Lead frame transfer apparatus and die apparatus

Abstract

A lead frame transfer device and a punching device belong to the technical field of semiconductor lead frame handling. The transfer device comprises a lifting plate, a pair of side plates are arranged at the bottom of the lifting plate, mounting holes are arranged in the side plates, first positioning rods are slidably arranged in the mounting holes, a transfer assembly is arranged at the two ends of the side plates, the transfer assembly comprises a top plate and a support rod penetrating through the corresponding side plate, a sliding rod penetrating through the side plate is connected to the outer end surface of the top plate, a receiving plate is arranged below the lifting plate and moves along the length direction of the side plate, a material falling hole is arranged in the receiving plate, second positioning rods are arranged on the two sides of the receiving plate, and guide parts are arranged at the two end portions of the receiving plate. The punching device comprises the transfer device, a conveying mechanism and a punching mechanism. The transfer device can effectively improve the transfer efficiency of the lead frame, and the punching device can effectively improve the punching efficiency of the lead frame.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of semiconductor lead frame conveying, and particularly relates to a lead frame transfer device and a punching device. BACKGROUND

[0002] There are two processes in the rib forming process of the plastic encapsulated lead frame, one is belt punching, and the other is single piece punching; the belt punching can realize continuous automatic feeding and punching speed block, and is the first choice for large-scale production. However, in the actual production process, the mainstream packaging piece is formed by belt punching, and for small batch, multi-variety and research and development samples, etc., the single piece punching process is still mainly used, because the expensive precision step punching rib forming die of the belt punching device and the long die debugging time when replacing different products require that the product must have a large enough batch to be economical.

[0003] The main disadvantage of the current single piece punching process is low efficiency, mainly reflected in the transfer process of the lead frame in the punching process. When punching the single piece lead frame, the lead frame needs to be placed on the lower die of the punching device first, and then the upper die is pressed down to cut off the metal connecting rib between the pins and the units and the edge band, and each packaging unit is completely separated and discharged. The waste frame formed by punching is still left on the lower die, which needs to be removed from the lower die before the next lead frame is placed. In the punching process, the degree of automation is low, and the transfer efficiency of the lead frame is low. The present application aims to improve the low production efficiency of the single piece punching process by improving the transfer efficiency of the lead frame. SUMMARY

[0004] In order to solve the above-mentioned problems of the prior art, the application provides a lead frame transfer device and a punching device, which can effectively improve the transfer efficiency of the lead frame and the punching process efficiency.

[0005] In order to achieve the above-mentioned purpose, the application adopts the following technology:

[0006] A lead frame transfer device, comprising:

[0007] A lifting plate vertically provided with a pair of parallel side plates at the bottom, the side plates are vertically provided with mounting holes, and a first positioning rod in a vertical state is slidably arranged in the mounting hole;

[0008] A transfer assembly is arranged at both ends of the side plate, which comprises a top plate parallel to the side plate and a support rod vertically penetrating the corresponding side plate; the outer end surface of the top plate is vertically connected with a slide rod penetrating the corresponding side plate; the upper end of the top plate is below the support rod, and the lower end is below the bottom surface of the side plate;

[0009] The material receiving plate is arranged in parallel below the lifting plate and moves along the length direction of the side plate; the material receiving plate is provided with a material falling hole, and a second positioning rod matched with the first positioning rod is vertically arranged on both sides of the material receiving plate;

[0010] The guide part is arranged at both ends of the material receiving plate and comprises a first section, a second section, a third section and a fourth section; the first section is inclined towards the middle part of the material receiving plate; the second section is vertically arranged and the upper end thereof is communicated with the lower end of the first section; the third section is horizontally arranged and one end thereof is connected to the lower end of the second section; the fourth section is communicated with the upper end of the first section and the other end of the third section, and the included angle between the fourth section and the second section is an acute angle;

[0011] When the lifting plate is lowered to the first height, the inner side end surface of the top plate and the support rod extends out of the inner side end surface of the corresponding side plate under the action of the first section, the inner side end surface of the first positioning rod extends out of the inner side end surface of the corresponding side plate and is aligned with the corresponding second positioning rod; when the lifting plate is lowered to the second height, the bottom surface of the first positioning rod abuts against the top surface of the second positioning rod, and the top plate and the support rod are retracted to the inner side end surface thereof under the action of the third section, so that the inner side end surface does not exceed the inner side end surface of the corresponding side plate.

[0012] A lead frame punching device, comprising:

[0013] The lead frame transfer device described above;

[0014] A conveying mechanism for conveying the lead frame horizontally and horizontally, and the lead frame transfer device is arranged at the end of the conveying mechanism, and the support rod is used for supporting the lead frame output from the end of the conveying mechanism;

[0015] A punching mechanism is arranged at the end of the lead frame transfer device, and is used for punching the lead frame sent by the material receiving plate, and sending the waste frame punched by the material receiving plate back to the lower side of the lifting plate.

