Circuit board makeup processing positioning tray
By incorporating expansion positioning pins and split claws, the design solves the problems of jamming and wear during loading and unloading of traditional circuit board positioning trays, achieving fast and accurate positioning and extended lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN SHENKAI ELECTRONICS CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional circuit board positioning trays are prone to jamming during loading and unloading, and the positioning holes and pins are easily worn, affecting production efficiency and positioning accuracy.
An expansion positioning pin is used, and a split claw driven by a pneumatic or electric piston engages with a conical drive surface to achieve rapid loading and precise positioning. A pressure sensor controls the positioning process to avoid severe friction and wear.
It enables quick loading and unloading of circuit boards without precise alignment, protecting the circuit boards, extending the life of the positioning pins, and ensuring positioning accuracy.
Smart Images
Figure CN224146523U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circuit board tooling tray technology, specifically a circuit board assembly processing positioning tray. Background Technology
[0002] In PCB panelization, positioning trays are the core tooling for supporting PCBs and ensuring their precise positioning in each process stage. Traditional positioning trays rely on rigid positioning pins that precisely engage with positioning holes on the PCB for fixation. This means that during loading, the positioning holes on the PCB must be precisely aligned with the positioning pins, and when removing the PCB, the direction of movement of the PCB must be parallel to the axis of the positioning pins; otherwise, the PCB may jam, which is especially problematic for large PCB panels and further impacts production efficiency.
[0003] On the other hand, whether loading or unloading circuit boards, traditional positioning pins are prone to scratches on the inner wall of the positioning hole or wear on the pin body due to friction during insertion and removal. Especially in high-frequency production, the peeling of the plating on the surface of the pin body will further aggravate the widening of the gap and reduce the positioning accuracy. Utility Model Content
[0004] The purpose of this invention is to provide a circuit board assembly processing positioning tray with expansion positioning pins to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A circuit board panelization processing positioning tray includes a tray body, on which expansion positioning pins are provided, and at least three sets of expansion positioning pins are provided. The expansion positioning pins include:
[0007] The positioning pin body has a hollow interior forming a cavity. Near the top of the circumferential surface of the positioning pin body, there are at least three sets of through slots evenly distributed along the circumference, and the through slots are connected to the cavity.
[0008] The piston is slidably disposed inside the positioning pin body. The piston is driven to move axially by a telescopic rod in the form of pneumatic or electric means. A pressure sensor is provided at the connection between the piston and the telescopic rod. The top of the piston is provided with a conical driving surface.
[0009] The segmented claw is slidably disposed in each of the through slots via a slider and groove assembly. The inner end of the segmented claw is connected to a roller via a connecting rod, and the central axis of the connecting rod is located on the symmetry plane of the segmented claw. The roller and the conical driving surface form an inclined surface engagement.
[0010] The reset spring is fixedly connected at both ends to the outer end of the split claw and the bottom surface of the blind hole opened on the circumference of the positioning pin body;
[0011] The pressure sensor is used to provide feedback on the pressure value when the split claw contacts the inner wall of the positioning hole on the circuit board, and the control unit controls the telescopic rod to stop moving based on the feedback pressure value.
[0012] Preferably, the tapered driving surface includes a first tapered surface and a second tapered surface, wherein the cone angle of the first tapered surface is twice the cone angle of the second tapered surface.
[0013] Preferably, the cone angle of the first conical surface is 90 to 120 degrees.
[0014] Preferably, the axial length of the first conical surface is equal to the axial length of the second conical surface.
[0015] Preferably, a raceway is provided on the conical drive surface, the arc surface of the raceway is adapted to the roller, and the surfaces of the raceway and the roller are subjected to nitriding hardening treatment.
[0016] Preferably, the slider-slide assembly includes a V-shaped slider fixedly connected to the side wall of the through groove and a V-shaped slide groove formed on the opposite side of the split claw. The two sets of V-shaped slide grooves on the same side are symmetrical about the central axis of the connecting rod, and the mating surfaces of the V-shaped slide groove and the V-shaped slider are coated with polytetrafluoroethylene.
[0017] Preferably, the outer end face of the split claw is an arc-shaped surface, which is adapted to the positioning hole of the circuit board.
[0018] Preferably, the split claw assembly is provided with four sets, and the corresponding through grooves are distributed at equal angles of 90 degrees in the circumferential direction of the positioning pin body.
[0019] Compared with the prior art, the beneficial effects of this utility model are:
[0020] 1. When the split claw is in the retracted state, the effective diameter of the positioning pin is reduced to less than the diameter of the positioning hole, allowing for quick loading and unloading of the circuit board without precise alignment. This avoids severe friction between the contact surfaces, effectively protects the circuit board, and extends the service life of the positioning pin.
[0021] 2. After the circuit board is loaded, the split claws are in close contact with the positioning holes. The interaction force between the split claws and the positioning holes is controllable, avoiding the problem of gaps between the positioning pins and positioning holes after ordinary positioning pins are positioned. Attached Figure Description
[0022] Figure 1 A schematic diagram of the overall structure of this utility model;
[0023] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;
[0024] Figure 3 This utility model shows the structure of the positioning pin after half of the positioning pin body is cut off and the positioning pin is expanded.
