A general axial component lead secondary molding device and molding method

Abstract

The present invention provides a general axial component lead secondary molding device and molding method, including a tool 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 present invention realizes the secondary molding of axial device leads, has the characteristics of high-precision molding control and maintaining the flatness of the lead bottom surface, and changes the past risks of lead molding size deviation, component lead root stress, and uneven molding state after the axial device lead is manually molded after one-time molding; through the cooperation of the positioning block and the tool base, the component lead molding part in the axial device lead secondary molding process can be controlled to be at least 2 times the lead diameter from the body root or the welding point to meet the process requirements; it can be used as a molding tool, which greatly saves the time for molding the component lead size, and also realizes the process quantitative indicators of axial device lead secondary molding.

Description

Technical Field

[0001] The invention relates to the technical field of electronic assembly, and in particular to a general axial component lead secondary molding device and a molding method. Background Art

[0002] In the process of module electronic assembly of power control stand-alone, a large number of devices such as through-hole resistors and through-hole diodes are used. However, due to the limited space design of the control stand-alone, some through-hole resistors and capacitor leads need to be secondary molded before use. The use of manual hand-held flat-nose pliers, tweezers, etc. for secondary bending can easily cause stress on the root of the lead, resulting in cracks at the root of the through-hole resistor and capacitor leads; since the molding angle and molding quality vary from person to person and are difficult to control, the consistency of the molded products is poor, the body elevation is inconsistent, the body and the leads are not in the same plane, and the efficiency is low. Summary of the invention

[0003] The purpose of the present invention is to provide a general axial component lead secondary molding device and molding method to solve the problems of inconsistent component body elevation, body and lead not being in the same plane, and hidden dangers of lead damage during axial component lead secondary molding.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: to provide a general axial component lead secondary molding device, including 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;

[0005] The tooling base is used for overall counterweighting, the left clamping block is integrally fixed to the left side of the tooling base, and the right clamping block is integrally fixed to the right side of the tooling base; the width of the tooling base boss is consistent with the body length of the universal axial component;

[0006] The left positioning block and the right positioning block body are each provided with a groove and two positioning pins; the width of the groove is the outer diameter of the lead wire of the component, and the depth is half the outer diameter of the lead wire of the component;

[0007] 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 fastener mounting holes are used to ensure that the clamping block is fastened to the tooling base, the upper half of the guide groove is S-shaped, and the lower half is a straight section; wherein the size of the S-shaped groove matches the width of the positioning block groove, ensuring that the lead wires of the components adapt to the guide grooves during the molding process, and the bending radius of the lead molding size meets the requirements of the secondary molding standard; the size of the straight section groove is consistent with the size of the S-shaped groove, ensuring that the leads on the left and right sides of the components after secondary molding are on the same plane, with good flatness;

[0008] The size of the groove 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;

[0009] The front end of the scraper is rounded, and the bending radius is consistent with the width of the positioning block groove, so that the lead forming external force is provided during the secondary forming process of the axial device lead.

[0010] Furthermore, the tooling base is used to ensure that the clamping block remains fixed during the secondary molding process of the axial device lead, ensure that the lead molding direction during the secondary molding process of the axial device lead matches the positioning groove in the clamping block, and ensure good lead molding accuracy and component and lead flatness.

[0011] Furthermore, the depth of the grooves on the left positioning block and the right positioning block body is half the outer diameter of the lead. When the positioning pins of the left positioning block and the right positioning block are combined and positioned 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 component from rotating. The thickness of the left positioning block and the right positioning block body is controlled to meet the requirement that the component lead forming part after secondary molding is at least 2 times the component lead diameter away from the root of the body or the welding point.

[0012] Furthermore, the front end of the scraper is rounded, which can effectively prevent damage to the leads of components when the scraper applies a forming force.

