A seamless treatment apparatus for stainless steel welded pipes

Abstract

The present application relates to a kind of stainless steel welded pipe seamless treatment equipment, including frame, inner shell one, height detection module, interference removal module, expansion module, inner shell two, fine grinding tool, tool changing module.The present application detects and removes interference grinding to the height of weld, avoids the collision situation possibly caused by the different height of weld, avoids the long-time use of the same tool by rotation type grinding, prolongs the service life of tool, and carries out targeted expansion area detection and removal grinding for possible weld tumor, carries out air suction recovery for large particle steel chips, avoids scratch on the surface of welded pipe, ensures to eliminate the visible difference on the surface of welded pipe, and improves the quality of welded pipe.

Description

Technical Field

[0001] This invention relates to the technical field of seamless welded pipe processing, and in particular to a seamless processing equipment for stainless steel welded pipes. Background Technology

[0002] Seamless treatment of welded pipes refers to the polishing and sandblasting of the weld seam and the surface of the steel plate, making the weld seam invisible to the naked eye, just like the surface of the base stainless steel plate. People have long recognized that stainless steel welded pipes are superior to stainless steel seamless pipes in terms of material properties and mechanical performance. However, how to remove the excess weld seam in stainless steel welded pipes has always been a challenge.

[0003] In existing seamless steel pipe processing, such as Chinese Patent No. CN113478373A, a manufacturing method and preparation device for high-frequency welded seamless steel pipe is disclosed. A first motor is fixedly installed at the top of the working chamber, a screw is fixedly connected to the output end of the first motor, a fixed plate is drivenly connected to the screw, multiple polishing discs are slidably connected to the fixed plate, a first movable plate and a second movable plate are slidably installed at the bottom of the working chamber, and a first fixed frame and a second fixed frame are spaced apart between the first movable plate and the second movable plate. The first fixed frame and the second fixed frame are fixedly installed at the bottom of the working chamber.

[0004] In the aforementioned prior art, multiple polishing discs are used to polish multiple welded pipes simultaneously. However, the prior art does not take into account the varying heights of the weld seams on the welded pipes. If the weld seam is excessively high in some areas, the polishing discs may collide with the weld seam, causing damage. Furthermore, the polishing discs are easily worn out due to long-term polishing work and need to be replaced frequently, increasing costs. During the welding process, weld beads may sometimes appear on the surface of the welded pipe. These weld beads may be far from the weld seam and also require focused polishing. Moreover, the polishing process may produce some large steel chips, which may scratch the surface of the welded pipe and affect its appearance.

[0005] Therefore, there is still room for improvement in the aforementioned existing technologies. Summary of the Invention

[0006] To treat the weld seam of stainless steel welded pipes and eliminate the visual difference between the weld seam area and the normal area, this application provides a seamless treatment device for stainless steel welded pipes, which adopts the following technical solution:

[0007] A seamless stainless steel welded pipe processing device includes a frame, an inner shell I, a height detection module, an interference removal module, an expansion module, an inner shell II, fine grinding tools, and a tool changing module. The inner shell I is rotatably mounted on the frame via a coarse grinding electric slider. The height detection module is slidably mounted within the inner shell I. The interference removal module is installed inside the inner shell I. When the height detection module detects that the weld height is too high, it triggers the interference removal module to grind the excessively high weld to remove interference. The expansion module is installed inside the frame and detects and grinds diffused weld beads. The inner shell II is slidably mounted within the frame via a fine grinding electric slider. The fine grinding tools are mounted within the inner shell II via the tool changing module. During the weld grinding process, the fine grinding tools are periodically switched via the tool changing module, thereby extending the service life of the fine grinding tools.

[0008] Preferably, the frame includes a front frame and a rear frame. The front frame is provided with a guide rail that cooperates with the coarse grinding electric slider. The arc-shaped guide rail is coaxially arranged with the stainless steel welded pipe. The coarse grinding electric slider drives the inner shell to slide back and forth on the guide rail (sliding along a left-right arc trajectory), thereby enabling the interference removal module to perform interference removal grinding on the excessively high weld seam. The top of the rear frame is provided with a drive electric slider, which is installed in the work area through a drive rail. During grinding, the drive electric slider continuously drives the frame to move from one end of the welded pipe to the other end, repeating back and forth until the grinding work is completed.

[0009] Preferably, the height detection module includes a movable frame, a detection element, and a guide pin. The movable frame is slidably disposed on the top of the inner housing, and there are two movable frames. A return spring is connected between the movable frame and the inner housing, and the return spring serves as a reset function. The detection element is slidably disposed on the movable frame. The bottom of the L-shaped detection element is arc-shaped, and the bottom axis of the detection element coincides with the axis of the stainless steel welded pipe. The distance between the bottom surface of the detection element and the surface of the stainless steel welded pipe is a fixed value (this fixed value is the detection judgment range of the detection element. When the height of a certain part of the weld exceeds this fixed value, the detection element is triggered). A tension spring is connected between the detection element and the movable frame, and the tension spring serves as a reset function. The guide pin is installed on the detection element.

[0010] Preferably, the interference removal module includes an outer cylinder, a coarse grinding section, an electric push rod, and an expansion mechanism. The outer cylinder is installed on the top inner wall of the inner shell and is located between the movable frames. The coarse grinding section is slidably disposed in the outer cylinder through an auxiliary component. A compression spring connects the coarse grinding section and the outer cylinder, and the compression spring serves as a reset mechanism. Guide grooves are symmetrically provided on the left and right side walls of the coarse grinding section. A guide pin is slidably disposed in the guide groove. The guide groove consists of a front inclined groove and a rear vertical groove. Since the height of the guide pin remains constant in the vertical direction, when the guide pin slides in the inclined groove, the guide pin presses against the inclined groove, causing the coarse grinding section to move downward. When the guide pin is located in the vertical groove, the horizontal position of the guide pin is temporarily locked. The electric push rod is installed on the top inner wall of the outer cylinder. A top support head is installed at the lower end of the electric push rod, and the top support head contacts the auxiliary component. The expansion mechanism is disposed in the installation cavity opened inside the coarse grinding section. During the descent of the coarse grinding section, the expansion mechanism pushes the detection component to both sides to avoid interference between the coarse grinding section and the detection component.

