Pin slotting equipment

Abstract

The utility model discloses a pin grooving device. Core components comprise a three-axis electric displacement platform, a motor, a milling cutter, a machining table, a feeding pipe, an air cylinder and the like. According to the working process, a feeding air cylinder pushes a chip to a designated position, a micro air cylinder is matched with a pressing plate to fix the chip, a motor drives a milling cutter, precise grooving is completed in combination with a three-axis electric displacement platform, and the machined chip falls into a collecting box. In the grooving design, the depth is accurately controlled to be 0.1-0.13 mm, that is, the thickness of the frame is 50%, the width is kept to be 0.05-0.1 mm, the position is close to the edge of a pin, and the welding effect is comprehensively optimized. According to the machining process, burrs are polished first and then electroplating is conducted after cutting and slotting, and the product reliability is effectively improved. A microscope is adopted to observe the electroplated QFN side surface, and the tin climbing height exceeds 50% of the height of a pin as a qualified standard, so that accurate quality detection is realized. According to the equipment, full-automatic production is achieved, the machining efficiency and precision are greatly improved, and traditional machining problems are effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to chip manufacturing technical field especially relates to a pin slotting equipment. BACKGROUND

[0002] In the chip manufacturing field, the design and processing quality of the pin plays a key role in the performance and reliability of the chip. With the continuous development of electronic equipment towards miniaturization and high performance, the requirements for chip pins are increasingly stringent. The traditional pin processing method gradually fails to meet the modern production needs in terms of precision and efficiency.

[0003] On the one hand, in the depth control of pin slotting, the previous technology cannot accurately ensure that the groove depth is within the ideal range. If the depth is too deep, the mechanical strength of the pin will decrease significantly, and during subsequent use and transportation, if the groove depth of small QFN pins exceeds 0.15mm, it is easy to break. If the depth is too shallow, the liquid (nickel, palladium, gold) cannot fully climb along the groove, and the contact area with the side pin cannot be effectively increased, thereby affecting the electrical performance of the chip.

[0004] On the other hand, regarding the width of the pin slot, it is difficult for the traditional process to accurately control the reasonable range that can allow the liquid tin to enter smoothly without reducing the effective conductive area of the pin. If the width is too narrow, it will be difficult for the liquid tin to enter the groove, resulting in insecure welding; if the width is too wide, the effective conductive area of the pin will be reduced, affecting the electrical performance of the chip.

[0005] At the same time, in the determination of the position of the pin slot, the previous method lacks sufficient consideration of the climbing effect of the liquid tin, and cannot effectively utilize the characteristics of the liquid tin climbing from the edge of the pin, making it difficult to improve the side tin climbing effect by optimizing the slotting position, thereby affecting the welding quality.

[0006] In addition, after the completion of the traditional pin cutting and slotting process, the burrs are often ignored and directly subjected to electroplating, and the existence of small burrs can easily lead to insufficient insulation distance between adjacent pins, thereby causing short circuit failure, seriously affecting the reliability and stability of the product. Moreover, in the evaluation of the tin climbing effect, the traditional method lacks intuitive and quantitative evaluation standards, making it difficult to accurately determine whether the product truly meets the welding quality requirements.

[0007] In summary, it is urgent to develop a pin slotting equipment that can accurately control the depth, width and position of the pin slot, effectively treat burrs, and has a scientific tin climbing effect evaluation method, which is of great significance for improving the quality and efficiency of chip production and promoting the development of electronic industry. UTILITY MODEL CONTENTS

[0008] The utility model aims at solving the shortcomings in the prior art and provides a pin slotting equipment.

[0009] To achieve the above object, the utility model adopts the following technical scheme:

[0010] A pin slotting equipment, including three axis electric displacement platform, three axis electric displacement platform bottom is equipped with motor, motor bottom output is equipped with handle, handle bottom is equipped with milling cutter, milling cutter below is equipped with processing table, the top of processing table is provided with a chute, the inside center of chute is slidably embedded with a chip, the top of chip is provided with a pressing plate, the bottom of both ends of pressing plate is provided with a micro air cylinder, micro air cylinder is embedded in the inside of processing table, the top of one end of chute is vertically provided with a feeding pipe, the inside of feeding pipe is stacked with a plurality of chips to be processed, one end of processing table is transversely provided with a feeding cylinder.

[0011] Preferably, the processing table is provided with a collecting box away from the feeding cylinder.

[0012] Preferably, the step width of the chip pin slotting is set to 0.05-0.1mm.

[0013] Further, the chip pin slotting is controlled to be between 0.1-0.13mm.

[0014] Further, the equipment further includes an electrical control system, the electrical control system is electrically connected with the three axis electric displacement platform, the motor, the micro air cylinder and the feeding cylinder; the electrical control system is configured to: first control the feeding cylinder to push the chip to the processing position, then control the micro air cylinder to extend the piston rod to fix the chip with the pressing plate, then start the motor and control the three axis electric displacement platform to drive the milling cutter to slot the chip pin, after processing, control the micro air cylinder to retract the piston rod to release the chip, and then control the feeding cylinder to continue feeding to push the processed chip to the collecting box.

