A wire bonding machine loading and unloading device

Abstract

The present invention discloses a wire bonding machine loading and unloading equipment, which relates to the technical field of loading and unloading equipment. It includes a loading shell, the loading shell is provided with a feeding door, a material basket is slidably connected to a position in the loading shell near the feeding door, a first electric slide rail is installed in the loading shell, a slider on the first electric slide rail is fixedly connected to an electric shaft, the electric shaft is fixedly connected to a second electric slide rail, the slider on the second electric slide rail is fixedly connected to an L-shaped frame, the L-shaped frame is fixedly connected to a piston rod, the upper side of the piston rod is sealingly slidably connected to a mounting frame, and the mounting frame is fixedly connected to symmetrical and equidistant suction cups. The present invention uses the suction cup to adsorb the flexible circuit board, and at the same time, supports the lower side of the flexible circuit board through the L-shaped frame, so that the flexible circuit board tends to be straight, thereby reducing the bending degree of the flexible circuit board during movement, thereby preventing the chip on the flexible circuit board from being misaligned.

Description

Technical Field

[0001] The present invention relates to the technical field of loading and unloading equipment, and in particular to a loading and unloading equipment for a wire bonding machine. Background Art

[0002] A wire bonding machine is a device that connects chips to circuit boards. Before the wire bonding work, the chip to be connected needs to be adhered to the circuit board, and then the circuit board with the chip is placed on the working plane of the wire bonding machine. A mechanical arm with a suction cup is usually used to move the circuit board to the working plane of the wire bonding machine. In the process of using the suction cup to adsorb and fix the circuit board, in order to prevent the suction cup from affecting the position of the chip adhered to the circuit board, the suction cup will adsorb and fix the symmetrical positions on the circuit board where there is no chip. However, when moving the flexible circuit board, due to the flexibility of the suction cup itself, after the suction cup adsorbs and fixes the flexible circuit board, the middle part of the flexible circuit board will still bend downward due to its own gravity, and the chip on the flexible circuit board is simply adhered to the flexible circuit board before wire bonding. If the flexible circuit board is greatly bent, the chip position on the flexible circuit board will deviate, affecting the subsequent wire bonding and causing the finished product to be scrapped. Summary of the invention

[0003] The invention provides a loading and unloading device for a wire bonding machine, so as to overcome the disadvantage that when the flexible circuit board is moved by a suction cup in the prior art, the flexible circuit board has a large bending degree.

[0004] The technical solution is: a loading and unloading device for a wire bonding machine, comprising a loading shell, the loading shell is provided with a feeding door, a material basket is slidably connected with a position limit in the loading shell near the feeding door, a first electric slide rail is installed in the loading shell, a slider on the first electric slide rail is fixedly connected with an electric rotating shaft, the electric rotating shaft is fixedly connected with a second electric slide rail, the slider on the second electric slide rail is fixedly connected with an L-shaped frame, a mobile air pump is installed on the L-shaped frame, a piston rod is fixedly connected to a position of the L-shaped frame near the mobile air pump, a mounting frame is sealingly and slidably connected to the upper side of the piston rod, the piston rod and the mounting frame are frictionally matched, the mounting frame and the mobile air pump are connected through a telescopic tube, the mounting frame is fixedly connected with symmetrical and equidistant suction cups, the suction cups are connected with a connecting pipe, the mounting frame is fixedly connected and connected with a main ventilation pipe on one side close to the mobile air pump, the connecting pipe is connected with the main ventilation pipe, a third electric slide rail is installed in the loading shell at a position away from the feeding door, and a feed block is fixedly connected to the slider on the third electric slide rail.

[0005] Furthermore, a sliding member is connected to the upper side of the feed block in a limited sliding manner, a spring is fixedly connected between the sliding member and the feed block, the feed block is provided with a groove, the sliding member is located in the groove, and the sliding member is extruded and matched with the L-shaped frame.

[0006] Furthermore, a sealing ring is slidably connected to the upper seal in the suction cup, an extrusion piece is fixedly connected to the lower side of the sealing ring, a spring is fixedly connected between the sealing ring and the adjacent suction cup, a sealing block is fixedly connected to the lower side of the sealing ring near the adjacent connecting pipe, and the sealing block cooperates with the adjacent connecting pipe for sealing.

[0007] Furthermore, a negative pressure cylinder is fixedly connected in the suction cup, a negative pressure piston is sealingly and slidably connected in the negative pressure cylinder, the negative pressure piston cooperates with the adjacent negative pressure cylinder to form a negative pressure chamber, the negative pressure chamber is under negative pressure, the suction cup is splined with a sealing member sealingly and slidably connected to the adjacent negative pressure cylinder, the sealing member is fixedly connected to the adjacent negative pressure piston, the sealing member cooperates with the adjacent sealing block to limit the position, and the sealing member cooperates with the adjacent connecting pipe to seal.

