CN-122016457-A - Circuit board detection clamping device and operation method thereof

CN122016457ACN 122016457 ACN122016457 ACN 122016457ACN-122016457-A

Abstract

The invention relates to the technical field of circuit board detection, in particular to a circuit board detection clamping device and an operation method thereof. The apparatus includes a load-bearing base with an opening and a first pair of clamping modules having fixed side and sliding side clamping mechanisms. Each mechanism has a lower carrier and an upper clamping unit to clamp the PCB edge. The sliding side mechanism is connected with the first tension displacement module and can be driven away from the fixed side, so that tensile tension is applied to the PCB to flatten the PCB. The second clamping module pair can be further arranged for biaxial stretching and comprises a push rod and a movable supporting module for auxiliary positioning and supporting. The invention can actively correct the deformation of the PCB surface and improve the detection precision.

Inventors

JIAN ZHENQI
SONG HANCHUAN
ZHENG YUZHI
GAO PENG
HE HAOTIAN
KONG FANLI

Assignees

南京大量数控科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260206

Claims (9)

1. A circuit board detection clamping device is characterized by comprising, A load-bearing base (110) having a base opening (112), and A first clamping module pair (120) arranged on the bearing base (110) and comprising a first clamping mechanism (122) and a second clamping mechanism (124) which are oppositely arranged, Wherein the first clamping mechanism (122) and the second clamping mechanism (124) are respectively positioned at two opposite sides of the base opening (112); the first clamping mechanism (122) is fixed on the bearing base (110), and the second clamping mechanism (124) is slidably arranged on the bearing base (110); The first clamping mechanism (122) and the second clamping mechanism (124) both comprise a lower bearing piece (A) and an upper clamping unit (B) which is arranged opposite to the lower bearing piece (A), and the upper clamping unit (B) can move relative to the lower bearing piece (A) so as to jointly clamp and fix the printed circuit board (200) with the lower bearing piece (A); The second clamping mechanism (124) is connected with a first tension displacement module (126), and the first tension displacement module (126) is used for driving the second clamping mechanism (124) to move along a direction deviating from the first clamping mechanism (122), so that tensile tension is applied to the printed circuit board (200).
2. The circuit board inspection clamping device of claim 1, further comprising a second pair of clamping modules (130), Wherein the first pair of clamping modules (120) is arranged along a first axial direction (D1), and the second pair of clamping modules (130) is arranged along a second axial direction (D2) perpendicular to the first axial direction (D1); the first clamping module pair (120) and the second clamping module pair (130) are used for biaxial stretching the printed circuit board (200) along the first axial direction (D1) and the second axial direction (D2), and the first clamping module pair (120) and the second clamping module pair (130) can sequentially act to sequentially apply stretching tension to the printed circuit board (200); The second clamping module pair (130) is connected with a second tension displacement module (136), and the second tension displacement module (136) is used for driving the second clamping module pair (130) to move along the second axis (D2) so as to apply tensile tension to the printed circuit board (200).
3. The circuit board inspection clamping device as set forth in claim 1, wherein said first tension displacement module (126) comprises a belt (125) and a slide (127) disposed on said belt (125); The lower carrier (a) and the upper clamping unit (B) of the second clamping mechanism (124) are connected to the slide (127) to move synchronously with the slide (127).
4. The circuit board inspection gripping device of claim 1, further comprising, A jack (140) that is provided in the base opening (112) of the load base (110) so as to be capable of being lifted; The ejector pins (140) are movable to be flush with the bearing surface of the lower bearing (A) to assist in positioning the printed circuit board (200).
5. The circuit board inspection gripping device of claim 1, further comprising, A detection module (150) arranged on one side of the bearing base (110) for detecting the printed circuit board (200), and A movable support module (160) disposed at the base opening (112) of the load-bearing base (110) and including at least one support rail (162); The support rail (162) is movable relative to the detection module (150) to switch between supporting the printed circuit board (200) and avoiding a detection path of the detection module (150).
6. The operation method of the circuit board detection clamping device is characterized by comprising the following steps, Providing the circuit board inspection clamping device according to any one of claims 1 to 5, loading a printed circuit board (200) on the loading base (110), and enabling opposite side edges of the printed circuit board (200) to correspond to the first clamping mechanism (122) and the second clamping mechanism (124) respectively; -placing the printed circuit board (200) on the lower carrier (a), driving the upper clamping unit (B) to move with respect to the lower carrier (a) to jointly clamp and fix the printed circuit board (200) with the lower carrier (a); -activating the first tension displacement module (126) to drive the second clamping mechanism (124) to move in a direction away from the first clamping mechanism (122) to apply a tensile tension to the printed circuit board (200).
7. The method of operation of a circuit board inspection clamping device as set forth in claim 6, wherein said circuit board inspection clamping device further comprises a second pair of clamping modules (130) aligned along a second axis (D2); the operation method further comprises the following steps: After or while the first clamping module pair (120) applies a tensile force in a first axial direction (D1) to the printed circuit board (200), a second tension displacement module (136) is started to drive the second clamping module pair (130) to move along the second axial direction (D2), and a tensile force in the second axial direction (D2) is applied to the printed circuit board (200) to realize biaxial stretching.
8. The method for operating a circuit board inspection gripping device according to claim 6, wherein in the step of placing the printed circuit board (200) on the lower carrier (A), the ejector pins (140) which are liftably provided in the base openings (112) are lifted so that the top surfaces thereof are flush with the carrying surface of the lower carrier (A) to assist in positioning the printed circuit board (200); after the printed circuit board (200) is clamped and fixed, the ejector rod (140) is lowered.
9. The method for operating a circuit board inspection gripping device according to claim 6, wherein the printed circuit board (200) is inspected by using an inspection module (150) provided at one side of the carrying base (110); During the inspection process, the position of the support rail (162) of the movable support module (160) is controlled to move under the printed circuit board (200) to provide support when needed and to move away for avoidance as the inspection path of the inspection module (150) passes.

