CN113305203B

CN113305203B - Method for processing FFC with fuse structure

Info

Publication number: CN113305203B
Application number: CN202110617764.5A
Authority: CN
Inventors: 刘文红
Original assignee: Shenzhen Wenxin Electronic Co ltd
Current assignee: Shenzhen Wenxin Electronic Co ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2023-01-06
Anticipated expiration: 2041-06-03
Also published as: CN113305203A

Abstract

The invention belongs to the technical field of FFCs, and particularly relates to a processing method of an FFC with a fuse structure, which comprises the following steps: preparing a plurality of conductor rolls; (2) Preparing punching cutters with corresponding quantity according to the quantity of conductor coils needing punching; (3) preparing two rolls of flexible insulating sheets according to requirements; (4) Preparing punching dies with corresponding quantity according to the quantity of conductor coils needing punching; (5) Starting a stamping device, and punching a first through hole and a second through hole on a metal strip, wherein the first through hole and the second through hole are separated by a strip-shaped metal plate; (6) The thread combining procedure is carried out to obtain a plurality of connected FFCs; (7) Starting the punching device, and punching a first notch and a second notch on the punched metal strip; and (8) a stripping process to obtain a plurality of FFC finished products. The invention has simple process, can adopt automatic equipment and standard dies for batch processing, and is beneficial to greatly improving the yield of the FFC.

Description

Method for processing FFC with fuse structure

Technical Field

The invention relates to the technical field of FFC (flexible flat cable) processing, in particular to a processing method of an FFC with a fuse structure for a new energy automobile.

Background

The FFC is a Flexible Flat Cable, which is an abbreviation of a Flexible Flat Cable and is commonly used on electronic products, the conventional FFC consists of two layers of insulating films and a conductor layer arranged between the two layers of insulating films, a fuse does not need to be arranged when the FFC is used on the electronic products, but the problem of the fuse needs to be solved when the FFC is applied to the fields of new energy automobiles and the like.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a method for processing an FFC with a fuse structure, and aims to solve the problem of low yield of the existing FFC with the fuse structure in the processing process.

In order to realize the purpose, the invention adopts the technical scheme that: a processing method of an FFC with a fuse structure comprises the following steps:

(1) Preparing a plurality of conductor rolls according to requirements, wherein each conductor roll is composed of n metal strips, each conductor roll is arranged on a stamping device of a wire-combining machine, and n is an integer larger than 3;

(2) Preparing punching dies, and installing a corresponding number of punching cutters on the punching dies according to the number of conductor coils needing punching, wherein each group of punching cutters comprises a front punching cutter and a rear punching cutter which are arranged in front and at the back, and the punching dies are installed on a punching device of a wire doubling machine and are positioned above a workbench of the punching device;

(3) Preparing two rolls of flexible insulating sheets according to requirements, and installing the two rolls of flexible insulating sheets on a wire combining device which is positioned below the punching device and is arranged on a wire combining machine;

(4) Preparing a punching die, mounting a plurality of groups of punching tools on the punching die, wherein each group of punching tools comprises two punching tools, and mounting the punching die on a punching device which is positioned at the next station of the wire combining device and is fixedly arranged on the wire combining machine so as to be positioned above a workbench of the punching device;

(5) Starting a punching device, enabling metal strips on a plurality of coiled conductors to sequentially pass through a workbench of the punching device, starting a group of punching tools when a first metal strip and a second metal strip of a conductor coil to be punched pass through the lower part of a group of punching tools corresponding to the metal strips, respectively punching a first through hole on the first metal strip and a second metal strip by a front punching tool and a rear punching tool on the group of punching tools, and then resetting the group of punching tools; when the second metal strip and the third metal strip respectively reach the positions below the front punching cutter and the rear punching cutter, the group of punching cutters are started again, a second through hole positioned on one side of the first through hole is punched in the second metal strip, and a first through hole is punched in the third metal strip; the metal strip on the conductor roll continues to advance until a first perforation and a second perforation are punched on the second metal strip to the (n-1) th metal strip of the conductor roll; the first through hole and the second through hole are separated by a strip-shaped metal plate;