[0011] Preferably, the expansion mechanism includes a first gear, a drive rack plate, a second gear, a pulley, and an outward push rack plate. The first gear is rotatably disposed in the mounting cavity. The lower end of the drive rack plate is located in the mounting cavity, and the upper end of the drive rack plate is mounted on the top inner wall of the inner housing. The position of the drive rack plate corresponds to that of the first gear. Initially, the drive rack plate and the first gear are not meshed. The second gear is rotatably disposed in the mounting cavity. The second gear and the first gear are engaged by a pulley. Outward push rack plates are meshed on the upper and lower sides of the second gear, respectively. The outward push rack plates are slidably disposed in the mounting cavity. The outer diameter of the second gear is much larger than that of the first gear. When the first gear drives the second gear to rotate through the pulley, the linear velocity of the outer circumference of the second gear is much greater than that of the first gear, thereby ensuring that the outward push rack plate meshing with the second gear can move outward a sufficient distance to push the detection piece away.

[0012] Preferably, the expansion module includes a mounting component, an L-shaped plate, a deburring section, an extruder, an extrusion plate, and a trigger. The mounting components are installed in the rear frame, and the distance between the mounting components is less than the width of the coarse grinding section, so that the expansion module can grind areas outside the grinding range of the coarse grinding section. An L-shaped plate is installed on the rear side wall of the mounting component. The deburring section is slidably disposed inside the mounting component and performs deburring operations on areas outside the grinding range of the fine grinding tool. A helical spring connects the deburring section and the mounting component, and the helical spring always maintains a downward pushing tendency on the deburring section. The lower rear side of the deburring section has an angled structure, and an extrusion groove is opened in the middle of the deburring section. An extruder corresponding to the position of the extrusion groove is slidably disposed on the side wall of the mounting component. An L-shaped extrusion plate is installed at the rear end of the extruder. The inner shell two in the initial state (at this time, the inner shell two is at the foremost position) contacts the extrusion plate and squeezes the extruder into the extrusion groove, so that the deburring section is in the highest position, the helical spring is compressed, and at the same time, the extrusion plate squeezes the slide rod, causing the trigger to be positioned... Directly below the deburring section, when the grinding operation begins, the fine grinding electric slider drives the inner housing away from the extrusion plate and enters a rapid back-and-forth sliding working state. A pressure spring connects the extrusion part and the mounting part, and the pressure spring plays a reset role. The trigger is mounted on the L-shaped plate through an elastic telescopic rod. The position of the sliding rod corresponds to that of the extrusion plate. The upper front side of the trigger is inclined. In the initial state, the upper end of the trigger and the lower end of the deburring section have a small amount of straight overlap in the back-and-forth direction (at this time, the trigger is not under any force in the back-and-forth direction. Even if the weld bead is too brittle, the trigger can be moved backward to avoid the situation where the weld bead breaks after contact with the brittle weld bead and the trigger fails to trigger. This broken weld bead will greatly affect the surface quality of the welded pipe). When the trigger is squeezed backward by the weld bead, the upper front inclined structure of the trigger corresponds to the lower rear oblique structure of the deburring section. The deburring section moves downward under the action of the helical spring to help the trigger move backward. The extended deburring section grinds the weld bead.

[0013] Preferably, the fine grinding tool includes a first fine grinding section, a second fine grinding section, and a third fine grinding section. The first, second, and third fine grinding sections have the same structure and size. The initial grinding is performed by the second fine grinding section, and subsequently, the first, second, and third fine grinding sections alternately grind the weld. The lower surface of the first fine grinding section has an installation groove, in which a transition grinding section is slidably disposed. A flexible spring connects the transition grinding section and the installation groove, and the flexible spring acts as a buffer. After the interference removal module performs interference removal grinding on the weld, the transition grinding section performs elastic semi-fine grinding on the interference removal grinding area to avoid incomplete interference removal at the weld. This serves as a transition for the subsequent fine grinding by the first fine grinding section. The transition grinding section has uniformly distributed storage grooves, and a gas absorption storage box is installed on the upper surface of the first fine grinding section. The gas absorption storage box is connected to the storage grooves. The debris generated when the transition grinding section grinds the weld enters the storage grooves and is then absorbed by the gas absorption storage box.

[0014] Preferably, the tool changing module includes a switching cylinder, a first connecting column, a locking mechanism, a second connecting column, a first connecting rod, a second connecting rod, an auxiliary plate, an interaction plate, and an interaction plate. The switching cylinder is installed on the top inner wall of the inner housing 2. The first connecting column is installed on the output end of the switching cylinder. The lower end of the first connecting column is slidably engaged with the second connecting column via a sliding column. The position between the first and second connecting columns is temporarily locked by the locking mechanism. The lower end of the second connecting column is fixedly installed with a second fine grinding part. The two ends of the first connecting rod are respectively rotatably engaged with a first fixed part and a first sliding part via pins. The first fixed part is installed on the upper surface of the first fine grinding part. The first sliding part is slidably disposed in a sliding groove 1 opened on one side wall of the connecting column. The two ends of the second connecting rod are respectively rotatably engaged with a second fixed part and a second sliding part via pins. The second fixed part is installed on the upper surface of the third fine grinding part. The second sliding part slides up and down. The first and third fine grinding parts are temporarily stationary in the sliding grooves on the side walls of the connecting column. When the switching cylinder drives the connecting column to rise, the second fine grinding part immediately rises. However, the first and second sliding parts slide relative to each other in the sliding grooves, so the first and third fine grinding parts remain stationary temporarily, thus avoiding collision and interference with the rising second fine grinding part. Moreover, the length of the sliding groove is less than the length of the sliding groove, which allows the first fine grinding part to remain stationary for a longer time, providing conditions for the mutual switching between the first, second, and third fine grinding parts. The connecting rod is a telescopic structure. The auxiliary plate is installed on the bottom inner wall of the inner housing. The auxiliary plate has a switching groove. The rear ends of the first and second fixed parts are slidably set in the switching groove. The rear ends of the first and second fixed parts are respectively equipped with the interaction plate.

