CN112276436A

CN112276436A - Volute welding tool

Info

Publication number: CN112276436A
Application number: CN201910659050.3A
Authority: CN
Inventors: 仲进; 茅一飞
Original assignee: Jiangsu Gaomingkefei Automation Equipment Co ltd
Current assignee: Jiangsu Gaomingkefei Automation Equipment Co ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2021-01-29

Abstract

The invention relates to a volute welding tool, which comprises a bottom plate, wherein a transfer device for linear displacement, a positioning device for installing and positioning a volute, a clamping limiting device for fixing the volute and a bypass valve inside the volute, and an angle clamping adjusting device for adjusting the inclination angle of the volute are respectively arranged on the bottom plate; the invention can realize accurate and reliable positioning and clamping of the volute, improves the precision and the replaceability of parts, can realize welding positioning of the volute after the invention is used, avoids low welding quality of the volute, effectively reduces the process defect and improves the welding speed because the volute is positioned at the best welding position after being installed. The invention also replaces the actions of positioning, clamping and overturning during the manual assembly of parts, reduces the labor intensity of workers, has high automation degree and greatly improves the production efficiency.

Description

Volute welding tool

Technical Field

The invention relates to the field of welding tools, in particular to a volute welding tool.

Background

At present, in the field of volute production, the volute is welded through manual assembly to perform positioning, clamping, overturning and other operations, the manual assembly positioning mode not only improves the labor intensity of workers, but also cannot conveniently and quickly realize the welding positioning of the volute, so that the welding quality of the volute is more problematic, the volute cannot be positioned at an optimal welding station when being welded, the process defects are greatly improved, and the welding speed is seriously reduced.

Disclosure of Invention

The applicant aims at the existing problems, researches and improves the existing problems, and provides a volute welding tool which can realize accurate positioning during volute welding, is time-saving and labor-saving, and greatly reduces the labor intensity of workers.

The technical scheme adopted by the invention is as follows:

the volute welding tool comprises a bottom plate, wherein a transfer device for linear displacement, a positioning device for mounting and positioning the volute, a clamping limiting device for fixing the volute and a bypass valve inside the volute and an angle clamping adjusting device for adjusting the inclination angle of the volute are respectively arranged on the bottom plate;

the specific structure of the transfer device is as follows:

the device comprises a pneumatic device for guiding a first piston rod to perform linear reciprocating motion, wherein the first piston rod is positioned at the output end of the pneumatic device and is matched with one end of a connecting plate, the other end of the connecting plate penetrates through a bottom plate and is fixedly connected with a movable plate, and the movable plate performs linear reciprocating motion relative to the bottom plate through a pair of linear guide rails;

the specific structure of the positioning device is as follows:

the positioning device comprises a transverse fixing plate, a pair of first vertical fixing plates, a mounting seat fixing plate, a mounting seat, a pair of mounting blocks and a positioning rod, wherein the transverse fixing plate is fixedly connected to the surface of a bottom plate, the surface of the transverse fixing plate is fixedly connected with the mounting seat fixing plate through the pair of first vertical fixing plates, the mounting seat is fixedly connected to the mounting seat fixing plate, the pair of mounting blocks are distributed at the end part of the mounting seat at intervals, a first pin hole and a second pin hole are respectively formed in each mounting block, the positioning rod is connected to the adjacent first pin hole through a rotating pin, and a limiting pin used for limiting the over-stroke of the rotation of the positioning;

the clamping and limiting device has the following specific structure:

the second vertical mounting plate is fixedly connected to the surface of a movable plate in the transfer device, a bypass valve limiting device used for limiting a bypass valve inside the volute is also arranged on the surface of the movable plate, and the second vertical mounting plate is also provided with a bypass valve jacking device used for jacking the bypass valve inside the volute and a plurality of volute end face fixing devices used for three-point pressurizing and fixing the end face of the volute;

the angle clamping adjusting device has the following specific structure:

including regulation seat, second adjusting nut, locating pin, briquetting and the adjusting cylinder that has the inclined plane, adjust the seat and be close to positioner and rigid coupling in bottom plate surface set up the screw hole that supplies the second adjusting nut spiro union on the inclined plane, the adjusting cylinder is installed at the back of adjusting the seat, and the piston of adjusting cylinder runs through the inclined plane and connects the briquetting cooperation locating pin on the briquetting.

