Material supporting lever device

Abstract

The utility model discloses a material supporting lever device, which relates to the technical field of semiconductor lead frame stamping, and comprises a speed control connecting block which can be rotationally mounted on a lead frame horizontal feeding machine through a vertical frame or directly rotationally mounted on the lead frame horizontal feeding machine. A buffer rod and a counterweight swing rod are mounted on the speed control connecting block, and the buffer rod and the counterweight swing rod are arranged on the speed control connecting block in a crossed manner; the extension end of the counterweight swing rod is provided with at least one detachable counterweight block; a rotatable buffering roller structure is further installed at the extending end of the buffering rod. The device can be suitable for unwinding a special-shaped copper strip coil of a lead frame, overcomes the defects that the special-shaped copper strip twists at a buffer roller due to the fact that the special-shaped copper strip is thick and hard and the distance between the special-shaped copper strip and the buffer roller is too short and the special-shaped copper strip twists at the buffer roller, and overcomes the defects that a balance weight swing rod of an existing device cannot bear tensile force generated under high load and is broken, and the service life of the balance weight swing rod is influenced. And the emptying machine cannot work normally.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of semiconductor lead frame stamping, in particular to a material supporting lever device. BACKGROUND

[0002] The lead frame, as a chip carrier of integrated circuit, is a key structural member for realizing the electrical connection between the lead-out end of the internal circuit of the chip and the external lead by means of bonding material (gold wire, aluminum wire, copper wire), forming an electrical circuit, and serving as a bridge for connecting with external wires. Therefore, the lead frame is needed in most semiconductor integrated blocks and is an important basic material in the electronic information industry.

[0003] Currently, the production process of the lead frame mainly includes stamping and etching. In the stamping process, a material feeding machine is often used to unwind the copper strip coil material of the lead frame, which is then formed by stamping. The existing vertical material feeding machine can only unwind the small copper strip coil material, and can only unwind one copper strip, which cannot guarantee the continuity of production and is not convenient to load and unload. The existing disc horizontal material feeding machine can stack and place multiple coils of thin sheet material at the same time, but it is not suitable for unwinding the thick lead frame profiled copper strip coil material.

[0004] In the prior art, when the horizontal material feeding machine unwinds, the center axis of the strip material unwound by the horizontal material feeding machine is perpendicular to the center axis of the strip material entering the punch, and the strip material will be twisted on the buffer roll during the process of being sent out by the horizontal material feeding machine and entering the punch. However, due to the thickness of the profiled copper strip material, high hardness, poor toughness, and short distance from the buffer rod, it is difficult to twist 90°, and forced twisting will cause copper strip distortion. At the same time, the counterweight swing lever and speed control connecting block of the existing horizontal material feeding machine are connected by a threaded structure. When unwinding the lead frame profiled copper strip coil material, due to the thickness and weight of the material, it is difficult for the counterweight swing lever and the counterweight block to balance the tension in the copper strip transmission process, resulting in that the material feeding speed of the material feeding machine and the stamping speed of the punch are difficult to keep consistent. In addition, the counterweight swing lever will swing up and down with the connecting place with the speed control connecting block as the fulcrum. The metal fatigue generated by long-time swinging is concentrated at the threaded part, causing the threaded segment at the connecting place of the counterweight swing lever and the speed control connecting block to break, and the horizontal material feeding machine cannot work normally.

[0005] Therefore, a material supporting lever device capable of adjusting the material feeding angle and bearing high weight is needed to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model discloses a purpose lies in providing a kind of material supporting lever device, can be applicable to lead frame profiled copper strip coil material ground pay-off, overcome profiled copper strip because of material thickness, hard and with the distance between buffer roller is too short, twist copper strip at buffer roller and cause copper strip twist deformation defect, and the counterweight swing rod of existing equipment cannot bear the tension generated under high load, cause counterweight swing rod fracture, and the problem that material discharging machine cannot work normally.

