TO package power tube pin forming tool and forming method

Abstract

The application provides a TO package power tube pin forming tool and forming method, which comprises a base plate, a base, a sliding block, a limiting component, a moving component, a torsion component, a forming component and a connecting assembly; the base and the limiting component are adjacently arranged on the base plate, and the base is provided with a guide groove; the sliding block is slidably arranged in the guide groove, and the sliding block is fixedly connected with the moving component; the limiting component is oppositely arranged with the moving component, and the limiting component is provided with a first clamping part and a first accommodating part; the moving component is provided with a second clamping part and a second accommodating part, the second clamping part is arc-shaped, and is provided with an accommodating groove for accommodating the pin; a first forming surface of the moving component is an inclined surface; a first end of the torsion component is rotatably connected with the base through the connecting assembly, and a second end is fixedly connected with the forming component; a second forming surface of the forming component is an inclined surface, and an end of the second forming surface, which is in contact with the pin root, is arc-shaped. The application can solve the problems of large operation difficulty and low qualified rate of the manual forming method.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic assembly, in particular to a TO package power tube pin forming tool and forming method. BACKGROUND

[0002] In the process of electronic assembly, a large number of TO package devices are used for electrical assembly, but due to the limitation of assembly space, the power tube needs to be shaped before use. At present, the artificial method is mainly used for shaping. The disadvantages of artificial shaping are mainly: ① It is easy to cause the root of the pin to be stressed, thereby causing the glass insulation terminal at the root of the power tube pin to be broken and the internal power tube to be damaged; ② The hardness of the pin is generally large, and the shaping length needs to be ensured during shaping, which is difficult to operate; ③ Due to the difference in shaping angle and shaping quality caused by different people, it is difficult to control, the consistency of the shaped products is poor, the qualified rate is low, the rework times are many, and the efficiency is low and the cost is high. SUMMARY

[0003] The present application provides a TO package power tube pin forming tool, which can solve the technical problems of the present artificial shaping method, such as difficult operation and low qualified rate.

[0004] According to one aspect of the present application, a TO package power tube pin forming tool is provided, comprising a bottom plate, a base, a sliding block, a limiting component, a moving component, a torsion component, a forming component and a connecting assembly;

[0005] The base and the limiting component are arranged adjacent to each other on the bottom plate, and one side of the base adjacent to the limiting component is provided with a guide groove;

[0006] The sliding block is slidably arranged in the guide groove, and the sliding block is fixedly connected with the moving component;

[0007] The limiting component and the moving component are arranged opposite to each other, and one side of the limiting component opposite to the moving component is provided with a first clamping part and a first accommodating part;

[0008] One side of the moving component opposite to the limiting component is provided with a second clamping part and a second accommodating part, the first clamping part and the second clamping part are used for clamping the pin of the TO package power tube, and the cavity formed by the first accommodating part and the second accommodating part is used for accommodating the body of the TO package power tube, the second clamping part is arc-shaped and is provided with an accommodating groove for accommodating the pin, and the first forming surface of the moving component is beveled;

[0009] The first end of the torsion component is rotatably connected with the base through the connecting assembly, and the second end is fixedly connected with the forming component;

[0010] The second forming surface of the forming component is a bevel, and the end of the second forming surface in contact with the pin base is in a circular arc shape. The pins of the TO package power tube are pressed between the first forming surface and the second forming surface by rotating the forming component, so as to complete the pin forming.

[0011] Preferably, the diameter of the circular arc of the second clamping part is greater than or equal to 2 times the diameter of the pin, and the diameter of the accommodating groove is less than the diameter of the pin.

[0012] Preferably, the slopes of the first forming surface and the second forming surface are the same, and the lengths of the first forming surface and the second forming surface are the same as the length of the to-be-formed part of the pin. The included angle between the first forming surface and the unformed pin is greater than 90°.

[0013] Preferably, the first elastic component is further arranged between the guide groove and the first end of the sliding block, and is used to provide a restoring force in the sliding direction to the sliding block, so as to return the sliding block to the initial position.

[0014] Preferably, the second elastic component is further arranged between the second end of the sliding block and the torsion component, and is used to provide a restoring force opposite to the rotating direction to the torsion component, so as to return the torsion component to the initial position.

[0015] Preferably, the guide groove is provided with a limiting part, and the limiting part is used to limit the sliding block.

[0016] Preferably, the depth of the guide groove is the same as the thickness of the sliding block.

