Armored car seat ring welding control and high-precision forming process

Abstract

The invention provides an armored car seat ring welding control and high-precision forming process, which relates to the field of armored car manufacturing, and comprises the steps of a car body top cover assembly, an equipment seat ring, a seat ring welding auxiliary tool, seat ring machining, tool design and manufacturing, preparation before welding, a welding process and quality control. The equipment seat ring is located in the automobile body top cover assembly. The seat ring welding assistive device is located on the upper end face of the equipment seat ring. Advanced digital laser filler wire welding equipment is used for welding operation in the seat ring machining process; according to the tool design and manufacturing, a seat ring welding auxiliary tool is designed; the seat ring welding part is prepared to be cleaned before welding; in the welding process, a laser filler wire welding process is adopted for welding; the quality control comprises appearance detection, size detection and internal quality detection; the requirement for the performance of the equipment seat ring in the armored car combat environment is met, pollution to the environment in the welding process is reduced, and the problem that the bearing capacity and stability of the seat ring are easily affected when tasks are executed in the existing severe environment is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of armored vehicle manufacturing, and particularly to a welding control and high-precision forming process for the seat ring of an armored vehicle. Background Art

[0002] In the weapon system of an armored vehicle, the equipment seat ring is a core component, which needs to have high strength, high stability and high precision to withstand the huge impact force and vibration during weapon firing, and ensure the stable and accurate operation of the weapon in a complex combat environment. Welding, as the key process for connecting the various components of the seat ring and the seat ring with the vehicle body top cover, directly determines the overall performance of the seat ring. A high-quality welding process can ensure the structural integrity of the seat ring, avoid defects such as cracks and fractures, and provide a strong guarantee for the safety and reliability of the weapon system of the armored vehicle.

[0003] According to CN201510245139.7, the present invention relates to a technical solution for high-precision rapid prototyping, especially a method and device for high-precision rapid prototyping combining additive and subtractive manufacturing. The method is to first build the product blank layer by additive manufacturing, and then finely cut the contour of the blank layer to obtain high-precision external dimensions. The cycle work is completed for the construction and cutting of each layer of the product to achieve the high-precision rapid manufacturing of the product. The present invention includes a manufacturing method and a device for manufacturing products using this method.

[0004] However, when the traditional welding process is used to process large and complex structural parts such as the large equipment seat ring of an armored vehicle, a large amount of heat generated during the welding process will cause uneven heating of each part of the seat ring, resulting in large welding deformation, which is likely to affect the dimensional accuracy of the seat ring, such as the deviation of the inner diameter size and the offset of the equipment installation hole position, and will also cause difficulties in subsequent assembly. Since armored vehicles usually perform tasks in harsh combat environments, it is likely to affect the bearing capacity and stability of the seat ring, thus affecting the normal use of the weapon system. Summary of the Invention

[0005] In view of this, the present invention provides a welding control and high-precision forming process for the seat ring of an armored vehicle, which reduces the production cost. According to the actual production data, the production efficiency is increased by 20%, the scrap rate is reduced by 30%, it meets the requirements of the armored vehicle combat environment for the performance of the equipment seat ring, reduces the pollution of the environment during the welding process, and this welding process has good compatibility with other armored vehicle manufacturing technologies.

[0006] The present invention provides the purposes and effects of a welding control and high-precision forming process for an armored vehicle seat ring, specifically including: a body top cover assembly, an equipment seat ring, a body mounting surface, equipment mounting holes, a seat ring welding fixture, seat ring machining, tooling design and manufacturing, preparation before welding, the welding process, and quality control; the equipment seat ring is located inside the body top cover assembly, and the equipment seat ring is a high-strength alloy steel circular ring structure; the body mounting surface is fixedly connected to the outer end face of the equipment seat ring, and the body mounting surface is welded to the body top cover assembly; a total of 38 groups of equipment mounting holes are provided, and the 38 groups of equipment mounting holes are evenly arranged and opened on the equipment mounting surface; the seat ring welding fixture is located on the upper end face of the equipment seat ring, and the seat ring welding fixture is a high-strength and high-precision alloy steel circular ring structure; the seat ring machining uses advanced digital laser wire filling welding equipment and intelligent welding robots for welding operations, uses an automatic control heating furnace for tempering process, is equipped with high-precision CNC milling and grinding equipment for milling and grinding processing, is equipped with high-precision three-coordinate measuring instruments, ultrasonic flaw detectors, and ray flaw detectors for quality inspection, and is equipped with a seat ring welding fixture to ensure the accuracy of seat ring installation and hole position accuracy detection; the tooling design and manufacturing uses computer-aided design (CAD) technology to design the seat ring welding fixture; the preparation before welding thoroughly grinds and cleans the seat ring welding part, and the seat ring welding fixture is placed on the upper end face of the equipment seat ring; the welding process uses laser wire filling welding process for welding, and uses multiple-pass and segmented skip welding methods for welding operations; the quality control includes appearance inspection, dimensional inspection, and internal quality inspection.

