Positioning mechanism for a stamping die

Abstract

The utility model provides a positioning mechanism for punch -die belongs to die positioning technical field, including lower mould and upper die, the lower mould is located upper die below, fixed in the cylindrical of lower mould top, fixed in the positioning sleeve of cylindrical top, the detection groove of axial equidistance is opened in the outside wall of positioning sleeve, is located in the inside detection groove's judgment board, is located in the spring of judgment board outside wall, the two half ring grooves of symmetry is opened in the lower mould top close cylindrical outside position department, the three -phase motor of fixed in the lower mould inside close cylindrical just below position department, the utility model discloses whether the eccentricity between positioning sleeve and positioning rod is produced through the difference change of the ranging value produced to judge, avoids the positioning rod long -time to positioning sleeve in one direction rubs, avoids the eccentric wear of guide bush and guide column in mould in various factors causes, is convenient for timely maintenance and maintenance, guarantees the precision of positioning mechanism positioning in mould.

Description

Technical Field

[0001] This utility model belongs to the field of mold positioning technology, and specifically relates to a positioning mechanism for stamping dies. Background Technology

[0002] As a chip carrier for integrated circuits, the lead frame is a device that uses bonding materials to achieve electrical connection between the internal circuit leads of the chip and the external leads. During the manufacturing process, the lead frame needs to be stamped using a stamping die.

[0003] Existing stamping dies are equipped with guide and positioning structures to ensure precise alignment of the upper and lower dies. However, during use, stamping dies are affected by various external factors (such as the direction of the driving force of the moving die shifting or the die shifting due to vibration), which can easily lead to eccentric wear of the guide and positioning structures. This can cause the upper and lower dies to shift, affecting the stamping accuracy.

[0004] Therefore, a positioning mechanism for stamping dies is proposed. Summary of the Invention

[0005] This utility model provides a positioning mechanism for stamping dies, the purpose of which is to solve the problems mentioned above.

[0006] This utility model provides a positioning mechanism for a stamping die, including a lower die and an upper die, the lower die being located below the upper die; a cylinder fixed to the top of the lower die; a positioning sleeve fixed to the top of the cylinder; detection grooves axially spaced at equal intervals on the outer wall of the positioning sleeve; a judgment plate disposed inside the detection grooves; a spring disposed on the outer wall of the judgment plate; two semi-annular grooves symmetrically disposed on the top of the lower die near the outer side of the cylinder; a three-phase motor fixed inside the lower die near the bottom of the cylinder; a turntable fixed to the output end of the three-phase motor; two infrared ranging sensors symmetrically disposed on the top of the turntable; and a positioning rod fixed to the bottom of the upper die near the top of the positioning sleeve.

[0007] Furthermore, the top of the lower die is symmetrically provided with four guide sleeves, and the bottom of the upper die is provided with guide posts at positions directly above the four guide posts. One end of each guide post can be inserted into the interior of the guide sleeve. The top of the lower die is provided with a mold cavity for stamping the lead frame, and the bottom of the upper die is provided with a mold core for stamping the lead frame.

[0008] Furthermore, the inner wall of the positioning sleeve and the outer wall of the positioning rod are precisely fitted together;

[0009] By adopting the above technical solution, the positioning sleeve can be used to position the positioning rod and wear can be reduced.

[0010] Furthermore, the cross-section of the judgment plate is a cross shape, and the inner sidewall of the detection groove is provided with a groove on the outer side of the protruding part of the outer sidewall of the judgment plate, and the spring is located inside the groove.

[0011] By adopting the above technical solution, the setting of the cross-shaped judgment plate and the groove can provide space for the setting of the spring, thereby ensuring that the judgment plate is always in a limited position and preventing the judgment plate from shaking in the detection groove.

[0012] Furthermore, the infrared ranging sensor passes through the semi-annular groove, and the infrared emitting end of the infrared ranging sensor is located at the outer edge of the positioning sleeve.

[0013] By adopting the above technical solution, the rotation trajectory of the turntable is guaranteed.