[0016] The present application has the beneficial effects that:

[0017] 1. The transfer device can realize stable support and effective positioning of the lead frame in the feeding and transferring stages through the arrangement of the support rod, the mounting seat and the first positioning rod, which is beneficial to improve the stability of the lead frame in the transferring process;

[0018] 2. The slide rod and the support rod are arranged to be synchronously extended or retracted, and the cooperation between the top plate and the rectangular hole and the cooperation between the support rod and the side surface of the corresponding strip block can make the top plate push out the waste frame on the material receiving plate before the lead frame falls onto the material receiving plate, so that the transferring stage and the waste discharging stage are synchronously performed, and the overall transferring efficiency of the lead frame is effectively improved;

[0019] 3. By setting up the connecting rod, push rod, crossbar, first spring, and second spring, and coordinating the contact between the connecting rod and the column, and the movement of the connecting rod along the L-shaped groove, the downward stroke of the two blocks can be automatically converted into the synchronous relative approach or back-to-back separation of the support rod and the sliding rod, thereby realizing the transfer of the lead frame and the discharge of the waste frame, effectively improving the automation level of the transfer device, and helping to further improve the overall transfer efficiency of the lead frame. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the transfer device according to an embodiment of this application.

[0021] Figure 2 This is a schematic diagram of the structure of the top surface of the workbench in an embodiment of this application.

[0022] Figure 3 This is a schematic diagram of the receiving plate in an embodiment of this application.

[0023] Figure 4 yes Figure 3 A magnified view of part A in the middle.

[0024] Figure 5 This is a schematic diagram of the lifting plate structure in an embodiment of this application.

[0025] Figure 6 This is a side view of the side panel of an embodiment of this application.

[0026] Figure 7 This is a schematic diagram of the mounting base according to an embodiment of this application.

[0027] Figure 8 yes Figure 7 A magnified view of part B in the middle.

[0028] Figure 9 This is a diagram showing the positional relationship between the connecting rod and the guide plate when the lifting plate is at the first height according to an embodiment of this application.

[0029] Figure 10 This is a front view of the lifting plate when it is at the first height according to an embodiment of this application.

[0030] Figure 11 This is a diagram showing the positional relationship between the side plate and the receiving plate when the mating rod abuts against the upper part of one end of the horizontal section of the L-shaped groove in an embodiment of this application.

[0031] Figure 12 This is a front view of the lifting plate when the mating rod abuts against the upper part of one end of the horizontal section of the L-shaped groove in an embodiment of this application.

[0032] Figure 13 This is a diagram showing the positional relationship between the connecting rod and the guide plate when the lifting plate is at the second height according to an embodiment of this application.

[0033] Figure 14 is a structural schematic diagram of a lead frame.

[0034] Reference signs: 1-lifting plate, 11-side plate, 111-baffle, 112-motor, 12-mounting hole, 13-first positioning rod, 14-first accommodating groove, 15-mounting seat, 16-branch plate, 17-third spring, 18-strip-shaped groove, 19-connecting rod, 2-transfer assembly, 21-top plate, 22-supporting rod, 23-sliding rod, 24-matching rod, 25-first spring, 26-push rod, 27-cross rod, 28-second spring, 3-material receiving plate, 31-material falling hole, 32-second positioning rod, 33-second accommodating groove, 4-guide part, 41-first section, 42-second section, 43-third section, 44-fourth section, 45-guiding plate, 5-bidirectional screw rod, 6-conveying mechanism, 61-conveying belt, 7-lead frame, 71-positioning groove, 8-punching mechanism, 81-lower die seat, 82-discharge hole, 83-upper die, 9-workbench, 91-door-shaped frame, 92-first linear mechanism, 93-first guide rod, 94-second guide rod, 95-second linear mechanism, 96-third linear mechanism. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application are described in detail below with reference to the drawings, but the embodiments described in the present application are part of the embodiments of the present application, not all the embodiments.

[0036] Embodiment 1

[0037] The embodiments of the present application provide a lead frame transfer device for sending the lead frame 7 into a punching process for punching and completing the waste frame edge waste, the structure of the lead frame 7 is shown in Figure 14 The plastic package body is arranged in an array along the length direction of the lead frame 7 and forms multiple rows, the package body wraps the chip, the bonding wire, the inner lead of the lead frame, the connecting rib connects the metal thin rib of each plastic package unit and the fixed lead, and two arc-shaped positioning grooves 71 are arranged on the two side surfaces of the lead frame 7.

[0038] The lead frame transfer device comprises a lifting plate 1, a transfer assembly 2, a material receiving plate 3, a guide part 4 and the like.

