Welding fixing device for PCV valve cover

Abstract

The invention discloses a welding fixing device for a PCV valve cover, and belongs to the technical field of welding machining equipment. The device comprises a conveying mechanism, a positioning and welding mechanism is arranged in the middle of one side of the conveying mechanism, the positioning and welding mechanism comprises a mounting push rod, a pressing disc is hinged to a ball head of the output end of the mounting push rod, a clamping frame is fixedly connected to the bottom of the pressing disc, and a butt joint disc is arranged above the pressing disc; a plurality of adjusting pieces are arranged between the edge of the butt joint disc and the edge of the pressing disc, and a welding assembly is arranged below the pressing disc. The valve cover is taken and limited through the clamping frame, a plurality of adjusting pieces are arranged, the posture of the valve cover is detected through a pressure sensor while a mounting push rod keeps pressing, when the valve cover inclines, a pressing disc is driven to rotate through starting of the adjusting push rod, auxiliary adjustment of the posture of the valve cover is achieved, and therefore the valve cover can be conveniently adjusted. Therefore, the welding posture and position stability of the valve cover is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of welding processing equipment, and in particular to a welding fixing device for a PCV valve cover. Background Art

[0002] The PCV valve (Positive Crankcase Ventilation Valve) is a core component of the crankcase ventilation system of an automobile engine. It is mainly used to regulate the circulation and discharge of blowby gases in the crankcase, and has both environmental protection and engine protection functions.

[0003] Existing PCV valves are typically designed with the valve seat integrated with the axle box cover, and the valve cover and axle box cover are fixed together by heat-melt welding. This completely eliminates the risk of air leakage and increases the service life of the device. At the same time, the valve seat and sealing ring can be omitted, reducing the number of parts and lowering costs.

[0004] The mainstream welding method for PCV valves currently involves laser welding, which uses a laser of a specific wavelength to penetrate the upper cover. The laser is absorbed by the underlying material, generating heat energy that melts and fuses the contact surfaces. However, PCV valves are typically made of plastics such as PVC, which has poor thermal stability. Excessive laser power or slow laser speed can cause localized overheating, leading to material decomposition and the release of hydrogen chloride gas, which can form bubbles or holes. This can degrade the PCV valve's structural strength and sealing performance. Furthermore, the softening of the plastic during welding can easily cause the valve cover to shift, compromising the quality of the finished weld. Summary of the Invention

[0005] The present invention provides a welding and fixing device for a PCV valve cover, which can solve the problem in the prior art that the PCV valve is easily displaced during welding.

[0006] The present invention provides a welding and fixing device for a PCV valve cover, comprising a conveying mechanism, a positioning welding mechanism is provided in the middle of one side of the conveying mechanism, the positioning welding mechanism comprises a valve cover positioning assembly and a shift assembly for driving the valve cover positioning assembly to move, the valve cover positioning assembly comprises an installation push rod, the output end ball head of the installation push rod is hinged with a pressing plate, the bottom of the pressing plate is fixedly connected with a clamping frame for installing the valve cover, a docking plate is provided above the pressing plate, a plurality of adjusting parts are provided between the edge of the docking plate and the edge of the pressing plate, the adjusting part comprises an adjusting push rod, the output end of the adjusting push rod is fixedly connected with a docking rod, a pressure sensor is fixedly installed in the middle of the docking rod, one end of the docking rod is hinged with the edge ball head of the docking plate, and a welding assembly is provided below the pressing plate.

[0007] As a further solution of the present invention: the shift assembly includes a welding frame, a lifting push rod is fixedly installed inside the welding frame, the output end of the lifting push rod is fixedly connected to the mounting frame, an extension frame is fixedly connected to the top of one side of the mounting frame, a direction adjustment motor is fixedly installed inside the extension frame, and the output end of the direction adjustment motor is fixedly connected to the mounting push rod.

[0008] As a further solution of the present invention: a positioning frame is provided on the other side of the conveying mechanism, a transverse guide rail is fixedly installed on one side of the positioning frame, a limit frame is slidably installed on the inner wall of the transverse guide rail, and a vibration component is provided inside the limit frame. As a further solution of the present invention: the vibration assembly includes a vibration plate, a plurality of vibration contact rods are fixedly installed on the bottom of the vibration plate, a vibrator is fixedly installed on one side of the inner side of the limit frame, and the output end of the vibrator is in contact with the vibration plate.

