A PCBA test tool capable of rapid changeover

Abstract

The application discloses a PCBA test tool capable of rapid change type, which comprises a lower computer, a tool frame and a needle bed module. The lower computer is internally provided with an intelligent plug-in, a backboard and a female connector of the needle bed module connector; the tool frame is provided with a needle bed module tray and a sliding guide rail; and the needle bed module is provided with a test probe, a bottom plate PCB and a male connector of the needle bed module connector. The lower computer is installed in the tool frame, the needle bed module is placed in the needle bed module tray, and the female connector of the needle bed module connector is connected with the male connector of the needle bed module connector. During testing, the PCBA to be tested is in contact with the needle bed module and is pressed tightly, and the test probe is in contact with the test point of the PCBA to be tested. The application is not connected with any cable or flying wire between the needle bed module and the lower computer, can realize drawer type plugging and unplugging, is convenient to change type and reliable in connection, and the lower computer is provided with a test signal switching matrix module, and is suitable for the differentiated needs of different PCBAs to be tested to test signal sources. The test tool can be applied to a PCBA production flow line, and realizes continuous flow of PCBA welding and testing links.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic circuit board detection equipment, in particular to a PCBA test tool capable of rapid model change. BACKGROUND

[0002] PCBA factory test is an important link in the manufacturing process of electronic products, an important means of product quality assurance, and also an important factor restricting production efficiency and increasing production cost. The test tool based on needle bed module has the advantages of stability and reliability, easy feeding and discharging, etc., and is one of the commonly used test methods for PCBA. However, the traditional needle bed test tool has poor universality, and needs to replace the needle bed and the corresponding test circuit when testing different models of PCBA, which reduces the production efficiency and increases the production cost. These negative effects are particularly significant when facing the market demand of small batch and multi-species, which greatly limits the automation upgrading of PCBA production test. Therefore, it is of great significance to provide a test tool with high universality and efficient and reliable model change to meet the multi-species PCBA parallel production demand, improve production efficiency and reduce cost investment. SUMMARY

[0003] The present application provides a PCBA test tool capable of rapid model change to improve the universality of the test tool and meet the multi-species PCBA parallel production demand.

[0004] Technical scheme: To solve the above problems, the present application adopts a PCBA test tool capable of rapid model change, which comprises a lower computer, a tool frame and a needle bed module.

[0005] The lower computer comprises a lower computer main body, a backboard placed vertically to the inner bottom surface of the lower computer main body and extending from the inside to the outside of the lower computer main body, and a plurality of needle bed module connector female heads installed on the backboard and located outside the lower computer main body; the lower computer main body comprises a plurality of clamping grooves and intelligent plug-ins inserted into the inside of the lower computer main body through the clamping grooves; the intelligent plug-ins are connected with the backboard; the backboard is provided with a CAN bus to control and manage the intelligent plug-ins; the signal source and loop of the intelligent plug-ins are placed in the needle bed module connector female heads;

[0006] The tool frame is provided with a cavity accommodating the lower computer main body, and the upper surface of the tool frame is provided with a needle bed module tray surrounding the cavity and a needle bed module tray sliding guide rail located at the side of the needle bed module tray;

[0007] The needle bed module is provided with a bottom plate PCB, test probes and a plurality of needle bed module connector male heads; during testing, one end of the test probes is in contact with test points of a PCBA to be tested, and the other end is in contact with a signal source contact on the bottom plate PCB; the needle bed module connector male head is provided with a PIN pin; the signal source contact on the bottom plate PCB is connected to the PIN pin of the needle bed module connector male head through PCB wiring;

[0008] The lower machine body is installed in a cavity of the tool frame, the needle bed module is installed on a needle bed module tray through the bottom plate PCB and the needle bed module tray, and the needle bed module connector female head is connected to the needle bed module connector male head; when the needle bed module is replaced, the needle bed module tray is slid out through the needle bed module tray sliding guide rail.