[0015] Preferably, the locking mechanism includes a locking post, a locking pin, and a spring-loaded pin. The locking post is installed at the lower end of the first connecting post. A hidden groove is formed on the outer periphery of the locking post, and the locking pin is slidably disposed in the hidden groove. A return spring is connected between the locking pin and the hidden groove, and the return spring plays a reset role. An insertion groove corresponding to the position of the locking post is formed on the upper end of the second connecting post. A locking groove corresponding to the position of the locking pin is formed on the side wall of the insertion groove. The locking pin is inserted into the locking groove to lock the position between the locking post and the second connecting post. The upper end of the locking groove has a beveled structure, and the spring-loaded pin is slidably disposed on the connecting post. In the structure, the structure is installed on the inner wall of the inner shell 2. The position of the spring-loaded pin corresponds to that of the locking groove. An ejector spring is connected between the spring-loaded pin and the structure. The ejector spring always pushes the spring-loaded pin in the direction of the locking pin. When the locking groove gradually rises to correspond to the position of the spring-loaded pin, the spring-loaded pin is inserted into the locking groove under the action of the ejector spring and squeezes the locking pin out of the locking groove, thereby unlocking the locking pin and the connecting pin 2. When the locking groove descends, the inclined structure at the upper end of the locking groove is squeezed against the spring-loaded pin, thereby causing the spring-loaded pin to disengage from the locking groove.

[0016] In summary, the beneficial technical effects of this application are as follows:

[0017] The stainless steel welded pipe seamless processing equipment described in this invention avoids collisions caused by uneven weld heights by detecting and interfering with the weld height through grinding. The rotating grinding method avoids prolonged use of the same tool, extending the tool's service life. Targeted wide-area detection and removal grinding are performed to address potential weld beads. Large steel shavings are recovered by air suction to prevent scratches on the welded pipe surface, ensuring the elimination of visible differences on the welded pipe surface and improving the quality of the welded pipe. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0020] Figure 3 This is a cross-sectional view of the overall structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure between the height detection module and the interference removal module of the present invention;

[0022] Figure 5 This is a schematic diagram of the external expansion mechanism of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure between the precision grinding tool and the tool changing module of the present invention (viewed from front to back);

[0024] Figure 7 This is a schematic diagram of the structure between the precision grinding tool and the tool changing module of the present invention (viewed from back to front);

[0025] Figure 8 This is a schematic diagram of the locking mechanism of the present invention;

[0026] Figure 9 This is a schematic diagram of the structure of the extension module of the present invention;

[0027] Figure 10 This is a schematic diagram of the invention installed on the drive slide rail.

[0028] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Inner shell one; 3. Height detection module; 4. Interference removal module; 5. Expansion module; 6. Inner shell two; 7. Fine grinding tool; 8. Tool changing module; 31. Movable frame; 32. Detection component; 33. Guide pin; 41. Outer cylinder; 42. Rough grinding section; 43. Electric push rod; 44. Outward expansion mechanism; 441. First gear; 442. Drive rack plate; 443. Second gear; 444. Pulley; 445. Outward push rack plate; 51. Mounting component; 52. L-shaped plate; 53. Nodule removal section; 54. Extrusion component; 55. Extrusion plate; 56. Trigger; 71. First fine grinding section; 72. Second fine grinding section; 73. Third fine grinding section; 711. Over-grinding section; 712. Gas absorption box; 81. Switching cylinder; 82. Connecting post one; 821. Sliding groove one; 83. Locking mechanism; 84. Connecting post two; 841. Sliding groove two; 85. Connecting rod one; 86. Connecting rod two; 87. Auxiliary plate; 88. Interaction plate one; 89. Interaction plate two; 831. Locking post; 832. Locking pin; 833. Spring pin; a. Guide groove; b. Repositioning groove; c. Locking groove. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-10 This application will be described in further detail.

[0030] This application discloses a seamless processing device for stainless steel welded pipes. By detecting the height of the weld seam, interference-free grinding is performed on excessively high weld seams to avoid collision interference. The use of a rotating grinding method extends the service life of the device. The device detects the location of weld beads and grinds them, absorbing large steel chips to avoid scratching the welded pipe and ensuring the quality of the welded pipe.

[0031] Reference Figure 1 , Figure 2As shown, a seamless stainless steel welded pipe processing device includes a frame 1, an inner shell 2, a height detection module 3, an interference removal module 4, an expansion module 5, an inner shell 6, a fine grinding tool 7, and a tool changing module 8. The inner shell 2 is rotatably mounted on the frame 1 via a coarse grinding electric slider. The height detection module 3 is slidably mounted in the inner shell 2. The interference removal module 4 is installed inside the inner shell 2. When the height detection module 3 detects that the weld height is too high, it triggers the interference removal module 4 to grind the excessively high weld to remove interference. The expansion module 5 is installed inside the frame 1. The expansion module 5 detects and grinds diffused weld beads. The inner shell 6 is slidably mounted in the frame 1 via a fine grinding electric slider. The fine grinding tool 7 is mounted in the inner shell 6 via the tool changing module 8. During the grinding process of the weld, the fine grinding tool 7 is periodically switched by the tool changing module 8, thereby extending the service life of the fine grinding tool 7.