[0009] As a further solution of the present invention: a conversion motor is fixedly installed inside the limit frame, the output end of the conversion motor is fixedly connected to the middle of the vibration disk, and contact balls are rotatably installed at the bottom of several vibration contact rods, and the diameters of the several vibration contact rods are different from each other.

[0010] As a further solution of the present invention: the welding assembly includes a mounting ring, a driving ring is rotatably installed inside the mounting ring, a welding head is fixedly installed on the inner wall of the driving ring, a servo motor is fixedly installed inside the mounting ring, the output end of the servo motor is fixedly connected to a driving gear, a driving tooth groove is provided on the outer wall of the driving ring, and the driving gear is meshed with the driving tooth groove.

[0011] As a further solution of the present invention: a plurality of vents are provided on the inner wall edge of the mounting ring, and a smoke exhaust pipe is fixedly connected to one side of the mounting ring.

[0012] As a further solution of the present invention: a loading platform is fixedly installed under the welding frame, a front positioning plate is fixedly connected to one side edge of the loading platform, a side push rod is fixedly installed on the bottom of one side of the positioning frame, and the output end of the side push rod is fixedly connected to the rear positioning plate, and the front positioning plate and the rear positioning plate are arranged correspondingly.

[0013] As a further solution of the present invention: turning motors are fixedly installed at both ends of the loading platform, and the output ends of the two turning motors are fixedly connected to blocking plates.

[0014] As a further solution of the present invention: a loading assembly for loading the valve cover is provided inside the loading platform, and the loading assembly includes a loading turntable, and a plurality of loading troughs are provided on the edge of the loading turntable, and a loading hole is provided on one side of the top of the loading platform, and a lifting push rod is fixedly connected to one side of the bottom of the loading turntable, and a lifting and picking rod is fixedly connected to the output end of the lifting push rod; a loading hole is provided on the other side of the top of the loading platform.

[0015] As a further solution of the present invention: the conveying mechanism includes a conveying platform, and a plurality of conveying rollers are rotatably installed inside the conveying platform.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention uses the clamping frame to pick up and limit the valve cover, and then uses the pushing of the installation push rod to connect the valve cover with the preset installation position on the box body, thereby realizing the positioning installation of the valve cover, and by providing multiple adjustment parts, while the installation push rod keeps pressing, the pressure sensors in the several adjustment parts are used to detect the posture of the valve cover. When the valve cover itself tilts, the pressing plate is driven to rotate by the activation of the adjustment push rod, thereby realizing auxiliary adjustment of the valve cover posture, thereby ensuring the stability of the welding posture position of the valve cover; The present invention provides a vibration assembly and utilizes a vibrator to generate vibration. The vibration is conducted through the vibration plate and the vibration contact rod to vibrate the box body, thereby driving the contact welding position between the valve cover and the box body to vibrate, so that the bubbles generated by the heat at the welding position can be timely gathered and discharged, thereby reducing the residual bubbles at the welding position, improving the structural density of the welding position, and further improving the air tightness of the welding and the structural strength after welding. The vibration plate is driven to rotate by a conversion motor, thereby driving the vibration contact rod to move, so that the contact position between the contact ball and the box body is changed, thereby realizing the adjustment of the vibration intensity of the welding position to meet the vibration intensity requirements of different welding stages. The present invention drives the driving ring to rotate through structures such as servo motors, and then drives the welding head to shift and rotate, thereby achieving uniform welding in all directions; the exhaust of the smoke exhaust pipe generates negative pressure at the positions of several vents, on the one hand, to extract and discharge the waste gas generated by welding, and on the other hand, to increase the gas flow rate in the welding working area inside the mounting ring by utilizing negative pressure exhaust, thereby effectively improving the heat dissipation capacity of the welding position, and assisting in achieving rapid cooling and shaping of the valve cover after welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a three-dimensional Figure 1 ; Figure 2 The present invention is a three-dimensional Figure 2 ; Figure 3 is a side sectional view of the vibration assembly of the present invention; Figure 4 A bottom view of the vibration plate of the present invention; Figure 5 A three-dimensional diagram of the positioning welding mechanism of the present invention; Figure 6 is a cross-sectional view of the adjusting member of the present invention; Figure 7 is a perspective view of the welding assembly of the present invention; Figure 8 is a cross-sectional view of the welding assembly of the present invention; Figure 9 2 is a cross-sectional view of the welding assembly of the present invention.