[0007] To realize the utility model purpose, the technical scheme for adopting is as follows: a kind of material supporting lever device, including the speed control connecting block that can be installed or directly rotated on lead frame horizontal material discharging machine by stand rotation;Buffer rod and counterweight swing rod are installed on the speed control connecting block, and buffer rod and counterweight swing rod are arranged in cross on the speed control connecting block;At least one detachable counterweight block is installed at the extension end of the counterweight swing rod;Rotatable buffer roller structure is also installed at the extension end of the buffer rod.

[0008] Further, the counterweight swing rod vertically penetrates the speed control connecting block.

[0009] Further, the position of the counterweight block on the counterweight swing rod is adjustable.

[0010] Further, the counterweight block is also provided with adjusting screw that can abut against the counterweight swing rod.

[0011] Further, the upper end of the counterweight swing rod is fixed with the speed control connecting block.

[0012] Further, the extension length of the buffer rod on the speed control connecting block is adjustable.

[0013] Further, the speed control connecting block is also provided with locking bolt that can abut against the buffer rod.

[0014] Further, the buffer roller structure includes vertical cylinder and horizontal cylinder, and the vertical cylinder is rotatably installed on the vertical cylinder of the buffer rod, the horizontal cylinder is located at the lower end of the vertical cylinder and extends along the radial direction of the vertical cylinder, and the end shaft of the horizontal cylinder is fixedly installed on the buffer rod.

[0015] Further, the buffer roller structure also includes material blocking rod fixed on the buffer rod, and the material blocking rod is located at the upper end of the vertical cylinder and extends along the radial direction of the vertical cylinder.

[0016] The utility model discloses the beneficial effects are:

[0017] 1. By installing buffer roller structure on the buffer rod, avoid copper strip to twist 90 ° at buffer roller structure, make copper strip can be transferred to strip flattening equipment through twist operation, reduce the occurrence of copper strip twist deformation condition;At the same time, through buffer roller structure to high hardness copper strip rolling transmission, reduce the problem that copper strip side surface is contacted with cylinder and produces pad injury, scratch when copper strip moves, improve product quality.

[0018] 2. The problem of the breakage of the counterweight swing lever caused by the tension generated under the high load is solved by vertically penetrating the counterweight swing lever through the speed control connecting block. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and together with the description serve to explain the principles of the present application.

[0020] Figure 1 is the installation schematic view of the material supporting lever device provided by the present application;

[0021] Figure 2 is the sectional view of the material supporting lever device provided by the present application.

[0022] Markings in the drawings and corresponding names of parts:

[0023] 1 - horizontal material feeding machine stand; 2 - speed control connecting block; 3 - buffer lever; 4 - counterweight swing lever; 5 - counterweight block; 6 - adjusting bolt; 7 - buffer roller structure; 8 - locking bolt;

[0024] 2 - 71 - vertical roller; 72 - horizontal roller; 73 - material blocking lever. DETAILED DESCRIPTION

[0025] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related content, and not to limit the present application. In addition, it should be noted that only the parts related to the present application are shown in the drawings for the convenience of description.

[0026] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0027] As Figure 1 , Figure 2As shown in the utility model provide a kind of material supporting lever device, including speed control connecting block 2;When the device cooperates with lead frame horizontal material placing machine and uses, speed control connecting block 2 can be rotatably installed at the side top of lead frame horizontal material placing machine stand 1;When the device is used alone, speed control connecting block 2 can also be rotatably installed on a stand directly.The two through holes are not communicated, and the center axes of the two through holes are perpendicular, wherein a buffer rod 3 is installed through one of the through holes, and a counterweight swing rod 4 is installed through the other through hole, the installed buffer rod 3 and counterweight swing rod 4 are cross staggered, and the counterweight swing rod 4 and buffer rod 3 are extended downward;At least one counterweight 5 is installed at the extended end of the counterweight swing rod 4, the counterweight 5 is detachable on the counterweight swing rod 4, and the number and position of the counterweight 5 on the counterweight swing rod 4 can be adjusted according to actual conditions;The extended end of the buffer rod 3 is also provided with a buffer roller structure 7, which guides and lifts the copper strip, and the buffer roller structure 7 can rotate fully on the buffer rod 3, avoiding relative displacement between the copper strip and the buffer roller structure 7 when the copper strip passes through the buffer roller structure 7 for lifting and guiding, avoiding scratching of the copper strip, and ensuring the quality of the copper strip

[0028] In the utility model, the center axis for installing the counterweight swing rod 4 is consistent with the axis direction of the speed control connecting block 2, so that when the counterweight swing rod 4 is installed, the counterweight swing rod 4 penetrates the connecting block vertically, the problem of breakage of the counterweight swing rod 4 caused by the tension under high load is solved, and the service life of the counterweight swing rod 4 is longer.