[0008] Furthermore, an extrusion slope is provided on one side of the blocking block close to the adjacent blocking piece, and the extrusion slope is extrusion-matched with the adjacent blocking piece.

[0009] Furthermore, an arc-shaped piece is fixedly connected to the lower side of the sealing ring near the adjacent negative pressure cylinder and is sealingly and slidingly connected to the adjacent suction cup. The suction cup is provided with an arc-shaped through hole. The sealing ring and the adjacent arc-shaped piece cooperate with the adjacent arc-shaped through hole to seal, and the sealing ring is provided with a flat pressure hole.

[0010] Furthermore, in the vertical direction, the height of the arc-shaped through hole is smaller than the vertical height of the contact portion between the blocking block and the adjacent blocking piece.

[0011] Furthermore, the inner diameter of the connecting pipe is smaller than the inner diameter of the main ventilation pipe, and the sum of the connecting areas of the symmetrical and equidistant connecting pipes is smaller than the connecting area between the mobile air pump and the mounting frame.

[0012] Furthermore, it also includes a symmetrically distributed fourth electric slide rail, which is installed in the feed block, and the fourth electric slide rail is provided with symmetrically distributed sliders, and the sliders on the fourth electric slide rail are all fixedly connected with detection blocks, the upper side of the detection block is sealed and limitedly slidably connected with a limiting member, and a spring is fixedly connected between the limiting member and the adjacent detection block.

[0013] Furthermore, a fixed air pump is installed in the feed block, and deep holes are provided on the opposite sides of the detection block symmetrically distributed on the same fourth electric slide rail. The deep holes are connected to the fixed air pump through a conduit, and the detection block cooperates with the adjacent limit member to form a fixed cavity, and the fixed cavity is connected to the adjacent deep hole.

[0014] The present invention includes at least the following beneficial effects: while using the suction cup to adsorb the flexible circuit board, the present invention supports the lower side of the flexible circuit board through the L-shaped frame, so that the flexible circuit board tends to be straight, thereby reducing the bending degree of the flexible circuit board during movement, and preventing the chip on the flexible circuit board from being misaligned; the extrusion piece contacts the circuit board and moves into the adjacent suction cup, connecting the suction cup with the main ventilation pipe, to prevent the suction force of the suction cup on the circuit board from being small due to the different specifications of the circuit boards to be transported; by blocking the deep hole with the flexible circuit board, it is judged whether the circuit board has been moved into place, and then the flexible circuit board is clamped and fixed by the limit piece, the positioning and fixing are combined together, the operation process is simplified, and the production cost is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the internal structure of the feeding shell of the present invention;

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the electric shaft, the second electric slide rail and the L-shaped frame of the present invention;

[0018] Figure 4 It is a three-dimensional structural schematic diagram of the mounting frame, suction cup and main ventilation pipe of the present invention;

[0019] Figure 5 It is a three-dimensional structural schematic diagram of the feed block and the sliding member of the present invention;

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of the sealing ring, the extrusion piece and the blocking block of the present invention;

[0021] Figure 7 It is a three-dimensional structural schematic diagram of the negative pressure cylinder, the negative pressure piston and the blocking member of the present invention;

[0022] Figure 8 It is a schematic diagram of the three-dimensional structure of the feeding block, the fourth electric slide rail and the detection block of the present invention;

[0023] Fig. 9 It is a schematic diagram of the three-dimensional structure of the detection block, the limiter and the fixed air pump of the present invention.

[0024] The names and serial numbers of the parts in the figure are: 1-feeding shell, 2-feeding door, 3-material basket, 4-first electric slide rail, 5-electric rotating shaft, 6-second electric slide rail, 7-L-shaped frame, 8-mobile air pump, 9-piston rod, 10-mounting frame, 11-suction cup, 111-connecting pipe, 12-main ventilation pipe, 13-third electric slide rail, 14-feeding block, 141-sliding part, 142-groove, 15-sealing ring, 16-extrusion part, 17-blocking block, 171-extrusion slope, 18-negative pressure cylinder, 19-negative pressure piston, 191-negative pressure chamber, 20-blocking part, 21-arc part, 211-arc through hole, 212-flat pressure hole, 22-fourth electric slide rail, 23-detection block, 24-limiting part, 25-fixed air pump, 251-deep hole, 252-fixed chamber. DETAILED DESCRIPTION

