Clamping device for housing parts and method for processing housing parts

Abstract

The application discloses a clamping device for shell parts and a shell part machining method. The shell comprises an end cover and a side plate. The end cover seals the upper end of the side plate to form a cavity with an opening facing downward. The end cover is provided with first and second end faces connected in a stepped manner from bottom to top. The first end face is provided with an assembly hole. The bottom of the side plate is horizontally provided with a plurality of bosses with through holes. The side plate is provided with first and second arc-shaped surfaces at opposite ends. The clamping device for shell parts comprises a first clamp. The first clamp comprises a first top plate, at least two first floating supports, a profiled block, a plurality of pressing mechanisms mounted on the first top plate, and a plurality of positioning columns. The profiled block is matched with the first arc-shaped surface. Each corresponding pressing mechanism and positioning column is located on the upper and lower sides of the boss and clamps the boss together. Each first floating support is used for supporting the shell. The shell part machining method adopts the clamping device described above. In the machining process, the shell is not easy to deform, and the qualified rate of finished products is high.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts processing technology, specifically relating to a clamping device for a housing part and a method for processing housing parts. Background Technology

[0002] Currently, the thinnest part of the small shell parts in some new energy vehicles can be 3mm thick. Such shell structures are thin, lack rigidity, and are easily deformed, which seriously affects their assembly, mechanical and sealing performance. Moreover, the clamping table for CNC machining is not large enough, and the clamping is unreliable, affecting the processing efficiency and quality.

[0003] Therefore, a new technology is needed to solve the problems of easy deformation of shell parts during machining and low finished product qualification rate in existing technologies. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, the present invention provides a clamping device for shell parts and a method for processing shell parts, which has the advantages of preventing deformation of the shell during the machining of small, thin-walled shell parts and achieving a high pass rate for the finished products after processing.

[0005] The present invention adopts the following technical solution:

[0006] A clamping device for a housing component, the housing comprising an end cap and a side plate, the side plate being approximately annular, the end cap sealing the upper opening of the side plate and forming a downward-facing cavity, the upper end of the end cap having a first end face with an assembly hole for mounting an exhaust pipe; the bottom of the side plate having a plurality of protrusions horizontally protruding, each protrusion having a through hole parallel to the axis of the assembly hole; the side plate having a first arcuate surface at one end away from the assembly hole and a second arcuate surface at one end near the assembly hole; the housing also having a stepped second end face fixedly connected to the first end face, the first end face being located above the second end face;

[0007] The clamping device includes a first clamp, which includes a first top plate and a plurality of pressing mechanisms corresponding to the protrusions mounted on the first top plate, at least two first floating supports, a profile block, and positioning posts corresponding to the pressing mechanisms.

[0008] The side of the molding block closest to the shell is adapted to the first arc-shaped surface; the upper end of the positioning post abuts against the lower end face of a boss, and each of the clamping mechanisms abuts against the upper end face of the boss. Each positioning post and the corresponding clamping mechanism together clamp a boss; the first end face protrudes horizontally from the edge of the side plate to form a suspended part, and each of the first floating supports is spaced apart and used to support the suspended part.

[0009] As a further improvement to the technical solution of the present invention, the first clamp also includes a driving mechanism, a first base plate and a plurality of columns. The first base plate is located below the first top plate. The upper end of each column is detachably fixedly connected to the first top plate and the lower end is detachably fixedly connected to the first base plate. The driving mechanism is installed between the first top plate and the first base plate and is used to drive the pressing mechanism to press the boss or separate from the boss.

[0010] As a further improvement to the technical solution of the present invention, the clamping device further includes a second clamp, which includes a second top plate, a pressing head, a first pressing rod, a second bottom plate, and a plurality of second columns, a plurality of positioning support columns, a second floating support, a pre-positioning block, and a plurality of positioning pin seats mounted on the second bottom plate. The punching cylinder is mounted on the second bottom plate.

[0011] Each of the positioning pin seats is provided with a positioning pin, and each positioning pin corresponds one-to-one with each of the through holes; each of the positioning support columns is used to support the side plate; the upper end of the second floating support can extend into the cavity and abut against the end cap, and the first end face is located above the second floating support; the side of the prepositioning block near the housing matches the second arc-shaped surface; the upper end of each of the second columns is detachably fixedly connected to the second top plate, and the second top plate is used to install the pressing head and the first pressure rod; the bottom of the first pressure rod is provided with a spherical protrusion that can be partially embedded in the exhaust pipe, and the diameter of the spherical protrusion is smaller than the inner diameter of the exhaust pipe; the position of the connection node between the pressing head and the first end face and the second end face corresponds to the position of the connection node between the pressing head and the first end face and the second end face.

