Lead frame automatic marking apparatus and method of operation

Abstract

The present application relates to the technical field of lead frame production, in particular to a kind of lead frame automatic marking equipment and operating method.The present application is by being provided with feeding station, transport marking station and discharging station, can realize the automatic conveying of raw material box in the lead frame to be handled and separator paper, the automatic marking of lead frame, the automatic feeding of empty material box, and realize the automatic discharge of the lead frame handled after automatic marking and separator paper are placed into empty material box again Process, little artificial interference in marking process, greatly reduce the labor intensity of artificial, improve work efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lead frame production, in particular to a lead frame automatic marking equipment and operation method. BACKGROUND

[0002] At present, most of the semiconductor industry factories adopt manual operation marking machine to mark the frame, which needs personnel to operate the equipment and information inputting, such as checking batch number, inputting mark number, taking frame, taking paper, marking batch number, placing frame, placing paper, taking empty box, taking raw material box and a series of steps, the labor intensity of people is very large, and each step is manually involved, so the error opportunity is also large. Later, people mark a two-dimensional code on the lead frame in advance, and check the batch information on the two-dimensional code, but so far, the feeding, conveying and discharging processes involved in the two-dimensional code marking and marking operation are mostly completed by manual operation, which is not only low in efficiency, but also greatly affected by human factors. SUMMARY

[0003] The present application aims at the problem of low work efficiency caused by manual two-dimensional code marking in the prior art, and provides a lead frame automatic marking equipment and operation method.

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0005] A lead frame automatic marking equipment, comprising a feeding station, a conveying and marking station and a discharging station, the feeding station, the conveying and marking station and the discharging station are sequentially arranged, the feeding station is provided with a feeding position and a material taking and conveying device, the feeding position is used for placing lead frames and paper sheets, and the material taking and conveying device can transfer the lead frames or paper sheets at the feeding position to a specified position of the conveying and marking station;

[0006] The conveying and marking station is provided with a frame conveying guide rail, a paper sheet conveying guide rail, a waiting area, a marking area and a discharging area, the waiting area, the marking area and the discharging area are sequentially arranged, the frame conveying guide rail and the paper sheet conveying guide rail are arranged side by side and extend from the waiting area to the discharging area, the frame conveying guide rail and the paper sheet conveying guide rail are respectively provided with a feeding trolley, the feeding trolley can make linear reciprocating motion on the frame conveying guide rail or the paper sheet conveying guide rail, a marking machine is arranged at the position of the marking area, and the marking machine corresponds to the position of the frame conveying guide rail;

[0007] The blanking station is provided with a blanking conveying device and an upper and lower blanking box platform, the upper and lower blanking box platform comprises an upper empty blanking box area, a blanking box discharging area and a blanking box conveying area, the upper empty blanking box area and the blanking box discharging area are arranged side by side, and the blanking box conveying area is arranged at the same end of the upper empty blanking box area and the blanking box discharging area, the upper empty blanking box area and the blanking box discharging area are used for placing blanking boxes, the blanking boxes can move from the upper empty blanking box area to the side where the blanking box conveying area is located under the action of a first blanking box pushing mechanism, and the blanking boxes can be pushed from the side where the blanking box conveying area is located to the blanking box discharging area under the action of a second blanking box pushing mechanism, the blanking box conveying area is provided with a blanking box conveying mechanism and a loading trolley, the blanking box conveying mechanism can drive the loading trolley to reciprocate between the upper empty blanking box area and the blanking box discharging area, and the blanking conveying device is used for alternately transferring lead frame and separator paper in the discharging area to a designated receiving position of the blanking box conveying area.

[0008] Preferably, the upper feeding position is provided with 3*4 waiting positions, 1 waste paper skin position, 1 spare paper sheet position and 1 manual feeding position, and the waste paper skin position, the spare paper sheet position and the manual feeding position are sequentially arranged in a row at the most front side of the waiting positions. The lead frame and the separator paper stored in the raw material box are alternately stacked and placed. During feeding, a batch of raw materials is manually taken from the raw material box and placed in the manual feeding position, and then automatically distributed to the designated waiting position by the material taking conveying device, thereby improving the automation degree of feeding and distribution, reducing human errors, avoiding the confusion risk of different batches of raw materials, and facilitating the automatic distribution of raw materials. The waiting position is used for storing raw materials, the waste paper skin position is used for storing excess separator paper detected in the waiting position, and the spare paper sheet position is used for storing separator paper. When there is no separator paper between the frames in the raw material in the waiting position, the excess separator paper can be directly taken from the spare paper sheet position and transported to the designated position in the waiting area. When there is excess separator paper between the adjacent two layers of lead frames in the raw material in the waiting position, the excess separator paper can be directly sucked from the waiting position and placed in the waste paper skin position, thereby preventing misoperation. The above layout of the feeding position facilitates the guarantee of the quality and orderly processing of the lead frame production.

[0009] Preferably, the periphery of each feeding position is provided with a plurality of limiting columns for blocking the displacement of raw materials in each position, and the top end of the limiting column is in the shape of a bullet head. The limiting column near the position is designed to have a special taper structure, which can effectively prevent the material sheet from being scraped off during taking.

