A device for the clinching of a bracket and a nut for catalytic converters

Abstract

This utility model provides a device for spot welding a catalyst support and a nut, which can effectively control the inward shrinkage of the catalyst support and avoid deformation of the catalyst support due to uneven temperature. It includes an upper electrode and a lower electrode that cooperate with each other. The lower electrode is provided with a positioning pin, which can position the nut and the support. The upper electrode is characterized by having an inner support fixed on it, and a wear-resistant ring is fixed on the outer side of the inner support. The outer diameter of the wear-resistant ring matches the size of the catalyst support. During welding, the wear-resistant ring can support the support in the catalyst support and limit the legs of the catalyst support to prevent the legs of the catalyst support from shrinking inward.

Description

Technical Field

[0001] This utility model relates to the technical field of exhaust gas catalyst production equipment, specifically to a device for welding a catalyst support and nut together. Background Technology

[0002] Diesel engine aftertreatment devices that meet emission regulations must be equipped with differential pressure sensors, exhaust temperature sensors, and NO sensors. X Sensors and wiring harnesses, etc., are designed and developed using integrated wiring harness brackets based on the vehicle boundary conditions and the installation locations of the sensors and wiring harnesses.

[0003] For example, Chinese utility model patent CN219164100U discloses an integrated wiring harness bracket for an exhaust aftertreatment device, which discloses a U-shaped bracket for fixing sensors and wiring harnesses to a catalytic converter. Figure 1 As shown, nuts need to be welded onto the catalyst support to facilitate the fixing of various components.

[0004] exist Figure 2 In the traditional spot welding process for nuts, the nut's antennae melt and weld onto the U-shaped support when the upper and lower electrodes come into contact. The high temperature generated during this process causes the U-shaped support to deform, with the support legs at both ends of the catalyst support shrinking by up to 2mm. Additional calibration procedures are required to stabilize the support dimensions, increasing production costs and time. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a device for spot welding a catalyst support and a nut, which can effectively control the inward shrinkage of the catalyst support and prevent deformation of the catalyst support due to uneven temperature.

[0006] The technical solution is as follows: a device for spot welding a catalyst support and a nut, comprising an upper electrode and a lower electrode that cooperate with each other, wherein a positioning pin is provided on the lower electrode, the positioning pin being able to position the nut and the support, characterized in that an inner support is fixed on the upper electrode, and a wear-resistant ring is fixed on the outer side of the inner support, the outer diameter of the wear-resistant ring being matched with the size of the catalyst support, wherein during welding, the wear-resistant ring can support the support in the catalyst support and limit the legs of the catalyst support to prevent the legs of the catalyst support from retracting inward.

[0007] Furthermore, the wear-resistant ring and the inner support are bonded together with high-temperature resistant adhesive.

[0008] Furthermore, the wear-resistant ring is made of alloy tool steel.

[0009] Furthermore, cooling pipes are respectively provided inside the upper electrode and the lower electrode, and the cooling pipes are respectively connected to a coolant inlet and a coolant outlet.

[0010] Furthermore, the upper electrode and the inner support are respectively provided with mounting holes, and the inner support is installed on the upper electrode by screws engaging with the mounting holes.

[0011] Furthermore, the wear-resistant ring and the inner support member are respectively provided with beveled surfaces that can cooperate with each other.

[0012] Furthermore, the outer diameter of the wear-resistant ring is larger than the distance between the two legs of the catalyst support, so that the catalyst support can be secured to the wear-resistant ring.

[0013] Furthermore, the upper electrode is connected to a driving mechanism, which can drive the upper electrode to rise and fall to cooperate with the lower electrode for spot welding.

[0014] Furthermore, it also includes a discharge mechanism, which includes a discharge ring. The discharge ring is fixed on a fixing device located on one side of the upper electrode. The upper electrode is located inside the discharge ring. After welding is completed, when the driving mechanism drives the upper electrode to lift, the catalyst support that is stuck on the wear ring contacts the discharge ring, and then separates from the wear ring to complete the discharge.