[0012] As a further improvement to the technical solution of the present invention, the second clamp is provided with a second driving mechanism, and the output end of the second driving mechanism is provided with a retractable first output shaft. The bottom of the first output shaft is fixedly connected to the pressing head. When the first output shaft is extended, the pressing head abuts against the end cover.

[0013] As a further improvement to the technical solution of the present invention, the clamping device further includes a third clamp, which includes a third driving mechanism, a third top plate, a plug, a plurality of second pressure rods, a mounting plate, a third bottom plate, and a plurality of third columns and at least two limiting columns mounted on the third bottom plate. The qualified product automatic punching cylinder is mounted on the third bottom plate. The third bottom plate is used to seal the lower opening of the side plate to seal the cavity, and the plug is used to seal the upper opening of the exhaust pipe.

[0014] The mounting plate is located between the third top plate and the third bottom plate. The third driving mechanism is mounted on the third top plate and is used to drive the mounting plate to move up and down in the vertical direction. The upper ends of each of the second pressure rods are fixed below the mounting plate, and the upper ends of each of the limiting posts are located below the mounting plate.

[0015] A method for processing a housing part, employing the clamping device for the housing part as described above, includes the following steps:

[0016] S1. Machining the first end face: The housing to be machined is fixed on the machining center using the first fixture, with the first end face facing upwards. The first end face is milled using a PCDφ80 milling cutter head following a straight path. When milling the first end face, the machining allowance of the first end face is 0.5mm, the machining feed is ≥0.2mm / r, and the machining speed is ≥7000r / min.

[0017] S2. Rough and finish drilling and reaming of the exhaust pipe assembly hole: The assembly hole is machined using a PCD drill and reamer that combines roughing and finishing. The machining allowance for the assembly hole is designed to be 0.4mm on each side. The opening of the assembly hole is chamfered to C0.5. The size of the assembly hole is machined to φ13 (-0.03 / -0.05), wherein the outer diameter of the exhaust pipe is φ13 (+0.05 / 0).

[0018] S3. Cleaning: Clean the inner and outer surfaces of the housing;

[0019] S4. Press-fit exhaust pipe + laser marking: A combined press is used, and the combined press is equipped with a second fixture and a laser marking device;

[0020] S41. Fix the housing onto the second clamp, with the first end face facing upwards, and the second floating support located below the end cap and directly below the assembly hole;

[0021] S42. After fixing the housing onto the second fixture, drive the clamping head to press down and clamp the workpiece;

[0022] S43. Apply glue to the mating section between the exhaust pipe and the mounting hole;

[0023] S44. Attach the exhaust pipe to the first pressure bar of the second clamp;

[0024] S45. Press the device start button to drive the first pressure rod to press down the exhaust pipe to press the exhaust pipe into the assembly hole. At the same time, record and display the pressing force.

[0025] S46. Immediately after pressing is completed, use laser to mark the corresponding identification;

[0026] S5. Sealing test: The housing is fixed with a third clamp and a dry test machine is used to test whether there is leakage in the housing. During the test, the dry test machine is inflated to 150KPa, the inflation time is 10 seconds, the stabilization time is 8 seconds, the detection time is 5 seconds, and the leakage amount is ≤0.9ml / min;

[0027] When the sealing is qualified, a qualified mark is applied, and the machine tool controls the third fixture to automatically punch the mark at the designated position using a cylinder. The allowable punching mark size is: maximum width φ1mm and maximum depth 0.5mm.

[0028] If the sealing performance is substandard, mark it with a red symbol and scrap it.

[0029] S6. Comprehensive inspection and packaging: Manually inspect the product for appearance defects, remove unqualified parts, and package qualified shells.

[0030] As a further improvement to the technical solution of the present invention, in step S1, the first end face is a plane with a diameter of φ78, a roughness of Ra1.6, a contour of 0.2, and a wall thickness of 3±0.2.

