T-shaped belt feeding guide device for lead frame stamping die
By introducing positioning rollers and lifting rollers into the stamping die, the problem of displacement of T-shaped copper strip during the stamping process was solved, achieving product quality stability and convenient feeding.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN JINWAN ELECTRONICS
- Filing Date
- 2025-05-19
- Publication Date
- 2026-04-24
AI Technical Summary
In stamping dies, T-shaped copper strips are prone to displacement during the stamping process, resulting in insufficient stamping accuracy and affecting product quality.
A T-strip feeding guide device for lead frame stamping die was designed, including a positioning roller and a lifting roller. The T-strip is positioned and pressed by the groove, inclined surface and protrusion on the positioning roller. Combined with the design of the limit seat and lifting roller block, the T-strip is stably guided and the feeding is convenient.
It effectively solves the problem of T-strip displacement within the mold, ensuring the precision and quality of stamped products, while also facilitating the loading operation of T-strips.
Smart Images
Figure CN224157644U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lead frame stamping technology, and in particular to a T-shaped belt feeding guide device for lead frame stamping die. Background Technology
[0002] As a chip carrier for integrated circuits, the leadframe is a key structural component that uses bonding materials (gold wire, aluminum wire, copper wire, etc.) to electrically connect the internal circuit leads of the chip to external leads, thereby forming an electrical circuit. The leadframe acts as a bridge connecting to external wires, and most semiconductor integrated circuits require the use of leadframes, making it an important basic material in the electronics and information industry.
[0003] There are two main manufacturing processes for leadframes: stamping and etching. In the stamping process, when the stamping die presses the copper strip used to make the leadframe, inaccurate placement of the copper strip on the lower die and the impact force on the lower die during die closing can cause the copper strip to shift, affecting the stamping accuracy of the leadframe. This results in products with insufficient precision and ultimately, defective products, impacting production quality. To solve this problem, current methods primarily involve setting a guiding and positioning mechanism on the lower die surface to guide and position the copper strip, thus preventing shifting.
[0004] However, for raw copper strips with a T-shaped cross-section, relying solely on the guiding and positioning mechanism within the mold will result in insufficient guiding force. Therefore, during the actual stamping and cutting process, the raw copper strip will still shift. Utility Model Content
[0005] The purpose of this invention is to provide a T-strip feeding guide device for lead frame stamping dies, which can guide the T-strip into the die during stamping and also solve the problem of horizontal displacement of the T-strip in the die during actual stamping and cutting.
[0006] The technical solution of this utility model to solve the above-mentioned technical problems is: a T-shaped strip feeding guide device for lead wire frame stamping die, including a fixed plate fixed below the lower die feed port, a guide plate with one end flush with the lower die feed port is horizontally fixed on the top of the fixed plate, a positioning roller that can move up and down and whose lower surface is in close contact with the upper surface of the T-shaped strip is horizontally arranged above the guide plate, and a lifting roller that can move up and down and whose upper surface passes through the guide plate and is in close contact with the lower surface of the T-shaped strip is horizontally arranged below the guide plate; the positioning roller and the lifting roller are arranged opposite each other vertically and their extension directions are both perpendicular to the guide path of the guide plate;
[0007] The positioning roller has a groove arranged around its axis on its outer wall in the middle. The side of the groove is an inclined surface that matches the outer side wall of the thick material part of the T-shaped belt. The positioning roller also has protrusions along the two sides of the groove on its outer wall for pressing the two sides of the T-shaped belt. The outer corners of the protrusions are arc-shaped chamfers.
[0008] As a further improvement of this utility model, the two sides of the material guiding path of the guide plate are provided with a first limiting seat and a second limiting seat, and the positioning roller and the lifting roller are movably installed between the first limiting seat and the second limiting seat. The upper ends of the first limiting seat and the second limiting seat are respectively connected to the two ends of a horizontally set limiting block.
[0009] As a further improvement of this utility model, the positioning roller is provided with a positioning roller limiting shaft that runs through the entire positioning roller along its axial direction, and the positioning roller and the positioning roller limiting shaft are rotatably connected by a positioning roller bearing set on the end face of the positioning roller.
