CN210293870U

CN210293870U - Testing machine for lead frame

Info

Publication number: CN210293870U
Application number: CN201921099228.5U
Authority: CN
Inventors: 刘德强
Original assignee: Shenzhen Shengyuan Semiconductors Co ltd
Current assignee: Shenzhen Shengyuan Semiconductors Co ltd
Priority date: 2019-07-13
Filing date: 2019-07-13
Publication date: 2020-04-10
Anticipated expiration: 2029-07-13

Abstract

The utility model relates to a testing machine for a lead frame, which comprises a frame body; the upper surface of the frame body is symmetrically provided with horizontal plates, and the lead frame is lapped on the two horizontal plates; one side of the horizontal plate, which is back to the frame body, is provided with a pressing mechanism, and the pressing mechanism is used for pressing the lead frame against one side of the horizontal plate, which is back to the frame body; the frame body is provided with a pushing mechanism, the pushing mechanism faces one side of the two horizontal plates, and the pushing mechanism is used for pushing the lead frame to the two horizontal plates; the frame body is provided with a vertical plate positioned at the back side of the two horizontal plates; the vertical plate is provided with a first detection mechanism and a second detection mechanism at intervals along the horizontal direction; for the same substrate, the first detection mechanism and the second detection mechanism are respectively used for detecting the welding strength of the two leads; the driving mechanism is used for driving the substrates on the lead frame to move towards the first detection mechanism and the second detection mechanism one by one. The utility model discloses the effect of the judgement of lead wire welding strength has been standardized.

Description

Testing machine for lead frame

Technical Field

The utility model belongs to the technical field of the technique of lead wire strength test and specifically relates to a test machine for lead frame is related to.

Background

The lead frame is used as a chip carrier of an integrated circuit, is a key structural member for realizing the electrical connection between a leading-out end of an internal circuit of a chip and an external lead by means of bonding materials (gold wires, aluminum wires and copper wires) to form an electrical circuit, plays a role of a bridge connected with an external lead, needs to be used in most semiconductor integrated blocks and is an important basic material in the electronic information industry. The lead is a lead wire led out from the inside of the component package, and in the case of surface-mount components, the lead wire refers to a generic name of an external lead such as a wing lead, a J-lead, or an I-lead.

The lead frame consists of a plurality of substrates, wherein the substrates are provided with chips and pins, the pins and the chips are connected through leads, and two ends of the leads are respectively welded on the pins and the chips; two leads are symmetrically welded on one chip, and a gap is formed between each lead and the substrate.

The working principle of wire bonding is as follows: at room temperature, the two materials are cold welded together under the combined action of pressure and ultrasonic waves, the two materials are firstly pressed together by using a cleaver, the material is softened by the ultrasonic vibration of the cleaver, and molecules are diffused into the other material, so that the welding of the lead is realized.

The strength of the lead welding part is particularly critical, and electronic component products with cold joint flow into an application end and are installed on equipment to influence the performance of the equipment, so that great loss can be caused, such as abnormal and unstable operation of the whole machine. In the prior art, whether the welding strength of the welding position of the lead wire meets the standard or not is roughly judged only by pulling the lead wire by a tester by hands or observing the welding point by naked eyes; however, this method is not suitable for batch detection, and the tension applied to each lead wire cannot be kept constant all the time, so that the judgment of the welding strength of the lead wires is not standardized, and products with cold joints cannot be effectively removed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a test machine for lead frame, the test principle adopts equipment to set for the pulling force size, when the lead wire has the rosin joint, this pulling force can pull the lead wire and drop, and is qualified when lead wire welding strength, this power can not pull the lead wire and drop. The product that the lead wire pulled off also can be processed downwards, and the last product detects out the bad, rejects in the electric property that opens circuit to prevent that the electronic components product that has the rosin joint from flowing into the application end, adopts equipment automation detection method, every lead wire of detectable, furthest prevents that the rosin joint electronic components product from flowing into the application end. It has the advantage of normalizing the determination of the wire bond strength.

The utility model aims at realizing through the following technical scheme: a testing machine for lead frames comprises a frame body; the upper surface of the frame body is symmetrically provided with horizontal plates, and the lead frame is lapped on the two horizontal plates; one side of the horizontal plate, which is back to the frame body, is provided with a pressing mechanism, and the pressing mechanism is used for pressing the lead frame against one side of the horizontal plate, which is back to the frame body; the frame body is provided with a pushing mechanism, the pushing mechanism faces one side of the two horizontal plates, and the pushing mechanism is used for pushing the lead frame to the two horizontal plates; the frame body is provided with a vertical plate positioned at the back side of the two horizontal plates; the vertical plate is provided with a first detection mechanism and a second detection mechanism at intervals along the horizontal direction; for the same substrate, the first detection mechanism and the second detection mechanism are respectively used for detecting the welding strength of the two leads; the frame body is provided with a driving mechanism positioned between the two horizontal plates, and the driving mechanism is used for driving the substrates on the lead frame to move towards the first detection mechanism and the second detection mechanism one by one.