[0031] As a further improvement to the technical solution of the present invention, in step S3, a through-type high-pressure water cleaner is used to clean the surface of the shell. The through-type high-pressure water cleaner is provided with a first tank, a second tank, a third tank, a fourth tank, and a fifth tank connected in sequence. The first tank is a high-pressure water cleaning tank, in which tap water is used for cleaning; the second tank is a medium-pressure water cleaning tank, in which a cleaning agent is used for cleaning; the third tank is a spray cleaning tank, in which a cleaning agent is used for cleaning; the fourth tank is an air blowing tank; and the fifth tank is a drying tank, used to dry the residual moisture on the surface of the shell.

[0032] As a further improvement to the technical solution of the present invention, in step S4, an automatic glue applicator is used when applying the glue.

[0033] As a further improvement to the technical solution of the present invention, in step S5, before conducting a leakage test on the housing parts, the workbench surface and the fixture sealing surface are cleaned to ensure that there are no slag or debris on the workbench surface and the fixture sealing surface. Then, it is confirmed whether the dry testing machine is normal. If the OK / NG test is met, the dry testing machine can be started to conduct a leakage test; otherwise, the machine tool needs to be adjusted.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] The corresponding clamping mechanism and positioning pins form three point-to-point clamping points, ensuring the contour accuracy of the machined surface and the position accuracy of the machined holes. Each first floating support is a pneumatic floating support. A portion of the first end face on the end cap protrudes from the edge of the side plate, forming a suspended part. The suspended part occupies about 1 / 3 of the first end face. Since 1 / 3 of the first end face is in a suspended state, each first floating support is used to support the suspended part, preventing deformation of the suspended part due to cutting forces. Due to interference from the part structure, the first floating support cannot be set in the middle of the suspended part. Two or more first floating supports can be set and evenly distributed to provide uniform support for the suspended part, avoiding deformation of the shell during processing and preventing deformation of the workpiece under cutting forces. This makes it less likely for the shell to deform during the machining of small, thin-walled shell parts, and the finished product qualification rate is high. Attached Figure Description

[0036] The technology of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0037] Figure 1 This is a schematic diagram of the structure when the housing parts are placed on the first fixture;

[0038] Figure 2 This is a schematic diagram of the second clamp structure;

[0039] Figure 3 yes Figure 2 A schematic diagram of the structure when the housing parts are placed on the second fixture;

[0040] Figure 4 This is a schematic diagram of the structure when the housing parts are placed on the third fixture;

[0041] Figure 5 It is an isometric drawing of the overall structure of the housing parts;

[0042] Figure 6 This is a bottom view of the overall structure of the shell parts.

[0043] Figure label:

[0044] 1-Housing; 11-End cap; 111-First end face; 1111-Suspended portion; 112-Second end face; 113-Assembly hole; 12-Side plate; 121-First arc-shaped surface; 13-Boss; 131-Through hole; 14-Exhaust pipe; 15-Cavity;

[0045] 2-First clamp; 21-First top plate; 22-First bottom plate; 23-First column; 24-Clamping mechanism; 25-Positioning column; 26-Shaping block; 27-First floating support; 28-First drive mechanism;

[0046] 3-Second clamp; 31-Second top plate; 32-Second bottom plate; 33-Second column; 34-Clamping head; 35-First pressure rod; 351-Spherical protrusion; 36-Positioning support column; 37-Second floating support; 38-Pre-positioning block; 39-Positioning pin seat; 310-First punching cylinder; 311-Second drive mechanism;

[0047] 4-Third clamp; 41-Third top plate; 42-Third bottom plate; 43-Third column; 44-Plug; 45-Second pressure rod; 46-Mounting plate; 47-Limiting column; 48-Second punching cylinder; 49-Third drive mechanism. Detailed Implementation

[0048] The following will provide a clear and complete description of the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of the present invention. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The same reference numerals used throughout the accompanying drawings indicate the same or similar parts.

[0049] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. Furthermore, the descriptions of "up," "down," "left," and "right" used in this invention are only relative to the relative positional relationships of the various components of the invention in the accompanying drawings.