[0039] Among them, as Figures 3-6As shown, the lifting plate 1 is horizontally arranged and moves in the vertical direction, and a pair of vertical side plates 11 are arranged on the bottom of the lifting plate 1, the distance between the two side plates 11 is equal to the width of the lead frame 7, and two mounting holes 12 are vertically arranged on the two side plates 11, and the two mounting holes 12 on the two side plates 11 are oppositely arranged, and a mounting seat 15 is slidably arranged in the mounting hole 12, the mounting seat 15 is arranged in a strip shape and vertically arranged, and a first positioning rod 13 in a vertical state is slidably arranged on the inner side surface of the mounting seat 15, and the inner side end surface of the first positioning rod 13 is arranged in an arc surface.

[0040] As shown in Figure 3 and Figure 4 , the transfer assembly 2 is arranged at the two ends of the side plate 11, which includes a top plate 21 arranged parallel to the side plate 11 and a support rod 22 vertically penetrating the corresponding side plate 11; the outer side end surface of the top plate 21 is vertically connected with a slide rod 23 penetrating the corresponding side plate 11; the two support rods 22 on one side plate 11 are located between the corresponding two slide rods 23, and the axis of each support rod 22 is located on the same horizontal arrangement; the upper end of the top plate 21 is located below the support rod 22, and the lower end is located below the bottom surface of the side plate 11.

[0041] As shown in Figure 3 , the receiving plate 3 is arranged parallel to the lifting plate 1 below and moves along the length direction of the side plate 11; the receiving plate 3 is provided with a rectangularly arranged material falling hole 31, and the material falling hole 31 is arranged along the length direction of the side plate 11; the receiving plate 3 on both sides of the material falling hole 31 is vertically provided with two second positioning rods 32 arranged along the length direction of the side plate 11, and the inner side end surface of the second positioning rod 32 is arranged in an arc surface, and the first positioning rod 13 is used to cooperate with the corresponding second positioning rod 32.

[0042] As shown in Figure 3 , the guide part 4 is arranged at the two side ends of the receiving plate 3, which is used to guide the slide rod 23 and the support rod 22 to move along the axis thereof with the lifting of the lifting plate 1; the guide part 4 includes a first section 41, a second section 42, a third section 43 and a fourth section 44; wherein the first section 41 is inclined towards the middle part of the receiving plate 3; the second section 42 is vertically arranged, and the upper end thereof is communicated with the lower end of the first section 41; the third section 43 is horizontally arranged, and one end thereof is connected to the lower end of the second section 42; the two ends of the fourth section 44 are respectively communicated with the upper end of the first section 41 and the other end of the third section 43, and the included angle between the fourth section 44 and the second section 42 is an acute angle.

[0043] As shown in Figure 1 and Figure 2 , the lifting plate 1 is arranged on a horizontally arranged and strip-shaped workbench 9, the length direction of the side plate 11 is consistent with the length direction of the workbench 9, and the receiving plate 3 is slidably arranged on the surface of the workbench 9 along the length direction of the side plate 11.

[0044] The following will be according to the above structure on the lead frame 7 specific transfer principle are described:

[0045] The loading stage: as shown in Figure 3 and Figure 4 , the receiving plate 3 moves to the lifting plate 1 directly below, at this time the top plate 21 and the inner side end face of the support rod 22 does not exceed the corresponding side plate 11 inner side end face. As shown in Figure 4 , Figure 9 , Figure 10 , the lifting plate 1 is vertically lowered to the first height, the top plate 21 and the inner side end face of the support rod 22 under the guidance of the first segment 41 extends out of the corresponding side plate 11 inner side end face, at this time, the lead frame 7 can be transported to the two side plates 11 by automatic conveying mechanism, and the two sides of the lead frame 7 are supported by the support rod 22, the top plate 21 along the vertical direction downward projection is located in the blanking hole 31; at the same time, due to the constant conveying speed, the lead frame 7 transported will stop at the predetermined position between the two side plates 11, and the positioning groove 71 on both sides of the lead frame 7 will not deviate from the corresponding first positioning rod 13 by a large distance in the length direction of the side plate 11, the mounting seat 15 on the two side plates 11 along the direction perpendicular to the side plate 11 synchronous relative approach, drive the inner side end face of the first positioning rod 13 to extend out of the corresponding side plate 11 a predetermined distance, the inner side end face of the first positioning rod 13 and the edge of the corresponding positioning groove 71 abuts and enters into the positioning groove 71 along the edge of the positioning groove 71, so as to realize the adjustment and positioning of the lead frame 7; the first positioning rod 13 after extending out along the vertical direction downward projection respectively coincides with the top surface of the corresponding second positioning rod 32, thus the loading stage is completed. It should be noted that the inner side end face of the first positioning rod 13 only abuts with the concave arc surface in the positioning groove 71, and no clamping force is generated.

