A welding leg on a relay base electric spark wire cutting clamp

Abstract

The application discloses a relay base upper welding leg electric spark wire cutting clamp, which comprises a base and a conductive block. The upper end of the base is provided with a positioning groove. The rear end of the positioning groove is provided with a pressing screw. The front end of the positioning groove is provided with an opening, and the width of the opening is smaller than the width of the relay base. The conductive block is installed in the positioning groove. The end of the conductive block, which faces the opening, is provided with a first groove. The bottom of the first groove is horizontally provided with a probe. The probe is arranged opposite to the welding leg of the relay base. The outer periphery of the first groove is provided with a sunken platform. The shape of the sunken platform is matched with the shape of the relay base. The relay base is installed in the sunken platform, and the relay base is protruded or flush with the sunken platform. The welding leg to be cut of the relay base faces the opening. The clamp can not only significantly improve the labor productivity, but also effectively guarantee the product quality. Meanwhile, the labor cost consumed by copper wire winding and copper wire dismounting is saved.

Description

Technical Field

[0001] This invention belongs to the field of relay manufacturing technology, specifically relating to an electrical discharge wire cutting fixture for welding feet on a relay base. Background Technology

[0002] like Figure 1 As shown, the relay base mainly consists of three parts: a base plate, solder feet, and glass. The base plate and solder feet are sintered together by the glass, which also forms an insulating layer between each solder foot and the base plate. Due to factors such as the sintering process characteristics and the consistency of the solder foot parts, to ensure that the height of the solder feet on the base meets the requirements of the design drawings, such as... Figure 2 As shown, the weld feet on the sintered base need to be reprocessed. Using traditional cutting and shearing methods to reprocess the weld feet inevitably puts stress on the glass, which can lead to cracking, air leakage, and failure to meet the base's sealing performance requirements. Therefore, special processing methods such as electrical discharge machining (EDM) and laser cutting are necessary to reprocess the weld feet. After evaluation and analysis, wire EDM is selected as the optimal process for processing the weld foot height.

[0003] For a long time, when processing relay bases using wire EDM, in order to reliably connect the glass-insulated solder feet to the machine tool anode, it was necessary to manually wrap copper wire around each solder foot, connect it to the base plate, and finally connect the base plate to the machine tool table to achieve anode conductivity. After the wire EDM process was completed, the copper wire wrapped around the solder feet was removed. This method was not only time-consuming and labor-intensive, but also prone to damaging the solder feet and the surface of the base plate during the winding and unwinding of the copper wire, affecting the product's appearance. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a wire EDM fixture for soldering feet on a relay base. The technical problem to be solved by this invention is achieved through the following technical solution:

[0005] A wire EDM fixture for solder joints on a relay base includes a base and a conductive block. The base has a positioning groove at its upper end, a clamping screw at its rear end, and an opening at its front end, the width of which is less than the width of the relay base. The conductive block is installed in the positioning groove, and a first groove is formed at the end of the conductive block facing the opening. Probes are horizontally inserted into the bottom of the first groove, and the probes are respectively positioned opposite to the solder joints on the relay base. A countersunk platform is formed on the outer periphery of the opening of the first groove, the shape of which matches the shape of the relay base. The relay base is installed in the countersunk platform, protruding from or flush with it, with the solder joint to be cut facing the opening.

[0006] Preferably, the probe is a telescopic flat-end probe.

[0007] Preferably, a second groove is arranged below the opening and penetrates the lower end surface of the base and the opening, and the width of the second groove is not less than the width of the opening.

[0008] Preferably, the positioning groove is a rectangular recess, the opening is a rectangular opening, and the second groove is a rectangular groove; the conductive block is a rectangular conductive block, and the length of the conductive block matches the length of the rectangular groove and the width of the conductive block is less than the width of the rectangular groove; the sunken table is a rectangular sunken table, and the depth of the sunken table is less than or equal to the thickness of the relay base, and the width of the sunken table is less than the distance from the outermost soldering leg on the relay base to the edge of the relay base.

[0009] Preferably, third grooves are arranged on the left and right sides of the positioning groove.

[0010] Advantages of the present application:

[0011] 1. The electric spark wire cutting clamp has a simple structure, can realize quick mounting and dismounting of the relay soldering leg, has good conductivity, and has reliable positioning.

[0012] 2. The telescopic flat-end probe is adopted to realize reliable contact between the soldering leg and the probe, ensure good conductivity, and effectively reduce labor intensity without the need of copper wire winding for conducting electricity.