[0050] Reference Figures 1 to 6 A clamping device for a housing part is disclosed, used to clamp and fix the housing part during processing and assembly. The housing part 1 can be die-cast from aluminum alloy. The housing 1 includes an end cap 11 and a side plate 12, which are integrally formed. The end cap 11 is stepped, and the side plate 12 is approximately annular. The end cap 11 seals the upper opening of the side plate 12 and forms a downward-facing cavity 15. The upper end of the end cap 11 is provided with a first end face 111, and the first end face 111 is provided with an assembly hole 113 for installing an exhaust pipe 14. (Refer to...) Figure 5 and 6The bottom of the side plate 12 is provided with a plurality of protrusions 13, which are horizontal protrusions of the side plate 12 and can be used to connect with other structures or equipment. Each of the protrusions 13 is provided with a through hole 131 parallel to the axis of the mounting hole 113; the side plate 12 is provided with a first arc-shaped surface 121 at one end away from the mounting hole 113 and a second arc-shaped surface at the other end near the mounting hole 113; the housing 1 is also provided with a second end face 112 that is fixedly connected to the first end face 111 in a stepped shape, and the first end face 111 is located above the second end face 112.

[0051] Reference Figure 1 The clamping device for the housing part includes a first clamp 2, which includes a first top plate 21 and a plurality of pressing mechanisms 24 corresponding to the bosses 13, at least two first floating supports 27, a profile block 26, and positioning posts 25 corresponding to the pressing mechanisms 24, all mounted on the first top plate 21. The profile block 26 is adapted to the first arc-shaped surface 121 on the side near the housing 1; the upper end of the positioning post 25 abuts against the lower end face of a boss 13, and each clamping mechanism 24 abuts against the upper end face of the boss 13. Each positioning post 25 and the corresponding clamping mechanism 24 jointly clamp a boss 13; a portion of the first end face 111 of the end cover 11 protrudes horizontally from the edge of the side plate 12 to form a suspended portion 1111. Each first floating support 27 is spaced apart and used to support the suspended portion 1111, so as to avoid the housing 1 from being deformed by force during processing and to prevent the workpiece from being deformed by cutting force. During the machining of small thin-walled housing 1 parts, it is not easy for the housing 1 to be deformed and the finished product qualification rate is high.

[0052] Specifically, refer to Figure 1The first fixture 2 further includes a driving mechanism, a first base plate 22, and several columns. The first base plate 22 is located below the first top plate 21. The upper end of each column is detachably fixedly connected to the first top plate 21, and the lower end is detachably fixedly connected to the first base plate 22. The driving mechanism is installed between the first top plate 21 and the first base plate 22 and is used to drive the clamping mechanism 24 to clamp the boss 13 or separate from the boss 13. The correspondingly arranged clamping mechanism 24 and positioning column 25 form three point-to-point clamping points, ensuring the contour of the machined surface and the position accuracy of the machined holes. Each of the first floating supports 27 is a pneumatic floating support. A portion of the first end face 111 on the end cap 11 protrudes from the edge of the side plate 12 to form a suspended portion 1111. The suspended portion 1111 occupies approximately 1 / 3 of the first end face 111. Since 1 / 3 of the first end face 111 is in a suspended state, each of the first floating supports 27 is used to support the suspended portion 1111, preventing the suspended portion 1111 from deforming due to cutting forces. Due to interference from the component structure, the first floating support 27 cannot be placed in the middle of the suspended portion. Two or more first floating supports 27 can be set to distribute them evenly to provide uniform support for the suspended portion 1111.

[0053] Specifically, refer to Figure 2 and 3 The clamping device for the shell parts in this solution also includes a second clamp 3. The second clamp 3 includes a second top plate 31, a clamping head 34, a first pressure rod 35, a second bottom plate 32, and a plurality of second columns 33, a plurality of positioning support columns 36, a second floating support 37, a pre-positioning block 38, and a plurality of positioning pin seats 39 mounted on the second bottom plate 32. The punching cylinder is mounted on the second bottom plate 32.

[0054] Reference Figure 2 and 3Each of the positioning pin seats 39 is provided with a positioning pin, and each positioning pin corresponds one-to-one with each of the through holes 131; each of the positioning support columns 36 is used to support the side plate 12; the upper end of the second floating support 37 can extend into the cavity 15 and abut against the end cover 11, and the first end face 111 is located above the second floating support 37; the two pre-positioning blocks 38 are respectively matched with the first arc surface 121 and the second arc surface on the side near the housing 1, which can realize quick positioning and clamping. After the housing 1 part is fixed on the second clamp 3, the driving clamping head 34 is pressed down to clamp the workpiece. The upper end of each of the second columns 33 is detachably fixed to the second top plate 31, which is used to install the pressing head 34 and the first pressure rod. The bottom of the first pressure rod 35 is provided with a spherical protrusion 351 that can be partially embedded in the exhaust pipe 14. The diameter of the spherical protrusion 351 is smaller than the inner diameter of the exhaust pipe 14. The pressing head 34 corresponds to the connection node position of the first end face 111 and the second end face 112. The spherical protrusion 351 is provided with a negative pressure air hole. The spherical protrusion 351 is inserted into the exhaust pipe and the exhaust pipe 14 is positioned by air negative suction, which can avoid scratching the outer surface of the exhaust pipe 14.