[0025] The following will be combined with the attached Figure 1 To Attachment Fig. 9 The present invention is described in detail, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] When loading the wire bonding machine, a robotic arm with a suction cup is usually used to move the flexible circuit board to the working plane of the wire bonding machine. During the process of adsorbing and fixing the flexible circuit board, in order to prevent the suction cup from affecting the chip adhered to the flexible circuit board, the suction cup is usually made to contact and adsorb the two sides of the flexible circuit board that are symmetrical and without chips. However, due to the flexibility of the suction cup itself, after the suction cup adsorbs and fixes the flexible circuit board, the middle part of the flexible circuit board will still bend downward due to its own gravity, and the chip on the flexible circuit board is simply adhered to the flexible circuit board before bonding. If the flexible circuit board is greatly bent, the chip position on the flexible circuit board will deviate, affecting the subsequent bonding.

[0027] Example 1: A wire bonding machine loading and unloading device, please refer to Figure 1-Figure 4, including a feeding shell 1, on which a control terminal is installed (this is an existing device, not shown in the figure), a feeding door 2 is arranged on the upper part of the right side of the feeding shell 1, and a material basket 3 is slidably connected to the right side of the feeding shell 1, and five layers of supporting plates with equal distance from top to bottom are arranged in the material basket 3, each layer of the supporting plate is composed of two plates symmetrically distributed front and back, and the gap between the two plates on the same layer is small, and the front and rear parts of the flexible circuit board are respectively built on two adjacent plates, and the middle part of the flexible circuit board is floating but not bent downward, and a first electric slide rail 4 electrically connected to the control terminal is installed in the feeding shell 1, and the slider on the first electric slide rail 4 is fixedly connected to an electric rotating shaft 5, and the lower side of the electric rotating shaft 5 is fixedly connected to a second electric slide rail 6, and the second electric slide rail 6 is an inverted L-shaped, and an L-shaped frame 7 is fixedly connected to the right side of the slider on the second electric slide rail 6, and the L-shaped frame 7 includes a horizontal part and a vertical part, and the upper part of the right side of the vertical part of the L-shaped frame 7 is arranged A mobile air pump 8 electrically connected to the control terminal is installed, a piston rod 9 is fixedly connected to the left part of the upper side of the horizontal part of the L-shaped frame 7, and a mounting frame 10 is sealed and slidably connected to the upper and lower sides of the piston rod 9. The piston rod 9 and the mounting frame 10 are frictionally matched, and the friction force between the two is greater than the gravity of all parts on the mounting frame 10. The upper side of the mounting frame 10 is connected to the mobile air pump 8 through a telescopic tube, and the right part of the mounting frame 10 is fixedly connected to a plurality of suction cups 11 that are symmetrical and equidistant from front to back. The lower part of the suction cup 11 is a flexible part, which is used to fit and seal with the flexible circuit board. The suction cup 11 is connected to a connecting pipe 111, and the upper side of the mounting frame 10 is fixedly connected and connected to a main ventilation pipe 12, and the connecting pipe 111 is connected to the main ventilation pipe 12. A third electric slide rail 13 electrically connected to the control terminal is installed on the left part of the feeding shell 1, and the slider on the third electric slide rail 13 is fixedly connected to a feed block 14, which is used to transport the flexible circuit board to the working plane of the wire bonding machine.

[0028] Please refer to Figure 5 The upper side of the feed block 14 is limited and connected to a sliding member 141 for sliding up and down movement. A spring is fixedly connected between the lower side of the sliding member 141 and the feed block 14. Initially, the upper side of the sliding member 141 is coplanar with the upper side of the feed block 14. The feed block 14 is provided with a groove 142. The sliding member 141 is located in the groove 142. The sliding member 141 is squeezed and matched with the L-shaped frame 7 to place the flexible circuit board on the feed block 14.

[0029] Please refer to Figure 6 A sealing ring 15 is sealed on the upper part of the suction cup 11 and is slidably connected up and down. An extrusion piece 16 is fixedly connected to the lower side of the sealing ring 15. A spring is fixedly connected between the upper side of the sealing ring 15 and the adjacent suction cup 11. A blocking block 17 is fixedly connected to the lower side of the sealing ring 15 near the adjacent connecting pipe 111. The blocking block 17 cooperates with the adjacent connecting pipe 111 in a sealing manner.