[0013] 3. The clamp can significantly improve labor productivity, effectively ensure product quality, save labor cost consumed by copper wire winding and copper wire dismounting, and has certain market competitiveness.

[0014] 4. The wire cutting clamp is suitable for wire cutting processing of relay bases of multiple varieties and specifications.

[0015] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an existing relay base;

[0017] Figure 2 It is a schematic diagram of a cutting part of a soldering leg on the base;

[0018] Figure 3 It is a structural schematic diagram of the present application;

[0019] Figure 4 It is a structural schematic diagram of the base;

[0020] Figure 5 It is a structural schematic diagram of the conductive block;

[0021] Figure 6 Fig. 1 is a schematic view of the structure of the application in operation.

[0022] Reference signs:

[0023] 1-base; 2-conductive block; 3-pressing screw; 4-welding leg; 5-probe; 6-bottom plate; 7-pressing plate; 1-1-positioning groove; 1-2-opening; 1-3-second groove; 1-4-third groove; 2-1-first groove; 2-2-sink. DETAILED DESCRIPTION

[0024] The application will be further described in conjunction with specific embodiments, but the embodiments of the application are not limited thereto.

[0025] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] Please also refer to Figures 3-6 The application provides a relay base upper welding leg electric spark wire cutting clamp, which specifically comprises a base 1 and a conductive block 2, the upper end of the base 1 is provided with a positioning groove 1-1, the rear end of the positioning groove 1-1 is provided with a pressing screw 3, the front end of the positioning groove 1-1 has an opening 1-2, the width of the opening 1-2 is smaller than the width of the relay base and larger than the overall width of the welding leg 4 on the base, so that the relay base can be matched with the positioning groove 1-1 and cannot be taken out of the opening 1-2 at the front end of the positioning groove 1-1, and the welding leg 4 to be cut can be smoothly stretched out of the opening 1-2 at the front end of the positioning groove 1-1.

[0027] The conductive block 2 is installed in the positioning groove 1-1, the end of the conductive block 2 towards the opening 1-2 is provided with a first groove 2-1, the groove bottom of the first groove 2-1 is horizontally inserted with a probe 5, the working end of the probe 5 is towards the direction of the slot of the first groove 2-1, and the probe 5 is oppositely arranged with the welding leg 4 on the relay base; one end of the welding leg 4 on the relay base abuts against the probe 5, and the end to be cut stretches out of the first groove 2-1.

[0028] The slot mouth of the first groove 2-1 has a sink 2-2, the shape of the sink 2-2 matches the shape of the relay base, the relay base is installed in the sink 2-2 and protrudes or is flush with the sink 2-2, and the welding leg 4 to be cut on the relay base faces the opening 1-2.

[0029] Preferably, the sink 2-2 is a rectangular sink, the relay base matching the sink 2-2 is a rectangular base, the depth of the sink 2-2 is less than or equal to the thickness of the relay base, and the width of the sink 2-2 is less than the distance from the outermost welding leg 4 on the relay base to the edge of the relay base, i.e. the width of the sink 2-2 at the left and right ends is less than the distance from the welding leg 4 on the left and right outer sides of the base plate 6 to the left and right edges of the base plate 6, and the width of the sink 2-2 at the upper and lower ends is less than the distance from the welding leg 4 on the upper and lower outer sides of the base plate 6 to the upper and lower edges of the base plate 6. The relay base is sunk into the sink 2-2, so that the base can reliably cooperate with the conductive block 2 during cutting work, avoiding shaking during the cutting process of the welding leg 4; at the same time, the probe 5 and the welding leg 4 can be aligned at one time without the need for secondary adjustment; in addition, the size of the sink 2-2 ensures that the positioning groove 1-1 can reliably contact the base plate 6 of the relay base, ensuring cutting accuracy.

[0030] Preferably, in order to avoid the probe 5 and the welding leg 4 from failing to contact due to length size errors of each welding leg 4, the probe 5 is a retractable flat probe, which can ensure that the plurality of probes 5 reliably contact the corresponding welding legs 4, and the contact end face of the probe 5 and the welding leg 4 is flat, which can increase the contact area with the welding leg 4. The retractable flat probe can ensure that each welding leg 4 can reliably conduct electricity with the conductive block 2. The model of the probe 5 is PH-4G.

[0031] Further, in order to make the machine tool electrode wire closer to the cut part, the thickness of the opening 1-2 at the front end of the positioning groove 1-1 is easily limited by the size of the cut welding leg 4, resulting in poor strength and easy deformation, thereby affecting the cutting accuracy. In order to solve this problem, a second groove 1-3 is provided below the opening 1-2, which penetrates the lower end face of the base 1 and the opening 1-2, the width of the second groove 1-3 is not less than the width of the opening 1-2, and at the same time, the relay welding leg 4 of the part to be cut is located outside the groove bottom of the second groove 1-3, i.e. exposed outside the clamp, so that the part to be cut and the electrode wire can reliably discharge when the machine tool performs wire cutting, thereby completing the cutting.

