Pre-pressing device for bending material sheet in place detection and chip processing equipment

Abstract

The utility model provides a kind of pre-pressing device and chip processing equipment of bending piece in place detection.The pre-pressing device includes support frame, clamping jaw mechanism, pressing piece mechanism and driving part;Pressing piece mechanism is vertically slidably arranged in support frame, and it includes pressing block, guide column and counterweight block;Pressing block is below support frame, and it is used to press piece;Counterweight block is above support frame, and guide column is movably connected to support frame vertically, and its two ends are connected with pressing block and counterweight block respectively;When clamping jaw mechanism grabs piece, driving part lifts counterweight block, so that pressing block moves upward and then separates from piece;When clamping jaw mechanism drops piece, driving part drops counterweight block, and pressing block moves downward and abuts with piece, so as to flatten piece.By setting pressing piece mechanism, it can improve detection accuracy, avoid false alarm caused by bending of piece itself, and improve work efficiency;And pressing piece mechanism moves with pre-pressing device, and it will not affect subsequent stamping operation.

Description

Technical Field

[0001] This utility model relates to the field of chip processing technology, and in particular to a pre-pressing device and chip processing equipment for detecting the positioning of bent wafers. Background Technology

[0002] After multiple chip cores are encapsulated, they need to be stamped to remove them. Because the chips are small, the wafers must be precisely placed on the stamping platform before stamping; otherwise, both the chip and the mold will be damaged. Figure 1 and Figure 2 As shown, a positioning pin 901 is typically installed on the stamping base 900. The positioning hole 801 on the sheet 800 should be aligned with the positioning pin 901 on the base. If the positioning pin 901 enters the positioning hole 801, it indicates accurate placement. If the positioning pin 901 lifts the sheet 800, it indicates inaccurate placement. Whether the sheet 800 is accurately placed can be determined by detecting whether the sheet 800 is lifted by a detector.

[0003] Due to the cooling process after plastic sealing, the sheet 800 is under tension and deformed. The irregular deformation causes the sheet 800 to be uneven. Even if the positioning hole 801 of the sheet 800 is accurately aligned with the positioning pin 901 after being placed on the stamping base, it may still tilt up due to deformation, blocking the detector and affecting the accuracy of the detection, which in turn affects the stamping operation. Utility Model Content

[0004] This invention provides a pre-compression device and chip processing equipment for detecting the arrival of bent sheet material, avoiding false alarms caused by sheet bending and improving work efficiency.

[0005] This utility model provides a pre-compression device for detecting the positioning of a bent sheet, including a support frame, a gripper mechanism, a sheet pressing mechanism, and a driving component; The gripper mechanism is mounted on the support frame and is used to pick up and place the sheet material located below the support frame; The pressing plate mechanism is slidably mounted vertically on the support frame, and includes a pressing block, a guide column, and a counterweight. The pressing block is located below the support frame and is used to press the pressing plate. The counterweight is located above the support frame, and the guide column is movably connected to the support frame vertically, with its two ends connected to the pressing block and the counterweight, respectively. The driving component is mounted on the support frame and connected to the counterweight, and is used to drive the counterweight to move vertically, thereby driving the pressure block to move up and down together through the guide column; When the gripper mechanism picks up the sheet, the drive member lifts the counterweight so that the pressure block moves upward and separates from the sheet; when the gripper mechanism lowers the sheet, the drive member lowers the counterweight, the pressure block moves downward and abuts against the sheet so as to flatten the position on the sheet corresponding to the pressure block.

[0006] The driving component includes a driving rod, which is vertically movable. When the driving rod moves upward, its top end abuts against the counterweight, thereby lifting the counterweight upward and causing the entire pressing plate mechanism to move upward. When the gripper mechanism lowers the plate, the driving rod moves downward until it separates from the counterweight, and the pressing plate mechanism moves downward under its own weight.

[0007] The driving component is a cylinder, and its piston rod forms the driving rod.

[0008] The pressure block and the counterweight are both elongated strips arranged horizontally and are parallel to each other; there are multiple guide posts arranged along the length of the pressure block.

[0009] The driving component is located at the middle position along the length of the counterweight.

[0010] The support frame is equipped with a position detector at its top to detect the vertical position of the counterweight.

[0011] The position detector is one of a through-beam sensor, a laser sensor, a capacitive sensor, and a proximity switch.

