A tool clamp for machining a centrifugal pump accessory

Abstract

The present application relates to the technical field of centrifugal pump, specifically to a tool clamp for centrifugal pump accessory machining, which comprises a pair of opposite seats, rotating shafts and a clamping mechanism, the clamping mechanism comprises an inner ring, the inner ring is fixedly sleeved on the two rotating shafts, the opposite faces of the two rotating shafts are fixedly provided with rotating blocks, a supporting part is arranged between the two rotating blocks, the supporting part supports a lower cover plate and tightly presses an upper cover plate and a blade onto the lower cover plate, and the clamping mechanism further comprises a pushing group for pushing the blade between the upper cover plate and the lower cover plate. The lower cover plate, the blade and the upper cover plate are placed in sequence from bottom to top, clamped and locked, so that the three are in a state ready for welding, the welding process between the upper cover plate and the blade is carried out first, and then the welding process of the lower cover plate and the blade is directly carried out by turning over 180 degrees, avoiding the cumbersome steps of taking out the semi-finished product and re-clamping and locking, eliminating the need for twice tool clamping steps, simplifying the machining process and improving the machining efficiency.

Description

Technical Field

[0001] This invention relates to the field of centrifugal pump technology, specifically to a tooling fixture for processing centrifugal pump parts. Background Technology

[0002] A centrifugal pump is a type of pump that uses the centrifugal force generated by the rotation of an impeller to transport fluids. It is widely used in various fields such as industry, agriculture, and municipal engineering to transport a variety of fluids, including water, oil, and chemical media. The main components of a centrifugal pump include the impeller, pump casing, shaft, seals, coupling, and base. Among these, the impeller is the core component of the centrifugal pump, and its high-speed rotation enables the fluid to acquire velocity and pressure.

[0003] See Figure 9 The impeller mainly consists of blades, an upper cover plate, and a lower cover plate. Multiple blades are circumferentially distributed and welded between the upper and lower cover plates. During impeller processing, the impeller is usually clamped by two workstations. In one workstation, the blades are first placed in the corresponding slots of the fixture, so that the blades are in a set state. Then, the upper cover plate is placed on all the blades and the clamping fixture is used. After that, each blade is welded to the upper cover plate by laser welding equipment. After this step, the welded semi-finished product is moved to the other workstation and flipped so that the blades are above the upper cover plate. Then, the lower cover plate is placed on the blades and clamped and pressed. Welding is performed again to obtain the finished impeller.

[0004] The existing impeller processing has the following problems: When welding a finished impeller, two separate welding operations are required, one between the upper cover plate and the blades, and the other between the lower cover plate and the blades. Between the two welding operations, it is necessary to manually unlock the corresponding fixture from the workstation, take out the semi-finished impeller, and then put it back into the fixture in the other workstation for clamping and locking again. The whole process is cumbersome, the processing tooling is inefficient, and it is not conducive to the mass production of impellers.

[0005] Secondly, in the current tooling process, the upper cover plate, blades and lower cover plate are mainly locked to the workstation through multi-point clamping and locking. Most of them are locked and unlocked one by one, which is cumbersome and the tooling efficiency is poor. Summary of the Invention

[0006] Therefore, it is necessary to provide a tooling fixture for processing centrifugal pump parts, which aims to solve the problems of the prior art.

[0007] This application provides a tooling fixture for processing centrifugal pump accessories, which is set on a movable seat in a laser welding equipment. It includes: a worktable, with a worktable provided on the front side of the movable seat, and two opposing seats fixedly arranged on the worktable. Rotating shafts are rotatably provided on the opposite surfaces of the two opposing seats, and a clamping mechanism is provided between the two rotating shafts.

[0008] The clamping mechanism includes an inner ring, which is fixedly sleeved on two rotating shafts. Rotating blocks are fixedly arranged on the opposite surfaces of the two rotating shafts. A support part is provided between the two rotating blocks. The support part supports the lower cover plate and presses the upper cover plate and blade tightly onto the lower cover plate.

