Lead frame adjusting bending machine facilitating bending angle adjustment

Abstract

The utility model discloses a lead frame adjustment bending machine convenient to adjust bending angle, which belongs to the technical field of lead frame adjustment and comprises a processing table, a support plate is arranged below the processing table, the upper surface of the support plate is in bolted connection with a hydraulic cylinder, and the output end of the hydraulic cylinder is fixedly connected with an extrusion block. The left side of the upper surface of the machining table is in bolted connection with a motor. According to the lead frame adjusting bending machine convenient to adjust the bending angle, a threaded rod is arranged at the position, located above the motor, of the machining table, and the bottom of the threaded rod is fixedly connected with the output end of the motor. According to the lead frame adjusting bending machine convenient to adjust the bending angle, by rotating a driving gear, two racks move relatively or oppositely, and meanwhile two pressing plates are driven to move relatively or oppositely, so that the clamping position of a lead frame can be adjusted, and the final bending angle of the lead frame can be controlled; therefore, the purpose of conveniently adjusting the bending angle of the lead frame is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lead frame adjustment, in particular to a bending machine for adjusting a lead frame which is convenient for adjusting a bending angle. Background Art

[0002] The TO-3PH series of conductor back-end packaging often has the phenomenon of insufficient plastic resin filling and melt accumulation marks on the back due to the influence of plastic molding mold flow. Now, without any modification of the plastic molding mold, the mold flow trajectory is changed by bending the lead frame. Usually, a bending machine is required to bend the lead frame. For example, a semiconductor lead frame bending machine with a publication number of "CN220406761U" has an "L"-shaped longitudinal section of the limit block and a threaded connection between the upper end of the limit block and the first adjustment rod, so that the distance between the left side of the limit block and the fixed plate can be adjusted, thereby controlling the final bending angle of the lead frame to meet different Processing technology requirements: The second adjusting rod is threadedly connected to the limit frame, and the lower end of the second adjusting rod is rotatably connected to the positioning bar, and the cross-sections of the limit frame and the positioning bar are both "U"-shaped, and the limit column and the limit frame are slidably connected, so that the positioning bar can move downward and position the semiconductor lead frame to avoid movement during the bending process; the third adjusting rod is threadedly connected to the connecting frame and the connecting frame is slidably connected to the limiting frame, so that the connecting frame can be adjusted left and right, so as to limit the lead frames of different sizes and increase adaptability. However, the semiconductor lead frame bending machine still has the following disadvantages in actual use:

[0003] When the above mechanism is in use, the fixed plate is raised by the hydraulic rod to achieve bending of the lead frame, but the bending angle of the lead frame is fixed each time. However, lead frames of different sizes require different bending angles, so that some lead frames have a larger bending angle, while some lead frames have a smaller bending angle, resulting in the inability to adjust the bending angle of the lead frame to meet different processing requirements.

[0004] Therefore, we proposed a lead frame adjustment bending machine that is easy to adjust the bending angle to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a bending machine for adjusting a lead frame which is easy to adjust the bending angle, so as to solve the problem proposed in the above background technology that the bending angle of the lead frame is fixed each time, resulting in the inability to adjust the bending angle of the lead frame to meet different processing requirements.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A bending machine for adjusting the lead frame, which is convenient for adjusting the bending angle, includes a processing table. A support plate is arranged below the processing table, and a hydraulic cylinder is bolted to the upper surface of the support plate. The output end of the hydraulic cylinder is fixedly connected with a pressing block. A motor is bolted to the left side of the upper surface of the processing table.

[0007] A bending machine for adjusting the lead frame, which is convenient for adjusting the bending angle, further includes:

[0008] A threaded rod is arranged above the motor on the processing table, and the bottom of the threaded rod is fixedly connected with the output end of the motor. A fixed rod is fixedly connected to the right side of the upper surface of the processing table, and a movable plate is sleeved on the outer sides of the fixed rod and the threaded rod;

[0009] A shaft rod is rotatably connected to the middle position inside the movable plate, and a driving gear is sleeved and fixed on the outer side of the shaft rod. Rack bars are slidably connected inside the movable plate, and pressing plates are fixed on one side of the bottoms of the two rack bars.

