A welding jig and welding process applicable to double-layer standard resistors

Abstract

The present invention provides a welding jig and a welding process suitable for a double-layer standard resistor. The welding jig includes 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 arranged on the base body in a liftable and movable manner. A positioning groove is formed on the base body, and the annular electrode plates of the double-layer standard resistor are received in the positioning groove. A support platform is arranged at the center of the positioning groove, and the support platform is used for placing the central electrode plate of the double-layer standard resistor. A connecting beam is arranged 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 limiting groove adapted to the connecting beam is formed on the side surface of the movable support frame. A plurality of limiting members are arranged on the movable support frame, and the limiting members are hinged to the movable support frame. The welding jig and the welding process can limit the parts during the welding process, facilitate the welding operation, and improve the welding accuracy and work efficiency at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of welding jigs, and particularly to a welding jig applicable to double-layer standard resistors and a welding process therefor. Background Art

[0002] The SDR cylindrical resistor generally refers to a cylindrical resistor with specific specifications and standards, mainly used to meet the requirements of specific application scenarios, applicable to circuits with power type, high-voltage impact type, precision type, and high safety requirements, and can work stably in harsh working environments.

[0003] The double-layer standard resistor is one type of the SDR cylindrical resistor. As Figure 1 shown, the main structure of the double-layer standard resistor 10 includes: a resistor body 11, connecting rods 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 rods 12 connect the copper electrode sheet 13 and the annular electrode sheet 14, and the number of the connecting rods 12 is multiple. Corresponding avoidance holes are formed in the copper electrode sheet 13 for passing through the resistor body 11 and the connecting rods 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 existing technology lacks an automatic welding device for the double-layer standard resistor 10, and usually adopts a semi-automatic manual welding method. During welding, problems such as misalignment of the central electrode sheet 15 and inclined welding of the connecting rods 12 often occur in manual operation, resulting in a high defective rate of products and low welding efficiency.

[0005] Therefore, how to design a welding jig and a welding process applicable to double-layer standard resistors, so that it can limit the parts during the welding process, facilitate the welding operation, and improve the welding accuracy and working efficiency at the same time, is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a welding jig applicable to double-layer standard resistors and a welding process therefor, so that it can limit the parts during the welding process, facilitate the welding operation, and improve the welding accuracy and working efficiency at the same time.

[0007] The purpose of the present invention is achieved by the following technical solutions:

[0008] A welding jig applicable to double-layer standard resistors includes a base body and a movable support frame. The base body is used to place the double-layer standard resistor, and the movable support frame is arranged on the base body in a liftable and movable manner;

[0009] The base body is provided with a positioning groove, the annular electrode plate of the double-layer standard resistor is received in the positioning groove, a support platform is arranged at the center of the positioning groove, the support platform is used for placing the central electrode plate of the double-layer standard resistor, and a connecting beam is arranged between the support platform and the base body;

[0010] The movable support frame is slidably sleeved on the periphery of the support platform, a sliding limiting groove adapted to the connecting beam is arranged on the side surface of the movable support frame, and the connecting beam penetrates through the sliding limiting groove; a plurality of limiting members are arranged on the movable support frame, the limiting members are hinged to the movable support frame, and the limiting members are used for positioning the connecting rods of the double-layer standard resistor.

[0011] In one embodiment, the movable support frame is of a polygonal prism structure, a circular placing surface is arranged on the support platform, the size of the placing surface is the same as that of the central electrode plate, and the edge of the support platform is tangent to the inner wall of the movable support frame.

[0012] In one embodiment, a rotation avoidance groove is arranged on the movable support frame, and the limiting member is received in or disengaged from the rotation avoidance groove.

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

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

[0015] In one embodiment, a surrounding edge is arranged on the movable support frame, the surrounding edge is located above the sliding limiting groove, and the surrounding edge is used for limiting the central electrode plate 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 plate.

[0017] In one embodiment, a driving air cylinder is arranged at the bottom of the movable support frame, and the driving air cylinder drives the movable support frame to move up and down.

[0018] In one embodiment, a guardrail is further arranged on the base body, the guardrail is arranged at the edge of the positioning groove, and it is used for limiting the copper electrode plate of the double-layer standard resistor.

[0019] A welding process is realized based on the above welding jig, and the main steps include:

[0020] Step 1: Place the annular electrode sheet into the positioning groove, place the central electrode sheet on the support platform, and the central electrode sheet is within the movable support frame.

[0021] Step 2: Place the copper electrode sheet into the positioning groove, and the copper electrode sheet presses on the movable support frame.

[0022] Step 3: Drive the movable support frame to move upward and cause the limiting member to deflect and open.

[0023] Step 4: Insert the resistor body and the connecting rod into the copper electrode sheet.

[0024] Step 5: Weld the connection between the copper electrode sheet and the resistor body and the connecting rod.

[0025] Step 6: Press the connecting rod against the clamping block of the limiting member and weld the connection of the connecting rod to the annular electrode sheet.