[0010] As a further improvement of this utility model, both the first limiting seat and the second limiting seat are provided with a vertically extending through-hole A. The end of the positioning roller limiting shaft passes through the through-hole A and is movably installed in the through-hole A. The top of the through-hole A is provided with a vertically extending through-hole A, and a screw plug A is threadedly installed on the upper part of the through-hole A. The lower part of the through-hole A is vertically provided with a positioning roller return spring with both ends respectively in close contact with the screw plug A and the positioning roller limiting shaft.
[0011] As a further improvement of this utility model, lifting roller blocks are rotatably installed on the opposite sides of the first limiting seat and the second limiting seat, and the free ends of the two lifting roller blocks are connected by lifting roller handles. The upper surface of the lifting roller blocks is in contact with the positioning roller limiting shaft.
[0012] As a further improvement of this utility model, the lifting roller block provided on the first limiting seat is provided with a positioning mechanism for positioning the rotation angle of the lifting roller block on the side away from the first limiting seat.
[0013] As a further improvement of this utility model, the positioning mechanism includes a Z-shaped connecting block, one end of which is fixedly connected to the lifting roller block, and the other end is provided with a positioning pin extending in the same direction as the positioning roller. The first limiting seat is provided with a positioning hole for the positioning pin to be inserted.
[0014] As a further improvement of this utility model, a positioning pin return spring is sleeved on the positioning pin between the Z-shaped connecting block and the first limiting seat. One end of the positioning pin return spring abuts against the outer protruding ring on the positioning pin, and the other end abuts against the Z-shaped connecting block.
[0015] As a further improvement of this utility model, the lifting roller is provided with a lifting roller limiting shaft that runs through the entire lifting roller along its axial direction, and the lifting roller and the lifting roller limiting shaft are rotatably connected by a lifting roller bearing provided on the end face of the lifting roller.
[0016] As a further improvement of this utility model, both the first limiting seat and the second limiting seat are provided with a vertically extending through-hole B. The end of the lifting roller limiting shaft passes through the through-hole B and is movably installed in the through-hole B. The bottom of the through-hole B is provided with a vertically downward extending through-hole B, and a screw plug B is threadedly installed at the lower part of the through-hole B. The upper part of the through-hole B is vertically provided with a lifting roller return spring with both ends respectively in close contact with the screw plug B and the lifting roller limiting shaft.
[0017] Beneficial effects
[0018] Compared with the prior art, the advantages of the T-shaped belt feeding guide device for lead frame stamping die of this utility model are:
[0019] 1. This device, through the grooved slope and protrusion design on the positioning roller, achieves the positioning of the thick part of the T-strip and the pressing of the two sides of the T-strip, thereby solving the problem of the T-strip shifting in the mold during the actual stamping and cutting process, and thus ensuring product quality.
[0020] 2. After the positioning roller is lifted by the lifting roller block, the positioning pin of the positioning mechanism can automatically spring into the positioning hole on the side of the first limit seat, so that the positioning roller is lifted and positioned, making it easy to pass the T-belt through the middle of the positioning roller and the lifting roller, thus making the feeding convenient.
[0021] The present invention will become clearer from the following description and in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a front view structural diagram of the present invention;
[0024] Figure 2 This is a top view of the structure of this utility model;
[0025] Figure 3 This is a schematic diagram of the structure from the right side of this utility model;
[0026] Figure 4 This is a schematic diagram of the positioning roller in this utility model;
[0027] Figure 5 This is a schematic diagram of the positioning mechanism in this utility model.
[0028] Wherein: 1-lower mold; 2-guide plate; 3-fixed plate; 4-limiting block; 5-lifting roller; 6-lifting roller bearing; 7-lifting roller limiting shaft; 8-positioning roller; 9-positioning roller bearing; 10-positioning roller limiting shaft; 11-positioning roller return spring; 12-first limiting seat; 13-second limiting seat; 14-lifting roller block; 15-lifting roller handle; 16-positioning pin; 17-Z-type connecting block; 18-positioning pin return spring; 19-lifting roller positioning spring. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; of course, they can also refer to a mechanical connection or an electrical connection; furthermore, they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0031] Embodiments of the present invention will now be described with reference to the accompanying drawings.
