Marine engine piping system welding positioning and fixing tool
By designing a multi-degree of freedom welding positioning tooling, the problem of position degree and angle tolerance requirements in marine engine pipe system welding is solved, and the precise butt welding of bent pipes and reducer pipes is achieved, which improves the welding quality and aesthetics.
Patent Information
- Application Number
- CN202421691569.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-07-17
AI Technical Summary
The prior art cannot effectively ensure the positional degree and angle tolerance requirements during welding of marine engine pipe systems, especially the difficulty in welding positioning and fixing of bent pipes and straight pipes of different pipe diameters, which affects the quality and aesthetics of welding.
A welding positioning tool including a base, a first clamping mechanism, a second clamping mechanism, a hinge mechanism, a vertical lifting mechanism and a horizontal displacement fine-tuning mechanism are designed. Centering welding is achieved through adjustment of multiple degrees of freedom to improve positioning accuracy.
It significantly improves the welding accuracy and quality of metal pipe fittings, solves the butt welding problems of irregular pipe fittings such as bent pipes and reducer pipes, is convenient and quick to operate and easy to adjust.
Smart Images
Figure CN223172250U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a pipe system welding positioning tooling, in particular to a tooling for welding positioning and fixing of elbows and straight pipes with different pipe diameters, belonging to the technical field of special welding tooling. Background Art
[0002] The fuel pipe system, lubricating oil pipe system, low-temperature water pipe system, high-temperature water pipe system, compressed air pipe system, etc. of marine engines are all welded by metal pipe fittings. It is also necessary to weld sensor mounting seats, temperature gauge mounting seats, pressure gauge mounting seats, etc. on the metal pipe fittings. Pipe systems with different functions ensure the normal operation of marine engines. The pipe system of marine engines has a complex structure and high requirements for the welding position accuracy. At present, during the butt welding operation of two metal pipes, workers often directly hold one of the pipe fittings with one hand and align it with the other pipe fitting for butt welding. This welding method cannot ensure the requirements of the position tolerance and angle tolerance of the two pipe fittings after welding, directly affecting the assembly of the pipe system and the aesthetics of marine engines. Existing metal pipe fitting welding tooling cannot be used for welding positioning and fixing between elbows and straight pipes with unequal pipe diameters. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a welding positioning and fixing device for marine engine pipe systems that is convenient to operate and safe to use, and improve the welding positioning accuracy of elbows and straight pipes with different pipe diameters.
[0004] The utility model is realized through the following technical solutions:
[0005] A welding positioning and fixing tooling for marine engine pipe systems includes a base and a first clamping mechanism and a second clamping mechanism arranged at both ends of the base. The lower side of the first clamping mechanism is fixedly connected to a horizontal displacement fine-tuning mechanism supported on one end of the base through an inverted T-shaped column, and the lower side of the second clamping mechanism is fixedly connected to a manual horizontal moving mechanism supported on the other end of the base through a vertical lifting mechanism; the base includes a first base in the shape of a dovetail groove and a second base in the shape of a dovetail block. The adjacent ends of the first base and the second base are hinged through a hinge mechanism. One side of the hinge mechanism is provided with a hinge angle locking mechanism, and the lower side of the base is supported on the ground through a support mechanism;
[0006] The hinge mechanism includes a hinge pin, a pair of hinge pin bearings, an upper ear plate and a lower ear plate. The upper ear plate is held at one end of the first base; the hinge pin vertically passes through the other end of the upper ear plate, one end of the first base and one end of the lower ear plate. The middle of the hinge pin is supported in a through hole at one end of the first base through a pair of hinge pin bearings, and the upper end of the hinge pin is fixedly connected to one end of the upper ear plate; a baffle is fixed to the end of the second base far from the hinge pin;
[0007] The first clamping mechanism and the second clamping mechanism have the same structure and are symmetrically arranged. They respectively include a bearing seat, a sleeve, a pair of rolling bearings, a handwheel, and a self-centering welding chuck. The two ends of the sleeve are respectively supported in the corresponding bearing seats through the rolling bearings. The self-centering welding chucks are respectively fixed on the inner ends of the corresponding sleeves, and the handwheels are respectively fixed on the outer ends of the corresponding sleeves. The lower side of the bearing seat of the first clamping mechanism is fixed on the top of the inverted T-shaped column, and the bottom of the inverted T-shaped column is fixedly connected to the upper side of the horizontal displacement fine-tuning mechanism. The lower side of the bearing seat of the second clamping mechanism is fixedly connected to the upper end of the column, and one side of the lower end of the column is connected to one side of the vertical lifting mechanism. The damping mechanisms are respectively arranged between one end of the bearing seat and one end of the sleeve of the first clamping mechanism, and between one end of the bearing seat and one end of the sleeve of the second clamping mechanism.