By adopting the technical scheme, when the welding strength of the lead on the lead frame is detected, firstly, the lead frame is pushed to be overlapped between the two horizontal plates by the pushing mechanism, and meanwhile, the lead frame is pressed on the horizontal plates by the pressing mechanism; secondly, the driving mechanism drives the substrates on the lead frame to the first detection mechanism and the second detection mechanism one by one; finally, the first detection mechanism and the second detection mechanism respectively detect the welding strength of the two leads on the same substrate; compared with the prior art, the utility model discloses in, through foretell settlement, reached the purpose of standardizing lead wire welding strength's judgement.

The utility model discloses further set up to: the first detection mechanism includes: the device comprises a first base, a first chamber, a first rotating shaft, a first servo motor, a first vertical rod, a first hook and a first lifting assembly; the first base is arranged on one side, facing the horizontal plate, of the vertical plate; the first chamber is arranged in the first base; the first rotating shaft is horizontal, one end of the first rotating shaft is positioned above the middle position of the two horizontal plates, and the other end of the first rotating shaft extends into the first cavity and is connected with a first servo motor arranged on one side of the first cavity, which is far away from the horizontal plates; the first vertical rod is vertically arranged on one side of the first rotating shaft, which is far away from the first base, and extends towards the frame body; the first hook is arranged on one side of the first vertical rod far away from the first rotating shaft, and the inner side of the first hook faces away from the pushing mechanism; the first servo motor and the first rotating shaft are vertically assembled on the first base in a sliding mode; the first lifting assembly is used for driving the first servo motor and the first rotating shaft to vertically reciprocate.

By adopting the technical scheme, the rotation of the output shaft of the first servo motor drives the rotation of the first rotating shaft, so that the first hook is driven to rotate until the first hook rotates to a position between the upper surface of the base plate and the lead wire, close to the pushing mechanism, on the base plate, the first lifting assembly drives the first servo motor and the first rotating shaft to move upwards, so that the first hook is driven to move upwards and pull the lead wire, and the strength of the lead wire welding position is detected; then, the first lifting assembly drives the first servo motor and the first rotating shaft to move downwards, and further drives the first hook to move downwards until the first hook is positioned between the lead and the substrate; and finally, the first servo motor works to drive the first rotating shaft to rotate, so that the first hook is driven to rotate towards the pushing mechanism until the first hook is pulled out from between the lead and the substrate and is higher than the lead.

The utility model discloses further set up to: a sliding groove is vertically formed in the inner wall, away from the horizontal plate, of the first cavity, and a sliding block which is assembled in the sliding groove in a sliding mode is arranged on one side, back to the first rotating shaft, of the first servo motor; a first through groove in sliding fit with the first rotating shaft is vertically formed in the inner wall, close to the horizontal plate, of the first cavity; the first lifting assembly comprises: the device comprises a first motor, a first cam and a first mounting plate; the first mounting plate is arranged on one side, facing the frame body, of the first servo motor; the first motor is arranged on one side of the first cavity far away from the horizontal plate, and an output shaft of the first motor is parallel to the axis of the first rotating shaft; the first cam is arranged on the output shaft of the first motor and is abutted against one side, facing the frame body, of the first mounting plate.

By adopting the technical scheme, the rotation of the output shaft of the first motor drives the first cam to rotate, and when the first cam rotates, the first mounting plate is driven to move upwards at first, so that the first servo motor and the first rotating shaft are driven to move upwards; after the first mounting plate moves to the highest point, the first servo motor and the first rotating shaft move downwards under the action of the gravity of the first servo motor and the first rotating shaft.

The utility model discloses further set up to: the second detection mechanism includes: the second base, the second chamber, the second rotating shaft, the second servo motor, the second vertical rod, the second hook and the second lifting assembly; the second base is arranged on one side, facing the horizontal plate, of the vertical plate; the second chamber is arranged in the second base; the second rotating shaft is horizontal, one end of the second rotating shaft is positioned above the middle position of the two horizontal plates, and the other end of the second rotating shaft extends into the second cavity and is connected with a second servo motor arranged on one side of the second cavity far away from the horizontal plates; the second vertical rod is vertically arranged on one side of the second rotating shaft, which is far away from the second base, and extends towards the frame body; the second hook is arranged on one side, away from the second rotating shaft, of the second vertical rod, and the inner side of the second hook faces the pushing mechanism; the second servo motor and the second rotating shaft are vertically assembled on the second base in a sliding mode; the second lifting assembly is used for driving the second servo motor and the second rotating shaft to vertically reciprocate.

By adopting the technical scheme, the rotation of the output shaft of the second servo motor drives the rotation of the second rotating shaft so as to drive the second hook to rotate until the second hook rotates to a position between the upper surface of the base plate and the lead wire on the base plate, which is far away from the pushing mechanism, the second lifting assembly drives the second servo motor and the second rotating shaft to move upwards so as to drive the second hook to move upwards and pull the lead wire, so that the strength of the lead wire welding position is detected; then, the second lifting assembly drives the second servo motor and the second rotating shaft to move downwards, and further drives the second hook to move downwards until the second hook is positioned between the lead and the substrate; and finally, the second servo motor works to drive the second rotating shaft to rotate, so that the second hook is driven to rotate back to the pushing mechanism until the second hook is pulled out from between the lead and the substrate and is higher than the lead.