[0007] Further, the seat ring machining includes: an equipment mounting surface; the equipment mounting surface is fixedly connected to the upper end face of the equipment seat ring respectively; a 5-mm machining allowance is reserved in the thickness direction of the equipment seat ring, the inner diameter of the equipment seat ring reaches 2176 mm, the outer diameter is 2287 mm, and 38 equipment mounting holes are machined simultaneously, and the hole position accuracy reaches 0.05 mm.

[0008] Further, the tooling design and manufacturing includes: auxiliary mounting surfaces and auxiliary mounting holes; a total of two groups of auxiliary mounting surfaces are provided, and the two groups of auxiliary mounting surfaces are fixedly connected to the upper and lower end faces of the seat ring welding fixture respectively; a total of 38 groups of auxiliary mounting holes are provided, the 38 groups of auxiliary mounting holes are respectively opened on the two groups of auxiliary mounting surfaces, and the 38 groups of auxiliary mounting holes are respectively bolted to the 38 groups of equipment mounting holes.

[0009] Further, the tooling design and manufacturing also includes: welding support rods and reinforcement connection blocks; a total of multiple groups of welding support rods are provided, and the multiple groups of welding support rods are fixedly connected to the inner end face of the seat ring welding fixture respectively, and the multiple groups of welding support rods respectively form a triangular strengthening support structure; a total of multiple groups of reinforcement connection blocks are provided, and the multiple groups of reinforcement connection blocks are fixedly connected to the upper and lower end faces of the multiple groups of welding support rods respectively.

[0010] Further, the preparations before welding include: grinding and cleaning the welding part of the equipment seat ring to remove oil stains, scale impurities, tightly connecting the equipment seat ring and the seat ring welding auxiliary tool with bolts, installing the equipment seat ring and the seat ring welding auxiliary tool on the welding workbench, debugging the laser filler wire welding equipment to ensure normal operation of the equipment, preheating the welding area, and controlling the preheating temperature at 150 - 200°C.

[0011] Further, the welding process includes: digital laser filler wire welding equipment welding parameters, laser power: for the equipment seat ring with a thickness of 20 mm (including 5 mm reserved surplus material), the welding laser power is set at 3000 - 3500 W, laser spot diameter: kept at 0.8 - 1.0 mm, welding speed: the starting welding speed is 8 mm / s, adjusted within the range of 8 - 10 mm / s according to the molten pool state and heat input situation, wire feeding speed: the initial wire feeding speed is set at 6 m / min, adjusted within the range of 6 - 8 m / min according to the weld filling situation, segmented skip welding: the length of each weld segment is set at 60 mm, the adjacent two welding intervals are 50 s, multiple - pass welding parameter adjustment: the thickness of each weld pass is controlled at 2 - 3 mm, and the width is controlled at 5 - 7 mm.

[0012] Further, the welding process also includes: after welding, putting the body top cover assembly, the equipment seat ring and the seat ring welding auxiliary tool into the automatic control heating furnace together, and performing heating, heat preservation and cooling operations according to a specific tempering process curve. The tempering parameters are as follows: the tempering temperature is set at 580°C, the heat preservation time is 2.5 h, and the cooling rate is controlled at 8°C / h. During the tempering process, nitrogen protection is adopted to prevent oxidation of the seat ring surface. Using the TRS - 36D350 / 46D350 high - precision numerical control milling and grinding equipment, performing fine milling and grinding on the surface of the equipment seat ring. The milling and grinding parameters are set as follows: the rotational speed of the milling cutter is 2200 r / min, the feed rate is 0.12 mm / r, and the cutting depth is 0.25 mm; the linear speed of the grinding wheel is 32 m / s, the feed rate is 0.08 mm / time, the grinding depth is 8 μm, cooling parameters: using compressed air for cooling, the compressed air pressure is 0.6 MPa, and the distance between the air outlet and the weld is kept at 12 mm.