The method is further technically characterized in that:

the bypass valve limiting device comprises a lifting cylinder, a lifting plate, a plurality of guide posts, a first spring and a bypass valve limiting block, wherein the lifting cylinder is fixed on the surface of a movable plate in the transfer device, a piston of the lifting cylinder is connected with the lifting plate, one end of each guide post with a screw hole is matched with the movable plate, the other end of each guide post with the screw hole penetrates through the lifting plate and is fixed with the same guide post fixing plate through a fastener, a first reset spring is matched with the periphery of each guide post with threads, a notch is formed in each guide post fixing plate, the surface of the lifting plate along the notch is also fixed with one end of the bypass valve limiting block, the other end of the bypass valve limiting block extends out of a special-shaped through hole, and the head of the limiting block is also in pin joint with the;

the bypass valve jacking device comprises a jacking cylinder mounting plate fixedly connected to the back side of the second vertical mounting plate, a jacking cylinder is mounted on the jacking cylinder mounting plate, a piston of the jacking cylinder is connected with one end of a jacking rod, and the other end of the jacking rod penetrates through the second vertical mounting plate;

the volute end face fixing device comprises a fixing column mounting sleeve matched with the second vertical mounting plate, a second reset spring is arranged inside the fixing column mounting sleeve, and one end of the end face fixing column extends into the fixing column mounting sleeve and is abutted against the second reset spring;

the damping device is positioned between the pair of linear guide rails; the vibration reduction device comprises a vibration reduction block mounting seat and a vibration reduction block, the vibration reduction block mounting seat is fixed on the surface of the bottom plate, and the vibration reduction block is fixedly connected to one side of the vibration reduction block mounting seat;

the volute welding tool is characterized in that the left end and the right end of one side of the movable plate are fixedly connected with a buffer block, the bottom plate is fixedly connected with a pair of buffer mounting plates, each buffer mounting plate is positioned on the outer side of the linear guide rail, and each buffer mounting plate is fixedly connected with a buffer for butt joint with the buffer block;

the first rocker arm adjusting device and the second rocker arm adjusting device are used for adjusting the angle of the rocker arm relative to the volute;

the first rocker arm adjusting device comprises a pen-shaped air cylinder, an air cylinder fixing block, a second piston rod, a first adjusting nut and an adjusting head, the pen-shaped air cylinder is installed on the air cylinder fixing block, the air cylinder fixing block is fixedly connected to the top of the second vertical installation plate, and the adjusting head and the first adjusting nut used for adjusting the position of the adjusting head are installed at the end part of the piston rod of the pen-shaped air cylinder;

the second rocker arm adjusting device comprises a single-action cylinder mounting plate, a single-action cylinder, a piston connecting plate, a transition plate and an L-shaped adjusting block, the single-action cylinder mounting plate is fixedly connected with the tops of the pair of first vertical fixing plates, the single-action cylinder is fixed on the single-action cylinder mounting plate, and a piston of the single-action cylinder is fixedly connected with the L-shaped adjusting block through the piston connecting plate and the transition plate;

the volute welding tool further comprises a base body fixedly connected to the bottom plate, a rocker arm mounting block is fixedly connected to the top of the base body, an assembling open slot is formed in the rocker arm mounting block, and an assembling flange used for being matched with a rocker arm is arranged in the assembling open slot.

The invention has the following beneficial effects:

the spiral case positioning device is simple in structure and convenient to use, the angle clamping adjusting device is arranged to position the spiral case surface, the bypass valve in the spiral case is fixed in a point fixing mode, the bypass valve is limited and fixed by one pin on two sides relative to the spiral case through the bypass valve limiting device and the bypass valve jacking device, and the end surface of the spiral case is flexibly abutted by the fixing column with the reset spring, so that the interaction force between the spiral case and the clamping limiting device is stable, and the spiral case is not easily damaged.