[0013] Furthermore, the parameters of the tooling base boss width, positioning block body thickness, positioning block body groove width, groove depth, clamping block S-shaped guide groove, and straight section guide groove can be individually and accurately designed according to the outer diameters of the leads of components of different models and specifications, ensuring that the dimensional requirements of various axial device leads after secondary molding meet the standard requirements, and can be used for subsequent secondary molding of axial device leads of single-variety and large-scale components.

[0014] Another technical solution of the present invention provides a molding method using the above-mentioned general axial component lead secondary molding device, comprising the following steps:

[0015] S1, placing the axial component on the tooling base;

[0016] S2. Select the left and right positioning blocks of the same thickness that meet the corresponding shoulder width requirements and place them on both sides of the boss of the tooling base;

[0017] S3, select the left clamping block and the right clamping block of the S-shaped guide groove matching the secondary molding of the axial device lead and place them outside the left positioning block and the right positioning block respectively;

[0018] S4. Use fasteners to fasten the left positioning block, the left clamping block, the tooling base, the right positioning block, the right clamping block, and the tooling base;

[0019] S5. Position the positioning holes of the cover plate with the positioning pins on the left positioning block and the right positioning block before installation;

[0020] S6. Install the cover plate so that the bottom surface of the cover plate clamps the left and right leads of the axial component with the left and right positioning blocks respectively, and then use a scraper to perform secondary molding on the left and right ends of the lead of the component along the guide grooves of the left clamping block and the right clamping block respectively;

[0021] S7. Take out the cover along the positioning pins of the left positioning block and the right positioning block, and then take out the components after the lead is secondary molded.

[0022] The beneficial effects achieved by the general axial component lead secondary molding device and molding method provided by the present invention are:

[0023] (1) The present invention realizes secondary molding of axial device leads, and has the characteristics of high-precision molding control and lead bottom surface flatness maintenance, which changes the past practice of once-molding axial device leads and then manually molding, which is prone to lead molding size deviation, stress on the root of component leads, and uneven molding state;

[0024] (2) The present invention can control the component lead forming position during the secondary molding process of the axial device lead to be at least 2 times the lead diameter away from the body root or the welding point by cooperating with the positioning block and the tooling base, thereby meeting the process requirements;

[0025] (3) The present invention can control the "S"-shaped forming part of the component lead to meet the process bending radius requirements through the clamping block during the secondary molding process of the axial device lead, and control the forming consistency and flatness of the lead at both ends of the component to meet the process requirements;

[0026] (4) The present invention has a simple structure, reasonable design, and is easy to operate. It can be used as a molding tool, which greatly saves the time for molding the lead size of components and also achieves the process quantitative indicators of secondary molding of axial device leads;

[0027] (5) The parameters of the tooling base boss width, positioning block body thickness, positioning block body groove width, groove depth, clamping block "S"-shaped guide groove, and straight section guide groove in the present invention can be individually and accurately designed according to the outer diameters of the leads of components of different models and specifications, ensuring that the dimensional requirements of the secondary molding of the leads of various axial devices meet the standard requirements after lead molding, and can be used for the subsequent secondary molding of axial device leads of single-variety and large-scale components. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The invention will be further described below in conjunction with the accompanying drawings:

[0029] Figure 1 It is a structural schematic diagram of the present invention;

[0030] Figure 1 middle:

[0031] 1- tooling base; 2- positioning block; 3- clamping block; 4- cover plate; 5- fastener;

[0032] Figure 2 For the cover plate;

[0033] Figure 3 This is a schematic diagram of the tooling base;

[0034] Figure 3 middle:

[0035] 6- Boss width; 7- Fastener installation location;

[0036] Figure 4 This is a schematic diagram of the positioning block;

[0037] Figure 4 middle:

[0038] 8-positioning pin; 9-groove;

[0039] Figure 5 Schematic diagram of the clamping block

[0040] Figure 5 middle:

[0041] 10- fastener installation position; 11- "S" type guide groove; 12- "straight section" guide groove;