[0030] Please refer to Figure 6 and Figure 7A negative pressure cylinder 18 is fixedly connected in the suction cup 11. The negative pressure cylinder 18 is a cylinder with an opening on one side. A negative pressure piston 19 is sealed in the negative pressure cylinder 18 and is slidably connected to it front and back. The side of the negative pressure piston 19 close to the adjacent connecting tube 111 cooperates with the adjacent negative pressure cylinder 18 to form a negative pressure chamber 191. The negative pressure chamber 191 is under negative pressure. A blocking piece 20 is splinedly connected to the suction cup 11. The blocking piece 20 is sealingly and slidably connected to the adjacent negative pressure cylinder 18. The blocking piece 20 is fixedly connected to the adjacent negative pressure piston 19. The blocking piece 20 is limitedly matched with the adjacent blocking block 17. The blocking piece 20 is sealed and matched with the adjacent connecting tube 111, and is used to block the adjacent connecting tube 111 when the flexible portion of the adjacent suction cup 11 is not completely sealed with the circuit board, so as to prevent affecting the pressure in the other suction cups 11.

[0031] Please refer to Figure 7 A side of the blocking block 17 close to the adjacent blocking piece 20 is provided with an extrusion slope 171 , and the extrusion slope 171 is extruded and matched with the adjacent blocking piece 20 to extrude and guide the adjacent blocking piece 20 to reset.

[0032] Please refer to Figure 6 and Figure 7 The lower side of the sealing ring 15 is fixed with an arc-shaped member 21 near the adjacent negative pressure cylinder 18. The arc-shaped member 21 is sealed and slidably connected with the adjacent suction cup 11. The upper part of the suction cup 11 is provided with an arc-shaped through hole 211. In the vertical direction, the arc-shaped through hole 211 is located above the adjacent connecting pipe 111, and the height of the arc-shaped through hole 211 is less than the vertical height of the contact part between the blocking block 17 and the adjacent blocking member 20, which is used to judge whether the suction cup 11 and the flexible circuit board are completely sealed. The sealing ring 15 and the adjacent arc-shaped through hole 211 are provided with an arc-shaped through hole 211. The parts 21 are sealed together with the adjacent arc-shaped through holes 211. A flat pressure hole 212 is provided in the middle of the sealing ring 15. The inner diameter of the connecting tube 111 is smaller than the inner diameter of the main ventilation tube 12. It is used to keep the negative pressure in the remaining suction cups 11 when one of the suction cups 11 is not completely sealed with the circuit board. The sum of the connecting areas of the several connecting tubes 111 is smaller than the connecting area between the mobile air pump 8 and the mounting frame 10. It is used to increase the pressure in the mounting frame 10 and the suction cup 11 at the same time when the mobile air pump 8 pumps air outward.

[0033] Before loading the wire bonding machine with the loading and unloading equipment, the worker places the flexible circuit board with the chip on the supporting plate of the material basket 3 from bottom to top in sequence, until the supporting plates of the material basket 3 are all filled with flexible circuit boards, the worker places the material basket 3 into the loading shell 1 through the feeding door 2, and then the worker starts the control terminal of the loading shell 1, and the control terminal starts the second electric slide rail 6 and the first electric slide rail 4 in sequence, and the slider on the second electric slide rail 6 drives the L-shaped frame 7 and the parts thereon to move up and down until the upper side of the horizontal part of the L-shaped frame 7 is lower than the uppermost part of the material basket 3. When the upper loading plate is reached, the second electric slide rail 6 is stopped, and then the slider on the first electric slide rail 4 drives the L-shaped frame 7 to move right through the electric rotating shaft 5 and the second electric slide rail 6, so that the horizontal part of the L-shaped frame 7 completely enters the material basket 3 (at this time, the right side of the horizontal part of the L-shaped frame 7 contacts the left side in the material basket 3), at this time, the first electric slide rail 4 is stopped, and the second electric slide rail 6 is started again, and the slider on the second electric slide rail 6 drives the L-shaped frame 7 to move upward, so that the upper side of the horizontal part of the L-shaped frame 7 is coplanar with the upper side of the uppermost loading plate of the material basket 3, and then the second electric slide rail 6 is stopped.

[0034] When the L-shaped frame 7 moves upward and finally makes the upper side of the horizontal part of the L-shaped frame 7 coplanar with the upper side of the uppermost supporting plate of the basket 3, the control terminal starts the mobile air pump 8, and the mobile air pump 8 extracts the gas in the mounting frame 10, and the air pressure in the mounting frame 10 decreases. Under the action of the air pressure, the mounting frame 10 overcomes the friction between it and the piston rod 9 and moves downward slowly, and the mounting frame 10 drives a number of suction cups 11 to move downward, and the flexible part of the suction cup 11 gradually approaches the flexible circuit board and finally contacts it, so that the flexible part of the suction cup 11 gradually deforms, and then the extrusion piece 16 contacts the flexible circuit board and stops moving. The disk 11 continues to move downward, and the suction cup 11 moves downward relative to the adjacent blocking block 17 and the adjacent sealing ring 15. During this process, the spring adjacent to the sealing ring 15 is compressed, and the blocking block 17 gradually releases the obstruction of the adjacent connecting pipe 111, so that the connecting area of ​​the connecting pipe 111 gradually increases. At this time, the mobile air pump 8 extracts the gas between the adjacent suction cup 11 and the flexible circuit board (this part of the space will be referred to as the adsorption chamber later) through the mounting frame 10, the main ventilation pipe 12 and the connecting pipe 111, and at the same time, the external gas enters the adsorption chamber through the arc through hole 211 and the adjacent flat pressure hole 212.

