Welding jig and welding process suitable for double-layer standard resistor

Abstract

The invention provides a welding jig and a welding process suitable for a double-layer standard resistor, the welding jig comprises a base body and a movable support frame, the base body is used for placing the double-layer standard resistor, and the movable support frame is movably arranged on the base body in a lifting manner. A positioning groove is formed in the base body, an annular electrode plate of the double-layer standard resistor is contained in the positioning groove, a supporting table is arranged in the center of the positioning groove and used for placing a central electrode plate of the double-layer standard resistor, and a connecting beam is arranged between the supporting table and the base body. The movable supporting frame is slidably arranged on the periphery of the supporting table in a sleeving mode, and a sliding limiting groove matched with the connecting beam is formed in the side face of the movable supporting frame. The movable supporting frame is provided with a plurality of limiting pieces, and the limiting pieces are hinged to the movable supporting frame. According to the welding jig and the welding process, parts can be limited in the welding process, welding operation is facilitated, and meanwhile the welding accuracy and the working efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding jigs, and in particular to a welding jig suitable for double-layer standard resistors and a welding process thereof. Background Art

[0002] SDR cylindrical resistors generally refer to cylindrical resistors with specific specifications and standards. They are mainly used to meet the needs of specific application scenarios. They are suitable for circuits with power, high voltage impact, precision and high safety requirements, and can work stably in harsh working environments.

[0003] The double-layer standard resistor is one of the SDR cylindrical resistors, such as Figure 1 As shown, the main structure of the double-layer standard resistor 10 includes: a resistor body 11, a connecting rod 12, a copper electrode sheet 13, an annular electrode sheet 14 and a central electrode sheet 15. The resistor body 11 connects the copper electrode sheet 13 and the central electrode sheet 15, and the connecting rod 12 connects the copper electrode sheet 13 and the annular electrode sheet 14, and there are multiple connecting rods 12. The copper electrode sheet 13 is provided with corresponding avoidance holes for passing the resistor body 11 and the connecting rod 12. The end of the resistor body 11 is welded to the central electrode sheet 15, and the end of the connecting rod 12 is welded to the annular electrode sheet 14.

[0004] However, the prior art lacks automatic welding equipment for the double-layer standard resistor 10, and usually adopts a semi-automatic manual welding method. During welding, manual operation often causes problems such as misalignment of the center electrode sheet 15 and tilted welding of the connecting rod 12, resulting in a high defective rate of the product and low welding efficiency.

[0005] To this end, how to design a welding fixture and welding process suitable for double-layer standard resistors so that it can limit the parts during the welding process and facilitate the welding operation while improving welding accuracy and work efficiency is a technical problem that technicians in this field need to solve. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a welding fixture suitable for double-layer standard resistors and a welding process thereof, so that parts can be limited during the welding process, and the welding operation is convenient, while improving welding accuracy and work efficiency.

[0007] The objective of the present invention is achieved through the following technical solutions:

[0008] A welding jig suitable for double-layer standard resistors, comprising a base body and a movable support frame, wherein the base body is used to place the double-layer standard resistor, and the movable support frame is movably arranged on the base body in a lifting manner;

[0009] A positioning groove is provided on the base body, and the annular electrode sheet of the double-layer standard resistor is accommodated in the positioning groove. A support platform is provided at the center of the positioning groove, and the support platform is used to place the central electrode sheet of the double-layer standard resistor. A connecting beam is provided between the support platform and the base body;

[0010] The movable support frame is slidably sleeved on the periphery of the support platform, and a sliding limit groove adapted to the connecting beam is opened on the side of the movable support frame, and the connecting beam passes through the sliding limit groove; a plurality of limit members are arranged on the movable support frame, and the limit members are hinged to the movable support frame, and the limit members are used to position the connecting rod of the double-layer standard resistor.

[0011] In one embodiment, the movable support frame is a polygonal column structure, a circular placement surface is provided on the support platform, the size of the placement surface is the same as the size of the central electrode sheet, and the edge of the support platform is tangent to the inner wall of the movable support frame.

[0012] In one of the embodiments, a rotation avoidance groove is provided on the movable support frame, and the limiting member is received in or separated from the rotation avoidance groove.