[0025] Figure 4 An exploded view of the positioning pin body and the split claw in this utility model.
[0026] In the figure: 1. Pallet body; 2. Positioning pin body; 3. Through groove; 4. Piston; 5. Telescopic rod; 6. Split claw; 7. Connecting rod; 8. First conical surface; 9. Second conical surface; 10. Return spring; 11. Blind hole; 12. Raceway; 13. V-shaped slider; 14. V-shaped groove; 15. Roller. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] This utility model provides a technical solution:
[0029] See Figure 1 A circuit board panelization processing positioning tray includes a tray body 1, on which expansion positioning pins are provided. At least three sets of expansion positioning pins are provided, and the expansion positioning pins include:
[0030] See Figure 3 and Figure 4 The positioning pin body 2 has a hollow cavity inside. Near the top of the circumferential surface of the positioning pin body 2, there are not less than three sets of through grooves 3 evenly distributed along the circumferential direction, and the through grooves 3 are connected to the cavity.
[0031] Piston 4 is slidably disposed inside the positioning pin body 2. Piston 4 is driven to move axially by a pneumatic or electric telescopic rod 5. A pressure sensor is provided at the connection between piston 4 and telescopic rod 5. The pressure sensor is electrically connected to the control unit. The pressure sensor is a miniature sensor, for example, a miniature pressure sensor of model TE Connectivity Model 060 can be used. Of course, other suitable miniature pressure sensors can also be selected. The top of piston 4 is provided with a conical driving surface.
[0032] See Figure 4 The split claw 6 is slidably set in each through slot 3 through the slider and groove assembly. The inner end of the split claw 6 is connected to the roller 15 through the connecting rod 7 and the central axis of the connecting rod 7 is on the symmetry plane of the split claw 6. The roller 15 and the conical drive surface form an inclined surface fit.
[0033] The reset spring 10 is fixedly connected at one end to the outer end of the split claw 6 and at the other end to the bottom surface of the blind hole 11 opened on the circumference of the positioning pin body 2. Two sets of reset springs 10 are provided on each split claw 6 and are symmetrical about the middle split surface of the split claw 6.
[0034] The pressure sensor needs to be calibrated in advance to ensure that the split claw 6 is in close contact with the inner wall of the positioning hole, that is, to complete the pressure value measured during positioning, and set this pressure value as the target value. During the positioning process, the pressure sensor continuously measures the pressure value and transmits the pressure value to the control unit. When the measured value is the target value, the control system controls the telescopic rod 5 to stop moving.
[0035] See Figure 3 The conical driving surface includes a first conical surface 8 and a second conical surface 9, and the cone angle of the first conical surface 8 is twice the cone angle of the second conical surface 9.
[0036] The cone angle of the first conical surface 8 is 90 to 120 degrees.
[0037] The axial length of the first conical surface 8 is equal to the axial length of the second conical surface 9. Of course, the sum of the two axial lengths is slightly greater than the axial displacement required by the piston 4 when the split claw 6 expands and completes positioning.
[0038] The following relationship exists between the extension / retraction amount L of the split claw 6 and the axial movement H of the piston 4:
[0039]
[0040] in, It is half the cone angle of the conical driving surface;
[0041] Therefore, it can be seen that the radial movement speed of the first conical surface 8 driving the segmented claw 6 is much greater than that of the second conical surface 9 driving the segmented claw 6, and the radial movement distance when the first conical surface 8 is driven is much greater than that when the second conical surface 9 is driven. This results in the first conical surface 8 driving the segmented claw 6 to expand rapidly and approach the inner wall of the positioning hole, while the second conical surface 9 drives the segmented claw 6 to expand slowly and contact and squeeze the inner wall of the positioning hole. The pressure value is measured by the pressure sensor until the pressure value is the target pressure value, at which point the telescopic rod 5 stops moving. In other words, the first conical surface 8 and the second conical surface 9 work together to achieve the effect of rapid expansion in the early stage and precise locking and positioning in the later stage.
[0042] In this application, the axial length of the split claw 6 along the positioning pin body 2 is determined according to the specific height of the expansion positioning pin, ensuring that the roller 15 is far away from the top of the positioning pin body 2, and then a suitable cone angle of the first cone surface 8 is selected so that the piston 4 will not interfere with the top surface of the positioning pin body 2 during axial movement.
[0043] See Figure 3 A raceway 12 is provided on the conical drive surface. The arc surface of the raceway 12 is adapted to the roller 15. The surfaces of the raceway 12 and the roller 15 are nitrided and hardened. The thickness of the nitrided layer is 0.1-0.15mm. The arc surface of the raceway 12 and the roller 15 cooperate to achieve surface contact during the rolling process.
[0044] See Figure 4 The slider-slide assembly includes a V-shaped slider 13 fixedly connected to the side wall of the through groove 3 and a V-shaped slide 14 opened on the opposite side of the split claw 6. The two sets of V-shaped slides 14 on the same side are symmetrical about the central axis of the connecting rod 7, and the mating surfaces of the V-shaped slide 14 and the V-shaped slider 13 are coated with polytetrafluoroethylene to reduce frictional resistance. The radial motion stiffness of the split claw 6 can be significantly improved by the symmetrical distribution of the V-shaped slides 14, V-shaped sliders 13 and the V-shaped slides 14 on both sides of the same split claw 6 along the central axis of the connecting rod 7.
