Welding process for differential pressure sensor tube socket with double oil guide tubes

Abstract

The invention discloses a welding process for a differential pressure sensor tube socket with double oil guide tubes, and relates to the technical field of sensor welding. Laser equipment is started, and laser vertically irradiates a weld joint formed by the reserved stepped hole and the vertically-inserted stepped oil guide pipe; the rotary base clamped by the differential pressure sensor tube base is rotated at a constant speed, so that laser is uniformly irradiated on a weld joint to form an annular welding spot, and the welding state is observed through the display screen in the welding process; and when welding is finished, a laser welding power supply is cut off, and the welding flux at the welding seam of the reserved stepped holes of the stepped oil guide pipe and the differential pressure sensor pipe seat is cooled. The step pipe vertically falls into the step hole of the product base, and then vertical welding is carried out at the step gap, so that mutual shielding of the lead oil guide pipes during welding is avoided, the welding integrity is ensured, and the requirements of customers on different oil pipe pressures can be met by adjusting welding parameters according to the requirements of the customers on the pressure.

Description

Technical Field

[0001] The invention relates to the technical field of sensor welding, in particular to a welding process for a differential pressure sensor pipe seat with double oil guide pipes. Background Art

[0002] In the electrical, instrumentation and other industries, it is often required to control the pressure difference of containers and equipment. At this time, differential pressure sensors are often used. For the oil guide pipe in the sensor, brazing process or glass packaging process is currently often used. Brazing process: First, the surface of the welding part and the welded part needs to be plated (that is, the welding position needs to be plated with a solderable metal coating on the surface) and the brazing material is filled in the welding position. After the brazing material melts, the welding part and the welded part are connected to meet the sealing and tensile resistance requirements. Process disadvantages: The surface of the welded part and the welded part needs to be pre-treated; the brazing strength is relatively low, which is suitable for low-pressure and low-sealing products; glass packaging process: glass sealing technology is used to connect the product base and the oil guide pipe. Advantages: simple process; Disadvantages: ① Glass material characteristics, relatively brittle and easy to crack; ② The connection strength between glass and metal is low. If it is necessary to withstand high-pressure products, the glass embryo needs to have a larger contact surface with the product base and the oil guide pipe to increase the tension. Because there are multiple leads and oil guide pipes distributed on the differential pressure sensor product. Based on the advantages and disadvantages of the brazing process and the glass packaging process, we propose a differential pressure sensor socket welding process with double oil guide tubes to solve the shortcomings of the above processes. The oil guide tube structure is optimized to solve the shielding between the lead wire and the oil guide tube during the welding process, ensuring the connection reliability and sealing of the product. Summary of the invention

[0003] In order to solve the above-mentioned problem that the lead wire and the oil guide tube are blocked during welding, the welding position cannot be completely welded, and the connection reliability and sealing of the product cannot be guaranteed, the present invention is implemented through the following technical scheme: A welding process for a differential pressure sensor socket with double oil guide tubes, comprising the following steps:

[0004] Step 1: Preliminary preparations:

[0005] S1. Model selection of differential pressure sensor socket and stepped oil guide pipe;

[0006] S2, select a rotating base suitable for clamping the differential pressure sensor pipe socket in S1;

[0007] S3. Choose 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 pipe to be welded, and remove impurities from lead welding;

[0010] S2. Insert the end of the stepped oil pipe with a larger diameter to be welded vertically into the reserved stepped hole of the differential pressure sensor socket, and make the weld just above;

[0011] S3, placing the differential pressure sensor pipe seat connected with the stepped oil guide pipe in S1 on the rotating base in step 1 for fixing;

[0012] S4, adjusting the welding parameters of the visual laser welding equipment in step 1, including welding current, welding speed, welding temperature, and imaging size and image shooting angle;

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

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

[0015] S1. Start the laser equipment and irradiate the laser vertically on the weld formed by the reserved step hole and the vertically plugged step oil guide pipe;

[0016] S2. The rotating base clamped by the differential pressure sensor tube holder is rotated at a constant speed to make the laser irradiate the weld evenly to form a ring-shaped welding point. The welding status is observed through the display screen during the welding process.