[0008] The vertical lifting mechanism includes a vertical support column, a vertical lead screw, a vertical lifting nut, a horizontal transmission shaft, a horizontal transmission shaft support bearing, a lifting adjustment handwheel, and a pair of vertical lead screw support bearings. The lower part of the vertical lead screw radially extends out a lifting driven bevel gear. The upper and lower ends of the vertical lead screw are respectively supported in the upper and lower ends of the vertical support column through the vertical lead screw support bearings. The middle part of the horizontal transmission shaft is supported in one side of the lower end of the vertical support column through the horizontal transmission shaft support bearing. The lifting adjustment handwheel is fixed on one end head of the horizontal transmission shaft. The other end head of the horizontal transmission shaft radially extends out a lifting driving bevel gear, and the lifting driving bevel gear meshes with the lifting driven bevel gear. One end of the vertical lifting nut is screwed with the vertical lead screw, and the other end of the vertical lifting nut is fixed on one side of the column. The lower side of the bearing seat of the second clamping mechanism is fixed on the top of the column.
[0009] The horizontal displacement fine-tuning mechanism includes a horizontal lead screw, a dovetail-shaped fine-tuning nut, a horizontal support bearing, a horizontal support bearing seat, and a horizontal displacement adjustment handwheel. One side of the horizontal support bearing seat is fixed outside one side of the first base. One end of the horizontal lead screw is supported in the horizontal support bearing seat through the horizontal support bearing. The horizontal displacement adjustment handwheel is fixed on one end head of the horizontal lead screw extending out of the horizontal support bearing seat. The other end of the horizontal lead screw passes through one end of the first base and is screwed with the fine-tuning nut. The dovetail-shaped fine-tuning nut is embedded in the dovetail groove of the first base, and the bottom of the inverted T-shaped column is fixed on the top of the fine-tuning nut.
[0010] The manual horizontal movement mechanism includes a dovetail-shaped slider, a wedge bar, and a compression screw. The dovetail groove of the slider is embedded in the dovetail-shaped second base. The wedge bar is inserted between the dovetail groove on one side of the slider and the adjacent surface of the dovetail block of the second base, and the slider is locked at the required longitudinal position of the second base by the compression screw that presses against the side surface of the wedge bar.
[0011] The object of the present invention can also be further achieved by the following technical measures.
[0012] Further, the vertical lifting nut has a dovetail groove structure in the shape of a "mountain", and the vertical support column has a dovetail block structure with a central groove. The convex block in the middle of the "mountain" shape of the vertical lifting nut is embedded in the central groove of the vertical support column, and the convex block is screwed with the vertical lead screw.
[0013] Further, the hinge angle locking mechanism includes a mounting plate, a hinge pin brake block assembly, a horizontal hand-tightening screw and a locking nut. The hinge pin brake block assembly is embedded in the horizontal hole at one end of the first base; the hinge pin brake block assembly includes two upper and lower hinge pin brake blocks fixedly connected together. The mounting plate is fixed at both ends on the outside of one end of the first base and closes the horizontal hole. The horizontal hand-tightening screw is screwed into the center of the mounting plate and locked by the locking nut; the stepped head at one end of the horizontal hand-tightening screw is embedded in the hinge pin brake block stepped grooves of the two upper and lower hinge pin brake blocks that match it; the end faces of the two hinge pin brake blocks adjacent to the hinge pin are concave arc surfaces, and the radius of curvature of the concave arc surface matches the radius of the hinge pin.