[0045] The outer end face of the split claw 6 is an arc-shaped surface, which is adapted to the positioning hole of the circuit board. The outer end arc-shaped surface of the split claw 6 is coated with a tungsten carbide wear-resistant layer.
[0046] The split claw 6 component has four sets, and the corresponding through grooves 3 are distributed at an equal angle of 90 degrees around the 2-circumference of the positioning pin body.
[0047] Using the device of this utility model:
[0048] In the initial position, the driving surface of piston 4 is in contact with roller 15. At this time, the split claw 6 is in a contracted state, and the effective diameter of the expansion positioning pin is smaller than the diameter of the positioning hole. The expansion positioning pin can easily pass through the positioning hole of the circuit board to complete the loading. Then, the telescopic rod 5 is activated, piston 4 moves axially, and the first driving surface and the second driving surface drive the split claw 6 to move radially in sequence. Since the included angle of the first conical surface 8 is twice the included angle of the second driving surface, during the radial movement of the split claw 6, the radial movement speed driven by the first conical surface 8 is much greater than that driven by the second conical surface 9. The first conical surface 8 quickly drives the split claw 6 to approach the inner wall of the positioning hole, and the second conical surface 9 drives the split claw 6 to slowly contact and squeeze the inner wall of the positioning hole until the pressure value of the sensor is equal to the calibrated target value. The telescopic rod 5 stops moving, and the positioning is completed.
[0049] To remove the circuit board, move the telescopic rod 5 in the opposite direction and reset it. The roller 15 disengages from the tapered drive surface, and the split claw 6 resets under the action of the reset spring 10. Once the split claw 6 is reset, the circuit board can be easily removed.
[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A positioning tray for processing of a circuit board in a panel, comprising a tray main body (1), characterized in that, The tray body (1) is provided with expansion positioning pins, and at least three groups of expansion positioning pins are arranged, the expansion positioning pin comprises: A positioning pin body (2) is internally hollow to form a cavity, a plurality of through grooves (3) are arranged on the circumferential surface of the positioning pin body (2) near the top end, and the through grooves (3) are communicated with the cavity; A piston (4) is slidably arranged in the positioning pin body (2), the piston (4) is driven to move axially by a telescopic rod (5) in a pneumatic or electric form, a pressure sensor is arranged at the connection position of the piston (4) and the telescopic rod (5), and a conical driving surface is arranged at the top end of the piston (4); A split claw (6) is slidably arranged in each through groove (3) through a sliding block and sliding groove assembly, the inner end of the split claw (6) is connected with a roller (15) through a connecting rod (7), and the central axis of the connecting rod (7) is on the symmetry plane of the split claw (6), the roller (15) is matched with the conical driving surface to form an inclined surface; A reset tension spring (10) is fixedly connected at both ends of the outer end of the split claw (6) and the bottom surface of a blind hole (11) arranged on the circumferential surface of the positioning pin body (2); The pressure sensor is used to feedback the pressure value when the split claw (6) contacts the inner wall of the positioning hole of the circuit board, and a control unit controls the telescopic rod (5) to stop moving according to the feedback pressure value.
2. The positioning tray for processing of a circuit board according to claim 1, wherein The conical driving surface comprises a first conical surface (8) and a second conical surface (9), and the cone angle of the first conical surface (8) is twice the cone angle of the second conical surface (9).
3. The positioning tray for processing of a circuit board according to claim 2, wherein The cone angle of the first conical surface (8) is 90-120 degrees.
4. The circuit board panel processing positioning tray according to claim 2, wherein The axial length of the first conical surface (8) is equal to the axial length of the second conical surface (9).
5. The positioning tray for processing of a circuit board according to claim 1, wherein A rolling groove (12) is arranged on the conical driving surface, the arc surface of the rolling groove (12) is matched with the roller (15), and the surfaces of the rolling groove (12) and the roller (15) are subjected to nitriding hardening treatment.
6. The positioning tray for processing of a circuit board according to claim 1, wherein The sliding block and sliding groove assembly comprises a V-shaped sliding block (13) fixedly connected to the side wall of the through groove (3) and a V-shaped sliding groove (14) arranged on the opposite side surfaces of the split claw (6), two groups of V-shaped sliding grooves (14) on the same side surface are symmetrical about the central axis of the connecting rod (7), and the matching surfaces of the V-shaped sliding groove (14) and the V-shaped sliding block (13) are provided with a polytetrafluoroethylene coating.
7. The positioning tray for processing of a circuit board according to claim 1, wherein The outer end surface of the split claw (6) is an arc surface, and the arc surface is matched with the positioning hole of the circuit board.
8. The positioning tray for processing of a circuit board according to claim 1, wherein, The split claw (6) assembly is provided with four groups, and the corresponding through grooves (3) are distributed at an equal angle of 90 degrees in the circumferential direction of the positioning pin body (2).