CN115318973A - Universal axial component lead secondary forming device and forming method - Google Patents

Abstract

The invention provides a secondary molding device and a molding method for a lead wire of a general axial component, comprising a tooling base, a left positioning block, a right positioning block, a left clamping block, a right clamping block, a cover plate, a scraper, and a fastener . The invention realizes the secondary molding of the axial device leads, has the characteristics of high-precision molding control and the flatness of the bottom surface of the leads, and changes the past that the axial device leads are once molded and then manually molded, which is prone to lead molding size deviation, component leads. The root is stressed and the forming state is different. Through the cooperation of the positioning block and the tooling base, the component lead forming part during the secondary forming process of the axial device lead can be controlled to be at least 2 times the lead diameter from the body root or the welding point to meet the requirements of the process. It can be used as a forming tool, which greatly saves the time for forming the size of the component leads, and also realizes the process quantification index of the secondary forming of the axial component leads.

Description

A general-purpose axial component lead secondary molding device and molding method

technical field

The invention relates to the technical field of electronic assembly, in particular to a secondary forming device and forming method for a universal axial component lead.

Background technique

In the module electronic assembly process of the power control unit, a large number of in-line resistors, in-line diodes and other devices are used. However, due to the limited space design of the control unit, some in-line resistors and capacitor leads need to be secondary molded before they can be used. Secondary bending by manual hand-held vise, tweezers, etc. will easily cause force on the root of the lead, which will lead to cracks at the root of the lead of the in-line resistor and capacitor; because the forming angle and forming quality vary from person to person, it is difficult to control. The product consistency is poor, the body is raised inconsistently, the body and the lead are not on the same plane, and the efficiency is low.

Contents of the invention

The purpose of the present invention is to provide a universal axial component lead overmolding device and molding method to solve the problems of inconsistency in raising the device body, the body and the lead are not on the same plane, and the lead is damaged during the secondary molding of the axial component lead. hidden dangers etc.

In order to solve the above-mentioned technical problems, the technical solution of the present invention is to provide a secondary molding device for universal axial component leads, including a tooling base, a left positioning block, a right positioning block, a left clamping block, a right clamping block, a cover Plates, scrapers, fasteners;

The tooling base is used for the overall counterweight, the left clamping block is integrally fixed on the left side of the tooling base, and the right clamping block is integrally fixed on the right side of the tooling base; the tooling base boss The width is consistent with the body length of the universal axial component;

Both the left positioning block and the right positioning block body are provided with a groove and two positioning pins; the width of the groove is the outer diameter of the component lead, and the depth is 1/2 of the outer diameter of the component lead;

The left clamping block body is provided with two fastener mounting holes and two guide grooves, and the right clamping block body is also provided with two fastener mounting holes and two guide grooves; The firmware installation hole is used to ensure the fastening of the clamping block and the tooling base. The upper part of the guide groove is S-shaped, and the lower part is a straight section; the size of the S-shaped groove matches the width of the groove of the positioning block, ensuring During the forming process of the component lead, it adapts to the guide groove, and the bending radius of the lead forming size meets the requirements of the secondary forming standard; the size of the straight section groove is consistent with the size of the S-shaped groove, ensuring that the secondary The lead wires on the left and right sides of the formed component are on the same plane, and the flatness is good;

The groove size of the cover plate is consistent with the size of the positioning pin of the positioning block, and the positioning pin is used to ensure that the cover plate and the positioning block are relatively fixed during the secondary molding process of the axial device lead;

The front end of the scraper is rounded, and the bending radius is consistent with the width of the groove of the positioning block. During the secondary molding process of the axial device lead, it provides an external force for forming the lead.

Further, the tooling base is used to ensure that the clamping block remains fixed during the secondary molding process of the axial device lead, and ensures that the lead forming direction matches the positioning groove in the clamping block during the secondary molding process of the axial device lead. Guarantee the forming accuracy of the leads, and the flatness of the components and the leads.