[0014] Further, the damping mechanism includes a damping block assembly, a damping block seat, a vertical hand-tightening screw and a locking nut. The damping block assembly is vertically embedded in the vertical counterbore of the damping block seat. The damping block seats are respectively fixed on one end of the sleeve of the first clamping mechanism and the other end of the sleeve of the second clamping mechanism. The damping block assembly includes two left and right damping blocks fixedly connected. The vertical hand-tightening screw is screwed into the damping block seat at one end and locked by the locking nut; the stepped head at one end of the vertical hand-tightening screw is embedded in the damping block stepped grooves of the two left and right damping blocks that match it. The concave arc surfaces at one end of the two damping blocks are adjacent to one end of the corresponding sleeve, and the radius of curvature of the concave arc surface matches the radius of the corresponding sleeve.
[0015] Further, the maximum angle α at which the second base rotates around the hinge pin center is ±110°.
[0016] Further, the support mechanism includes inverted V-shaped double support legs respectively fixed on the lower sides of the ends of the first base far from the hinge pin and the lower sides of the ends of the second base far from the hinge pin, and vertical support legs respectively fixed on the first base and the second base near the hinge pin end and located under the longitudinal center line on the lower sides of the first base and the second base. The inverted V-shaped double support legs and the vertical support legs on the lower sides of the first base and the second base respectively support symmetrically on the ground in an isosceles triangle shape.
[0017] Further, the bottoms of the inverted V-shaped double support legs on the lower side of the second base and the bottoms of the vertical support legs are respectively supported on the ground by universal wheels.
[0018] The utility model clamps two straight pipes or bent pipes with different diameters respectively through a first clamping mechanism and a second clamping mechanism, and can adjust the positional accuracy of butt welding or offset welding of two straight pipes and bent pipes with different diameters through a vertical lifting mechanism, a horizontal displacement fine-tuning mechanism, a manual horizontal movement mechanism and a hinged mechanism, having four degrees of freedom of X-axis movement, X-axis rotation, Z-axis movement and Z-axis rotation. The operation is convenient and fast, the adjustment is simple, and it is convenient for the rotation and locking of pipe fittings. The welding accuracy and welding quality of metal pipe fittings are significantly improved, the alignment and fixation of the angles and spacings of each welding position are accurately realized, and the problem that it is difficult to accurately control the butt welding position of irregular pipe fittings such as bent pipes and different-diameter pipes is effectively solved.
[0019] The advantages and features of the utility model will be illustrated and explained through the non-restrictive description of the following preferred embodiments, which are given only as examples with reference to the attached drawings. Brief Description of the Drawings
[0020] Figure 1 is the front view of the utility model;
[0021] Figure 2 is Figure 1 the left view of
[0022] Figure 3 is Figure 1 the A-A sectional view of
[0023] Figure 4 is Figure 2 the B-B sectional view of
[0024] Figure 5 is Figure 4 the enlarged C-C sectional view of
[0025] Figure 6 is the structural diagram with the axes of the first base and the second base obliquely intersecting;
[0026] Figure 7 is Figure 4 the enlarged view of part Ⅰ of Detailed Description of the Preferred Embodiment
[0027] The following further illustrates the utility model with reference to the drawings and embodiments.
[0028] This embodiment is used for the positioning and fixing during the butt welding of straight pipes, bent pipes, different-diameter pipes and pipe groups with a pipe diameter not greater than 170 mm and a length not greater than 2000 mm.
[0029] Such as Figures 1 to 6As shown in the figure, this embodiment includes a base 1, a first clamping mechanism 2 and a second clamping mechanism 3 disposed at both ends of the base 1. The lower side of the first clamping mechanism 2 is fixedly connected to a horizontal displacement fine-tuning mechanism 5 supported on the left end of the base 1 through an inverted T-shaped column 4. The lower side of the second clamping mechanism 3 is fixedly connected to a manual horizontal moving mechanism 7 supported on the right end of the base 1 through a vertical lifting mechanism 6. The base 1 includes a first base 11 in the shape of a dovetail groove and a second base 12 in the shape of a dovetail block. The adjacent ends of the first base 11 and the second base 12 are hinged through a hinge mechanism 8. One side of the hinge mechanism 8 is provided with a hinge angle locking mechanism 85. The lower side of the base 1 is supported on the ground through a support mechanism 9.