[0046] The transfer stage: as shown in Figures 11-13As shown, the lifting plate 1 continues to descend, the support rods 22 and the slide rods 23 remain in the extended state under the guidance of the second section 42, and the lead frame 7 descends synchronously with the lifting plate 1 under the support of the support rods 22; when the bottom surface of the first positioning rod 13 abuts against the top surface of the corresponding second positioning rod 32, and the curved surface of the first positioning rod 13 abuts against the curved surface of the second positioning rod 32, the lifting plate 1 continues to descend to the second height, the first positioning rod 13 slides upward along the vertical direction on the mounting seat 15 relative to the lifting plate 1, the first positioning rod 13 and the second positioning rod 32 always abut against each other, the lower end of the side plate 11 abuts against the top surface of the receiving plate 3, and the support rods 22 and the slide rods 23 retract to the inner side end surfaces thereof which do not exceed the inner side end surfaces of the corresponding side plates 11 under the guidance of the third section 43; at this time, the lead frame 7 will fall on the receiving plate 3 along the first positioning rod 13 and the second positioning rod 32 due to the absence of the support of the support rods 22, the inner side end surface of the second positioning rod 32 is located in the corresponding positioning groove 71, and thus the transfer of the lead frame 7 is completed; then the lifting plate 1 ascends and returns to the cooperation position with the first section 41 under the guidance of the fourth section 44; the receiving plate 3 carrying the lead frame 7 moves to the punching device for punching, and the remaining waste frame returns to the position directly below the lifting plate 1 with the receiving plate 3 to discharge waste and wait for the transfer of the next lead frame 7.

[0047] Discharge stage: the entire discharge stage is performed synchronously with the transfer stage, as shown in FIG. 6. Figures 9-13 As shown, the waste frame formed by the punching of the last lead frame 7 returns to the position directly below the lifting plate 1 with the receiving plate 3, the lifting plate 1 descends to the first height, and the next lead frame 7 is conveyed into the space between the side plates 11; since the lower end of the top plate 21 is located below the bottom surface of the side plate 11, the lower end of the top plate 21 will abut against the edge of the waste frame from the top surface of the receiving plate 3 into the dropping hole 31 during the descent of the lifting plate 1 from the first height to the second height, so as to bend the two sides of the waste frame and make the waste frame separate from the second positioning rod 32 until the lower end of the top plate 21 pushes the waste frame out; after the lifting plate 1 descends to the second height, the top plate 21 and the support rods 22 retract to the inner side end surfaces thereof which do not exceed the inner side end surfaces of the corresponding side plates 11, and the next lead frame 7 replaces the position of the waste frame on the receiving plate 3, so as to complete the discharge synchronously in the transfer stage.

[0048] The transfer device can realize stable support and effective positioning of the lead frame 7 in the feeding and transferring stages through the arrangement of the supporting rod 22, the mounting seat 15 and the first positioning rod 13, and is favorable for improving the stability of the lead frame 7 in the transferring process. Meanwhile, the transfer device is arranged through the slide rod 23, the supporting rod 22 and the guide part 4, and the cooperation between the top plate 21 and the blanking hole 31 and between the supporting rod 22 and the corresponding side plate 11, so that the waste frame on the receiving plate 3 can be knocked out before the lead frame 7 falls to the receiving plate 3, thereby realizing the synchronous performance of the transferring stage and the waste removal stage, and effectively improving the overall transfer efficiency of the lead frame 7.

[0049] In addition, through the cooperation between the first positioning rod 13 and the second positioning rod 32, the lead frame 7 can fall along the curved surface connected by the first positioning rod 13 and the second positioning rod 32, so as to ensure that the lead frame 7 can be accurately docked with the second positioning rod 32 after falling, and the reliability of the transfer device can be effectively improved.

[0050] When the receiving plate 3 carrying the lead frame 7 moves to the punching device, the lifting plate 1 is also lifted up to prepare for the feeding of the lead frame 7. When the receiving plate 3 carrying the residual waste frame after punching moves back to the position directly below the lifting plate 1, the feeding of the next lead frame 7 is also completed synchronously. That is, when the receiving plate 3 carrying the waste frame moves back to the position directly below the lifting plate 1, the waste removal and the transfer can be directly and synchronously performed, and the transfer efficiency of the lead frame 7 is further improved.

[0051] Specifically, as shown in Figure 3 and Figure 4 , the second accommodating grooves 33 are arranged at both ends of the blanking hole 31. When the lifting plate 1 is lowered to the second height, the four top plates 21 can enter the corresponding second accommodating grooves 33 respectively, so that the inner end face of the top plate 21 does not exceed the inner end face of the corresponding side plate 11. Through the arrangement of the second accommodating grooves 33, when the lifting plate 1 is lifted from the second height, the top plate 21 will not knock the lead frame 7 falling on the receiving plate 3, thereby avoiding the problem of transfer failure, and further improving the reliability of the transfer device.