[0009] The supporting part includes supporting components. Two symmetrical supporting components are provided on the opposite sides of the two rotating blocks. The supporting components include a pressing block and a fixing block. The upper fixing block is used to press down the upper cover plate and the lower fixing block is used to support the lower cover plate.

[0010] The clamping mechanism also includes a pushing group, on which the inner ring is provided for pushing the blade to the space between the upper and lower cover plates in a set state. The pushing group includes multiple pushing plates that slide radially along the inner ring.

[0011] The inner ring is provided with a locking group for locking the upper and lower cover plates and for driving the push group to push.

[0012] The movable base is provided with a locking part for locking the inner ring angle.

[0013] According to an advantageous embodiment, the two rotating blocks facing each other are provided with sliding grooves, and a sliding block is slidably disposed in the sliding groove. The abutting block in the upper support assembly is fixedly disposed on the sliding block. A return spring is fixedly disposed between the sliding block and the inner wall of the sliding groove. The abutting block in the lower support assembly is fixedly disposed on the rotating block.

[0014] According to an advantageous embodiment, the lower end of the sidewall of the upper abutment block facing the inner ring axis is chamfered, and the sidewalls of the abutment block facing the inner ring axis are all arc-shaped surfaces that fit against the circumferential surface of the upper or lower cover plate.

[0015] According to an advantageous embodiment, the pushing assembly further includes sliding columns, with a plurality of circumferentially evenly distributed sliding columns sliding through the inner ring along its radial direction. The pushing plate is fixedly mounted on the sliding columns, and two magnetic suction plates are hinged to the end face of the pushing plate facing the inner ring axis. The two magnetic suction plates have the same curvature as the two arc surfaces of the same blade. The blade is placed by the two magnetic suction plates holding the blade and making the outer side of the blade press against the pushing plate, so that the blade is in the desired state.

[0016] According to an advantageous embodiment, an L-shaped support is slidably sleeved on the sliding column. The horizontal section of the support penetrates the push plate along the axial direction of the sliding column. A return spring is fixedly installed between the vertical section of the support and the push plate. The end face of the horizontal section of the support near the inner ring axis and the end face of the push plate in contact with the lower cover plate are both arc-shaped surfaces that fit with the circumferential surface of the lower cover plate. During the placement stage, the horizontal section of the support supports the blade. After the blade is placed on the lower cover plate, the lower cover plate abuts against the horizontal section of the support and causes the horizontal section to retract.

[0017] According to an advantageous embodiment, the pushing group further includes an outer ring, and the circumferential surface of the inner ring is provided with two outer rings that are symmetrical about each other and whose axes are collinear with the axis of the inner ring through multiple sliding bars. A wedge block corresponding to the sliding column is fixedly provided between the two outer rings, and the multiple wedge blocks are circumferentially distributed.

[0018] The end face of the wedge block facing the inner ring is an arc-shaped surface that deflects backward from right to left. The end face of the sliding column facing the outer ring is fixedly provided with a mating block that mates with the arc-shaped surface of the wedge block. A reset spring three sleeved on the sliding column is fixedly provided between the mating block and the inner ring.

[0019] According to an advantageous embodiment, the locking assembly includes push sliders, two push sliders are slidably disposed on the inner ring, an operating bar is fixedly disposed on the push sliders, and a pressure spring is fixedly disposed between the operating bar and the adjacent sliding bar.

[0020] According to an advantageous embodiment, a locking hole is provided on the inner ring, and a locking pin is provided on the upper surface of the push slider to slide up and down. A return spring is fixedly provided between the locking pin and the push slider.

[0021] According to an advantageous embodiment, the locking assembly further includes a guide post, a guide post with a vertical axis is fixedly provided on the upper end face of the lower abutment block, a through hole is provided on the upper abutment block, a locking groove is provided circumferentially through the guide post, and a locking strip is fixedly provided on the push slider.

[0022] According to an advantageous embodiment, the locking part includes a U-shaped locking block, and a U-shaped locking block with a U-shaped opening facing forward is slidably disposed on the movable seat, the U-shaped area of ​​the U-shaped locking block fitting with two outer rings.