[0010] Preferably, the material taking and transporting device comprises an adsorption mechanism, a clamping mechanism, a first lifting mechanism, a second lifting mechanism, a transverse moving mechanism and a longitudinal moving mechanism, wherein the adsorption mechanism is used for adsorbing the lead frame or the separator paper, the clamping mechanism is used for clamping the raw material at the artificial feeding position in a stack, one end of the first lifting mechanism is connected with the adsorption mechanism and the other end is connected with the transverse moving mechanism, one end of the second lifting mechanism is connected with the clamping mechanism and the other end is connected with the transverse moving mechanism, the first lifting mechanism can drive the adsorption mechanism to reciprocate vertically, the second lifting mechanism can drive the clamping mechanism to reciprocate vertically, the transverse moving mechanism can drive the first lifting mechanism and the second lifting mechanism to reciprocate linearly in the transverse direction, and the longitudinal moving mechanism can drive the transverse moving mechanism to reciprocate linearly in the longitudinal direction.

[0011] Preferably, the bottom of the feeding station is provided with a raw material storage space, and the raw material storage space is connected with a protective gas inflation interface, and inert protective gas can be filled into the raw material storage space through the protective gas inflation interface to protect the frame.

[0012] Preferably, the L-shaped boss and a plurality of vacuum adsorption holes are arranged on the bearing table of the feeding trolley for placing materials, wherein the vacuum adsorption holes are used for adsorbing the lead frame and the separator paper on the bearing table of the feeding trolley through negative pressure, which on the one hand facilitates the unloading of the material taking and transporting device, and on the other hand can prevent the lead frame or the separator paper from being slightly bent and deformed, thus facilitating stable two-dimensional code setting and ensuring marking quality, the inner side of the L-shaped boss is used for limiting the adjacent two side edges of the lead frame or the paper sheet, the opposite sides of the L-shaped boss are respectively provided with a first stop block and a second stop block for pushing the frame or the paper sheet close to the boss, the first stop block and the second stop block are used for contacting the other two side edges of the lead frame or the paper sheet, the first stop block is connected with a first pushing assembly, the second stop block is connected with a second pushing assembly, the first pushing assembly can drive the first stop block to push the lead frame or the separator paper on the bearing table in the longitudinal direction of the line, and the second pushing assembly can drive the second stop block to push the lead frame or the separator paper on the bearing table in the transverse direction of the line, through the pushing of the first stop block and the second stop block on the diagonal side edges of the lead frame or the separator paper, the lead frame or the separator paper is limited close to the L-shaped boss, which facilitates ensuring that the lead frame or the separator paper can always remain in a fixed position during transportation, thereby ensuring the marking quality.

[0013] Preferably, the feeding and discharging box platform is located below the unloading area, and the box transporting area is located behind the unloading area. Such arrangement facilitates reducing the device size and saving the occupied space. In this context, the front and rear are relative to the operator, the front is close to the operator, and the rear is far away from the operator and close to the inner side of the cabinet.

[0014] The application also provides an operation method of the automatic marking device, which adopts the lead frame automatic marking device and comprises the following steps:

[0015] Step one: when the feeding trolley on the frame conveying rail is positioned in the waiting area, the material taking conveying device is driven to lower the lead frame onto the feeding trolley on the frame conveying rail;

[0016] Step two: the feeding trolley is driven to move towards the marking area, and when it is detected that the lead frame to be processed is conveyed to the marking detection position for direction detection, the movement of the feeding trolley is stopped, the marking machine is started to mark a two-dimensional code on the set position of the lead frame to be processed, and the two-dimensional code is recorded;

[0017] Step three: when the lead frame to be processed is processed on the marking detection position, the feeding trolley is continuously driven to move forward to the unloading area, the movement of the feeding trolley is stopped at the unloading station, and the unloading conveying mechanism is driven to transfer the lead frame to the designated receiving position on the material box conveying area;

[0018] Step four: while the feeding trolley is driven to return to the waiting area, the unloading conveying mechanism is driven to alternately place the paper sheet on the lead frame at the receiving position;

[0019] Step five: when it is detected that the lead frame loaded in the material box at the receiving position reaches a set number, the material box is transferred to the material box outlet area.

[0020] Preferably, in the step one, when it is detected that the feeding trolley on the paper sheet conveying rail is positioned in the waiting area, the material taking conveying device is driven to lower the paper sheet onto the feeding trolley on the paper sheet conveying rail, and then the feeding trolley on the paper sheet conveying rail is driven to move to the unloading area to wait for unloading.

[0021] Preferably, after the step five, a step six is further included, that is, the loading trolley is driven to move to the end of the empty material box area to move the empty material box in the empty material box area to the loading trolley, and the empty material box is used to load the lead frame at the designated receiving position.