[0030] As Figure 1 , Figure 3 and Figure 4 As shown in the figure, the hinge mechanism 8 includes a hinge pin 81, a pair of hinge pin bearings 82, an upper ear plate 83 and a lower ear plate 84. The right ends of the upper ear plate 83 and the lower ear plate 84 are respectively fixed on the left end of the second base 12. The left ends of the upper ear plate 83 and the lower ear plate 84 are clamped on the right end of the first base 11. The hinge pin 81 vertically passes through the left end of the upper ear plate 83, the right end of the first base 11 and the left end of the lower ear plate 84. The middle of the hinge pin 81 is supported in a through hole 111 at the right end of the first base 11 through a pair of hinge pin bearings 82. The upper end of the hinge pin 81 is fixedly connected to the left end of the upper ear plate 83 through a flat key. The maximum angle α at which the second base 12 of this embodiment rotates around the center of the hinge pin 81 is ±110°. A baffle 13 is fixed to the right end head of the second base 12 away from the hinge pin 71.
[0031] The first clamping mechanism 2 and the second clamping mechanism 3 have the same structure and are symmetrically arranged. They respectively include a bearing seat 21, a sleeve 22, a pair of rolling bearings 23, a handwheel 24 and a self-centering welding chuck 25. Both ends of the sleeve 22 are respectively supported in the corresponding bearing seats 21 through rolling bearings 23. The relatively arranged self-centering welding chucks 23 are respectively fixed on the adjacent inner ends of the corresponding sleeves 22. The handwheels 24 are respectively fixed on the outer ends of the corresponding sleeves 22. The lower side of the bearing seat 21 of the first clamping mechanism 2 is fixed on the top end of the inverted T-shaped column 4. The bottom of the inverted T-shaped column 4 is fixedly connected to the upper side of the horizontal displacement fine-tuning mechanism 5. The lower side of the bearing seat 21 of the second clamping mechanism 3 is fixedly connected to the upper end of a column 26. One side of the lower end of the column 26 is connected to the left side of the vertical lifting mechanism 31. Damping mechanisms 27 are respectively arranged between the left ends of the bearing seat 21 and the sleeve 22, and between the right ends of the bearing seat 21 and the sleeve 22 of the second clamping mechanism 3.
[0032] As Figure 4 and Figure 5As shown in the figure, the vertical lifting mechanism 6 includes a vertical support column 61, a vertical lead screw 62, a vertical lifting nut 63, a horizontal transmission shaft 64, a horizontal transmission shaft support bearing 65, a lifting adjustment handwheel 66 and a pair of vertical lead screw support bearings 67. A lifting driven bevel gear 621 radially extends from the lower part of the vertical lead screw 62. The upper and lower ends of the vertical lead screw 62 are respectively supported in the upper and lower ends of the vertical support column 61 through the vertical lead screw support bearings 67. The middle part of the horizontal transmission shaft 64 is supported in one side of the lower end of the vertical support column 61 through the horizontal transmission shaft support bearing 65. The lifting adjustment handwheel 66 is fixed to the right end head of the horizontal transmission shaft 64. A lifting driving bevel gear 641 radially extends from the left end head of the horizontal transmission shaft 64. The lifting driving bevel gear 641 meshes with the lifting driven bevel gear 621. The right end of the vertical lifting nut 63 is screwed with the vertical lead screw 62, and the left end of the vertical lifting nut is fixed to the right side of the column 26. The lower side of the bearing block 21 of the second clamping mechanism 3 is fixed to the top of the column 26.
[0033] Rotate the lifting adjustment handwheel 66 to drive the horizontal transmission shaft 64 to rotate. Through the meshing of the lifting driving bevel gear 641 on the horizontal transmission shaft 64 and the lifting driven bevel gear 621 at the lower end of the vertical lead screw 62, drive the vertical lead screw 62 to rotate, so that the vertical lifting nut 63 drives the second clamping mechanism 3 at the top of the column 26 to move up and down through the column 26. Through the lifting of the second clamping mechanism 3 to clamp the pipe fitting, the precise adjustment of the vertical position of the pipe fitting clamped by the second clamping mechanism 3 and the pipe fitting clamped by the first clamping mechanism 3 is completed.
[0034] As Figure 3 and Figure 6 shown in the figure, the vertical lifting nut 63 is a dovetail groove structure in the shape of a "mountain", and the vertical support column 61 is a dovetail block structure provided with a central groove 611. The convex block 631 in the middle of the "mountain" shape of the vertical lifting nut 63 is embedded in the central groove 611 of the vertical support column 61, and the convex block 631 is screwed with the vertical lead screw 62. The convex block 631 is accurately guided by the central groove 611, improving the moving accuracy of the vertical lifting nut 63.