[0009] Further, the needle bed module includes a bottom plate PCB, a bearing plate, a test probe fixing plate, a pressing plate, test probes and a connector male head; one side of the bearing plate is attached to the bottom plate PCB, and the other side is provided with a groove, the test probe fixing plate is installed in the groove through a screw in a fixing hole; the needle bed module is provided with a spring, the pressing plate is installed on the test probe fixing plate through a guide column, a screw and the spring, the test probes are installed on the test probe fixing plate, one end of the test probes passes through the bearing plate, and the other end passes through the pressing plate;

[0010] The pressing plate is provided with a through hole for the test probes to pass through, and is further provided with a PCBA side limiting block, a limiting pin and a conical positioning pin; during testing, the PCBA to be tested is fixed in a region defined by the PCBA side limiting block and the positioning pin, and is positioned by the limiting pin; the surface of the test probe fixing plate near the pressing plate is provided with a plurality of needle bed module positioning holes; during testing, a PCBA pressing module is provided on the assembly line, and a support column of the PCBA pressing module is aligned with the needle bed module positioning holes; the bearing plate is provided with a plurality of needle bed module handles.

[0011] Further, the top end of the test probe is lower than the side of the pressing plate away from the test probe fixing plate in a natural state; during testing, the PCBA pressing module is in contact with and pressed against the pressing plate, and the top end of the test probe is exposed and in contact with test points of the PCBA to be tested.

[0012] Further, the tool frame includes a machine frame right baffle, a machine frame left baffle, a machine frame rear baffle and a machine frame front door; the machine frame right baffle, the machine frame left baffle, the machine frame rear baffle and the machine frame front door surround to form a cavity for accommodating the lower machine body;

[0013] The upper part of the machine frame back baffle is provided with a back plate mounting strip, and the lower machine is placed behind the tool frame, the back plate mounting strip is flush with the plate surface of the back plate extending to the outside of the main body of the lower machine, the back plate mounting strip is fixed on the machine frame back baffle by a back plate mounting strip support column, the machine frame front door handle is mounted on the upper part of the machine frame front door, and three through holes are formed in the lower part of the machine frame right baffle and the machine frame left baffle respectively.

[0014] Further, one side of the needle bed module tray is in contact with the machine frame right baffle and the machine frame left baffle, and is fixed and mounted by a fastening nut vertically penetrating the machine frame back baffle, a plug-in handle is mounted on the needle bed module tray.

[0015] Further, a plurality of needle bed module limiting blocks are mounted on the needle bed module tray, and a needle bed module upper limiting block is arranged on the machine frame back baffle; when the needle bed module is mounted on the needle bed module tray, the bearing plate is fixed in the limiting area of the needle bed module limiting block, and the lower surface of the needle bed module upper limiting block is in contact with the upper surface of the bearing plate.

[0016] Further, a small protrusion is arranged at one end of the needle bed module tray sliding guide rail close to the machine frame back baffle, a sliding limiting block is mounted on the lower bottom surface of the needle bed module tray close to the two side edges of the needle bed module tray sliding guide rail, a needle bed module side limiting block and a needle bed module tray limiting snap are arranged on the machine frame right baffle and the machine frame left baffle respectively, and the needle bed module tray limiting snap fixes the position of the needle bed module tray.

[0017] When the needle bed module is replaced, the needle bed module tray limiting snap is loosened, the plug-in handle is pulled, the needle bed module tray slides through the needle bed module tray sliding guide rail, the small protrusion on the needle bed module tray sliding guide rail contacts the needle bed module side limiting block to limit the position of the needle bed module tray after being pulled out, and the sliding limiting block limits the insertion position of the needle bed module tray.

[0018] Further, an RFID is attached to the side of the bottom plate PCB in contact with the needle bed module tray, a card reader is mounted on the intelligent plug-in, the RFID is aligned with the position of the card reader when the needle bed module is mounted on the needle bed module tray, the card reader reads the RFID information, automatically identifies the type of the needle bed module, and matches the supported PCBA model to be tested.

[0019] Further, a bar code scanning gun interface is arranged in the main body of the lower machine, the bar code scanning gun is externally connected to the outside of the main body of the lower machine through the interface, the bar code scanning gun reads the bar code information of the PCBA to be tested, obtains the model of the PCBA to be tested, and compares and verifies the model of the PCBA to be tested supported by the needle bed module.