[0023] In summary, the present invention has at least one of the following beneficial effects: First, by placing the lower cover plate, blade, and upper cover plate sequentially from bottom to top and clamping and locking them, the three are in a state to be welded. The welding process between the upper cover plate and the blade is performed first, and then the welding process between the lower cover plate and the blade is performed directly by flipping 180 degrees. This avoids the cumbersome steps of taking out the semi-finished product and re-clamping and locking it, and eliminates the need for two tooling clamping steps, simplifying the tooling process and improving the efficiency of the tooling.

[0024] Second, in the process of pushing the slider to move, all blades are first driven to move synchronously to the center of the lower cover plate to the set area. As the movement continues, the upper cover plate, lower cover plate and blades are locked. The locking process is convenient and avoids the cumbersome clamping and locking steps in the existing locking process. At the same time, it is only necessary to pull the locking pin upward to unlock the locked state, so that the finished impeller can be directly taken out. The unlocking process is convenient. In summary, the convenience of the processing tooling process is improved. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 A three-dimensional structural schematic diagram of a tooling fixture for machining centrifugal pump accessories provided according to an embodiment of the present invention is shown.

[0027] Figure 2 A top view of the support assembly, inner ring, and outer ring provided according to an embodiment of the present invention is shown.

[0028] Figure 3 A top view of the structure between the inner ring, the mating block, and the push plate provided according to an embodiment of the present invention is shown.

[0029] Figure 4 A schematic diagram illustrating the movement process of a push plate according to an embodiment of the present invention is shown.

[0030] Figure 5 A partially exploded three-dimensional cross-sectional view of the rotating block, locking bar, and pushing slider provided according to an embodiment of the present invention is shown.

[0031] Figure 6 The present invention provides an embodiment of the invention. Figure 5 Enlarged view of point A in the middle.

[0032] Figure 7 The present invention provides an embodiment of the invention. Figure 5 Enlarged view of point B in the middle.

[0033] Figure 8 A partial cross-sectional perspective view of the three-dimensional structure between the rotating block, the clamping plate, and the fixing block provided according to an embodiment of the present invention is shown.

[0034] Figure 9 An exploded three-dimensional structural diagram of an impeller provided according to an embodiment of the present invention is shown.

[0035] The above-mentioned figures include the following reference numerals: 1. Worktable; 2. Opposing seat; 3. Rotating shaft; 4. Clamping mechanism; 40. Inner ring; 41. Rotating block; 42. Support part; 420. Support assembly; 4200. Pressing block; 4201. Fixing block; 422. Sliding block; 423. Return spring one; 43. Pushing assembly; 430. Pushing plate; 431. Sliding column; 432. Magnetic suction plate; 433. Supporting component; 434. Return spring Spring 2; 435, Outer Ring; 436, Wedge Block; 437, Mating Block; 438, Return Spring 3; 44, Locking Assembly; 440, Operating Bar; 441, Pressure Spring; 442, Synchronizing Component; 443, Locking Hole; 444, Locking Pin; 445, Return Spring 4; 446, Guide Post; 448, Locking Groove; 449, Locking Bar; 450, Push Slider; 46, U-Shaped Block; 5, Upper Cover Plate; 6, Blade; 7, Lower Cover Plate. Detailed Implementation

[0036] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] like Figure 1 and Figure 2 As shown, a tooling fixture for processing centrifugal pump parts is set on a movable seat in a laser welding equipment, including: a worktable 1, the worktable 1 is provided on the front side of the movable seat, two opposing seats 2 are fixedly arranged on the worktable 1, and a rotating shaft 3 is rotatably arranged on the opposite face of the two opposing seats 2. The rotating shaft 3 is driven to rotate by an external servo motor, and a clamping mechanism 4 is provided between the two rotating shafts 3.

[0038] like Figure 1 and Figure 9 As shown, the clamping mechanism 4 includes an inner ring 40, and the inner ring 40 is fixedly sleeved on both rotating shafts 3. Rotating blocks 41 are fixedly arranged on the opposite surfaces of the two rotating shafts 3. A support part 42 is arranged between the two rotating blocks 41. The support part 42 supports the lower cover plate 7 and presses the upper cover plate 5 and the blade 6 tightly onto the lower cover plate 7.