[0013] Further, the quality control includes: after the equipment seat ring is welded, visually inspecting the appearance of the equipment seat ring by professional personnel to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, pores, slag inclusions, etc. Using non - destructive testing techniques such as penetrant testing, and the penetrant testing is carried out in accordance with the ASTME165 standard to ensure the accuracy of the testing.

[0014] Furthermore, the quality control also includes: when the equipment seat ring is subjected to dimensional inspection, a high-precision coordinate measuring instrument is used to measure various dimensions of the seat ring. The surface flatness of the equipment seat ring reaches ±0.05 mm, the flatness of the installation surface of the equipment seat ring reaches 0.04 mm, and the accuracy of the equipment installation holes reaches 0.05 mm.

[0015] Furthermore, the quality control also includes: non-destructive testing methods such as ultrasonic flaw detection and radiographic flaw detection are carried out on the equipment seat ring. Ultrasonic flaw detection is carried out according to the JB / T10061 standard, and radiographic flaw detection is carried out according to the GB / T3323 standard.

[0016] Beneficial effects

[0017] Through the coupling and coordination of multiple processes, the present invention starts from multiple aspects such as the seat ring welding fixture, setting strengthening supports and rigid fixation, reasonable welding parameter settings, segmented skip welding, staggered welding directions, tempering treatment and stress elimination, and adopting dynamic pre-deformation technology, etc., effectively suppressing welding deformation, ensuring the dimensional accuracy of the seat ring, especially ensuring the inner diameter size of the seat ring and the accuracy of the equipment installation hole positions, facilitating subsequent assembly, and improving the bearing capacity and stability of the seat ring; through actual testing, after adopting the process of the present invention, the welding deformation amount of the seat ring is reduced by more than 30% compared with the traditional process.

[0018] In addition, through the secondary surface milling process, the surface flatness of the equipment seat ring reaches the ultra-high precision requirement of ±0.05 mm, the flatness of the installation surface of the equipment seat ring reaches 0.04 mm, meeting the stringent requirements of the armored vehicle weapon system for the high precision of the equipment seat ring, improving the overall performance of the weapon system. By precise machining, strict control of the welding process, and detection and correction during the milling process, it is ensured that the accuracy of 38 equipment installation hole positions on the equipment seat ring reaches 0.05 mm, meeting the high-precision requirements of equipment installation.

[0019] In addition, advanced processes and equipment, as well as a scientific quality control system, improve production efficiency, enhance product quality, reduce the scrap rate, and lower production costs; according to actual production data, the production efficiency is increased by 20%, the scrap rate is reduced by 30%, meeting the requirements of the armored vehicle combat environment for the performance of the equipment seat ring. At the same time, attention is paid to environmental protection, reducing the pollution of the welding process to the environment, conforming to the development trend of green manufacturing, greatly shortening the R & D and production cycle of new products. This welding process has good compatibility with other armored vehicle manufacturing technologies, ensuring the normal use of the armored vehicle weapon system. Brief description of the drawings

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0021] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0022] In the accompanying drawings:

[0023] Figure 1 It is a schematic structural diagram of the connection among the body top cover assembly, the equipped seat ring, and the seat ring welding fixture in an embodiment of the present invention.

[0024] Figure 2 It is a schematic structural diagram of the disassembly of the body top cover assembly, the equipped seat ring, and the seat ring welding fixture in an embodiment of the present invention.

[0025] Figure 3 It is a schematic structural diagram of the connection between the body top cover assembly and the equipped seat ring in an embodiment of the present invention.

[0026] Figure 4 It is a schematic structural diagram of the connection between the equipped seat ring and the seat ring welding fixture in an embodiment of the present invention.

[0027] Figure 5 It is a schematic bottom view structural diagram of the seat ring welding fixture in an embodiment of the present invention.