[0018] Description of reference numerals: 1. Conveying mechanism; 101. Conveying platform; 102. Conveying roller; 103. Front positioning plate; 104. Rear positioning plate; 105. Blocking plate; 106. Turning motor; 2. Positioning welding mechanism; 201. Welding frame; 202. Mounting frame; 203. Extension frame; 204. Mounting push rod; 205. Docking plate; 206. Adjusting member; 2061. Sleeve; 2062. Adjusting push rod; 2063. Docking rod; 2064. Pressure sensor; 207. Pressing plate; 208. Clamping frame; 209. Welding assembly; 2091. Mounting ring; 20 92. Drive ring; 2093. Welding head; 2094. Vent; 2095. Servo motor; 2096. Drive gear; 2097. Exhaust pipe; 301. Positioning frame; 302. Transverse guide rail; 303. Limiting frame; 304. Vibrating plate; 305. Vibrating contact rod; 306. Contact ball; 307. Conversion motor; 308. Vibrator; 401. Loading platform; 402. Loading turntable; 403. Loading motor; 404. Loading chute; 405. Loading hole; 406. Loading hole; 407. Lifting push rod; 5. Axle box; 6. Valve cover. DETAILED DESCRIPTION

[0019] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0020] like Figures 1 to 9 See Figure 1 The present invention provides a PCV valve cover welding and fixing device, including a conveying mechanism 1, which includes a conveying platform 101. The conveying platform 101 has a plurality of conveying rollers 102 rotatably mounted therein. The tops of the conveying rollers 102 are higher than the top surface of the conveying platform 101. When in use, the crankcase 5 is placed on the conveying rollers 102 manually or with an external loading device. The crankcase 5 (hereinafter referred to as the crankcase body) is conveyed by the conveying and rotation of the conveying rollers 102. A positioning welding mechanism 2 is provided in the middle of one side of the conveying mechanism 1, see Figure 5 The positioning welding mechanism 2 includes a valve cover 6 positioning assembly and a shift assembly for driving the valve cover 6 positioning assembly to move. The valve cover 6 positioning assembly includes a mounting push rod 204. The output end ball head of the mounting push rod 204 is hinged with a pressing plate 207. The bottom of the pressing plate 207 is fixedly connected to a clamping frame 208 for mounting the valve cover 6. A docking plate 205 is provided above the pressing plate 207. Several adjusting members 206 are provided between the edge of the docking plate 205 and the edge of the pressing plate 207. Please refer to Figure 6 , the adjusting member 206 includes a sleeve 2061, an adjusting push rod 2062 is installed inside the sleeve 2061, the output end of the adjusting push rod 2062 is fixedly connected to a docking rod 2063, and a pressure sensor 2064 is fixedly installed in the middle of the docking rod 2063. One end of the docking rod 2063 is hinged to the edge ball head of the docking plate 205. The present application is docked with the valve cover 6 through the clamping frame 208, and then the valve cover 6 is docked with the preset installation position on the box body by pushing the installation push rod 204 to realize the positioning installation of the valve cover 6. Since the installation position of the valve cover 6 is often tilted, during welding, due to the pushing pressure of the installation push rod 204, the valve cover 6 is positioned and installed. The force, combined with the softening of the material caused by the heat during welding, makes the posture position of the valve cover 6 very easy to shift. Therefore, in order to maintain a stable limit on the valve cover 6 in the state of tilted welding, the present application provides a plurality of adjusting parts 206. While installing the push rod 204 to maintain pressure, the pressure sensors 2064 in the plurality of adjusting parts 206 are used to detect the posture of the valve cover 6. When the valve cover 6 itself tilts, the reading of the pressure sensor 2064 at the local position will change, and then the pressing plate 207 will be driven to rotate by adjusting the start of the push rod 2062 to realize auxiliary adjustment of the posture of the valve cover 6; thereby ensuring that the welding posture position of the valve cover 6 is stable.