(6) The metal strips enter a wire combining device, the wire combining device is started, two rolls of insulating sheets are respectively pressed on two surfaces of the metal strips of the conductor rolls, the metal strips are connected together to form a conductor layer of the FFC, and a plurality of connected FFCs are obtained;

(7) Sequentially enabling the FFCs obtained in the step (6) to pass through a workbench of a punching device, starting the punching device, and when the metal strips with the first through holes and the second through holes in the FFCs pass below the corresponding punching cutters, starting the punching cutters to punch first notches and second notches for breaking the outer side plates on the outer side plates of the first through holes and the second through holes of the metal strips respectively;

(8) And (5) dividing the plurality of connected FFCs obtained in the step (6) into strips to obtain a plurality of FFC finished products with fuse structures.

Preferably, in step (4), the number of punching cutters is the same as that of punching cutters.

Preferably, in step (1), a separation line is provided at the joint of two adjacent metal strips on each conductor coil.

Preferably, in step (2), the transverse spacing between the front and rear punching knives is 0.1mm.

Preferably, in step (4), the two punching knives have a transverse spacing of 0.7mm.

Preferably, in the step (6), the insulating sheet is an adhesive film; the pressing temperature is 170 ℃, the advancing speed of the metal strip and the insulating film is 1m/min, and the pressure is 0.3Mpa.

The beneficial technical effects are as follows: by adopting the processing method, firstly, a plurality of conductor rolls are prepared according to the specification of the FFC, a punching die and a punching die are prepared according to the requirement, and two rolls of flexible insulating sheets are prepared; each conductor roll is composed of a plurality of metal strips, and in order to facilitate subsequent identification and strip division, a dividing line is arranged at the joint of two adjacent metal strips; the punching die is arranged on the punching device, the punching die and the wire-combining device are arranged on a wire-combining machine, and the wire-combining machine is automatic equipment; when the metal strip on the conductor coil reaches the lower part of the punching die, a first through hole and a second through hole are punched on the metal strip needing punching in sequence by a front punching knife and a rear punching knife, and the first through hole and the second through hole are separated by a strip-shaped metal plate; and then conveying a plurality of connected FFCs obtained by a wire combining procedure of a wire combining machine to a workbench of a punching device, and punching the outer side plates of a first through hole and a second through hole of a metal strip on each FFC by two punching knives respectively, wherein the metal strip needing to be punched on each FFC is divided into two sections, and the two sections are connected together by a strip metal plate, the width of the strip metal plate is greatly reduced relative to the width of the metal strip, and if the current exceeds a set current in the using process, the strip metal plate is fused, so that the strip metal plate has the function of a fuse.

Drawings

FIG. 1 is a schematic diagram of a metal strip with a first through hole and a second through hole according to an embodiment of the present invention;

FIG. 2 is a schematic view of an FFC according to an embodiment of the present invention;

FIG. 3 is a schematic view of a punching die according to an embodiment of the present invention;

FIG. 4 is a schematic view of a piercing die according to an embodiment of the present invention;

FIG. 5A is a diagram illustrating the effect of the first punching process according to the embodiment of the present invention;

FIG. 5B is a diagram illustrating the effect of the second punching operation according to the embodiment of the present invention;

fig. 5C is a diagram illustrating the effect of the third punching process according to the embodiment of the present invention.

Detailed Description

In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments.