[0035] The horizontal displacement fine adjustment mechanism 5 includes a horizontal lead screw 51, a fine adjustment nut 52 in the shape of a dovetail block, a horizontal support bearing 53, a horizontal support bearing seat 54 and a horizontal displacement adjustment handwheel 55. The right side of the horizontal support bearing seat 54 is fixed to the outside of the left side of the first base 11. The left end of the horizontal lead screw 51 is supported in the horizontal support bearing seat 54 through the horizontal support bearing 53. The horizontal displacement adjustment handwheel 55 is fixed to the left end head of the horizontal lead screw 51 extending out of the horizontal support bearing seat 54. The right end of the horizontal lead screw 51 passes through the left end of the first base 11 and is screwed with the fine adjustment nut 52. The dovetail block-shaped fine adjustment nut 52 is embedded in the dovetail groove 111 of the first base 11, and the bottom of the inverted T-shaped column 4 is fixed to the top of the fine adjustment nut 52.
[0036] Rotate the horizontal displacement adjustment handwheel 55 to drive the rotation of the horizontal lead screw 51, so as to drive the axial movement of the pipe fitting clamped by the first clamping mechanism 2 through the movement of the fine-tuning nut 52 and the inverted T-shaped column 4, and adjust the axial distance between the two butt-welded pipe fittings.
[0037] As Figure 5 shown, the manual horizontal movement mechanism 7 includes a dovetail-shaped slider 71, a wedge bar 72 and a compression screw 73. The dovetail groove 711 of the slider 71 is embedded in the dovetail-shaped second base 12. The wedge bar 72 is inserted between the adjacent surfaces of the dovetail groove 711 on one side of the slider 71 and the dovetail block 121 of the second base, and the slider 71 is locked at the required longitudinal position of the second base 12 by the compression screw 73 that is tightened against the side surface of the wedge bar 72.
[0038] As Figure 3 shown, the articulated angle locking mechanism 85 includes a mounting plate 851, an articulated pin brake block assembly 86, a horizontal hand-tightening screw 852 and a locking nut 853. The articulated pin brake block assembly 86 is embedded in the transverse hole 112 at the right end of the first base 11. The articulated pin brake block assembly 86 includes two upper and lower articulated pin brake blocks 861 fixedly connected together. The two ends of the mounting plate 851 are fixed to the outer side of the right end of the first base 11 and enclose the transverse hole 112. The horizontal hand-tightening screw 852 is screwed into the center of the mounting plate 851 and locked by the locking nut 853. The stepped head 854 at one end of the horizontal hand-tightening screw 852 is embedded in the stepped groove 862 of the articulated pin brake block of the two upper and lower articulated pin brake blocks 861 that match it. The end faces of the two articulated pin brake blocks 861 adjacent to the articulated pin 852 are concave arc surfaces, and the radius of curvature of the concave arc surface matches the radius of the articulated pin 852. When the utility model is used for welding two obliquely intersecting pipes, it is necessary to rotate the second base 12 around the center of the articulated pin 852 to the required angle, and tighten the horizontal hand-tightening screw 853 to tightly press the concave arc surfaces of the two upper and lower articulated pin brake blocks 861 against the outer peripheral surface of the articulated pin 81, so that the second base 12 is fixed at the required angular position, improving the positioning accuracy of the two obliquely intersecting pipes.
[0039] As Figure 7As shown, the damping mechanism 27 includes a damping block assembly 271, a damping block seat 272, a vertical hand-tightening screw 273 and a locking nut 853. The damping block assembly 271 is vertically embedded in the vertical counterbore 274 of the damping block seat. The damping block seat 272 is respectively fixed on the left end of the sleeve 22 of the first clamping mechanism 2 and the right end of the sleeve 22 of the second clamping mechanism 3. The damping block assembly 271 includes two damping blocks 275 fixedly connected left and right. One end of the vertical hand-tightening screw 273 is screwed into the damping block seat 272 and locked by the locking nut 853. The stepped head 276 at one end of the vertical hand-tightening screw 273 is embedded in the damping block stepped grooves 277 of the two matching damping blocks 275 on the left and right. One end of the two damping blocks 275 has an inward concave arc surface adjacent to one end of the corresponding sleeve 22. The radius of curvature of the inward concave arc surface matches the radius of the corresponding sleeve 22.