[0020] Further, the test probe adopts a double-head probe with a spring.

[0021] Beneficial effects: the present application has the following significant advantages compared with the prior art:

[0022] (1) The test circuit is integrated in the lower computer, and a modular design is adopted, different intelligent plug-ins can be conveniently replaced, and differentiated test circuits are provided.

[0023] (2) The lower computer intelligent plug-in can program-controlled switch the test circuit electrical property and the test circuit topology, and realize automatic change without manual intervention.

[0024] (3) The connection of the test signal circuit is realized in the form of backplane bus, compared with the wire harness connection mode of the traditional tooling, the tooling manufacturing process is more standardized, the connection reliability of the test circuit is higher, the service life is longer, and the change is more efficient.

[0025] (4) The connection of the probe and the test circuit is realized in the form of double-head probe and gold finger contact, compared with the traditional needle bed tooling, the tail of the test probe does not need to be welded, the needle bed module manufacturing process is simpler, and the reliability is higher, and the probe is also more convenient to replace.

[0026] (5) The mechanical structure of the needle bed module drawer type sliding and the backplane plug-in type installation mode are adopted, when the needle bed module is replaced, only the needle bed module tray limiting latch needs to be loosened, and then it can be pulled out, so that the change is more convenient and fast.

[0027] (6) RFID technology is adopted, the model of the needle bed module is intelligently identified, self-checking and verification of the test system are realized, the safety of the tooling is improved, and intelligent inventory management of the needle bed module is also facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the PCBA production line to which the present application is installed

[0029] Figure 2 is a schematic diagram of the lower computer of the present application

[0030] Figure 3 is a schematic diagram of the tooling frame of the present application

[0031] Figure 4 is a schematic diagram of the needle bed module of the present application

[0032] Figure 5 is a schematic diagram of the side view of the needle bed module of the present application, illustrating the layered structure of the needle bed module DETAILED DESCRIPTION

[0033] As shown in Figure 1 , the PCBA test tooling capable of rapid change of the present embodiment includes a lower computer 37, a tooling frame 36 and a needle bed module 35.

[0034] AsFigure 2 As shown in the drawings, the lower computer 37 includes a lower computer body 1, a backboard 2 placed perpendicularly to the inner bottom surface of the lower computer body 1 and extending from the inside of the lower computer body 1 to the outside of the lower computer body 1, and five needle bed module connector female heads 3 mounted on the backboard 2 and located outside the lower computer body. The lower computer body 1 includes twelve card slots 38 and smart plug-ins 39 inserted into the inside of the lower computer body 1 through the card slots 38; the smart plug-ins 39 are connected with the backboard 2; the smart plug-ins 39 are divided into different functional types, including three types for accessing external strong current test signal sources, for providing strong and weak current test loops, and for providing communication interface test loops. The backboard 2 is provided with a CAN bus for controlling and managing the smart plug-ins 39; the signal sources and loops of the smart plug-ins 39 are placed in the needle bed module connector female heads 3.

[0035] As shown in the drawings, Figure 4 and Figure 5 As shown in the drawings, the needle bed module 35 includes a bottom plate PCB 31, a bearing plate 30, a test probe fixing plate 22, a pressing support plate 24, test probes 26, and a connector male head 32. One surface of the bearing plate 30 is attached to the bottom plate PCB 31, and the other surface is provided with a recess, and the test probe fixing plate 22 is installed in the recess through screws in fixing screw holes 21. The pressing support plate 24 is installed on the test probe fixing plate 22 through guide columns, screws, and springs 28, and the test probes 26 are installed on the test probe fixing plate 22.

[0036] The test probes 26 are double-head probes with springs, one end of the test probes 26 penetrates through the bearing plate 30 to contact the test points of the PCBA to be tested, and the other end penetrates through the pressing support plate 24. The top end of the test probes 26 is lower than the surface of the pressing support plate 24 away from the test probe fixing plate 22 in the natural state, and during testing, the PCBA pressing module 33 contacts and presses the pressing support plate 24, and the top end of the test probes 26 is exposed and contacts the test points of the PCBA to be tested.

