Blanking die with anti-deviation structure for lead frame

Abstract

The utility model provides a blanking die with an anti-deviation structure for a lead frame, which belongs to the technical field of blanking dies and comprises a lower fixed die and an upper movable die, and the lower fixed die is positioned below the upper movable die; the lower anti-deviation assembly is arranged at the top of the lower fixed mold; the upper anti-deviation assembly is arranged at the bottom of the upper movable mold; the lower anti-deviation assembly comprises a guide column and three elastic air bags, the guide column and the three elastic air bags are arranged on the top of the lower fixed mold, and the guide column is located on the inner sides of the three elastic air bags. The two one-way valves are arranged on the outer side wall of the elastic air bag; by means of the lubricant filled in the guide sleeve, friction force generated when the guide sleeve moves on the outer side of the guide column can be reduced, abrasion is reduced, precision of a guide track is guaranteed, deviation prevention of the blanking die is achieved, and leakage of the lubricant can be effectively avoided and it is guaranteed that the guide position is always in a lubricating state due to the fact that the annular piston moves in a sealed piston mode.

Description

Technical Field

[0001] This utility model belongs to the field of blanking die technology, specifically relating to a blanking die for a lead frame with an anti-deviation structure. Background Technology

[0002] Blanking is a stamping process that uses a die to separate part of the material or workpiece from another part of the material, workpiece or scrap. Some lead frames require blanking dies for blanking during the processing.

[0003] Existing blanking dies have guide structures in place during the blanking process to ensure the accuracy of the blanking position. Due to repeated friction, the guide structure is prone to wear, which can cause the guide trajectory to deviate and the blanking die to shift. It can also cause the temperature of the guide structure to gradually rise, which can lead to deformation of the guide under thermal expansion, thus affecting the guiding accuracy.

[0004] Therefore, a punching die for a lead frame with an anti-offset structure is proposed. Summary of the Invention

[0005] This invention provides a punching die for a lead frame with an anti-offset structure, the purpose of which is to solve the problems mentioned above.

[0006] This utility model provides a punching die for a lead frame with an anti-deviation structure, including a lower fixed die and an upper moving die, the lower fixed die being located below the upper moving die; a lower anti-deviation component disposed on the top of the lower fixed die; and an upper anti-deviation component disposed on the bottom of the upper moving die; wherein the lower anti-deviation component includes: a guide post and three elastic air bladders disposed on the top of the lower fixed die, the guide post being located inside the three elastic air bladders; two one-way valves disposed on the outer wall of the elastic air bladders; an air outlet opened on the top of the lower fixed die near the space between two adjacent elastic air bladders; and a vertical needle disposed on the top of the lower fixed die near the outer side of the three elastic air bladders; wherein the upper anti-deviation component includes: a guide sleeve penetrating the bottom of the upper moving die; an annular sleeve integrally formed on the bottom of the guide sleeve; an annular piston disposed on the top of the annular sleeve near the inner side of the guide sleeve; a guide wheel rotating on the inner wall of the guide sleeve; and a heat dissipation perforation penetrating the bottom of the guide sleeve near the air outlet.

[0007] Furthermore, a lead frame blanking cavity is provided at the top center of the lower fixed die, and a lead frame blanking table is provided at the bottom center of the upper moving die. The lead frame blanking table and the lead frame blanking cavity are matched and fit together.

[0008] Furthermore, the outer wall of the guide wheel and the outer wall of the guide post are in rolling contact;

[0009] By adopting the above technical solutions, frictional resistance is reduced, thereby reducing wear.

[0010] Furthermore, the interior of the guide sleeve is filled with lubricant near the upper part of the annular piston;

[0011] By adopting the above technical solution, the friction force of the guide sleeve moving on the outside of the guide post can be reduced by using lubricant, thereby reducing wear and achieving anti-deviation.

[0012] Both of the aforementioned one-way valves are connected to the elastic airbag, and the interior of the lower mold is provided with an airflow channel that allows one of the one-way valves to connect with the air outlet;

[0013] By adopting the above technical solution, a one-way gas flow channel is formed by two one-way valves and an elastic airbag. Gas flow is achieved during the contraction and expansion of the elastic airbag, and the gas is ejected upward from the outlet after passing through the airflow channel. The pressure during the die punching process is used to achieve gas flow and accelerate heat dissipation.

[0014] Furthermore, there are three sets of vertical needles, which are equally spaced around the vertical axis of the guide sleeve, and the vertical needles are in close contact with the outer wall of the guide sleeve.