[0055] Reference Figure 2 and 3 Specifically, the second clamp 3 is provided with a second drive mechanism 311, and the output end of the second drive mechanism 311 is provided with a retractable first output shaft. The bottom of the first output shaft is fixedly connected to the clamping head 34. When the first output shaft is extended, the clamping head 34 abuts against the end cover 11.

[0056] Specifically, refer to Figure 4 The clamping device for the housing parts in this solution also includes a third clamp 4, which includes a third drive mechanism 49, a third top plate 41, a plug 44, several second pressure rods 45, a sealing plate, a mounting plate 46, a third bottom plate 42, and several third columns 43 and at least two limiting columns 47 mounted on the third bottom plate 42. The qualified product automatic punching cylinder is mounted on the third bottom plate. The third bottom plate is used to seal the lower opening of the side plate 12 to seal the cavity 15. The plug 44 is used to block the upper opening of the exhaust pipe 14. The sealing plate is fixed on the third bottom plate 42. The size of the sealing plate is larger than the size of the bottom opening of the housing 1 part. The sealing plate is used to seal the bottom opening of the housing 1 part.

[0057] Reference Figure 4The mounting plate 46 is located between the third top plate 41 and the third bottom plate 42. The third driving mechanism 49 is mounted on the third top plate 41 and is used to drive the mounting plate 46 to move vertically up and down. The upper ends of each of the second pressure rods 45 are fixed below the mounting plate 46, and the upper ends of each of the limiting posts 47 are located below the mounting plate 46. The third driving mechanism 49 is preferably a cylinder. The third clamp 4 is made of stainless steel and can be used in the early water testing stage, thereby reducing the need for a separate water testing clamp. The third clamp 4 uses a main cylinder to drive four spring clamping mechanisms for clamping, and the pressure rods are installed at the bottom of each spring clamping mechanism. The limiting posts 47 prevent the pressure head from excessively pressing down, which could lead to clamping deformation and affect the sealing test.

[0058] By using different fixtures according to different processing steps, the problems of deformation and poor sealing in the processing and assembly of small thin-walled shells can be solved, thereby improving production efficiency and product quality, preventing defective products from being released, and meeting the needs of mass production.

[0059] Reference Figure 1-6 A method for processing a housing part, employing the clamping device for the housing part as described above, for processing and assembling the housing part 1, includes the following steps:

[0060] S1. Machining the first end face 111: The housing 1 to be machined is fixed on the machining center using the first fixture 2, with the first end face 111 facing upwards. A φ80PCD end mill with 6 inserts is used to mill the first end face 111 along a straight path, avoiding detours and improving machining efficiency. Five inserts are standard inserts, and one insert is a finishing insert. When milling the first end face 111, the machining allowance is 0.5mm, the machining feed is ≥0.2mm / r, and the machining speed is ≥7000r / min. The first end face 111 is a φ78 plane with a surface roughness of Ra1.6, a profile roughness of 0.2, and a wall thickness of 3±0.2, ensuring that the surface roughness meets the standards.

