CN218903948U

CN218903948U - EGR pipe annular welding clamping device

Info

Publication number: CN218903948U
Application number: CN202223289508.7U
Authority: CN
Inventors: 杨建�; 史亮; 毛涛; 苏海; 蒋燕刚; 刘达; 孙楠; 刘庆明; 徐彬; 李楠; 彭丽华
Original assignee: Yancheng Meilianqiao Auto Parts Co ltd
Current assignee: Yancheng Meilianqiao Auto Parts Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-04-25
Anticipated expiration: 2032-12-08

Abstract

The utility model discloses an EGR pipe annular welding clamping device which comprises a linear mandrel, a first connecting plate, a long spacer bush, a pressing clamp, a second connecting plate, a pressing plate and a connecting column, wherein the first end of the first connecting plate is vertically fixed on the side part of the front end of the mandrel, the lower end of the long spacer bush is fixed at the second end of the first connecting plate, the pressing clamp is fixed at the upper end of the long spacer bush, the second connecting plate is fixed in front of the second end of the first connecting plate, the pressing plate is arranged at the front end of the pressing clamp, the connecting column is fixed below the pressing plate, and the connecting column is coaxial with a threaded hole of a special-shaped flange A; when the special-shaped flange A of the EGR pipe is pressed and fixed on the second connecting plate by the connecting column, the double-layer corrugated pipe of the EGR pipe and the mandrel are coaxial, and a space is reserved between the ring welding position II and the front end of the mandrel. The EGR pipe welding device has the advantages of no need of secondary clamping, one-time welding and forming of the EGR pipe, no damage to the double-layer corrugated pipe, relatively small workload and high working efficiency.

Description

EGR pipe annular welding clamping device

Technical Field

The utility model relates to the technical field of EGR (exhaust gas recirculation) pipe production, in particular to an EGR pipe annular welding clamping device.

Background

The assembled EGR pipe is formed by interference assembly of a special-shaped flange A, a double-layer corrugated pipe (single-layer wall thickness is 0.2 mm) and a special-shaped flange B, and argon arc girth welding is needed to be carried out at the lap joint (called a girth welding position I and a girth welding position II) of the double-layer corrugated pipe and the special-shaped flange A and the special-shaped flange B respectively.

The general ring welding clamping device commonly used for argon arc ring welding mainly comprises a crankshaft (a transverse fold type or a transverse fold type similar to a third pen with a concave shape and divided into three sections, a vertical second section), a connecting plate, a long spacer bush, a pressing clamp, a movable clamping block, a fixed clamping block, a plug and an L-shaped thread two-way; the first end (first section) of the crankshaft is clamped on the chuck; the connecting plate is fixed at the second end (third section) of the crankshaft; the long spacer bush is fixed at one end of the connecting plate far away from the crankshaft; the pressing pliers are fixed on the long spacer bush; the movable clamping block is arranged at the front end (the end far away from the handle) of the pressing clamp; the fixed clamping block is fixed at the other end of the connecting plate; when the pressing pliers act, the movable clamping blocks can be driven to move, the movable clamping blocks and part of the connecting plates hold the corrugated pipe, so that the EGR pipe is positioned and clamped on the girth welding clamping device (the double-layer corrugated pipe and the first end of the crankshaft are coaxial at the moment, the girth welding position II is at the third section of the crankshaft, and one side of the girth welding position II, which is close to the third section of the crankshaft, is limited and cannot be welded); the chuck is driven to rotate by the power on of a control device motor, so that the universal girth welding clamping device is driven to rotate, and the EGR pipe is rotated (the clamped part of the EGR pipe is a double-layer corrugated pipe, and the double-layer corrugated pipe and the chuck are coaxial); the end cap is arranged at the end part of the special-shaped flange B, the L-shaped threaded two-way valve is arranged at the end surface of the end cap, the L-shaped threaded two-way valve is connected with the L-shaped threaded two-way valve through an air pipe, and protective gas is introduced into the EGR pipe; and (3) operating the welding gun by a welder, and performing girth welding operation on the two positions of the girth welding position 1 and the girth welding position 2 respectively.