[0021] In one embodiment, a welding assembly 209 is provided below the pressing plate 207. Since the area where the valve cover 6 contacts the box body is annular, in order to achieve uniform welding of the contact position in all directions, please refer to Figure 7 and Figure 8 The welding assembly 209 includes a mounting ring 2091, a driving ring 2092 is rotatably installed inside the mounting ring 2091, a welding head 2093 is fixedly installed on the inner wall of the driving ring 2092, a servo motor 2095 is fixedly installed inside the mounting ring 2091, and a driving gear 2096 is fixedly connected to the output end of the servo motor 2095. A driving tooth groove is provided on the outer wall of the driving ring 2092, and the driving gear 2096 is meshed with the driving tooth groove. The driving ring 2092 is driven to rotate by the servo motor 2095 and other structures, thereby driving the welding head 2093 to shift and rotate, thereby achieving uniform welding in all directions.

[0022] In one embodiment, since the valve cover 6 is often made of plastic materials, such as PVC materials, which are easy to decompose when heated and produce toxic gases, in order to clean and remove the generated gases, a number of air vents 2094 are opened on the inner wall edge of the mounting ring 2091, and a smoke exhaust pipe 2097 is fixedly connected to one side of the mounting ring 2091. One end of the smoke exhaust pipe 2097 is fixedly connected to the air inlet end of an external vacuum pump. The exhaust of the smoke exhaust pipe 2097 generates negative pressure at the positions of the several air vents 2094. On the one hand, the waste gas generated by welding is extracted and discharged. On the other hand, the negative pressure extraction is used to increase the gas flow rate in the welding working area inside the mounting ring 2091, thereby effectively improving the heat dissipation capacity of the welding position, and assisting in achieving rapid cooling and shaping of the valve cover 6 after welding.

[0023] In one embodiment, see Figure 5 In order to realize the movement of the valve cover 6 positioning assembly, the shift assembly includes a welding frame 201, and a lifting push rod is fixedly installed inside the welding frame 201. The output end of the lifting push rod is fixedly connected to the mounting frame 202. The top of one side of the mounting frame 202 is fixedly connected to an extension frame 203. The extension frame 203 is fixedly installed with a direction adjustment motor. The output end of the direction adjustment motor is fixedly connected to the mounting push rod 204. The lifting push rod drives the mounting frame 202 to perform a lifting movement as a whole, thereby realizing the adjustment of the height of the valve cover 6 positioning assembly and the welding assembly 209. The direction adjustment motor is set to drive the valve cover 6 positioning assembly to flip and adjust the overall position, thereby realizing the adjustment of the angle position of the valve cover 6, thereby realizing its alignment with the installation position of the box body.

[0024] In one embodiment, see Figure 1 and Figure 2 In order to achieve the compression and limiting of the top of the box, a positioning frame 301 is provided on the other side of the conveying mechanism 1. A transverse guide rail 302 is fixedly installed on one side of the positioning frame 301, and a limiting frame 303 is slidably installed on the inner wall of the transverse guide rail 302.

[0025] In one embodiment, since the material is easily decomposed by heat during the welding process, bubbles are generated. The presence of bubbles will greatly affect the structural strength after welding and the airtightness of the connection position. For the PCV valve component, airtightness is its key indicator. In order to reduce the generation of welding bubbles, the present application provides a vibration component inside the limit frame 303. Please refer to Figure 3 and Figure 4The vibration component includes a vibration disk 304, and several vibration contact rods 305 are fixedly installed on the bottom of the vibration disk 304. A vibrator 308 is fixedly installed on one side of the inner side of the limit frame 303. The output end of the vibrator 308 is in contact with the vibration disk 304. The vibrator 308 is used to generate vibration. The box body vibrates through the conduction between the vibration disk 304 and the vibration contact rod 305, and then drives the contact welding position between the valve cover 6 and the box body to vibrate, so that the bubbles generated by the heat at the welding position can be gathered and discharged in time, thereby reducing the residual bubbles at the welding position, improving the structural density of the welding position, and further improving the air tightness of the welding and the structural strength after welding.

