 431 is uniformly disposed on the upper surface of the bearing portion 433, and preferably, the correction portion 431 covers the whole surface of the bearing portion 433, so that the coverage area of the correction portion 431 is larger. The correcting part 431 is of a columnar structure, the top of the columnar structure is a plane, and the bottom of the columnar structure is fixed on the upper surface of the bearing part 43; the upper surface of the correction portion 431 is provided with a sensor including a temperature sensor that detects the temperature of the contact portion of the PC B board 5 with the correction portion and a distance sensor that detects the distance between the PC B board and the correction portion 43 1.
The columnar structure of the correction portion 431 is a column body capable of being adjusted in a lifting manner, the columnar structure is internally communicated with a temperature adjusting oil pipe, the temperature adjusting oil pipe comprises a temperature adjusting oil inlet pipe and a temperature adjusting oil outlet pipe, a heating element, such as a heating coil, is arranged in the temperature adjusting oil inlet pipe, and oil in the temperature adjusting oil inlet pipe is heated, so that the oil entering the columnar structure is at a desired temperature value. The temperature-adjusting oil inlet pipe and the temperature-adjusting oil outlet pipe are both connected with an oil pump arranged on the hollow turntable 2, the temperature-adjusting oil inlet pipe is connected with an oil discharge pipe of the oil pump, and the temperature-adjusting oil outlet pipe is connected with an oil return pipe of the oil pump to form circulation of temperature-adjusting oil; further, the oil return pipe of the oil pump is provided with the cooling part, the temperature of the oil flowing back to the oil pump is adjusted to normal temperature through the cooling of the cooling part, and therefore the temperature of the oil discharged by the oil discharge pipe of the oil pump is normal temperature, and the condition that the temperature of the oil entering the temperature-adjusting oil inlet pipe is too high to exceed the required temperature and cannot be effectively adjusted is avoided.
Further, the top of the columnar structure of the correction part 431 is made of a heat conducting material, and has excellent heat conducting performance; preferably, the top of the columnar structure of the correction portion 431 is a flexible member, and a change in oil pressure inside the columnar structure causes a change in the top flexible member, and the oil pressure increases so that the flexible member protrudes from the columnar structure.
Preferably, the columnar structure is a triangular prism, the tops of the columnar structure are triangular, the tops of the triangular prisms which are adjacently arranged can form a plane without gaps, the top surfaces of the triangular prisms are triangular, the size of the contact surface between the correction part 431 and the PC B board 5 can be flexibly adjusted, and the heated target position can be accurately adjusted.
The clamp support 1 is also internally provided with a controller which is in signal connection with the distance sensor, the temperature sensor, the columnar structure of the correction part 431, the heating element in the temperature-adjusting oil inlet pipe and the rotating lifting shaft of the pressure element 10, and the controller adjusts the lifting of the columnar structure, the lifting of the rotating lifting shaft 11 of the pressure element and the temperature of heating oil in the heating element in the temperature-adjusting oil inlet pipe according to the detected results of the distance sensor and the temperature sensor.
When the PC B board is used, the PC B board is placed in the positioning ring 41 of the positioning auxiliary assembly 4, whether the PC B board is warped or not and the specific warping part are judged by the signal controller based on the distance sensor according to the detection signals of the distance sensor and the temperature sensor on the correction part 431, wherein the heights of the distance sensors of all the correction parts 431 are the same in the initial state, the difference exists between the distance detected by a certain distance sensor and the distance detected by most of the distance sensors, and the warping of the PC B board at the position of the distance sensor can be determined; adjusting the pressure piece 10 to enable the pressure piece to be positive-pressed on the upper surface of the PC B plate, enabling the top of the columnar structure of the correction part 431 to be in contact with the lower surface of the PC B plate on the clamp, determining the distance between the PC B plate and the correction part 431 according to the detection signal of the distance sensor on the correction part 431, and adjusting the height of the columnar structure of the correction part to enable the top of the correction part 431 to be in contact with the PC B plate; according to the detection signals of the distance sensor and the temperature sensor on the correction part 431, the temperature of the temperature-adjusting oil inlet pipe is adjusted, the temperature of the temperature-adjusting oil inlet pipe corresponding to the warping part is higher than that of the non-warping part, the stress of the warping part is gradually relaxed after being heated, the warping deformed part is restored to be flat under the action of the pressure piece, the heights of all the correction parts 431 are consistent at the moment, the temperature of the temperature-adjusting oil inlet pipe corresponding to the warping part is consistent with that of the non-warping part after that, the whole PC B board is continuously heated for a period of time, and the PC B board is smooth under the action of the pressure piece. Under the centre gripping of anchor clamps, PC B board that can high efficiency correction warp makes PC B board be heated evenly through fluid heating PC B board, has avoided the secondary warpage that is heated unevenly and arouses.