[0032] Example:
[0033] The specific embodiments of this utility model are as follows: Figure 1-5As shown, a T-strip feeding guide device for a lead frame stamping die includes a fixing plate 3 fixed to the lower die 1 feed port by screws. A guide plate 2, with one end flush with the feed port of the lower die 1, is horizontally fixed to the top of the fixing plate 3 by screws. A positioning roller 8, movable vertically and with its lower surface in close contact with the upper surface of the T-strip, is horizontally positioned above the guide plate 2. A lifting roller 5, movable vertically and with its upper surface passing through the guide plate 2 and in close contact with the lower surface of the T-strip, is horizontally positioned below the guide plate 2. The positioning roller 8 and the lifting roller 5 are arranged vertically opposite each other, and their extension directions are perpendicular to the feeding path of the guide plate 2. When the T-strip is fed using this device, the T-strip is located between the positioning roller 8 and the lifting roller 5, and both the positioning roller 8 and the lifting roller 5 can rotate axially as the T-strip is fed.
[0034] The positioning roller 8 has a groove arranged around its axis on its outer wall. The sides of the groove are inclined surfaces that abut against the upper edge of the outer side wall of the thicker part of the T-strip; these inclined surfaces are polished. Simultaneously, the outer wall of the positioning roller 8 also has protrusions along the two sides of the groove for pressing the edges of the T-strip; the outer corners of these protrusions are rounded. This device positions the thicker part of the T-strip using the inclined surfaces of the groove on the positioning roller 8; and presses the edges of the T-strip using the protrusions on the sides of the groove. Therefore, this device solves the problem of T-strip displacement within the mold during actual stamping and cutting, thus ensuring product quality. Furthermore, the polished inclined surfaces of the groove on the positioning roller 8 and the rounded corners of the protrusions on the sides of the groove prevent scratches on the T-strip when it comes into contact with it.
[0035] In this device, for the installation of the positioning roller 8 and the lifting roller 5, the two sides of the material guide path of the guide plate 2 are connected by screws to the first limiting seat 12 and the second limiting seat 13. Both the positioning roller 8 and the lifting roller 5 are movably installed between the first limiting seat 12 and the second limiting seat 13. The upper ends of the first limiting seat 12 and the second limiting seat 13 are respectively connected to both ends of a horizontally set limiting block 4, increasing the stability of the entire device.
[0036] Specifically, regarding the rotational installation of the positioning roller 8: the positioning roller 8 is provided with a positioning roller limiting shaft 10 that runs through the entire positioning roller 8 along its axial direction, and the positioning roller 8 and the positioning roller limiting shaft 10 are rotatably connected by a positioning roller bearing 9 set on the end face of the positioning roller 8.
[0037] Meanwhile, to enable the positioning roller 8 to move vertically and maintain a certain pressure on the T-belt, both the first limiting seat 12 and the second limiting seat 13 in this embodiment are provided with vertically extending openings A. The end of the positioning roller limiting shaft 10 passes through the opening A and is movably installed in the opening A. In this embodiment, after the end of the positioning roller limiting shaft 10 passes through the opening A, a retaining spring is also provided on its end to prevent axial movement. The top of the opening A is provided with a vertically extending through hole A, and a screw plug A is threaded onto the upper part of the through hole A. The lower part of the through hole A is vertically provided with a positioning roller return spring 11, whose two ends are respectively in close contact with the screw plug A and the positioning roller limiting shaft 10. By rotating the adjusting screw plug A, the extension and retraction length of the positioning roller return spring 11 can be adjusted, thereby adjusting the pressure on the T-belt.
[0038] In this device, to facilitate lifting the positioning roller 8 for material feeding, roller lifting blocks 14 are rotatably mounted on the opposite sides of the first limiting seat 12 and the second limiting seat 13, and the free ends of the two roller lifting blocks 14 are connected by roller lifting handles 15. The upper surface of the roller lifting block 14 is in contact with the positioning roller limiting shaft 10. Operation is very convenient via the roller lifting handles 15.