[0052] Preferably, as shown in Figure 1 and Figure 5 , one end of the side plate 11 is provided with a baffle 111 arranged perpendicularly to the side plate 11. During feeding, the automatic conveying mechanism conveys the lead frame 7 to the position where the end of the lead frame 7 abuts against the baffle 111. After the lead frame 7 abuts against the baffle 111, the positioning grooves 71 on both sides of the lead frame 7 are roughly aligned with the corresponding first positioning rods 13, so as to facilitate the positioning of the lead frame 7 by the first positioning rods 13.

[0053] Preferably, as shown in Figure 1 and Figure 2As shown, the workbench 9 is provided with a door-shaped frame 91 along the length direction thereof, the lifting plate 1 is located in the door-shaped frame 91, the top of the door-shaped frame 91 is provided with a first linear mechanism 92, the movable end of the first linear mechanism 92 vertically penetrates the top of the door-shaped frame 91 and is connected to the top surface of the lifting plate 1, the first linear mechanism 92 can adopt a linear cylinder, a hydraulic cylinder or the like; the top surface of the lifting plate 1 is connected with a first guide rod 93 vertically penetrating the top of the door-shaped frame 91; the workbench 9 is provided with a pair of second guide rods 94 arranged along the length direction thereof, the two sides of the receiving plate 3 are respectively slidably provided on the second guide rods 94; the workbench 9 is provided with a second linear mechanism 95, the movable end of the second linear mechanism 95 is directed to the length direction of the workbench 9 and is connected to the receiving plate 3, the second linear mechanism 95 can adopt a linear cylinder, a hydraulic cylinder or the like.

[0054] Preferably, as shown in Figure 2 The second guide rod 94 can be provided with a positioning structure, so that the receiving plate 3 can be accurately located below the lifting plate 1.

[0055] Embodiment 2

[0056] As a further embodiment of the above-mentioned embodiment 1, as shown in Figures 3-9 In order to guide the support rod 22 and the slide rod 23 during the movement of the lifting plate 1, a cooperation rod 24 is arranged on the end of the slide rod 23 outside the side plate 11, the cooperation rod 24 is a round rod; the guide part 4 includes guide plates 45 vertically arranged on the two side ends of the receiving plate 3, the side surface of the guide plate 45 is directed to the length direction of the side plate 11, and the top surface of the guide plate 45 is inclined to the middle part of the receiving plate 3; the opposite side surfaces of the two guide plates 45 on the same side of the receiving plate 3 are provided with L-shaped grooves, one end of the horizontal part of the L-shaped groove is communicated with one end of the guide plate 45 directed to the middle part of the receiving plate 3, one end of the vertical part of the L-shaped groove is communicated with the top surface of the guide plate 45, and the included angle between the vertical part of the L-shaped groove and the one end of the guide plate 45 directed to the middle part of the receiving plate 3 is an acute angle; wherein the top surface of the guide plate 45, the one end of the guide plate 45 directed to the middle part of the receiving plate 3, the horizontal part and the vertical part of the L-shaped groove are sequentially used to form the first section 41, the second section 42, the third section 43 and the fourth section 44, and the cooperation rod 24 is used to abut the first section 41 and the second section 42 and is inserted into the third section 43 and the fourth section 44.

[0057] As shown in Figure 3 and Figure 4As shown, the two ends of the side plate 11 are provided with a first accommodating groove 14, which is used to accommodate the top plate 21 when the inner side end face of the top plate 21 does not exceed the inner side end face of the corresponding side plate 11; a first spring 25 is sleeved on the slide rod 23 and connected between the top plate 21 and the bottom face of the corresponding first accommodating groove 14; the end of the slide rod 23 located on the outer side of the side plate 11 is vertically connected with a push rod 26; the end of the support rod 22 located on the outer side of the side plate 11 is connected through a cross rod 27 arranged in the length direction of the side plate 11, and the cross rod 27 is located between the corresponding side plate 11 and the push rod 26; a second spring 28 is sleeved on the support rod 22 and connected between the outer side of the side plate 11 and the cross rod 27; when the first spring 25 and the second spring 28 are in the natural state, the inner side end face of the top plate 21 and the inner side end face of the support rod 22 do not exceed the inner side end face of the corresponding side plate 11, the cross rod 27 and the push rod 26 abut, the horizontal distance between the cooperation rod 24 and the one end of the corresponding guide plate 45 towards the middle part of the material receiving plate 3 is equal to the length of the third section 43, and the vertical downward projection of the cooperation rod 24 is located on the top face of the corresponding guide plate 45.