[0032] In the actual weld processing, frame 1 moves from one end of the welded pipe to the other. During this movement, height detection module 3 detects the height of the weld area on the surface of the welded pipe. When height detection module 3 detects that the height of a certain part of the weld is too high, it triggers interference removal module 4 to descend, thereby removing interference and grinding the excessively high part of the weld. Then, fine grinding tool 7 performs fine grinding on the weld after interference removal. Extension module 5 continuously detects weld beads on both sides of the weld (areas that fine grinding tool 7 cannot grind) and grinds the detected weld beads. When frame 1 moves from one end of the welded pipe to the other... After the end moves to the other end, the tool changing module 8 switches the fine grinding tool 7. The fine grinding tool 7, after being switched, continues to follow the movement of the frame 1 to grind the weld. The fine grinding tool 7 is always in the switching state until the grinding is completed. This application avoids collisions that may be caused by uneven weld heights by detecting the height of the weld and performing interference-free grinding. The rotational grinding method avoids the long-term use of the same tool, extending the tool's service life. Targeted expanded-area detection and removal grinding are performed for possible weld beads to ensure the elimination of visible differences on the welded pipe surface and improve the quality of the welded pipe.

[0033] Reference Figure 1 As shown, the frame 1 includes a front frame and a rear frame. The front frame is equipped with a guide rail that cooperates with the coarse grinding electric slider. The arc-shaped guide rail is coaxially arranged with the stainless steel welded pipe. The coarse grinding electric slider drives the inner shell 2 to slide back and forth on the guide rail (sliding along a left-right arc trajectory), thereby enabling the interference removal module 4 to perform interference removal grinding on the excessively high weld seam. The top of the rear frame is equipped with a drive electric slider, which is installed in the work area through a drive rail. During grinding, the drive electric slider continuously drives the frame 1 to move from one end of the welded pipe to the other end, repeating back and forth until the grinding work is completed.

[0034] Reference Figure 4 , Figure 5 As shown, the height of the weld is not uniform. If the height of the weld is too high, collision interference may occur when the fine grinding tool 7 performs fine grinding on the weld. In order to avoid interference, this application provides a height detection module 3 and an interference removal module 4. The height detection module 3 includes a movable frame 31, a detection element 32, and a guide pin 33. The movable frame 31 is slidably disposed on the top of the inner shell 2. There are two movable frames 31. A return spring is connected between the movable frame 31 and the inner shell 2. The return spring plays a reset role. The detection element 32 is slidably disposed in the movable frame 31. The bottom of the L-shaped detection element 32 is arc-shaped. The bottom axis of the detection element 32 coincides with the axis of the stainless steel welded pipe. The bottom surface of the detection element 32 is a fixed value away from the surface of the stainless steel welded pipe (this fixed value is the detection judgment range of the detection element 32. When the height of a certain part of the weld exceeds this fixed value, the detection element 32 is triggered). A tension spring is connected between the detection element 32 and the movable frame 31. The tension spring plays a reset role. The guide pin 33 is installed on the detection element 32.

[0035] Reference Figure 3 , Figure 4 As shown, the interference removal module 4 includes an outer cylinder 41, a coarse grinding section 42, an electric push rod 43, and an expansion mechanism 44. The outer cylinder 41 is installed on the top inner wall of the inner shell 2, and is located between the movable frames 31. The coarse grinding section 42 is slidably disposed in the outer cylinder 41 through an auxiliary component. A compression spring is connected between the coarse grinding section 42 and the outer cylinder 41, and the compression spring plays a reset role. Guide grooves a are symmetrically opened on the left and right side walls of the coarse grinding section 42, and guide pins 33 are slidably disposed in the guide grooves a. The guide grooves a consist of an inclined groove at the front and a vertical groove at the rear. Due to the height of the guide pins 33 in the vertical direction... The degree remains unchanged. When the guide pin 33 slides in the inclined groove, the guide pin 33 presses the inclined groove, causing the coarse grinding part 42 to move downward. When the guide pin 33 is in the vertical groove, the horizontal position of the guide pin 33 is temporarily locked. The electric push rod 43 is installed on the top inner wall of the outer cylinder 41. The lower end of the electric push rod 43 is equipped with a top support head, and the top support head is in contact with the auxiliary component. The expansion mechanism 44 is set in the installation cavity opened inside the coarse grinding part 42. During the descent of the coarse grinding part 42, the expansion mechanism 44 pushes the detection component 32 to both sides to avoid interference between the coarse grinding part 42 and the detection component 32.

[0036] During the actual interference removal process, when the local protrusion of the weld is too high and comes into contact with the detection piece 32, the detection piece 32 is obstructed and temporarily stops moving forward. The movable frame 31 stops moving forward, while the inner shell 2 continues to move forward, causing relative sliding between the movable frame 31 and the inner shell 2. The coarse grinding part 42 gradually approaches the lower transverse part of the detection piece 32, and the inclined groove and the guide pin 33 are squeezed together, causing the coarse grinding part 42 to gradually descend and grind the protrusion of the weld. As the coarse grinding part 42 moves, when the vertical groove moves to the position corresponding to the guide pin 33, the guide pin 33 can no longer make the coarse grinding part 42 move forward. As the device continues to descend, the electric push rod 43 is activated, pushing the coarse grinding section 42 to continue descending (at this time, the guide pin 33 slides up and down in the vertical groove). The expansion mechanism 44 is triggered, pushing the detection piece 32 to both sides in the left and right directions, thereby avoiding the descending coarse grinding section 42. This allows the coarse grinding section 42 to grind the weld protrusions that are blocked by the detection piece 32. After grinding is completed, the electric push rod 43 resets, the coarse grinding section 42 resets under the action of the compression spring, the movable frame 31 resets under the action of the return spring, and the detection piece 32 resets under the action of the tension spring.