[0026] In one embodiment, in order to achieve flexible adjustment of the vibration intensity, a conversion motor 307 is fixedly installed inside the limit frame 303, and the output end of the conversion motor 307 is fixedly connected to the middle of the vibration disk 304. The bottom of several vibration contact rods 305 are rotatably installed with contact balls 306. The vibration disk 304 is driven to rotate by the conversion motor 307, and then the vibration contact rods 305 are driven to move, so that the contact position between the contact balls 306 and the box body is changed, thereby achieving adjustment of the vibration intensity of the welding position; the diameter and installation position of the vibration disk 304 are satisfied, and at the same time, only one vibration contact rod 305 is in contact with the box body.

[0027] In one embodiment, the diameters of the plurality of vibration contact rods 305 are different from each other, and the sizes of the contact balls 306 connected to each vibration contact rod 305 are also different, so that the vibration intensity that can be transmitted by each vibration contact rod 305 is also different; in this embodiment, there are three vibration contact rods 305, and the three vibration contact rods 305 are arranged at equal angles, that is, two adjacent vibration contact rods 305 are separated by 120 degrees.

[0028] In one embodiment, see Figure 2 In order to improve the position stability of the box during the welding process, a loading platform 401 is fixedly installed under the welding frame 201, and a front positioning plate 103 is fixedly connected to one side edge of the loading platform 401. A side push rod is fixedly installed on the bottom of one side of the positioning frame 301, and the output end of the side push rod is fixedly connected to the rear positioning plate 104. The front positioning plate 103 and the rear positioning plate 104 are arranged correspondingly, and the side push rod is used to drive the rear positioning plate 104 to move, and then push the box to move toward the front positioning plate 103, so that the box is in stable contact with the front positioning rod, thereby realizing the clamping positioning of the box.

[0029] In one embodiment, see Figure 1 and Figure 2 In order to block the box in the conveying direction, flip motors 106 are fixedly installed at both ends of the loading platform 401, and the output ends of the two flip motors 106 are fixedly connected to the blocking plates 105.

[0030] In one embodiment, see Figure 9 In order to realize automatic loading of the valve cover 6 so that the device can continuously complete the welding of the valve cover 6, a loading assembly for loading the valve cover 6 is provided inside the loading platform 401. The loading assembly includes a loading turntable 402. A plurality of loading troughs 404 are provided on the edge of the loading turntable 402. The inner diameter of the loading trough 404 is consistent with the diameter of the valve cover 6. A retaining ring is provided at the bottom of the inner cavity of the loading trough 404 to prevent the valve cover 6 from falling naturally. A loading hole 405 is provided on one side of the top of the loading platform 401. The bottom side of the loading turntable 402 is fixedly connected There is a lifting push rod 407, and the output end of the lifting push rod 407 is fixedly connected to a lifting and picking rod, and the diameter of the lifting and picking rod is smaller than the inner diameter of the retaining ring; a loading hole 406 is provided on the other side of the top of the loading platform 401, and the loading operation is to load the valve cover 6 into the loading trough 404 through the loading hole 406 by an external device or manually, and during loading, the loading turntable 402 is driven to rotate by the loading motor 403, so that the loading trough 404 with the valve cover 6 is aligned with the loading hole 405, and then the lifting push rod 407 drives the lifting and picking rod to penetrate the loading trough to realize the ejection of the valve cover 6.