[0026] Step 7: Drive the movable support frame to descend and weld the connection of the resistor body to the central electrode sheet.

[0027] In summary, the present invention is applicable to a welding jig and a welding process for double-layer standard resistors, which can limit parts during the welding process, facilitate welding operations, and improve welding accuracy and work efficiency at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

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

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

[0031] Figure 3 is Figure 2 an exploded schematic diagram of the welding jig applicable to the double-layer standard resistor shown;

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

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

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

[0035] Figure 7 Schematic diagram of the cooperation relationship between the welding jig and the double-layer standard resistor in another embodiment. Detailed implementation manners

[0036] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are shown 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, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate 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 embodiments.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. 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 of the related listed items.

[0039] The present invention provides a welding jig 20 suitable for a double-layer standard resistor, aiming to limit the double-layer standard resistor 10 during the welding process, so as to facilitate the welding operation, avoid problems such as misaligned welding and inclined welding, and improve the standardization degree. As Figure 2 and Figure 3 shown, the welding jig 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 arranged on the base body 100 in a liftable manner.

[0040] The base body 100 is provided with a positioning groove 110. The annular electrode plate 14 of the double-layer standard resistor 10 is received 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 plate 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 around the support platform 120. A sliding limit groove 210 adapted to the connecting beam 121 is provided on the side surface of the movable support frame 200. The connecting beam 121 passes through the sliding limit groove 210. A plurality of limiting members 220 are provided on the movable support frame 200. The limiting members 220 are hinged to the movable support frame 200. The limiting members 220 are used to position the connecting rod 12 of the double-layer standard resistor 10. Further, a rotation avoidance groove 230 is also provided on the movable support frame 200. The limiting members 220 are received in or disengaged from the rotation avoidance groove 230.

[0042] In this embodiment, as Figure 4 shown, the number of the limiting members 220 is the same as the number of the connecting rods 12. The limiting members 220 are provided with a rotating shaft 221. The limiting members 220 are provided on the movable support frame 200 through the rotating shaft 221. A clamping block 222 is provided at one end of the limiting member 220, and a blocking end 223 is formed at the other end. During welding, the plurality of limiting members 220 deflect 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, as Figure 3 and Figure 4 shown, the movable support frame 200 is a multi-prismatic structure. The support platform 120 is provided with a circular placement surface. The size of the placement surface is the same as the size of the central electrode plate 15, and the edge of the support platform 120 is tangent to the inner wall of the movable support frame 200. Through the restriction of the tangent structure, the central axis of the movable support frame 200 always coincides with the central axis of the support platform 120. Then the movable support frame 200 can only perform vertical lifting movement relative to the support platform 120, and will not shake left and right or be misaligned. Of course, in addition to the multi-prismatic 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 platform 120 to achieve a stable vertical lifting effect.

[0044] The movable support frame 200 is provided with a surrounding edge 201 (as Figure 4 shown). The surrounding edge 201 is located above the sliding limit groove 210. The surrounding edge 201 is used to limit the central electrode plate 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 plate 15, so as to avoid unnecessary shielding during the welding process and affect the welding effect.

[0045] The working principle of the welding jig 20 of the present invention will be described below in conjunction with the above structure:

[0046] Initially, the parts of the double-layer standard resistor 10 are in a scattered state, and the movable support frame 200 of the welding jig 20 is located below the base body 100, that is, the movable support frame 200 is in a low position (as Figure 2 shown), and the top (perimeter 201) of the sliding limit groove 210 abuts against the connecting beam 121. At this time, the limiting 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 deflect;

[0047] During welding, first place the annular electrode sheet 14 into the positioning groove 110, and place the central electrode sheet 15 on the support table 120. At this time, the central electrode sheet 15 is limited by the perimeter 201 of the movable support frame 200. Subsequently, place the copper electrode sheet 13 into the positioning groove 110, and the copper electrode sheet 13 is stacked on the annular electrode sheet 14. Then, push the movable support frame 200 upward until it is raised to the highest position, 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 body 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 press on the annular electrode sheet 14, and the end of the resistor body 11 will press on 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 moves away from the rotation avoidance groove 230. At the same time, the blocking end 223 abuts against the support table 120, thereby restricting the deflection angle of the limiting member 220, so that the deflection angles of the plurality of limiting members 220 are the same, and the distances from the plurality of clamping blocks 222 to the center of the movable support frame 200 are also the same. Then, respectively abut the plurality of connecting rods 12 against the plurality of clamping blocks 222 (as Figure 5 shown), so that 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 misaligned or tilted. Subsequently, weld the connection between the connecting rod 12 and the annular electrode sheet 14, and at the same time weld the connection between the connecting rod 12 and the copper electrode sheet 13;

[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 provided 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 upward together. During this period, the copper electrode sheet 13 is likely to be offset due to external factors. Therefore, the guardrail 101 is provided. The side wall of the guardrail 101 is tangent to the copper electrode sheet 13, playing a guiding and restricting role, thereby preventing the copper electrode sheet 13 from being misaligned due to interference and ensuring that the center of the copper electrode sheet 13 and the center of the annular electrode sheet 14 always remain on the same straight line, improving the welding accuracy.