[0032] Preferably, the positioning groove 1-1 is a rectangular groove, the opening 1-2 is a rectangular opening, and the second groove 1-3 is a rectangular groove; the conductive block 2 is a rectangular conductive block, and the length of the conductive block 2 matches the length of the rectangular groove, and the width of the conductive block 2 is smaller than the width of the rectangular groove; the pressing screw 3 can push the conductive block 2 to slide in the length direction in the rectangular groove, and the conductive block 2 drives the relay base to move together, so as to fix the base on one side of the positioning groove 1-1, or loosen the relay base.

[0033] In order to make the conductive block 2 and the relay base smoothly enter or be taken out of the positioning groove 1-1, third grooves 1-4 are arranged on the left and right sides of the positioning groove 1-1, and the operator can put or take out the conductive block 2 and the relay base together through the third grooves 1-4.

[0034] Working process of the present application:

[0035] When the welding leg 4 needs to be cut by wire cutting, first, the cutting clamp is placed on the workbench of the wire cutting machine, the relative position between the clamp and the wire cutting machine is adjusted, the edge of the base 1 is pressed by the pressing plate 7 to fix it on the machine table, the conductive block 2 is taken out, the bottom plate 6 fixed with the welding leg 4 is inserted into the first groove 2-1 of the conductive block 2 and sinks into the sink 2-2 outside the groove periphery of the first groove 2-1, the end of the welding leg 4 to be cut is exposed outside the first groove 2-1, the other end of the welding leg 4 abuts against the probe 5 in the first groove 2-1, then the conductive block 2 and the base are put into the positioning groove 1-1 together, the pressing screw 3 is screwed to push the conductive block 2 and the base to move together until the bottom plate 6 on the relay base abuts against and is pressed against one side of the positioning groove 1-1, and the probe 5 abuts against the welding leg 4, so that the welding leg 4, the probe 5, the conductive block 2, the base 1 and the pressing screw 3 are in conduction, and together with the machine table of the wire cutting machine, they form an anode part, the electrode wire is a cathode, the machine is started to cut the welding leg 4 on the base, so that the length of the welding leg 4 reaches the requirement of the drawing. After the wire cutting is completed, the pressing screw 3 is rotated counterclockwise to loosen the conductive block 2, then the conductive block 2 and the base are taken out together, and the processed base is taken out from the conductive block 2.

[0036] In addition, the terms "first", "second", "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third" can explicitly or implicitly include one or more of the features.

[0037] The above is further detailed description of the present application in combination with specific preferred embodiments, and cannot be deemed as limitation of the specific implementation of the present application to these descriptions. For those skilled in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, and all should be deemed as falling within the protection scope of the present application.

Claims

1. A relay base on leg electric spark wire cutting clamp, characterized in that, The utility model relates to a relay base positioning device, including base and conductive block, the base upper end is equipped with positioning slot, the rear end of positioning slot is equipped with the screwdown screw, the front end of positioning slot has the opening, and the opening width is less than the width of relay base, the conductive block is installed in the positioning slot, the first recess is provided with the probe in the end of opening direction of the conductive block, and the probe is respectively with the welding leg on the relay base opposite setting, the first recess has the sunken platform in the groove mouth periphery, the shape of sunken platform is matched with the shape of relay base, the relay base is installed in the sunken platform, and makes the relay base protruding or flush with the sunken platform, and the welding leg of the relay base to cut is towards the opening, the probe is telescopic flat -headed probe, the opening below is provided with the second recess through the base lower end surface and the opening, and the width of second recess is not less than the width of opening.

2. The relay base up leg spark wire electrical discharge machining clamp according to claim 1, characterized in that, The positioning slot is rectangular sunken groove, the opening is rectangular opening, the second recess is rectangular recess, the conductive block is rectangular conductive block, and the length of conductive block is matched with the length of rectangular recess, and the width is less than the width of rectangular recess, the sunken platform is rectangular sunken platform, and the depth of sunken platform is less than or equal to the thickness of relay base, and the width of sunken platform is less than the distance of the outermost welding leg on the relay base to the edge of relay base.

3. The relay base up leg spark wire electrical discharge machining clamp according to claim 2, characterized in that, The left and right sides of the positioning slot are provided with third recesses.

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