[0037] The pressing support plate 24 is provided with through holes for the test probes 26 to penetrate, and the pressing support plate 24 is further provided with a PCBA side limiting block 23, a limiting pin 25, and a conical positioning pin 27, and during testing, the PCBA to be tested is fixed in the area defined by the PCBA side limiting block 23 and the positioning pin 27, and is positioned by the limiting pin 25; the surface of the test probe fixing plate 22 close to the pressing support plate 24 is provided with four needle bed module positioning holes 29 on both sides, the struts of the PCBA pressing module 33 are aligned with the needle bed module positioning holes 29; the bearing plate 30 is provided with one needle bed module handle 20 on each side of the recess.

[0038] The needle bed module connector male head 32 is provided with PIN pins inside; the signal source contacts on the bottom plate PCB 31 are connected with the PIN pins of the needle bed module connector male head 32 through PCB wiring, and the needle bed module connector male head 32 is connected with the needle bed module connector female head 3 located on the lower computer 1.

[0039] like Figure 3 As shown, the tooling frame 36 includes a right frame baffle 7, a left frame baffle 15, a rear frame baffle 10, and a front frame door 18. These components together form a cavity to accommodate the lower-level machine body 1. A backplate mounting strip 8 is installed on the upper part of the rear frame baffle 10. After the lower-level machine 1 is placed in the tooling frame 36, the backplate mounting strip 8 and the backplate 2 extend to the outside of the lower-level machine body 1 at the same height. The backplate mounting strip 8 is fixed to the rear frame baffle 10 by backplate mounting strip support columns 9. A front frame door handle 19 is installed on the front frame door 18. Three through holes are each opened at the lower part of the right frame baffle 7 and the left frame baffle 15 to help dissipate heat from the lower-level machine body 1 and reduce the weight of the tooling frame 36.

[0040] The upper surface of the tooling frame 36 is provided with a needle bed module tray 4 surrounding the cavity. One side of the needle bed module tray 4 contacts the right baffle 7 and the left baffle 15 of the machine frame, and is fixedly installed by a fastening nut 14 that passes vertically through the rear baffle 10 of the machine frame. The needle bed module tray 4 is equipped with a plug-in handle 5, and a needle bed module limit block 6 is installed at each of the four corners of the needle bed module tray 4. The rear baffle 10 of the machine frame is provided with two needle bed module upper limit blocks 11. When the needle bed module 35 is installed on the needle bed module tray 4, the support plate 30 is fixed within the area defined by the needle bed module limit blocks 6, and the lower surface of the needle bed module upper limit blocks 11 contacts the upper surface of the support plate 30. The needle bed module tray 4 is equipped with a sliding guide rail 12 on both sides that contact the right baffle 7 and the left baffle 15 of the machine frame. A small protrusion is provided at one end of the sliding guide rail 12 near the rear baffle 10 of the machine frame. A sliding limit block 13 is installed on the bottom surface of the needle bed module tray 4 near both sides of the sliding guide rail 12. A needle bed module side limit block 16 and a needle bed module tray limit buckle 17 are provided on the right baffle 7 and the left baffle 15 of the machine frame. The needle bed module tray limit buckle 17 fixes the position of the needle bed module tray 4.

[0041] When replacing the needle bed module 35, loosen the needle bed module tray limit buckle 17, pull the insertion and removal handle 5, and the needle bed module tray 4 slides through the needle bed module tray sliding guide 12. The small protrusion on the needle bed module tray sliding guide 12 contacts the needle bed module side limit block 16 to limit the position of the needle bed module tray 4 after it is pulled out, and the sliding limit block 13 limits the insertion position of the needle bed module tray 4.

[0042] An RFID tag is attached to the side of the base PCB 31 that contacts the needle bed module tray 4. A card reader is installed on the smart plug-in 39. When the needle bed module 35 is installed on the needle bed module tray 4, the RFID tag and the card reader are aligned. The card reader reads the RFID information, automatically identifies the type of the needle bed module 35, and matches the supported PCBA model under test.

[0043] The lower computer main body 1 is internally provided with a bar code scanning gun interface, the bar code scanning gun is externally connected to the outside of the lower computer main body 1 through the interface, the bar code scanning gun reads the PCBA bar code information to be measured, and the PCBA model to be measured is obtained and compared and verified with the PCBA model to be measured supported by the needle bed module 35.