Further, the depth of the groove on the body of the left positioning block and the right positioning block is 1/2 of the outer diameter of the lead wire. When placed in this area, the upper cover plate presses the component leads, and this area can form an interference fit to prevent the components from rotating; the thickness of the left positioning block and the right positioning block body is controlled to meet the requirements of the component leads after secondary molding The distance from the forming part to the root of the body or the welding point is at least 2 times the diameter of the lead wire of the component.

Further, the front end of the squeegee is rounded, which can effectively prevent damage to the leads of components during the process of applying forming force by the squeegee.

Further, the parameters of the boss width of the tooling base, the thickness of the positioning block body, the groove width of the positioning block body, the groove depth, the S-shaped guide groove of the clamping block, and the straight section guide groove can be adjusted according to different models and specifications of the component leads. Personalized and precise design of the diameter, to ensure that the size requirements of various axial device leads after forming the lead meet the standard requirements, and can be used as a follow-up single-variety large-volume component axial device lead secondary molding.

Another technical solution of the present invention provides a molding method using the above-mentioned universal axial component lead secondary molding device, including the following steps:

S1. Put the axial device on the tooling base;

S2. Select the left positioning block and the right positioning block of the same thickness required by the corresponding shoulder width and place them on both sides of the boss of the tooling base;

S3. Select the left clamping block and the right clamping block of the S-shaped guide groove matched with the secondary molding of the axial device lead and place them on the outside of the left positioning block and the right positioning block respectively;

S4. Use fasteners to fasten the left positioning block, left clamping block, tooling base, right positioning block, right clamping block, and tooling base;

S5. After positioning the positioning hole of the cover plate and the positioning pins on the left positioning block and the right positioning block, install it;

S6. Install the cover plate so that the bottom surface of the cover plate and the left positioning block and the right positioning block clamp the left and right leads of the axial components respectively, and use the scraper to place the components along the guide grooves of the left clamping block and the right clamping block respectively. The leads at the left and right ends are subjected to secondary molding;

S7. Take out the cover plate along the positioning pins of the left positioning block and the right positioning block, and then take out the components after secondary molding of the leads.

The beneficial effects obtained by the general-purpose axial component lead secondary molding device and molding method provided by the present invention are:

(1) The present invention realizes the secondary molding of axial device leads, which has the characteristics of high-precision molding control and the flatness of the bottom surface of the leads. The root of the component lead is stressed, and the molding state is different;

(2) The present invention cooperates with the positioning block and the tooling base to control the distance between the forming part of the component lead and the root of the body or the welding point to at least 2 times the diameter of the lead wire during the secondary molding process of the axial component lead to meet the process requirements;

(3) The present invention can control the secondary molding process of the axial device lead through the clamping block, the "S" shape forming part of the component lead meets the requirements of the bending radius of the process, and controls the forming consistency and flatness of the leads at both ends of the component. Meet the process requirements;

(4) The present invention is simple in structure, reasonable in design, easy to operate, and can be used as a molding tool, which greatly saves the time for forming the size of component leads, and also realizes the process quantification index of secondary molding of axial device leads;

(5) The width of the tooling base boss in the present invention, the thickness of the positioning block body, the width of the groove of the positioning block body, the depth of the groove, the "S" type guide groove of the clamping block, and the parameters of the straight section guide groove can be determined according to different models and specifications The outer diameter of component leads is individually and accurately designed to ensure that the size requirements of various axial component leads after secondary molding meet the standard requirements.

Description of drawings

Below in conjunction with accompanying drawing, invention will be further described:

Fig. 1 is a structural representation of the present invention;

In Figure 1:

1- tooling base; 2- positioning block; 3- clamping block; 4- cover plate; 5- fasteners;

Fig. 2 is cover plate;

Figure 3 is a schematic diagram of the tooling base;

In Figure 3:

6-Boss width; 7-Fastener installation position;

Fig. 4 is a schematic diagram of a positioning block;

In Figure 4:

8-location pin; 9-groove;

Figure 5 is a schematic diagram of the clamping block

In Figure 5:

10 fastener installation parts; 11-"S" type guide groove; 12-"straight section" guide groove;

Figure 6 is a schematic diagram of the cover plate;

13-groove width; 14-locating pin insertion hole

Fig. 7 is a schematic diagram of clamping the leads of components;

FIG. 8 is a schematic diagram of forming lead wires of components.