[0061] S2. Rough and finish drilling and reaming of the assembly hole 113 of the exhaust pipe 14: The plastic tube connected to the exhaust pipe 14 of the housing 1 has an inner diameter of φ13. In order to ensure smooth press-fitting, and at the same time ensure that the tube pull-out force is ≥2KN and the sealing performance is maintained, the diameter of the assembly hole 113 of the exhaust pipe 14 and the outer diameter of the exhaust pipe 14 need to be an interference fit, and the interference amount should be between 0.03 and 0.1. When drilling and reaming the assembly hole 113, a PCD drill and reamer that combines roughing and finishing is used to reduce the tool change time, improve the processing efficiency, and at the same time ensure the accuracy of the hole diameter and the surface roughness. The assembly hole 113 is machined using a combined roughing and finishing PCD drill and reamer. The machining allowance for the assembly hole 113 is designed to be 0.4mm on each side. A C0.5 chamfer is machined at the opening of the assembly hole 113. The diameter of the assembly hole 113 and the outer diameter of the exhaust pipe 14 are controlled as follows: the size of the assembly hole 113 is φ13 (-0.03 / -0.05), and the outer diameter of the exhaust pipe is φ13 (+0.05 / 0). During the drilling and reaming of the assembly hole 113, the housing 1 to be machined is fixed on the machining center using the first fixture 2. The assembly hole 113 is a process-controlled dimension. The diameter of the assembly hole 113 and the outer diameter of the exhaust pipe 14 are controlled according to an H7 / P6 fit, which allows for smooth press-fitting while preventing workpiece leakage. The C0.5 chamfer acts as a guide during press-fitting, preventing misalignment between the pipe and the hole, thus ensuring the positional accuracy of the exhaust pipe 14 after press-fitting.

[0062] S3. Cleaning: A through-type high-pressure water cleaner is used to clean the aluminum shavings on the inner and outer surfaces of the parts in the housing 1, ensuring that the parts in the housing 1 are clean. The through-type high-pressure water cleaner has a first tank, a second tank, a third tank, a fourth tank, and a fifth tank connected in sequence. The first tank is a high-pressure water cleaning tank, in which tap water is used for cleaning; the second tank is a medium-pressure water cleaning tank, in which a cleaning agent is used for cleaning; the third tank is a spray cleaning tank, in which a cleaning agent is used for cleaning; the fourth tank is an air blowing tank; and the fifth tank is a drying tank, used to dry the residual moisture on the surface of the housing 1.

[0063] S4. Press-fit exhaust pipe 14 + laser marking: Since the exhaust pipe 14 is exposed to the air after installation, it is made of SUS304 stainless steel and plated with zinc and nickel, meeting the requirement of no red rust after 720 hours of neutral salt spray testing. The press-fit process uses a combined press, which is equipped with a second clamp 3 and a laser marking device.

[0064] S41. Fix the housing 1 to the second clamp 3, with the first end face 111 facing upwards. The exhaust pipe 14 is positioned on the first pressure rod of the clamp using negative air suction to avoid scratching the outer surface of the exhaust pipe 14 and to prevent rusting. The second floating support 37 in the second clamp 3 prevents the workpiece from sinking and deforming under pressure during the pressing process, ensuring the height of the housing 1 remains stable after the exhaust pipe 14 is pressed in. Since there is no suitable support point directly below the exhaust pipe 14, it is in a suspended state. To prevent the exhaust pipe 14 from deforming under downward pressure, the second floating support 37 is provided. The second floating support 37 is located below the end cap and directly below the assembly hole 113, preventing the housing 1 from collapsing during the downward pressing of the exhaust pipe 14.

[0065] S42. After fixing the housing 1 part onto the second clamp 3, drive the clamping head 34 to press down and clamp the workpiece.

[0066] S43. Before pressing the exhaust pipe 14 onto the housing 1, apply adhesive to the mating section between the exhaust pipe 14 and the mounting hole 113. Applying adhesive to the mating section of the exhaust pipe 14 enhances the sealing performance. An automatic adhesive applicator is used to ensure even application and appropriate dosage, preventing adhesive from overflowing from the hole after pressing.

[0067] S44. Install the exhaust pipe 14 onto the first pressure rod of the second clamp 3. The first pressure rod uses air negative suction to position the exhaust pipe 14 to avoid scratching the outer surface of the exhaust pipe 14.

[0068] S45. Press the device start button, press down the exhaust pipe 14, drive the second clamp 3 to press the exhaust pipe 14 into the assembly hole 113, and at the same time, the device records and displays the pressing force.

[0069] S46. Immediately after pressing, laser engrave a QR code, along with the workpiece production date, shift, production line, and serial number. Immediate engraving at this stage reduces the number of processes and associated equipment, and minimizes the need for personnel scheduling. The code is located on the side of the product, allowing for product traceability.

[0070] S47. Automatic punching of products with qualified pressing force can be used to confirm the completion of this production process, which facilitates the traceability of whether the process is completed and whether the product is qualified after the corresponding process is completed.

[0071] S5. Perform an airtightness test on casing 1:

[0072] S51. Before conducting a leakage test on the housing 1 part, the workbench surface and the fixture sealing surface shall be cleaned to ensure that there are no debris on the workbench surface and the fixture sealing surface.