[0022] Preferably, in the step five, when the material box is conveyed to the end of the material box outlet area, the second box pushing mechanism is used to push the material box from the loading trolley to the set position of the material box outlet area, and then the second box pushing mechanism is reset while the third box pushing mechanism is continuously used to push the material box. In this way, the loading trolley can return to the empty material box area in advance without waiting for the pushing arm to reset, thereby improving the operation efficiency of the assembly line. On the other hand, when the material box is taken away from the material box outlet area, the third box pushing mechanism can timely push the other material boxes outward, so that the operator can conveniently take away the material box.

[0023] In the present document, the first push box mechanism / second push box mechanism / third push box mechanism comprises a power component and at least one pushing piece fixedly connected with the power component, the power component can drive the pushing piece to make linear reciprocating motion, and the power component is a linear module, a hydraulic cylinder, an air cylinder, a synchronous belt transmission component or a spring, etc., and those skilled in the art can combine the power component with the pushing piece according to the control requirements of different application scenarios. The pushing piece can be a rod piece, a plate piece or a special-shaped component, etc.

[0024] In summary, due to the adoption of the technical solutions described above, the present application has the following beneficial effects:

[0025] The lead frame automatic marking equipment and operation method provided by the present application can realize automatic conveying of the lead frames to be processed and the separator paper, automatic marking of the lead frames, automatic feeding of empty material boxes, and automatic discharge of the processed lead frames after marking into the empty material boxes with the separator paper, etc. The marking process has little manual interference, greatly reduces the labor intensity of workers, and improves the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic diagram of a lead frame automatic marking equipment in embodiment 1;

[0027] Figure 2 is a top view of Figure 1 ;

[0028] Figure 3 is a structural schematic diagram of the internal structure of the feeding station;

[0029] Figure 4 is a structural schematic diagram of the conveying and marking station;

[0030] Figure 5 is a plane layout schematic diagram of the conveying and marking station;

[0031] Figure 6 is a schematic diagram of the initial state of the lead frame placed by the feeding trolley;

[0032] Figure 7 is a schematic diagram of the state of the lead frame transported by the feeding trolley in the limiting state;

[0033] Figure 8 is a schematic diagram of the internal structure of the discharging station;

[0034] Figure 9 is a plane layout schematic diagram of the feeding and discharging box platforms in the discharging station;

[0035] Figure 10 is a structural schematic diagram of the empty material box area and the discharging box area;

[0036] Figure 11is a structural schematic view of a material box conveying area;

[0037] Figure 12 is a structural schematic view of a third push box mechanism;

[0038] Figure 13 is a process flow diagram of a lead frame automatic marking device.

[0039] Icon: 1-feeding station; 11-suction mechanism; 12-clamping mechanism; 13-first lifting mechanism; 14-second lifting mechanism; 15-horizontal moving mechanism; 16-vertical moving mechanism; 17-limiting column; 2-conveying and marking station; 21-waiting area; 22-marking area; 23-unloading area; 24-frame conveying guide rail; 25-paper sheet conveying guide rail; 26-marking machine; 27-feeding trolley; 271-boss; 272-first stop block; 273-second stop block; 3-unloading station; 31-up and down loading box platform; 311-upper empty material box area; 3111-push rod; 312-material box conveying area; 3121-material box conveying mechanism; 3122-loading trolley; 313-outlet material box area; 3131-thrust arm; 3132-guiding shaft; 3133-push plate; 3134-push finger; 3135-stop block; 32-unloading conveying device; 33-blocking mechanism; 4-frame. DETAILED DESCRIPTION

[0040] The present application will be described in detail below with reference to the drawings.

[0041] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0042] Example 1

[0043] A lead frame 4 automatic marking device, as shown in Figures 1-12 , comprises a feeding station 1, a conveying and marking station 2 and an unloading station 3, the feeding station 1, the conveying and marking station 2 and the unloading station 3 are sequentially arranged from right to left, and the workbench of the unloading station 3 is located below the conveying and marking station 2, so as to save space. As shown in Figure 1 , Figure 3As shown, the feeding station 1 is divided into upper and lower regions, the upper region is the automatic operation region of the mechanism, the feeding station 1 is provided with a feeding position and a material taking transport device for taking material in the region, and a safety shield is provided around the feeding station 1. The safety shield mainly plays a role of safety protection and dust prevention, avoids personnel from accidentally entering the movement region of each mechanism to cause personnel injury, and reduces the pollution of dust to the exposed frame 4. The lower region is provided with a raw material storage space and an empty box placing drawer. The raw material storage space is mainly used for storing raw materials, and a protective gas inflation interface is provided at the side wall of the rack of the feeding station 1. Nitrogen, an inert protective gas, can be filled into the raw material storage space through the protective gas inflation interface to protect the frame 4. The empty box placing drawer is communicated with the raw material storage space and is mainly used for storing empty material boxes.