Detailed ways

The general axial component lead secondary molding device and molding method proposed by the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and use imprecise ratios, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

Example 1

As shown in Figure 1 and Figure 2, the secondary molding tooling for the axial device lead includes a tooling base, a left positioning block, a right positioning block, a left clamping block, a right clamping block, a cover plate, a scraper, and fasteners. The base of the tooling is shown in Figure 3. It is mainly used for the overall weight of the tooling and the overall fixing with the left clamping block and the right clamping block, so as to ensure that the clamping block remains fixed during the secondary molding process of the axial device leads, and ensures that the axial During the secondary molding process of the device lead, the lead forming direction is matched with the positioning groove in the clamping block to ensure the lead forming accuracy, the flatness of the component and the lead, and the width of the boss of the tooling base is consistent with the length of the component body.

The left positioning block and the right positioning block are shown in Figure 4. There is a groove and two positioning pins on the body of the positioning block. The width of the groove is to meet the requirement that the component leads can be placed in this area, and the depth is controlled to be 1/2 of the outer diameter of the lead. This is to place the component leads in this area after the positioning pin of the positioning block is combined with the upper cover plate. When the upper cover plate presses the component leads, this area can form an interference fit to prevent the components from rotating. The thickness of the positioning block body is doubled according to the outer diameter of the component leads. The distance from the forming part of the device lead to the root of the body or the welding point is at least 2 times the diameter of the lead.

The left clamping block and the right clamping block are shown in Figure 5. There are two fastener mounting holes and guide grooves on the clamping block body. The fastener mounting holes are to ensure that the clamping block is fastened to the tooling base. The upper part of the guide groove is "S"-shaped, and the lower part is straight. The size of the "S"-shaped groove matches the width of the groove of the positioning block to ensure that the lead wires of the components are adapted to the guide groove during the molding process. , the bending radius of the lead forming size meets the requirements of the secondary forming standard, and the size of the straight section groove is consistent with that of the "S" type groove, ensuring that the leads on the left and right sides of the component after secondary forming are on the same plane, and the plane The degree is good.

The cover plate is shown in FIG. 6 , the groove size of the cover plate is consistent with the positioning pin size of the positioning block, and the positioning pin can ensure that the cover plate and the positioning block are relatively fixed during the secondary molding process of the axial device leads.

The scraper is shown in Figure 7. The front end of the scraper is rounded, and the bending radius is consistent with the width of the groove of the positioning block. During the secondary molding process of the axial device lead, it provides external force for lead forming.

The specific operation steps to realize the overmolding tooling of a kind of axial device lead of the present invention are as follows:

Step 1, put the axial component on the tooling base with the width of the boss consistent with the length of the component body;

Step 2, select the left positioning block and the right positioning block of the same thickness required by the corresponding shoulder width size and place them on both sides of the boss of the tooling base;

Step 3, select the left clamping block and the right clamping block of the "S" type guide groove matched with the secondary molding of the axial device lead and place them on the outside of the left positioning block and the right positioning block respectively;

Step 4, use fasteners to fasten the left positioning block, left clamping block, tooling base, right positioning block, right clamping block, and tooling base;

Step 5, after positioning the positioning hole of the cover plate and the positioning pins on the left positioning block and the right positioning block, install it;

Step 6: Install the cover plate so that the bottom surface of the cover plate and the left positioning block and the right positioning block clamp the left and right leads of the axial components respectively, and use the scraper to move the components along the guide grooves of the left clamping block and the right clamping block respectively. The leads at the left and right ends of the device are subjected to secondary molding;

Step 7, take out the cover plate along the positioning pins of the left positioning block and the right positioning block, and then take out the components after secondary molding of the leads.

The content not described in detail in this specification belongs to the prior art known to those skilled in the art. It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention.