[0028] Figure 6 It is a schematic top view structural diagram of the equipped seat ring in an embodiment of the present invention.

[0029] List of reference numerals

[0030] 1. Body top cover assembly; 2. Equipped seat ring; 201. Equipment installation surface; 202. Body installation surface; 203. Equipment installation hole; 3. Seat ring welding fixture; 301. Auxiliary installation surface; 302. Auxiliary installation hole; 4. Welding support rod; 5. Reinforcement connection block. Detailed implementation manners

[0031] Embodiment 1: Please refer to Figures 1 to 6 as shown in

[0032] The present invention provides an armored vehicle seat ring welding control and high-precision forming process, including: body top cover assembly 1, equipment seat ring 2, body mounting surface 202, equipment mounting holes 203, seat ring welding fixture 3, seat ring machining, tooling design and manufacturing, preparation before welding, and welding process; the equipment seat ring 2 is located inside the body top cover assembly 1, and the equipment seat ring 2 is a high-strength alloy steel circular ring structure; the body mounting surface 202 is fixedly connected to the outer end face of the equipment seat ring 2, and the body mounting surface 202 is welded to the body top cover assembly 1; there are 38 groups of equipment mounting holes 203 in total, and the 38 groups of equipment mounting holes 203 are respectively evenly arranged and opened on the equipment mounting surface 201; the seat ring welding fixture 3 is located on the upper end face of the equipment seat ring 2, and the seat ring welding fixture 3 is a high-strength and high-precision alloy steel circular ring structure; for seat ring machining, advanced digital laser wire filling welding equipment and intelligent welding robots are used for welding operations, an automatic control heating furnace is used for tempering process, high-precision CNC milling and grinding equipment is equipped for milling and grinding processing, high-precision three-coordinate measuring instruments, ultrasonic flaw detectors, and ray flaw detectors are equipped for quality inspection, and the seat ring welding fixture 3 is equipped to ensure the accuracy of seat ring installation and hole position accuracy detection; for tooling design and manufacturing, computer-aided design (CAD) technology is used to design the seat ring welding fixture 3; before welding preparation, the seat ring welding part is thoroughly polished and cleaned, and the seat ring welding fixture 3 is placed on the upper end face of the equipment seat ring 2; during the welding process, laser wire filling welding process is used for welding, and multiple-pass and segmented skip welding methods are used for welding operations.

[0033] Among them, the seat ring machining includes: equipment mounting surface 201; the equipment mounting surface 201 is respectively fixedly connected to the upper end face of the equipment seat ring 2; a 5-mm machining allowance is reserved in the thickness direction of the equipment seat ring 2, the inner diameter of the equipment seat ring 2 is 2176 mm, the outer diameter is 2287 mm, and 38 equipment mounting holes 203 are machined simultaneously, and the hole position accuracy reaches 0.05 mm. During use, the equipment mounting holes 203 are opened on the equipment mounting surface 201 of the equipment seat ring 2, which facilitates the installation of the seat ring welding fixture 3 on the equipment seat ring 2, facilitates the subsequent welding operation of the equipment seat ring 2, and at the same time controls the thickness of the equipment seat ring 2 to ensure the machining quality of the equipment seat ring 2.

[0034] Among them, the fixture design and manufacturing include: an auxiliary installation surface 301 and auxiliary installation holes 302; there are two groups of the auxiliary installation surfaces 301, and the two groups of auxiliary installation surfaces 301 are respectively fixedly connected to the upper and lower end faces of the seat ring welding fixture 3; there are 38 groups of the auxiliary installation holes 302, and the 38 groups of auxiliary installation holes 302 are respectively opened on the two groups of auxiliary installation surfaces 301. The 38 groups of auxiliary installation holes 302 are respectively connected to the 38 groups of equipment installation holes 203 by bolts. During use, the movement of the seat ring welding fixture 3 drives the movement of the auxiliary installation surface 301 and the auxiliary installation holes 302. The movement of the auxiliary installation holes 302 aligns with the equipment installation holes 203, and bolts are used to install inside the auxiliary installation holes 302 and the equipment installation holes 203, connecting the seat ring welding fixture 3 and the equipment seat ring 2 together for rigid fixation, effectively preventing welding deformation.