The utility model discloses further set up to: a sliding groove is vertically formed in the inner wall, away from the horizontal plate, of the second cavity, and a sliding block which is assembled in the sliding groove in a sliding mode is arranged on one side, back to the second rotating shaft, of the second servo motor; a second through groove in sliding fit with the second rotating shaft is vertically formed in the inner wall, close to the horizontal plate, of the second chamber; the second lifting assembly comprises: the second motor, the second cam and the second mounting plate; the second mounting plate is arranged on one side, facing the frame body, of the second servo motor; the second motor is arranged on one side of the second cavity far away from the horizontal plate, and an output shaft of the second motor is parallel to the axis of the second rotating shaft; the second cam is arranged on the output shaft of the second motor and is abutted against one side, facing the rack body, of the second mounting plate.

By adopting the technical scheme, the rotation of the output shaft of the second motor drives the rotation of the second cam, and when the second cam rotates, the second mounting plate is driven to move upwards at first, so that the second servo motor and the second rotating shaft are driven to move upwards; after the second mounting plate moves to the highest point, the second servo motor and the second rotating shaft move downwards under the action of the gravity of the second servo motor and the second rotating shaft.

The utility model discloses further set up to: the pushing mechanism includes: the device comprises a base plate, a pushing cylinder and a push plate; the base plate is arranged on the frame body and faces to one side of the two horizontal plates which are parallel and level; the pushing cylinder is arranged on one side of the base plate, which is back to the frame body, and the piston end of the pushing cylinder vertically faces to one side of the two horizontal plates, which is parallel and level with each other, and is connected with a pushing plate.

Through adopting above-mentioned technical scheme, at first put the lead frame on the base plate to make the lead frame be in between two horizontal plates, promote the extension of cylinder piston end, the drive push pedal moves towards the horizontal plate, and then with lead frame propelling movement to overlap joint on two horizontal plates, later by actuating mechanism with the drive of lead frame towards first detection mechanism and second detection mechanism again.

The utility model discloses further set up to: the driving mechanism comprises; the device comprises a groove, a sliding plate, a mounting groove, a connecting rod, a first push rod, a second push rod, a lifting cylinder and a driving cylinder; the groove is arranged on the frame body and is positioned between the two horizontal plates; the sliding plate is in sliding butt joint with the inner wall, close to the ground, of the groove, and slides back and forth along the conveying direction of the lead frame; the mounting groove is arranged on one side of the sliding plate, which is far away from the ground; a lifting cylinder with a piston end vertically upwards is arranged on the bottom wall of the mounting groove; the connecting rod is parallel to the horizontal plate and is arranged on the piston end of the lifting cylinder; the first push rod and the second push rod are oppositely arranged on two sides of the connecting rod, which are back to the lifting cylinder, the first push rod is positioned on one side of the first detection mechanism, which faces the pushing mechanism, and the second push rod is positioned between the first detection mechanism and the second detection mechanism; the driving cylinder is arranged on the inner wall of the groove, and the piston end of the driving cylinder is vertically connected to the vertical side of the sliding plate facing to or back to the pushing mechanism.

By adopting the technical scheme, after the lead frame is pushed onto the horizontal plate by the pushing mechanism, the substrate, far away from the pushing mechanism, on the lead frame is positioned below the first detection mechanism, and the first detection mechanism detects the lead on the substrate; and then: firstly, the method comprises the following steps: the lifting cylinder works to drive the first push rod to ascend to a position between the base plate far away from the pushing mechanism and the adjacent base plate, the driving cylinder drives the sliding plate to move back to the pushing mechanism, the base plate far away from the pushing mechanism is driven by the first push rod to move away from the lower part of the first detection mechanism, the adjacent base plate is driven to move to the lower part of the first detection mechanism, then the lifting cylinder works to drive the first push rod to descend into the installation groove, and the driving cylinder drives the sliding plate to move towards the pushing mechanism until the first push rod is located at the initial position; secondly, the method comprises the following steps: the first step is repeated until the substrate far away from the pushing mechanism is positioned below the second detection mechanism, the lifting cylinder drives the first pushing rod to lift and simultaneously drives the second pushing rod to lift between two adjacent substrates below the second detection mechanism, the substrate far away from the pushing mechanism is driven by the second pushing rod to move away from the lower part of the second detection mechanism when the first step is carried out, the adjacent substrates are moved to the lower part of the second detection mechanism, the first pushing rod is reset, the second pushing rod is reset together, the steps are repeated, and the lead frame is pushed along the horizontal plate.

The utility model discloses further set up to: the pressing mechanism comprises a fixed rod and a pressing wheel; at least two fixed rods are uniformly arranged on one side of the horizontal plate back to the frame body at intervals and extend to the position between the two horizontal plates; the pressing wheel is sleeved on the fixed rod and is positioned above the middle position of the two horizontal plates.

Through adopting above-mentioned technical scheme, at the in-process that the lead frame was carried, support the press wheel and support the pressure to the lead frame for the lead frame supports the butt all the time in the one side that two horizontal plates dorsad ground.