[0014] Furthermore, an inner cavity is provided inside the lower mold near the outer side of the three-phase motor and the turntable;

[0015] By adopting the above technical solution, the internal cavity design facilitates the installation of the three-phase motor and the rotation of the turntable.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention uses the horizontal thrust of the positioning rod on the judgment plate and real-time detection of whether the judgment plate protrudes from the outer wall of the positioning sleeve. It uses the difference in the generated distance value to determine whether there is eccentricity between the positioning sleeve and the positioning rod, avoiding the positioning rod from rubbing the positioning sleeve in one direction for a long time, avoiding eccentric wear of the guide sleeve and guide post in the mold caused by various factors, facilitating timely inspection and maintenance, ensuring the positioning accuracy of the positioning mechanism in the mold, and thus ensuring the stamping accuracy of the lead frame.

[0018] 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

[0019] 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:

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the lower mold structure according to an embodiment of the present utility model;

[0022] Figure 3 This is an embodiment of the present utility model. Figure 1 Enlarged diagram of point A in the diagram;

[0023] Figure 4 This is a schematic diagram of the positioning sleeve and the judgment plate in an embodiment of the present utility model.

[0024] Figure 5 This is a schematic diagram of the upper mold structure according to an embodiment of the present utility model;

[0025] Reference numerals in the attached drawings: 1. Lower mold; 2. Upper mold; 3. Cylinder; 4. Positioning sleeve; 5. Detection groove; 6. Judgment plate; 7. Spring; 8. Semi-annular groove; 9. Three-phase motor; 10. Turntable; 11. Infrared ranging sensor; 12. Positioning rod; 13. Guide sleeve; 14. Guide post. Detailed Implementation

[0026] 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.

[0027] Reference Figure 1-5 This utility model provides a positioning mechanism for a stamping die, including a lower die 1 and an upper die 2. The lower die 1 is located below the upper die 2, and a cylinder 3 is provided on the top of the lower die 1. A positioning sleeve 4 is provided on the top of the cylinder 3, and the outer diameter of the cylinder 3 is smaller than the outer diameter of the positioning sleeve 4, providing a position for the infrared ranging sensor 11. A plurality of detection grooves 5 are axially and equally spaced on the outer wall of the positioning sleeve 4. A judgment plate 6 is provided inside the detection groove 5. One side of the outer wall of the judgment plate 6 is on the same circumferential surface as the inner side wall of the detection groove 5, and the other side of the outer wall of the judgment plate 6 is on the same circumferential surface as the positioning sleeve 4. The outer walls of the 4 are on the same circumferential surface to ensure that the judgment plate 6 does not protrude from the positioning sleeve 4. Then, the protruding state of the judgment plate 6 is used to detect the internal wear of the positioning sleeve 4. A spring 7 is provided on the outer wall of the judgment plate 6. The cross-section of the judgment plate 6 is a "+" shaped structure. A groove is opened on the outer side of the inner wall of the detection groove 5 near the protruding part of the outer wall of the judgment plate 6. The spring 7 is located inside the groove. The "+" shaped judgment plate 6 and the groove can provide space for the spring 7, thereby ensuring that the judgment plate 6 is always in a limited position and preventing the judgment plate 6 from shaking in the detection groove 5.

[0028] Two semi-annular grooves 8 are symmetrically formed on the top of the lower mold 1 near the outer side of the cylinder 3. A three-phase motor 9 is bolted to the interior of the lower mold 1 near the bottom of the cylinder 3. A turntable 10 is fixedly connected to the output end of the three-phase motor 9 on one side. An inner cavity is formed inside the lower mold 1 near the outer side of the three-phase motor 9 and the turntable 10. The inner cavity facilitates the installation of the three-phase motor 9 and the rotation of the turntable 10. The centers of the turntable 10 and the positioning sleeve 4 are on the same vertical axis to ensure the rotation trajectory of the turntable 10. Two semi-annular grooves 8 are symmetrically formed on the top of the turntable 10. An infrared ranging sensor 11 passes through the semi-annular groove 8, and the infrared emitting end of the infrared ranging sensor 11 is located at the outer edge of the outer wall of the positioning sleeve 4. The infrared emitting end can detect the state of the outer edge of the positioning sleeve 4, thereby detecting whether the judgment plate 6 protrudes from the positioning sleeve 4, and further detecting the wear of the inner wall of the positioning sleeve 4. A positioning rod 12 is provided at the bottom of the upper mold 2 near the top of the positioning sleeve 4. The inner wall of the positioning sleeve 4 and the outer wall of the positioning rod 12 are precisely fitted to ensure that the positioning sleeve 4 positions the positioning rod 12 and reduces wear.