[0037] Reference Figure 3 , Figure 5 As shown, a portion of the weld protrusion is obscured by the inspection piece 32, preventing the coarse grinding part 42 from grinding. To remove the inspection piece 32, this application provides an expansion mechanism 44. The expansion mechanism 44 includes a first gear 441, a drive rack plate 442, a second gear 443, a pulley 444, and an outward push rack plate 445. The first gear 441 is rotatably mounted in the mounting cavity. The lower end of the drive rack plate 442 is located in the mounting cavity, and the upper end of the drive rack plate 442 is mounted on the top inner wall of the inner housing 2. The position of the drive rack plate 442 corresponds to that of the first gear 441. In the initial state, the drive rack plate 442 and the first gear 441 are not... The second gear 443 is rotatably mounted in the mounting cavity. The second gear 443 and the first gear 441 are engaged by a pulley 444. The upper and lower sides of the second gear 443 are respectively engaged with outward push rack plates 445. The outward push rack plates 445 are slidably mounted in the mounting cavity. The outer diameter of the second gear 443 is much larger than that of the first gear 441. When the first gear 441 drives the second gear 443 to rotate through the pulley 444, the linear velocity of the outer circumference of the second gear 443 is much greater than that of the first gear 441, thereby ensuring that the outward push rack plates 445 engaged with the second gear 443 can move outward a sufficient distance to push the detection piece 32 away.

[0038] During the actual process of expanding the test piece 32, the pressure between the inclined groove and the guide pin 33 causes the coarse grinding part 42 to gradually descend. At this time, the first gear 441 and the drive rack plate 442 gradually come into contact but do not mesh. When the electric push rod 43 pushes the coarse grinding part 42 to descend, the first gear 441 meshes with the drive rack plate 442 and rotates. Under the action of the pulley 444, the second gear 443 rotates. The outward push rack plate 445, which meshes with the second gear 443, gradually pushes the test piece 32 to separate to both sides, thereby exposing the covered weld seam under the coarse grinding part 42, so that the coarse grinding part 42 grinds this part of the weld seam.

[0039] Reference Figure 9As shown, during welding, the molten metal may flow under its own weight and form weld beads upon solidification. These weld beads may be some distance from the weld. To treat these weld beads, this application provides an extension module 5. The extension module 5 includes a mounting component 51, an L-shaped plate 52, a weld bead removal section 53, an extrusion component 54, an extrusion plate 55, and a trigger component 56. The mounting component 51 is installed in the rear frame, and the distance between the mounting components 51 is less than the width of the coarse grinding section 42, thereby allowing the extension module 5 to grind areas outside the grinding range of the coarse grinding section 42. The L-shaped plate 52 is installed on the rear side wall of the mounting component 51, and the weld bead removal section 53 is slidably positioned up and down. Inside the mounting part 51, the deburring section 53 performs deburring operations on the area outside the grinding range of the fine grinding tool 7. A helical spring connects the deburring section 53 and the mounting part 51. The helical spring always maintains a downward pushing tendency on the deburring section 53. The lower rear end of the deburring section 53 has an angled structure, and a pressing groove is opened in the middle of the deburring section 53. A pressing member 54 corresponding to the position of the pressing groove is slidably arranged on the side wall of the mounting part 51. An L-shaped pressing plate 55 is installed at the rear end of the pressing member 54. The inner shell 6 in the initial state (at this time, the inner shell 6 is at the foremost position) contacts the pressing plate 55, pressing the pressing member 54 into the pressing groove. This positions the de-burring section 53 at its highest point, compressing the helical spring. Simultaneously, the extrusion plate 55 presses against the slide bar, positioning the trigger 56 directly below the de-burring section 53. When grinding begins, the fine grinding electric slider moves the inner housing 6 away from the extrusion plate 55, entering a rapid back-and-forth sliding state. A pressure spring connects the extrusion member 54 and the mounting member 51, acting as a reset mechanism. The trigger 56 is mounted on the L-shaped plate 52 via an elastic telescopic rod, with the slide bar corresponding to the extrusion plate 55. The upper front of the trigger 56 has an inclined structure. Initially, the upper end of the trigger 56 and the lower end of the de-burring section 53 are positioned at the front. There is a small amount of straight overlap in the rear direction (at this time, the trigger 56 is in a state of no force in the front-back direction, so even if the weld bead is too brittle, the trigger 56 can be moved backward to avoid the situation where the trigger 56 breaks after contact with the brittle weld bead and the trigger 56 does not trigger. This broken weld bead will greatly affect the surface quality of the welded pipe). When the trigger 56 is squeezed backward by the weld bead, the upper front inclined structure of the trigger 56 corresponds to the lower rear oblique structure of the de-welding part 53. The de-welding part 53 moves downward under the action of the helical spring to help the trigger 56 move backward, and the extended de-welding part 53 grinds the weld bead.

[0040] In the actual process of removing weld beads, the trigger 56 is attached to the surface of the welded pipe. When weld beads appear, the trigger 56 is obstructed by the weld beads and thus retracts relative to the removal part 53. The removal part 53 extends under the action of the helical spring to grind the weld beads. When the frame 1 moves from one end of the welded pipe to the other end, the inner shell 6 is temporarily reset under the drive of the precision grinding electric slider. The reset inner shell 6 presses the extrusion plate 55, causing the extrusion member 54 to press the extrusion groove, thereby causing the removal part 53 to move upward and re-enter the mounting part 51. The extrusion plate 55 presses the slide bar, causing the trigger 56 to reset. When the inner housing 6 enters the working state again, the extrusion plate 55 is no longer extruded. Under the action of the pressure spring, the extrusion member 54 disengages from the extrusion groove and resets. However, at this time, the trigger 56 is located at the bottom of the de-scraping section 53. The upper end of the trigger 56 and the lower end of the de-scraping section 53 have a small amount of straight overlap in the front-back direction. Therefore, the de-scraping section 53 cannot descend. The position between the de-scraping section 53 and the trigger 56 remains unchanged until the trigger 56 touches a new weld bead.