Description

Circuit board detection clamping device and operation method thereof Technical Field The invention relates to the technical field of circuit board detection, in particular to a circuit board detection clamping device and an operation method thereof. Background As electronic products are developed to be thin, lightweight, and small, the thickness of a Printed Circuit Board (PCB) is continuously reduced, and the rigidity thereof is also reduced. When such a thin PCB is optically scanned or electrically tested, it is carried on a test carrier. In order to adapt to the back drilling process and avoid backlight interference, the center of the detection carrier is usually designed to be an opening structure. This allows the PCB to be supported only at the edges thereof, and the central region thereof is extremely susceptible to sagging or bending deformation due to its own weight. The prior art mainly relies on passive bearing and lacks an active correction means for plate surface deformation. The uneven surface of the board can cause defocusing of an optical detection system or poor contact of a test probe, severely restricts the detection precision and yield, and becomes a key technical bottleneck in the manufacture of high-density and thin PCB. Disclosure of Invention The present invention has been made in view of the above-mentioned problems occurring in the prior art. Therefore, the invention aims to solve the problem of detection accuracy reduction caused by dead weight sagging deformation due to central suspended support during detection of the ultrathin printed circuit board. In order to solve the technical problems, the invention provides a circuit board detection clamping device which comprises a bearing base and a first clamping module pair, wherein the bearing base is provided with a base opening, the first clamping module pair is arranged on the bearing base and comprises a first clamping mechanism and a second clamping mechanism which are oppositely arranged, the first clamping mechanism and the second clamping mechanism are respectively positioned on two opposite sides of the base opening, the first clamping mechanism is fixed on the bearing base, the second clamping mechanism is slidably arranged on the bearing base, each of the first clamping mechanism and the second clamping mechanism comprises a lower bearing piece and an upper clamping unit which is oppositely arranged with the lower bearing piece, the upper clamping unit can move relative to the lower bearing piece so as to clamp and fix a printed circuit board together with the lower bearing piece, and the second clamping mechanism is connected with a first tension displacement module which is used for driving the second clamping mechanism to move along a direction deviating from the first clamping mechanism so as to apply tension to the printed circuit board. The circuit board detection clamping device further comprises a second clamping module pair, wherein the first clamping module pair is arranged along a first axial direction, the second clamping module pair is arranged along a second axial direction perpendicular to the first axial direction, the first clamping module pair and the second clamping module pair are used for carrying out biaxial stretching on the printed circuit board along the first axial direction and the second axial direction, the first clamping module pair and the second clamping module pair can be sequentially operated to sequentially apply stretching tension to the printed circuit board, and a second tension displacement module is connected to the second clamping module pair and is used for driving the second clamping module pair to move along the second axial direction so as to apply stretching tension to the printed circuit board. The circuit board detection clamping device is characterized in that the first tension displacement module comprises a transmission belt and a sliding seat arranged on the transmission belt, and the lower bearing piece and the upper clamping unit of the second clamping mechanism are connected to the sliding seat so as to synchronously move along with the sliding seat. The circuit board detection clamping device comprises a bearing base, a base opening, a top rod, a supporting rod and a positioning mechanism, wherein the bearing base opening is used for supporting a printed circuit board, the top rod is arranged in the bearing base opening in a lifting mode, and the top rod can move to be flush with a bearing surface of the lower bearing piece so as to assist in positioning the printed circuit board. The circuit board detection clamping device comprises a bearing base, a detection module and a movable supporting module, wherein the bearing base is used for bearing a printed circuit board, the circuit board detection clamping device is used for detecting the printed circuit board, the movable supporting module is arranged at an opening of the bearing base and comprises at least one support