[0015] The utility model has the advantages that:

[0016] 1. This pin slotting equipment has obvious advantages. In terms of automatic processing, through the cooperative operation of the three axis electric displacement platform, the motor, the milling cutter, the processing table and various types of cylinders, automatic slotting of the chip pin is realized, the feeding pipe and the feeding cylinder cooperate to automatically feed, the micro air cylinder and the pressing plate stabilize the chip, the collecting box is convenient for collecting finished products, which greatly improves the processing efficiency and reduces the labor cost.

[0017] 2. In the design optimization of the pin slotting, the depth is accurately controlled to be between 50% of the frame thickness (0.1-0.13mm), which avoids excessive depth to weaken the mechanical strength of the pin, while ensuring that the liquid (nickel, palladium and gold) climbs along the slot to increase the contact area with the side pin, thereby maintaining the mechanical performance of the pin; the step width is set to 0.05-0.1mm, which takes into account the entry of liquid tin and the pin conductive performance, thereby ensuring the welding effect and electrical performance; the slot is arranged near the edge of the pin, which is beneficial for the liquid tin to quickly enter the slot and climb upward along the slot, thereby effectively improving the side tin climbing effect and enhancing the welding quality.

[0018] 3. Process improvement, the pin is cut after cutting the slot, and then the burr is polished, so as to avoid the short circuit caused by the small burr leading to the insufficient insulation distance of adjacent pins, and improve the product reliability. In the evaluation of tin climbing effect, the QFN side after electroplating is directly observed by microscope, and the height of the side climbing tin is more than 50% of the height of the pin, which is the standard for evaluating the height, uniformity and continuity of the climbing tin, so as to provide an intuitive and quantitative evaluation method for product quality detection, and ensure that the product meets the welding quality requirements.

[0019] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail, and the accompanying drawings are as follows. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A perspective view of a pin slotting device according to the present application is shown in the figure;

[0021] Figure 2 A front view of a pin slotting device according to the present application is shown in the figure;

[0022] Figure 3 A perspective view of a pin slotting device according to the present application is shown in the figure;

[0023] Figure 4 A perspective view of a pin slotting device according to the present application is shown in the figure; Figure 3 An enlarged view of the local structure of A in the figure.

[0024] In the figure: 1, three-axis electric displacement platform; 2, motor; 3, tool holder; 4, milling cutter; 5, machining table; 6, sliding groove; 7, chip; 8, pressing plate; 9, micro pneumatic cylinder; 10, feeding pipe; 11, feeding cylinder; 12, collection box. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0026] Embodiment 1, refer to Figures 1 to 4

[0027] The utility model provides a kind of pin slotting equipment, it is mainly by three-axis electric displacement platform 1, motor 2, tool holder 3, milling cutter 4, processing table 5, sliding groove 6, chip 7, pressing plate 8, miniature cylinder 9, feeding pipe 10, feeding cylinder 11 and collection box 12 etc.

[0028] Specific implementation steps

[0029] I, preparation

[0030] Equipment inspection

[0031] Check whether the operation of three-axis electric displacement platform 1 is smooth, ensure that the motion accuracy of its three coordinate axes meets the requirements. It can be observed whether the movement in each direction is smooth, and whether there is jamming or abnormal sound by manually operating the displacement platform.

[0032] Check whether the connection of motor 2 is firm, and whether the power supply is normal. Turn on the motor power, listen to whether the motor starting sound is normal, if there is abnormal sound, the motor fault needs to be checked.

[0033] Check the installation of milling cutter 4, ensure that the milling cutter is firmly and reliably installed on the tool holder 3, and the cutting edge of the milling cutter is not damaged. If the milling cutter is worn or damaged, it should be replaced in time.

[0034] Check whether the air pressure of miniature cylinder 9 and feeding cylinder 11 is sufficient, and whether the connecting pipeline of the cylinder has air leakage phenomenon. It can be judged whether the air pressure is normal by observing the value of pressure gauge, and whether there is air leakage by checking whether there is bubble produced by smearing soap water on the connecting pipeline.

[0035] Parameter setting

[0036] According to the process requirements of chip 7 pin slotting, set the motion trajectory, slotting depth and step width of milling cutter 4 in the control system of three-axis electric displacement platform 1. The step width of chip 7 pin slotting is set to 0.05-0.1mm, and the slotting depth is controlled to 0.1-0.13mm.

[0037] Set the action time and stroke of feeding cylinder 11 and miniature cylinder 9 to ensure that the feeding and fixing operation of chip is accurate.

[0038] Chip feeding

[0039] Put the chip 7 to be processed into the feeding pipe 10 in turn, and the chips are naturally stacked under the action of gravity. Ensure that the chips in the feeding pipe 10 are arranged neatly, and there is no jamming phenomenon.

[0040] II, chip processing process

[0041] Chip feeding

[0042] Start the loading cylinder 11, the piston rod of the loading cylinder extends, pushes the chip 7 located below the loading pipe 10, makes it slide along the chute 6 on the top of the processing table 5 to the direction of the milling cutter 4. The stroke of the loading cylinder 11 should be accurately adjusted according to the length of the chute 6 and the size of the chip 7, to ensure that the chip can accurately reach the processing position.