[0044] Specifically, as shown in the drawings, Figure 3 The feeding position is used for placing raw materials, lead frame 4 and separator paper, and is provided with 3×4 taking positions, a waste paper skin position, a spare paper sheet position and a manual feeding position. The waste paper skin position, the spare paper sheet position and the manual feeding position are sequentially arranged in a row at the front side of the taking positions. The taking positions are used for stacking the raw materials to be processed. The raw materials are alternately stacked lead frames and separator papers. The waste paper skin position is used for storing excess separator papers detected from the taking positions. When excess separator papers are placed between the adjacent two layers of lead frames in the taking positions, the material taking transport device directly sucks and places the excess separator papers to the waste paper skin position. The spare paper sheet position is used for supplementing separator papers. When the separator papers are missed between the adjacent two layers of frames in the taking positions, the material taking transport device is driven to move to the spare paper sheet position to obtain spare separator papers, and then the spare separator papers are placed at the specified position in the waiting area to ensure that there are separator papers between the frames after marking. The manual feeding position is used for recycling the raw materials not used in the taking positions. During feeding, the same batch of raw materials is placed in the manual feeding position by manual placement, and then the raw materials are automatically distributed to the specified taking positions by the material taking transport device. At the same time, the system automatically records the placement position corresponding to the raw materials of the corresponding batch number, so as to perform the marking work, reduce human intervention, effectively avoid the risk of confusing different batches of raw materials, and make it convenient for the operator to place the raw materials from the outermost side of the operation platform. The periphery of each feeding position is provided with a plurality of limiting columns 17. The top end of the limiting column 17 is specially designed in a tapered structure, which is in the shape of a bullet head, which can effectively prevent the material from being scraped off during taking. During use, the lead frames 4 and the separator papers are alternately stacked in each taking position to wait for taking.

[0045] The taking and transporting device adopts a gantry structure and is installed on the welded frame to ensure the stability of movement and realize movement in three directions of XYZ. The taking and transporting device can sequentially transport the lead frame 4 and the separator paper to the designated position of the transport marking station 2. The taking and transporting device comprises a suction mechanism 11, a clamping mechanism 12, a first lifting mechanism 13, a second lifting mechanism 14, a horizontal moving mechanism 15 and a longitudinal moving mechanism 16. The suction mechanism 11 is used to suck the lead frame 4 or the separator paper, the clamping mechanism 12 is used to clamp the raw material at the manual feeding position and distribute the raw material to the designated taking position, one end of the first lifting mechanism 13 is connected to the suction mechanism 11 and the other end is connected to the horizontal moving mechanism 15, one end of the second lifting mechanism 14 is connected to the clamping mechanism 12 and the other end is connected to the horizontal moving mechanism 15, the first lifting mechanism 13 can drive the suction mechanism 11 to move up and down reciprocally, the second lifting mechanism 14 can drive the clamping mechanism 12 to move up and down reciprocally, the horizontal moving mechanism 15 can drive the first lifting mechanism 13 and the second lifting mechanism 14 to move reciprocally and linearly in the horizontal direction, and the longitudinal moving mechanism 16 can drive the horizontal moving mechanism 15 to move reciprocally and linearly in the longitudinal direction. The first lifting mechanism 13, the second lifting mechanism 14, the horizontal moving mechanism 15 and the longitudinal moving mechanism 16 can all adopt a linear module driven by a screw motor, which has good and stable running precision. The taking and transporting device adopts a double-grabbing mode in the Z direction (i.e. the vertical direction) to realize taking and placing of the raw material (the lead frame 4 or the separator paper), distribution and recovery of the raw material. The suction mechanism 11 is provided with a metal sensor for detecting whether the current raw material to be sucked is metal (or a lead frame), so as to select a reasonable operation path plan according to the current operation process, such as placing the excess separator paper at the waste paper position from the current taking position and then returning to the original path to continue the taking operation of the lead frame at the current taking position, or moving to the standby paper position to obtain standby separator paper, and then transporting the separator paper to the designated position in the waiting area from the new planned path, so as to ensure the orderly production of the lead frame and avoid the overlapping or missing of the separator paper during feeding, which affects the efficiency of the subsequent process.