[0017] Preferably, the connecting assembly comprises a bearing and a locking screw. The bearing is arranged in the through hole of the first end of the torsion component, and the locking screw passes through the through hole of the bearing and the base, and is used to lock the bearing and the base, so that the torsion component and the base are rotatably connected.

[0018] Preferably, the bottom plate is in a stepped shape, comprising a convex surface and a concave surface. The bottom surface of the base and the limiting component is in contact with the convex surface of the bottom plate, and the bottom of the moving component is not in contact with the concave surface.

[0019] According to another aspect of the present application, a TO package power tube pin forming method is provided. The method is performed by using any of the above-mentioned tooling, and the method comprises the following steps:

[0020] The moving component is moved away from the limiting component, so that the moving component and the limiting component have a preset interval;

[0021] The body of the TO package power tube is placed in the first accommodating part of the limiting component, and the pin of the TO package power tube is in contact with the first clamping part of the limiting component.

[0022] Moving the moving component towards the direction of the limiting component until the first clamping part and the second clamping part are in close contact, so that the pin of the TO package power tube is clamped between the first clamping part and the second clamping part;

[0023] Rotating the forming component towards the direction of the moving component until the second forming surface is in contact with the pin;

[0024] Continuously rotating the forming component at a constant speed towards the direction of the moving component until the pin of the TO package power tube is pressed between the first forming surface and the second forming surface and is kept for a preset time, so as to complete the pin forming.

[0025] By setting the second clamping part of the moving component as an arc shape and providing a containing groove for containing the pin, the pin is sunk into the arc containing groove, so that the pin is stable and avoids moving. In addition, the non-right-angle bending has a protective effect on the pin forming and avoids causing scratches on the pin during the forming process. By setting the end of the second forming surface of the forming component in contact with the root of the pin as an arc shape, scratches on the pin during the forming process are avoided. By rotating the forming component to form the pin, the problem of laborious manual forming caused by using tweezers to clamp is avoided. Compared with the existing manual forming, the root of the pin is not stressed, the glass terminal can be effectively protected, the forming efficiency is greatly improved, the rhythm of rapid production is met, the forming consistency is good, the one-time forming success rate is greatly improved, and repeated forming correction of the device pin is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings included to provide a further understanding of the embodiments of the application and constitute a part of the specification, illustrate the embodiments of the application and together with the text description serve to explain the principles of the application. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor based on these drawings.

[0027] Figure 1 Fig. 1 shows a structure schematic diagram of a TO package power tube pin forming tool provided by an embodiment of the application;

[0028] Figure 2 Fig. 2 shows a structure schematic diagram of a moving component of the forming tool in Fig. 1; Figure 1

[0029] Fig. 3 shows a structure schematic diagram of a forming component of the forming tool in Fig. 1; Figure 3 Figure 1 Fig. 4 shows a structure schematic diagram of a base of the forming tool in Fig. 1.

[0030] In the above drawings, the following reference signs are used:​

[0031] 10 base plate; 20 base; 21 guide groove; 30 slider; 40 limiting member; 41 first clamping portion; 42 first accommodating portion; 50 moving member; 51 second clamping portion; 511 accommodating groove; 52 second accommodating portion; 53 first shaped surface; 60 torsion member; 70 shaped member; 71 second shaped surface; 80 hand-held member; 90 side plate. DETAILED DESCRIPTION

[0032] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions in the embodiments will be described clearly and completely in the present application with reference to the drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not intended to limit the present application and its application or use in any way. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, the presence of a feature, step, operation, device, component and / or combination thereof is indicated.

[0034] Unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions, and numerical values set forth in the various embodiments described herein are not limiting. It should be understood that the various parts shown in the drawings are not necessarily drawn to scale in proportion. The techniques, methods and devices known to those skilled in the relevant art can not be discussed in detail, but should be considered as part of the authorized specification. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so that once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0035] As Figures 1-3As shown, the present application provides a TO package power tube pin forming tool, which comprises a bottom plate 10, a base 20, a sliding block 30, a limiting component 40, a moving component 50, a torsion component 60, a forming component 70 and a connecting assembly;

[0036] The base 20 and the limiting component 40 are adjacently arranged on the bottom plate 10, and the base 20 is provided with a guide groove 21 on the side adjacent to the limiting component 40;

[0037] The sliding block 30 is slidably arranged in the guide groove 21, and the sliding block 30 is fixedly connected with the moving component 50;