To sum up, the utility model discloses a beneficial technological effect does:

when the welding strength of the lead on the lead frame is detected, firstly, the lead frame is pushed to be overlapped between two horizontal plates by the pushing mechanism, and meanwhile, the lead frame is pressed on the horizontal plates by the pressing mechanism; secondly, the driving mechanism drives the substrates on the lead frame to the first detection mechanism and the second detection mechanism one by one; finally, the first detection mechanism and the second detection mechanism respectively detect the welding strength of the two leads on the same substrate; compared with the prior art, the utility model discloses in, through foretell settlement, reached the purpose of standardizing lead wire welding strength's judgement.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 a is an enlarged schematic view of a portion a of fig. 1.

Fig. 2B is an enlarged schematic structural view of a portion B in fig. 1.

Fig. 3 is a schematic cross-sectional view of the plane C-C in fig. 1.

Fig. 4 is an enlarged schematic view of a portion a of fig. 3.

Fig. 5 is a schematic cross-sectional view of the D-D surface of fig. 1.

Fig. 6 is an enlarged schematic view of a portion a of fig. 5.

Fig. 7 is a schematic structural view of the drive mechanism.

In the figure, 11, a frame body; 12. a horizontal plate; 13. a vertical plate; 2. a pressing mechanism; 21. fixing the rod; 22. a fixing plate; 23. pressing the wheel; 3. a pushing mechanism; 31. a substrate; 32. a push cylinder; 33. pushing the plate; 4. a first detection mechanism; 41. a first base; 42. a first chamber; 43. a first rotating shaft; 44. a first servo motor; 45. a first vertical bar; 46. a first hook; 47. a first lifting assembly; 471. a first motor; 472. a first cam; 473. a first mounting plate; 51. a chute; 52. a first through groove; 6. a second detection mechanism; 61. a second base; 62. a second chamber; 63. a second rotating shaft; 64. a second servo motor; 65. a second vertical bar; 66. a second hook; 67. a second lifting assembly; 671. a second motor; 672. a second cam; 673. a second mounting plate; 71. a sliding groove; 72. a slider; 73. a second through groove; 8. a drive mechanism; 81. a groove; 82. a sliding plate; 83. mounting grooves; 84. a connecting rod; 85. a first push rod; 86. a second push rod; 87. a lifting cylinder; 88. the cylinder is driven.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, for the utility model discloses a test machine for lead frame, include: a frame body 11 and a horizontal plate 12. The frame body 11 is rectangular; the horizontal plates 12 are rectangular, two rectangular plates are symmetrically arranged on one side of the frame body 11 back to the ground, and two ends of the lead frame are lapped on the two horizontal plates 12. The opposite sides of the two horizontal plates 12 are horizontally provided with lap gaps communicated with the upper surfaces of the horizontal plates 12.

As shown in fig. 1, the present invention further comprises a pressing mechanism 2. Support and press mechanism 2 and install one side at horizontal plate 12 dorsad support body 11, its effect does: the lead frame is pressed against the side of the horizontal plate 12 opposite to the frame body 11, so that the lead frame is always abutted against the horizontal plate 12.

As shown in fig. 1, the pressing mechanism 2 includes: a fixing rod 21, a fixing plate 22 and an abutting wheel 23. The fixing rods 21 are horizontal, the fixing rods 21 are perpendicular to the horizontal plates 12, and the three fixing rods 21 are uniformly erected on one side of the horizontal plate 12, which is back to the frame body 11, at intervals and extend to a position between the two horizontal plates 12; the fixing plate 22 is vertical, and the fixing plate 22 is installed between one side of the fixing rod 21 facing the frame body 11 and the upper surface of the horizontal plate 12; the pressing wheel 23 is a plastic wheel, the pressing wheel 23 is sleeved on the fixing rod 21 and is positioned above the middle position of the two horizontal plates 12, and the inner diameter side of the pressing wheel 23 is fixed on the fixing rod 21. The lead frame is always abutted between one side of the pressing wheel 23 facing the frame body 11 and one side of the horizontal plate 12 opposite to the ground.

As shown in fig. 1, the present invention further includes a pushing mechanism 3. Pushing mechanism 3 installs at 11 upper surfaces of support body, and pushing mechanism 3 is towards one side of two horizontal plates 12 looks parallel and level, and its effect is: the lead frame is pushed to overlap the two horizontal plates 12.

As shown in fig. 1, the pushing mechanism 3 includes: a base plate 31, a push cylinder 32, and a push plate 33. The base plate 31 is installed on the frame body 11 and faces to one side of the two horizontal plates 12; the pushing cylinder 32 is installed on one side of the base plate 31, which is back to the frame body 11, the piston end of the pushing cylinder 32 is horizontal, and the pushing cylinder 32 vertically faces between the two parallel sides of the two horizontal plates 12; the push plate 33 slides against the base plate 31, and the push plate 33 is vertically mounted on the piston end of the push cylinder 32.

As shown in fig. 2 and 4, the present invention further includes a vertical plate 13, a first detecting mechanism 4, and a second detecting mechanism 6.