[0035] When the sealing block 17 gradually releases the blockage of the adjacent connecting pipe 111, the sealing ring 15 and the adjacent arc-shaped member 21 gradually block the adjacent arc-shaped through hole 211. When the sealing ring 15 and the adjacent arc-shaped member 21 finally completely block the adjacent arc-shaped through hole 211, as the gas in the adsorption chamber is extracted, the air pressure in the adsorption chamber gradually decreases, and finally the air pressure in the adsorption chamber is lower than the air pressure in the negative pressure chamber 191 (previously, due to the pressure difference between the negative pressure chamber 191 and the adjacent adsorption chamber, the negative pressure piston 19 tends to approach the central axis of the adjacent suction cup 11). At this time, the negative pressure piston 19 tends to move away from the central axis of the adjacent suction cup 11. As the suction cup 11 continues to move downward, until the sealing block 17 completely releases the blockage of the adjacent connecting pipe 111, the sealing block 17 loses contact with the adjacent sealing member 20.

[0036] After the blocking block 17 loses contact with the adjacent blocking piece 20, the lower side of the mounting frame 10 contacts the upper side of the horizontal portion of the L-shaped frame 7 and stops moving, and then the air pump 8 is moved to keep the mounting frame 10 and the air pressure in the adsorption chamber unchanged. At this time, the fixation of the flexible circuit board is completed, and then the control terminal starts the first electric slide rail 4, and the slider of the first electric slide rail 4 drives the electric shaft 5 and all the parts thereon to move left until the electric shaft 5 moves to between the material basket 3 and the feed block 14, then the first electric slide rail 4 is paused, and the electric shaft 5 is started, and the electric shaft 5 drives the second electric slide rail 6 and the parts thereon to rotate 180° and then stop, and then the second electric slide rail 6 and the first electric slide rail are started in sequence. Rail 4, the slider on the second electric slide rail 6 drives the L-shaped frame 7 to move up and down, so that the L-shaped frame 7 is located above the feed block 14, at this time, the second electric slide rail 6 is stopped, and then the slider on the first electric slide rail 4 drives the electric rotating shaft 5 to move left, until the L-shaped frame 7 drives the flexible circuit board to move to just above the feed block 14, the first electric slide rail 4 is stopped and the second electric slide rail 6 is started again, the slider on the second electric slide rail 6 drives the L-shaped frame 7 to move downward, the L-shaped frame 7 contacts with the sliding member 141, and squeezes the sliding member 141 to move downward, compresses the spring adjacent to the sliding member 141, until the upper side of the horizontal part of the L-shaped frame 7 is coplanar with the upper side of the feed block 14, and then the second electric slide rail 6 is stopped.

[0037] When the upper side of the horizontal portion of the L-shaped frame 7 is coplanar with the upper side of the feed block 14, the flexible circuit board is laid flat on the upper side of the feed block 14. At this time, the control terminal controls the mobile air pump 8 to blow air into the mounting frame 10, so that the pressure in the mounting frame 10 and the plurality of adsorption chambers increases. The air pressure in the mounting frame 10 gradually overcomes the friction between the mounting frame 10 and the piston rod 9, and the mounting frame 10 drives the plurality of suction cups 11 to move slowly upward. At the same time, the pressure in the adsorption chamber increases, so that the negative pressure piston 19 drives the adjacent blocking member 20 (attached in this paragraph). Figure 615 and 16 are reset relative to the adjacent suction cup 11. The sealing block 17 drives the adjacent extrusion slope 171 to contact the adjacent sealing piece 20. The extrusion slope 171 squeezes the adjacent sealing piece 20 to the right and resets it. Subsequently, the sealing ring 15 and the adjacent arc-shaped piece 21 release the blockage of the adjacent arc-shaped through hole 211, so that the air pressure in the adsorption chamber is the same as the external air pressure. The sealing block 17 re-blocks the adjacent connecting pipe 111, and the sealing ring 15 and the adjacent extrusion piece 16 are reset relative to the adjacent suction cup 11. The mounting frame 10 drives the plurality of suction cups 11 to reset relative to the L-shaped frame 7.