[0041] Reference Figure 6 As shown, this application includes a fine grinding tool 7 for fine grinding of the weld. The fine grinding tool 7 includes a first fine grinding section 71, a second fine grinding section 72, and a third fine grinding section 73. The first fine grinding section 71, the second fine grinding section 72, and the third fine grinding section 73 have the same structure and size. The initial grinding is performed by the second fine grinding section 72, and subsequently, the first fine grinding section 71, the second fine grinding section 72, and the third fine grinding section 73 alternately grind the weld. The lower surface of the first fine grinding section 71 has a mounting groove, and an intermediate grinding section 711 is slidably disposed in the mounting groove. The intermediate grinding section 711 is positioned between the intermediate grinding section 711 and the mounting groove. A flexible spring is connected, which acts as a buffer. After the interference removal module 4 performs interference removal grinding on the weld, the transition grinding part 711 performs elastic semi-fine grinding on the interference removal grinding area to avoid incomplete interference removal at the weld. This serves as a transition for the subsequent fine grinding by the first fine grinding part 71. The transition grinding part 711 has evenly spaced storage grooves. A gas absorption storage box 712 is installed on the upper surface of the first fine grinding part 71. The gas absorption storage box 712 is connected to the storage groove. The debris generated when the transition grinding part 711 grinds the weld enters the storage groove and is absorbed by the gas absorption storage box 712.

[0042] During the actual fine grinding process, as the frame 1 moves from one end of the welded pipe to the other, the over-grinding part 711 comes into contact with the weld that has undergone interference removal grinding. The over-grinding part 711 performs elastic semi-fine grinding on the weld that has undergone interference removal grinding. The gas absorption box 712 collects the steel chips generated during grinding through the collection groove (at this time, the weld has just undergone rough grinding to remove interference, so there may be large steel chips. Collecting them can prevent the steel chips from scratching the surface of the welded pipe). Then, the first fine grinding part 71 performs fine grinding on the weld.

[0043] Reference Figure 3 , Figures 6-8 As shown, in order to increase the service life of the cutting tools and avoid using the same tool for sharpening for a long time, this application provides a tool changing module 8. The tool changing module 8 includes a switching cylinder 81, a first connecting column 82, a locking mechanism 83, a second connecting column 84, a first connecting rod 85, a second connecting rod 86, an auxiliary plate 87, an interaction plate 88, and an interaction plate 89. The switching cylinder 81 is installed on the top inner wall of the inner housing 6. The first connecting column 82 is installed on the output end of the switching cylinder 81. The lower end of the first connecting column 82 is slidably engaged with a sliding column. The position between connecting post 2 84 and connecting post 1 82 is temporarily locked by locking mechanism 83. A second fine grinding part 72 is fixedly installed at the lower end of connecting post 2 84. Connecting rod 1 85 has a fixed part 1 and a sliding part 1 respectively rotatably fitted at both ends via pins. The fixed part 1 is installed on the upper surface of the first fine grinding part 71, and the sliding part 1 is slidably disposed in a sliding groove 821 opened on the side wall of connecting post 1 82. Connecting rod 2 86 has a fixed part 2 and a sliding part 2 respectively rotatably fitted at both ends via pins. The fixed part 2 is installed... Mounted on the upper surface of the third fine grinding section 73, the second sliding part is slidably disposed in the second sliding groove 841 opened in the side wall of the second connecting column 84. When the switching cylinder 81 drives the first connecting column 82 to rise, the second fine grinding section 72 immediately rises. However, the first sliding part slides relative to the second sliding part in the first sliding groove 821, and the second sliding part slides relative to the second sliding groove 841. Therefore, the first fine grinding section 71 and the third fine grinding section 73 will temporarily remain stationary, thereby avoiding collision and interference with the rising second fine grinding section 72. The second sliding groove 841 is also slidably disposed in the side wall of the second connecting column 841. The length of 1 is less than the length of the sliding groove 821, which allows the first fine grinding section 71 to remain stationary for a longer time, providing conditions for the switching between the first fine grinding section 71, the second fine grinding section 72, and the third fine grinding section 73. The connecting rod 86 is a telescopic structure. The auxiliary plate 87 is installed on the bottom inner wall of the inner housing 6. The auxiliary plate 87 is provided with a switching groove b. The rear ends of the first and second fixing parts are slidably arranged in the switching groove b. The rear ends of the first and second fixing parts are respectively equipped with the interaction plate 88 and the interaction plate 89.