[0031] When the present invention is in use, the box is placed on the conveying roller 102 of the conveying platform 101 manually or with an external loading device. The box is conveyed by the rotation of the conveying roller 102. The turning motor 106 away from the loading direction of the box is started first, driving the blocking plate 105 to rotate horizontally. When the box moves to this position, it contacts the blocking plate and stops. Then, another turning motor 106 is started to drive the other blocking plate 105 to be horizontal, and the box is limited from both sides. Then, the side push rod is started to drive the side push rod to drive the rear positioning plate 104 to move, and then push the box to move to the front positioning plate 103, so that the box is stably in contact with the front positioning rod, thereby achieving clamping and positioning of the box. At this time, the traverse guide rail 302 drives the limit frame 303 to move to the top of the box body, the lifting push rod drives the installation frame 202 to rise and fall, and the direction adjustment motor drives the valve cover 6 positioning assembly to rotate as a whole, so that the clamping frame 208 and the valve cover 6 clamped thereon are aligned with the preset installation position on the box body, and the valve cover 6 is pushed out and docked with the installation position through the pushing action of the installation push rod 204, and then the welding head 2093 is started to perform the welding operation on the welding position, and at the same time, the servo motor 2095 drives the driving gear 2096 to rotate, and then drives the driving ring 2092 to rotate, so as to adjust the position of the welding head 2093, thereby meeting the welding needs; During the welding process, due to the pushing pressure of the installation push rod 204 and the softening of the material caused by the heat during welding, the posture position of the valve cover 6 is very easy to shift. When the valve cover 6 itself tilts, it will drive the reading of the pressure sensor 2064 at the local position to change. At this time, by adjusting the starting resistance of the push rod 2062, the reading drives the pressing plate 207 to rotate, thereby realizing auxiliary adjustment of the posture of the valve cover 6; making the readings of each pressure sensor 2064 reply evenly, thereby ensuring the stability of the welding posture position of the valve cover 6; at the same time, the vibrator 308 generates vibration, and the box body vibrates through the conduction of the vibration plate 304 and the vibration contact rod 305, thereby driving the contact welding position of the valve cover 6 and the box body to vibrate, so that the bubbles generated by the heat at the welding position can be timely gathered and discharged. The overall vibration process is divided into three stages. In the first section, the conversion motor 307 drives the vibration disk 304 to rotate, so that one of the vibration contact rods 305 contacts the top edge of the box. At this time, the vibration conduction position is farthest from the welding position and the vibration is weakest. Then the conversion motor 307 drives the vibration disk 304 to continue to rotate, so that the vibration contact rod 305 moves to the position closest to the welding position. In this process, the vibration intensity gradually increases, and then the conversion motor 307 drives the vibration disk 304 to continue to rotate, so that the vibration contact rod 305 moves gradually away from the welding position, so that the vibration intensity gradually decreases, thereby realizing a gradual change in vibration intensity during the vibration process, so that it can correspond to the heating, melting and cooling and setting processes in the welding process, thereby achieving effective discharge of bubbles without affecting the strength of the welding structure; After welding is completed, the lifting push rod and the pressing push rod are reset, and then the two flip motors 106 drive the blocking plate 105 to lift up and avoid, and the box is sent out by the rotation of the conveying roller 102; at this time, the direction adjustment motor drives the valve cover 6 positioning assembly to rotate downward as a whole, so that the clamping frame 208 is aligned with the loading hole 405, and then the lifting push rod drives the mounting frame 202 and the valve cover 6 positioning assembly to move downward as a whole, and the lifting push rod 407 drives the lifting material rod to push upward into the loading trough 404, pushing out the valve cover 6 inside it, so that its top is docked with the clamping frame 208, completing a loading operation to facilitate subsequent use.

[0032] The above disclosures are only a few specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A welding fixture for a PCV valve cover, characterized in that: The invention comprises a conveying mechanism (1), wherein a positioning welding mechanism (2) is provided in the middle of one side of the conveying mechanism (1), wherein the positioning welding mechanism (2) comprises a valve cover (6) positioning component and a displacement component for driving the valve cover (6) positioning component to move, wherein the valve cover (6) positioning component comprises a mounting push rod (204), wherein the ball head at the output end of the mounting push rod (204) is hingedly connected to a pressing plate (207), wherein the bottom of the pressing plate (207) is fixedly connected to a clamping frame (208) for mounting the valve cover (6), and a clamping frame (208) for mounting the valve cover (6) is provided above the pressing plate (207). A docking plate (205) is provided with a plurality of adjusting members (206) between the edge of the docking plate (205) and the edge of the pressure plate. The adjusting member (206) includes an adjusting push rod (2062). The output end of the adjusting push rod (2062) is fixedly connected to a docking rod (2063). A pressure sensor (2064) is fixedly installed in the middle of the docking rod (2063). One end of the docking rod (2063) is hinged to the ball head at the edge of the docking plate (205). A welding assembly (209) is provided below the pressure plate (207).