[0015] This utility model discloses a device for spot welding catalyst support and nuts. Through the mechanical support of the inner support component and wear-resistant ring, it provides rigid constraints, limiting the shrinkage of the catalyst support at high temperatures and preventing dimensional deformation. This reduces calibration steps, lowers production costs and time, and improves production efficiency while ensuring product quality. The double-layer structure design of the inner support component and wear-resistant ring concentrates wear on the highly wear-resistant ring, further reducing overall wear and improving the durability and economy of the support structure. The inner support component is fixed to the upper electrode with screws, accommodating supports of various sizes and shapes, enhancing the versatility and practicality of the device, allowing one set of equipment to meet the production needs of multiple types of supports. Furthermore, it can cooperate with an unloading mechanism to automatically detach the catalyst support from the wear-resistant ring of the support structure after spot welding, automatically completing the unloading process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a support for a catalyst;

[0017] Figure 2 A schematic diagram of a traditional spot welding nut welding device;

[0018] Figure 3 This is a perspective view of a device for welding a support and nut for a catalyst in one embodiment;

[0019] Figure 4 This is a front view of an apparatus for welding a support and nut for a catalyst in one embodiment;

[0020] Figure 5 for Figure 4 A cross-sectional view along the AA direction;

[0021] Figure 6 This is a perspective view of an apparatus for welding a support and nut for a catalyst, according to another embodiment.

[0022] Figure 7 This is a front view of an apparatus for welding a support to a nut for a catalyst, according to another embodiment.

[0023] Figure 8 A side view of an apparatus for welding a support to a nut for a catalyst, according to another embodiment;

[0024] Figure 9 This is a perspective view of the inner support member in the embodiment. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Those skilled in the art can understand other advantages and effects of this invention from the content disclosed in this specification. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0026] See Figure 3 , 4 5, 9. A device for spot welding a catalyst support 100 and a nut according to the present invention includes an upper electrode 1 and a lower electrode 2 that cooperate with each other. A positioning pin 3 is provided on the lower electrode 2. The positioning pin 3 can position the nut 100 and the catalyst support 200. An inner support 4 is fixed on the upper electrode 2. A wear-resistant ring 5 is fixed on the outer side of the inner support 4. The outer diameter of the wear-resistant ring 5 matches the size of the catalyst support 200. Matching the size means that the outer diameter of the wear-resistant ring 5 is close to the distance between the two legs of the catalyst support 200. The wear-resistant ring 5 can extend between the two legs of the catalyst support 200. During welding, the wear-resistant ring 5 can support the catalyst support 200 and limit the legs 201 of the catalyst support to prevent the legs 201 of the catalyst support from shrinking inward.

[0027] In this embodiment, the inner support 4 effectively controls the inward contraction of the catalyst support 200, preventing dimensional deformation caused by uneven temperature. The inner support structure provides rigid constraints to the workpiece through mechanical support, limiting the free contraction of the catalyst support 200 at high temperatures and preventing dimensional deformation. The device in this embodiment is not only applicable to… Figure 1 The catalyst support shown can be used for other support components that are prone to deformation during welding, as provided in the embodiments for spot welding of the catalyst support and nut.

[0028] In this embodiment, a wear-resistant ring 5 is also fixed to the outside of the inner support 4. The wear-resistant ring 5 is made of alloy tool steel. The alloy tool steel can be any one of Cr12MoV, Cr12, SKD11, DC53, H13, D2 steel, and SKD11. It has high hardness and high wear resistance, and can withstand multiple frictions with the workpiece without wear. It can significantly extend the service life of the support structure. The double-layer inner support combination design concentrates the wear on the wear-resistant ring 5, which has higher wear resistance.

[0029] In this embodiment, the wear-resistant ring 5 and the inner support 4 are bonded together with high-temperature resistant adhesive. The high-temperature resistant adhesive can be such as polyimide adhesive, phenolic resin adhesive, silicone potting compound, epoxy resin adhesive, etc. The insulating adhesive layer between the wear-resistant ring 5 and the inner support 4 also forms an insulating layer, preventing adhesion problems between the workpiece and the support structure. The insulating adhesive layer has excellent insulation properties, effectively isolating the conductive path between the support structure and the workpiece, preventing current from flowing through the inner support structure to the electrode, thus avoiding the problem of high temperature causing the workpiece to melt and adhere to the support structure. This ensures that the welding current only passes through the electrode and the workpiece.

[0030] Meanwhile, the high-temperature resistant adhesive, as a filler material, also plays a role in fixing and preventing the support structure from loosening. The high-temperature resistant adhesive also acts as a temperature buffer. The high-temperature resistant adhesive is located in the middle area between the wear-resistant ring 5 and the inner support 4, and does not come into direct contact with the electrode. Therefore, the actual temperature that the high-temperature resistant adhesive withstands is much lower than the peak temperature at the moment of welding, which can reduce the impact of high temperature on the high-temperature resistant adhesive and enable it to have a long-term stable and reliable bonding effect.

[0031] In this embodiment, the wear-resistant ring 5 and the inner support member 4 are respectively provided with beveled surfaces 6 that can cooperate with each other, so as to facilitate the application of high-temperature resistant adhesive.