The linkage 432 includes a housing 4321; as illustrated by way of example in fig. 4.
A first linkage plate 4322 is connected to one side wall of the shell 4321 in a penetrating and sliding manner, a spring is arranged between one end of the first linkage plate 4322 and the inner wall of the shell 4321, one end of the first linkage plate 4322, which is far away from the spring, is fixedly connected with a second linkage plate 4323, the connection part of the second linkage plate 4323 and the first linkage plate 4322 is arranged at a right angle, the top end of the second linkage plate 4323 is fixedly connected with a clamping block 4324, the clamping block 4324 is of a right trapezoid structure, the clamping block 4324 is close to one side wall of the first linkage plate 4322 and is arranged at an inclined angle, one end of the shell 4321 is fixedly connected to the lower part of the bearing part 43, the second linkage plate 4323 and the clamping block 4324 are both connected to the inner wall of the guide chute 42 in a sliding manner, and the bottom end of the second linkage plate 4323 is connected with the output end of the pneumatic finger 3.
Specifically, the output end of the pneumatic finger 3 drives the two groups of second linkage plates 4323 to approach each other, so as to synchronously drive the clamping block 4324 to be used for clamping the placed PCB 5;
when the electromagnetic valve in the air outlet pipe 9 is opened, the air outlet pipe 9 is communicated, the output end of the pneumatic finger 3 is in a loosening state, one end of the first linkage plate 4322 is pushed by the tension action of the spring in the shell 4321 to enable the two groups of clamping blocks 4324 to be mutually far away, and the clamping blocks 4324 are prevented from being blocked when being separated from the PCB 5, so that the PCB 5 is taken out conveniently.
The working principle of the automatic clamp for the PCB provided by the embodiment of the invention is as follows:
a cavity for placing the PC B board 5 is formed by the limiting mechanism 43 and the inner wall of the positioning ring 41, so that the PCB board 5 can be placed in the positioning ring 41 for the next clamping operation;
after the PC B board 5 is placed on the jig, the distance sensor-based signal controller determines whether the PC B board is warped or not, and the specific warped portion, based on the detection signals of the distance sensor and the temperature sensor on the correction portion 43 1. When the distance detected by a certain distance sensor is different from the distance detected by most distance sensors, the PC B board at the position of the distance sensor can be determined to warp, and the warped PC B board is corrected; the method comprises the steps of adjusting a pressure piece to enable the pressure piece to be positive-pressure on the upper surface of a PC B plate, enabling the top of a columnar structure of a correction part 431 to contact with the lower surface of the PC B plate on a clamp, determining the distance between the PC B plate and the correction part 431 according to a detection signal of a distance sensor on the correction part 431, and adjusting the height of the columnar structure of the correction part to enable the top of the correction part 431 to contact with the PC B plate; according to the detection signals of the distance sensor and the temperature sensor on the correction part 431, the temperature of the temperature-adjusting oil inlet pipe is adjusted, the temperature of the temperature-adjusting oil inlet pipe corresponding to the warping part is higher than that of the non-warping part, the stress of the warping part is gradually relaxed after being heated, the warping deformed part is restored to be flat under the action of the pressure piece, the heights of all the correction parts 431 are consistent at the moment, the temperature of the temperature-adjusting oil inlet pipe corresponding to the warping part is consistent with that of the non-warping part after that, the whole PC B board is continuously heated for a period of time, and the PC B board is smooth under the action of the pressure piece. Under the centre gripping of anchor clamps, PC B board that can high efficiency correction warp makes PC B board be heated evenly through fluid heating PC B board, has avoided the secondary warpage that is heated unevenly and arouses. When the distances detected by all the distance sensors are the same, the fact that the PCB is not warped can be determined.