[0035] Among them, the fixture design and manufacturing also include: welding support rods 4 and reinforcement connection blocks 5; there are multiple groups of the welding support rods 4, and the multiple groups of welding support rods 4 are respectively fixedly connected to the inner end faces of the seat ring welding fixture 3. The multiple groups of welding support rods 4 respectively form a triangular reinforcement support structure; there are multiple groups of the reinforcement connection blocks 5, and the multiple groups of reinforcement connection blocks 5 are respectively fixedly connected to the upper and lower end faces of the multiple groups of welding support rods 4. During use, after the welding support rods 4 and the reinforcement connection blocks 5 are fixed to the inner end faces of the seat ring welding fixture 3, the constraint ability of the fixture on the seat ring is effectively improved; the surface of the fixture is subjected to special wear-resistant treatment to extend the service life of the fixture.

[0036] Among them, the preparations before welding include: grinding and cleaning the welding parts of the equipment seat ring 2 to remove oil stains, oxide scale impurities. The equipment seat ring 2 and the seat ring welding fixture 3 are tightly connected by bolts. The equipment seat ring 2 and the seat ring welding fixture 3 are installed on the welding workbench, and the laser filler wire welding equipment is debugged to ensure normal operation of the equipment. The welding area is preheated, and the preheating temperature is controlled at 150 - 200 °C. During use, the cleaning of the welding parts of the equipment seat ring 2 ensures the welding quality, and the preheating treatment of the welding area is adjusted to reduce the temperature gradient during welding and reduce the risk of deformation.

[0037] Among them, the welding process includes: the welding parameters of the digital laser wire filling welding equipment. Laser power: For the equipment seat ring 2 with a thickness of 20 mm (including 5 mm reserved surplus material), the welding laser power is set to 3000 - 3500 W. Laser spot diameter: kept at 0.8 - 1.0 mm. Welding speed: The starting welding speed is 8 mm / s, and it is adjusted within the range of 8 - 10 mm / s according to the molten pool state and heat input. Wire feeding speed: The initial wire feeding speed is set to 6 m / min, and it is adjusted within the range of 6 - 8 m / min according to the weld filling situation. Sectional skip welding: The length of each weld section is set to 60 mm, and the interval time between adjacent two weldings is 50 s. Multiple-pass welding parameter adjustment: The thickness of each weld is controlled within 2 - 3 mm, and the width is controlled within 5 - 7 mm. During use, a suitable welding speed during the welding of the equipment seat ring 2 helps to control the heat input, reduce deformation, equipped with a high-precision wire feeding mechanism to ensure the stability of wire feeding. Reasonable sectional skip welding and cooling time settings can effectively disperse the welding heat input, prevent deformation caused by heat concentration, and ensure the welding quality of the equipment seat ring 2.

[0038] Among them, the welding process also includes: after welding, the body top cover assembly 1, the equipment seat ring 2, and the seat ring welding auxiliary tool 3 are put into the automatic control heating furnace together, and heating, heat preservation, and cooling operations are carried out according to a specific tempering process curve. The tempering parameters are as follows: The tempering temperature is set to 580 °C, the heat preservation time is 2.5 h, and the cooling rate is controlled at 8 °C / h; during the tempering process, nitrogen protection is adopted to prevent the surface of the seat ring from oxidation. A TRS-36D350 / 46D350 high-precision numerical control milling and grinding equipment is used to carry out fine milling and grinding processing on the surface of the equipment seat ring 2. The milling and grinding parameter settings are as follows: The rotational speed of the milling cutter is 2200 r / min, the feed rate is 0.12 mm / r, and the cutting depth is 0.25 mm; the linear speed of the grinding wheel is 32 m / s, the feed rate is 0.08 mm / time, and the grinding depth is 8 μm. Cooling parameter: Compressed air cooling is adopted, the compressed air pressure is 0.6 MPa, and the distance between the air outlet and the weld is kept at 12 mm. During use, accurately control the tempering temperature, heat preservation time, and cooling rate to fully eliminate the welding residual stress, further reduce the deformation risk, and improve the comprehensive performance of the seat ring. During the tempering process, nitrogen protection is adopted to prevent the surface of the seat ring from oxidation; after the tempering treatment, the residual stress of the seat ring is reduced by 40%, effectively improving the comprehensive performance of the seat ring. Accurately control the rotational speed, feed rate, and cutting depth of the milling cutter, as well as the linear speed, feed rate, and grinding depth of the grinding wheel, focus on processing the seat ring installation surface to ensure that its flatness reaches the design requirement of 0.04 mm, and ensure that the cooling effect is uniform and stable to avoid deformation caused by uneven cooling.