[0010] Preferably, the movable plate is threadedly connected to the threaded rod, and the movable plate is slidably connected to the suction pipe. The two rack bars are meshed with the driving gear. The pressing block is arranged in a U shape, and both ends of the pressing block penetrate through the inside of the processing table, and the pressing block is slidably connected to the processing table.

[0011] Preferably, the top of the shaft rod penetrates through the inside of the movable plate, and a turntable is fixed to the top end of the shaft rod. A limiting rod is hinged to the left side of the top of the turntable. Fixed blocks are fixedly connected to the upper surface of the movable plate at equal angles with respect to the center point of the shaft rod, and limiting grooves are formed at the tops of the fixed blocks. A torsion spring is installed at the connection position between the shaft end of the limiting rod and the turntable.

[0012] Preferably, the positions of the limiting rod and the fixed block correspond to each other, and the limiting rod is snap-fitted with the limiting groove.

[0013] Preferably, a box body is fixedly connected to the upper surface of the support plate with respect to the center point of the hydraulic cylinder. A first air bag is arranged at the bottom of the inner wall of the box body, and a second air bag is arranged at the top of the inner wall of the box body. Guide blocks are fixedly connected to both sides of the bottom of the pressing block, and the bottoms of the two guide blocks extend into the inside of the box body. Connecting pipes are fixedly connected to the left and right sides of the upper surface of the processing table, and air outlets are formed on the side surfaces of the tops of the connecting pipes. Cavities are formed in the left and right sides of the inside of the processing table, and heating wires are installed on the inner walls of the cavities. A first air pipe is installed between the second air bag and the cavities and the connecting pipes. A second air pipe is installed between the first air bag and the connecting pipes. Suction pipes are arranged at one ends of the first air bag and the second air bag.

[0014] Preferably, the guide block is arranged in an inverted "T" shape, and the guide block is arranged between the first airbag and the second airbag.

[0015] Preferably, the second airbag is connected to the cavity and the through pipe through the first air pipe, the first airbag is connected to the through pipe through the second air pipe, and one-way valves are installed inside the suction pipe, the first air pipe and the second air pipe.

[0016] Compared with the prior art, the beneficial effect of the utility model is that the bending machine for adjusting the lead frame which is convenient for adjusting the bending angle can adjust the clamping position of the lead frame and control the final bending angle of the lead frame by rotating the driving gear to make the two racks move relative to or oppositely, and at the same time drive the two clamping plates to move relative to or oppositely, so as to achieve the purpose of facilitating the adjustment of the bending angle of the lead frame. The specific contents are as follows:

[0017] (1) By rotating the shaft, the driving gear drives the two meshing racks to move relative to or in the opposite direction, and at the same time, the two connecting plates drive the two clamping plates to move relative to or in the opposite direction, thereby adjusting the clamping position of the lead frame, and then using the hydraulic cylinder to drive the extrusion block to move upward to bend the lead frame, thereby facilitating the adjustment of the bending angle of the lead frame;

[0018] Furthermore, by loosening the limit rod, the limit rod is rotated and reset under the stored force of the torsion spring and is inserted into the corresponding limit groove, so that the rotated shaft rod and the driving gear can be limited to prevent deflection during use;

[0019] (2) When the hydraulic cylinder drives the squeezing block to move upward, the guide block will squeeze the second airbag upward, so that the gas released by the second airbag under pressure will be transported to the cavity through the first air pipe, and at the same time, the hot air in the cavity will be blown toward the lead frame from the air outlet on the through pipe, so that the bent part of the lead frame can be heated to prevent the lead frame from breaking when it is bent;

[0020] (3) When the hydraulic cylinder drives the extrusion block to move upward, the guide block will squeeze the first airbag, so that the gas released by the first airbag under pressure will be blown out from the air outlet on the through pipe, thereby cooling and shaping the bent part of the lead frame, preventing the bent part from deforming, and improving the quality of the bending;

[0021] Furthermore, when the first airbag and the second airbag are not squeezed, they can restore to their original state by themselves and automatically replenish gas using the intake pipe. Then, the one-way valve is used to ensure that the gas in the first airbag is only transported from the second air pipe to the through pipe, and the outside gas only enters the first airbag from the intake pipe. At the same time, the gas in the second airbag and the cavity is only transported from the first air pipe to the through pipe, and the outside gas only enters the second airbag from the intake pipe, thereby preventing gas turbulence. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the pressing plate moving upwards in the utility model;