The invention can realize accurate and reliable positioning and clamping of the volute, improves the precision and the replaceability of parts, can realize welding positioning of the volute after the invention is used, avoids low welding quality of the volute, effectively reduces the process defect and improves the welding speed because the volute is positioned at the best welding position after being installed. The invention also replaces the actions of positioning, clamping and overturning during the manual assembly of parts, reduces the labor intensity of workers, has high automation degree and greatly improves the production efficiency.

Drawings

Fig. 1 is a schematic structural diagram i of the present invention in an operating state.

Fig. 2 is a schematic structural diagram ii of the present invention in an operating state.

FIG. 3 is a schematic view of the present invention with the volute in an unclamped position.

FIG. 4 is a partial schematic view of the present invention.

FIG. 5 is a partial schematic view II of the present invention.

FIG. 6 is a schematic view of the connection between the volute and the bypass valve according to the present invention.

Fig. 7 is a schematic sectional structure view at a-a of fig. 6.

Fig. 8 is a schematic structural view of a positioning mechanism of the present invention.

Fig. 9 is a partial structural schematic view of the positioning mechanism.

FIG. 10 is a schematic view of the bypass valve of the present invention with no bypass valve connected to the volute.

FIG. 11 is a schematic view of the bypass valve with volute connected according to the present invention.

FIG. 12 is a schematic view of the construction of the by-pass valve of the present invention.

Wherein: 1. a base plate; 2. a transfer device; 201. a transferring cylinder; 202. a first piston rod; 203. a connecting plate; 2031. a piston rod assembly hole; 204. a guide rail; 205. a slider; 206. a movable plate; 3. a vibration damping device; 301. a damping block mounting base; 302. a vibration damping block; 401. a buffer block; 402. a buffer; 403. a bumper mounting plate; 5. a positioning device; 501. a transverse fixing plate; 502. a first vertical fixing plate; 503. a mounting seat fixing plate; 504. a mounting seat; 505. mounting blocks; 506. a first pin hole; 507. a second pin hole; 508. spacing; 509. positioning a rod; 510. a spacing pin; 6. clamping a limiting device; 601. a second vertical mounting plate; 6012. a special-shaped through hole; 602. a reinforcing plate; 603. a bypass valve limiting device; 6031. a lifting cylinder; 6032. a lifting plate; 6033. a guide post; 6034. a spring limit nut; 6035. a first return spring; 6036. a guide post fixing plate; 6037. a bypass valve limiting block; 6038. a bypass valve limit pin; 604. a bypass valve tightening device; 6041. tightly pushing the air cylinder; 6042. a piston rod guide flange; 6043. a tightening rod; 6044. tightly pushing the cylinder mounting plate; 605. a volute end face fixing device; 6051. a fixed column mounting sleeve; 6052. end face fixing columns; 701. a first rocker arm adjustment device; 7011. a pen-shaped cylinder; 7012. a cylinder fixing block; 7013. a second piston rod; 7014. a first adjusting nut; 7015. an adjustment head; 702. a second rocker arm adjustment device; 7021. a single-acting cylinder mounting plate; 7022. a single-acting cylinder; 7023. a piston connecting plate; 7024. a transition plate; 7025. an L-shaped adjustment block; 8. an angle clamping adjustment device; 801. an adjusting seat; 802. an inclined surface; 803. a second adjusting nut; 804. positioning pins; 805. briquetting; 806. an adjusting cylinder; 9. a rocker arm; 10. a bypass valve; 1001. a boss assembly hole; 1002. a pillar portion; 1101. a base body; 1102. a rocker arm mounting block; 1103. assembling the flange; 1104. assembling an open slot; 12. a volute; 1201. a bypass valve column portion mounting hole; 1202. the hole end of the bypass valve is provided with a boss.

Detailed Description

The following describes specific embodiments of the present invention.

As shown in fig. 1, 2 and 3, the volute welding fixture includes a bottom plate 1, and a transfer device 2 for performing linear displacement, a positioning device 5 for mounting and positioning the volute 12, a clamping limiting device 6 for fixing the volute 12 and the bypass valve 10 inside the volute 12, and an angle clamping adjusting device 8 for adjusting an inclination angle of the volute 12 are respectively disposed on the bottom plate 1.