[0039] Specific usage method and function of the first embodiment: In the process of using the present invention, equipment mounting holes 203 are opened on the equipment mounting surface 201 of the equipment seat ring 2, which facilitates the installation of the seat ring welding fixture 3 on the equipment seat ring 2, facilitating subsequent welding operations on the equipment seat ring 2. At the same time, the thickness of the equipment seat ring 2 is controlled to ensure the processing quality of the equipment seat ring 2. The movement of the seat ring welding fixture 3 drives the movement of the auxiliary mounting surface 301 and the auxiliary mounting hole 302. The movement of the auxiliary mounting hole 302 aligns with the equipment mounting hole 203, and bolts are used to install inside the auxiliary mounting hole 302 and the equipment mounting hole 203, connecting the seat ring welding fixture 3 and the equipment seat ring 2 together for rigid fixation, effectively preventing welding deformation. After the welding support rod 4 and the reinforcement connection block 5 are fixed on the inner end face of the seat ring welding fixture 3, the constraint ability of the tooling on the seat ring is effectively improved; the surface of the tooling is subjected to special wear-resistant treatment to extend the service life of the tooling. The welding part of the equipment seat ring 2 is cleaned to ensure welding quality, and the preheating treatment of the welding area is adjusted to reduce the temperature gradient during the welding process and reduce the deformation risk. A suitable welding speed during the welding of the equipment seat ring 2 helps to control the heat input, reduce deformation, and is equipped with a high-precision wire feeding mechanism to ensure the stability of wire feeding. The reasonable setting of segmented skip welding and cooling time can effectively disperse the welding heat input and prevent deformation caused by heat concentration, ensuring the welding quality of the equipment seat ring 2. The tempering temperature, holding time, and cooling rate are precisely controlled to fully eliminate the welding residual stress, further reducing the deformation risk and improving the comprehensive performance of the seat ring. During the tempering process, nitrogen protection is adopted to prevent the oxidation of the seat ring surface. After the tempering treatment, the residual stress of the seat ring is reduced by 40%, effectively improving the comprehensive performance of the seat ring. The rotational speed, feed rate, and cutting depth of the milling cutter, as well as the linear speed, feed rate, and grinding depth of the grinding wheel, are precisely controlled, and the seat ring mounting surface is key processed to ensure that its flatness meets the design requirement of 0.04 mm, ensuring uniform and stable cooling effect, avoiding deformation caused by uneven cooling, and ensuring the welding quality of the equipment seat ring 2.

[0040] Embodiment Two:

[0041] Based on the first embodiment, please refer to Figure 6 as shown:

[0042] The present invention provides a welding control and high-precision forming process for an armored vehicle seat ring, which also includes quality control. The quality control includes appearance inspection, dimensional inspection, and internal quality inspection. The quality control includes: after the welding of the equipment seat ring 2 is completed, the appearance of the equipment seat ring 2 is inspected. Professional personnel conduct visual inspection to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, pores, and slag inclusions. Non-destructive testing techniques such as penetrant testing are used. The penetrant testing is carried out in accordance with the ASTM E165 standard to ensure the accuracy of the testing. During the use process, it is ensured that the surface quality of the equipment seat ring 2 meets the high-standard requirements.

[0043] Among them, quality control also includes: when the equipment seat ring 2 is subjected to dimensional inspection, a high-precision coordinate measuring instrument is used to measure various dimensions of the seat ring. The surface flatness of the equipment seat ring 2 reaches ±0.05 mm, the flatness of the installation surface of the equipment seat ring 2 reaches 0.04 mm, and the accuracy of the equipment installation hole 203 reaches 0.05 mm. During use, the coordinate measuring instrument is regularly calibrated according to the ISO 10360 standard to ensure the measurement accuracy.