[0024] Figure 3 This is a schematic diagram of the top view of the active gear and rack structure of the utility model;

[0025] Figure 4 This is a schematic diagram of the top view of the limit rod and the fixing block of the utility model;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the extrusion block and the guide block of the utility model;

[0027] Figure 6 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0028] Figure 7 It is a schematic diagram of the connection structure between the through pipe and the first gas pipe and the second gas pipe of the utility model.

[0029] In the figure: 1. processing table; 2. support plate; 3. hydraulic cylinder; 4. threaded rod; 5. fixed rod; 6. movable plate; 7. clamping plate; 8. suction pipe; 9. shaft rod; 10. driving gear; 11. rack; 12. limit rod; 13. fixed block; 14. extrusion block; 15. box body; 16. first air bag; 17. first air supply pipe; 18. second air supply pipe; 19. guide block; 20. cavity; 21. heating wire; 22. one-way valve; 23. through pipe; 24. second air bag. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-Figure 7 , the utility model provides the following technical solutions: a bending machine for adjusting a lead frame that is convenient for adjusting the bending angle;

[0032] Embodiment 1: In order to solve the problem that the bending angle of the lead frame is fixed each time in the prior art, which makes it impossible to adjust the bending angle of the lead frame to meet different processing requirements, the following solution is disclosed. Figure 1-Figure 3 With Figure 5 And Figure 6 As shown, it includes a processing table 1. A support plate 2 is arranged below the processing table 1, and a hydraulic cylinder 3 is bolted to the upper surface of the support plate 2. The output end of the hydraulic cylinder 3 is fixedly connected with a pressing block 14. A motor is bolted to the left side of the upper surface of the processing table 1;

[0033] It further includes: A threaded rod 4 is arranged above the motor on the processing table 1, and the bottom of the threaded rod 4 is fixedly connected with the output end of the motor. A fixed rod 5 is fixedly connected to the right side of the upper surface of the processing table 1, and a movable plate 6 is sleeved on the outer sides of the fixed rod 5 and the threaded rod 4; A shaft rod 9 is rotatably connected to the middle position inside the movable plate 6, and a driving gear 10 is fixedly sleeved on the outer side of the shaft rod 9. Rack bars 11 are slidably connected inside the movable plate 6, and pressing plates 7 are fixed to one side of the bottoms of the two rack bars 11. The movable plate 6 is in threaded connection with the threaded rod 4, and the movable plate 6 is in sliding connection with the air suction pipe 8. The two rack bars 11 are in meshing connection with the driving gear 10. The pressing block 14 is arranged in a U shape, and both ends of the pressing block 14 penetrate through the inside of the processing table 1, and the pressing block 14 is in sliding connection with the processing table 1;

[0034] Place the lead frame on the processing table 1, and then the staff manually rotates the limit rod 12 upward to separate it from the limit groove at the initial position, thereby releasing the limit on the shaft rod 9. Then the staff manually rotates the shaft rod 9, so that the driving gear 10 drives the two meshing rack bars 11 to move relatively or in the opposite direction, and at the same time drives the two pressing plates 7 to move relatively or in the opposite direction, so as to adjust the clamping position of the lead frame. Then start the motor, and the motor drives the threaded rod 4 to rotate, so that the movable plate 6 moves downward on the threaded rod 4 and the fixed rod 5, and drives the two pressing plates 7 to clamp and fix the lead frame downward to prevent the lead frame from shifting during the bending process. Then start the hydraulic cylinder 3, so that the hydraulic cylinder 3 drives the pressing block 14 to move upward to bend the lead frame, so as to adjust the clamping position of the lead frame and control the final bending angle of the lead frame, achieving the purpose of facilitating the adjustment of the bending angle of the lead frame.