The flat PC B plate is moved to any circumferential position so as to facilitate subsequent automatic operation, specifically, the output end of the motor 7 drives the rotor of the hollow rotary table 2 to rotate, the pneumatic fingers 3 fixedly connected to the hollow rotary table 2 synchronously rotate, the rotation angle of the PC B plate 5 is accurately controlled, and the pneumatic slip ring is connected with the air inlet and outlet pipeline, so that pipeline interference caused by rotation can be avoided, and other automatic operations are facilitated;
the solenoid valve in the outlet duct 9 is opened, and outlet duct 9 exhaust gas makes pneumatic finger 3's output be in the state of loosening to utilize the tension effect of the spring in the casing 4321, promote the one end of first linkage board 4322 and make two sets of grip blocks 4324 keep away from each other, be used for preventing grip blocks 4324 and PCB board 5 to appear the dead phenomenon of card when separating, make the getting in-process of PCB board 5 more stable.
Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An automatic anchor clamps of PCB board, its characterized in that: comprises a clamp support (1) and a positioning auxiliary assembly (4);
the clamp comprises a clamp support (1), wherein a hollow rotary table (2) is rotationally connected to the top end of the clamp support (1), a pneumatic finger (3) is fixedly connected to the top end of the hollow rotary table (2), the bottom end of a positioning auxiliary assembly (4) is in transmission connection with the top output end of the pneumatic finger (3), the top end of the positioning auxiliary assembly (4) is movably clamped with a PCB (5), a bottom plate (6) is fixedly connected to the bottom end of the clamp support (1), a motor (7) is fixedly connected to one side of the bottom end of the bottom plate (6), the output end of the motor (7) penetrates through the clamp support (1) and extends to the bottom end of the hollow rotary table (2) to be in transmission connection, an air inlet pipe (8) and an air outlet pipe (9) are arranged at the top end of the bottom plate (6), and the air inlet pipe (8) and the air outlet pipe (9) are communicated with the pneumatic finger (3);
the positioning auxiliary assembly (4) comprises a positioning ring (41) and a limiting mechanism (43); the limiting mechanism (43) comprises a correcting part (431), two groups of linkage parts (432) and a bearing part (433), the main body of the correcting part (431) is of a columnar structure, the correcting part (431) is uniformly arranged on the upper surface of the bearing part (433), the correcting part (431) is a column body capable of being adjusted in a lifting mode, the columnar structure is internally communicated with a temperature adjusting oil pipe, the temperature adjusting oil pipe comprises a temperature adjusting oil inlet pipe and a temperature adjusting oil outlet pipe, a heating element is arranged in the temperature adjusting oil inlet pipe, and a sensor is arranged on the upper surface of the correcting part (431) and comprises a temperature sensor and a distance sensor;
the top of the clamp is provided with a pressure piece (10), the pressure piece is connected with the clamp support (1) through a rotary lifting shaft (11), and the shape of the pressure piece is adapted to the inner side contour of the positioning ring (41), so that the pressure piece can be matched with the inner side of the positioning ring (41).
2. The automated fixture for PCB boards of claim 1, wherein: two sets of guide sliding grooves (42) are formed in the inner wall of the positioning ring (41), the two sets of guide sliding grooves (42) are symmetrically arranged by taking the central axis of the positioning ring (41) as the center, the depth of the two sets of guide sliding grooves (42) is the same as that of the positioning ring (41), the limiting mechanism (43) is arranged on the inner side of the positioning ring (41), and two ends, close to the guide sliding grooves (42), of the limiting mechanism (43) are slidably connected to the inner wall of the guide sliding grooves (42).
