A welding process for a differential pressure sensor tube base with double oil guide tubes

Abstract

The application discloses a welding process of a differential pressure sensor pipe base with double oil guide pipes and relates to the technical field of sensor welding. A laser device is started, and the laser is vertically irradiated on a welding seam formed by a reserved step hole and a vertically inserted step type oil guide pipe; a rotating base clamped by the differential pressure sensor pipe base is uniformly rotated at a constant speed, so that the laser is uniformly irradiated on the welding seam to form an annular welding spot; and the welding state is observed through a display screen during the welding process; the power supply of the laser welding is disconnected when the welding is completed, and the welding flux at the welding seam of the step type oil guide pipe and the reserved step hole of the differential pressure sensor pipe base is cooled. The step pipe is vertically dropped into a product base step hole, and then vertical welding is performed at the step gap, so that the mutual shielding of the lead oil guide pipes during welding is avoided, the integrity of the welding is ensured, and welding parameters can be adjusted according to the pressure requirements of customers to meet the needs of customers for different oil pipe pressures.

Description

Technical Field

[0001] This invention relates to the field of sensor welding technology, specifically to a welding process for a differential pressure sensor housing with dual oil guide pipes. Background Technology

[0002] In industries such as electrical engineering and instrumentation, pressure differential control of containers and equipment is frequently required. Differential pressure sensors are often used in this context. For the oil guide tube within the sensor, brazing or glass encapsulation are commonly employed. Brazing: The surfaces of both the welding and soldering parts require plating (i.e., the welding area needs a solderable metal coating). Brazing filler is then applied to the welding area. Once melted, the brazing filler connects the welding and soldering parts, achieving sealing and tensile strength requirements. Disadvantages: The surfaces of both the welding and soldering parts require pretreatment; brazing strength is relatively low, suitable for low-pressure, low-sealing products. Glass encapsulation: Glass encapsulation technology connects the product base to the oil guide tube. Advantages: Simple process; Disadvantages: ① Glass material is brittle and prone to cracking; ② The connection strength between glass and metal is low. For products requiring high pressure resistance, the glass preform needs a large contact area with the product base and oil guide tube to increase tensile strength. Since differential pressure sensors have multiple leads and oil guide tubes, this process is not ideal. Based on the advantages and disadvantages of brazing and glass encapsulation processes, we propose a welding process for differential pressure sensor sockets with dual oil guide tubes to address the shortcomings of the aforementioned processes. Furthermore, the structure of the oil guide tubes has been optimized to prevent obstruction between the leads and the oil guide tubes during welding, ensuring the reliability and sealing of the product's connection. Summary of the Invention

[0003] To address the aforementioned issue where the welding of the lead wire and oil guide tube is obstructed during welding, preventing complete welding of the welded area and compromising the product's connection reliability and sealing, this invention provides the following technical solution: a welding process for a differential pressure sensor socket with dual oil guide tubes, comprising the following steps:

[0004] Step 1, Preliminary Preparations:

[0005] S1. Selection of the model of differential pressure sensor socket and stepped oil guide pipe;

[0006] S2. Select a rotating base suitable for holding the differential pressure sensor tube socket in S1;

[0007] S3. Select a visual laser welding equipment; (not limited to laser welding, applicable to any welding method)

[0008] Step 2, Welding Preparation:

[0009] S1. Clean and degrease the stepped oil guide tube to be welded, and remove impurities for lead wire welding.

[0010] S2. Insert the larger diameter end of the stepped oil guide pipe to be welded vertically into the reserved stepped hole in the differential pressure sensor pipe seat, and make sure the weld is directly above it.

[0011] S3. Place the differential pressure sensor socket with the stepped oil guide tube inserted in S1 onto the rotating base in step one for fixation.

[0012] S4. Adjust the welding parameters of the visualization laser welding equipment in step one, including welding current, welding speed, welding temperature, as well as image size and image shooting angle.

[0013] S5. Adjust the angle between the laser welding head and the stepped oil guide tube so that the weld formed by the reserved stepped hole and the vertically inserted stepped oil guide tube is perpendicular to the laser.

[0014] Step 3: Weld the stepped oil guide tube to the differential pressure sensor socket:

[0015] S1. Start the laser equipment and irradiate the weld seam formed by the reserved stepped hole and the vertically inserted stepped oil guide pipe.

[0016] S2. By rotating the base held by the differential pressure sensor tube seat at a constant speed, the laser is evenly irradiated on the weld seam to form a ring weld point. The welding status is observed through the display screen during the welding process.