[0038] When the mounting frame 10 is reset relative to the L-shaped frame 7, the moving air pump 8 is stopped and the first electric slide rail 4 is started. The slider on the first electric slide rail 4 drives the electric rotating shaft 5 and all parts thereon to move right. The L-shaped frame 7 gradually loses contact with the feed block 14 and the flexible circuit board. Then the sliding member 141 slowly moves upward under the action of its adjacent spring, and finally the upper side of the sliding member 141 is coplanar with the upper side of the feed block 14. At this time, the transportation of the flexible circuit board is completed, and the control terminal starts the third electric slide rail 13. The slider of the third electric slide rail 13 drives the feed block 14 and the flexible circuit board thereon to move backward to the working position of the wire bonding machine, and performs wire bonding operation on the flexible circuit board. After the wire bonding operation is completed, the control terminal controls the slider on the third electric slide rail 13 to drive the feed block 14 to move backward to the unloading device, and removes the flexible circuit board that has completed wire bonding through the unloading device. Then the slider on the third electric slide rail 13 drives the feed block 14 to move forward and reset.

[0039] After the L-shaped frame 7 loses contact with the feed block 14, the slider on the first electric slide rail 4 continues to drive the electric shaft 5 to move right and reset. After the electric shaft 5 is reset, the control terminal starts the electric shaft 5, and the electric shaft 5 drives all parts thereon to rotate 180° and then reset. Then the above operations are repeated to move the flexible circuit boards on the remaining supporting plates on the basket 3 from top to bottom.

[0040] When the material basket 3 is used to carry circuit boards of different specifications (different specifications refer to the same length in the front-to-back direction, but different length in the left-to-right direction), when the suction cup 11 moves down, the flexible portion of some suction cups 11 will be located at the edge of the flexible circuit board, that is, the flexible circuit board and the material basket 3 are in contact with the flexible portion of the suction cup 11, which makes it impossible for the suction cup 11 to be completely sealed. Since several suction cups 11 are connected through the main ventilation pipe 12, if one of the suction cups 11 cannot be sealed, the adsorption force of the remaining suction cups 11 on the circuit board will be small. The solution is as follows: In the above process, when sealing After the ring 15 and the adjacent arc-shaped piece 21 block the adjacent arc-shaped through hole 211, the air pressure in the adsorption chamber is lower than the air pressure in the negative pressure chamber 191. However, if the suction cup 11 is not completely sealed with the flexible circuit board, the air pressure in the adsorption chamber will be higher than the air pressure in the negative pressure chamber 191. After the subsequent blocking block 17 loses contact with the adjacent blocking piece 20, the blocking piece 20 moves under the drive of the adjacent negative pressure piston 19 and blocks the adjacent connecting pipe 111. This prevents one suction cup 11 from being completely sealed with the flexible circuit board, resulting in the remaining suction cups 11 having a weak adsorption force on the flexible circuit board.

[0041] After the blocking piece 20 blocks the adjacent connecting pipe 111, when the flexible circuit board is placed on the feed block 14, the gas enters the adjacent adsorption chamber through the connecting pipe 111. During this process, the gas ejected from the connecting pipe 111 blows the adjacent blocking piece 20 to move (at this time, the blocking piece 20 is equivalent to a one-way valve), and then the steps of the above process are repeated, that is, the extrusion ramp 171 squeezes the adjacent blocking piece 20, and finally all parts in the suction cup 11 are reset.

[0042] When using the suction cup 11 to absorb circuit boards of different specifications, the suction cup 11 may fit with the supporting plate of the basket 3 and be absorbed on the supporting plate of the basket 3. If the suction cup 11 is directly pulled out of the basket 3, the mounting frame 10 will vibrate, affecting the stability of the chip on the flexible circuit board. The solution is as follows: when the suction cup 11 is moved upward, the distance between the suction cup 11 and the basket 3 increases, so that the flexible part of the suction cup 11 is stretched, and the extrusion piece 16 and the adjacent sealing ring 15 remain stationary relative to the basket 3 under the action of the adjacent springs, that is, the suction cup 11 moves upward relative to the adjacent sealing ring 15 until When the sealing ring 15 and the adjacent arc-shaped member 21 release the blockage of the adjacent equalizing hole 212, the air pressure in the adsorption chamber is the same as the external air pressure, and then the above-mentioned step of moving the sealing ring 15 downward relative to the adjacent suction cup 11 is repeated to make the blocking block 17 block the adjacent connecting pipe 111. In this way, when the suction cup 11 is adsorbed on the material basket 3, the sealing ring 15 moves downward relative to the adjacent suction cup 11, so that the space between the suction cup 11 and the flexible circuit board is connected to the outside world, thereby gradually reducing the adsorption force of the suction cup 11 on the material basket 3, preventing the suction cup 11 from being directly pulled off the material basket 3, causing the mounting frame 10 and the flexible circuit board to vibrate.