[0029] In the utility model, the position of the counterweight 5 on the counterweight swing rod 4 can be adjusted, the gravity center of the device is adjusted through the adjustment of the counterweight 5, so that the inclination of the device is adjusted, and the buffer roller structure 7 can meet the transfer of the copper strip when the copper strip passes through the buffer roller structure 7 for transfer.

[0030] In the utility model, in order to facilitate the installation and disassembly of the counterweight 5, a through hole is formed in the counterweight 5, and the counterweight 5 is sleeved on the counterweight swing rod 4 through the through hole;Meanwhile, a threaded hole perpendicular to the through hole is formed in the counterweight 5, the threaded hole is communicated with the through hole, and an adjusting bolt 6 is installed in the threaded hole.When the adjusting bolt 6 advances in the threaded hole and abuts against the counterweight swing rod 4, the counterweight 5 is fixed on the counterweight swing rod 4;When the adjusting bolt 6 retreats in the threaded hole and moves away from the counterweight swing rod 4, the counterweight 5 can be directly taken off from the counterweight swing rod 4.

[0031] In the utility model, in order to the position of counterweight block 5 on counterweight swing lever 4 is adjustable and can be conveniently installed and disassembled, counterweight swing lever 4 can also directly select screw, and the threaded hole of screw thread cooperation on counterweight swing lever 4 is formed on counterweight block 5.When the position of counterweight block 5 needs to be adjusted, directly adjust and screw counterweight block 5 on counterweight swing lever 4, make counterweight block 5 move up and down on counterweight swing lever 4;When counterweight block 5 needs to be installed and disassembled, directly screw counterweight block 5 into counterweight swing lever 4 or screw out of counterweight swing lever 4, so that the adjustment, installation and disassembly of counterweight block 5 are more convenient.

[0032] In the utility model, in addition to the above two kinds of installation mode of counterweight block 5, when the through hole is formed on counterweight block 5, counterweight swing lever 4 can also directly select screw, at this time, directly set counterweight block 5 on counterweight swing lever 4, and after counterweight block 5 is completely set on counterweight swing lever 4 and is moved to the fixed position, screw a nut on counterweight swing lever 4, the nut can prevent counterweight block 5 set on counterweight swing lever 4 from falling off.When this mode is used and the position of counterweight block 5 on counterweight swing lever 4 needs to be ensured not to change, a nut can also be first installed on counterweight swing lever 4, then counterweight block 5 is set on counterweight swing lever 4, and another nut is screwed on counterweight swing lever 4, at this time, the displacement of counterweight block 5 on counterweight swing lever 4 is prevented by the cooperation of the two nuts.

[0033] In the utility model, in order to prevent counterweight swing lever 4 from separating from speed control connecting block 2, the upper end of counterweight swing lever 4 is fixed with speed control connecting block 2.In order to conveniently install and disassemble counterweight swing lever 4, after passing through speed control connecting block 2, counterweight swing lever 4 is locked and fixed with speed control connecting block 2 by nut;Of course, when the replacement and disassembly of counterweight swing lever 4 are not considered, speed control connecting block 2 can also be directly welded and fixed with counterweight swing lever 4.

[0034] In the utility model, in order to meet the height of lead frame material disc on lead frame horizontal material placing machine, the height of buffer roller structure 7 needs to be conveniently adjusted, therefore, the installation height of buffer rod 3 on speed control connecting block 2 can be adjusted in the utility model, and in order to conveniently adjust the installation height of counterweight swing lever 4, the extension length of buffer rod 3 on speed control connecting block 2 can be adjusted, so that the height adjustment of buffer roller structure 7 is more convenient.When the height of buffer roller structure 7 needs to be higher, buffer rod 3 is upwardly pumped and fixed on speed control connecting block 2;When the height of buffer roller structure 7 needs to be lower, buffer rod 3 is downwardly pumped and fixed on speed control connecting block 2.