[0058] In use, as shown in Figure 3 , Figure 4 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 As shown, the material receiving plate 3 is located directly below the lifting plate 1, the length of the one end of the cooperation rod 24 extending into the opposite side face of the corresponding guide plate 45 is less than the depth of the L-shaped groove, and the first spring 25 and the second spring 28 are in the natural state, and the inner side end face of the top plate 21 and the inner side end face of the support rod 22 do not exceed the inner side end face of the corresponding side plate 11.

[0059] The lifting plate 1 moves downward, the cooperation rod 24 abuts against the top inclined face of the corresponding guide plate 45 and the inclined face of the corresponding guide plate 45 moves downward, so that the slide rods 23 on the two side plates 11 are synchronously relatively close to each other, and then the inner side end face of the top plate 21 exceeds the inner side end face of the corresponding side plate 11, and the vertical downward projection of the top plate 21 is located in the material falling hole 31; at the same time, the push rod 26 pushes the corresponding cross rod 27 against the elasticity of the second spring 28, so that the support rods 22 on the two side plates 11 are synchronously relatively close to each other, and the inner side end face of the support rod 22 exceeds the inner side end face of the corresponding side plate 11; as shown in Figure 9 and Figure 10 When the cooperation rod 24 leaves the top inclined face of the guide plate 45 and abuts against the top of the one end of the guide plate 45 towards the middle part of the material receiving plate 3, that is, the lifting plate 1 is lowered to the first height, the support rod 22 supports the lead frame 7 conveyed.

[0060] As shown in Figures 11-13As shown, when the connecting rod 24 abuts against the end of the guide plate 45 facing the middle of the receiving plate 3 and continues to move down with the lifting plate 1, since the end of the guide plate 45 facing the middle of the receiving plate 3 is a vertical surface, the top plate 21 and the support rod 22 always remain in an extended state.

[0061] like Figures 11-13 As shown, when the mating rod 24 abuts against the upper part of one end of the L-shaped groove, the top plate 21 pushes out the waste frame, and the bottom of the first positioning rod 13 abuts against the top of the second positioning rod 32; when the mating rod 24 continues to move down to one end of the L-shaped groove, that is, when the lifting plate 1 descends to the second height, the mating rod 24 will enter the L-shaped groove under the action of the first spring 25 and abut against the end of the L-shaped groove, that is, the connection with the vertical part of the L-shaped groove. At this time, the first spring 25 returns to its natural state, the top plate 21 retracts into the corresponding second receiving groove 33, and the inner end face of the top plate 21 does not exceed the inner end face of the corresponding side plate 11. The second spring 28 also returns to its natural state with the movement of the push rod 26, and the support rod 22 retracts. The lead frame 7 is lowered so that its inner end face does not exceed the inner end face of the corresponding side plate 11. After the lead frame 7 is lowered, the lifting plate 1 moves upward, driving the mating rod 24 to move along the vertical part of the L-shaped groove. The first spring 25 contracts, the sliding rods 23 on the two side plates 11 separate in opposite directions, and the top plate 21 further retracts into the corresponding second receiving groove 33, so that the top plate 21 further separates from the two sides of the lead frame 7 during the process of rising with the lifting plate 1, further ensuring that the top plate 21 will not lift the lead frame 7. After the mating rod 24 moves out along the vertical part of the L-shaped groove, the first spring 25 extends to the natural state, and the vertical downward projection of the mating rod 24 falls back onto the top inclined surface of the corresponding guide plate 45, ready for the next loading and transfer.

[0062] By configuring the connecting rod 24, push rod 26, crossbar 27, first spring 25, and second spring 28, and by coordinating the contact between the connecting rod 24 and the guide plate 45, and the movement of the connecting rod 24 along the L-shaped groove, the downward stroke of the lifting plate 1 can be automatically converted into the synchronous relative approach or back-to-back separation of the support rod 22 and the sliding rod 23, thereby realizing the transfer of the lead frame 7 and the discharge of the waste frame, effectively improving the automation level of the transfer device and further improving the overall material transfer efficiency of the lead frame 7; at the same time, the support rods 22 on the two side plates 11 can retract synchronously, that is, when the lead frame 7 is released, the supporting force on both sides disappears at the same time, and the force is consistent. Moreover, the lengths of the first positioning rod 13 and the second positioning rod 32 are relatively short, which can effectively ensure the stable descent of the lead frame 7 and further improve the reliability of the material transfer device.