[0013] In one embodiment, the number of the limiting members is the same as the number of the connecting rods, the limiting member is provided with a rotating shaft, the limiting member is arranged on the movable support frame through the rotating shaft, one end of the limiting member is provided with a clamping block, and the other end forms a blocking end;

[0014] During welding, the plurality of limit members deflect synchronously, the clamping block abuts against the connecting rod, and the blocking end abuts against the supporting platform.

[0015] In one of the embodiments, the movable support frame is provided with a surrounding edge, the surrounding edge is located above the sliding limiting groove, and the surrounding edge is used to limit the central electrode sheet of the double-layer standard resistor.

[0016] In one embodiment, the height of the surrounding edge is the same as the thickness of the central electrode sheet.

[0017] In one embodiment, a driving cylinder is provided at the bottom of the movable support frame, and the driving cylinder drives the movable support frame to perform lifting motion.

[0018] In one of the embodiments, a guardrail is further provided on the base body, and the guardrail is provided at the edge of the positioning groove, and is used to limit the copper electrode sheet of the double-layer standard resistor.

[0019] A welding process is implemented based on the above-mentioned welding fixture, and the main steps include:

[0020] Step 1: placing the annular electrode sheet into the positioning groove, placing the central electrode sheet onto the support table, and placing the central electrode sheet into the movable support frame;

[0021] Step 2, placing the copper electrode sheet into the positioning groove, and pressing the copper electrode sheet onto the movable support frame;

[0022] Step 3, driving the movable support frame to move upward and causing the limiting member to deflect and open;

[0023] Step 4, plugging the resistor and the connecting rod into the copper electrode sheet;

[0024] Step 5, welding the connection between the copper electrode sheet, the resistor and the connecting rod;

[0025] Step six, holding the connecting rod against the holding block of the limiting member, and welding the connection between the connecting rod and the annular electrode sheet;

[0026] Step seven, driving the movable support frame to descend, and welding the connection between the resistor and the central electrode sheet.

[0027] In summary, the present invention is suitable for a welding jig and welding process for a double-layer standard resistor, can limit the parts during the welding process, and facilitates the welding operation, while improving the welding accuracy and work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a schematic diagram of the structure of the double-layer standard resistor involved in the present invention;

[0030] Figure 2 It is a structural schematic diagram of a welding jig applicable to a double-layer standard resistor of the present invention;

[0031] Figure 3 for Figure 2 An exploded schematic diagram of a welding jig suitable for double-layer standard resistors is shown;

[0032] Figure 4 for Figure 3 An exploded schematic diagram of the movable support frame shown;

[0033] Figure 5 Schematic diagram of the welding jig and double-layer standard resistor during the welding process (I);

[0034] Figure 6 Schematic diagram of the welding jig and double-layer standard resistor during the welding process (II);

[0035] Figure 7 Schematic diagram of the matching relationship between the welding fixture and the double-layer standard resistor in another embodiment. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] The present invention provides a welding jig 20 suitable for double-layer standard resistors, which is intended to limit the position of the double-layer standard resistor 10 during the welding process, thereby facilitating the welding operation, avoiding problems such as misaligned welding and tilted welding, and improving the degree of standardization. Figure 2 and Figure 3 As shown, the welding fixture 20 includes a base body 100 and a movable support frame 200 . The base body 100 is used to place the double-layer standard resistor 10 , and the movable support frame 200 is movably disposed on the base body 100 and can be raised and lowered.

[0040] A positioning groove 110 is opened on the base body 100, and the annular electrode sheet 14 of the double-layer standard resistor 10 is accommodated in the positioning groove 110. A support platform 120 is provided at the center of the positioning groove 110. The support platform 120 is used to place the central electrode sheet 15 of the double-layer standard resistor 10. A connecting beam 121 is provided between the support platform 120 and the base body 100.

[0041] The movable support frame 200 is slidably sleeved on the periphery of the support platform 120, and a sliding limit groove 210 adapted to the connecting beam 121 is provided on the side of the movable support frame 200, and the connecting beam 121 is penetrated by the sliding limit groove 210. The movable support frame 200 is provided with a plurality of limit members 220, and the limit members 220 are hinged to the movable support frame 200, and the limit members 220 are used to position the connecting rod 12 of the double-layer standard resistor 10. Furthermore, a rotation avoidance groove 230 is also provided on the movable support frame 200, and the limit members 220 receive or disengage from the rotation avoidance groove 230.