As shown in fig. 1, 2, and 3, the transfer device 2 has the following specific structure:

the first piston rod 202 is located at the output end of the transfer cylinder 201, the first piston rod 202 is matched with one end of a connecting plate 203, a piston rod assembling hole 2031 is formed in the connecting plate 203, the other end of the connecting plate 203 penetrates through a bottom plate 1 and is fixedly connected with a movable plate 206, and the movable plate 206 makes linear reciprocating motion relative to the bottom plate 1 through a pair of linear guide rails. As shown in fig. 2, the linear guide includes a pair of guide rails 204 fixed on the upper surface of the base plate 1, a sliding block 205 is connected on each guide rail 204, each sliding block 205 is connected with the bottom of the movable plate 206, and an opening for penetrating the connecting plate 203 is further opened on the base plate 1.

As shown in fig. 8 and 9, the positioning device 5 has the following specific structure:

the positioning device comprises a transverse fixing plate 501, a pair of first vertical fixing plates 502, a mounting seat fixing plate 503, a mounting seat 504, a pair of mounting blocks 505 and a positioning rod 509, wherein the transverse fixing plate 501 is fixedly connected to the surface of a bottom plate 1, the surface of the transverse fixing plate 501 is fixedly connected to the mounting seat fixing plate 503 through the pair of first vertical fixing plates 502, the mounting seat 504 is fixedly connected to the mounting seat fixing plate 503, the pair of mounting blocks 505 are distributed at the end part of the mounting seat 504 at intervals, a space 508 is formed between every two adjacent mounting blocks 505, a first pin hole 506 and a second pin hole 507 are respectively formed in each mounting block 505, the positioning rod 509 is connected to the adjacent first pin hole 506 through a rotating pin, a limiting pin 510 used for limiting the rotation overtravel of the positioning rod 509 is further matched between the adjacent second pin holes 507, and.

As shown in fig. 4 and 5, the specific structure of the clamping and limiting device 6 is as follows:

including the second vertical mounting panel 601 of seting up special-shaped perforating hole 6012, the gusset plate 602 is fixed firmly respectively on both sides about the inboard of second vertical mounting panel 601, second vertical mounting panel 601 rigid coupling is in moving the surface of carrying movable plate 206 in device 2 for carry out spacing bypass valve stop device 603 also to setting up in the surface of movable plate 206 to the inside bypass valve 10 of spiral case 12, still set up on second vertical mounting panel 601 and be used for the spiral case terminal surface fixing device 605 to the fixed three-point pressurization of spiral case 12 terminal surface bypass valve top tight device 604 and a plurality of being used for to the inside bypass valve 10 top tight of spiral case 12.

As shown in fig. 4 and 5, the bypass valve stopper 603 includes a lifting cylinder 6031, a lifting plate 6032, a plurality of guide posts 6033, a first return spring 6035 and a bypass valve stopper 6037, the lifting cylinder 6031 is fixed on the surface of the movable plate 206 in the transfer device 2, a piston of the lifting cylinder 6031 is connected to the lifting plate 6032, one ends of the guide posts 6033 with screw holes are all matched with the movable plate 206, the other ends of the guide posts 6033 with screw holes penetrate through the lifting plate 6032 and are fixed to the same guide post fixing plate 6036 through fasteners, the first return spring 6035 is matched with the periphery of each guide post 6033 with screw threads, a spring stopper nut 6034 is further matched with the guide post 6033, and the compression amount of the guide post 6033 can be adjusted by adjusting the position of the spring stopper nut 6034 on the guide post 6033. The guide post fixing plate 6036 is provided with a notch, the surface of the lifting plate 6032 along the notch is fixed with one end of a bypass valve limiting block 6037, the other end of the bypass valve limiting block 6037 extends out of the special-shaped through hole 6012, the head of the bypass valve limiting block 6037 is further in pin connection with a bypass valve limiting pin 6038, the bypass valve 10 is in contact through the bypass valve limiting pin 6038, and therefore the bypass valve 10 is abutted to prevent the bypass valve 10 from moving.