[0040] The damping mechanism 27 controls the frictional force between the damping block assembly 271 and the corresponding sleeve 22 through the vertical hand-tightening screw 273. When the present utility model is used for welding equal-diameter or unequal-diameter straight pipes to straight pipes, straight pipes are respectively inserted into the sleeves 22 of the first clamping mechanism 2 and the second clamping mechanism 3. After adjusting the axial positions of the two straight pipes in the corresponding sleeves 22, after clamping the straight pipes with the self-centering welding chucks 23 on the opposite end faces of the corresponding sleeves 22 respectively, tighten the compression screw 73 to make the side surface of the wedge bar 72 press against the slider 71, thereby fixing the second clamping mechanism 3 at the required longitudinal position of the second base 12 to prevent axial displacement during the positioning and fixing of the two straight pipes. Then tighten the vertical hand-tightening screw 273 of the damping mechanism 27 to adjust the frictional force between the damping block assembly 271 and the corresponding sleeve 22 to prevent the straight pipe from rotating.
[0041] When the present utility model is respectively used for welding a bent pipe to a straight pipe, welding a bent pipe to a mounting seat, welding a bent pipe to a bent pipe, welding a bent pipe to a reducing pipe, and welding a pipe group to a pipe fitting, insert the heavier pipe fitting or pipe group into the sleeve 22 of the first clamping mechanism 2 at the left end of the present utility model, insert the lighter pipe fitting into the sleeve 22 of the second clamping mechanism 2 at the right end of the present utility model. After clamping their respective pipe fittings or pipe groups with the two opposite self-centering welding chucks 23 respectively, then tighten the vertical hand-tightening screw 273 of the damping mechanism 27 and lock it with the locking nut 853 to adjust the frictional force between the damping block assembly 271 and the corresponding sleeve 22, ensuring that the alignment angle or position of the two pipe fittings or pipe groups to be welded is adjusted through the handwheel 24, preventing the pipe fittings or pipe groups from rotating due to the action of the eccentric moment, and improving the position accuracy of pipe fitting welding.
[0042] As Figures 1 to 3As shown in the figure, the support mechanism 9 includes an eight-shaped double support leg 91 respectively fixed to the lower side of the left end head of the first base away from the hinge pin 81 and the lower side of the right end head of the second base 12 away from the hinge pin, and vertical support legs 92 respectively fixed to one ends of the first base 11 and the second base 12 close to the hinge pin 81 and located below the longitudinal center line on the lower sides of the first base 11 and the second base 12. The eight-shaped double support legs 91 and the vertical support legs 92 on the lower sides of the first base 11 and the second base 12 respectively support on the ground in a symmetric isosceles triangle, improving the support stability of the present utility model. The bottoms of the eight-shaped double support legs 91 and the vertical support legs 92 on the lower side of the second base are respectively supported on the ground through universal wheels 911, facilitating the movement of the present utility model.
[0043] Now take Figure 1 the welding of the elbow 10 with a larger pipe diameter and the straight pipe 20 with a smaller pipe diameter in the figure as an example to illustrate the working process of the present utility model. At this time, the perforations at the welding positions of the elbow 10 and the straight pipe 20 have been processed.
[0044] 1) Rotate the handwheel 24 to move the horizontal displacement fine adjustment mechanism 5, the inverted T-shaped column 4 and the first clamping mechanism 2 on the first base 11 to the leftmost side of the first base 11; loosen the compression screw 73 of the manual horizontal movement mechanism 7, and move the manual horizontal movement mechanism 7, the column 26, the vertical lifting mechanism 6 and the second clamping mechanism 3 to the rightmost side of the second base 11 until they abut against the baffle 13.
[0045] 2) First, open the self-centering welding chucks 25 of the first clamping mechanism 2 and the second clamping mechanism 3 respectively, then insert the horizontal section of the elbow 10 into the corresponding self-centering welding chuck 25 respectively, insert the straight pipe 20 into the corresponding self-centering welding chuck 25 respectively. After determining the clamping positions of the elbow 10 and the straight pipe 20 respectively, then clamp the respective pipe fittings with the self-centering welding chuck 25 respectively, and adjust the rotational damping force of the damping mechanism 27 of the first clamping mechanism 2 and the second clamping mechanism 3 respectively. It is better that it can be rotated by hand pushing and stops when the hand is released.