[0046] Further, as Figure 4 、 Figure 5As shown, the transport marking station 2 is provided with a frame transport guide rail 24, a paper sheet transport guide rail 25, a waiting area 21, a marking area 22 and a discharge area 23, the waiting area 21, the marking area 22 and the discharge area 23 are sequentially arranged from right to left, and the waiting area 21 is arranged adjacent to the side where the feeding bin is located, the frame transport guide rail 24 and the paper sheet transport guide rail 25 are arranged side by side and both extend from the waiting area 21 to the discharge area 23, the frame transport guide rail 24 and the paper sheet transport guide rail 25 are respectively provided with a feeding trolley 27, the feeding trolley 27 can make linear reciprocating motion on the frame transport guide rail 24 or the paper sheet transport guide rail 25, a marking machine 26 is arranged at the position of the marking area 22 and corresponds to the position of the frame transport guide rail 24, and the marking machine 26 realizes laser marking of the frame 4. The feeding trolley 27 on the frame transport guide rail 24 is used to transport the lead frame 4, the feeding trolley 27 on the paper sheet transport guide rail 25 is used to transport the paper sheet, and the feeding trolley 27 on the frame transport guide rail 24 passes through the marking area 22 to adopt the marking machine 26 to perform the marking step. The lead frame 4 and the paper sheet are transported to the discharge area 23 in sequence to perform discharge, the paper sheet in the feeding station 1 is reused, and the efficiency of packaging the frame 4 is improved. In the embodiment, the frame transport guide rail 24 and the paper sheet transport guide rail 25 both adopt a linear module structure, the feeding trolley 27 is fixedly connected with a module slider, and a lead screw motor is used to drive the feeding trolley 27 to make linear reciprocating motion. As shown in FIG. 2, the feeding trolley 27 is provided with a frame transport guide rail 24 and a paper sheet transport guide rail 25, the frame transport guide rail 24 and the paper sheet transport guide rail 25 are arranged side by side and both extend from the waiting area 21 to the discharge area 23, the frame transport guide rail 24 and the paper sheet transport guide rail 25 are respectively provided with a feeding trolley 27, the feeding trolley 27 can make linear reciprocating motion on the frame transport guide rail 24 or the paper sheet transport guide rail 25, a marking machine 26 is arranged at the position of the marking area 22 and corresponds to the position of the frame transport guide rail 24, and the marking machine 26 realizes laser marking of the frame 4. Figure 6 、 Figure 7As shown, the feeding trolley 27 is provided with a sheeting mechanism to ensure that the frame 4 or the paper sheet on the feeding trolley 27 is at the same position each time, ensuring the correct implementation of the next process. Specifically, the feeding trolley 27 used for placing the material on the bearing table is provided with an L-shaped boss 271 and a plurality of vacuum suction holes. The vacuum suction holes are used to flatly adsorb the lead frame 4 and the separator paper on the bearing table of the feeding trolley 27 through negative pressure. On the one hand, it is convenient for the material unloading and transporting device to unload the material. On the other hand, it can prevent the lead frame 4 or the separator paper from being slightly bent and deformed, which is beneficial to stabilize the two-dimensional code and ensure the marking quality. The inner side of the L-shaped boss 271 is used to limit the adjacent two side edges of the lead frame 4 or the paper sheet. The opposite side of the L-shaped boss is respectively provided with a first stop block 272 and a second stop block 273 for pushing the frame 4 or the paper sheet close to the boss 271. The first stop block 272 and the second stop block 273 are respectively used to contact the other two side edges of the lead frame 4 or the paper sheet. The first stop block 272 is connected with a first pushing assembly, and the second stop block 273 is connected with a second pushing assembly. The first pushing assembly can drive the first stop block 272 to push the lead frame 4 or the separator paper along the longitudinal direction of the line to move towards the side where the L-shaped boss 271 is located. The second pushing assembly can drive the second stop block 273 to push the lead frame 4 or the separator paper along the transverse direction of the line to move towards the side where the L-shaped boss 271 is located. Through the pushing of the first stop block 272 and the second stop block 273 on different side edges, the lead frame 4 or the separator paper is close to the L-shaped boss 271 to limit the position, which is beneficial to ensure that the lead frame 4 or the separator paper can always remain in a fixed position during transportation, thereby ensuring the marking quality. Correspondingly, the bearing table is respectively provided with grooves for the first stop block 272 and the second stop block 273 to slide. Further, as shown in Figure 4 As shown, the frame conveying guide rail 24 and the paper sheet conveying guide rail 25 are respectively provided with protective sheet metal covers at the circumferential side of the marking station, which mainly prevents the moving trolley from causing harm to people and avoids the marking dust from falling onto the frame 4 below the blanking station 3 to pollute the frame 4.