[0017] S3. When the welding is finished, disconnect the power supply of the laser welding and wait for the flux at the weld seam of the stepped oil guide pipe and the reserved stepped hole of the differential pressure sensor pipe seat to cool down.

[0018] Furthermore, in step two S1, the stepped oil guide tube protrusion is cleaned and degreased to remove impurities from the lead wire welding.

[0019] Furthermore, in step two, S4, the angle between the laser welding head and the stepped oil guide tube is adjusted, wherein the laser beam and the center line of the stepped oil guide tube are parallel to each other.

[0020] Furthermore, in step three, S2, the laser is uniformly irradiated onto the weld by rotating the differential pressure sensor tube holder at a constant speed. The uniform rotation can be performed manually or by an external motor. The rotation direction of the rotating base is a circular motion around the center line of the stepped oil guide pipe.

[0021] A sensor base for welding differential pressure sensor bases with dual oil guide pipes includes a differential pressure sensor base, the top of which has several sets of lead holes, and the top surface of which has two sets of stepped holes, with stepped oil guide pipes vertically inserted into the interior of the stepped holes.

[0022] Beneficial effects

[0023] The present invention has the following beneficial effects:

[0024] The welding process for this differential pressure sensor housing with dual oil guide tubes improves accuracy and consistency by modifying the original oil guide tube structure to a stepped design and adjusting the angle between the laser welding head and the stepped oil guide tube to ensure the weld seam is perpendicular to the laser. This replaces brazing with laser welding, reducing the need for electroplating on stainless steel and avoiding the poor sealing issues associated with brazing. By vertically inserting the stepped tube into the stepped hole of the product base and then vertically welding at the stepped gap, mutual obstruction of the various lead oil guide tubes during welding is avoided, ensuring weld integrity. Furthermore, welding parameters can be adjusted to meet different oil pipe pressure requirements.

[0025] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the welding process flow of the present invention;

[0027] Figure 2 This is a schematic diagram of the differential pressure sensor tube holder structure in this invention.

[0028] In the diagram, 1 is the differential pressure sensor housing; 2 is the lead wire hole; 3 is the stepped hole; and 4 is the stepped oil guide pipe. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0031] Please see Figure 1-2 This invention provides a technical solution: a welding process for a differential pressure sensor socket with dual oil guide pipes, comprising the following steps:

[0032] Step 1, Preliminary Preparations:

[0033] S1. Selection of the model of differential pressure sensor socket and stepped oil guide pipe;

[0034] S2. Select a rotating base suitable for holding the differential pressure sensor tube socket in S1;

[0035] S3. Select a visual laser welding equipment;

[0036] The welding equipment can also be selected from argon arc welding and electron beam welding, depending on the specific welding requirements.

[0037] Step 2, Welding Preparation:

[0038] S1. Clean and degrease the stepped oil guide tube to be welded, and remove impurities for lead wire welding.

[0039] S2. Insert the larger diameter end of the stepped oil guide pipe to be welded vertically into the reserved stepped hole in the differential pressure sensor pipe seat, and make sure the weld is directly above it.

[0040] S3. Place the differential pressure sensor socket with the stepped oil guide tube inserted in S1 onto the rotating base in step one for fixation.

[0041] S4. Adjust the welding parameters of the visualization laser welding equipment in step one, including welding current, welding speed, welding temperature, as well as image size and image shooting angle.

[0042] S5. Adjust the angle between the laser welding head and the stepped oil guide tube so that the weld formed by the reserved stepped hole and the vertically inserted stepped oil guide tube is perpendicular to the laser.

[0043] Step 3: Weld the stepped oil guide tube to the differential pressure sensor socket:

[0044] S1. Start the laser equipment and irradiate the weld seam formed by the reserved stepped hole and the vertically inserted stepped oil guide pipe.

[0045] S2. By rotating the base held by the differential pressure sensor tube seat at a constant speed, the laser is evenly irradiated on the weld seam to form a ring weld point. The welding status is observed through the display screen during the welding process.

[0046] S3. When the welding is finished, disconnect the power supply of the laser welding and wait for the flux at the weld seam of the stepped oil guide pipe and the reserved stepped hole of the differential pressure sensor pipe seat to cool down.

[0047] This process, by adjusting the angle between the laser welding head and the stepped oil guide tube, ensures that the weld seam is perpendicular to the laser, thus improving the precision and consistency of the welding. Using visual laser welding equipment, the welding process can be monitored in real time, ensuring weld quality and reducing welding defects.