[0044] Among them, quality control also includes: non-destructive testing methods such as ultrasonic flaw detection and radiographic flaw detection are carried out on the equipment seat ring 2. Ultrasonic flaw detection is carried out according to the JB / T10061 standard, and radiographic flaw detection is carried out according to the GB / T3323 standard. During use, the internal quality of the equipment seat ring 2 is comprehensively detected to ensure that there are no defects inside the equipment seat ring 2, and to ensure the integrity and reliability of its internal structure.

[0045] Specific usage mode and function of the second embodiment: In the present invention, it is ensured that the surface quality of the equipment seat ring 2 meets high-standard requirements. The coordinate measuring instrument is regularly calibrated according to the ISO 10360 standard to ensure the measurement accuracy. The internal quality of the equipment seat ring 2 is comprehensively detected to ensure that there are no defects inside the equipment seat ring 2, and to ensure the integrity and reliability of its internal structure, so as to achieve high-quality detection of the equipment seat ring 2.

Claims

1. An armored vehicle seat ring welding control and high-precision forming process, characterized in that, Including: Body roof assembly, equipment seat ring, body mounting surface, equipment mounting holes, seat ring welding fixture, seat ring machining, tooling design and manufacturing, preparation before welding, welding process and quality control; the equipment seat ring is located inside the body roof assembly, and the equipment seat ring is a high-strength alloy steel circular structure; the body mounting surface is fixedly connected to the outer end surface of the equipment seat ring, and the body mounting surface is welded to the body roof assembly; there are 38 groups of equipment mounting holes in total, and the 38 groups of equipment mounting holes are evenly arranged and opened on the equipment mounting surface; the seat ring welding fixture is located on the upper end surface of the equipment seat ring, and the seat ring welding fixture is a high-strength and high-precision alloy steel circular structure; the seat ring machining uses advanced digital laser wire filling welding equipment and intelligent welding robots for welding operations, uses an automatic control heating furnace for tempering process, is equipped with high-precision numerical control milling and grinding equipment for milling and grinding processing, is equipped with high-precision three-coordinate measuring instruments, ultrasonic flaw detectors, and ray flaw detectors for quality inspection, and is equipped with a seat ring welding fixture to ensure the accuracy of seat ring installation and hole position accuracy detection; the tooling design and manufacturing uses computer-aided design (CAD) technology to design the seat ring welding fixture; the preparation before welding thoroughly grinds and cleans the seat ring welding part, and places the seat ring welding fixture on the upper end surface of the equipment seat ring; the welding process uses laser wire filling welding process for welding, and uses multiple-pass and segmented skip welding methods for welding operations; the quality control includes appearance inspection, dimensional inspection, and internal quality inspection.

2. The welding control and high-precision forming process of an armored vehicle seat ring according to claim 1, characterized in that: The seat ring machining includes: equipment mounting surface; the equipment mounting surface is fixedly connected to the upper end surface of the equipment seat ring respectively; a 5-mm machining allowance is reserved in the thickness direction of the equipment seat ring, the inner diameter of the equipment seat ring is up to 2176 mm, the outer diameter is 2287 mm, and 38 equipment mounting holes are machined simultaneously, and the hole position accuracy reaches 0.05 mm.

3. The welding control and high-precision forming process of an armored vehicle seat ring according to claim 1, characterized in that: The tooling design and manufacturing includes: auxiliary mounting surface and auxiliary mounting holes; there are two groups of auxiliary mounting surfaces in total, and the two groups of auxiliary mounting surfaces are fixedly connected to the upper and lower end surfaces of the seat ring welding fixture respectively; there are 38 groups of auxiliary mounting holes in total, the 38 groups of auxiliary mounting holes are respectively opened on the two groups of auxiliary mounting surfaces, and the 38 groups of auxiliary mounting holes are respectively bolt-connected to the 38 groups of equipment mounting holes.

4. The welding control and high-precision forming process of an armored vehicle seat ring according to claim 1, characterized in that: The tooling design and manufacturing also includes: welding support rods and reinforcement connection blocks; there are multiple groups of welding support rods in total, and the multiple groups of welding support rods are fixedly connected to the inner end surface of the seat ring welding fixture respectively, and the multiple groups of welding support rods respectively form a triangular reinforcement support structure; there are multiple groups of reinforcement connection blocks in total, and the multiple groups of reinforcement connection blocks are fixedly connected to the upper and lower end surfaces of the multiple groups of welding support rods respectively.