[0073] S52. Confirm that the dry testing machine is functioning properly. If it is, the dry testing machine can be started to conduct a leak test. Otherwise, the machine tool needs to be adjusted.

[0074] S53. Sealing test: When performing a sealing test on the housing 1 part, the housing 1 is fixed by the third clamp 4. The air test method is adopted, and the dry test machine is used to test whether the housing 1 has leakage. During the test, the dry test machine is filled with air to 150KPa, the filling time is 10 seconds, the stabilization time is 8 seconds, the detection time is 5 seconds, and the leakage amount is ≤0.9ml / min.

[0075] When the sealing is satisfactory, a corresponding pass mark is applied. The machine tool controls the third fixture 4 to automatically perform a punch mark at the designated position using a cylinder. The allowable punch mark size is: maximum width φ1mm and maximum depth 0.5mm. Automatic punching of products that have passed the sealing test can be used to confirm the completion of this production process, facilitating traceability of whether the process is completed and whether the product is qualified after the corresponding process.

[0076] If the sealing is not up to standard, mark it with a red symbol and scrap it.

[0077] S6. Comprehensive inspection and packaging: Manually inspect the product for appearance defects, such as dents, missing parts, residue, excessive air holes, excessive burrs, etc., and remove unqualified parts. Then, package the qualified shells 1. Confirm the quantity during packaging, and prevent incorrect or mixed packaging, collisions, moisture, and scratches on the surface.

[0078] Other aspects of the clamping device for the shell part and the processing method for the shell part described in this invention can be found in the prior art and will not be repeated here.

[0079] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A clamping device for a housing part, characterized in that: The housing includes an end cap and a side plate. The side plate is approximately annular. The end cap seals the upper opening of the side plate and forms a downward-facing cavity. The upper end of the end cap has a first end face with an assembly hole for installing an exhaust pipe. The bottom of the side plate has several horizontally protruding bosses, each with a through hole parallel to the axis of the assembly hole. The side plate has a first arc-shaped surface at one end away from the assembly hole and a second arc-shaped surface at the other end. The housing also has a stepped second end face fixedly connected to the first end face, with the first end face located above the second end face. The clamping device includes a first clamp, which includes a first top plate and a plurality of pressing mechanisms corresponding to the protrusions mounted on the first top plate, at least two first floating supports, a profile block, and positioning posts corresponding to the pressing mechanisms. The side of the molding block closest to the shell is adapted to the first arc-shaped surface; the upper end of the positioning post abuts against the lower end face of a boss, each of the clamping mechanisms abuts against the upper end face of the boss, and each positioning post and the corresponding clamping mechanism clamp a boss together; the first end face protrudes horizontally from the edge of the side plate to form a suspended part, and each of the first floating supports is spaced apart and used to support the suspended part. The clamping device further includes a second clamp, which includes a second top plate, a pressing head, a first pressing rod, a second bottom plate, and a plurality of second columns, a plurality of positioning support columns, a second floating support, a pre-positioning block, and a plurality of positioning pin seats mounted on the second bottom plate. A first punching cylinder is mounted on the second bottom plate. Each of the positioning pin seats is provided with a positioning pin, and each positioning pin corresponds one-to-one with each of the through holes; each of the positioning support columns is used to support the side plate; the upper end of the second floating support can extend into the cavity and abut against the end cap, and the first end face is located above the second floating support; the side of the prepositioning block near the shell matches the second arc-shaped surface; the upper end of each of the second columns is detachably fixedly connected to the second top plate, and the second top plate is used to install the pressing head and the first pressure rod; the bottom of the first pressure rod is provided with a spherical protrusion that can be partially embedded in the exhaust pipe, and the diameter of the spherical protrusion is smaller than the inner diameter of the exhaust pipe; the position of the connection node between the pressing head and the first end face and the second end face corresponds to the position of the pressing head. The clamping device further includes a third clamp, which includes a third drive mechanism, a third top plate, a plug, several second pressure rods, a mounting plate, a third bottom plate, and several third columns and at least two limiting columns mounted on the third bottom plate. A second punching cylinder for automatically punching qualified products is mounted on the third bottom plate. The third bottom plate is used to seal the lower opening of the side plate to seal the cavity. The plug is used to block the upper opening of the exhaust pipe. The mounting plate is located between the third top plate and the third bottom plate. The third driving mechanism is mounted on the third top plate and is used to drive the mounting plate to move up and down in the vertical direction. The upper ends of each of the second pressure rods are fixed below the mounting plate, and the upper ends of each of the limiting posts are located below the mounting plate.