[0042] Figure 6 is a schematic diagram of the cover;

[0043] 13-groove width; 14-positioning pin insertion hole

[0044] Figure 7 A schematic diagram for clamping component leads;

[0045] Figure 8 This is a schematic diagram for forming the leads of components. DETAILED DESCRIPTION

[0046] The following is a further detailed description of the general axial component lead secondary molding device and molding method proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0047] Example 1

[0048] like Figure 1 , Figure 2 The axial device lead secondary molding tool shown in the figure includes a tool 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 tool base is as shown in FIG. Figure 3 As shown, it is mainly used for overall weight balancing of the tooling and overall fixation with the left clamping block and the right clamping block, to ensure that the clamping block remains fixed during the secondary molding of the axial device leads, to ensure that the lead molding direction during the secondary molding of the axial device leads remains matched with the positioning groove in the clamping block, to ensure good lead molding accuracy, good flatness of components and leads, and that the width of the tooling base boss remains consistent with the length of the component body.

[0049] The left positioning block and the right positioning block are as follows: Figure 4 As shown, there is a groove and two positioning pins on the positioning block body. The width of the groove is the outer diameter of the component lead, and the depth is half the outer diameter of the lead. The width of the groove is to ensure that the component lead can be placed in this area, and the depth is controlled to be half the outer diameter of the lead. This is because when the positioning pins of the positioning block are combined with the upper cover plate for positioning, when the component leads are placed in this area, the upper cover plate presses the component leads, and an interference fit can be formed in this area to prevent the component from rotating. The thickness of the positioning block body is enlarged by two times according to the outer diameter of the component lead, and the thickness is controlled to meet the requirement that the component lead forming part after secondary molding is at least 2 times the lead diameter away from the root of the body or the welding point.

[0050] The left clamping block and the right clamping block are as follows Figure 5 As shown, there are two fastener mounting holes and guide grooves on the clamping block body. The fastener mounting holes are used 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 a straight section. The size of the "S"-shaped groove matches the width of the positioning block groove to ensure that the component leads adapt to the guide groove during the molding process, and the bending radius of the lead molding size meets the requirements of the secondary molding standard. The size of the straight section groove is consistent with the size of the "S"-shaped groove to ensure that the leads on the left and right sides of the component after secondary molding are on the same plane with good flatness.

[0051] The cover plate is as Figure 6 As shown, the size of the groove of the cover plate is consistent with the size of the positioning pin 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 lead.

[0052] The scraper is as Figure 7 As shown, the front end of the scraper is rounded, and the bending radius is consistent with the width of the positioning block groove, providing external force for lead forming during the secondary forming process of the axial device lead.

[0053] The specific operation steps of implementing an axial device lead secondary molding tool of the present invention are as follows:

[0054] Step 1: Place the axial component on a tooling base with a boss width that is consistent with the length of the component body;

[0055] Step 2: Select the left and right positioning blocks of the same thickness that meet the corresponding shoulder width requirements and place them on both sides of the tooling base boss;

[0056] Step 3, select the left clamping block and the right clamping block of the "S"-shaped guide groove matching the secondary molding of the axial device lead and place them outside the left positioning block and the right positioning block respectively;

[0057] Step 4: Use fasteners to fasten the left positioning block, the left clamping block, the tooling base, the right positioning block, the right clamping block, and the tooling base;

[0058] Step 5: Position the positioning holes of the cover plate with the positioning pins on the left positioning block and the right positioning block before installing;

[0059] Step 6: Install the cover plate so that the bottom surface of the cover plate clamps the left and right leads of the axial component with the left and right positioning blocks respectively, and then use a scraper to perform secondary molding on the left and right ends of the lead of the component along the guide grooves of the left and right clamping blocks respectively;

[0060] Step seven, take out the cover along the positioning pins of the left positioning block and the right positioning block, and then take out the components after the lead is secondary molded.