[0029] The top of the lower mold 1 is symmetrically provided with four guide sleeves 13, and the bottom of the upper mold 2 is symmetrically provided with four guide pillars 14. One end of the guide pillar 14 can be inserted into the inside of the guide sleeve 13. The top of the lower mold 1 is provided with a mold cavity for stamping the lead frame, and the bottom of the upper mold 2 is provided with a mold core for stamping the lead frame.

[0030] The specific implementation method is as follows: During the stamping of the lead frame, the upper die 2 moves downward under the action of an external vertical driving force through the guide sleeve 13 and the guide post 14. The upper die 2 stamps the raw material placed on the top of the lower die 1. During the stamping process, the positioning rod 12 moves up and down inside the positioning sleeve 4. The three-phase motor 9 drives the turntable 10 to rotate reciprocally through its output end on one side. The infrared ranging sensor 11 on the top of the turntable 10 moves synchronously in a circular motion. The infrared ranging sensor 11 detects whether the judgment plate 6 protrudes from the positioning sleeve 4. When the guide sleeve 13 and the guide post 14 During long-term use, various factors may cause eccentric wear. When the guide post 14 applies pressure to one direction of the guide sleeve 13 for a long time, the inner wall of one side of the guide sleeve 13 is severely worn. At this time, the positioning rod 12 pushes the judgment plate 6, and the judgment plate 6 moves under force and protrudes out of the positioning sleeve 4. At this time, the distance value detected by the infrared ranging sensor 11 during the movement will be different, thus judging that there is an eccentricity between the positioning sleeve 4 and the positioning rod 12. This facilitates timely inspection and maintenance, ensures the positioning accuracy of the positioning mechanism in the mold, and thus ensures the stamping accuracy of the lead frame.

[0031] 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 positioning mechanism for a stamping die, characterized in that: It includes a lower mold (1) and an upper mold (2), wherein the lower mold (1) is located below the upper mold (2); A cylinder (3) fixed to the top of the lower mold (1); A positioning sleeve (4) is fixed to the top of the cylinder (3); Detection grooves (5) are axially and equally spaced on the outer wall of the positioning sleeve (4); A judgment plate (6) is disposed inside the detection groove (5); A spring (7) is provided on the outer wall of the judgment plate (6); Two semi-annular grooves (8) are symmetrically opened at the top of the lower mold (1) near the outer side of the cylinder (3); A three-phase motor (9) is fixed inside the lower mold (1) at a position directly below the cylinder (3); A turntable (10) fixed to the output end of the three-phase motor (9); Two infrared ranging sensors (11) are symmetrically arranged on the top of the turntable (10); The positioning rod (12) is fixed at the bottom of the upper mold (2) near the position directly above the positioning sleeve (4).

2. The positioning mechanism for a stamping die according to claim 1, characterized in that: The lower mold (1) has four guide sleeves (13) symmetrically arranged on its top. The upper mold (2) has guide posts (14) arranged at the bottom of the upper mold (2) near the top of the four guide posts (14). One end of the guide post (14) can be inserted into the inside of the guide sleeve (13). The lower mold (1) has a mold cavity on its top for stamping the lead frame. The upper mold (2) has a mold core on its bottom for stamping the lead frame.

3. The positioning mechanism for a stamping die according to claim 1, characterized in that: The inner wall of the positioning sleeve (4) and the outer wall of the positioning rod (12) fit together precisely.

4. The positioning mechanism for a stamping die according to claim 1, characterized in that: The cross-section of the judgment plate (6) is a "+" shaped structure. The inner sidewall of the detection groove (5) is provided with a groove on the outer side of the protruding part of the outer sidewall of the judgment plate (6). The spring (7) is located inside the groove.

5. A positioning mechanism for a stamping die according to claim 1, characterized in that: The infrared ranging sensor (11) passes through the semi-annular groove (8), and the infrared emitting end of the infrared ranging sensor (11) is located at the outer edge of the positioning sleeve (4).

6. A positioning mechanism for a stamping die according to claim 1, characterized in that: The lower mold (1) has an inner cavity on the outside of the three-phase motor (9) and the turntable (10).

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