Claims (6)

1. A general-purpose axial component lead secondary molding device, characterized in that it includes a tooling base, a left positioning block, a right positioning block, a left clamping block, a right clamping block, a cover plate, a scraper, and fasteners ; The tooling base is used for the overall counterweight, the left clamping block is integrally fixed on the left side of the tooling base, and the right clamping block is integrally fixed on the right side of the tooling base; the tooling base boss The width is consistent with the body length of the universal axial component; Both the left positioning block and the right positioning block body are provided with a groove and two positioning pins; the width of the groove is the outer diameter of the component lead, and the depth is 1/2 of the outer diameter of the component lead; The left clamping block body is provided with two fastener mounting holes and two guide grooves, and the right clamping block body is also provided with two fastener mounting holes and two guide grooves; The firmware installation hole is used to ensure the fastening of the clamping block and the tooling base. The upper part of the guide groove is S-shaped, and the lower part is a straight section; the size of the S-shaped groove matches the width of the groove of the positioning block, ensuring During the forming process of the component lead, it adapts to the guide groove, and the bending radius of the lead forming size meets the requirements of the secondary forming standard; the size of the straight section groove is consistent with the size of the S-shaped groove, ensuring that the secondary The lead wires on the left and right sides of the formed component are on the same plane, and the flatness is good; The groove size of the cover plate is consistent with the size of the positioning pin of the positioning block, and the positioning pin is used to ensure that the cover plate and the positioning block are relatively fixed during the secondary molding process of the axial device lead; The front end of the scraper is rounded, and the bending radius is consistent with the width of the groove of the positioning block. During the secondary molding process of the axial device lead, it provides an external force for forming the lead. 2. The general-purpose axial component lead overmolding device according to claim 1, characterized in that, the tooling base is used to ensure that the clamping block remains fixed during the overmolding process of the axial component lead, ensuring that the axial During the secondary molding process of the device leads, the forming direction of the leads is kept matched with the positioning groove in the clamping block, so as to ensure the forming accuracy of the leads and the flatness of the components and the leads. 3. The general-purpose axial component lead secondary molding device as claimed in claim 2, wherein the depth of the grooves on the bodies of the left positioning block and the right positioning block is 1/2 of the outer diameter of the lead wire, when the left After the positioning pins of the positioning block and the right positioning block are combined with the upper cover plate, when the component leads are placed in this area, the upper cover plate presses the component leads, and this area can form an interference fit to prevent the components from rotating; The body thickness of the left positioning block and the right positioning block is controlled to meet the requirements of at least 2 times the diameter of the component lead from the root of the body or the welding point after the secondary molding. 4. The general-purpose axial component lead secondary molding device according to claim 1, characterized in that, the front end of the scraper is rounded, which can effectively prevent the component from being damaged during the process of applying the forming force to the scraper. Damage to leads. 5. The secondary molding device for universal axial component leads according to claim 1, characterized in that, the width of the boss of the tooling base, the thickness of the positioning block body, the width of the groove of the positioning block body, the depth of the groove, the clamping The parameters of the block S-shaped guide groove and the straight section guide groove can be individually and accurately designed according to the outer diameter of the component leads of different models and specifications, so as to ensure that the size requirements of the leads of various axial components after the secondary molding lead are formed meet the standard requirements, and can be used as Subsequent single-variety large-volume components are used for secondary molding of axial device leads. 6. The molding method using the general-purpose axial component lead secondary molding device according to any one of claims 1 to 5, characterized in that it comprises the following steps: S1. Put the axial device on the tooling base; S2. Select the left positioning block and the right positioning block of the same thickness required by the corresponding shoulder width and place them on both sides of the boss of the tooling base; S3. Select the left clamping block and the right clamping block of the S-shaped guide groove matched with the secondary molding of the axial device lead and place them on the outside of the left positioning block and the right positioning block respectively; S4. Use fasteners to fasten the left positioning block, left clamping block, tooling base, right positioning block, right clamping block, and tooling base; S5. After positioning the positioning hole of the cover plate and the positioning pins on the left positioning block and the right positioning block, install it; S6. Install the cover plate so that the bottom surface of the cover plate and the left positioning block and the right positioning block clamp the left and right leads of the axial components respectively, and use the scraper to place the components along the guide grooves of the left clamping block and the right clamping block respectively. The leads at the left and right ends are subjected to secondary molding; S7. Take out the cover plate along the positioning pins of the left positioning block and the right positioning block, and then take out the components after secondary molding of the leads.

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