[0039] Meanwhile, in order to position and lock the raised positioning roller 8, in this embodiment, the lifting roller block 14 provided on the first limiting seat 12 is provided with a positioning mechanism for positioning the rotation angle of the lifting roller block 14 on the side away from the first limiting seat 12. Specifically, the positioning mechanism includes a Z-shaped connecting block 17, one end of which is fixedly connected to the lifting roller block 14, and the other end is provided with a positioning pin 16 extending in the same direction as the positioning roller 8. The first limiting seat 12 is provided with a positioning hole for the positioning pin 16 to be inserted. A positioning pin return spring 18 is sleeved on the positioning pin 16 between the Z-shaped connecting block 17 and the first limiting seat 12. One end of the positioning pin return spring 18 abuts against the outer protruding ring on the positioning pin 16, and the other end abuts against the Z-shaped connecting block 17. After the positioning roller 8 is lifted by the lifting roller block 14, the positioning pin 16 of the positioning mechanism can automatically spring into the positioning hole on the side of the first limit seat 12, so that the positioning roller 8 is lifted and positioned, making it easy to pass the T-shaped belt through the middle of the positioning roller 8 and the lifting roller 5, thus making it convenient to feed materials.
[0040] In addition, regarding the rotational installation of the lifting roller 5: the lifting roller 5 is provided with a lifting roller limiting shaft 7 that runs through the entire lifting roller 5 along its axial direction, and the lifting roller 5 and the lifting roller limiting shaft 7 are rotatably connected by a lifting roller bearing 6 provided on the end face of the lifting roller 5.
[0041] Meanwhile, to enable the lifting roller 5 to move vertically and maintain a certain lifting force on the T-belt, both the first limiting seat 12 and the second limiting seat 13 are provided with vertically extending openings B. The end of the lifting roller limiting shaft 7 passes through the opening B and is installed vertically within the opening B. In this embodiment, after the end of the lifting roller limiting shaft 7 passes through the opening B, a retaining spring is also provided on its end to prevent axial movement. The bottom of the opening B is provided with a vertically downward extending through hole B, and a screw plug B is threaded onto the lower part of the through hole B. The upper part of the through hole B is vertically provided with a lifting roller return spring 19, whose two ends are respectively in close contact with the screw plug B and the lifting roller limiting shaft 7. By rotating the adjusting screw plug B, the extension and retraction length of the lifting roller return spring 19 can be adjusted, thereby adjusting the lifting force on the T-belt.
[0042] The working principle of this device is as follows:
[0043] In use, press down the limiting block 4 with one hand and hold the lifting roller handle 15 with the other hand. As the lifting roller handle 15 is lifted upwards, the upward movement of the lifting roller block 14 applies an upward pulling force to the positioning roller limiting shaft 10, causing the positioning roller limiting shaft 10 to move upwards along the openings A and B on the first limiting seat 12 and the second limiting seat 13. At this time, the positioning roller return spring 11 is compressed until the positioning pin 16 automatically springs into the positioning hole on the outside of the first limiting seat 12, and the positioning roller 8 is lifted and fixed.
[0044] Then, the T-strip, with its raised side facing upwards, is inserted into the mold through the gap between the positioning roller 8 and the lifting roller 5. The positioning pin 16 is then pulled outwards, disengaging from the positioning hole on the outer side of the first limiting seat 12. The positioning roller 8 returns to its initial position under the elastic force of the positioning roller return spring 11. At this point, the T-strip is clamped by the positioning roller 8 and the lifting roller 5, and its groove side contacts the side walls of the thicker portion of the T-strip. The protrusions on both sides of the groove press the T-strip firmly, solving the problem of the T-strip shifting within the mold during the actual stamping and cutting process.
[0045] The present invention has been described above in conjunction with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations made in accordance with the essence of the present invention.
Claims
1. A T-shaped strip feeding guide for lead frame stamping die, comprising a fixed plate (3) fixed below the feeding port of a lower die (1), a top of the fixed plate (3) horizontally fixed with a guide plate (2) with one end flush with the feeding port of the lower die (1), characterized in that, Above the guide plate (2) is a horizontally positioned rotating roller (8) that can move up and down and whose lower surface is in close contact with the upper surface of the T-shaped belt. Below the guide plate (2) is a horizontally positioned lifting rotating roller (5) that can move up and down and whose upper surface passes through the guide plate (2) and is in close contact with the lower surface of the T-shaped belt. The positioning rotating roller (8) and the lifting rotating roller (5) are arranged opposite each other, and the extension direction of both is perpendicular to the guide path of the guide plate (2). The positioning roller (8) has a groove arranged around its axis on the outer wall of the middle part. The side of the groove is an inclined surface that matches the outer side wall of the thick material part of the T-shaped belt. The positioning roller (8) also has protrusions along the two sides of the groove on the outer wall for pressing the two sides of the T-shaped belt. The outer corner of the protrusion is an arc chamfer.