[0039] like Figure 1 , Figure 2 , Figure 5 and Figure 8As shown, the support part 42 includes a support component 420. Two symmetrical support components 420 are provided on the opposite sides of the two rotating blocks 41. The support component 420 includes a pressing block 4200 for pressing against the upper cover plate 5 or the lower cover plate 7 from the left and right, and a fixing block 4201. The upper fixing block 4201 is used to press down the upper cover plate 5, and the lower fixing block 4201 is used to support the lower cover plate 7. The upper support component 420 is slidably disposed on the rotating block 41, and the lower support component 420 is fixedly disposed on the rotating block 41. It should be noted that the vertical projection area of ​​the support component 420 on the upper cover plate 5 and the lower cover plate 7 is staggered from the welding route of all blades 6.

[0040] like Figure 1 , Figure 3 and Figure 4 As shown, the clamping mechanism 4 also includes a pushing group 43. The inner ring 40 is provided with a pushing group 43 for pushing the blade 6 to the space between the upper cover plate 5 and the lower cover plate 7 in a set state. The pushing group 43 includes a plurality of pushing plates 430 that slide radially along the inner ring 40.

[0041] like Figure 1 and Figure 2 As shown, the inner ring 40 is provided with a locking group 44 for locking the upper cover plate 5 and the lower cover plate 7 and for driving the push group 43 to push. The locking group 44 locks the upper cover plate 5, the lower cover plate 7 and the blade 6 into a fitting state.

[0042] like Figure 1 As shown, the movable seat is provided with a locking part for locking the angle of the inner ring 40, so that the inner ring 40 is in a horizontal state.

[0043] During operation, the locking mechanism locks the inner ring 40, ensuring it is horizontal. This facilitates placement and locking of the upper cover plate 5, lower cover plate 7, and blade 6 in a horizontal position. The lower cover plate 7 is then manually placed into the inner ring 40, where it is supported by fixing blocks 4201 in the two supporting components 420 on the lower side. Two clamping blocks 4200 clamp and limit the lower cover plate 7, ensuring it is horizontal and its axis is collinear with the axis of the inner ring 40, improving clamping accuracy. The blade 6 is then manually placed into the pushing assembly 43, ensuring it is in a pre-welded state. The upper cover plate 5 is then placed above the blade 6. The locking assembly 44 is then manually operated to first push... The pusher plate 430 in the feed group 43 pushes the blade 6 between the upper cover plate 5 and the lower cover plate 7, so that the upper cover plate 5, the blade 6 and the lower cover plate 7 are tightly attached and rigidly locked. Then the laser welding equipment works to perform laser welding on the upper cover plate 5 and the blade 6. After the upper cover plate 5 is welded, the locking part works to release the lock, and at the same time the external servo motor works to make the inner ring 40 rotate 180 degrees. The locking part locks again, so that the inner ring 40, the upper cover plate 5 and the lower cover plate 7 are locked again. At this time, the lower cover plate 7 is above the upper cover plate 5. The laser welding equipment works again to weld the lower cover plate 7 and the blade 6. Finally, the locking group 44 is released and the welded parts are removed manually.

[0044] like Figure 1 , Figure 5 and Figure 8 As shown, the two rotating blocks 41 facing each other on the left and right have sliding grooves. A sliding block 422 is slidably disposed in the sliding groove. The abutting block 4200 in the upper support assembly 420 is fixedly disposed on the sliding block 422. A return spring 423 is fixedly disposed between the sliding block 422 and the inner wall of the sliding groove. The abutting block 4200 in the lower support assembly 420 is fixedly disposed on the rotating block 41.

[0045] The lower end of the side wall of the upper abutment block 4200 facing the axis of the inner ring 40 is chamfered. The side walls of the abutment block 4200 facing the axis of the inner ring 40 are all arc-shaped surfaces that fit against the circumferential surface of the upper cover plate 5 or the lower cover plate 7.