[0035] In the utility model, in order to conveniently install and detach the buffer rod 3, threaded holes are formed on the speed control connecting block 2, the threaded holes are perpendicular to the through holes for the buffer rod 3 to penetrate, the threaded holes are communicated with the through holes for the buffer rod 3 to penetrate, and a locking bolt 8 is installed in the threaded hole.When the locking bolt 8 advances in the threaded hole and abuts against the buffer rod 3, the buffer rod 3 is fixed on the speed control connecting block 2; when the locking bolt 8 retreats in the threaded hole and is away from the buffer rod 3, the buffer rod 3 can move in the through hole for the buffer rod 3 to penetrate, and after the buffer rod 3 moves to the corresponding position, the locking bolt 8 is tightened again.

[0036] In the utility model, in order to conveniently adjust the buffer rod 3, when the buffer rod 3 is installed, the buffer rod 3 penetrates the speed control connecting block 2, the end of the buffer rod 3 penetrating the speed control connecting block 2 is provided with a thread, and a locking nut is installed on the end of the buffer rod 3 penetrating the speed control connecting block 2, after the buffer rod 3 penetrates the speed control connecting block 2, the locking nut is tightened, so that the buffer rod 3 and the speed control connecting block 2 are locked and fixed. In order to ensure the stability of the buffer rod 3 after installation, the locking nuts on the buffer rod 3 are two, and the two locking nuts are respectively located on the two sides of the speed control connecting block 2. When the buffer rod 3 needs to be adjusted, the locking nuts are loosened, the locking nuts are away from the speed control connecting block 2, then the position of the buffer rod 3 on the speed control connecting block 2 is adjusted, but after the buffer rod 3 is adjusted to the position, the locking nuts are tightened.

[0037] In the utility model, in order to conveniently hold and convey the copper strip, the buffer roller structure 7 comprises a vertical roller 71 which can rotate on the buffer rod 3, and in order to ensure that the vertical roller 71 can rotate fully, when the vertical roller 71 is installed, at least two bearings are first installed on the buffer rod 3, and the vertical roller 71 is sleeved on the bearings.

[0038] Since the copper strip coil is horizontally placed on the lead frame horizontal material placing machine, that is, the center of the copper strip coil and the center of the material disc of the lead frame horizontal material placing machine are located on the same straight line, therefore, in order to prevent the copper strip from directly separating from the vertical roller 71 due to its own gravity, the buffer roller structure 7 further comprises a horizontal roller 72, the horizontal roller 72 is located at the lower end of the vertical roller 71, the axis direction of the horizontal roller 72 is consistent with the radius direction of the vertical roller 71, and the horizontal roller 72 and the vertical roller 71 jointly form an L shape, so that the lower edge of the copper strip can be limited by the horizontal roller 72 in the process of advancing through the vertical roller 71; the horizontal roller 72 comprises a center shaft and a roller, the center shaft is fixed on the buffer rod 3, and the roller is rotatably sleeved on the center shaft; in the process of the copper strip advancing, when the horizontal roller 72 contacts the copper strip, the roller in the horizontal roller 72 can rotate with the advancing of the copper strip, so that the copper strip is prevented from being scratched in the advancing process.

[0039] In the utility model, in order to further guarantee that the copper band is always located on the vertical roller 71, the buffer roller structure 7 further includes a material blocking rod 73 fixed on the buffer rod 3, the material blocking rod 73 is parallel with the horizontal roller 72, and the material blocking rod 73 is located at the upper end of the vertical roller 71, that is, the material blocking rod 73 and the horizontal roller 72 are located at the two ends of the vertical roller 71 respectively, and the material blocking rod 73, the vertical roller 71 and the horizontal roller 72 are arranged in a U shape.Through the arrangement of the material blocking rod 73, the copper band can be effectively prevented from being separated from the vertical roller 71 due to upward swinging.