2. A PCV valve cover welding fixture as claimed in claim 1, characterized in that: The shift assembly comprises a welding frame (201), a lifting push rod is fixedly installed inside the welding frame (201), an output end of the lifting push rod is fixedly connected to a mounting frame (202), an extension frame (203) is fixedly connected to the top of one side of the mounting frame (202), a direction adjustment motor is fixedly installed inside the extension frame (203), and the output end of the direction adjustment motor is fixedly connected to the mounting push rod (204).

3. A PCV valve cover welding fixture as claimed in claim 2, characterized in that: A positioning frame (301) is provided on the other side of the conveying mechanism (1), a transverse guide rail (302) is fixedly mounted on one side of the positioning frame (301), a limiting frame (303) is slidably mounted on the inner wall of the transverse guide rail (302), and a vibration component is provided inside the limiting frame (303).

4. A PCV valve cover welding fixture as claimed in claim 3, characterized in that: The vibration assembly comprises a vibration disk (304), a plurality of vibration contact rods (305) are fixedly mounted on the bottom of the vibration disk (304), a vibrator (308) is fixedly mounted on one side of the interior of the limiting frame (303), and an output end of the vibrator (308) contacts the vibration disk (304).

5. A PCV valve cover welding and fixing device as claimed in claim 4, characterized in that: A conversion motor (307) is fixedly installed inside the limiting frame (303), and the output end of the conversion motor (307) is fixedly connected to the middle of the vibration plate (304). Contact balls (306) are rotatably installed at the bottoms of the plurality of vibration contact rods (305), and the diameters of the plurality of vibration contact rods (305) are different from each other.

6. A PCV valve cover welding fixture as claimed in claim 1, characterized in that: The welding assembly (209) comprises a mounting ring (2091), a driving ring (2092) being rotatably mounted inside the mounting ring (2091), a welding head (2093) being fixedly mounted on the inner wall of the driving ring (2092), a servo motor (2095) being fixedly mounted inside the mounting ring (2091), a driving gear (2096) being fixedly connected to the output end of the servo motor (2095), a driving tooth groove being provided on the outer wall of the driving ring (2092), and the driving gear (2096) being meshedly connected to the driving tooth groove.

7. A PCV valve cover welding fixture as claimed in claim 6, characterized in that: A plurality of vents (2094) are provided on the inner wall edge of the mounting ring (2091), and a smoke exhaust pipe (2097) is fixedly connected to one side of the mounting ring (2091).

8. A PCV valve cover welding fixture as claimed in claim 3, characterized in that: A loading platform (401) is fixedly installed below the welding frame (201), a front positioning plate (103) is fixedly connected to one side edge of the loading platform (401), a side push rod is fixedly installed on the bottom of one side of the positioning frame (301), an output end of the side push rod is fixedly connected to a rear positioning plate (104), and the front positioning plate (103) and the rear positioning plate (104) are correspondingly arranged.

9. A PCV valve cover welding fixture as claimed in claim 8, characterized in that: Both ends of the loading platform (401) are fixedly mounted with turning motors (106), and the output ends of the two turning motors (106) are fixedly connected with blocking plates (105).

10. The PCV valve cover welding fixture as claimed in claim 8, characterized in that: A loading assembly for loading the valve cover (6) is provided inside the loading platform (401), and the loading assembly includes a loading turntable (402), a plurality of loading troughs (404) are provided on the edge of the loading turntable (402), a loading hole (405) is provided on one side of the top of the loading platform (401), a lifting push rod (407) is fixedly connected to one side of the bottom of the loading turntable (402), and a lifting and picking rod is fixedly connected to the output end of the lifting push rod (407); and a loading hole (406) is provided on the other side of the top of the loading platform (401).

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