[0046] To facilitate the placement of the lower cover plate 7 between the abutment blocks 4200 in the two lower support components 420, the upper ends of the opposite sides of the two lower abutment blocks 4200 are chamfered. This allows the lower cover plate 7 to be accurately placed between the two lower abutment blocks 4200 during placement. The cooperation between the two lower abutment blocks 4200 limits the circumferential movement of the lower cover plate 7, ensuring that the axis of the lower cover plate 7 is collinear with the axis of the inner ring 40. After the lower cover plate 7 is placed on the two lower fixing blocks 4201, it is in a horizontal position.

[0047] After placing the lower cover plate 7 and blade 6, the upper cover plate 5 needs to be placed on top of the blade 6. Regarding the placement and positioning of the upper cover plate 5, the following should be noted: First, manually move the upper abutment block 4200 upwards, causing the return spring 423 to deform. Then, place the upper cover plate 5 on the blade 6, ensuring it is flush with the upper surface of the blade 6. Adjust the position of the upper cover plate 5 so that it is initially aligned vertically with the lower cover plate 7. Then, manually release the upper abutment block 4200. The elastic force generated by the deformation of the return spring 423 will cause the upper abutment block 4200 to return to its original position. The upper cover plate 5 is moved down, and the inclined surface at the chamfer of the upper abutment block 4200 cooperates with the upper cover plate 5 to press the position of the upper cover plate 5, so that the upper cover plate 5 is finally located between the two upper abutment blocks 4200. At this time, the upper cover plate 5 is circumferentially limited by the arc surface on the two abutment blocks 4200. Therefore, the axes of the upper cover plate 5 and the lower cover plate 7 are collinear with the axis of the inner ring 40. As the upper abutment block 4200 continues to move down, the upper fixing block 4201 presses down on the upper cover plate 5. At this time, the upper cover plate 5, the blade 6 and the lower cover plate 7 are tightly attached to each other, and are in a state ready for welding processing.

[0048] like Figure 1 , Figure 2 and Figure 3 As shown, the pushing group 43 also includes a sliding column 431. Multiple circumferentially evenly distributed sliding columns 431 slide through the inner ring 40 along its radial direction. The pushing plate 430 is fixedly mounted on the sliding column 431. Two magnetic suction plates 432 are hinged to the end face of the pushing plate 430 facing the axis of the inner ring 40 by a torsion spring (not shown in the figure). The two magnetic suction plates 432 have the same curvature as the two arc surfaces of the same blade 6. The blade 6 is attracted by the two magnetic suction plates 432 and the end of the blade 6 away from the axis of the inner ring is pressed against the pushing plate 430 to complete the placement process of the blade 6, so that the blade 6 is in the desired state.

[0049] like Figure 2 , Figure 3 and Figure 4 As shown, an L-shaped support member 433 is slidably sleeved on the sliding column 431. The horizontal section of the support member 433 passes through the push plate 430 along the axial direction of the sliding column 431. A reset spring 434 is fixedly installed between the vertical section of the support member 433 and the push plate 430. The end face of the horizontal section of the support member 433 near the axis of the inner ring 40 and the end face of the push plate 430 in contact with the lower cover plate 7 are both arc-shaped surfaces that fit with the circumferential surface of the lower cover plate 7. During the placement stage, the horizontal section of the support member 433 supports the blade 6. After the blade 6 is placed on the lower cover plate 7, the lower cover plate 7 abuts against the horizontal section of the support member 433 and causes the horizontal section to retract and avoid collision.

[0050] like Figure 1 and Figure 2As shown, the pushing group 43 also includes an outer ring 435. The circumferential surface of the inner ring 40 is provided with two outer rings 435 that are symmetrical about each other and whose axes are collinear with the axis of the inner ring 40 through multiple sliding bars. The two outer rings 435 are fixedly provided with wedge blocks 436 that correspond one-to-one with the sliding column 431, and the multiple wedge blocks 436 are circumferentially distributed.