[0048] In step two S1, the raised part of the stepped oil guide tube is cleaned and degreased to remove impurities from the lead wire welding.

[0049] In this implementation scheme, the connection and sealing of the welded joint are ensured by deoxidizing the protruding part of the stepped oil guide pipe.

[0050] In step two, S4, adjust the angle between the laser welding head and the stepped oil guide tube, wherein the laser beam and the center line of the stepped oil guide tube are parallel to each other.

[0051] In step three, S2, the rotating base held by the differential pressure sensor tube seat is rotated at a constant speed so that the laser is evenly irradiated on the weld. The constant speed rotation can be done manually or by an external motor. The rotation direction of the rotating base is a circular motion with the center line of the stepped oil guide pipe as the axis.

[0052] In this embodiment, the rotation direction of the rotating base is a circular motion with the center line of the stepped oil guide pipe as the axis, which avoids mutual obstruction of each lead oil guide pipe during welding and ensures the integrity of the welding.

[0053] The rotating base can be used as a welding solution, or the laser welding angle can be adjusted by controlling the rotation angle of the external robotic arm of the laser head. The laser can perform welding by making circular motion along the center line of the stepped oil guide pipe.

[0054] A differential pressure sensor socket for use in the welding process of a differential pressure sensor socket with dual oil guide pipes includes a differential pressure sensor base 1. The top of the differential pressure sensor base 1 is provided with several sets of lead holes 2. The top surface of the differential pressure sensor base 1 is provided with two sets of stepped holes 3. A stepped oil guide pipe 4 is vertically inserted into the interior of the stepped holes 3.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A differential pressure sensor tube carrier welding process with dual oil feed tubes, characterized by, It comprises the following steps: Step one, preliminary work: S1, differential pressure sensor tube seat and step type oil guide pipe model selection; S2, select the rotating base suitable for clamping the differential pressure sensor tube seat in S1; S3, select the visual laser welding equipment; Step two, welding preparation: S1, clean and degrease the step type oil guide pipe to be welded, remove the impurities of lead welding; S2, the larger diameter end of the step type oil guide pipe to be welded is vertically inserted into the reserved step hole of the differential pressure sensor tube seat, and the weld is vertically above; S3, the differential pressure sensor tube seat with step type oil guide pipe inserted in S1 is placed in the rotating base in step one for fixation; S4, adjust the welding parameters of the visual laser welding equipment in step one, including welding current, welding speed, welding temperature, and image size and image shooting angle; S5, adjust the angle of the laser welding head and the step type oil guide pipe, so that the weld formed by the reserved step hole and the vertically inserted step type oil guide pipe is perpendicular to the laser; Step three, welding of step type oil guide pipe and differential pressure sensor tube seat: S1, start the laser equipment, and the laser is vertically irradiated on the weld formed by the reserved step hole and the vertically inserted step type oil guide pipe; S2, rotate the rotating base clamped by the differential pressure sensor tube seat at a constant speed, so that the laser is uniformly irradiated on the weld, forming a ring weld point. During the welding process, the welding state is observed through the display screen; S3, turn off the power of the laser welding when the welding is completed, and wait for the flux at the weld of the step type oil guide pipe and the reserved step hole of the differential pressure sensor tube seat to cool down; In S2 of step three, the rotating base clamped by the differential pressure sensor tube seat is rotated at a constant speed, so that the laser is uniformly irradiated on the weld. The constant speed rotation can be achieved by manual rotation or external motor operation. The rotating direction of the rotating base is the circular motion with the center line of the step type oil guide pipe as the axis.

2. The differential pressure sensor tube carrier welding process with dual oil feed tubes of claim 1, wherein: In S1 of step two, the step type oil guide pipe protrusion is cleaned, degreased and impurities of lead welding are removed to ensure the welding quality.

3. The differential pressure sensor tube carrier welding process with dual oil feed tubes of claim 1, wherein: In S4 of step two, the angle of the laser welding head and the step type oil guide pipe is adjusted, and the laser beam is parallel to the center line of the step type oil guide pipe.

4. A differential pressure sensor cartridge for use in the welding process of a differential pressure sensor cartridge with double oil ducts according to any one of claims 1 to 3, comprising a differential pressure sensor base (1), characterized in that The top of the differential pressure sensor base (1) is provided with a plurality of lead holes (2), and the top surface of the differential pressure sensor base (1) is provided with two step holes (3), and the step type oil guide pipe (4) is vertically inserted into the inside of the step hole (3).

Images