As shown in fig. 4 and 5, the bypass valve tightening device 604 includes a tightening cylinder mounting plate 6044 fixedly connected to the back side of the second vertical mounting plate 601, a tightening cylinder 6041 is mounted on the tightening cylinder mounting plate 6044, a piston of the tightening cylinder 6041 is connected to one end of a tightening rod 6043, and the other end of the tightening rod 6043 penetrates through the second vertical mounting plate 601. The other side of the second vertical mounting plate 601 is also fixedly connected with a piston rod guide flange 6042, and the Bo A positive tightening rod 6043 has the stability of extending in and out.

As shown in fig. 4 and 5, the volute end-face fixing device 605 includes a fixed column mounting sleeve 6051 engaged with the second vertical mounting plate 601, a second return spring is disposed inside the fixed column mounting sleeve 6051, and one end of the end-face fixed column 6052 extends into the fixed column mounting sleeve 6051 and abuts against the second return spring.

As shown in fig. 2, the specific structure of the angle clamping adjustment device 8 is as follows:

the adjusting device comprises an adjusting seat 801 with an inclined surface 802, a second adjusting nut 803, a positioning pin 804, a pressing block 805 and an adjusting cylinder 806, wherein the adjusting seat 801 is close to the positioning device 5 and is fixedly connected to the surface of the bottom plate 1, a threaded hole for screwing the second adjusting nut 803 is formed in the inclined surface 802, the adjusting cylinder 806 is installed on the back surface of the adjusting seat 801, a piston of the adjusting cylinder 806 penetrates through the inclined surface 802 and is connected with the pressing block 805, and the positioning pin 804 is matched with the pressing block 805.

As shown in fig. 2, the present invention further includes a damping device 3, the damping device 3 being located between the pair of linear guides; the vibration damping device 3 comprises a vibration damping block mounting seat 301 and a vibration damping block 302, the vibration damping block mounting seat 301 is fixed on the surface of the bottom plate 1, the vibration damping block 302 is fixedly connected to one side of the vibration damping block mounting seat 301, and the arrangement of the vibration damping block 302 is used for avoiding overtravel and effectively buffering the movable plate 206 when the movable plate is linearly displaced.

As shown in fig. 1, a buffer block 401 is fixedly connected to both left and right ends of one side of the movable plate 206, a pair of buffer mounting plates 403 is further fixedly connected to the base plate 1, each buffer mounting plate 403 is located outside the linear guide, and a buffer 402 for abutting against the buffer block 401 is further fixedly connected to each buffer mounting plate 403.

As shown in fig. 1-3, the present invention further includes a first rocker arm adjustment device 701 and a second rocker arm adjustment device 702 for adjusting the angle of the rocker arm 9 relative to the volute 12.

As shown in fig. 2, the first rocker arm adjusting device 701 includes a pen-shaped air cylinder 7011, an air cylinder fixing block 7012, a second piston rod 7013, a first adjusting nut 7014 and an adjusting head 7015, the pen-shaped air cylinder 7011 is mounted on the air cylinder fixing block 7012, the air cylinder fixing block 7012 is fixedly connected to the top of the second vertical mounting plate 601, and an adjusting head 7015 and a first adjusting nut 7014 for adjusting the position of the adjusting head 7015 are mounted at the end of the piston rod of the pen-shaped air cylinder 7011.

As shown in fig. 2, the second rocker arm adjusting device 702 includes a single-acting cylinder mounting plate 7021, a single-acting cylinder 7022, a piston connecting plate 7023, a transition plate 7024, and an L-shaped adjusting block 7025, the single-acting cylinder mounting plate 7021 is fixedly connected to the tops of the pair of first vertical fixing plates 502, the single-acting cylinder 7022 is fixed to the single-acting cylinder mounting plate 7021, and a piston of the single-acting cylinder 7022 is fixedly connected to the L-shaped adjusting block 7025 through the piston connecting plate 7023 and the transition plate 7024.