[0044] As shown in Figure 1 The present application is installed on the PCBA production line, during testing, the belt conveying track 34 is vertically sunk and separated from the PCBA to be measured, the PCBA pressing module 33 is vertically pressed under the driving of the pneumatic device, so that the PCBA to be measured is contacted and pressed with the needle bed module 35, the top of the test probe 26 is exposed and contacted with the test point of the PCBA to be measured. When the needle bed module 35 is replaced, the plug-in handle 5 is pulled, the needle bed module tray 4 is slid out through the needle bed module tray sliding guide rail 12, and the needle bed module 35 is quickly replaced.

Claims

1. A quick-changeable PCBA test tool, characterized in that, The lower machine (37), the tooling frame (36) and the needle bed module (35) are included. The lower machine (37) includes a lower machine body (1), a backboard (2) placed perpendicularly to the inner bottom surface of the lower machine body (1) and extended from the inside of the lower machine body (1) to the outside of the lower machine body (1), and a plurality of needle bed module connector female heads (3) mounted on the backboard (2) and located outside the lower machine body; the lower machine body (1) includes a plurality of clamping grooves (38) and intelligent plug-ins (39) inserted into the inside of the lower machine body (1) through the clamping grooves (38); the intelligent plug-ins (39) are connected with the backboard (2); the backboard (2) is provided with a CAN bus to control and manage the intelligent plug-ins (39); the signal source and loop of the intelligent plug-ins (39) are placed in the needle bed module connector female heads (3); The tooling frame (36) is provided with a cavity accommodating the lower machine body (1), and the upper surface of the tooling frame (36) is provided with a needle bed module tray (4) surrounding the cavity and a needle bed module tray sliding guide rail (12) located at the side edge of the needle bed module tray (4); The needle bed module (35) is provided with a bottom plate PCB (31), test probes (26) and a plurality of needle bed module connector male heads (32); during testing, one end of the test probe (26) is in contact with the test point of the PCBA to be tested, and the other end is in contact with the signal source contact on the bottom plate PCB (31); the needle bed module connector male head (32) is provided with a PIN pin inside; the signal source contact on the bottom plate PCB (31) is connected with the PIN pin of the needle bed module connector male head (32) through PCB wiring; The lower machine body (1) is installed in the cavity of the tooling frame (36), the needle bed module (35) is installed on the needle bed module tray (4) by being in contact with the needle bed module tray (4) through the bottom plate PCB (31), and the needle bed module connector female head (3) is connected with the needle bed module connector male head (32); when the needle bed module (35) is replaced, the needle bed module tray (4) is slid out through the needle bed module tray sliding guide rail (12).

2. The PCBA test fixture of claim 1, wherein, The needle bed module (35) includes a bottom plate PCB (31), a bearing plate (30), a test probe fixing plate (22), a pressing support plate (24), test probes (26) and needle bed module connector male heads (32); one side of the bearing plate (30) is attached to the bottom plate PCB (31), and the other side is provided with a groove; the test probe fixing plate (22) is installed in the groove through screws in the fixing screw holes (21); the needle bed module (35) is provided with a spring (28); the pressing support plate (24) is installed on the test probe fixing plate (22) through guide columns, screws and the spring (28); the test probes (26) are installed on the test probe fixing plate (22), one end of the test probe (26) penetrates through the bearing plate (30), and the other end penetrates through the pressing support plate (24); The lower pressing support plate (24) is provided with a through hole for the test probe (26) to pass through, and is also provided with a PCBA side limiting block (23), a limiting pin (25) and a conical positioning pin (27); during testing, the PCBA to be tested is fixed in the area defined by the PCBA side limiting block (23) and the positioning pin (27), and is positioned by the limiting pin (25); the surface of the test probe fixing plate (22) near the lower pressing support plate (24) is provided with a plurality of needle bed module positioning holes (29); during testing, a PCBA pressing module (33) is arranged on the assembly line, the support of the PCBA pressing module (33) is aligned with the needle bed module positioning hole (29); and the bearing plate (30) is provided with a plurality of needle bed module handles (20).