[0046] 3) Use the horizontal displacement fine adjustment mechanism 5 and the manual horizontal movement mechanism 7 to respectively perform the docking adjustment in the horizontal direction of the elbow 10 and the straight pipe 20. After completion, tighten the compression screw 73 to lock the manual horizontal movement mechanism 7.
[0047] 4) Use the vertical lifting mechanism 6 to align the axis of the straight pipe 20 with the axis of the horizontal section of the elbow 10 in the height direction, thereby completing the positioning and fixing of the elbow 10 and the straight pipe 20.
[0048] In addition to the above embodiments, the present utility model can also have other implementation manners. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present utility model.
Claims
1. A welding positioning and fixing tooling for a marine engine piping system, characterized in that, It includes a base, a first clamping mechanism and a second clamping mechanism arranged at both ends of the base. The lower side of the first clamping mechanism is fixedly connected to a horizontal displacement fine-tuning mechanism supported on one end of the base through an inverted T-shaped column, and the lower side of the second clamping mechanism is fixedly connected to a manual horizontal movement mechanism supported on the other end of the base through a vertical lifting mechanism; the base includes a first base in the shape of a dovetail groove and a second base in the shape of a dovetail block. The adjacent ends of the first base and the second base are hinged through a hinge mechanism, and a hinge angle locking mechanism is arranged on one side of the hinge mechanism. The lower side of the base is supported on the ground through a support mechanism; The hinge mechanism includes a hinge pin, a pair of hinge pin bearings, an upper ear plate and a lower ear plate. One end of the upper ear plate and one end of the lower ear plate are respectively fixed on one end of the second base. The other end of the upper ear plate and the other end of the lower ear plate are clamped on one end of the first base; the hinge pin vertically passes through the other end of the upper ear plate, one end of the first base and one end of the lower ear plate. The middle of the hinge pin is supported in a through hole at one end of the first base through a pair of hinge pin bearings, and the upper end of the hinge pin is fixedly connected to one end of the upper ear plate; a baffle is fixed on the end head of the second base far from the hinge pin; The first clamping mechanism and the second clamping mechanism have the same structure and are symmetrically arranged. They respectively include a bearing seat, a sleeve, a pair of rolling bearings, a handwheel and a self-centering welding chuck. Both ends of the sleeve are respectively supported in the corresponding bearing seats through rolling bearings. The self-centering welding chucks are respectively fixed on the inner ends of the corresponding sleeves, and the handwheels are respectively fixed on the outer ends of the corresponding sleeves; the lower side of the bearing seat of the first clamping mechanism is fixed on the top of the inverted T-shaped column, and the bottom of the inverted T-shaped column is fixedly connected to the upper side of the horizontal displacement fine-tuning mechanism; the lower side of the bearing seat of the second clamping mechanism is fixedly connected to the upper end of the column, and one side of the lower end of the column is connected to one side of the vertical lifting mechanism; damping mechanisms are respectively arranged between one end of the bearing seat and one end of the sleeve of the first clamping mechanism, and between one end of the bearing seat and one end of the sleeve of the second clamping mechanism; The vertical lifting mechanism includes a vertical support column, a vertical lead screw, a vertical lifting nut, a horizontal transmission shaft, a horizontal transmission shaft support bearing, a lifting adjustment handwheel and a pair of vertical lead screw support bearings. A lifting driven bevel gear extends radially from the lower part of the vertical lead screw. The upper and lower ends of the vertical lead screw are respectively supported in the upper and lower ends of the vertical support column through vertical lead screw support bearings. The middle of the horizontal transmission shaft is supported in one side of the lower end of the vertical support column through a horizontal transmission shaft support bearing. The lifting adjustment handwheel is fixed on the end head of one end of the horizontal transmission shaft. A lifting driving bevel gear extends radially from the end head of the other end of the horizontal transmission shaft. The lifting driving bevel gear meshes with the lifting driven bevel gear; one end of the vertical lifting nut is screwed with the vertical lead screw, and the other end of the vertical lifting nut is fixed on one side of the column. The lower side of the bearing seat of the second clamping mechanism is fixed on the top of the column; The horizontal displacement fine-tuning mechanism includes a horizontal lead screw, a fine-tuning nut in the shape of a dovetail block, a horizontal support bearing, a horizontal support bearing seat, and a horizontal displacement adjustment handwheel. One side of the horizontal support bearing seat is fixed outside one side of the first base. One end of the horizontal lead screw is supported in the horizontal support bearing seat through the horizontal support bearing, and the horizontal displacement adjustment handwheel is fixed on the end of the horizontal lead screw extending out of the horizontal support bearing seat. The other end of the horizontal lead screw passes through one end of the first base and is screwed with the fine-tuning nut. The dovetail block-shaped fine-tuning nut is embedded in the dovetail groove of the first base, and the bottom of the inverted T-shaped column is fixed on the top of the fine-tuning nut. The manual horizontal movement mechanism includes a slider in the shape of a dovetail groove, a wedge bar, and a compression screw. The dovetail groove of the slider is embedded in the dovetail block of the second base. The wedge bar is inserted between the adjacent surfaces of the dovetail groove on one side of the slider and the dovetail block of the second base, and the slider is locked at the required longitudinal position of the second base by the compression screw that presses against the side of the wedge bar.