[0043] If this device (expressed as an automatic unloading device) transports the processed circuit board, the L-shaped frame 7 should first squeeze the sliding member 141 downward to make the middle part of the flexible circuit board float, and then the L-shaped frame 7 moves to the bottom of the flexible circuit board and fixes it to the flexible circuit board with the suction cup 11. Through the cooperation of the first electric slide rail 4, the electric rotating shaft 5 and the second electric slide rail 6, the L-shaped frame 7 moves to the top of the lowermost supporting plate of the material basket 3 and then moves downward to place the flexible circuit board on the material basket 3.

[0044] When placing a circuit board on the working plane of a wire bonding machine, the circuit board needs to be limited, but the existing limiting structure is usually directly fixed on the working plane of the wire bonding machine, resulting in the need to remove the original limiting structure when circuit boards of different specifications need to be bonded, and then the corresponding limiting structure needs to be installed on the working plane of the wire bonding machine. However, this method increases the number of operating steps, resulting in low work efficiency.

[0045] Example 2: Based on Example 1, please refer to Figure 8 and Fig. 9 , also includes two fourth electric slide rails 22 symmetrically distributed front and back, the fourth electric slide rails 22 are electrically connected to the control terminal, the fourth electric slide rails 22 are installed in the feed block 14, and two sliders symmetrically distributed left and right are provided on the fourth electric slide rail 22. The upper sides of the sliders on the fourth electric slide rail 22 are fixedly connected with detection blocks 23, the upper sides of the detection blocks 23 are coplanar with the upper sides of the feed block 14, the upper side of the detection block 23 is limited and connected to the limit member 24 by sliding up and down, the detection block 23 is sealed with the adjacent limit member 24, and a spring is fixedly connected between the lower side of the limit member 24 and the adjacent detection block 23.

[0046] Please refer to Fig. 9 A fixed air pump 25 electrically connected to the control terminal is installed in the feed block 14. Deep holes 251 are provided on the opposite sides of the two detection blocks 23 symmetrically distributed on the same fourth electric slide rail 22. The deep holes 251 are connected to the fixed air pump 25 through a conduit. The lower side of the detection block 23 cooperates with the adjacent limit member 24 to form a fixed cavity 252. The limit member 24 is an inverted L-shape, which is used to cooperate with the adjacent detection block 23 to clamp and fix the flexible circuit board. The fixed cavity 252 is connected to the adjacent deep hole 251.

[0047] After the L-shaped frame 7 places the flexible circuit board on the feed block 14, the control terminal starts the two fourth electric slide rails 22 and the fixed air pump 25, and the two sliders on the fourth electric slide rail 22 move closer to each other, and the slider on the fourth electric slide rail 22 drives the adjacent detection block 23 to move, so that the distance between the two detection blocks 23 symmetrically distributed on the left and right gradually decreases, and the detection block 23 drives the adjacent limit member 24 to move, so that the limit member 24 gradually contacts the side of the flexible circuit board. As the fixed air pump 25 is started, the fixed air pump 25 sucks the outside air through the four deep holes 251. When the limit member 24 contacts the flexible circuit board, the flexible circuit board blocks the adjacent deep holes 251, so that the area of ​​the fixed air pump 25 sucking the outside air is reduced, until the four deep holes 251 are blocked by the flexible circuit board. At this time, the air pressure in the fixed air pump 25 and the deep hole 251 is reduced, and the fixed air pump 25 transmits a signal to the control terminal, and the control terminal stops the two fourth electric slide rails 22.

[0048] As the air pressure in the deep hole 251 decreases, the deep hole 251 draws out the gas in the adjacent fixed cavity 252 and eventually overcomes the spring adjacent to the limit member 24, pulling the limit member 24 downward so that the upper part of the limit member 24 contacts the upper side of the flexible circuit board and fixes the flexible circuit board. Subsequently, the fixed air pump 25 is controlled to keep the air pressure inside it unchanged, and the flexible circuit board is bonded by the wire bonding machine.

[0049] After the wire bonding is completed, the control terminal starts the fixed air pump 25 and the two fourth electric slide rails 22 in sequence. The fixed air pump 25 transports the external gas to the deep hole 251 through the conduit, so that the air pressure in the deep hole 251 and the adjacent fixed cavity 252 increases, and the limiter 24 moves up under the action of the adjacent spring and releases the fixation of the flexible circuit board. Then the sliders on the fourth electric slide rail 22 move away from each other, so that the detection block 23 drives the adjacent limiter 24 to move, and the limiter 24 loses contact with the flexible circuit board. At this time, the flexible circuit board is removed from the feed block 14 through the cooperation of the L-shaped frame 7 and the suction cup 11.