3. The PCBA test fixture of claim 2, wherein, The top end of the test probe (26) is lower than the side of the lower pressing support plate (24) away from the test probe fixing plate (22) in a natural state; during testing, the PCBA pressing module (33) is in contact with the lower pressing support plate (24) and is pressed tightly, and the top end of the test probe (26) is exposed and in contact with the test point of the PCBA to be tested.

4. The PCBA test fixture of claim 3, wherein, The tool frame (36) includes a machine frame right baffle (7), a machine frame left baffle (15), a machine frame rear baffle (10) and a machine frame front opening door (18); the machine frame right baffle (7), the machine frame left baffle (15), the machine frame rear baffle (10) and the machine frame front opening door (18) surround to form a cavity for accommodating the lower machine body (1); The machine frame rear baffle (10) is provided with a back plate mounting strip (8) at the upper part; after the lower machine body (1) is placed in the tool frame (36), the back plate mounting strip (8) and the plate surface of the back plate (2) extending to the outside of the lower machine body (1) are flush in height; the back plate mounting strip (8) is fixed to the machine frame rear baffle (10) by a back plate mounting strip support column (9); the machine frame front opening door (18) is provided with a machine frame front opening door handle (19); and the machine frame right baffle (7) and the machine frame left baffle (15) are each provided with three through holes at the lower part.

5. The PCBA test fixture of claim 4, wherein, One side of the needle bed module tray (4) is in contact with the machine frame right baffle (7) and the machine frame left baffle (15), and is fixed and installed by a fastening nut (14) vertically penetrating through the machine frame rear baffle (10); the needle bed module tray (4) is provided with a plug-in handle (5).

6. The PCBA test fixture of claim 5, wherein, The needle bed module tray (4) is provided with a plurality of needle bed module limiting blocks (6), and the machine frame rear baffle (10) is provided with a needle bed module upper limiting block (11); when the needle bed module (35) is installed on the needle bed module tray (4), the bearing plate (30) is fixed in the area defined by the needle bed module limiting block (6), and the lower surface of the needle bed module upper limiting block (11) is in contact with the upper surface of the bearing plate (30).

7. The PCBA test fixture of claim 6, wherein, The needle bed module tray sliding guide rail (12) is provided with a small protrusion at one end close to the machine frame rear baffle (10), and the needle bed module tray (4) is provided with a sliding limiting block (13) on the lower bottom surface close to the two side edges of the needle bed module tray sliding guide rail (12); the machine frame right baffle (7) and the machine frame left baffle (15) are both provided with a needle bed module side limiting block (16) and a needle bed module tray limiting snap (17), and the needle bed module tray limiting snap (17) fixes the position of the needle bed module tray (4); When the needle bed module (35) is replaced, the needle bed module tray limiting snap (17) is loosened, the plug-in handle (5) is pulled, the needle bed module tray (4) slides through the needle bed module tray sliding guide rail (12), the small protrusion on the needle bed module tray sliding guide rail (12) contacts the needle bed module side limiting block (16) to limit the position of the needle bed module tray (4) after being pulled out, and the sliding limiting block (13) limits the insertion position of the needle bed module tray (4).

8. The PCBA test fixture of claim 7, wherein, The bottom plate PCB (31) is provided with an RFID on the side in contact with the needle bed module tray (4), and the intelligent plug-in (39) is provided with a card reader, so that when the needle bed module (35) is installed on the needle bed module tray (4), the RFID is aligned with the position of the card reader, the card reader reads the RFID information, automatically identifies the type of the needle bed module (35), and matches the supported PCBA model to be tested.

9. The PCBA test fixture of claim 8, wherein, The lower computer main body (1) is provided with a bar code scanning gun interface, the bar code scanning gun is externally connected to the outside of the lower computer main body (1) through the interface, the bar code scanning gun reads the bar code information of the PCBA to be tested, obtains the model of the PCBA to be tested, and compares and verifies the model of the PCBA to be tested with the model of the PCBA to be tested supported by the needle bed module (35).

10. The PCBA test fixture of claim 1, wherein, The test probe (26) is a double-head probe with a spring.

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