The vertical plate 13 is arranged on the frame body 11, the vertical plate 13 is vertical, and the vertical plate 13 is parallel to the horizontal plate 12; the first detection mechanism 4 and the second detection mechanism 6 are arranged on one side, facing the horizontal plate 12, of the vertical plate 13, the first detection mechanism 4 and the second detection mechanism 6 are arranged at intervals along the horizontal direction, the first detection mechanism 4 is close to the pushing mechanism 3, and the second detection mechanism 6 is far away from the pushing mechanism 3; the first detection mechanism 4 and the second detection mechanism 6 function as: the first detection means 4 and the second detection means 6 are used for detecting the bonding strength of two leads on the same substrate 31, respectively.

As shown in fig. 2 and 4, the first detection mechanism 4 includes: the first base 41, the first chamber 42, the first shaft 43, the first servo motor 44, the first vertical rod 45, the first hook 46 and the first lifting assembly 47.

The first base 41 is installed on the side of the vertical plate 13 facing the horizontal plate 12; the first chamber 42 is opened in the first base 41; the first rotating shaft 43 is horizontal, the first rotating shaft 43 is cylindrical, the first rotating shaft 43 is perpendicular to the horizontal plates 12, one end of the first rotating shaft 43 is positioned above the middle position of the two horizontal plates 12, and the other end of the first rotating shaft 43 extends into the first cavity 42; the first servo motor 44 is arranged on the first servo motor 44 on one side of the first cavity 42 far away from the horizontal plate 12, and the axis of the output shaft of the first servo motor 44 is coaxially connected with one end of the first rotating shaft 43 extending into the first cavity 42; the first vertical rod 45 is vertically installed on one side of the first rotating shaft 43 away from the first base 41 and extends towards the frame body 11; the first hook 46 is L-shaped, the first hook 46 is arranged at the lower end of the first vertical rod 45 far away from the first rotating shaft 43, and the inner side of the first hook 46 faces away from the pushing mechanism 3; the first servo motor 44 and the first rotating shaft 43 are vertically connected to the first base 41 in a sliding manner; a first lifting mechanism is mounted on the inner wall of the first chamber 42 remote from the horizontal plate 12 and functions to: the first servo motor 44 and the first rotating shaft 43 are driven to reciprocate vertically.

As shown in fig. 4, the present invention further includes: a slide groove 51, a slider (not shown), and a first through groove 52. The chute 51 is vertically arranged on the inner wall of the first chamber 42 far away from the horizontal plate 12; the sliding block is arranged on one side of the first servo motor 44, which faces away from the first rotating shaft 43, and is connected in the sliding groove 51 in a sliding manner and abutted against the inner wall of the sliding groove 51; the first through groove 52 is vertically formed on the inner wall of the first chamber 42 close to the horizontal plate 12, and the first through groove 52 is vertically matched with the first rotating shaft 43 in a sliding mode.

As shown in fig. 4, the first elevating assembly 47 includes: a first motor 471, a first cam 472, and a first mounting plate 473. A first mounting plate 473 is installed at a side of the first servo motor 44 facing the frame body 11, the first mounting plate 473 being out of contact with the inner wall of the first chamber 42; the first motor 471 is installed at one side of the first chamber 42 far away from the horizontal plate 12, and the output shaft of the first motor 471 is parallel to the axis of the first rotating shaft 43; the first cam 472 is coaxially installed on the output shaft of the first motor 471, and the first cam 472 abuts against the side of the first installation plate 473 facing the frame body 11.

As shown in fig. 2 and 6, the second detection mechanism 6 includes: a second base 61, a second chamber 62, a second rotating shaft 63, a second servo motor 64, a second vertical rod 65, a second hook 66 and a second lifting assembly 67.

The second base 61 is installed on one side of the vertical plate 13 facing the horizontal plate 12, and the second base 61 is positioned on one side of the first base 41 facing away from the pushing mechanism 3; the second chamber 62 is opened in the second base 61; the second rotating shaft 63 is horizontal, the second rotating shaft 63 is cylindrical, the second rotating shaft 63 is perpendicular to the horizontal plates 12, one end of the second rotating shaft 63 is positioned above the middle position of the two horizontal plates 12, and the other end of the second rotating shaft 63 extends into the second cavity 62; the second servo motor 64 is arranged on the second cavity 62 far away from the second servo motor 64 on one side of the horizontal plate 12, and the axis of the output shaft of the second servo motor 64 is coaxially connected with one end of the second rotating shaft 63 extending into the second cavity 62; the second vertical rod 65 is vertically installed on one side of the second rotating shaft 63 far away from the second base 61 and extends towards the frame body 11; the second hook 66 is L-shaped, the second hook 66 is mounted at the lower end of the second vertical rod 65 far away from the second rotating shaft 63, and the inner side of the second hook 66 faces the pushing mechanism 3; the second servo motor 64 and the second rotating shaft 63 are vertically connected to the second base 61 in a sliding manner; the second lifting mechanism is mounted on the inner wall of the second chamber 62 remote from the horizontal plate 12 and functions to: the second servo motor 64 and the second rotating shaft 63 are driven to reciprocate vertically.