[0032] In this embodiment, mounting holes 7 are provided on the upper electrode 1 and the inner support 4 respectively. The inner support 4 is installed on the upper electrode 1 by screws 8 cooperating with the mounting holes 7, which facilitates adjustment and replacement and can reduce maintenance costs.

[0033] See Figure 5 In this embodiment, cooling pipes 9 are respectively provided in the upper electrode 1 and the lower electrode 2. The cooling pipes 9 are respectively connected to the coolant inlet 10 and the coolant outlet 11, and are cooled by water circulation to avoid the electrode temperature from getting too high.

[0034] See Figure 6 , 7 8. In one embodiment of this utility model, the outer diameter of the wear-resistant ring 5 is set to be larger than the distance between the two legs of the catalyst support 200. It is only necessary to set the outer diameter of the wear-resistant ring 5 to be slightly larger than the distance between the two legs of the catalyst support 200 to produce a tight fit effect, so that the catalyst support 200 can be clamped on the wear-resistant ring 5.

[0035] In this embodiment, the upper electrode 1 is connected to a driving mechanism (not shown in the figure). The driving mechanism can drive the upper electrode 1 to rise and fall to cooperate with the lower electrode 2 for spot welding. The driving mechanism can be a cylinder or a linear module or other equipment.

[0036] The device for welding the catalyst support and nut in the embodiment also includes a discharge mechanism. The discharge mechanism includes a discharge ring 12, which is fixed on a fixing device 13 located on one side of the upper electrode 1. The upper electrode 1 is located inside the discharge ring 12. After the welding is completed, when the drive mechanism drives the upper electrode 1 to lift, since the catalyst support 200 is clamped on the wear ring 5, the catalyst support 200 and the wear ring 5 are lifted together. During the lifting of the upper electrode 1, the catalyst support 200 clamped on the wear ring 5 comes into contact with the discharge ring. Under the restriction of the discharge ring 12, the catalyst support 200 and the wear ring 5 are separated to complete the discharge. The unloading ring 12 is formed by bending a cylinder, which has a low manufacturing cost. The cylindrical surface of the unloading ring 12 does not damage the outer surface of the workpiece. After the spot welding is completed, the workpiece is automatically removed from the wear-resistant ring 5. When the drive mechanism drives the upper electrode to return, the force generated by the return stroke and the unloading mechanism work together to achieve rapid separation of the catalyst support 200. No manual operation is required, which improves production efficiency.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for butt welding a support and a nut for a catalyst, comprising an upper electrode and a lower electrode that cooperate with each other, wherein a positioning pin is provided on the lower electrode, the positioning pin being capable of positioning the nut and the support, characterized in that, An inner support is fixed on the upper electrode, and a wear-resistant ring is fixed on the outer side of the inner support. The outer diameter of the wear-resistant ring matches the size of the catalyst support. During welding, the wear-resistant ring can support the support legs of the catalyst support and limit their movement.

2. A device for butt welding of a bracket and a nut for catalytic converters according to claim 1, characterized in that: The wear-resistant ring and the inner support are bonded together with high-temperature resistant adhesive.

3. A device for butt welding of bracket and nut for catalytic converter as claimed in claim 1 wherein: The wear-resistant ring is made of alloy tool steel.

4. A device for butt welding of bracket and nut for catalytic converter as claimed in claim 1 wherein: Cooling pipes are respectively provided inside the upper electrode and the lower electrode, and the cooling pipes are respectively connected to a coolant inlet and a coolant outlet.

5. A device for butt welding of bracket and nut for catalytic converter as claimed in claim 1 wherein: The upper electrode and the inner support are respectively provided with mounting holes, and the inner support is installed on the upper electrode by screws engaging with the mounting holes.

6. A device for butt welding of bracket and nut for catalytic converter as claimed in claim 1 wherein: The wear-resistant ring and the inner support member are respectively provided with beveled surfaces that can cooperate with each other.

7. A device for butt welding of bracket and nut for catalytic converter as claimed in claim 1 wherein: The outer diameter of the wear-resistant ring is larger than the distance between the two legs of the catalyst support, so that the catalyst support can be secured to the wear-resistant ring.

8. The device for spot welding a catalyst support and a nut according to claim 1, characterized in that: The upper electrode is connected to a driving mechanism, which can drive the upper electrode to rise and fall to cooperate with the lower electrode for spot welding.

9. A device for butt welding of a bracket and a nut for catalytic converters according to claim 8, characterized in that: It also includes a discharge mechanism, which includes a discharge ring. The discharge ring is fixed on a fixing device located on one side of the upper electrode. The upper electrode is located inside the discharge ring. After welding is completed, when the driving mechanism drives the upper electrode to lift, the catalyst support stuck on the wear ring contacts the discharge ring, and then separates from the wear ring to complete the discharge.

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