[0042] In this embodiment, if Figure 4 As shown, the number of the limiting members 220 is the same as the number of the connecting rods 12, and the limiting members 220 are provided with a rotation axis 221. The limiting members 220 are provided on the movable support frame 200 through the rotation axis 221. One end of the limiting member 220 is provided with a clamping block 222, and the other end forms a blocking end 223. During welding, multiple limiting members 220 are deflected synchronously, the clamping block 222 will abut against the connecting rod 12, and the blocking end 223 will abut against the support platform 120. The specific working principle of the movable support frame 200 will be described below.

[0043] In this embodiment, if Figure 3 and Figure 4 As shown, the movable support frame 200 is a polygonal column structure, and a circular placement surface is provided on the support table 120. The size of the placement surface is the same as the size of the central electrode sheet 15, and the edge of the support table 120 is tangent to the inner wall of the movable support frame 200. Through the tangent structural restriction, the central axis of the movable support frame 200 always coincides with the central axis of the support table 120, so that the movable support frame 200 can only perform vertical lifting movement relative to the support table 120 without shaking left and right or being misaligned. Of course, in addition to the polygonal column structure, the movable support frame 200 can also be set as a hollow cylindrical structure, and its inner wall is also tangent to the edge of the support table 120 to achieve a stable vertical lifting effect.

[0044] The movable support frame 200 is provided with a surrounding edge 201 (such as Figure 4 As shown in FIG. 2 , the surrounding edge 201 is located above the sliding limit groove 210, and the surrounding edge 201 is used to limit the central electrode sheet 15 of the double-layer standard resistor 10. Preferably, the height of the surrounding edge 201 is the same as the thickness of the central electrode sheet 15, so as to avoid unnecessary shielding during the welding process and affect the welding effect.

[0045] In combination with the above structure, the working principle of the welding jig 20 of the present invention is explained below:

[0046] Initially, the components of the double-layer standard resistor 10 are in a scattered state, and the movable support frame 200 of the welding fixture 20 is located below the base body 100, that is, the movable support frame 200 is in a low position (such as Figure 2 As shown in FIG. 1 , the top (surrounding edge 201) of the sliding limit groove 210 abuts against the connecting beam 121. At this time, the limit member 220 on the movable support frame 200 is received in the rotation avoidance groove 230, and is blocked by the base body 100 and cannot be deflected;

[0047] During welding, first place the annular electrode sheet 14 into the positioning groove 110, and place the central electrode sheet 15 onto the support table 120. At this time, the central electrode sheet 15 is limited by the surrounding edge 201 of the movable support frame 200. Subsequently, place the copper electrode sheet 13 into the positioning groove 110, stack the copper electrode sheet 13 on the annular electrode sheet 14, and then push the movable support frame 200 upward until it is raised to the highest point, so that the bottom of the sliding limit groove 210 abuts against the connecting beam 121. At this time, the copper electrode sheet 13 is lifted by the movable support frame 200, and the resistor 11 and the connecting rod 12 are passed through the holes of the copper electrode sheet 13. Then, the end of the connecting rod 12 will be pressed against the annular electrode sheet 14, and the end of the resistor 11 will be pressed against the central electrode sheet 15.

[0048] After the movable support frame 200 is lifted, the limiting member 220 thereon is no longer blocked by the base body 100, and the limiting member 220 deflects around the rotation axis 221, so that the clamping block 222 is away from the rotation avoidance groove 230. At the same time, the blocking end 223 abuts against the support platform 120, thereby limiting the deflection angle of the limiting member 220, so that the deflection angles of multiple limiting members 220 are the same, and the distances from multiple clamping blocks 222 to the center of the movable support frame 200 are also the same. Then, multiple connecting rods 12 are respectively abutted against multiple clamping blocks 222 (such as Figure 5 As shown), the connecting rod 12 can be positioned by the clamping block 222, thereby ensuring that the connecting rod 12 is vertically pressed on the annular electrode sheet 14 to prevent it from being displaced or tilted. Subsequently, the connection between the connecting rod 12 and the annular electrode sheet 14 is welded, and the connection between the connecting rod 12 and the copper electrode sheet 13 is also welded;