[0035] Embodiment 2: Different from Embodiment 1, in this embodiment, the energy storage of the torsion spring can drive the limit rod 12 to rotate and reset and snap into the corresponding limit groove, which can limit the rotated shaft rod 9 and driving gear 10 to prevent deflection during use. For specific reference, see Figure 1 And Figure 4As shown, the top of the shaft rod 9 passes through the interior of the movable plate 6, and a turntable is fixed on the top of the shaft rod 9, and a limit rod 12 is hinged on the left side of the top of the turntable, and a fixed block 13 is fixedly connected to the upper surface of the movable plate 6 at an equal angle with respect to the center point of the shaft rod 9, and a limit slot is provided on the top of the fixed block 13, and a torsion spring is installed at the connection position between the shaft end of the limit rod 12 and the turntable, and the position of the limit rod 12 corresponds to that of the fixed block 13, and the limit rod 12 and the limit slot are snap-fitted;

[0036] After adjusting the distance between the two clamping plates 7, the staff loosens the limit rod 12, allowing it to rotate and reset under the force storage of the torsion spring and snap into the corresponding limit groove, thereby limiting the rotated shaft rod 9 and the driving gear 10 to prevent deflection during use.

[0037] Embodiment 3: Different from Embodiment 2, this embodiment utilizes the second airbag 24 and the heating wire 21 to heat the bent portion of the lead frame to prevent the lead frame from breaking when being bent. At the same time, the first airbag 16 is utilized to cool and shape the bent portion of the lead frame to prevent deformation of the bent portion and improve the quality of the bending. For details, refer to Figure 1 , Figure 2 , Figure 5 and Figure 7 As shown, a box body 15 is fixedly connected to the upper surface of the support plate 2 about the center point of the hydraulic cylinder 3, and a first air bag 16 is arranged at the bottom of the inner wall of the box body 15, and a second air bag 24 is arranged at the top of the inner wall of the box body 15, and guide blocks 19 are fixedly connected to both sides of the bottom of the extrusion block 14, and the bottoms of the two guide blocks 19 extend into the interior of the box body 15, and the guide blocks 19 are arranged in an inverted "T" shape, and the guide blocks 19 are arranged between the first air bag 16 and the second air bag 24, and the left and right sides of the upper surface of the processing table 1 are fixedly connected to the through pipe 23, and the side surface of the top of the through pipe 23 is provided with an air outlet, and the processing table 1 is provided with a plurality of air bags. A cavity 20 is provided on both sides of the left and right sides of the part, and a heating wire 21 is installed on the inner wall of the cavity 20, a first air pipe 17 is installed between the second air bag 24 and the cavity 20 and the through pipe 23, a second air pipe 18 is installed between the first air bag 16 and the through pipe 23, an air suction pipe 8 is provided at one end of the first air bag 16 and the second air bag 24, the second air bag 24 is connected to the cavity 20 and the through pipe 23 through the first air pipe 17, the first air bag 16 is connected to the through pipe 23 through the second air pipe 18, and a one-way valve 22 is installed inside the air suction pipe 8, the first air pipe 17 and the second air pipe 18;

[0038] When the hydraulic cylinder 3 drives the extrusion block 14 to move upward, the guide block 19 will squeeze the second airbag 24 upward, so that the gas released by the second airbag 24 under pressure is transported to the cavity 20 through the first air pipe 17, and at the same time, the heating wire 21 is started to heat the air in the cavity 20, and the hot air in the cavity 20 is blown toward the lead frame from the air outlet on the through pipe 23, so that the bending part of the lead frame can be heated to avoid breakage of the lead frame when it is bent. Then, when the hydraulic cylinder 3 drives the extrusion block 14 to move downward, the guide block 19 will squeeze the first airbag 16, so that the gas released by the first airbag 16 under pressure is transported to the through pipe 23 through the second air pipe 18. 23, and then blown out through the air outlet, so as to cool and shape the bent part of the lead frame, prevent the bent part from deformation, and improve the quality of the bending. Then, when the first air bag 16 and the second air bag 24 are not squeezed, they can restore to their original state by themselves, and use the suction pipe 8 to automatically replenish the gas. Then, the one-way valve 22 is used to make the gas in the first air bag 16 only be transported from the second air pipe 18 to the through pipe 23, and the outside gas only enters the first air bag 16 from the suction pipe 8. At the same time, the gas in the second air bag 24 and the cavity 20 is only transported from the first air pipe 17 to the through pipe 23, and the outside gas only enters the second air bag 24 from the suction pipe 8, so as to prevent gas turbulence.