[0047] As shown in Figures 8-11As shown, the discharging station 3 is provided with a discharging conveying device 32 and an upper and lower discharging box platform 31, wherein the discharging conveying device 32 is installed above the discharging area 23 for facilitating transportation operation, and the upper and lower discharging box platform 31 is arranged below the discharging area 23. The upper and lower discharging box platform 31 comprises an upper empty box area 311, a discharging box area 313 and a box conveying area 312, the upper empty box area 311 and the discharging box area 313 are arranged side by side, and the box conveying area 312 is arranged at the same end of the upper empty box area 311 and the discharging box area 313. The box conveying area 312 is located behind the discharging area 23, and is used for receiving the empty boxes in the upper empty box area 311 and providing a conveying space. The upper empty box area 311 is used for placing empty boxes, and the discharging box area 313 is used for placing the lead frame 4 after reloading and completing the marking process and the discharging box after placing the separator paper alternately. Specifically, the upper empty box area 311 is provided with a first box pushing mechanism capable of linear reciprocating motion, the first box pushing mechanism is arranged below the bearing table in the upper empty box area 311, and the first box pushing mechanism comprises a linear module and two push rods 3111 fixedly connected with the upper sliding block of the linear module. Correspondingly, the bearing table of the upper empty box area 311 is provided with two sliding grooves for the sliding of the push rods 3111. The empty boxes can be moved from the upper empty box area 311 to the side of the box conveying area 312 under the action of the first box pushing mechanism. A blocking mechanism 33 can be further arranged on the side of the box conveying area 312 facing the upper empty box area 311, for preventing the empty boxes from being pushed out by mistake. The blocking mechanism 33 can adopt components such as hydraulic cylinders or air cylinders. The box conveying area 312 is provided with a box conveying mechanism 3121 and a loading trolley 3122. The box conveying mechanism 3121 can drive the loading trolley 3122 to make linear reciprocating motion between the end of the upper empty box area 311 and the end of the discharging box area 313. The box conveying mechanism 3121 can adopt a linear module structure. Further, the discharging box area 313 is provided with a second box pushing mechanism and a third box pushing mechanism capable of linear reciprocating motion. The second box pushing mechanism comprises a linear guide rail, a first synchronous belt assembly and an L-shaped thrust arm 3131. The linear guide rail is arranged on the outer side wall of the discharging box area 313. The L-shaped thrust arm 3131 is both slidingly connected with the linear guide rail and fixedly connected with the first synchronous belt assembly. The L-shaped thrust arm 3131 is driven by the first synchronous belt assembly to make linear reciprocating motion along the linear guide rail. The arrangement of the L-shaped thrust arm 3131 can push the discharging box on the loading trolley 3122 in the box conveying area 312 to the end of the discharging box area 313. The third box pushing mechanism is used to receive the discharging box driven by the second box pushing mechanism. Specifically, as shown in FIG. 2, the third box pushing mechanism comprises a linear module and a second synchronous belt assembly. The linear module is arranged on the outer side wall of the discharging box area 313, and the second synchronous belt assembly is fixedly connected with the linear module. The second synchronous belt assembly drives the L-shaped thrust arm 3131 to make linear reciprocating motion along the linear module. The arrangement of the L-shaped thrust arm 3131 can push the discharging box on the loading trolley 3122 in the box conveying area 312 to the end of the discharging box area 313. Figure 12As shown, the third push box mechanism includes a second synchronous belt assembly, a guide shaft 3132 and a push plate 3133. The second synchronous belt assembly is arranged at the bottom of the carrying table at the discharge box area 313. The second synchronous belt assembly is fixedly connected with the push plate 3133. The second synchronous belt assembly drives the push plate 3133 to make linear reciprocating motion. The guide shaft 3132 is respectively sleeved at both ends of the push plate 3133. The top of the push plate 3133 is provided with two grooves. One push finger 3134 is arranged at each groove. The push finger 3134 is hingedly connected with the push plate 3133 body. The top end of the push finger 3134 extends out of the carrying table for pushing the feeding box. The inner side surface of the push finger 3134 can be in contact with the side surface of the push plate 3133 body facing the location of the box conveying area. The side of the push plate 3133 away from the box conveying area is fixedly connected with a stop block 3135 for limiting the push finger 3134 from being excessively deflected. The push finger 3134 can rely on gravity to be in an upright state. The push finger 3134 can be rotated under the action of external force. When the second push box mechanism pushes the box to the location of the push finger 3134, with the advancement of the box, the push finger 3134 is deflected until it is buried directly below the box. When the box completely passes through the location of the push finger 3134, the push finger 3134 returns to the upright state relying on gravity. At this time, the second push box mechanism is reset to the outside of the box conveying area, and the third push box mechanism is driven to continue pushing the box outward. At this time, the push finger 3134 can be in contact with the box under the limiting of the side surface of the push plate 3133 and is driven by the second synchronous belt assembly to move outward, thereby driving the box to move outward. In this way, on the one hand, the loading trolley can return to the upper box area 311 in advance without waiting for the push arm 3131 to reset, and on the other hand, when the discharge box area 313 has a box taken away, the third push box mechanism can timely push other boxes outward so as to facilitate the operator to take away the box. In the process of discharging, the empty box in the upper box area 311 is pushed by the first push box mechanism and blocked by the blocking mechanism 33 to be repositioned, waiting for the loading trolley 3122 to reset.

[0048] The down conveying device 32 is used for alternately taking away the lead frame 4 and the separator paper on the feeding trolley 27 in the discharging area 23 and then putting them into the box in the designated receiving position (i.e., the receiving position) of the box conveying area 312. In the embodiment, the position where the loading trolley 3122 is located when it is conveyed to the end of the discharge box area 313 is preferably taken as the receiving position. The box can be smoothly transferred in a seamless manner under the action of the first push box mechanism, the second push box mechanism and the box conveying mechanism 3121, and the work efficiency is high.

[0049] The automatic marking equipment for the lead frame 4 can realize automatic conveying of the lead frame 4 and the paper sheet in the raw material box, automatic marking of the lead frame 4, automatic feeding of the empty material box, automatic feeding of the processed lead frame 4 after marking into the empty material box, and the like, and the marking process has little manual interference, greatly reduces the labor intensity and improves the work efficiency.