[0044] During the actual switching process, the second fine grinding section 72 is in the working position to grind the weld. After the second fine grinding section 72 grinds from one end of the welded pipe to the other end, the switching cylinder 81 is activated. The activated switching cylinder 81 drives the first connecting column 82 to rise, and the second connecting column 84 to rise. The second fine grinding section 72 rises synchronously with the second connecting column 84. The first sliding section slides relative to the second sliding section 821, and the second sliding section slides relative to the second sliding section 841. When the second sliding section moves to the bottom of the second sliding section 841... As connecting post 2 84 continues to rise, under the action of connecting rod 2 86, fixing part 2 slides in the shifting groove b. Third fine grinding part 73 moves towards the position of second fine grinding part 72 (initial working position). Interaction plate 2 89 gradually approaches interaction plate 1 88. Connecting post 2 84 stops after moving to the designated position. At this time, third fine grinding part 73 moves to the working position, interaction plate 2 89 contacts interaction plate 1 88, and the position between connecting post 1 82 and connecting post 2 84 is unlocked. Sliding part 1 slides into the sliding groove. At the bottom of 821, the third fine grinding section 73 grinds the weld. After the third fine grinding section 73 grinds from one end of the welded pipe to the other, the switching cylinder 81 drives the connecting column 82 to continue rising. Under the action of the connecting rod 85, the fixing part 1 slides in the shifting groove b, the first fine grinding section 71 moves to the working position, the interaction plate 88 presses the interaction plate 89, causing the fixing part 2 to slide in the shifting groove b as well, the connecting rod 86 is stretched, the third fine grinding section 73 leaves the working position and gradually resets, and the connecting column 84... After moving to the designated position, it stops again. At this time, the first fine grinding section 71 moves to the working position. Then, the first fine grinding section 71 grinds the weld. When the first fine grinding section 71 grinds from one end of the welded pipe to the other end, the switching cylinder 81 pushes the connecting column 82 down to the bottom. The first fine grinding section 71 resets, the connecting rod 86 resets, and the second fine grinding section 72 resets, thus completing the cyclic switching between the first fine grinding section 71, the second fine grinding section 72, and the third fine grinding section 73. This cycle repeats until the weld is ground.

[0045] Reference Figure 8As shown, this application includes a locking mechanism 83 to lock the position between connecting post 1 82 and connecting post 2 84. The locking mechanism 83 includes a locking post 831, a locking pin 832, and a spring-loaded pin 833. The locking post 831 is installed at the lower end of connecting post 1 82. A hidden groove is formed on the outer periphery of the locking post 831, and the locking pin 832 is slidably disposed in the hidden groove. A return spring connects the locking pin 832 and the hidden groove, and the return spring performs a reset function. An insertion groove corresponding to the position of the locking post 831 is formed at the upper end of connecting post 2 84. A locking groove c corresponding to the position of the locking pin 832 is formed on the side wall of the insertion groove. The locking pin 832 is inserted into the locking groove c, thereby locking the position between the locking post 831 and connecting post 2 84. The upper end has a sloping structure, and the spring-loaded pin 833 is slidably disposed in the structural part. The structural part is installed on the inner wall of the inner shell 6. The spring-loaded pin 833 is positioned corresponding to the locking groove c. An ejector spring is connected between the spring-loaded pin 833 and the structural part. The ejector spring always pushes the spring-loaded pin 833 towards the locking pin 831. When the locking groove c gradually rises to the position corresponding to the spring-loaded pin 833, the spring-loaded pin 833 is inserted into the locking groove c under the action of the ejector spring and the locking pin 832 is squeezed out of the locking groove c, thereby unlocking the locking pin 831 and the connecting pin 84. When the locking groove c descends, the sloping structure at the upper end of the locking groove c is squeezed against the spring-loaded pin 833, thereby causing the spring-loaded pin 833 to disengage from the locking groove c.

[0046] In the actual unlocking process, when connecting post 1 82 moves upward to the designated position, the position between locking groove c and spring pin 833 corresponds. Under the action of the ejection spring, spring pin 833 inserts into locking groove c and pushes out locking pin 832 from locking groove c, thereby unlocking the locking post 831 and connecting post 2 84. When connecting post 1 82 descends, the inclined structure at the upper end of locking groove c is squeezed against spring pin 833, so that spring pin 833 can be smoothly disengaged from locking groove c. Locking post 831 is inserted into the bottom of insertion groove, and locking pin 832 corresponds to the position of locking groove c. Under the action of the return spring, locking pin 832 is inserted into locking groove c to lock the position of locking post 831 and the position between connecting post 1 82 and connecting post 2 84.

[0047] The implementation principle of this embodiment is as follows:

[0048] Step 1: Install the drive rail in the work area, and then install this application on the drive rail (as shown in the attached document). Figure 10 (as shown);

[0049] Step 2: Fix the welded pipe to be processed with the weld seam facing upwards under this application, and then start this application;

[0050] Step 3: Frame 1 moves from one end of the welded pipe to the other end. During the movement, the fine grinding tool 7 performs fine grinding on the weld.

[0051] Step 4: When the height detection module 3 detects that the height of a certain part of the weld is too high, the height detection module 3 triggers the interference removal module 4 to descend, thereby performing interference removal grinding on the excessively high part of the weld;

[0052] Step 5: When the expansion module 5 detects weld beads, it is triggered to grind the weld beads.

[0053] Step 6: After frame 1 moves from one end of the welded pipe to the other end, tool changing module 8 switches the fine grinding tool 7. After switching, the fine grinding tool 7 continues to follow the movement of frame 1 to grind the weld. The fine grinding tool 7 is always in the switching state until the grinding is completed.