[0039] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bending machine for adjusting a lead frame, which is convenient for adjusting the bending angle, includes a processing table (1). A support plate (2) is arranged below the processing table (1), and a hydraulic cylinder (3) is bolted to the upper surface of the support plate (2). The output end of the hydraulic cylinder (3) is fixedly connected with a pressing block (14). A motor is bolted to the left side of the upper surface of the processing table (1). It is characterized in that It also includes: A threaded rod (4) is arranged above the motor on the processing table (1), and the bottom of the threaded rod (4) is fixedly connected with the output end of the motor. A fixed rod (5) is fixedly connected to the right side of the upper surface of the processing table (1). A movable plate (6) is sleeved on the outer sides of the fixed rod (5) and the threaded rod (4). A shaft rod (9) is rotatably connected to the middle position inside the movable plate (6), and a driving gear (10) is fixedly sleeved on the outer side of the shaft rod (9). Two racks (11) are slidably connected inside the movable plate (6), and pressing plates (7) are fixed to one side of the bottoms of the two racks (11).

2. A lead frame adjustment bending machine that is convenient for adjusting the bending angle according to claim 1, characterized in that: The movable plate (6) is in threaded connection with the threaded rod (4), and the movable plate (6) is in sliding connection with the air suction pipe (8). The two racks (11) are in meshing connection with the driving gear (10). The pressing block (14) is arranged in a U shape, and both ends of the pressing block (14) penetrate through the inside of the processing table (1), and the pressing block (14) is in sliding connection with the processing table (1).

3. The lead frame adjustment bending machine that is convenient for adjusting the bending angle according to claim 1, characterized in that: The top of the shaft rod (9) penetrates through the inside of the movable plate (6), and a turntable is fixed to the top end of the shaft rod (9). A limiting rod (12) is hinged to the left side of the top of the turntable. Fixed blocks (13) are fixedly connected to the upper surface of the movable plate (6) at equal angles about the center point of the shaft rod (9). A limiting groove is opened at the top of the fixed block (13). A torsion spring is installed at the connection position between the shaft end of the limiting rod (12) and the turntable.

4. A lead frame adjustment bending machine that is convenient for adjusting the bending angle according to claim 3, characterized in that: The position of the limiting rod (12) corresponds to that of the fixed block (13), and the limiting rod (12) is in snap connection with the limiting groove.

5. The lead frame adjustment bending machine that is convenient for adjusting the bending angle according to claim 1, characterized in that: A box body (15) is fixedly connected to the upper surface of the support plate (2) about the center point of the hydraulic cylinder (3). A first air bag (16) is arranged at the bottom of the inner wall of the box body (15), and a second air bag (24) is arranged at the top of the inner wall of the box body (15). Guide blocks (19) are fixedly connected to both sides of the bottom of the pressing block (14), and the bottoms of the two guide blocks (19) extend into the inside of the box body (15). Through pipes (23) are fixedly connected to the left and right sides of the upper surface of the processing table (1), and air outlets are opened on the side surfaces of the tops of the through pipes (23). Cavities (20) are opened on the left and right sides inside the processing table (1), and heating wires (21) are installed on the inner walls of the cavities (20). A first air pipe (17) is installed between the second air bag (24) and the cavities (20) and the through pipes (23). A second air pipe (18) is installed between the first air bag (16) and the through pipes (23). Air suction pipes (8) are arranged at one ends of the first air bag (16) and the second air bag (24).

6. A lead frame adjustment bending machine that is convenient for adjusting the bending angle according to claim 5, characterized in that: The guide block (19) is arranged in an inverted "T" shape, and the guide block (19) is arranged between the first airbag (16) and the second airbag (24).

7. The lead frame adjustment bending machine that is convenient for adjusting the bending angle according to claim 5, characterized in that: The second air bag (24) is connected to the cavity (20) and the through pipe (23) via the first air pipe (17), the first air bag (16) is connected to the through pipe (23) via the second air pipe (18), and one-way valves (22) are installed inside the air intake pipe (8), the first air pipe (17) and the second air pipe (18).

Images