[0012] There are two or more pressing plate mechanisms, and their arrangement direction is perpendicular to the length direction of the counterweight.

[0013] The support frame is equipped with a linear bearing, and the guide column passes through the linear bearing.

[0014] On the other hand, this utility model also provides a chip processing equipment, including a stamping device, a robot, and the aforementioned pre-pressing device for detecting the arrival of bent sheet. The stamping device includes a stamping base, and the robot is connected to the support frame of the pre-pressing device for driving the pre-pressing device in and out of the stamping device, thereby placing the sheet on the stamping base.

[0015] This utility model provides a pre-pressing device and chip processing equipment for detecting bent sheet positioning. If the positioning hole of the sheet aligns with the positioning pin, the positioning pin enters the positioning hole under the action of the pressing block, and the sheet can be flattened by the pressing block, avoiding the influence of sheet bending deformation on detection accuracy. After the sheet pressing mechanism moves out of the stamping device along with the pre-pressing device, the stamping device begins the sheet stamping operation. By setting the sheet pressing mechanism on the pre-pressing device, detection accuracy can be improved, false alarms caused by the bending of the sheet itself can be avoided, and work efficiency can be improved. Moreover, the sheet pressing mechanism moves with the pre-pressing device and will not affect subsequent stamping operations. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of this utility model.

[0017] Figure 1 This is a schematic diagram of the fit between the sheet metal and the stamping base in the existing technology; Figure 2 yes Figure 1 Enlarged view of point A in the image; Figure 3 This is a schematic diagram of the pre-compression device for detecting the arrival of bent sheet provided in a preferred embodiment of this utility model; Figure 4 yes Figure 3 A schematic diagram of the pre-compression device from another angle; Figure 5 yes Figure 3 A schematic diagram of the support frame and pressing plate mechanism of the intermediate pre-compression device; Figure 6 yes Figure 3 A schematic diagram of the middle support frame and the pressing plate mechanism in another state; Figure 7 yes Figure 5 A schematic diagram of the medium-pressure sheet mechanism. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] The terms "first" and "second" in this utility model are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as a restriction on the order of events.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] This preferred embodiment of the invention provides a chip processing equipment, including a stamping device, a transfer platform, a robotic arm, and a pre-pressing device 100 for detecting the arrival of bent wafers. Multiple chip cores are encapsulated in a molding compound to form wafers 800. After the wafers 800 are removed from the molding compound, they are placed on the transfer platform. Once the wafers 800 have cooled, the robotic arm moves the pre-pressing device 100 to the transfer platform, picks up the wafers 800, and then moves both the pre-pressing device 100 and the wafers 800 into the stamping device. The stamping device includes a stamping base 900. The pre-pressing device 100 places the wafers 800 on the stamping base 900 for stamping to remove residual resin from the encapsulated wafers.

[0022] like Figure 1 and Figure 2 As shown, a positioning pin 901 is provided on the stamping base 900, and a position detector 12 (not shown) is provided on the pre-pressing device 100. A positioning hole 801 is provided on the sheet material 800. When the sheet material 800 is placed on the stamping base 900, under normal conditions, the positioning pin 901 is aligned with the positioning hole 801, and the positioning pin 901 enters the positioning hole 801. The position detector 12 detects that there is no object above the positioning pin 901, and then the stamping operation begins. If the positioning pin 901 is not aligned with the positioning hole 801, the positioning pin 901 will lift the sheet material 800. The position detector 12 will detect that there is an object above the positioning pin 901, thus triggering an alarm to alert the operator of a malfunction, preventing damage to the chip during stamping and to avoid damaging the stamping device.

[0023] like Figure 3 and Figure 4 As shown, the pre-compression device 100 includes a support frame 1, a gripper mechanism 2, a pressing plate mechanism 3, and a driving component 4. The gripper mechanism 2 is mounted on the support frame 1 and is used to pick up and place the material sheet located below the support frame 1. The pressing plate mechanism 3 is slidably mounted on the support frame 1 and is used to press the material sheet. The driving component 4 is mounted on the support frame 1 and is used to drive the pressing plate mechanism 3 to move vertically up and down.

[0024] The pressing plate mechanism 3 includes a pressing block 31, a guide column 32, and a counterweight 33. The pressing block 31 is located below the support frame 1 and is used to press the plate; the counterweight 33 is located above the support frame 1. The guide column 32 is vertically movably connected to the support frame 1, and its two ends are connected to the pressing block 31 and the counterweight 33 respectively. Through the sliding cooperation between the guide column 32 and the support frame 1, the entire pressing plate mechanism 3 can be moved vertically.