2. The T-shaped tape feed guide for a lead frame stamping die according to claim 1, wherein The guide plate (2) has a first limiting seat (12) and a second limiting seat (13) on both sides of the material guiding path. The positioning roller (8) and the lifting roller (5) are movably installed between the first limiting seat (12) and the second limiting seat (13). The upper ends of the first limiting seat (12) and the second limiting seat (13) are respectively connected to the two ends of a horizontally set limiting block (4).
3. The T-shaped tape feed guide for a lead frame stamping die according to claim 2, wherein The positioning roller (8) is provided with a positioning roller limiting shaft (10) that runs through the entire positioning roller (8) along its axial direction, and the positioning roller (8) and the positioning roller limiting shaft (10) are rotatably connected by a positioning roller bearing (9) set on the end face of the positioning roller (8).
4. The T-shaped tape feed guide for a lead frame stamping die according to claim 3, wherein The first limiting seat (12) and the second limiting seat (13) are both provided with vertically extending through-holes A. The end of the positioning roller limiting shaft (10) passes through the through-hole A and is installed in the through-hole A in a vertically movable manner. The top of the through-hole A is provided with a vertically extending through-hole A, and a screw plug A is threadedly installed on the upper part of the through-hole A. The lower part of the through-hole A is vertically provided with a positioning roller return spring (11) whose two ends are respectively in close contact with the screw plug A and the positioning roller limiting shaft (10).
5. The T-shaped tape feed guide for a lead frame stamping die according to claim 4, wherein The first limiting seat (12) and the second limiting seat (13) are rotatably mounted with lifting roller blocks (14) on opposite sides, and the free ends of the two lifting roller blocks (14) are connected by lifting roller handles (15). The upper surface of the lifting roller block (14) is in contact with the positioning roller limiting shaft (10).
6. The T-shaped tape feed guide for lead frame stamping dies according to claim 5, wherein The lifting roller block (14) set on the first limiting seat (12) has a positioning mechanism on the side away from the first limiting seat (12) for positioning the rotation angle of the lifting roller block (14).
7. The T-shaped tape feed guide for lead frame stamping dies according to claim 6, wherein The positioning mechanism includes a Z-shaped connecting block (17), one end of which is fixedly connected to the lifting roller block (14), and the other end is provided with a positioning pin (16) extending in the same direction as the positioning roller (8). The first limiting seat (12) is provided with a positioning hole for the positioning pin (16) to be inserted.
8. The T-shaped tape feed guide for lead frame stamping dies according to claim 7, wherein A positioning pin return spring (18) is sleeved on the positioning pin (16) between the Z-shaped connecting block (17) and the first limiting seat (12). One end of the positioning pin return spring (18) abuts against the outer protruding ring on the positioning pin (16), and the other end abuts against the Z-shaped connecting block (17).
9. The T-shaped tape feed guide for lead frame stamping dies according to any one of claims 2 to 8, characterized by, The lifting roller (5) is provided with a lifting roller limiting shaft (7) that runs through the entire lifting roller (5) along its axial direction, and the lifting roller (5) and the lifting roller limiting shaft (7) are rotatably connected by a lifting roller bearing (6) set on the end face of the lifting roller (5).
10. The T-shaped tape feed guide for lead frame stamping dies according to claim 9, wherein The first limiting seat (12) and the second limiting seat (13) are both provided with vertically extending through-holes B. The end of the lifting roller limiting shaft (7) passes through the through-hole B and is installed in the through-hole B in a vertically movable manner. The bottom of the through-hole B is provided with a vertically downward extending through-hole B, and a screw plug B is threadedly installed at the lower part of the through-hole B. The upper part of the through-hole B is vertically provided with a lifting roller return spring (19) with both ends abutting against the screw plug B and the lifting roller limiting shaft (7) respectively.