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

[0018] Furthermore, in step 2 S1, the raised portion of the stepped oil guide pipe is cleaned and degreased to remove impurities from lead welding.

[0019] Furthermore, in step 2 S4, the angle between the laser welding head and the stepped oil guide pipe is adjusted, wherein the laser beam and the center line of the stepped oil guide pipe are parallel to each other.

[0020] Furthermore, in step three S2, the laser is evenly irradiated on the weld by uniformly rotating the rotating base clamped by the differential pressure sensor tube holder, wherein the uniform rotation can be performed manually or by an external motor, wherein the rotation direction of the rotating base is a circular motion with the center line of the stepped oil guide pipe as the axis.

[0021] A sensor tube seat used in a welding process for a differential pressure sensor tube seat with double oil guide tubes comprises a differential pressure sensor base, a top of which is provided with a plurality of groups of lead holes, a top surface of which is provided with two groups of step holes, and stepped oil guide tubes are vertically inserted into the inside of the step holes.

[0022] Beneficial Effects

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

[0024] The welding process of the differential pressure sensor socket with double oil guide pipes changes the original oil guide pipe structure, adopts a stepped oil guide pipe, adjusts the angle between the laser welding head and the stepped oil guide pipe, ensures that the weld and the laser are perpendicular to each other, improves the accuracy and consistency of welding, and reduces the electroplating treatment of stainless steel by replacing brazing with laser welding, avoiding the problem of poor sealing caused by the brazing process. By vertically dropping the step pipe into the step hole of the product base and then performing vertical welding at the step gap, the mutual shielding of the lead oil guide pipes during welding is avoided, ensuring the integrity of the welding. The welding parameters can also be adjusted according to the customer's pressure requirements to meet the customer's needs for different oil pipe pressures.

[0025] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 2 It is a schematic diagram of the structure of the differential pressure sensor tube base in the present invention.

[0028] In the figure, 1. Differential pressure sensor tube socket; 2. Lead hole; 3. Step hole; 4. Step oil guide pipe. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] See also Figure 1-2 The embodiment of the present invention provides a technical solution: a welding process for a differential pressure sensor socket with double oil guide pipes, comprising the following steps:

[0032] Step 1: Preliminary preparations:

[0033] S1. Model selection of differential pressure sensor socket and stepped oil guide pipe;

[0034] S2, select a rotating base suitable for clamping the differential pressure sensor pipe socket in S1;

[0035] S3. Select visual laser welding equipment;

[0036] The welding equipment can also be argon arc welding or electron beam welding, and the welding equipment can be selected according to different welding requirements.

[0037] Step 2: Welding preparation:

[0038] S1. Clean and degrease the stepped oil guide pipe to be welded, and remove impurities from lead welding;

[0039] S2. Insert the end of the stepped oil pipe with a larger diameter to be welded vertically into the reserved stepped hole of the differential pressure sensor socket, and make the weld just above;

[0040] S3, placing the differential pressure sensor pipe seat connected with the stepped oil guide pipe in S1 on the rotating base in step 1 for fixing;

[0041] S4, adjusting the welding parameters of the visual laser welding equipment in step 1, including welding current, welding speed, welding temperature, and imaging size and image shooting angle;

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

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

[0044] S1. Start the laser equipment and irradiate the laser vertically on the weld formed by the reserved step hole and the vertically plugged step oil guide pipe;

[0045] S2. The rotating base clamped by the differential pressure sensor tube holder is rotated at a constant speed to make the laser irradiate the weld evenly to form a ring-shaped welding point. The welding status is observed through the display screen during the welding process.

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

[0047] This process improves the accuracy and consistency of welding by adjusting the angle between the laser welding head and the stepped oil guide pipe to ensure that the weld and the laser are perpendicular to each other. Using visual laser welding equipment, the welding process can be monitored in real time to ensure the quality of the weld and reduce welding defects.

[0048] In step 2 S1, the raised portion of the stepped oil guide pipe is cleaned and degreased to remove impurities from lead welding.