The embodiment of the invention provides a method for processing an FFC with a fuse structure, which comprises the following steps:

(5) Starting a punching device, enabling metal strips on a plurality of coiled conductors to sequentially pass through a workbench of the punching device, starting a group of punching tools when a first metal strip and a second metal strip of a conductor coil to be punched pass through the lower part of a group of punching tools corresponding to the metal strips, respectively punching a first through hole on the first metal strip and a second metal strip by a front punching tool and a rear punching tool on the group of punching tools, and then resetting the group of punching tools; when a second metal strip and a third metal strip respectively reach the positions below the front punching cutter and the rear punching cutter, the group of punching cutters are started again, a second through hole positioned on one side of the first through hole is punched on the second metal strip, and a first through hole is punched on the third metal strip; the metal strips on the conductor coil continue to advance until a first perforation and a second perforation are punched on the second metal strip to the (n-1) th metal strip of the conductor coil; the first through hole and the second through hole are separated by a strip-shaped metal plate;

In step (1), what is called as required means that the number of metal strips constituting the conductor layer is different for different FFCs due to different specifications, and as shown in fig. 2, each FFC of the present embodiment includes five metal strips 1, that is, n =5, and in producing such an FFC, five conductor coils need to be prepared and installed on a punching device of a wire-stranding machine before processing. Each conductor roll is made by winding a strip-shaped metal foil, and after the wire-combining process is finished, the conductor roll needs to be divided into a plurality of FFC finished products through a strip dividing process, so that a dividing line is arranged at the joint of two adjacent metal strips on each conductor roll for the convenience of identification and strip dividing processing of subsequent processes.

As for the step (2), since fuses do not need to be arranged on each metal strip forming the FFC, before processing, punching dies need to be prepared according to the number of the metal strips on which the fuses are arranged, and since two holes need to be processed, each group of punching dies includes front punching knives and rear punching knives arranged in front and rear, as shown in fig. 2, fuse structures need to be arranged on five metal strips 1 of the FFC of the present embodiment, and thus, five groups of punching dies need to be prepared; as shown in fig. 1, the transverse distance between the first through hole and the second through hole is 0.1mm, and correspondingly, the transverse distance between the front punching knife and the rear punching knife processed by the punching die is 0.1mm.

And (4) according to the step (4), the number of the punching dies is consistent with that of the punching dies, because the punched metal strips need to be punched, and the transverse distance between the two punching knives is 0.7mm.

In step (5), the metal strips on different conductor rolls, whether or not punching is needed, are subjected to a wire-combining process of the next station through the punching device, namely, in the step, the metal strips passing through the punching device comprise the metal strips needing punching and the metal strips without punching.

In the step (6), the insulating sheet is a glue film; the laminating temperature is 170 ℃, the advancing speed of the metal strip and the insulating film is 1m/min, and the pressure is 0.3Mpa.

Examples

The present embodiment provides a method for processing an FFC with a fuse structure, which takes processing an FFC including five metal strips (i.e., a 5pin FFC) as an example, and includes the following steps:

(1) Preparing five conductor rolls according to requirements, wherein each conductor roll consists of a plurality of metal strips, each conductor roll is arranged on a stamping device of a wire-combining machine, and a parting line 3 is arranged at the joint of two adjacent metal strips on each conductor roll; as shown in FIG. 1;

(2) Preparing a punching die 4, mounting five groups of punching cutters 5 on the punching die according to the number of conductor coils needing punching, wherein each group of punching cutters comprises a front punching cutter 501 and a rear punching cutter 502 which are arranged in front and at back, and mounting the punching die 4 on a punching device of a wire combining machine to enable the punching die to be positioned above a workbench of the punching device; a schematic view of the punch 4 is shown in figure 3;

(3) Preparing two rolls of flexible insulating sheets, and mounting the two rolls of flexible insulating sheets on a wire combining device which is positioned at a station below the punching device and is arranged on a wire combining machine;

(4) Preparing a punching die 6, mounting five groups of punching tools 7 on the punching die, wherein each group of punching tools comprises two punching cutters, and mounting the punching die 6 on a punching device which is positioned at the next station of the wire combining device and is fixedly arranged on the wire combining machine so as to be positioned above a workbench of the punching device; a schematic view of the blanking die 6 is shown in fig. 4;