[0015] By adopting the above technical solution, the position of the guide sleeve can be detected by the vertical needle. When the guide sleeve is offset, the part of the vertical needle that is squeezed will be deformed and bent. By observing the deformation state of the vertical needle, the offset of the mold can be judged, and the problem can be detected and repaired in time.

[0016] Furthermore, the guide post passes through the annular piston, and the annular piston and the guide post piston are connected in a sealed manner;

[0017] By adopting the above technical solution, the piston-like movement can ensure the sealing of the annular piston as it moves outside the guide post, thus preventing lubricant leakage.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention reduces friction as the guide sleeve moves outside the guide post by filling it with lubricant, thus reducing wear, ensuring the accuracy of the guide trajectory, and preventing deviation of the punching die. The sealed piston-like movement of the annular piston effectively prevents lubricant leakage, ensuring the guide is always lubricated. The pressure during the punching process compresses the elastic air bladder, causing gas to flow upwards. The high-speed gas passing through the heat dissipation perforations on the guide sleeve accelerates heat dissipation from the guide sleeve and its inner lubricant, effectively reducing the temperature at the guide. This prevents thermal expansion and deformation caused by repeated friction, thus affecting the guiding accuracy and further preventing deviation.

[0020] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of the lower mold structure according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the upper moving mold structure according to an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the internal structure of the guide sleeve according to an embodiment of the present utility model;

[0026] Figure 5 This is an embodiment of the present utility model. Figure 2 Enlarged view of point A in the image;

[0027] Reference numerals in the attached drawings: 1. Lower fixed mold; 2. Upper moving mold; 3. Lower anti-deviation assembly; 31. Guide post; 32. Elastic airbag; 33. One-way valve; 34. Air outlet; 35. Vertical needle; 4. Upper anti-deviation assembly; 41. Guide sleeve; 42. Ring sleeve; 43. Annular piston; 44. Guide wheel; 45. Heat dissipation perforation; 5. Lead wire frame punching cavity; 6. Lead wire frame punching table. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] Reference Figure 1-5This utility model embodiment proposes a blanking die for a lead frame with an anti-deviation structure, including a lower fixed die 1 and an upper moving die 2. The lower fixed die 1 is located below the upper moving die 2. The top of the lower fixed die 1 is provided with a guide post 31 and three elastic airbags 32 from the lower anti-deviation assembly 3. The guide post 31 is located inside the three elastic airbags 32. Each of the three elastic airbags 32 has two one-way valves 33 for air intake and exhaust on its outer side wall. Both one-way valves 33 are connected to the elastic airbags 32. The interior of the lower fixed die 1 has an opening that allows one of the one-way valves to pass through. The airflow channel connecting the valve 33 and the air outlet 34 forms a one-way gas flow channel through the two one-way valves 33 and the elastic air bag 32. Gas flow is achieved during the contraction and expansion of the elastic air bag 32, and the gas is ejected upward from the air outlet 34 after passing through the airflow channel. The pressure during the die punching process is used to achieve gas flow and accelerate heat dissipation. The air outlet 34 is opened on the top of the one-way valve 33 near the side of the elastic air bag 32. The top of the lower die 1 is provided with vertical needles 35 near the outside of the three elastic air bags 32.

[0030] The bottom of the upper moving mold 2 is provided with a guide sleeve 41 from the upper anti-offset assembly 4. Three sets of vertical pins 35 are provided, evenly spaced around the vertical axis of the guide sleeve 41. The pins 35 are close to the outer wall of the guide sleeve 41, and their position can be detected. When the guide sleeve 41 is offset, the compressed portion of the pin 35 will deform and bend. By observing the deformation of the pins 35, the offset of the mold can be determined, allowing for timely repair. A ring sleeve 42 is integrally formed at the bottom of the guide sleeve 41. An annular piston 43 is located at the top of the ring sleeve 42 near the inner side of the guide sleeve 41. The guide sleeve 41 is located inside the ring sleeve 41 near the upper part of the annular piston 43. The guide sleeve 31 is filled with lubricant and passes through the annular piston 43. The annular piston 43 and the guide sleeve 31 are connected in a piston-sealed manner. The lubricant can reduce the friction of the guide sleeve 41 moving outside the guide sleeve 31, reduce wear, and thus prevent deviation. The piston-like movement can ensure the sealing of the annular piston 43 moving outside the guide sleeve 31 and prevent lubricant leakage. A guide wheel 44 is rotatably connected to the inner wall of the guide sleeve 41 near the upper position of the annular piston 43. The outer wall of the guide wheel 44 and the outer wall of the guide sleeve 31 make rolling contact to reduce frictional resistance and thus reduce wear. A heat dissipation perforation 45 is opened at the bottom of the guide sleeve 41 near the air outlet 34.