As shown in fig. 6, the present invention further includes: a slide groove 71, a slide block 72, and a second through groove 73. The sliding groove 71 is vertically arranged on the inner wall of the second chamber 62 far away from the horizontal plate 12; the sliding block 72 is installed on one side of the second servo motor 64, which is opposite to the second rotating shaft 63, the sliding block 72 is connected in the sliding groove 71 in a sliding mode, and the sliding block 72 abuts against the inner wall of the sliding groove 71; the second through groove 73 is vertically formed in the inner wall of the second chamber 62 close to the horizontal plate 12, and the second rotating shaft 63 is vertically connected with the second through groove 73 in a sliding manner.

As shown in fig. 6, the second elevating assembly 67 includes: a second motor 671, a second cam 672, and a second mounting plate 673. The second mounting plate 673 is mounted on one side of the second servo motor 64 facing the frame body 11, and the second mounting plate 673 is not in contact with the inner wall of the second chamber 62; the second motor 671 is arranged on one side of the second chamber 62 far away from the horizontal plate 12, and the output shaft of the second motor 671 is parallel to the axis of the second rotating shaft 63; the second cam 672 is coaxially mounted on the output shaft of the second motor 671, and the second cam 672 abuts on the side of the second mounting plate 673 facing the frame body 11.

As shown in fig. 7, the present invention further includes a driving mechanism 8. The drive mechanism 8 includes; the device comprises a groove 81, a sliding plate 82, a mounting groove 83, a connecting rod 84, a first push rod 85, a second push rod 86, a lifting cylinder 87 and a driving cylinder 88.

The groove 81 is rectangular, and the groove 81 is arranged on the frame body 11 and is positioned between the two horizontal plates 12; the lower surface of the sliding plate 82 is in sliding contact with the inner wall of the groove 81 close to the ground along the direction parallel to the horizontal plate 12, and the sliding plate 82 slides back and forth along the conveying direction of the lead frame; the mounting groove 83 is arranged on one side of the sliding plate 82 far away from the ground; the piston end of the lifting cylinder 87 is vertically upward, and the bottom of the lifting cylinder 87 is arranged at the midpoint of the bottom wall of the mounting groove 83;

the connecting rod 84 is parallel to the horizontal plate 12, and the midpoint of the connecting rod 84 is arranged on the piston end of the lifting cylinder 87; a first push rod 85 and a second push rod 86 are oppositely arranged on two sides of the connecting rod 84, which are back to the lifting cylinder 87, the first push rod 85 is positioned on one side of the first detection mechanism 4 facing the pushing mechanism 3, and the second push rod 86 is positioned between the first detection mechanism 4 and the second detection mechanism 6; a driving cylinder 88 is mounted on the inner wall of the groove 81, and the piston end of the driving cylinder 88 is vertically connected to the vertical side of the slide plate 82 facing the pushing mechanism 3.

The distance between the first detection mechanism 4 and the second detection mechanism 6 is integral multiple of the distance between two connected substrates.

The cylinder and the motor in the embodiment are controlled by the switch.

The implementation principle of the embodiment is as follows:

when detecting the welding strength of the lead on the lead frame:

firstly, the method comprises the following steps: the pushing mechanism 3 pushes the lead frame to be overlapped between the two horizontal plates 12; the pushing cylinder 32 extends, and the lead frame is conveyed to be overlapped on the two horizontal plates 12 through the pushing plate 33; a lead wire close to the pushing cylinder 32 on the substrate far away from the pushing cylinder 32 is positioned right below the first detection mechanism 4;

secondly, the method comprises the following steps: when the first detection mechanism 4 works, the rotation of the output shaft of the first servo motor 44 drives the rotation of the first rotating shaft 43, and further drives the first hook 46 to rotate until the first hook 46 rotates to a position between the upper surface of the substrate 31 and a lead wire on the substrate 31 close to the pushing mechanism 3; when the first lifting assembly 47 works, the rotation of the output shaft of the first motor 471 drives the first cam 472 to rotate, the rotation of the first cam 472 drives the first servo motor 44 and the first rotating shaft 43 to move upwards, and further drives the first hook 46 to move upwards and pull the lead, so that the strength of the lead welding position is detected; then, after the first mounting plate 473 moves to the highest point, under the action of the gravity of the first servo motor 44 and the first rotating shaft 43, the first servo motor 44 and the first rotating shaft 43 move downward, and further the first hook 46 is driven to move downward until the first hook is located between the lead and the substrate 31; finally, the first servo motor 44 works to drive the first rotating shaft 43 to rotate, and further drive the first hook 46 to rotate towards the pushing mechanism 3 until the first hook 46 is drawn out from between the lead and the substrate 31 and is higher than the lead; the pressing mechanism 2 always presses the lead frame against the horizontal plate 12;

