Fixture

Abstract

This application relates to the field of assembly technology, and more particularly to a fixture for positioning an electronic motherboard. The electronic motherboard includes a circuit board assembly, a shielding shell, and a first circuit board. The circuit board assembly includes a first surface and a second surface, with a System-on-a-Chip (SOC) device mounted on the second surface. The first surface and the SOC device are covered with a solder paste layer. The fixture includes a soldering station, a first clamp, and a second clamp. The soldering station supports the circuit board assembly and the first circuit board, with the first circuit board abutting against the solder paste layer. The soldering station has mating holes that expose the SOC device. The first clamp applies force to the first circuit board, clamping the solder paste layer between the first circuit board and the circuit board assembly. The shielding shell covers the SOC device, and the second clamp applies force to the shielding shell, clamping the solder paste layer between the shielding shell and the circuit board assembly. This fixture can reduce the problem of excessive process steps.

Claims

1. A fixture configured to position an electronic motherboard, the electronic motherboard including a circuit board assembly, a shielding shell and a first circuit board, the circuit board assembly including opposing first and second surfaces, the second surface having at least one SOC device, and the edges of the first surface and the SOC device having solder paste layers. The improvement lies in that the fixture includes a soldering station, a first clamp, and a second clamp; the soldering station is configured to support the circuit board assembly and the first circuit board, such that the first circuit board is supported on the first surface of the circuit board assembly, and the first circuit board abuts against the solder paste layer; The soldering station has a through-hole extending along a first direction, the through-hole being configured to expose the SOC device on the bottom surface of the soldering station; the thickness direction of the fixture is defined as the first direction; the first clamp is configured to connect to the soldering station and apply force to the first circuit board, clamping the solder paste layer between the first circuit board and the circuit board assembly along the first direction; after the fixture is flipped, the shielding shell is placed over the SOC device, the second clamp is configured to connect to the soldering station and apply force to the shielding shell, clamping the solder paste layer between the shielding shell and the circuit board assembly along the first direction, thus positioning and clamping the circuit board assembly, the shielding shell, and the first circuit board together.

2. The fixture as described in claim 1, wherein, The welding station has a plurality of first positioning holes extending through it along the first direction; the opposite sidewalls of the circuit board assembly are recessed to form first positioning grooves, and the opposite sidewalls of the first circuit board are recessed to form second positioning grooves; the fixture further includes a positioning member and a correcting member; the positioning member is configured to be movably mounted in the first positioning hole along the first direction, and at least a portion of the positioning member is received in the first positioning groove, and the end of the positioning member facing away from the circuit board assembly is an abutting end; the correcting member is configured to be movably mounted on the bottom of the welding station facing away from the circuit board assembly, and the correcting member is configured to abut against the abutting end and push the positioning member to move axially, so that at least a portion of the positioning member connects the first positioning groove and the second positioning groove; and the correcting member is configured to apply a force to the positioning member in the horizontal direction, so that the positioning member laterally clamps the circuit board assembly and the first circuit board, and the circuit board assembly and the first circuit board are mutually positioned.

3. The fixture as described in claim 2, wherein, The soldering station includes a base and at least one carrier plate. The carrier plate has at least one mounting area configured to support the circuit board assembly and the first circuit board. The base forms at least one receiving groove on its surface facing the carrier plate along the first direction. The carrier plate is configured to be movably mounted in the receiving groove along the first direction. When the carrier plate is separated from the receiving groove, the positioning member does not protrude from the first surface of the circuit board assembly along the first direction, so that the solder paste layer is printed on the first surface.

4. The fixture as described in claim 3, wherein, The base is configured to magnetically connect with the carrier plate.

5. The fixture as described in claim 2, wherein, The circuit board assembly further includes a second positioning hole, and the first circuit board further includes a third positioning hole. The second positioning hole passes through the circuit board assembly along the first direction, and the third positioning hole passes through the first circuit board along the first direction. The positioning element is also configured to connect the first positioning hole, the second positioning hole, and the third positioning hole, so that the soldering station, the circuit board assembly, and the first circuit board are mutually positioned.

6. The fixture as described in claim 1, wherein, The first clamp has a protrusion on its surface facing the soldering table along the first direction. The protrusion is configured to apply a force to the first circuit board along the first direction, thereby clamping the solder paste layer between the first circuit board and the circuit board assembly along the first direction.

7. The fixture as described in claim 1, wherein, The second clamp includes a clamping plate and a positioning stage, the positioning stage being configured to move relative to the clamping plate along the first direction and apply a force along the first direction to the shielding shell, thereby clamping the solder paste layer between the shielding shell and the circuit board assembly along the first direction.

8. The fixture as described in claim 1, wherein, The first clamp has at least one first positioning post on its surface facing the welding table along the first direction, and the welding table has a fourth positioning hole in the area opposite to the first positioning post. The first clamp is configured to be positioned with the welding table by the cooperation of the first positioning post and the fourth positioning hole. The second clamp has at least one second positioning post on its surface facing the welding table along the first direction, and the welding table has a fifth positioning hole in the area opposite to the second positioning post. The second clamp is configured to be positioned with the welding table by the cooperation of the second positioning post and the fifth positioning hole.

9. The fixture as described in claim 3, wherein, The fixture further includes a locking member, which includes a pressing end, a connecting portion, and a locking end. At least a portion of the width of the pressing end and the locking end is greater than the width of the connecting portion. The first fixture has a first connecting hole, and at least a portion of the width of the pressing end is greater than the width of the first connecting hole. A first locking hole is provided on the welding platform in the area corresponding to the first connecting hole. A portion of the width of the first locking hole is greater than the width of the locking end, and another portion of the width of the first locking hole is less than the width of the locking end. The locking end passes through the first connecting hole and the first locking hole and rotates to clamp the first fixture and the welding platform with the pressing end and the locking end. The second fixture is provided with a second connecting hole, and at least a portion of the width of the pressing end is greater than the width of the second connecting hole. A second locking hole is provided in the area corresponding to the second connecting hole on the welding platform. Part of the width of the second locking hole is greater than the width of the locking end, and another part of the width of the second locking hole is less than the width of the locking end. The locking end passes through the second connecting hole and the second locking hole and rotates to clamp the second clamp and the welding platform between the pressing end and the locking end.

10. The fixture as described in claim 9, wherein, The fixture also includes an elastic element, the inner diameter of which is larger than the cross-sectional dimension of the connecting portion, so that the elastic element is fitted onto the connecting portion.

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