2. The clamping device for the housing part according to claim 1, characterized in that: The first clamp also includes a drive mechanism, a first base plate and several columns. The first base plate is located below the first top plate. The upper end of each column is detachably fixed to the first top plate and the lower end is detachably fixed to the first base plate. The drive mechanism is installed between the first top plate and the first base plate and is used to drive the clamping mechanism to clamp the boss or separate from the boss.

3. The clamping device for the housing part according to claim 1, characterized in that: The second clamp is provided with a second drive mechanism. The output end of the second drive mechanism is provided with a retractable first output shaft. The bottom of the first output shaft is fixedly connected to the clamping head. When the first output shaft is extended, the clamping head abuts against the end cover.

4. A method for processing a shell part, employing the clamping device for the shell part as described in claim 1, characterized in that: Includes the following steps: S1. Machining the first end face: The housing to be machined is fixed on the machining center using the first fixture, with the first end face facing upwards. The milling cutter head moves along a straight path to mill the first end face. When milling the first end face, the machining allowance of the first end face is 0.5mm, the machining feed is ≥0.2mm / r, and the machining speed is ≥7000r / min. S2. Rough and finish drilling and reaming of the exhaust pipe assembly hole: The assembly hole is machined using a PCD drill and reamer that combines roughing and finishing. The machining allowance for the assembly hole is designed to be 0.4mm on each side. A chamfer is then machined at the opening of the assembly hole. S3. Cleaning: Clean the inner and outer surfaces of the housing; S4. Press-fit exhaust pipe + laser marking: A combined press is used, and the combined press is equipped with a second fixture and a laser marking device; S41. Fix the housing onto the second clamp, with the first end face facing upwards, and the second floating support located below the end cap and directly below the assembly hole; S42. After fixing the housing onto the second fixture, drive the clamping head to press down and clamp the workpiece; S43. Apply glue to the mating section between the exhaust pipe and the mounting hole; S44. Attach the exhaust pipe to the first pressure bar of the second clamp; S45. Press the device start button to drive the first pressure rod to press down the exhaust pipe to press the exhaust pipe into the assembly hole. At the same time, record and display the pressing force. S46. Immediately after pressing is completed, use laser to mark the corresponding identification; S5. Sealing test: The housing is fixed with a third clamp and a dry test machine is used to test whether there is leakage in the housing. During the test, the dry test machine is inflated to 150KPa, the inflation time is 10 seconds, the stabilization time is 8 seconds, the detection time is 5 seconds, and the leakage amount is ≤0.9ml / min; When the sealing is qualified, a qualified mark is applied, and the machine tool controls the third fixture to automatically punch the mark at the designated position using a cylinder. The allowable punching mark size is: maximum width φ1mm and maximum depth 0.5mm. If the sealing performance is substandard, mark it with a red symbol and scrap it. S6. Comprehensive inspection and packaging: Manually inspect the product for appearance defects, remove unqualified parts, and package qualified shells.

5. The method for processing housing parts according to claim 4, characterized in that: In step S3, a through-type high-pressure water cleaner is used to clean the surface of the housing. The through-type high-pressure water cleaner has a first tank, a second tank, a third tank, a fourth tank, and a fifth tank connected in sequence. The first tank is a high-pressure water cleaning tank, in which tap water is used for cleaning. The second tank is a medium-pressure water cleaning tank, in which a cleaning agent is used for cleaning. The third tank is a spray cleaning tank, in which a cleaning agent is used for cleaning. The fourth tank is an air blowing tank. The fifth tank is a drying tank, used to dry the residual moisture on the surface of the housing.

6. The method for processing housing parts according to claim 4, characterized in that: In step S4, an automatic glue applicator is used when applying the glue.

7. The method for processing housing parts according to claim 4, characterized in that: In step S5, before conducting a leakage test on the housing parts, the worktable and fixture sealing surfaces are cleaned to ensure that there are no debris on the worktable and fixture sealing surfaces. Then, it is confirmed that the dry testing machine is functioning properly. If it is confirmed to be functioning properly, the dry testing machine can be started to conduct a leakage test. Otherwise, the machine tool needs to be adjusted.

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