[0050] It should be noted that in the above embodiment, the structure capable of linear reciprocating motion can be realized in various combinations. The linear module is a common way. In addition to the above examples, hydraulic cylinders, pneumatic cylinders, synchronous belt transmission components or springs and the like or various component combinations can also be used. The specific structure form can be reasonably selected according to the design requirements, and is not limited to the above examples. In addition, the material taking and conveying device, the frame conveying rail 24, the paper sheet conveying rail 25, the first and second box pushing mechanisms, the material box conveying mechanism 3121 and the discharging conveying device 32 and the like can be linked through an electrical control system and automatically work along a set route according to a set instruction.

[0051] Embodiment 2

[0052] The embodiment also provides an operation method of the automatic marking equipment, as shown in Figure 13 The embodiment also provides an operation method of the automatic marking equipment, as shown in

[0053] Step one, when the feeding trolley 27 on the frame conveying rail 24 is in place in the waiting area 21, the material taking and conveying device is driven to lower the lead frame 4 onto the feeding trolley 27 on the frame conveying rail 24;

[0054] Step two, the feeding trolley 27 is driven to move towards the marking area 22. When it is detected that the lead frame 4 to be processed is conveyed to the marking detection position for direction detection, the feeding trolley 27 stops moving, the marking machine 26 is started to mark a two-dimensional code on the set position of the lead frame 4 to be processed and record the two-dimensional code;

[0055] Step three, when the lead frame 4 to be processed completes the processing on the marking detection position, the feeding trolley 27 continues to be driven to move forward and move towards the discharging area 23. The feeding trolley 27 stops moving at the discharging position, and the discharging conveying mechanism is driven to transfer the lead frame 4 to the designated receiving position on the material box conveying area 312;

[0056] Step four, according to the vacuum pressure condition of the feeding trolley, when the lead frame on the feeding trolley is taken away, the feeding trolley 27 is driven to return to the waiting area 21, and the discharging conveying mechanism is driven to alternately place the paper sheet on the lead frame 4 at the receiving position;

[0057] Step five, when the detected loading position of the magazine loaded lead frame 4 to the set number, the magazine is transferred to the out of the magazine area 313 by the second push box mechanism, and then pushed out by the third push box mechanism.

[0058] In the process of the feeding trolley running, position sensing switches can be arranged at the waiting area, marking area and unloading area of the frame transport guide rail and the waiting area and unloading area of the paper sheet transport guide rail, for judging the running position of the feeding trolley, so that the controller can make corresponding decisions; the specific arrival position of the feeding trolley can also be directly set by the program, and an alarm prompt can be given when an abnormality occurs. The specific control mode is not limited to the above examples, and the relevant control principle is prior art, which will not be described here.

[0059] In step one, when the feeding trolley 27 on the paper sheet transport guide rail 25 is detected to be in position at the waiting area 21, the paper sheet transport guide rail 25 is driven to move to the unloading area 23 to wait for unloading.

[0060] After step five, step six is further included: after the loaded magazine on the trolley is unloaded, the second push box mechanism is reset, and then the loaded trolley 3122 is returned to the end of the upper empty magazine area 311 by driving the magazine transport mechanism 3121, so as to move the empty magazine in the upper empty magazine area 311 to the loaded trolley 3122, and the empty magazine is used to load the lead frame 4 at the designated loading position. At the same time of resetting the second push box mechanism, the third push box mechanism is driven to continue pushing the feeding magazine to push it outwards.

[0061] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lead frame automatic marking apparatus characterized by, Including loading station (1), transport marking station (2) and unloading station (3), the loading station (1), transport marking station (2) and unloading station (3) are sequentially arranged, the loading station (1) is provided with loading position and material taking transport device, the loading position is used for placing lead frame (4) and separator paper, the material taking transport device can transfer lead frame (4) or separator paper at the loading position to the designated position of the transport marking station (2); The material taking transport device includes adsorption mechanism (11), clamping mechanism (12), first lifting mechanism (13), second lifting mechanism (14), transverse movement mechanism (15) and longitudinal movement mechanism (16), one end of the first lifting mechanism (13) is connected with the adsorption mechanism (11), the other end is connected with the transverse movement mechanism (15), one end of the second lifting mechanism (14) is connected with the clamping mechanism (12), the other end is connected with the transverse movement mechanism (15), the first lifting mechanism (13) can drive the adsorption mechanism (11) to reciprocate up and down, the second lifting mechanism (14) can drive the clamping mechanism (12) to reciprocate up and down, the transverse movement mechanism (15) can drive the first lifting mechanism (13) and the second lifting mechanism (14) to reciprocate linearly along the transverse direction, the longitudinal movement mechanism (16) can drive the transverse movement mechanism (15) to reciprocate linearly along the longitudinal direction; The transport marking station (2) is provided with frame transport guide rail (24), paper sheet transport guide rail (25), waiting area (21), marking area (22) and unloading area (23), the waiting area (21), marking area (22) and unloading area (23) are sequentially arranged, the frame transport guide rail (24) and paper sheet transport guide rail (25) are arranged side by side and both extend from the waiting area (21) to the unloading area (23), the frame transport guide rail (24) and paper sheet transport guide rail (25) are respectively provided with feeding trolley (27), the feeding trolley (27) can reciprocate linearly on the frame transport guide rail (24) or paper sheet transport guide rail (25), the marking machine (26) is arranged at the position of the marking area (22) and corresponds to the position of the frame transport guide rail (24). The blanking station (3) is provided with a blanking conveying device (32) and an upper and lower blanking box platform (31), the upper and lower blanking box platform (31) comprises an upper empty blanking box area (311), a blanking box discharging area (313) and a blanking box conveying area (312), the upper empty blanking box area (311) and the blanking box discharging area (313) are arranged side by side, and the blanking box conveying area (312) is arranged at the same end of the upper empty blanking box area (311) and the blanking box discharging area (313), the upper empty blanking box area (311) and the blanking box discharging area (313) are used for placing blanking boxes, the blanking boxes can be moved from the upper empty blanking box area (311) to the side where the blanking box conveying area (312) is located under the action of a first blanking box pushing mechanism, and the blanking boxes can be pushed from the side where the blanking box conveying area (312) is located to the blanking box discharging area (313) under the action of a second blanking box pushing mechanism, the blanking box conveying area (312) is provided with a blanking box conveying mechanism (3121) and a loading trolley (3122), the blanking box conveying mechanism (3121) can drive the loading trolley (3122) to reciprocate between the upper empty blanking box area (311) and the blanking box discharging area (313), and the blanking conveying device (32) is used for alternately transferring lead frame (4) and separator paper in the discharging area (23) to a designated receiving position of the blanking box conveying area (312).