[0031] A wire frame blanking cavity 5 is provided at the top center of the lower fixed die 1, and a wire frame blanking table 6 matching the wire frame blanking cavity 5 is provided at the bottom center of the upper moving die 2.

[0032] The specific implementation method is as follows: Lubricant is poured into the guide sleeve 41. During the lead frame punching, the raw material is placed in the lead frame punching cavity 5. The upper moving die 2 moves towards the lower fixed die 1 under the action of an external vertical driving force. The guide sleeve 41 on the upper moving die 2 moves downward synchronously. The guide sleeve 41 is located outside the guide post 31. Under the rolling guidance of the guide wheel 44, the guide sleeve 41 moves downward along the guide post 31. Under the sealing cooperation between the annular piston 43 and the guide post 31, the lubricant is continuously filled in the guide sleeve 41, thereby reducing the friction between the guide wheel 44 and the guide post 31 through lubrication. The force also reduces the rotational friction of the guide wheel 44. As the upper moving mold 2 continues to move downward, the ring 42 at the bottom of the guide sleeve 41 contacts and presses the elastic air bag 32. The elastic air bag 32 is compressed, and the gas in the elastic air bag 32 enters the air outlet 34 through one of the one-way valves 33. The air outlet 34 discharges the gas upward. The gas passes through the heat dissipation perforation 45 and uses the flowing gas to dissipate heat on the guide sleeve 41 and the internal lubricant, so as to avoid the guide deviation caused by the thermal expansion of the upper anti-deviation component 4. The lead frame punching table 6 is inserted into the lead frame punching cavity 5 to punch the raw material inside.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A punching die for a lead frame with an anti-offset structure, characterized in that: It includes a lower fixed mold (1) and an upper moving mold (2), wherein the lower fixed mold (1) is located below the upper moving mold (2); The lower anti-offset assembly (3) is provided on the top of the lower fixed mold (1); An upper anti-offset assembly (4) is provided at the bottom of the upper moving mold (2); The lower anti-offset component (3) includes: A guide post (31) and three elastic airbags (32) are provided on the top of the lower mold (1), and the guide post (31) is located inside the three elastic airbags (32); Two one-way valves (33) are provided on the outer wall of the elastic airbag (32); An air outlet (34) is opened at the top of the lower mold (1) near the two adjacent elastic air bags (32); A vertical pin (35) is located at the top of the lower mold (1) near the outer side of the three elastic airbags (32); The upper anti-offset component (4) includes: A guide sleeve (41) is provided at the bottom of the upper moving mold (2); A ring sleeve (42) integrally formed at the bottom of the guide sleeve (41); An annular piston (43) is located at the top of the ring sleeve (42) near the inner side of the guide sleeve (41); The guide wheel (44) rotates on the inner wall of the guide sleeve (41); and A heat dissipation perforation (45) is opened through the bottom of the guide sleeve (41) near the air outlet (34) directly above it.

2. The blanking die for a lead frame having an anti-offset structure according to claim 1, characterized in that: The lower fixed die (1) has a lead frame blanking cavity (5) at the top center position, and the upper moving die (2) has a lead frame blanking table (6) at the bottom center position. The lead frame blanking table (6) and the lead frame blanking cavity (5) are matched and fit together.

3. The blanking die for a lead frame having an anti-offset structure according to claim 1, wherein: The outer wall of the guide wheel (44) and the outer wall of the guide post (31) are in rolling contact.

4. The blanking die for a lead frame having an anti-offset structure according to claim 1, wherein: The inside of the guide sleeve (41) is filled with lubricant near the top of the annular piston (43).

5. The blanking die for a lead frame having an anti-offset structure according to claim 1, wherein: Both of the one-way valves (33) are connected to the elastic airbag (32), and the interior of the lower mold (1) is provided with an airflow channel that allows one of the one-way valves (33) to connect with the air outlet (34).

6. The blanking die for a lead frame having an anti-offset structure according to claim 1, wherein: The vertical needles (35) are arranged in three groups. The three groups of vertical needles (35) are arranged at equal intervals with the vertical axis of the guide sleeve (41) as the center. The vertical needles (35) are close to the outer wall of the guide sleeve (41).

7. The die-cutting mold for a lead frame having an anti-skewing structure according to claim 1, wherein: The guide post (31) passes through the annular piston (43), and the annular piston (43) and the guide post (31) are connected in a piston-sealed manner.

Images