As shown in fig. 2, the present invention further includes a base 1101 fixedly connected to the base plate 1, a rocker arm mounting block 1102 is fixedly connected to the top of the base 1101, an assembling opening slot 1104 is formed in the rocker arm mounting block 1102, and an assembling flange 1103 for engaging with the rocker arm 9 is disposed in the assembling opening slot 1104.

The specific working process of the invention is as follows:

as shown in fig. 6, 7, 10, 11 and 12, a bypass valve post fitting hole 1201 and a bypass valve hole end fitting boss 1202 are provided in the casing of the scroll casing 12, a post 1002 is provided at one end of the bypass valve 10, a boss fitting hole 1001 is provided at the other end, the post 1002 of the bypass valve 10 is fitted to the bypass valve post fitting hole 1201 before fitting, the bypass valve hole end fitting boss 1202 is fitted to the boss fitting hole 1001, and as shown in fig. 7, the hole end of the rocker arm 9 is fitted to the post 1002 of the bypass valve 10 extending out of the scroll casing 12.

The specific working process of the invention is as follows:

as shown in fig. 1 to 3, firstly, a square base portion of the volute 12 abuts against an inclined surface 802 of an adjusting seat 801 in the angle clamping adjusting device 8, one end of the volute 12 abuts against a surface of an installing seat fixing plate 503 in the positioning device 5 by adjusting the position of the volute 12, meanwhile, the installing seat 504, the installing block 505 and the positioning rod 509 all extend into the volute 12, after the position adjustment is completed, the adjusting cylinder 806 starts and drives the pressing block 805 to gradually approach the square base of the worm 12 until the pressing block 805 abuts against the square base, meanwhile, the positioning pin 804 on the pressing block 805 also extends into a pin hole of the square base, before the pressing block 805 is pressed down, the second adjusting nut 803 is rotated to adjust the inclination angle of the volute 12, and after the pressing block 805 presses the square base of the volute 12 to meet the requirement.

As shown in fig. 1 to 3, after the volute 12 is positioned, the transfer cylinder 201 is started, the first piston rod 202 of the transfer cylinder 201 extends out and drives the connecting plate 203 to follow up, because the connecting plate 203 is fixedly connected to the movable plate 206, and the movable plate 206 is slidably connected to the guide rail 204 through the slider 205, so that the clamping and limiting device 6 on the movable plate 206 and the movable plate 206 performs reciprocating linear motion, when the clamping and limiting device 6 moves to the other side close to the volute 12, the bypass valve limiting block 6037 in the bypass valve limiting device 603 has already extended into the volute 12 and moved to the bypass valve 10, during the moving process, the end face fixing column 6052 is forced to abut against the end face of the volute 12, and the second return spring in the fixing column mounting sleeve 6051 is deformed and compressed, and simultaneously applies force to make each end face fixing column 6052 always. Meanwhile, as shown in fig. 4 and 5, the lifting cylinder 6031 drives the lifting plate 6032 to ascend along each guide column 6033 while abutting, until the bypass valve limit pin 6038 on the bypass valve limit block 6037 abuts against the end of the bypass valve 10 with the boss assembling hole 1001, and meanwhile, the jacking cylinder 6041 in the bypass valve jacking device 604 is started, drives the jacking rod 6043 to start and abut against the bypass valve hole end assembling boss 1202 inside the volute 12, so that the limit of the bypass valve 10 is realized.

As shown in fig. 2, when the bypass valve is finally tested, the first rocker arm adjusting device 701 and the second rocker arm adjusting device 702 are used for adjusting, the pen-shaped air cylinder 7011 of the first rocker arm adjusting device 701 is started and drives the adjusting head 7015 on the second piston rod 7013 to contact the rocker arm 9, so that the rocker arm 9 rotates relative to the column portion 1002. Similarly, the second rocker arm adjusting device 702 also drives the piston connecting plate 7023, the transition plate 7024 and the L-shaped adjusting block 7025 to adjust the position of the rocker arm 9 in the opposite direction through the single-acting cylinder 7022, and the inside of the bypass valve 10 can be opened or closed by adjusting the angle of the rocker arm 9, so that the air flow sealing or air flow follow-up of the bypass valve 10 is ensured, and the test and use are facilitated.