2. The lead frame automatic marking apparatus according to claim 1, wherein The upper feeding position comprises 3*4 waiting positions, 1 waste paper skin position, 1 spare paper sheet position and 1 manual feeding position, and the waste paper skin position, the spare paper sheet position and the manual feeding position are sequentially arranged at the frontmost side of one row of the waiting positions.

3. The lead frame automatic marking apparatus according to claim 2, wherein The periphery of each of the upper feeding positions is provided with a plurality of limiting columns (17), and the top end of the limiting column (17) is in the shape of a bullet head.

4. The lead frame automatic marking apparatus according to claim 1, wherein The L-shaped boss (271) is provided with a first stop block (272) and a second stop block (273) on opposite sides, the first stop block (272) is connected with a first pushing assembly, the second stop block (273) is connected with a second pushing assembly, the first pushing assembly can drive the first stop block (272) to push the lead frame (4) or the separator paper on the carrying table in the longitudinal direction of the line, and the second pushing assembly can drive the second stop block (273) to push the lead frame (4) or the separator paper on the carrying table in the transverse direction of the line.

5. An apparatus for automatically marking lead frames as recited in any of claims 1-4, wherein, The upper and lower blanking box platform (31) is located below the discharging area (23), and the blanking box conveying area (312) is located behind the discharging area (23).

6. A method of automated marking operation, characterized in that, The implementation steps of the lead frame automatic marking equipment of any one of claims 1-5 comprise: Step one: after the feeding trolley (27) on the frame conveying guide rail (24) is in place in the waiting area (21), the material taking conveying device is driven to lower the lead frame (4) onto the feeding trolley (27) on the frame conveying guide rail (24); Step two, drive the feeding trolley (27) to move to the marking area (22), when detecting that the lead frame (4) to be processed is transported to the marking detection position for direction detection, stop the feeding trolley (27) from moving, start the marking machine (26) to mark a two-dimensional code on the set position of the lead frame (4) to be processed and record the two-dimensional code; Step three, when the lead frame (4) to be processed completes the processing on the marking detection position, continue to drive the feeding trolley (27) to move forward to the unloading area (23), stop the feeding trolley (27) at the unloading position, and drive the unloading conveying mechanism to transfer the lead frame (4) to the designated receiving position on the magazine conveying area (312); Step four, drive the feeding trolley (27) to return to the waiting area (21) while driving the unloading conveying mechanism to alternately place the separator paper on the lead frame (4) at the receiving position; Step five, when detecting that the lead frame (4) loaded in the magazine at the receiving position reaches the set number, transfer the magazine to the magazine outlet area (313).

7. The method of claim 6, wherein, In the step one, when detecting that the feeding trolley (27) on the paper sheet conveying rail (25) is in place at the waiting area (21), drive the material taking conveying device to place the separator paper on the feeding trolley (27) on the paper sheet conveying rail (25); then drive the feeding trolley (27) on the paper sheet conveying rail (25) to move to the unloading area (23) to wait for unloading.

8. A method of automated marking operation according to claim 6 or 7, characterized in that, After the step five, a step six is further included: drive the loading trolley (3122) to move to the end of the upper magazine area (311) to move the empty magazine in the upper magazine area (311) to the loading trolley (3122).

9. The method of claim 6 or 7, wherein, In the step five, when the magazine is transported to the end of the magazine outlet area (313), the second magazine pushing mechanism is used to push the magazine from the loading trolley (3122) to the set position of the magazine outlet area (313); then the second magazine pushing mechanism is reset while the third magazine pushing mechanism continues to push the magazine.

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