The existing general ring welding clamping device has the following defects: 1. because the wall thickness of the double-layer corrugated pipe is thinner (the wall thickness of a single layer is 0.2 mm), clamping damage is easily caused to the double-layer corrugated pipe when the double-layer corrugated pipe is held, and pits appear on the surface of the double-layer corrugated pipe; 2. the special-shaped flange A is influenced by the dead weight (the special-shaped flange A is far away from the double-layer corrugated pipe and is almost vertical to the double-layer corrugated pipe, and the special-shaped flange A is heavier than the special-shaped flange B), so that the double-layer corrugated pipe is bent and distorted in the rotating process; 3. the clamping part is unreasonable and is influenced by the crankshaft, the welding cannot be completed once (mainly, the second ring welding position is limited, the first ring welding position is not limited), the welding operation cannot be completed by the primary clamping, the welding is completed by the secondary clamping and overturning position, and the working intensity of staff is high; 4. the defect 3 shows that secondary welding is needed, and the problem of discontinuous welding seams easily occurs in secondary welding, so that the product quality is affected; 5. as can be seen from the

drawbacks

3 and 4, secondary holding and secondary welding are required, which affects the working efficiency.

Disclosure of Invention

Therefore, the utility model provides an EGR tube ring welding clamping device to solve the technical problems.

In order to achieve the above object, the present utility model provides the following technical solutions:

the utility model provides an EGR pipe ring welds clamping device, includes sharp dabber, first connecting plate, long spacer, pressure pincers, second connecting plate, clamp plate and spliced pole, the first end of first connecting plate is fixed perpendicularly the front end lateral part of dabber, the lower extreme of long spacer is fixed the second end of first connecting plate, pressure pincers are fixed the upper end of long spacer, the second connecting plate is fixed the place ahead of the second end of first connecting plate, the clamp plate sets up the front end of pressure pincers, the spliced pole is fixed the below of clamp plate, the spliced pole is coaxial with special-shaped flange A's screw hole; when the special-shaped flange A of the EGR pipe is pressed and fixed on the second connecting plate by the connecting column, the double-layer corrugated pipe of the EGR pipe and the mandrel are coaxial, and a space is reserved between the ring welding position II and the front end of the mandrel.

Further, at least two connecting columns are arranged.

Further, the lower end of the connecting column is provided with a rubber pad.

Further, the EGR pipe ring welding clamping device further comprises a positioning pin, the positioning pin is arranged on the upper side of the second connecting plate, the positioning pin is coaxial with the threaded hole of the special-shaped flange A, and the height of the positioning pin is not higher than the depth of the threaded hole.

Further, the EGR pipe annular welding clamping device further comprises a plug and an L-shaped threaded two-way connector, wherein the plug is arranged at the end part of the special-shaped flange B, and the L-shaped threaded two-way connector is arranged on the end face of the plug.

The utility model has the following advantages:

when in use, the first end of the mandrel is clamped on the chuck; the end part of the special-shaped flange A is abutted against the upper side surface of the second connecting plate, the end part of the special-shaped flange A and the upper side surface of the second connecting plate can be positioned through positioning pins, the pressing plate and the connecting column are driven by the pressing clamp to move together, and the connecting column is abutted against the edge of the threaded hole in the back of the special-shaped flange A, so that the EGR pipe is fixed; the protection gas is introduced into the EGR pipe through the L-shaped thread which is connected with the air pipe; the chuck is driven to rotate by the equipment motor so as to drive the tool and the EGR pipe to rotate. The double-layer corrugated pipe of the fixed EGR pipe is coaxial with the mandrel (realized by the mandrel and the connecting plate, in practice, when the tool is designed, the aim of collineation of the double-layer corrugated pipe and the mandrel is determined firstly, and then the tool is designed according to the aim); and the first end of first connecting plate is fixed perpendicularly in the front end lateral part of dabber, and the place ahead at the second end of first connecting plate is fixed to the second connecting plate simultaneously, leads to double-deck bellows's both ends (need carry out the position that the girth welds) and the front end of dabber to have certain interval, consequently can once only accomplish the girth, the welding seam is continuous, also does not need the secondary to press from both sides dress, work efficiency is high. The pressing plate and the connecting column (the rubber cushion is arranged at the lower end of the connecting column) are driven by the pressing pliers to fix the special-shaped flange A on the second connecting plate, so that the fixing of the EGR pipe is completed, the double-layer corrugated pipe is not required to be clamped, and clamping damage to the double-layer corrugated pipe is avoided. The clamping of the special-shaped flange A is performed, so that the problem that the double-layer corrugated pipe is bent and distorted under the influence of the dead weight of the special-shaped flange A is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.