The swing arm 9 can be taken out from the assembly opening groove 1104 of the housing 1101 by a manipulator and then assembled to the volute 12.

The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, the scope of the invention being defined by the appended claims, which may be modified in any manner without departing from the basic structure thereof.

Claims

1. Spiral case welding frock, including bottom plate (1), its characterized in that: a shifting device (2) for making linear displacement, a positioning device (5) for installing and positioning the volute (12), a clamping limiting device (6) for fixing the volute (12) and a bypass valve (10) inside the volute (12) and an angle clamping adjusting device (8) for adjusting the inclination angle of the volute (12) are respectively arranged on the bottom plate (1);

the specific structure of the transfer device is as follows:

the device comprises a pneumatic device for guiding a first piston rod (202) to perform linear reciprocating motion, wherein the first piston rod (202) is positioned at the output end of the pneumatic device, the first piston rod (202) is matched with one end of a connecting plate (203), the other end of the connecting plate (203) penetrates through a bottom plate (1) and is fixedly connected with a movable plate (206), and the movable plate (206) performs linear reciprocating motion relative to the bottom plate (1) through a pair of linear guide rails;

the positioning device (5) has the following specific structure:

the positioning device comprises a transverse fixing plate (501), a pair of first vertical fixing plates (502), a mounting seat fixing plate (503), a mounting seat (504), a pair of mounting blocks (505) and a positioning rod (509), wherein the transverse fixing plate (501) is fixedly connected to the surface of a base plate (1), the surface of the transverse fixing plate (501) is fixedly connected to the mounting seat fixing plate (503) through the pair of first vertical fixing plates (502), the mounting seat (504) is fixedly connected to the mounting seat fixing plate (503), the pair of mounting blocks (505) are distributed at the end part of the mounting seat (504) at intervals, a first pin hole (506) and a second pin hole (507) are respectively formed in each mounting block (505), the positioning rod (509) is connected to the adjacent first pin holes (506) through a rotating pin, and a limiting pin (510) used for limiting the over-stroke of the positioning rod (509) in a rotating;

the clamping and limiting device (6) has the following specific structure:

the device comprises a second vertical mounting plate (601) provided with a special-shaped through hole (6012), wherein the second vertical mounting plate (601) is fixedly connected to the surface of a movable plate (206) in a transfer device, a bypass valve limiting device (603) used for limiting a bypass valve (10) inside a volute (12) is also arranged on the surface of the movable plate (206), and the second vertical mounting plate (601) is further provided with a bypass valve tightening device (604) used for tightening the bypass valve (10) inside the volute (12) and a plurality of volute end face fixing devices (605) used for three-point pressurizing and fixing the end face of the volute (12);

the angle clamping adjusting device (8) has the following specific structure:

the adjusting device comprises an adjusting seat (801) with an inclined surface (802), a second adjusting nut (803), a positioning pin (804), a pressing block (805) and an adjusting cylinder (806), wherein the adjusting seat (801) is close to a positioning device (5) and is fixedly connected to the surface of a bottom plate (1), a threaded hole for the second adjusting nut (803) to be screwed is formed in the inclined surface (802), the adjusting cylinder (806) is installed on the back surface of the adjusting seat (801), a piston of the adjusting cylinder (806) penetrates through the inclined surface (802) and is connected with the pressing block (805), and the pressing block (805) is matched with the positioning pin (804).

2. The volute welding tool of claim 1, wherein: the bypass valve limiting device (603) comprises a lifting cylinder (6031), a lifting plate (6032), a plurality of guide columns (6033), a first spring (6035) and a bypass valve limiting block (6037), wherein the lifting cylinder (6031) is fixed on the surface of a movable plate (206) in the transfer device, a piston of the lifting cylinder (6031) is connected with the lifting plate (6032), one ends of the guide columns (6033) with screw holes are matched with the movable plate (206), the other ends of the guide columns (6033) with screw holes penetrate through the lifting plate (6032) and are fixed with the same guide column fixing plate (6036) through fasteners, the first reset spring (6035) is matched with the periphery of each guide column (6033) with screw threads, notches are formed in the guide column fixing plate (6036), the notches are formed in the surface of the lifting plate (6032) and are fixed with one end of the bypass valve limiting block (6037), and the other ends of the limiting block (6037) extend out of a special-shaped through hole (6012), the head of the bypass valve limiting block (6037) is also in pin joint with a bypass valve limiting block (6038).