[0051] Taking the front wedge block 436 as an example, the end face of the front wedge block 436 facing the inner ring 40 is an arc-shaped surface that is inclined from right to left and backward. The end face of the sliding column 431 facing the outer ring 435 is fixedly provided with a mating block 437 that mates with the arc-shaped surface of the wedge block 436. The mating block 437 and the inner ring 40 are jointly fixedly provided with a return spring 438 sleeved on the sliding column 431.

[0052] When working, refer to Figure 4 In the initial state, the length of the horizontal section of the support member 433 penetrating the push plate 430 is greater than the length of the horizontal section located between the push plate 430 and the inner ring 40. At this time, the push plate 430 is far away from the placement area of ​​the lower cover plate 7. After the lower cover plate 7 is placed, all the blades 6 are manually placed between the two magnetic plates 432 in sequence, so that the two magnetic plates 432 are in contact with the corresponding arc surface of the blades 6, and the outer end of the blades 6 is in close contact with the push plate 430. The blades 6 are supported by the horizontal section of the support member 433. At this time, the blades 6 are at a set angle. Then, the outer ring 435 is manually rotated, and the outer ring 435 drives all the wedge blocks 436 on it to rotate synchronously. Through the cooperation between the wedge blocks 436 and the corresponding mating blocks 437, the mating blocks 437 drive the sliding column 431 on them to move in a direction close to the axis of the inner ring 40, and the return spring 438 is compressed and deformed.

[0053] The push plate 430 and the support member 433 drive the blade 6 to gradually approach the lower cover plate 7. The horizontal section of the support member 433 presses against the lower cover plate 7. As the push plate 430 continues to move, the horizontal section of the support member 433 is gradually replaced by the upper surface of the lower cover plate 7, and finally the blade 6 is supported by the lower cover plate 7. The return spring 434 deforms. During this process, through the magnetic attraction and limiting of the magnetic plate 432 and the limiting of the push plate 430, the blade 6 is moved to the lower cover plate 7 in the set state. Finally, the horizontal section of the push plate 430 and the support member 433 are... The magnetic plate 432 is in contact with the lower cover plate 7, which improves the circumferential limiting effect of the lower cover plate 7. It should be noted that the vertical width of the magnetic plate 432 is smaller than that of the blade 6, which avoids the magnetic plate 432 interfering with the blade 6 during the welding process on the upper and lower sides. After the processing is completed, the elastic force generated by the deformation of the second return spring 434 and the third return spring 438 respectively resets the support 433 and the push plate 430. Since the magnetic plate 432 is hinged, it can detach from the welded blade 6 during the reset process.

[0054] like Figure 1 , Figure 2 and Figure 5 As shown, the locking assembly 44 includes push sliders 450. Two push sliders 450 symmetrical about the axis of the inner ring 40 are slidably arranged on the inner ring 40. An operating bar 440 is fixedly arranged on the push slider 450. A pressure spring 441 is fixedly arranged between the operating bar 440 and the adjacent sliding bar. In order to increase the ease of pushing during actual operation, the two push sliders 450 are fixedly connected by a synchronizing member 442 (such as an arc rod). When one push slider 450 is pushed manually, the other push slider 450 will move synchronously.

[0055] like Figure 5 and Figure 7 As shown, a locking hole 443 is provided on the inner ring 40, and a locking pin 444 is slidably provided on the upper surface of the push slider 450. A return spring 445 is fixedly provided between the locking pin 444 and the push slider 450.

[0056] like Figure 1 , Figure 5 and Figure 6 As shown, the locking assembly 44 also includes a guide post 446. A guide post 446 with a vertical axis is fixedly installed on the upper end face of the lower abutment block 4200. A through hole is opened on the upper abutment block 4200. A locking groove 448 is opened circumferentially through the guide post 446. A locking strip 449 is fixedly installed on the push slider 450. After the upper and lower abutment blocks 4200 are closed, the guide post 446 passes through the corresponding through hole. At this time, the locking groove 448 is located above the upper abutment block 4200.