[0040] In the utility model, since the copper band does not swing upward in the processing process except for the failure of the processing production line, that is, the copper band does not contact the material blocking rod 73 in the normal processing of the copper band, therefore, the material blocking rod 73 does not scratch the copper band in the advancing process; of course, in order to completely avoid the copper band from being scratched, the material blocking rod 73 can also be directly replaced by the horizontal roller 72.

[0041] When the device needs to release the copper band, first, loosen the locking nut on the buffer rod 3, and pull out the buffer rod 3, so that the vertical roller at the lower end of the buffer rod 3 is adapted to the unwinding height of the copper band roll, then the copper band roll is unwound, and the vertical roller 71 lifts the copper band, and the lower edge of the copper band is arranged on the horizontal roller 72, in the copper band production process, the copper band automatically advances, and the vertical roller 71 and the horizontal roller 72 rotate synchronously with the copper band in the advancing process, thereby avoiding the copper band from being scratched.

[0042] It should be noted that the utility model is only used for preliminary lifting after the copper band roll is unwound, and the copper band will be lifted by other lifting structures after being lifted by the device and then enter the punch in the production line.

[0043] In the description of the present application, the description of the terms "one embodiment / way", "some embodiments / ways", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment / way or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments / ways or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments / ways or examples described in the present application and the characteristics of the different embodiments / ways or examples without contradiction.

[0044] In addition, the terms "first", "second", etc. are used only for descriptive purposes and not to connote or imply relative importance or an ordered sequence. Thus, a feature defined with "first", "second", etc. can include at least one of the features, explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0045] Those skilled in the art will understand that the above embodiments are only for the purpose of clearly illustrating the present application, and not for limiting the scope of the present application. Based on the above disclosure, other changes or modifications can also be made by those skilled in the art, and these changes or modifications are still within the scope of the present application.

Claims

1. A material supporting lever device characterized by comprising: The application relates to a speed control connecting block (2) which can be rotatably installed on a lead frame horizontal material placing machine through a stand or directly rotatably installed on the lead frame horizontal material placing machine; a buffer rod (3) and a counterweight swing rod (4) are installed on the speed control connecting block (2), the buffer rod (3) and the counterweight swing rod (4) are arranged in a cross mode on the speed control connecting block (2); at least one detachable counterweight block (5) is installed on the extension end of the counterweight swing rod (4); and a rotatable buffer roller structure (7) is further installed on the extension end of the buffer rod (3).

2. The material supporting lever device according to claim 1, characterized by The counterweight swing rod (4) vertically penetrates the speed control connecting block (2).

3. The material supporting lever device according to claim 1, characterized by The position of the counterweight block (5) on the counterweight swing rod (4) is adjustable.

4. The material supporting lever device according to claim 3, characterized by An adjusting screw which can abut against the counterweight swing rod (4) is further arranged on the counterweight block (5).

5. The material supporting lever device according to claim 1, characterized by The upper end of the counterweight swing rod (4) is fixed with the speed control connecting block (2).

6. The material supporting lever device according to claim 1, wherein The extension length of the buffer rod (3) on the speed control connecting block (2) is adjustable.

7. The material supporting lever device according to claim 6, characterized by A locking bolt (8) which can abut against the buffer rod (3) is further arranged on the speed control connecting block (2).

8. The material supporting lever device according to any one of claims 1 to 7, characterized by The buffer roller structure (7) comprises a vertical roller (71) and a horizontal roller (72), the vertical roller (71) is rotatably installed on the buffer rod (3), the horizontal roller (72) is located at the lower end of the vertical roller (71) and extends along the radial direction of the vertical roller (71), and the end shaft of the horizontal roller (72) is fixedly installed on the buffer rod (3).

9. The material supporting lever device according to claim 8, characterized by The buffer roller structure (7) further comprises a material blocking rod (73) which is fixed on the buffer rod (3) and located at the upper end of the vertical roller (71) and extends along the radial direction of the vertical roller (71). The buffer roller structure (7) further comprises a material blocking rod (73) which is fixed on the buffer rod (3) and located at the upper end of the vertical roller (71) and extends along the radial direction of the vertical roller (71).

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