[0049] Next, the connection between the resistor 11 and the copper electrode sheet 13 is welded, and then the movable support frame 200 is driven to descend. During this period, the downward-moving limiter 220 is supported by the base body 100 and deflected in the reverse direction to reset, and then re-accommodated into the rotation avoidance groove 230. After the movable support frame 200 is lowered into place, the central electrode sheet 15 is limited by the surrounding edge 201 of the movable support frame 200, and the contact position between the connecting rod 12 and the central electrode sheet 15 is exposed (such as Figure 6 As shown), the staff then welds the double-layer standard resistor 10. At this point, the welding operation of the double-layer standard resistor 10 is completed, the welding fixture 20 returns to the initial state, and the double-layer standard resistor 10 can be taken away smoothly.

[0050] Compared with the prior art, the welding jig 20 of the present invention is easy to operate and has continuous movements. During the entire welding process, the staff only needs to place the annular electrode sheet 14, the central electrode sheet 15 and the copper electrode sheet 13 in the specified positions in sequence, and then lift and lower the movable support frame 200, plug in the resistor body 11 and the connecting rod 12, and cooperate with the positioning function of the limiter 220 to achieve the double-layer standard resistor 10 welding. After the welding operation is completed, the movable support frame 200 will automatically return to the initial state, which will not affect the removal of the finished product of the double-layer standard resistor 10, and prepare for the next welding, which facilitates the welding operation and improves work efficiency.

[0051] It should be noted that the welding jig 20 can position the various parts of the double-layer standard resistor 10 multiple times during the welding process to ensure welding accuracy. Specifically, during the lifting process of the movable support frame 200, the movable support frame 200 will drive the copper electrode sheet 13 to rise and fall vertically together, so that the center of the copper electrode sheet 13 and the center of the annular electrode sheet 14 are in the same straight line; during the welding process of the connecting rod 12, the limiter 220 and the clamping block 222 position the connecting rod 12 to ensure that the connecting rod 12 is vertically pressed on the annular electrode sheet 14; during the welding process of the resistor body 11, the movable support frame 200 limits the center electrode sheet 15 to prevent it from being misplaced. It can be seen that under the effect of multiple positioning, the welding accuracy of the double-layer standard resistor 10 is improved, thereby realizing standardized production and processing.

[0052] Preferably, a guardrail 101 (such as Figure 7As shown in the figure, the guardrail 101 is arranged at the edge of the positioning groove 110, and is used to limit the copper electrode sheet 13 during the lifting process. Specifically, during the lifting process of the movable support frame 200, the movable support frame 200 will push the copper electrode sheet 13 to move up together. During this period, the copper electrode sheet 13 is easily offset and misplaced by external factors, so the guardrail 101 is provided. The side wall of the guardrail 101 is tangent to the copper electrode sheet 13, which plays a guiding and limiting role, thereby preventing the copper electrode sheet 13 from being disturbed and misplaced, ensuring that the center of the copper electrode sheet 13 and the center of the annular electrode sheet 14 are always kept in the same straight line, thereby improving the welding accuracy.

[0053] Preferably, a driving cylinder (not shown) is provided at the bottom of the movable support frame 200, and the driving cylinder drives the movable support frame 200 to do lifting motion. By controlling the movable support frame 200 by the driving cylinder, the lifting motion can be made more stable, thereby avoiding the situation where the copper electrode sheet 13 is misaligned due to vibration during welding.

[0054] The present invention also provides a welding process, which is implemented based on the above-mentioned welding fixture 20, and the main steps include:

[0055] Step 1: Place the annular electrode sheet 14 into the positioning groove 110, and place the central electrode sheet 15 onto the support table 120, so that the central electrode sheet 15 is in the movable support frame 200;

[0056] Step 2: Place the copper electrode sheet 13 into the positioning groove 110 so that the copper electrode sheet 13 is pressed on the movable support frame 200;

[0057] Step 3, driving the movable support frame 200 to move upward and causing the limiting member 220 to deflect and open;

[0058] Step 4: plug the resistor 11 and the connecting rod 12, so that both of them pass through the holes of the copper electrode sheet 13. The end of the connecting rod 12 is pressed on the annular electrode sheet 14, and the end of the resistor 11 is pressed on the central electrode sheet 15;

[0059] Step 5, welding the connection between the copper electrode sheet 13, the resistor 11 and the connecting rod 12;

[0060] Step 6: Hold the connecting rod 12 against the clamping block 222 of the limiting member 220, and weld the connection between the connecting rod 12 and the annular electrode sheet 14;

[0061] Step seven, driving the movable support frame 200 to descend, and welding the connection between the resistor 11 and the central electrode sheet 15 .