[0057] During operation, after the lower cover plate 7 is placed, the blade 6 needs to be placed. The two push sliders 450 are manually pushed, which drives the operating bar 440 on them to move synchronously. The operating bar 440 applies pressure to the sliding bar through its corresponding pressure spring 441, causing the pressure spring 441 to deform slightly. Then, the outer ring 435 drives the wedge block 436 to start rotating, so that the push plate 430 pushes the blade 6 to the set position on the upper surface of the lower cover plate 7. At this time, the blade 6 is located at the set welding position. After the blade 6 is placed, the sliding bar contacts the corresponding mating block 437, so the outer ring 435 can no longer rotate.

[0058] It should be noted that the return spring 445 is always in a stretched state, and the locking pin 444 always tends to move downward. After the placement of the upper cover plate 5 is completed, the push slider 450 is continuously pushed, the pressure spring 441 is continuously compressed, and the push slider 450 gradually moves. Finally, the locking pin 444 moves to be opposite to the corresponding locking hole 443. The elastic force generated by the deformation of the return spring 445 causes the locking pin 444 to be locked into the locking hole 443, so that the positions of the push slider 450 and the operating bar 440 are fixed.

[0059] When the upper abutment block 4200 moves down to press against the upper cover plate 5, the guide post 446 passes through the through hole, and at this time the locking groove 448 is located above the upper abutment block 4200.

[0060] During the process of gradually moving the slider 450, the slider 450 causes the locking strip 449 on it to engage in the corresponding locking groove 448, locking the upper abutment block 4200. This results in the upper cover plate 5, blade 6 and lower cover plate 7 being rigidly locked together in the vertical direction. At the same time, the locking operation strip 440 causes the wedge block 436 and outer ring 435 to be elastically locked, so that the blade 6 is clamped and locked during the welding process for welding processing.

[0061] After welding is completed, the locking pin 444 is pulled upward manually to push the slider 450 to reset, releasing the locks of the upper abutment block 4200 and the wedge block 436, thereby resetting all structures and allowing the finished parts to be removed manually.

[0062] like Figure 1 and Figure 2 As shown, the locking part includes a U-shaped locking block 46. A U-shaped locking block 46 with a U-shaped opening facing forward is slidably disposed on the moving base. The U-shaped area of ​​the U-shaped locking block 46 fits with two outer rings 435. The U-shaped locking block 46 is driven to move back and forth by an external electric push rod (not shown in the figure).

[0063] During the placement of the components, the external electric push rod moves the U-shaped locking block 46 forward, and the outer ring 435 engages within the U-shaped area of ​​the U-shaped locking block 46, ensuring that the outer ring 435 and the inner ring 40 are in a horizontal state. This facilitates the placement of the upper cover plate 5, the blade 6, and the lower cover plate 7, serving as a reference for subsequent horizontal welding. During subsequent welding, the forward movement of the U-shaped locking block 46 cooperates with the outer ring 435, ensuring that the upper cover plate 5, the blade 6, and the lower cover plate 7 remain horizontal throughout the welding process. This allows the laser welding equipment to weld along the set path (a welding path defined by the blade shape), ensuring accurate welding path and preventing deviations in the designed welding path from the set welding path due to unevenness of the upper cover plate 5, the blade 6, and the lower cover plate 7, which could affect welding accuracy.