5. The welding control and high-precision forming process of an armored vehicle seat ring according to claim 1, characterized in that: The preparation before welding includes: grinding and cleaning the seat ring welding part of the equipment seat ring, removing oil stains, oxide scale impurities, tightly connecting the equipment seat ring and the seat ring welding fixture by bolts, installing the equipment seat ring and the seat ring welding fixture on the welding workbench, debugging the laser wire filling welding equipment to ensure normal operation of the equipment, preheating the welding area, and controlling the preheating temperature at 150-200 °C.

6. The welding control and high-precision forming process of an armored vehicle seat ring according to claim 1, characterized in that: The welding process includes: digital laser wire filling welding equipment welding parameters. Laser power: For the equipment seat ring with a thickness of 20 mm (including 5 mm reserved surplus material), the welding laser power is set at 3000 - 3500 W. Laser spot diameter: Kept at 0.8 - 1.0 mm. Welding speed: The starting welding speed is 8 mm / s, and it is adjusted within the range of 8 - 10 mm / s according to the molten pool state and heat input. Wire feeding speed: The initial wire feeding speed is set at 6 m / min, and it is adjusted within the range of 6 - 8 m / min according to the weld filling situation. Sectional skip welding: The length of each weld section is set at 60 mm, and the welding interval time between adjacent two sections is 50 s. Multiple-pass welding parameter adjustment: The thickness of each weld pass is controlled within 2 - 3 mm, and the width is controlled within 5 - 7 mm.

7. The armored vehicle seat ring welding control and high-precision forming process according to claim 6, characterized in that: The welding process also includes: After welding is completed, the body top cover assembly, the equipment seat ring, and the seat ring welding auxiliary tool are put into the automatic control heating furnace together, and heating, heat preservation, and cooling operations are carried out according to a specific tempering process curve. The tempering parameters are as follows: The tempering temperature is set at 580 °C, the heat preservation time is 2.5 h, and the cooling rate is controlled at 8 °C / h; During the tempering process, nitrogen protection is adopted to prevent the surface oxidation of the seat ring. A TRS-36D350 / 46D350 high-precision numerical control milling and grinding equipment is used to carry out fine milling and grinding processing on the surface of the equipment seat ring. The milling and grinding parameter settings are as follows: The rotational speed of the milling cutter is 2200 r / min, the feed rate is 0.12 mm / r, and the cutting depth is 0.25 mm; The linear speed of the grinding wheel is 32 m / s, the feed rate is 0.08 mm / time, and the grinding depth is 8 μm. Cooling parameters: Compressed air cooling is adopted, the compressed air pressure is 0.6 MPa, and the distance between the air outlet and the weld is kept at 12 mm.

8. The welding control and high-precision forming process of an armored vehicle seat ring according to claim 1, characterized in that: The quality control includes: After the equipment seat ring is welded, the appearance of the equipment seat ring is inspected. Visual inspection is carried out by professional personnel to ensure that the weld surface is smooth and uniform, without obvious defects such as cracks, pores, and slag inclusions. Non-destructive testing techniques such as penetrant testing are adopted. The penetrant testing is carried out in accordance with the ASTM E165 standard to ensure the accuracy of the testing.

9. The armored vehicle seat ring welding control and high-precision forming process according to claim 8, characterized in that: The quality control also includes: When the dimensions of the equipment seat ring are measured, a high-precision coordinate measuring instrument is used to measure various dimensions of the seat ring. The surface flatness of the equipment seat ring reaches ±0.05 mm, the flatness of the installation surface of the equipment seat ring reaches 0.04 mm, and the accuracy of the equipment installation hole reaches 0.05 mm.

10. The armored vehicle seat ring welding control and high-precision forming process according to claim 9, characterized in that: The quality control also includes: Non-destructive testing methods such as ultrasonic flaw detection and radiographic flaw detection are carried out on the equipment seat ring. The ultrasonic flaw detection is carried out in accordance with the JB / T 10061 standard, and the radiographic flaw detection is carried out in accordance with the GB / T 3323 standard.

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