[0043] Chip fixing

[0044] When the chip 7 slides to the specified processing position, the micro cylinder 9 starts, its piston rod extends, pushes the pressing plate 8 to move downward. The pressing plate 8 tightly presses the chip 7 in the chute 6, ensuring that the chip will not displace during processing, thereby ensuring the processing accuracy.

[0045] Grooving processing

[0046] Start the motor 2, the motor drives the tool holder 3 to rotate, and then makes the milling cutter 4 rotate at high speed. At the same time, the three-axis electric displacement platform 1 starts to work according to the preset parameters, controls the milling cutter 4 to perform accurate grooving operation at the pin position of the chip 7.

[0047] The milling cutter 4 mills the pin of the chip 7 under the drive of the motor 2, processes according to the set step width range of 0.05-0.1mm and the groove depth range of 0.1-0.13mm. During processing, the three-axis electric displacement platform 1 accurately controls the motion trail of the milling cutter 4, to ensure the size accuracy and surface quality of the groove.

[0048] Post-processing

[0049] When the pin grooving processing of the chip 7 is completed, the piston rod of the micro cylinder 9 retracts, the pressing plate 8 rises, and the chip 7 is released.

[0050] The loading cylinder 11 continues to push the next chip to be processed into the processing position, and the processed chip 7 is pushed out of the other end of the chute 6 by the subsequent chip, and falls into the collection box 12 set at one end of the processing table 5.

[0051] III. Equipment maintenance and cleaning

[0052] Regular maintenance

[0053] Regularly lubricate and calibrate the three-axis electric displacement platform 1 to ensure its motion accuracy. According to the requirements of the equipment instruction manual, add lubricating oil to the guide rails, lead screws and other parts of the displacement platform at the specified time interval.

[0054] Regularly check the bearings, cooling fans and other components of the motor 2 to ensure the normal operation of the motor. If the bearings are found to be worn or the cooling fans are found to be faulty, they should be replaced in time.

[0055] Periodically clean the chips and oil on the milling cutter 4, keep the sharpness of the milling cutter. Special tool cleaning agent and brush can be used to clean the milling cutter.

[0056] Cleaning work

[0057] After each processing is completed, clean the chips and debris in the processing table 5 and the chute 6, prevent the accumulation of chips affecting the chip feeding and processing accuracy. Compressed air or vacuum cleaner can be used to clean the chips.

[0058] Periodically clean the collection box 12, take out the processed chips, and clean the chips and dust in the box.

[0059] Notes

[0060] During the operation of the equipment, the operator should stay away from the rotating area of the milling cutter 4 to prevent safety accidents.

[0061] When the equipment fails or abnormally, stop the operation immediately and check and repair. Do not continue to run in the fault state of the equipment.

[0062] The operator should strictly follow the operation procedures, regularly maintain and maintain the equipment, and ensure the normal operation of the equipment and the processing quality.

[0063] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A pin slotting apparatus comprising a three-axis motorized displacement platform (1), characterized in that, The bottom of the three-axis electric displacement platform (1) is provided with a motor (2), the bottom output end of the motor (2) is provided with a tool holder (3), the bottom of the tool holder (3) is provided with a milling cutter (4), the lower side of the milling cutter (4) is provided with a machining table (5), the top of the machining table (5) is provided with a chute (6), the inside of the chute (6) is slidably embedded with a chip (7), the top of the chip (7) is provided with a pressing plate (8), the bottom of both ends of the pressing plate (8) is provided with a micro air cylinder (9), the micro air cylinder (9) is embedded in the inside of the machining table (5), the top of one end of the chute (6) is vertically provided with a feeding pipe (10), a plurality of chips (7) to be processed are stacked in the inside of the feeding pipe (10), and one end of the machining table (5) is transversely provided with a feeding cylinder (11).

2. A pin slotting apparatus according to claim 1, wherein The end of the machining table (5) away from the feeding cylinder (11) is provided with a collecting box (12).

3. A pin slotting apparatus according to claim 1, wherein The width of the slot of the chip (7) is set to be 0.05-0.1mm.

4. The pin slotting apparatus of claim 1, wherein The slot of the chip (7) is controlled to be 0.1-0.13mm.

5. The pin slotting apparatus of claim 1, wherein The device further comprises an electrical control system, which is electrically connected with the three-axis electric displacement platform (1), the motor (2), the micro air cylinder (9) and the feeding cylinder (11); the electrical control system is configured to: first control the feeding cylinder (11) to push the chip (7) to the machining position, then control the micro air cylinder (9) to extend the piston rod to fix the chip (7) with the pressing plate (8), then start the motor (2) and control the three-axis electric displacement platform (1) to drive the milling cutter (4) to groove the chip (7), after the machining is completed, control the micro air cylinder (9) to retract the piston rod to release the chip (7), and then control the feeding cylinder (11) to continue feeding to push the machined chip (7) to the collecting box (12).

Images