[0063] Specifically, such as Figure 5 , Figure 7 , Figure 8As shown, the top end of the mounting base 15 is provided with a support plate 16 protruding towards the corresponding first positioning rod 13, and the bottom surface of the support plate 16 is connected with the top surface of the corresponding first positioning rod 13 through a vertically arranged third spring 17. The inner side of each side plate 11 is provided with a strip-shaped slot 18 which is connected with the corresponding mounting hole 12, and the strip-shaped slot 18 is provided with a connecting rod 19 which is arranged towards the length direction of the side plate 11 and is connected with the corresponding mounting base 15. A bidirectional screw rod 5 is arranged between the two side plates 11 and is perpendicular to the side plates 11. The two ends of the bidirectional screw rod 5 are rotatably connected with the inner sides of the two side plates 11, and the middle portions of the two connecting rods 19 are threadedly connected with the two sections of the bidirectional screw rod 5 which are opposite in thread. The outer side of one of the side plates 11 is provided with a motor 112 for driving the bidirectional screw rod 5 to rotate. When the second positioning rod 32 is moved to abut against the first positioning rod 13, the top surface of the second positioning rod 32 can be closely attached to the bottom surface of the first positioning rod 13 due to the action of the third spring 17, so as to ensure that the second positioning rod 32 is stably connected with the inclined surface of the first positioning rod 13 and further ensure the stability of the falling of the lead frame 7.

[0064] Embodiment 3

[0065] The present application also provides a lead frame punching device, as shown in Figure 1 and Figure 2 which comprises the lead frame transfer device of Embodiment 1 or 2, a conveying mechanism 6 and a punching mechanism 8.

[0066] As shown in Figure 1 and Figure 2 the conveying mechanism 6 comprises a conveying belt 61 which is arranged in the same direction and horizontally on the workbench 9 and is used for horizontally conveying the lead frame 7, and the lead frame transfer device is located at the end of the conveying direction of the conveying belt 61. When the lifting plate 1 is lowered to the first height, the conveying belt 61 sends one lead frame 7 between the two side plates 11 and the lead frame 7 is supported by the supporting rod 22.

[0067] Preferably, in order to ensure that the conveying belt 61 can accurately convey, corresponding guide structures can be arranged on the conveying belt 61 to guide the movement of the lead frame 7.

[0068] As shown in Figure 1 and Figure 2As shown, the punching mechanism 8 is arranged at the end of the lead frame transfer device, including a lower die seat 81 arranged on the workbench 9, which is arranged in a rectangular shape and along the length direction of the workbench 9, and the lower die seat 81 is provided with a discharging hole 82, and an upper die 83 is arranged above the lower die seat 81 and moves in the vertical direction; the blanking hole 31 is connected to one end of the receiving plate 3 facing the lower die seat 81; the receiving plate 3 can move to the punching mechanism 8, so that the lower die seat 81 enters the blanking hole 31 from one end of the receiving plate 3, so that the lead frame 7 moves horizontally to the lower die seat 81; then the upper die 83 moves downward to punch the lead frame 7, and the semiconductor package punched off falls out of the discharging hole 82, and the residual waste frame is sent to the lower side of the lifting plate 1 by the receiving plate 3.

[0069] Specifically, as shown, the door-shaped frame 91 is further provided with a third linear mechanism 96 for driving the upper die 83 to move in the vertical direction, and the third linear mechanism 96 can be in the form of a linear cylinder, a hydraulic cylinder, etc.

[0070] The lead frame transfer device has high lead frame 7 transfer efficiency, which can effectively improve the punching efficiency of the lead frame punching device.

[0071] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Obviously, those skilled in the art can make various modifications and changes to the present application without departing from the spirit and scope of the present application.

Claims

1. A lead frame transfer device, characterized in that, include: The lifting plate (1) has a pair of parallel side plates (11) vertically arranged at the bottom. The side plates (11) have vertically opened mounting holes (12), and a first positioning rod (13) in a vertical state is slidably arranged in the mounting holes (12). The transfer assembly (2) is respectively located at both ends of the side plate (11), and includes a top plate (21) parallel to the side plate (11) and a support rod (22) that passes vertically through the corresponding side plate (11); the outer end face of the top plate (21) is vertically connected to a sliding rod (23) that passes through the corresponding side plate (11); the upper end of the top plate (21) is located below the support rod (22), and its lower end is located below the bottom surface of the side plate (11); The receiving plate (3) is arranged parallel to the lower part of the lifting plate (1) and moves along the length of the side plate (11); the receiving plate (3) has a dropping hole (31), and the receiving plates (3) on both sides are provided with a second positioning rod (32) that matches the first positioning rod (13). The guide section (4) is located at both ends of the receiving plate (3), including a first section (41), a second section (42), a third section (43), and a fourth section (44); wherein the first section (41) is inclined toward the middle of the receiving plate (3); the second section (42) is vertically arranged, and its upper end is connected to the lower end of the first section (41); the third section (43) is horizontally arranged, and one end of its end is connected to the lower end of the second section (42); the two ends of the fourth section (44) are respectively connected to the upper end of the first section (41) and the other end of the third section (43), and the angle formed by the fourth section (44) and the second section (42) is an acute angle; When the lifting plate (1) descends to the first height, the inner end faces of the top plate (21) and the support rod (22) extend out of the inner end face of the corresponding side plate (11) under the action of the first section (41), and the inner end face of the first positioning rod (13) extends out of the inner end face of the corresponding side plate (11) and aligns with the corresponding second positioning rod (32); when the lifting plate (1) descends to the second height, the bottom surface of the first positioning rod (13) abuts against the top surface of the second positioning rod (32), and the top plate (21) and the support rod (22) retract under the action of the third section (43) until their inner end faces do not exceed the inner end face of the corresponding side plate (11).