[0064] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0065] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0067] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A tooling fixture for machining centrifugal pump parts, mounted on a movable base of a laser welding equipment, characterized in that, include: The worktable is provided on the front side of the movable seat. Two opposing seats are fixedly arranged on the worktable, and a rotating shaft is rotatably provided on the opposite surface of the two opposing seats. A clamping mechanism is provided between the two rotating shafts. The clamping mechanism includes an inner ring, and the inner ring is fixedly sleeved on both rotating shafts. Rotating blocks are fixedly installed on the opposite surfaces of the two rotating shafts. A support part is provided between the two rotating blocks. The support part supports the lower cover plate and presses the upper cover plate and the blade tightly onto the lower cover plate. The support part includes a support assembly. Two symmetrical support assemblies are provided on the opposite sides of the two rotating blocks. The support assembly includes a pressing block and a fixing block. The upper fixing block is used to press down the upper cover plate and the lower fixing block is used to support the lower cover plate. The clamping mechanism also includes a pushing group, on which the inner ring is provided for pushing the blade to the space between the upper and lower cover plates in a set state. The pushing group includes multiple pushing plates that slide radially along the inner ring. The inner ring is equipped with a locking group for locking the upper and lower cover plates and for driving the push group to push. The movable base is equipped with a locking part for locking the angle of the inner ring; The pushing group also includes sliding columns. Multiple circumferentially evenly distributed sliding columns slide through the inner ring radially. The pushing plate is fixedly set on the sliding columns. Two magnetic suction plates are hinged to the end face of the pushing plate facing the inner ring axis. The two magnetic suction plates have the same curvature as the two arc surfaces of the same blade. The blade is placed by the two magnetic suction plates holding the blade and making the outer side of the blade press against the pushing plate, so that the blade is in the desired state. An L-shaped support is slidably sleeved on the sliding column. The horizontal section of the support penetrates the push plate along the axial direction of the sliding column, and a return spring is fixedly installed between the vertical section of the support and the push plate.

2. The tooling fixture for machining centrifugal pump accessories according to claim 1, characterized in that: The two rotating blocks facing each other on the left and right have sliding grooves. A sliding block is slidably disposed in the sliding groove. The abutting block in the upper support assembly is fixedly disposed on the sliding block. A return spring is fixedly disposed between the sliding block and the inner wall of the sliding groove. The abutting block in the lower support assembly is fixedly disposed on the rotating block.

3. The tooling fixture for machining centrifugal pump accessories according to claim 2, characterized in that: The lower end of the side wall of the upper abutment block facing the inner ring axis is chamfered, and the side wall of the abutment block facing the inner ring axis is an arc-shaped surface that fits against the circumferential surface of the upper or lower cover plate.

4. The tooling fixture for machining centrifugal pump accessories according to claim 1, characterized in that: The end face of the horizontal section of the support component near the inner ring axis and the end face of the push plate that contacts the lower cover plate are both arc-shaped surfaces that fit against the circumferential surface of the lower cover plate.

5. A tooling fixture for machining centrifugal pump accessories according to claim 4, characterized in that: The pushing group also includes an outer ring. The circumferential surface of the inner ring is provided with two outer rings that are symmetrical about each other and whose axes are collinear with the axis of the inner ring through multiple sliding bars. A wedge block corresponding to the sliding column is fixedly provided between the two outer rings, and the multiple wedge blocks are circumferentially distributed. The end face of the wedge block facing the inner ring is an arc-shaped surface that deflects backward from right to left. The end face of the sliding column facing the outer ring is fixedly provided with a mating block that mates with the arc-shaped surface of the wedge block. A reset spring three sleeved on the sliding column is fixedly provided between the mating block and the inner ring.

6. The tooling fixture for machining centrifugal pump accessories according to claim 5, characterized in that: The locking assembly includes push sliders, with two push sliders slidably disposed on the inner ring. An operating bar is fixedly disposed on the push slider, and a pressure spring is fixedly disposed between the operating bar and the adjacent sliding bar.

7. A tooling fixture for machining centrifugal pump accessories according to claim 6, characterized in that: A locking hole is provided on the inner ring, and a locking pin is provided on the upper surface of the push slider to slide up and down. A return spring is fixedly provided between the locking pin and the push slider.

8. A tooling fixture for machining centrifugal pump accessories according to claim 7, characterized in that: The locking assembly also includes a guide post. A guide post with a vertical axis is fixedly installed on the upper end face of the lower abutment block. A through hole is opened on the upper abutment block. A locking groove is opened circumferentially through the guide post. A locking strip is fixedly installed on the push slider.

9. A tooling fixture for machining centrifugal pump accessories according to claim 5, characterized in that: The locking part includes a U-shaped locking block. A U-shaped locking block with a U-shaped opening facing forward is slidably disposed on the moving base. The U-shaped area of ​​the U-shaped locking block fits into the two outer rings.

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