thirdly, the method comprises the following steps: the driving mechanism 8 works, the substrate detected by the first detection mechanism 4 is driven to the second detection mechanism 6 for detection, and the substrate adjacent to the detected substrate is driven to the first detection mechanism 4 for detection; the lifting cylinder 87 works to drive the first push rod 85 to ascend to a position between the base plate 31 far away from the pushing mechanism 3 and the adjacent base plate 31, the driving cylinder 88 drives the sliding plate 82 to move back to the pushing mechanism 3, the base plate 31 detected by the first detection mechanism 4 is driven to move away from the lower part of the first detection mechanism 4 through the first push rod 85, the adjacent base plate 31 is driven to move to the lower part of the first detection mechanism 4, then the lifting cylinder 87 works to drive the first push rod 85 to descend into the mounting groove 83, and the driving cylinder 88 drives the sliding plate 82 to move towards the pushing mechanism 3 until the first push rod 85 is located at the initial position; the above process is repeated until the substrate 31 far away from the pushing mechanism 3 is positioned below the second detection mechanism 6, the lifting cylinder 87 drives the first pushing rod to lift and simultaneously drive the second pushing rod to lift to a position between two adjacent substrates 31 below the second detection mechanism 6, the first pushing rod 85 drives the substrate 31 far away from the pushing mechanism 3 to move away from the position below the second detection mechanism 6 through the second pushing rod 86 when working, the adjacent substrates 31 move to the position below the second detection mechanism 6, and the second pushing rod 86 is reset together when the first pushing rod 85 is reset, so that the lead frame is pushed along the horizontal plate 12 repeatedly;

fourthly: the second detection mechanism 6 works; the rotation of the output shaft of the second servo motor 64 drives the rotation of the second rotating shaft 63, and further drives the second hook 66 to rotate until the second hook 66 rotates to a position between the upper surface of the substrate 31 and the lead wire on the substrate 31 far away from the pushing mechanism 3; the second lifting assembly 67 works, the rotation of the second motor 671 drives the second cam 672 to rotate, the rotation of the second cam 672 drives the second servo motor 64 and the second rotating shaft 63 to move upwards, and further drives the second hook 66 to move upwards and pull the lead, so that the strength of the lead welding part is detected; then, after the second mounting plate 673 moves to the highest point, under the action of the self gravity of the second servo motor 64 and the second rotating shaft 63, the second servo motor 64 and the second rotating shaft 63 move downwards, and further the second hook 66 is driven to move downwards until the second hook is positioned between the lead and the substrate 31; finally, the second servo motor 64 works to drive the second rotating shaft 63 to rotate, and further drives the second hook 66 to rotate back to the pushing mechanism 3 until the second hook 66 is pulled out from between the lead and the substrate 31 and is higher than the lead.

Fifth, the method comprises the following steps: with the third process, the substrate 31 after completion of the detection is pushed out from the side of the horizontal plate 12 facing away from the pushing mechanism 3.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A testing machine for lead frames, characterized by comprising a frame body (11); horizontal plates (12) are symmetrically arranged on the upper surface of the frame body (11), and the lead frame is lapped on the two horizontal plates (12); one side of the horizontal plate (12) back to the frame body (11) is provided with a pressing mechanism (2), and the pressing mechanism (2) is used for pressing the lead frame against one side of the horizontal plate (12) back to the frame body (11); the frame body (11) is provided with a pushing mechanism (3), the pushing mechanism (3) faces one side of the two horizontal plates (12) which are parallel and level, and the pushing mechanism (3) is used for pushing the lead frame to the two horizontal plates (12); the frame body (11) is provided with a vertical plate (13) which is positioned at the opposite sides of the two horizontal plates (12); the vertical plate (13) is provided with a first detection mechanism (4) and a second detection mechanism (6) at intervals along the horizontal direction; for the same substrate (31), the first detection mechanism (4) and the second detection mechanism (6) are respectively used for detecting the welding strength of the two leads; the frame body (11) is provided with a driving mechanism (8) positioned between the two horizontal plates (12), and the driving mechanism (8) is used for driving the substrates (31) on the lead frame to move towards the first detection mechanism (4) and the second detection mechanism (6) one by one.

2. The testing machine for lead frames according to claim 1, characterized in that the first detection mechanism (4) comprises: the device comprises a first base (41), a first chamber (42), a first rotating shaft (43), a first servo motor (44), a first vertical rod (45), a first hook (46) and a first lifting assembly (47);

the first base (41) is arranged on one side, facing the horizontal plate (12), of the vertical plate (13); the first chamber (42) is arranged in the first base (41); the first rotating shaft (43) is horizontal, one end of the first rotating shaft (43) is positioned above the middle position of the two horizontal plates (12), and the other end of the first rotating shaft (43) extends into the first cavity (42) and is connected with a first servo motor (44) arranged on one side of the first cavity (42) far away from the horizontal plates (12); the first vertical rod (45) is vertically arranged on one side, away from the first base (41), of the first rotating shaft (43) and extends towards the frame body (11); the first hook (46) is arranged on one side of the first vertical rod (45) far away from the first rotating shaft (43), and the inner side of the first hook (46) faces back to the pushing mechanism (3); the first servo motor (44) and the first rotating shaft (43) are vertically assembled on the first base (41) in a sliding mode; the first lifting assembly (47) is used for driving the first servo motor (44) and the first rotating shaft (43) to vertically reciprocate.