(5) A punching process, namely starting a punching device, enabling the metal strips 1 on the five coils of conductors to sequentially pass through a workbench of the punching device, starting the group of punching tools 5 when a first metal strip and a second metal strip of each conductor coil pass below the corresponding group of punching tools, and respectively punching first through holes 101 on the first metal strip and the second metal strip by a front punching tool 501 and a rear punching tool 502 on the group of punching tools, wherein the punching results are shown in fig. 5A; then, the group of punching cutters is reset; when the second and third metal strips reach the positions below the front and

rear punching blades

501 and 502, respectively, the punching blades are started again to punch the second through hole 102 on one side of the first through hole 101 in the second metal strip and simultaneously punch the first through hole 101 in the third metal strip, and the punching result is shown in fig. 5B; the metal strip on the conductor coil continues to advance until the first perforation 101 and the second perforation 102 are punched on the second metal strip to the (n-1) th metal strip of the conductor coil; the first through hole and the second through hole are separated by a strip-shaped metal plate 2; by adopting the processing mode, two adjacent metal strips can be punched simultaneously, so that the processing efficiency is improved; because only the first through hole 101 can be punched on the first metal strip and the nth metal strip, the first metal strip and the nth metal strip need to be discarded, the mode is adopted for punching, the processing efficiency is improved, and the materials are fully utilized; of course, more than three metal strips can be punched simultaneously, so that the machining efficiency is higher, but the die structure is more complex, and more materials need to be discarded; the transverse distance between the first through hole 101 and the second through hole 102 is 0.1mm, namely the width of the strip-shaped metal plate is 0.1mm; as shown in fig. 1; correspondingly, the transverse distance between the front punching cutter and the rear punching cutter is 0.1mm;

(6) The metal strip is fed into a wire combining device, the wire combining device is started, two rolls of insulating sheets are respectively pressed on two surfaces of the metal strips of the conductor rolls, and the metal strips are connected together to form a conductor layer of the FFC, so that a plurality of connected FFCs are obtained; in the process, a plurality of FFCs are connected with each other; the laminating temperature is 170 ℃, the advancing speed of the metal strip and the insulating film is 1m/min, and the pressure is 0.3Mpa;

(7) Sequentially enabling the FFCs obtained in the step (6) to pass through a workbench of a punching device, starting the punching device, and when the metal strips with the first through holes and the second through holes in the FFCs pass below the corresponding punching cutters 7, starting the punching cutters 7 to punch a first notch 103 and a second notch 104 for breaking an outer side plate on the outer side plates of the first through hole 101 and the second through hole 102 of the metal strips respectively; as shown in fig. 2, the transverse distance between the first notch 103 and the second notch 104 is 0.7mm, and the transverse distance between the two punching blades is 0.7mm.

(8) And (4) dividing the plurality of connected FFCs obtained in the step (6) into strips to obtain a plurality of FFC finished products with fuse structures.

The present embodiment is described in detail by taking an example of processing an FFC including five metal PINs, and a person skilled in the art can easily think of a method for processing an FFC including other numbers of metal PINs in conjunction with the present embodiment, and will not be described separately here.

In summary, according to the processing method of the present invention, five conductor rolls are prepared according to the specification of the FFC, a punching die and a punching die are prepared as required, and two rolls of flexible insulating sheets are prepared; each conductor roll is composed of a plurality of metal strips, and in order to facilitate subsequent identification and strip division, a dividing line is arranged at the joint of two adjacent metal strips; the punching die is arranged on the punching device, the punching device and the punching device are arranged on the wire-combining machine, and the wire-combining machine is automatic equipment; when the metal strip on the conductor coil reaches the position below the punching die, a front punching knife 501 and a rear punching knife 502 sequentially punch a first through hole 101 and a second through hole 102 on the metal strip needing punching, and the first through hole 101 and the second through hole 102 are separated by a strip-shaped metal plate 2; and then, a plurality of connected FFCs obtained by a thread-combining process of a thread-combining machine are transmitted to a workbench of a punching device, the outer side plates of the first through hole 101 and the second through hole 102 on each FFC are punched by two punching knives respectively, at the moment, the metal strip needing to be punched on each FFC is divided into two sections, the two sections are connected together through a strip-shaped metal plate 2, the width of the strip-shaped metal plate 2 is greatly reduced relative to the width of the metal strip 1, and in the using process, if the current exceeds the set current, the strip-shaped metal plate is fused, so that the strip-shaped metal plate has the function of a fuse.