The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the utility model, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present utility model, should fall within the scope of the utility model.

Fig. 1 is a schematic structural diagram of an EGR pipe ring welding clamping device according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of another view direction of the EGR pipe circumferential welding clamping device according to the embodiment of the present utility model;

fig. 3 is a schematic structural view of an EGR pipe circumferential welding clamping device according to another embodiment of the present utility model.

In the figure: the welding device comprises a 1-mandrel, a 2-first connecting plate, a 3-long spacer bush, a 4-pressing clamp, a 5-pressing plate, a 6-connecting column, a 7-rubber pad, an 8-second connecting plate, a 9-special-shaped flange A, a 10-plug, an 11-L-shaped threaded two-way joint, a 12-special-shaped flange B, a 13-double-layer corrugated pipe, a 14-girth welding position two and a 15-pin hole.

Detailed Description

Other advantages and advantages of the present utility model will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms such as "upper", "lower", "left", "right", "middle" and the like are also used in the present specification for convenience of description, but are not intended to limit the scope of the present utility model, and the changes or modifications of the relative relationship thereof are considered to be within the scope of the present utility model without substantial modification of the technical content.

As shown in fig. 1 to 3, the present embodiment provides an EGR pipe ring welding clamping device, which includes a mandrel 1, a first connecting plate 2, a long spacer 3, a pressing clamp 4, a second connecting plate 8, a positioning pin (not shown in the drawings), a pressing plate 5, a connecting column 6, a rubber pad 7, a plug 10 and an L-shaped threaded two-way 11.

The mandrel 1 is linear and has a first end clamped to a chuck (e.g., a three-jaw chuck, a four-jaw chuck, etc. of a machine tool, or a chuck of another apparatus), and a second end for securing the first connecting plate 2.

The first connecting plate 2 is rectangular in shape as a whole, the length direction and the axis direction of the mandrel 1 are perpendicular to each other (because the first connecting plate 2 is fixed on the circumferential side of the mandrel 1), the first end of the first connecting plate 2 is fixed on the circumferential side of the second end of the mandrel 1, and the upper side surface (defined manually, the side on which the long spacer 3 is mounted) of the second end is used for mounting the long spacer 3.

The long spacer bush 3 is located at the upper side of the second end of the first connecting plate 2 and is used for fixing the pressing clamp 4, so that the pressing clamp 4 has a certain height. The pressing pliers 4 are fixed at the upper end of the long spacer bush 3, and the lower end of the long spacer bush 3 is fixed with the first connecting plate 2. The pressing clamp 4 and the long spacer bush 3 are the same as those in the general girth welding clamping device.

The second connecting plate 8 is fixed to the front side of the second end of the first connecting plate 2 (defined as the first end of the mandrel 1 is the rear, and the second end of the mandrel 1 is the front), and is used for installing the locating pin and abutting against the end face of the special-shaped flange A9. The locating pin sets up in the upside of second connecting plate 8, and the locating pin is coaxial with the screw hole of abnormal shape flange A9, and the high degree of depth that is not higher than the screw hole of abnormal shape flange A9 of locating pin, avoids influencing spliced pole 6 and cushion 7 and compresses tightly abnormal shape flange A9. Generally, the positioning pin passes from the lower side to the upper side of the second connection plate 8 (the second connection plate 8 is provided with a pin hole 15, and the positioning pin passes through the pin hole 15) and is exposed to a certain height.