3. The volute welding tool of claim 1, wherein: bypass valve top tight device (604) include rigid coupling in the tight cylinder mounting panel in the dorsal top of second vertical mounting panel (601) (6044), top tight cylinder (6041) install in on the tight cylinder mounting panel in top (6044), the piston of the tight cylinder in top (6041) is connected with the one end of tight pole in top (6043), the other end of tight pole in top (6043) runs through second vertical mounting panel (601).

4. The volute welding tool of claim 1, wherein: the volute end face fixing device (605) comprises a fixing column mounting sleeve (6051) matched with the second vertical mounting plate (601), a second reset spring is arranged inside the fixing column mounting sleeve (6051), and one end of an end face fixing column (6052) extends into the fixing column mounting sleeve (6051) and is abutted to the second reset spring.

5. The volute welding tool according to any one of claims 1-4, wherein: the damping device (3) is positioned between the pair of linear guide rails; the vibration reduction device (3) comprises a vibration reduction block mounting seat (301) and a vibration reduction block (302), wherein the vibration reduction block mounting seat (301) is fixed on the surface of the bottom plate (1), and the vibration reduction block (302) is fixedly connected to one side of the vibration reduction block mounting seat (301).

6. The volute welding tool according to any one of claims 1-4, wherein: spiral case welding frock, its characterized in that: the left end and the right end of one side of the movable plate (206) are fixedly connected with a buffer block (401), the bottom plate (1) is further fixedly connected with a pair of buffer mounting plates (403), each buffer mounting plate (403) is located on the outer side of the linear guide rail, and each buffer mounting plate (403) is further fixedly connected with a buffer (402) which is used for being in butt joint with the buffer block (401).

7. The volute welding tool according to any one of claims 1-4, wherein: spiral case welding frock, its characterized in that: the device also comprises a first rocker arm adjusting device (701) and a second rocker arm adjusting device (702) which are used for adjusting the angle of the rocker arm (9) relative to the volute (12).

8. The volute welding tool of claim 8, wherein:

the first rocker arm adjusting device (701) comprises a pen-shaped air cylinder (7011), an air cylinder fixing block (7012), a second piston rod (7013), a first adjusting nut (7014) and an adjusting head (7015), the pen-shaped air cylinder (7011) is installed on the air cylinder fixing block (7012), the air cylinder fixing block (7012) is fixedly connected to the top of the second vertical installation plate (601), the adjusting head (7015) and the first adjusting nut (7014) used for adjusting the position of the adjusting head (7015) are installed at the end portion of the piston rod of the pen-shaped air cylinder (7011).

9. The volute welding tool of claim 8, wherein: the second rocker arm adjusting device (702) comprises a single-acting cylinder mounting plate (7021), a single-acting cylinder (7022), a piston connecting plate (7023), a transition plate (7024) and an L-shaped adjusting block (7025), the single-acting cylinder mounting plate (7021) is fixedly connected with the tops of a pair of first vertical fixing plates (502), the single-acting cylinder (7022) is fixed on the single-acting cylinder mounting plate (7021), and a piston of the single-acting cylinder (7022) is fixedly connected with the L-shaped adjusting block (7025) through the piston connecting plate (7023) and the transition plate (7024).

10. The volute welding tool according to any one of claims 1-4, wherein the volute welding tool comprises: still include pedestal (1101) of rigid coupling in bottom plate (1) the top rigid coupling rocking arm installation piece (1102) of pedestal (1101) set up assembly open slot (1104) on rocking arm installation piece (1102), in set up assembly flange (1103) that are used for cooperating rocking arm (9) in assembly open slot (1104).