2. The lead frame transfer device according to claim 1, characterized in that, The sliding rods (23) located on the outer side of the side plate (11) are provided with mating rods (24) arranged along the length of the side plate (11) and facing away from each other; the guide part (4) includes guide plates (45) respectively perpendicularly provided at the ends of the receiving plate (3), with their sides facing the length of the side plate (11) and their top surfaces inclined towards the middle of the receiving plate (3); the two guide plates (45) located on the same side of the receiving plate (3) are provided with L-shaped grooves on their opposite sides, with one end of their horizontal parts connected to the guide plates. (45) One end of the L-shaped groove facing the middle of the receiving plate (3) is connected to the top surface of the guide plate (45); wherein, the top surface of the guide plate (45), the end of the guide plate (45) facing the middle of the receiving plate (3), the horizontal part and the vertical part of the L-shaped groove are respectively used to form the first section (41), the second section (42), the third section (43) and the fourth section (44), and the mating rod (24) is used to fit into the top surface of the corresponding guide plate (45), the end facing the middle of the receiving plate (3) and the L-shaped groove.

3. The lead frame transfer device according to claim 2, characterized in that, Both ends of the side plate (11) are provided with a first receiving groove (14) for receiving the top plate (21) when the inner end face of the top plate (21) does not exceed the inner end face of the corresponding side plate (11).

4. A lead frame transfer device according to claim 3, characterized in that, A first spring (25) is fitted on the slide rod (23), which is connected between the top plate (21) and the bottom surface of the corresponding first receiving groove (14); the ends of the slide rods (23) located on the outside of the side plate (11) are all vertically connected to push rods (26); the ends of the support rods (22) located on the outside of the side plate (11) are connected by a crossbar (27) arranged in the length direction of the side plate (11), and the crossbar (27) is located between the corresponding side plate (11) and the push rod (26); the support rods (22) A second spring (28) is fitted on the top plate (21) and connected between the side plate (11) and the crossbar (27). When the first spring (25) and the second spring (28) are in their natural state, the inner end faces of the top plate (21) and the support rod (22) are located in the corresponding side plate (11), the crossbar (27) and the push rod (26) abut against each other, and the horizontal distance between the mating rod (24) and the end of the corresponding guide plate (45) facing the middle of the receiving plate (3) is equal to the length of the third segment (43).

5. A lead frame transfer device according to claim 1, characterized in that, The material discharge hole (31) is rectangular and arranged along the length of the side plate (11). A second receiving groove (33) is provided at both ends of the material discharge hole (31).

6. The lead frame transfer device according to claim 1, characterized in that, Mounting seats (15) are slidably provided in the mounting holes (12). The first positioning rod (13) is slidably fitted on the inner side of the corresponding mounting seat (15) in the vertical direction. The top of the mounting seat (15) is provided with a support plate (16) protruding towards the corresponding first positioning rod (13). The bottom surface of the support plate (16) and the top surface of the corresponding first positioning rod (13) are connected by a vertically arranged third spring (17).

7. A lead frame transfer device according to claim 6, characterized in that, The inner sides of the two side plates (11) are provided with strip grooves (18) that connect to the corresponding mounting holes (12), and there are connecting rods (19) in the grooves that are oriented toward the length of the side plate (11) and connected to the corresponding mounting base (15); a two-way screw rod (5) is provided between the two side plates (11), which is set perpendicular to the side plate (11), and the two connecting rods (19) are respectively threaded into the two opposite ends of the two-way screw rod (5), and the two-way screw rod (5) is set to rotate around its own axis.

8. A lead frame punching device, characterized in that, include: A lead frame transfer device as described in any one of claims 1 to 7; A conveying mechanism (6) is used to convey the lead frame (7) laterally and horizontally. The lead frame transfer device is located at the end of the conveying mechanism (6), and a support rod (22) is used to support the lead frame (7) output from the end of the conveying mechanism (6). The punching mechanism (8) is spaced at the end of the lead frame transfer device and is used to punch the lead frame (7) sent by the receiving plate (3), and the receiving plate (3) sends the punched waste frame back to the bottom of the lifting plate (1).

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