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

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

[0055] Step 1, place the annular electrode sheet 14 into the positioning groove 110, place the central electrode sheet 15 on the support table 120, and the central electrode sheet 15 is located inside the movable support frame 200;

[0056] Step 2, then place the copper electrode sheet 13 into the positioning groove 110 so that the copper electrode sheet 13 presses on the movable support frame 200;

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

[0058] Step 4, insert the resistor body 11 and the connecting rod 12 so that both pass through the hole of the copper electrode sheet 13. And the end of the connecting rod 12 presses on the annular electrode sheet 14, and the end of the resistor body 11 presses on the central electrode sheet 15;

[0059] Step 5, weld the joints of the copper electrode sheet 13 with the resistor body 11 and the connecting rod 12;

[0060] Step 6, abut the connecting rod 12 against the clamping block 222 of the limiting member 220 and weld the joint of the connecting rod 12 to the annular electrode sheet 14;

[0061] Step 7, drive the movable support frame 200 to descend and weld the joint of the resistor body 11 to the central electrode sheet 15.

[0062] Thus, 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 jig 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 welding jig 20 and the welding process of the present invention for double-layer standard resistors can limit the parts during the welding process, facilitate the welding operation, and improve the welding accuracy and work efficiency at the same time.

[0064] The above-described embodiments merely represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent shall be subject to the appended claims.

Claims

1. A soldering process applicable to double-layer standard resistors, characterized in that, It includes a welding jig, and the welding jig includes a base body and a movable support frame. The base body is used to place a double-layer standard resistor, and the movable support frame is arranged on the base body in a liftable and movable manner; A positioning groove is formed on the base body. The annular electrode plates of the double-layer standard resistor are received in the positioning groove. A support platform is arranged at the center of the positioning groove. The support platform is used to place the central electrode plate of the double-layer standard resistor. A connecting beam is arranged between the support platform and the base body; The movable support frame is slidably sleeved around the support platform. A sliding limit groove adapted to the connecting beam is formed on the side surface of the movable support frame. The connecting beam passes through the sliding limit groove; A plurality of limit members are arranged on the movable support frame. The limit members are hinged to the movable support frame. The limit members are used to position the connecting rods of the double-layer standard resistor; The number of the limit members is the same as that of the connecting rods. A winding rotating shaft is arranged on the limit member. The limit member is arranged on the movable support frame through the winding rotating shaft. A clamping block is arranged at one end of the limit member, and a blocking end is formed at the other end; During welding, a plurality of the limit members deflect synchronously. The clamping block abuts against the connecting rod, and the blocking end abuts against the support platform; A surrounding edge is arranged on the movable support frame. The surrounding edge is located above the sliding limit groove. The surrounding edge is used to limit the central electrode plate of the double-layer standard resistor; The main steps of this welding process include: Step 1, place the annular electrode plates into the positioning groove, place the central electrode plate on the support platform, and the central electrode plate is located inside the movable support frame; Step 2, place the copper electrode plate into the positioning groove, and the copper electrode plate presses on the movable support frame; Step 3, drive the movable support frame to move upward and cause the limit members to deflect and open; Step 4, insert the resistor body and the connecting rods into the copper electrode plate; Step 5, weld the joints of the copper electrode plate with the resistor body and the connecting rods; Step 6, abut the connecting rod against the clamping block of the limit member, and weld the joint of the connecting rod with the annular electrode plate; Step 7, drive the movable support frame to descend, and weld the joint of the resistor body with the central electrode plate.

2. The soldering process applicable to the double-layer standard resistor according to claim 1, characterized in that, The movable support frame is of a polygonal prism structure. A circular placing surface is arranged on the support platform. The size of the placing surface is the same as that of the central electrode plate, and the edge of the support platform is tangent to the inner wall of the movable support frame.

3. The soldering process applicable to the double-layer standard resistor according to claim 1, characterized in that A rotation avoidance groove is formed on the movable support frame. The limit member is received in or disengaged from the rotation avoidance groove.

4. The soldering process applicable to the double-layer standard resistor according to claim 1, characterized in that The height of the surrounding edge is the same as the thickness of the central electrode plate.

5. The welding process applicable to a double-layer standard resistor according to claim 1, characterized in that, A driving cylinder is arranged at the bottom of the movable support frame. The driving cylinder drives the movable support frame to move up and down.

6. The soldering process applicable to the double-layer standard resistor according to claim 1, characterized in that, A guardrail is further arranged on the base body. The guardrail is arranged at the edge of the positioning groove. It is used to limit the copper electrode plate of the double-layer standard resistor.

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