In the above description, it should be noted that the terms "mounted," "connected," and the like are used in a broad sense, and for example, they may be fixedly connected, detachably connected, or integrally connected; the connection may be direct or indirect via an intermediate medium, and the connection may be internal to the two components.

It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention without limiting its scope. This invention may be embodied in many different forms and the embodiments are provided so that this disclosure will be thorough and complete. All equivalent structures made by using the contents of the specification and the attached drawings of the invention can be directly or indirectly applied to other related technical fields, and are also within the protection scope of the patent of the invention.

Claims

1. A processing method of an FFC with a fuse structure is characterized by comprising the following steps:

(2) Preparing punching dies, installing a corresponding number of punching cutters on the punching dies according to the number of conductor coils needing punching, wherein each group of punching cutters comprises a front punching cutter and a rear punching cutter which are arranged in front and at back, and installing the punching dies on a punching device of a wire combining machine to enable the punching dies to be positioned above a workbench of the punching device;

(3) Preparing two rolls of flexible insulating sheets according to requirements, and installing the two rolls of flexible insulating sheets on a wire combining device which is positioned at the next station of the punching device and is arranged on a wire combining machine;

(5) Starting a punching device, enabling metal strips on a plurality of conductor coils to sequentially pass through a workbench of the punching device, starting a group of punching tools when a first metal strip and a second metal strip of the conductor coil to be punched pass through the lower part of the group of punching tools corresponding to the first metal strip and the second metal strip, respectively punching first through holes on the first metal strip and the second metal strip by a front punching tool and a rear punching tool on the group of punching tools, and then resetting the group of punching tools; when the second metal strip and the third metal strip respectively reach the positions below the front punching cutter and the rear punching cutter, the group of punching cutters are started again, a second through hole positioned on one side of the first through hole is punched in the second metal strip, and a first through hole is punched in the third metal strip; the metal strips on the conductor coil continue to advance until a first perforation and a second perforation are punched on the second metal strip to the (n-1) th metal strip of the conductor coil; the first through hole and the second through hole are separated by a strip-shaped metal plate;

(6) The metal strips enter a wire combining device, the wire combining device is started, two rolls of flexible insulating sheets are respectively pressed on two surfaces of the metal strips of the conductor rolls, and the metal strips are connected together to form a conductor layer of the FFC, so that a plurality of connected FFCs are obtained;

(8) And dividing the obtained FFC connected together to obtain a plurality of FFC finished products with fuse structures.

2. The FFC with fuse structure of claim 1, wherein in step (4), the number of punching tools is the same as the number of punching tools.

3. The method of claim 2, wherein in step (1), a dividing line is provided at the joint of two adjacent metal strips on each conductor coil.

4. The method of claim 3, wherein in the step (2), the transverse distance between the front punching knife and the rear punching knife is 0.1mm.

5. The method for manufacturing an FFC with a fuse structure according to claim 4, wherein in the step (4), the transverse distance between the two punching blades is 0.7mm.

6. The method for processing an FFC with a fuse structure according to claim 5, wherein in the step (6), the flexible insulating sheet is an adhesive film; the pressing temperature is 170 ℃, the advancing speed of the metal strip and the flexible insulating sheet is 1m/min, and the pressure is 0.3Mpa.