[0062] At this point, the welding process of the double-layer standard resistor 10 is completed, and then the staff can take away the double-layer standard resistor 10. The welding process realized by the welding fixture 20 can position the parts multiple times during the welding process, thereby improving the welding accuracy, and the welding operation is convenient and fast.

[0063] In summary, the present invention is applicable to the welding jig 20 and welding process of the double-layer standard resistor, which can limit the parts during the welding process and facilitate the welding operation, while improving the welding accuracy and work efficiency.

[0064] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A welding jig suitable for double-layer standard resistors, characterized in that: It comprises a base body and a movable support frame, wherein the base body is used to place a double-layer standard resistor, and the movable support frame is movably arranged on the base body in a lifting manner; A positioning groove is provided on the base body, and the annular electrode sheet of the double-layer standard resistor is accommodated in the positioning groove. A support platform is provided at the center of the positioning groove, and the support platform is used to place the central electrode sheet of the double-layer standard resistor. A connecting beam is provided between the support platform and the base body; The movable support frame is slidably sleeved on the periphery of the support platform, and a sliding limit groove adapted to the connecting beam is opened on the side of the movable support frame, and the connecting beam passes through the sliding limit groove; a plurality of limit members are arranged on the movable support frame, and the limit members are hinged to the movable support frame, and the limit members are used to position the connecting rod of the double-layer standard resistor.

2. The welding jig for double-layer standard resistor according to claim 1, characterized in that: The movable support frame is a multi-prism structure, and a circular placement surface is provided on the support platform. The size of the placement surface is the same as the size of the central electrode sheet, and the edge of the support platform is tangent to the inner wall of the movable support frame.

3. The welding jig for double-layer standard resistor according to claim 1, characterized in that: The movable support frame is provided with a rotation avoidance groove, and the limiting member is received in or separated from the rotation avoidance groove.

4. The welding jig for double-layer standard resistor according to claim 3, characterized in that: The number of the limiting members is the same as the number of the connecting rods, the limiting members are provided with a rotating shaft, the limiting members are arranged on the movable support frame through the rotating shaft, one end of the limiting member is provided with a clamping block, and the other end forms a blocking end; During welding, the plurality of limit members deflect synchronously, the clamping block abuts against the connecting rod, and the blocking end abuts against the supporting platform.

5. The welding jig for double-layer standard resistor according to claim 1, characterized in that: The movable support frame is provided with a surrounding edge, the surrounding edge is located above the sliding limiting groove, and the surrounding edge is used to limit the central electrode sheet of the double-layer standard resistor.

6. The welding jig for double-layer standard resistor according to claim 5, characterized in that: The height of the surrounding edge is the same as the thickness of the central electrode sheet.

7. The welding jig for double-layer standard resistor according to claim 1, characterized in that: A driving cylinder is provided at the bottom of the movable support frame, and the driving cylinder drives the movable support frame to perform lifting motion.

8. The welding jig for double-layer standard resistor according to claim 1, characterized in that: The base body is also provided with a guardrail, which is arranged at the edge of the positioning groove and is used to limit the copper electrode sheet of the double-layer standard resistor.

9. A welding process, characterized in that: The welding jig according to any one of claims 1 to 8 is implemented, and its main steps include: Step 1: placing the annular electrode sheet into the positioning groove, placing the central electrode sheet onto the support table, and placing the central electrode sheet into the movable support frame; Step 2, placing the copper electrode sheet into the positioning groove, and pressing the copper electrode sheet onto the movable support frame; Step 3, driving the movable support frame to move upward and causing the limiting member to deflect and open; Step 4, plugging the resistor and the connecting rod into the copper electrode sheet; Step 5, welding the connection between the copper electrode sheet, the resistor and the connecting rod; Step six, holding the connecting rod against the holding block of the limiting member, and welding the connection between the connecting rod and the annular electrode sheet; Step seven, driving the movable support frame to descend, and welding the connection between the resistor and the central electrode sheet.

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