[0025] The driving component 4 is mounted on the support frame 1 and connected to the counterweight 33. It is used to drive the counterweight 33 to move vertically, and then drive the pressure block 31 to move up and down together through the guide column 32.

[0026] When the gripper mechanism 2 picks up the material sheet, such as Figure 5 As shown, the drive unit 4 lifts the counterweight 33, causing the pressure block 31 to move upwards via the guide post 32, thus separating it from the material sheet. This prevents the material sheet from being compressed and falling off the gripper mechanism 2 during the gripping and transfer process. The gripper mechanism 2 and the material sheet can then be moved into the stamping device by the drive of the robotic arm. Figure 6 As shown, when the gripper mechanism 2 lowers the sheet, the drive unit 4 lowers the counterweight block 33, and the pressure block 31 moves downward and comes into contact with the sheet to flatten it.

[0027] If the positioning hole 801 of the sheet material is aligned with the positioning pin 901, the positioning pin 901 will enter the positioning hole 801 under the action of the pressure block 31, and the sheet material can be flattened by the pressure block 31 to avoid the bending deformation of the sheet material from affecting the detection accuracy. After the sheet material pressing mechanism 3 is removed from the stamping device along with the pre-pressing device 100, the stamping device begins the sheet material stamping operation.

[0028] If the positioning hole 801 of the material sheet is not aligned with the positioning pin 901, the positioning pin 901 will not be able to enter the positioning hole 801 under the action of the pressure block 31. The material sheet will be lifted by the positioning pin 901, and the position detector 12 on the pre-compression device 100 will be able to detect the abnormal state of the material sheet and thus trigger an alarm.

[0029] This invention improves detection accuracy and avoids false alarms caused by the bending of the material sheet itself by setting a pressing plate mechanism 3 on the pre-pressing device 100, thereby improving work efficiency; and the pressing plate mechanism 3 moves with the pre-pressing device 100 without affecting the stamping operation.

[0030] like Figure 5 As shown, the driving component 4 includes a driving rod 41, which is vertically movable. When the driving rod 41 moves upward, its top end abuts against the counterweight 33, thereby lifting the counterweight 33 upward and causing the entire pressing plate mechanism 3 to move upward. When the gripper mechanism 2 lowers the plate, as... Figure 6As shown, the drive rod 41 moves downwards until it separates from the counterweight 33, and the pressing plate mechanism 3 moves downwards under its own weight. After the sheet is placed on the stamping base 900, the pressing plate mechanism 3 can apply a force to the sheet using its own weight. By setting an appropriate weight for the pressing plate mechanism 3, the force applied to the sheet can be controlled, avoiding excessive or insufficient force on the sheet.

[0031] In this embodiment, the driving component 4 is a cylinder, and its piston rod forms the driving rod 41. Of course, in other embodiments, the driving rod can also be the lead screw of a ball screw, and vertical movement is achieved through the cooperation of a motor and the ball screw.

[0032] like Figure 7 As shown, both the pressure block 31 and the counterweight block 33 are elongated strips arranged horizontally and are parallel to each other. There are multiple guide posts 32, which are arranged along the length of the pressure block 31. The elongated pressure block 31 can easily flatten the material sheet, and the multiple guide posts 32 can ensure the stability of the vertical movement of the entire material pressing mechanism 3, and ensure that the pressure block 31 remains horizontal during the movement.

[0033] The drive component 4 is located at the middle position along the length of the counterweight block 33 to ensure that the entire pressing plate mechanism 3 is subjected to stable force.

[0034] A linear bearing 11 is installed on the support frame 1, and the guide column 32 passes through the linear bearing 11. The linear bearing 11 can ensure the smooth up and down movement of the pressing plate mechanism 3 and improve the reliability of the equipment.

[0035] A position detector 12 is installed on the top of the support frame 1 to detect the vertical position of the counterweight 33. The position detector 12 can detect the movement status of the pressing plate mechanism 3, ensuring its normal operation. At the same time, the position detector 12 can also detect the position of the counterweight 33 at its lowest point. If the material is lifted by the positioning pin 901, the counterweight 33 will also be lifted. By detecting the position of the counterweight 33 at its lowest point, it is also possible to detect whether the positioning pin 901 has entered the positioning hole 801 and whether the material is placed in the correct position, further improving the accuracy and reliability of the detection.