2. The welding positioning and fixing tooling for the marine engine piping system according to claim 1, wherein, The vertical lifting nut has a dovetail groove structure in the shape of a "mountain", and the vertical support column has a dovetail block structure with a central groove. The convex block in the middle of the "mountain" shape of the vertical lifting nut is embedded in the central groove of the vertical support column, and the convex block is screwed with the vertical lead screw.
3. The welding positioning and fixing tooling for the marine engine piping system according to claim 1, characterized in that The articulated angle locking mechanism includes a mounting plate, an articulated pin brake block assembly, a horizontal hand-tightening screw, and a locking nut. The articulated pin brake block assembly is embedded in the horizontal hole at one end of the first base. The articulated pin brake block assembly includes two upper and lower articulated pin brake blocks fixedly connected together. The two ends of the mounting plate are fixed outside one end of the first base and enclose the horizontal hole. The horizontal hand-tightening screw is screwed into the center of the mounting plate and locked by the locking nut. The stepped head at one end of the horizontal hand-tightening screw is embedded in the stepped groove of the articulated pin brake block that matches it. The end faces of the two articulated pin brake blocks adjacent to the articulated pin are concave arc-shaped surfaces, and the curvature radius of the concave arc-shaped surface matches the radius of the articulated pin.
4. The welding positioning and fixing tooling for the marine engine piping system according to claim 1, wherein The damping mechanism includes a damping block assembly, a damping block seat, a vertical hand-tightening screw, and a locking nut. The damping block assembly is vertically embedded in the vertical counterbore of the damping block seat. The damping block seats are respectively fixed on one end of the sleeve of the first clamping mechanism and the other end of the sleeve of the second clamping mechanism. The damping block assembly includes two left and right damping blocks fixedly connected together. One end of the vertical hand-tightening screw is screwed into the damping block seat and locked by the locking nut. The stepped head at one end of the vertical hand-tightening screw is embedded in the stepped groove of the left and right damping blocks that matches it. The concave arc-shaped surfaces at one end of the two damping blocks are adjacent to one end of the corresponding sleeve, and the curvature radius of the concave arc-shaped surface matches the radius of the corresponding sleeve.
5. The welding positioning and fixing tooling for the marine engine piping system according to claim 1, wherein The maximum angle α at which the second base rotates around the center of the articulated pin is ±110°.
6. The welding positioning and fixing tooling for the marine engine piping system as described in claim 1, wherein, The support mechanism includes inverted V-shaped double support legs respectively fixed on the lower sides of the ends of the first base far from the articulated pin and the lower sides of the ends of the second base far from the articulated pin, and vertical support legs respectively fixed on the first base and the second base near the articulated pin end and located under the longitudinal center line on the lower sides of the first base and the second base. The inverted V-shaped double support legs and the vertical support legs on the lower sides of the first base and the second base respectively form symmetric isosceles triangles to support on the ground.
7. The welding positioning and fixing tooling for the marine engine piping system according to claim 6, characterized in that, The bottoms of the V-shaped double support legs on the lower side of the second base and the bottom of the vertical support legs are respectively supported on the ground by universal wheels.