3. The automated fixture for PCB boards of claim 2, wherein: one end of each of the two groups of linkage parts (432) is fixedly connected to the bottom lower surface of the bearing part (433), the two groups of linkage parts (43 2) are symmetrically arranged by taking the central axis of the bearing part (43 3) as the center, and the two groups of linkage parts (432) are slidably connected to the bottom lower surfaces of the two groups of bearing parts (433).
4. A PC B board automation clamp as defined in claim 3 wherein: the correction part (431) covers the entire surface of the bearing part (433).
5. The automated PC B board fixture of claim 4 wherein: the top of the columnar structure of the correcting part (43 1) is a plane, and the bottom of the columnar structure is fixed on the upper surface of the bearing part (433).
6. The automated PC B board fixture of claim 5 wherein: the columnar structure is a triangular prism, and the top of the columnar structure is triangular.
7. The automated PC B board fixture of claim 2 wherein: the linkage part (432) comprises a shell (4321);
a first linkage plate (432 2) is connected to one side wall of the shell (432 1) in a penetrating and sliding mode, a spring is arranged between one end of the first linkage plate (432 2) and the inner wall of the shell (432 1), a second linkage plate (432 3) is fixedly connected to one end, away from the spring, of the first linkage plate (432 2), and the joint of the second linkage plate (4323) and the first linkage plate (4322) is arranged in a right angle mode.
8. The automated PC B board fixture of claim 7 wherein: the top of second linkage board (432 3) fixedly connected with grip block (432 4), grip block (432 4) are right trapezoid structure, just a lateral wall that grip block (432 4) is close to first linkage board (432 2) is inclination setting.
9. The automated PC B board fixture of claim 8 wherein: one end of the shell (432 1) is fixedly connected to the lower portion of the bearing portion (43 3), the second linkage plate (432 3) and the clamping block (432 4) are both in sliding connection with the inner wall of the guide chute (4 2), and the bottom end of the second linkage plate (4323) is connected with the output end of the pneumatic finger (3).
10. A method of operating a PC B board automation jig as claimed in any one of claims 1 to 9 wherein: after the PC B board is placed on the clamp, judging whether the PC B board is warped or not and a specific warping part according to detection signals of the distance sensor and the temperature sensor on the correction part by a signal controller based on the distance sensor;
when the distance detected by a certain distance sensor is different from the distance detected by most of the distance sensors, determining that the PC B board is warped and the PC B board at the position of the distance sensor is warped;
correcting the PC B plate which is warped, adjusting a pressure piece to enable the pressure piece to be positive-pressure on the upper surface of the PC B plate, enabling the top of the columnar structure of the correction part to be in contact with the lower surface of the PC B plate on the clamp, determining the distance between the PC B plate and the correction part according to a detection signal of a distance sensor on the correction part, and adjusting the height of the columnar structure of the correction part to enable the top of the correction part to be in contact with the PC B plate; according to detection signals of a distance sensor and a temperature sensor on the correction part, the temperature of the temperature-adjusting oil inlet pipe is adjusted, the temperature of the temperature-adjusting oil inlet pipe corresponding to the warping part is higher than that of the non-warping part, the stress of the warping part is gradually relaxed after being heated, the warping deformed part is restored to be flat under the action of the pressure piece, the heights of all the correction parts are consistent at the moment, the temperature of the temperature-adjusting oil inlet pipe corresponding to the warping part is adjusted to be consistent with that of the non-warping part after that, the whole PC B board is continuously heated for a period of time, and the whole PC B board is flat under the action of the pressure piece;
when the distances detected by all the distance sensors are the same, namely the PC B board is not warped, the whole PC B board is flat;
and moving the flat PCB to any circumferential position so as to facilitate subsequent automatic operation.
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| CN202211510275.0A CN115866894B (en) | 2022-11-29 | 2022-11-29 | Automatic clamp for PCB and working method thereof |
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| CN202211510275.0A CN115866894B (en) | 2022-11-29 | 2022-11-29 | Automatic clamp for PCB and working method thereof |
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| CN115866894B true CN115866894B (en) | 2023-06-16 |
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| CN115866894A (en) | 2023-03-28 |
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