[0061] The contents not described in detail in this specification belong to the prior art known to those skilled in the art. It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A general 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 overall counterweighting, the left clamping block is integrally fixed to the left side of the tooling base, and the right clamping block is integrally fixed to the right side of the tooling base; the width of the tooling base boss is consistent with the body length of the universal axial component; The left positioning block and the right positioning block body are each provided with a groove and two positioning pins; the width of the groove is the outer diameter of the lead of a common axial component, and the depth is half the outer diameter of the lead of a common axial component; 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 fastener mounting holes are used to ensure that the clamping block is fastened to the tooling base, the upper half of the guide groove is S-shaped, and the lower half is a straight section; wherein the size of the S-shaped guide groove matches the width of the positioning block groove, ensuring that the lead of the general axial component adapts to the guide groove during the molding process, and the bending radius of the lead molding size meets the requirements of the secondary molding standard; the size of the straight section guide groove is consistent with the size of the S-shaped guide groove, ensuring that the leads on the left and right sides of the general axial component after secondary molding are on the same plane, with good flatness; The size of the insertion hole of the cover plate positioning pin 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 lead of the universal axial component; The front end of the scraper is rounded, and the bending radius is consistent with the width of the positioning block groove, so that the lead forming external force is provided during the secondary forming process of the lead of the general axial component.

2. The general axial component lead secondary molding device according to claim 1, characterized in that: The tooling base is used to ensure that the clamping block remains fixed during the secondary molding process of the leads of general axial components, ensure that the lead molding direction during the secondary molding process of the leads of general axial components matches the positioning groove in the clamping block, and ensure the lead molding accuracy and the flatness of the general axial components and the leads are good.

3. The general axial component lead secondary molding device according to claim 2, characterized in that: The depth of the groove on the left positioning block and the right positioning block body is half the outer diameter of the lead. When the positioning pins of the left positioning block and the right positioning block are combined and positioned with the upper cover plate, when the leads of the universal axial components are placed in this area, the upper cover plate presses the leads of the universal axial components, and this area can form an interference fit to prevent the universal axial components from rotating. The thickness of the left positioning block and the right positioning block body is controlled to meet the requirement that the molding position of the leads of the universal axial components after secondary molding is at least 2 times the diameter of the leads of the universal axial components from the root of the body or the welding point.

4. The general 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 damage to the leads of common axial components during the process of the scraper applying the forming force.

5. The general axial component lead secondary molding device according to claim 1, characterized in that: The parameters of the tooling base boss width, positioning block body thickness, positioning block body groove width, groove depth, clamping block S-shaped guide groove, and straight section guide groove can be personalized and accurately designed according to the outer diameters of the leads of universal axial components of different models and specifications, ensuring that the dimensional requirements of the leads of various universal axial components after secondary molding meet the standard requirements, and can be used for subsequent secondary molding of single-variety and large-scale universal axial components.

6. A molding method using the general axial component lead secondary molding device according to any one of claims 1 to 5, characterized in that: The steps include: S1. Place the universal axial components on the tooling base; S2. Select the left and right positioning blocks of the same thickness that meet the corresponding shoulder width requirements 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 matching the secondary molding of the general axial component lead and place them outside the left positioning block and the right positioning block respectively; S4. Use fasteners to fasten the left positioning block, the left clamping block, the tooling base, the right positioning block, the right clamping block, and the tooling base; S5. Position the positioning pin insertion holes of the cover plate with the positioning pins on the left positioning block and the right positioning block before installation; S6. Install the cover plate so that the bottom surface of the cover plate clamps the left and right leads of the axial universal axial component with the left positioning block and the right positioning block respectively, and then use a scraper to perform secondary molding on the left and right ends of the leads of the universal axial component along the guide grooves of the left clamping block and the right clamping block respectively; S7. Take out the cover along the positioning pins of the left positioning block and the right positioning block, and then take out the universal axial components after the lead is secondary molded.

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