[0054] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A seamless processing device for stainless steel welded pipes, characterized in that, include: Framework (1); The inner shell (2) is mounted on the frame (1) by a coarse grinding electric slider; The height detection module (3) is slidably disposed in the inner housing (2); The interference removal module (4) is installed inside the inner shell (2). After the height detection module (3) detects that the height of the weld is too high, it triggers the interference removal module (4) to grind the excessively high weld to remove interference. An expansion module (5) is installed inside the frame (1) to detect and grind the diffused weld beads; The inner shell (6) is set in the frame (1) by a finely ground electric slider that slides back and forth. The precision grinding tool (7) is installed in the inner shell (6) through the tool changing module (8). During the grinding process of the weld, the precision grinding tool (7) is periodically switched through the tool changing module (8), which extends the service life of the precision grinding tool (7). The frame (1) includes a front frame and a rear frame. The front frame is provided with a guide rail that cooperates with the coarse grinding electric slider. The arc-shaped guide rail and the stainless steel welded pipe are arranged coaxially. The top of the rear frame is provided with a drive electric slider. The height detection module (3) includes: The movable frame (31) is slidably disposed on the top of the inner shell (2). There are two movable frames (31). A return spring is connected between the movable frame (31) and the inner shell (2). The detection component (32) is slidably set in the movable frame (31). The bottom of the L-shaped detection component (32) is arc-shaped. A tension spring connects the detection component (32) and the movable frame (31). Guide pin (33), which is installed on the testing piece (32); The interference removal module (4) includes: The outer cylinder (41) is installed on the top inner wall of the inner shell (2), and the outer cylinder (41) is located between the movable frames (31); The coarse grinding part (42) is slidably disposed in the outer cylinder (41) through an auxiliary component. A compression spring is connected between the coarse grinding part (42) and the outer cylinder (41). Guide grooves (a) are symmetrically provided on the left and right side walls of the coarse grinding part (42), and guide pins (33) are slidably disposed in the guide grooves (a). An electric push rod (43) is installed on the top inner wall of the outer cylinder (41). The lower end of the electric push rod (43) is equipped with a top support head, and the top support head is in contact with the auxiliary component. An expansion mechanism (44) is set in an installation cavity inside the coarse grinding section (42). During the descent of the coarse grinding section (42), the expansion mechanism (44) pushes the detection piece (32) to both sides to avoid interference between the coarse grinding section (42) and the detection piece (32). The extension module (5) includes: Mounting component (51) is installed in the rear frame, and an L-shaped plate (52) is installed on the rear side wall of the mounting component (51); The tumour removal part (53) is slidably disposed inside the mounting part (51). A helical spring is connected between the tumour removal part (53) and the mounting part (51). The lower rear end of the tumour removal part (53) has an angled structure. An extrusion groove is provided in the middle of the tumour removal part (53). An extrusion part (54) corresponding to the position of the extrusion groove is slidably disposed on the side wall of the mounting part (51). A pressure spring is connected between the extrusion part (54) and the mounting part (51). An L-shaped extrusion plate (55) is installed at the rear end of the extrusion part (54). The trigger (56) is slidably mounted on the L-shaped plate (52) by means of a slide rod. The position of the slide rod corresponds to that of the extrusion plate (55). The upper front side of the trigger (56) is an inclined structure. The precision grinding tool (7) includes a first precision grinding section (71), a second precision grinding section (72), and a third precision grinding section (73). The first precision grinding section (71), the second precision grinding section (72), and the third precision grinding section (73) have the same structure and size. The lower surface of the first precision grinding section (71) has an installation groove at the front end. The lower surface of the first precision grinding section (71) is a grinding layer at the rear end. An over-grinding section (711) is slidably disposed in the installation groove. A flexible spring is connected between the over-grinding section (711) and the installation groove. A storage groove is evenly disposed on the over-grinding section (711). An air absorption storage box (712) is installed on the upper surface of the first precision grinding section (71). The air absorption storage box (712) is connected to the storage groove. The tool changing module (8) includes: A switching cylinder (81) is installed on the top inner wall of the inner housing (6). A connecting column (82) is installed on the output end of the switching cylinder (81). A connecting column (84) is slidably fitted to the lower end of the connecting column (82) through a sliding column. The position between the connecting column (82) and the connecting column (84) is temporarily locked by a locking mechanism (83). A second fine grinding part (72) is fixedly installed on the lower end of the connecting column (84). The connecting rod (85) has a fixed part and a sliding part at both ends respectively connected by a pin. The fixed part is installed on the upper surface of the first fine grinding part (71), and the sliding part is slidably disposed in the sliding groove (821) opened on the side wall of the connecting column (82). The second connecting rod (86) has a fixed part and a sliding part at both ends respectively through a pin. The fixed part is installed on the upper surface of the third fine grinding part (73), and the sliding part is slidably disposed in the sliding groove (841) opened on the side wall of the second connecting column (84). The second connecting rod (86) is a telescopic structure. An auxiliary plate (87) is installed on the bottom inner wall of the inner shell (6). A repositioning groove (b) is provided on the auxiliary plate (87). The rear ends of the fixing part 1 and the fixing part 2 are slidably disposed in the repositioning groove (b). Interactive plate 1 (88) and interactive plate 2 (89) are respectively installed at the rear ends of the fixing part 1 and the fixing part 2.

2. The seamless processing equipment for stainless steel welded pipes according to claim 1, characterized in that, The expansion mechanism (44) includes: The first gear (441) is rotatably disposed in the mounting cavity; The lower end of the drive rack plate (442) is located in the mounting cavity, and the upper end of the drive rack plate (442) is mounted on the top inner wall of the inner housing (2). The position of the drive rack plate (442) corresponds to that of the first gear (441). The second gear (443) is rotatably disposed in the mounting cavity. The second gear (443) and the first gear (441) are engaged by a pulley (444). The upper and lower sides of the second gear (443) are respectively meshed with an outward push rack plate (445), which is slidably disposed in the mounting cavity.

3. The seamless processing equipment for stainless steel welded pipes according to claim 1, characterized in that, The locking mechanism (83) includes: A locking post (831) is installed at the lower end of the connecting post one (82). A hidden groove is provided on the outer periphery of the locking post (831). A locking pin (832) is slidably disposed in the hidden groove. A return spring is connected between the locking pin (832) and the hidden groove. An insertion groove corresponding to the position of the locking post (831) is provided at the upper end of the connecting post two (84). A locking groove (c) corresponding to the position of the locking pin (832) is provided on the side wall of the insertion groove. The upper end of the locking groove (c) is a sloping structure. The spring-loaded pin (833) is slidably disposed in the structural part, which is installed on the inner wall of the inner housing (6). The spring-loaded pin (833) and the locking groove (c) are positioned correspondingly, and an ejector spring is connected between the spring-loaded pin (833) and the structural part.

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