3. The lead frame testing machine according to claim 2, wherein a sliding groove (51) is vertically formed in the inner wall of the first chamber (42) far away from the horizontal plate (12), and a sliding block which is slidably assembled in the sliding groove (51) is arranged on one side of the first servo motor (44) back to the first rotating shaft (43); a first through groove (52) matched with the first rotating shaft (43) in a sliding manner is vertically formed in the inner wall, close to the horizontal plate (12), of the first cavity (42); the first lifting assembly (47) comprises: a first motor (471), a first cam (472), and a first mounting plate (473); the first mounting plate (473) is arranged on one side, facing the rack body (11), of the first servo motor (44); the first motor (471) is arranged on one side of the first chamber (42) far away from the horizontal plate (12), and the output shaft of the first motor (471) is parallel to the axis of the first rotating shaft (43); the first cam (472) is arranged on an output shaft of the first motor (471), and the first cam (472) abuts against one side, facing the frame body (11), of the first mounting plate (473).

4. The testing machine for lead frames according to claim 1, characterized in that the second detection mechanism (6) comprises: the device comprises a second base (61), a second chamber (62), a second rotating shaft (63), a second servo motor (64), a second vertical rod (65), a second hook (66) and a second lifting assembly (67);

the second base (61) is arranged on one side, facing the horizontal plate (12), of the vertical plate (13); the second chamber (62) is arranged in the second base (61); the second rotating shaft (63) is horizontal, one end of the second rotating shaft (63) is positioned above the middle position of the two horizontal plates (12), and the other end of the second rotating shaft (63) extends into the second cavity (62) and is connected with a second servo motor (64) arranged on one side of the second cavity (62) far away from the horizontal plates (12); the second vertical rod (65) is vertically arranged on one side, away from the second base (61), of the second rotating shaft (63) and extends towards the frame body (11); the second hook (66) is arranged on one side of the second vertical rod (65) far away from the second rotating shaft (63), and the inner side of the second hook (66) faces the pushing mechanism (3); the second servo motor (64) and the second rotating shaft (63) are vertically assembled on the second base (61) in a sliding mode; the second lifting assembly (67) is used for driving the second servo motor (64) and the second rotating shaft (63) to vertically reciprocate.

5. The testing machine for the lead frames as claimed in claim 4, wherein a sliding groove (71) is vertically formed in the inner wall of the second chamber (62) far away from the horizontal plate (12), and a sliding block (72) which is slidably assembled in the sliding groove (71) is arranged on one side of the second servo motor (64) back to the second rotating shaft (63); a second through groove (73) which is matched with the second rotating shaft (63) in a sliding manner is vertically formed in the inner wall, close to the horizontal plate (12), of the second cavity (62); the second lifting assembly (67) comprises: a second motor (671), a second cam (672), and a second mounting plate (673); the second mounting plate (673) is arranged on one side, facing the frame body (11), of the second servo motor (64); the second motor (671) is arranged on one side of the second chamber (62) far away from the horizontal plate (12), and an output shaft of the second motor (671) is parallel to the axis of the second rotating shaft (63); the second cam (672) is arranged on the output shaft of the second motor (671), and the second cam (672) is abutted against one side, facing the frame body (11), of the second mounting plate (673).

6. The testing machine for lead frames according to claim 1, characterized in that the pushing mechanism (3) comprises: a base plate (31), a pushing cylinder (32) and a push plate (33); the base plate (31) is arranged on the frame body (11) and faces to one side of the two horizontal plates (12) which are parallel and level; the pushing cylinder (32) is arranged on one side of the base plate (31) back to the frame body (11), and the piston end of the pushing cylinder (32) vertically faces to one side of the two horizontal plates (12) which are parallel and level and is connected with the pushing plate (33).

7. The testing machine for lead frames according to claim 1, characterized in that the drive mechanism (8) comprises; the device comprises a groove (81), a sliding plate (82), a mounting groove (83), a connecting rod (84), a first push rod (85), a second push rod (86), a lifting cylinder (87) and a driving cylinder (88); the groove (81) is arranged on the frame body (11) and is positioned between the two horizontal plates (12); the sliding plate (82) is in sliding contact with the inner wall, close to the ground, of the groove (81), and the sliding plate (82) slides back and forth along the conveying direction of the lead frame; the mounting groove (83) is arranged on one side of the sliding plate (82) far away from the ground; a lifting cylinder (87) with a piston end vertically upward is arranged on the bottom wall of the mounting groove (83); the connecting rod (84) is parallel to the horizontal plate (12) and is arranged on the piston end of the lifting cylinder (87); the first push rod (85) and the second push rod (86) are oppositely arranged on two sides of the connecting rod (84) back to the lifting cylinder (87), the first push rod (85) is positioned on one side, facing the pushing mechanism (3), of the first detection mechanism (4), and the second push rod (86) is positioned between the first detection mechanism (4) and the second detection mechanism (6); the driving cylinder (88) is arranged on the inner wall of the groove (81), and the piston end of the driving cylinder (88) is vertically connected to the vertical side of the sliding plate (82) facing to or back to the pushing mechanism (3).

8. The testing machine for lead frames according to claim 1, characterized in that the pressing mechanism (2) comprises a fixing bar (21) and a pressing wheel (23); at least two fixed rods (21) are uniformly arranged on one side of the horizontal plate (12) back to the frame body (11) at intervals and extend to the position between the two horizontal plates (12); the pressing wheel (23) is sleeved on the fixed rod (21) and is positioned above the middle position of the two horizontal plates (12).