[0036] The position detector 12 can be one of a through-beam sensor, a laser sensor, a capacitive sensor, and a proximity switch.

[0037] In this embodiment, the support frame 1 is equipped with a position detector 12, which determines whether the positioning pin 901 enters the positioning hole 801 by detecting the position of the counterweight 33. In other embodiments, a detector can also be set on the stamping base to directly detect the sheet material.

[0038] There are two or more pressing sheet mechanisms 3, and their arrangement direction is perpendicular to the length direction of the counterweight 33. Multiple pressing sheet mechanisms 3 further ensure that the sheet is flattened. The position detector 12 can also be a through-beam sensor, with its through-beam direction the same as the arrangement direction of the pressing sheet mechanisms 3. One position detector 12 can simultaneously detect multiple pressing sheet mechanisms; any malfunction in one can be detected, reducing detection costs. The number of driving components 4 can be the same as the number of pressing sheet mechanisms 3, with a one-to-one correspondence. Alternatively, a single driving component 4 can be used to simultaneously drive multiple pressing sheet mechanisms 3 through a linkage mechanism.

[0039] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A pre-compression device for detecting the positioning of bent sheet material, characterized in that, Includes support frame, gripper mechanism, pressure plate mechanism and drive components; The gripper mechanism is mounted on the support frame and is used to pick up and place the sheet material located below the support frame; The pressing plate mechanism is slidably mounted vertically on the support frame, and includes a pressing block, a guide column, and a counterweight. The pressing block is located below the support frame and is used to press the pressing plate. The counterweight is located above the support frame, and the guide column is movably connected to the support frame vertically, with its two ends connected to the pressing block and the counterweight, respectively. The driving component is mounted on the support frame and connected to the counterweight, and is used to drive the counterweight to move vertically, thereby driving the pressure block to move up and down together through the guide column; When the gripper mechanism picks up the sheet, the drive member lifts the counterweight so that the pressure block moves upward and separates from the sheet; when the gripper mechanism lowers the sheet, the drive member lowers the counterweight, the pressure block moves downward and abuts against the sheet so as to flatten the position on the sheet corresponding to the pressure block.

2. The pre-compression device for detecting the arrival of bent sheet material according to claim 1, characterized in that, The driving component includes a driving rod, which is vertically movable. When the driving rod moves upward, its top end abuts against the counterweight, thereby lifting the counterweight upward and causing the entire pressing plate mechanism to move upward. When the gripper mechanism lowers the plate, the driving rod moves downward until it separates from the counterweight, and the pressing plate mechanism moves downward under its own weight.

3. The pre-compression device for detecting the arrival of bent sheet material according to claim 2, characterized in that, The driving component is a cylinder, and its piston rod forms the driving rod.

4. The pre-compression device for detecting the arrival of bent sheet material according to claim 1, characterized in that, Both the pressure block and the counterweight are elongated strips arranged horizontally and are parallel to each other; there are multiple guide posts arranged along the length of the pressure block.

5. The pre-compression device for detecting the arrival of bent sheet material according to claim 4, characterized in that, The driving component is located at the middle position along the length of the counterweight.

6. The pre-compression device for detecting the arrival of bent sheet material according to claim 4, characterized in that, A position detector is installed at the top of the support frame to detect the vertical position of the counterweight.

7. The pre-compression device for detecting the arrival of bent sheet material according to claim 6, characterized in that, The position detector is one of a through-beam sensor, a laser sensor, a capacitive sensor, and a proximity switch.

8. The pre-compression device for detecting the arrival of bent sheet material according to claim 4, characterized in that, There are two or more pressing plate mechanisms, and their arrangement direction is perpendicular to the length direction of the counterweight.

9. The pre-compression device for detecting the arrival of bent sheet material according to claim 1, characterized in that, The support frame is equipped with a linear bearing, and the guide column passes through the linear bearing.

10. A chip processing device, characterized in that, The invention includes a stamping device, a robotic arm, and a pre-pressing device for detecting the arrival of a bent sheet as described in any one of claims 1 to 9. The stamping device includes a stamping base, and the robotic arm is connected to a support frame of the pre-pressing device for driving the pre-pressing device in and out of the stamping device, thereby placing the sheet on the stamping base.

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