[0049] In this embodiment, the connectivity and sealing of the welding point are ensured by performing a deoxidation treatment on the raised portion of the stepped oil guide pipe.

[0050] In step 2, in S4, the angle between the laser welding head and the stepped oil guide pipe is adjusted, wherein the laser beam and the center line of the stepped oil guide pipe are parallel to each other.

[0051] In step three, in S2, the laser is evenly irradiated on the weld by uniformly rotating the rotating base clamped by the differential pressure sensor tube holder, wherein the uniform rotation can be performed manually or by an external motor, wherein 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 to make a circular motion with the center line of the stepped oil guide pipe as the axis, that is, the mutual shielding of the lead oil guide pipes during welding is avoided, and the integrity of the welding is ensured;

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

[0054] A differential pressure sensor pipe socket used in a differential pressure sensor pipe socket welding process with double oil guide pipes comprises a differential pressure sensor base 1, a plurality of groups of lead holes 2 are opened on the top of the differential pressure sensor base 1, two groups of step holes 3 are opened on the top surface of the differential pressure sensor base 1, and stepped oil guide pipes 4 are vertically inserted into the inside of the step holes 3.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0056] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A welding process for a differential pressure sensor socket with double oil guide pipes, characterized in that: The steps include: Step 1: Preliminary preparations: S1. Model selection of differential pressure sensor socket and stepped oil guide pipe; S2, selecting a rotating base suitable for clamping the differential pressure sensor pipe socket in S1; S3. Select visual laser welding equipment; Step 2: Welding preparation: S1. Clean and degrease the stepped oil guide pipe to be welded, and remove impurities from lead welding; S2. Insert the end of the stepped oil pipe with a larger diameter to be welded vertically into the reserved stepped hole of the differential pressure sensor socket, and make the weld just above; S3, placing the differential pressure sensor pipe seat connected with the stepped oil guide pipe in S1 on the rotating base in step 1 for fixing; S4, adjusting the welding parameters of the visual laser welding equipment in step 1, including welding current, welding speed, welding temperature, imaging size, image shooting angle, etc.; S5. Adjust the angle between the laser welding head and the stepped oil guide pipe so that the weld formed by the reserved step hole and the vertically plugged stepped oil guide pipe is perpendicular to the laser. Step 3: Weld the stepped oil guide pipe to the differential pressure sensor socket: S1. Start the laser equipment and irradiate the laser vertically on the weld formed by the reserved step hole and the vertically plugged step oil guide pipe; S2. The rotating base clamped by the differential pressure sensor tube holder is rotated at a constant speed to make the laser irradiate the weld evenly to form a ring-shaped welding point. The welding status is observed through the display screen during the welding process. S3. When welding is finished, disconnect the power supply of the laser welding and wait for the flux at the weld of the reserved step hole between the stepped oil guide pipe and the differential pressure sensor socket to cool down.

2. The welding process for a differential pressure sensor socket with double oil guide pipes according to claim 1 is characterized in that: In step 2 S1, the raised portion of the stepped oil guide pipe is cleaned and degreased to remove impurities from lead welding to ensure welding quality.

3. The welding process for a differential pressure sensor socket with double oil guide pipes according to claim 1 is characterized in that: In step 2, in S4, the angle between the laser welding head and the stepped oil guide pipe is adjusted, wherein the laser beam and the center line of the stepped oil guide pipe are parallel to each other.

4. The welding process for a differential pressure sensor socket with double oil guide pipes according to claim 1 is characterized in that: In step three S2, the laser is evenly irradiated on the weld by uniformly rotating the rotating base clamped by the differential pressure sensor tube holder, wherein the uniform rotation can be performed manually or by an external motor, wherein the rotation direction of the rotating base is a circular motion with the center line of the stepped oil guide pipe as the axis.

5. A differential pressure sensor socket used in the differential pressure sensor socket welding process with double oil guide pipes according to claims 1-4, 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 groups of lead holes (2), the top surface of the differential pressure sensor base (1) is provided with two groups of step holes (3), and the inside of the step holes (3) is vertically plugged with a step-type oil guide pipe (4).

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