[0038] The limiting component 40 is oppositely arranged with the moving component 50, and the limiting component 40 is provided with a first clamping part 41 and a first accommodating part 42 on the side opposite to the moving component 50;

[0039] The moving component 50 is provided with a second clamping part 51 and a second accommodating part 52 on the side opposite to the limiting component 40, the first clamping part 41 and the second clamping part 51 are used for clamping the pin of the TO package power tube, the cavity formed by the first accommodating part 42 and the second accommodating part 52 is used for accommodating the body of the TO package power tube, the second clamping part 51 is in the shape of a circular arc and is provided with an accommodating groove 511 for accommodating the pin, and the first forming surface 53 of the moving component 50 is in the shape of an inclined plane;

[0040] The first end of the torsion component 60 is rotatably connected with the base 20 through the connecting assembly, and the second end is fixedly connected with the forming component 70;

[0041] The second forming surface 71 of the forming component 70 is in the shape of an inclined plane, the end of the second forming surface 71 in contact with the root of the pin is in the shape of a circular arc, the pin of the TO package power tube is pressed between the first forming surface 53 and the second forming surface 71 by rotating the forming component 70, so as to complete the pin forming.

[0042] The second clamping part 51 of the moving part 50 is arranged in an arc shape, and is provided with a containing groove 511 for containing the pin, the pin is sunk into the arc containing groove 511, so that the pin is stable and avoids moving, and the pin is protected from being scratched during the shaping process due to the non-right-angle bending; the second shaping surface 71 of the shaping part 70 is arranged in an arc shape at the end in contact with the pin root, so as to avoid the pin being scratched during the shaping process; the pin is shaped by rotating the shaping part, so as to avoid the problems of using tweezers to clamp and manually shaping with great effort. Compared with the existing manual shaping, the present application can ensure that the pin root is not stressed, can effectively protect the glass terminal, can greatly improve the shaping efficiency, can meet the rhythm of rapid production, and has good shaping consistency, can greatly improve the success rate of one-time shaping, and avoids repeatedly shaping and correcting the device pin.

[0043] According to an embodiment of the present application, the diameter of the arc of the second clamping part 51 is greater than or equal to 2 times the diameter of the pin, so as to further protect the pin from being scratched during the shaping process, and to achieve better shaping effect. The diameter of the containing groove 511 is smaller than the diameter of the pin, so as to realize the positioning and better clamping effect of the pin.

[0044] According to an embodiment of the present application, the slope of the first shaping surface 53 is the same as that of the second shaping surface 71, and the length of the first shaping surface 53 and the length of the second shaping surface 71 are the same as the length of the part to be shaped of the pin, and the included angle between the first shaping surface 53 and the unshaped pin is greater than 90°, so as to achieve better shaping effect.

[0045] According to an embodiment of the present application, the guide groove 21 is provided with a limiting part for limiting the sliding block 30, so as to avoid unlimited sliding of the sliding block 30. At the same time, the depth of the guide groove 21 is the same as the thickness of the sliding block 30, and the sliding block 30 can only move in the horizontal direction (indicated by the arrow) in the guide groove 21 by the limitation of the limiting part and the limiting part 40, and does not exist in the front-back direction (indicated by the arrow). Figure 1 Figure 1

[0046] According to an embodiment of the present application, the connecting assembly comprises a bearing and a locking screw, the bearing is arranged in the through hole of the first end of the torsion part 60, the locking screw passes through the bearing and the through hole of the base 20, and is used for locking the bearing and the base 20, so that the torsion part 60 and the base 20 are rotatably connected. Wherein, the torsion part 60 rotates around the axis of the through hole of the torsion part 60.

[0047] ​​According to an embodiment of the present application, the bottom plate 10 is stepped, including a convex surface and a concave surface, the bottom surface of the base 20 and the limiting component 40 is in contact with the convex surface of the bottom plate 10, and the bottom of the moving component 50 is not in contact with the concave surface, so as to facilitate the movement of the moving component 50 relative to the bottom plate 10 and avoid the movement of the moving component 50 being hindered by the frictional resistance. The bottom plate 10 is the bottom support part of the whole tooling, and is mainly stable and square to avoid the problem of instability in the subsequent tooling use.