[0050] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A loading and unloading device for a wire bonding machine, comprising a loading housing, the loading housing is provided with a feeding door, a material basket is slidably connected to a position in the loading housing near the feeding door, a first electric slide rail is installed in the loading housing, a slider on the first electric slide rail is fixedly connected to an electric shaft, and the electric shaft is fixedly connected to a second electric slide rail, characterized in that: It also includes an L-shaped frame, the L-shaped frame is fixedly connected to the slider of the second electric slide rail, the L-shaped frame is equipped with a mobile air pump, the L-shaped frame is fixedly connected to a piston rod at a position close to the mobile air pump, the upper side of the piston rod is sealingly and slidably connected to a mounting frame, the piston rod and the mounting frame are frictionally matched, the mounting frame and the mobile air pump are connected through a telescopic tube, the mounting frame is fixedly connected to symmetrical and equidistant suction cups, the suction cups are connected to a connecting pipe, the side of the mounting frame close to the mobile air pump is fixedly connected and connected to a main ventilation pipe, the connecting pipe is connected to the main ventilation pipe, a third electric slide rail is installed in the loading shell at a position away from the feeding door, and the slider on the third electric slide rail is fixedly connected to a feeding block; The upper sealing slidably connected to the suction cup is a sealing ring, the lower side of the sealing ring is fixedly connected to an extrusion piece, a spring is fixedly connected between the sealing ring and the adjacent suction cup, a blocking block is fixedly connected to the lower side of the sealing ring near the adjacent connecting pipe, and the blocking block is matched with the adjacent connecting pipe for sealing; A negative pressure cylinder is fixedly connected in the suction cup, a negative pressure piston is sealingly and slidably connected in the negative pressure cylinder, the negative pressure piston cooperates with the adjacent negative pressure cylinder to form a negative pressure chamber, the negative pressure chamber is under negative pressure, the suction cup is splined with a plugging piece sealingly and slidably connected with the adjacent negative pressure cylinder, the plugging piece is fixedly connected to the adjacent negative pressure piston, the plugging piece cooperates with the adjacent blocking block in a limiting manner, and the plugging piece cooperates with the adjacent connecting pipe in a blocking manner; A side of the blocking block close to the adjacent blocking piece is provided with an extrusion slope, and the extrusion slope is extrusion-matched with the adjacent blocking piece.

2. The loading and unloading equipment of a wire bonding machine according to claim 1, characterized in that: The upper side of the feed block is limitedly slidably connected with a sliding member, a spring is fixedly connected between the sliding member and the feed block, the feed block is provided with a groove, the sliding member is located in the groove, and the sliding member is extrusion-fitted with the L-shaped frame.

3. The loading and unloading equipment of a wire bonding machine according to claim 1 is characterized in that: An arc-shaped piece is fixedly connected to the lower side of the sealing ring near the adjacent negative pressure cylinder and is sealingly and slidingly connected to the adjacent suction cup. The suction cup is provided with an arc-shaped through hole. The sealing ring and the adjacent arc-shaped piece cooperate with the adjacent arc-shaped through hole to seal. The sealing ring is provided with a flat pressure hole.

4. The loading and unloading equipment of a wire bonding machine according to claim 3 is characterized in that: In the vertical direction, the height of the arc-shaped through hole is smaller than the vertical height of the contact portion between the blocking block and the adjacent blocking piece.

5. The loading and unloading equipment of a wire bonding machine according to claim 1, characterized in that: The inner diameter of the connecting pipe is smaller than the inner diameter of the main ventilation pipe, and the sum of the connecting areas of the symmetrical and equidistant connecting pipes is smaller than the connecting area between the mobile air pump and the mounting frame.

6. The loading and unloading equipment of a wire bonding machine according to claim 2, characterized in that: It also includes a symmetrically distributed fourth electric slide rail, which is installed in the feed block. The fourth electric slide rail is provided with symmetrically distributed sliders. The sliders on the fourth electric slide rail are all fixedly connected with detection blocks. The upper side of the detection block is sealed and limitedly slidably connected with a limiting piece, and a spring is fixedly connected between the limiting piece and the adjacent detection block.

7. The loading and unloading equipment of a wire bonding machine according to claim 6, characterized in that: A fixed air pump is installed in the feed block, and deep holes are provided on the opposite sides of the detection block symmetrically distributed on the same fourth electric slide rail. The deep holes are connected to the fixed air pump through a conduit. The detection block cooperates with the adjacent limit member to form a fixed cavity, and the fixed cavity is connected to the adjacent deep hole.

Images