[0048] According to an embodiment of the present application, a first elastic component is further arranged between the guide groove 21 and the first end of the sliding block 30, for providing a restoring force in the sliding direction to the sliding block 30, so as to return the sliding block 30 to the initial position. Specifically, the first elastic component can be a spring, and the first end of the sliding block 30 can be designed as a square structure with a groove for placing and clamping the spring, and the other end of the spring is in abutment with the top of the guide groove 21. When the device is shaped, the moving component 50 drives the sliding block 30 to move left, at this time the spring is compressed and is in a compressed state; after the device is shaped, the external force on the shaping component is removed, and the sliding block 30 is automatically returned to the initial position under the action of the spring, waiting for the shaping operation of the next device, at this time the spring is in a relaxed state.

[0049] According to an embodiment of the present application, a second elastic component is further arranged between the second end of the sliding block 30 and the torsion component 60, for providing a restoring force opposite to the rotating direction to the torsion component 60, so as to return the torsion component 60 to the initial position. Specifically, the second elastic component can be a spring, one end of the spring is fixed on the locking screw of the connecting assembly, and the other end is fixed on the second end of the sliding block 30. After the device is clamped, the spring is in a relaxed state; after the device is shaped, the spring is in a compressed state; after the external force on the shaping component is removed, the sliding block 30 is returned to the initial position, and at the same time, the torsion component 60 is pulled back to the initial position by the pulling force of the spring, waiting for the shaping operation of the next device.

[0050] According to an embodiment of the present application, a handheld component 80 is further arranged, which is connected with the moving component 50, so as to facilitate the movement of the moving component 50.

[0051] According to an embodiment of the present application, the shaping component 70 is arranged as a long strip structure, and according to the principle of lever, more labor is saved in the process of rotating and pressing.

[0052] According to an embodiment of the present application, a side plate 90 is further arranged, which is fixed on the side surface of the base 20 by screws, for covering the components such as bearings and springs, so as to make the appearance of the tooling more beautiful.

[0053] The tooling of this invention is easy to assemble, and the components can be replaced at will according to the device size, which can meet the forming requirements of TO packaged power transistor pins of various package sizes.

[0054] The installation process of this invention is as follows:

[0055] After connecting the base 20 and the limiting component 40 with screws, they are placed on the base plate 10 as a whole. The base plate 10 and the base 20 are then connected with screws. After connecting the moving component 50 and the slider 30 with screws, the slider 30 is installed in the guide groove 21 of the base 20. At this time, the moving component 50 is in a position opposite to the limiting component 40. A spring is installed between the top of the slider 30 and the guide groove 21. A bearing is embedded in the through hole of the torsion component 60. The torsion component 60 and the bearing are tightened and fixed with screws. Then, the forming component 70 and the torsion component 60 are fixedly connected with screws. After that, the whole is fixed on the base 20 with locking screws. One end of the spring is installed on the locking screw, and the other end is installed on the screw at the tail of the limiting slider 30.

[0056] The present invention also provides a method for forming the pins of a TO packaged power transistor, the method comprising forming the pins using any of the aforementioned tooling, the method comprising:

[0057] Move the moving part 50 away from the limiting part 40 so that there is a preset distance between the moving part 50 and the limiting part 40;

[0058] The body of the TO packaged power transistor is placed in the first receiving portion 42 of the limiting member 40, and the pins of the TO packaged power transistor are in contact with the first clamping portion 41 of the limiting member 40.

[0059] Move the moving part 50 toward the limiting part 40 until the first clamping part 41 and the second clamping part 51 are in close contact, so that the pin of the TO packaged power transistor is clamped between the first clamping part 41 and the second clamping part 51.

[0060] Towards the direction of moving part 50 ( Figure 1 Rotate the forming component 70 clockwise until the second forming surface 71 contacts the pin;

[0061] Continue to rotate the forming component 70 at a constant speed toward the moving component 50 until the pin of the TO packaged power transistor is pressed between the first forming surface 53 and the second forming surface 71, and hold for a preset time to complete the pin forming.

[0062] Specifically, during the forming process, it should be ensured that the pins are in the receiving groove and are tightly clamped to avoid the device moving or misaligning due to the pressure of the forming component 70, which would result in the forming state not meeting the device installation and usage requirements.

[0063] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one device or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is inverted, then a dependent "above" or "up" can be oriented "below" or "down" in the inverted orientation. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial relative terms used herein interpreted accordingly.

[0064] In addition, it should be noted that the use of "first", "second", and the like, herein does not imply that there are only two of these items nor that these items must be in a particular order. These designations are used herein for the convenience of the reader to identify the different components of the application.

[0065] The preferred embodiments of the application are described above in detail. The application is not limited to the embodiments described above, but can vary and modify the embodiments in many ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application should be included in the scope of the protection of the application.

Claims

1. A TO package power transistor lead forming tool, characterized by, The device comprises a bottom plate (10), a base (20), a sliding block (30), a limiting component (40), a moving component (50), a twisting component (60), a shaping component (70) and a connecting assembly; The base (20) and the limiting component (40) are arranged adjacently on the bottom plate (10), and the side of the base (20) adjacent to the limiting component (40) is provided with a guide groove (21); The sliding block (30) is slidably arranged in the guide groove (21), and the sliding block (30) is fixedly connected with the moving component (50); The limiting component (40) is arranged oppositely to the moving component (50), and the side of the limiting component (40) opposite to the moving component (50) is provided with a first clamping part (41) and a first accommodating part (42); The side of the moving component (50) opposite to the limiting component (40) is provided with a second clamping part (51) and a second accommodating part (52), the first clamping part (41) and the second clamping part (51) are used for clamping the pins of the TO package power tube, the cavity formed by the first accommodating part (42) and the second accommodating part (52) is used for accommodating the body of the TO package power tube, the second clamping part (51) is in the shape of a circular arc and is provided with an accommodating groove (511) for accommodating the pins, and the first shaping surface (53) of the moving component (50) is in the shape of an inclined plane; The first end of the twisting component (60) is rotatably connected with the base (20) through the connecting assembly, and the second end is fixedly connected with the shaping component (70); The second shaping surface (71) of the shaping component (70) is in the shape of an inclined plane, the end of the second shaping surface (71) in contact with the pin root is in the shape of a circular arc, and the pin of the TO package power tube is pressed between the first shaping surface (53) and the second shaping surface (71) by rotating the shaping component (70), so as to complete the shaping of the pin.

2. The tooling of claim 1, wherein, The diameter of the circular arc of the second clamping part (51) is greater than or equal to twice the diameter of the pin, and the diameter of the accommodating groove (511) is smaller than the diameter of the pin.

3. The tooling of claim 1, wherein, The inclination of the first shaping surface (53) and the second shaping surface (71) is the same, and the length of the first shaping surface (53) and the second shaping surface (71) is the same as the length of the to-be-shaped part of the pin, and the included angle between the first shaping surface (53) and the unshaped pin is greater than 90°.

4. The tooling of any one of claims 1-3, wherein, A first elastic component is further arranged between the guide groove (21) and the first end of the sliding block (30), which is used for providing a restoring force in the sliding direction to the sliding block (30) to make the sliding block (30) return to the initial position.

5. The tooling of any one of claims 1-3, wherein, A second elastic component is further arranged between the second end of the sliding block (30) and the twisting component (60), which is used for providing a restoring force opposite to the rotating direction to the twisting component (60) to make the twisting component (60) return to the initial position.

6. The tooling of any one of claims 1-3, wherein, A limiting part is arranged in the guide groove (21), which is used for limiting the sliding block (30).

7. The tooling of claim 6 wherein, The depth of the guide groove (21) is the same as the thickness of the sliding block (30).

8. The tooling of any one of claims 1-3, wherein, The connecting assembly comprises a bearing arranged in a through hole of a first end of the torsion component (60) and a locking screw passing through the bearing and a through hole of the base (20) for locking the bearing and the base (20) to achieve rotatable connection of the torsion component (60) and the base (20).

9. The tooling of any one of claims 1-3, wherein, The base plate (10) is stepped and comprises a convex surface and a concave surface, the bottom surface of the base (20) and the limiting component (40) is in contact with the convex surface of the base plate (10), and the bottom of the moving component (50) is not in contact with the concave surface.

10. A method of forming a TO-lead package power transistor, comprising: The method is performed by using the tooling device of any one of claims 1-9, and the method comprises: moving the moving component (50) away from the limiting component (40) to have a preset interval between the moving component (50) and the limiting component (40); placing the body of the TO package power tube in the first accommodating part (42) of the limiting component (40), and the pin of the TO package power tube is in contact with the first clamping part (41) of the limiting component (40); moving the moving component (50) towards the limiting component (40) until the first clamping part (41) is in close contact with the second clamping part (51) to clamp the pin of the TO package power tube between the first clamping part (41) and the second clamping part (51); rotating the forming component (70) towards the moving component (50) until the second forming surface (71) is in contact with the pin; continuing to rotate the forming component (70) at a constant speed towards the moving component (50) until the pin of the TO package power tube is pressed between the first forming surface (53) and the second forming surface (71) and is kept for a preset time to complete the pin forming.

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