The pressing plate 5 is fixed at the front end of the pressing jaw 4, similar to the fixed form of the movable clamp block and the pressing jaw 4, and is used for installing the connecting column 6. The connecting column 6 is provided with at least two, at most the same number of threaded holes as the special-shaped flange A9, the upper end of the connecting column 6 is fixed at the lower side of the pressing plate 5, and the axis of the connecting column is collinear with the axis of the threaded holes of the special-shaped flange A9. The cushion 7 is installed to the lower extreme of spliced pole 6, and the existence of cushion 7 can avoid spliced pole 6 to damage abnormal shape flange A9. In general, the connecting column 6 and the rubber pad 7 have the same diameter but larger than the nominal diameter of the threaded hole of the special-shaped flange A9, so that the connecting column 6 and the rubber pad 7 can be pressed around the threaded hole of the special-shaped flange A9, and the special-shaped flange A9 is pressed on the second connecting plate 8 under the driving of the pressing clamp 4.

The plug 10 is arranged at the end part of the special-shaped flange B12, and the L-shaped threaded two-way valve 11 is arranged at the end face of the plug 10. The plug 10 and the L-shaped threaded two-way joint 11 are the same as those in a general ring welding clamping device.

The above mentioned fixing means welding fixing or bolt, screw connection fixing, but other forms of fixing, such as riveting, etc. can be adopted.

In the circumferential welding clamping device provided by the embodiment, the coaxial line of the double-layer corrugated pipe 13 of the fixed EGR pipe and the mandrel 1 is taken as one of design targets at the beginning of design, so that the dimensions of the mandrel 1, the first connecting plate 2 and the second connecting plate 8 (such as the length of the first connecting plate 2, the distance between the second connecting plate 8 and the axis of the mandrel 1, the diameter of the mandrel 1 and the like) are designed in the subsequent design process, and the coaxial line of the double-layer corrugated pipe 13 of the fixed EGR pipe and the mandrel 1 is ensured. The second design objective is that a space is reserved between the second girth welding position 14 and the front end of the mandrel 1, and in order to ensure the space, the first connecting plate 2 is connected to the front end (the second end) of the mandrel 1, and the second connecting plate 8 is fixed to the front side of the first connecting plate 2, so that the second girth welding position 14 can be separated from the front end of the mandrel 1 by a certain distance.

When in use, the first end of the mandrel 1 is clamped on the chuck; the end part of the special-shaped flange A9 is propped against the upper side surface of the second connecting plate 8, and the two parts can be positioned by positioning pins; the pressing clamp 4 is utilized to drive the pressing plate 5 and the connecting column 6 to move together, and the connecting column 6 is propped against the edge of the threaded hole at the back of the special-shaped flange A9, so that the EGR pipe is fixed; the protection gas is introduced into the EGR pipe through the air pipe connection L-shaped threaded two-way valve 11; the equipment motor is utilized to drive the chuck to rotate so as to drive the tool and the EGR pipe to rotate; and welding is performed while rotating, so that ring welding is completed at one time.

The double-layer corrugated pipe 13 of the fixed EGR pipe is coaxial with the mandrel 1; moreover, the two ends of the double-layer corrugated pipe 13 (particularly the second ring welding position 14) and the front end of the mandrel 1 have a certain distance, so that ring welding can be completed at one time, and the continuous welding seam is ensured; meanwhile, secondary clamping is not needed, and further the working efficiency is improved. The pressing plate 5 and the connecting column 6 (the rubber cushion 7 is arranged at the lower end of the connecting column 6) are driven by the pressing clamp 4 to press and fix the special-shaped flange A9 on the second connecting plate 8, so that the fixing of the EGR pipe is completed, the double-layer corrugated pipe 13 is not required to be clamped, and clamping damage to the double-layer corrugated pipe 13 is avoided. The clamping of the special-shaped flange A9 is performed, so that the problem that the double-layer corrugated pipe 13 is bent and distorted under the influence of the dead weight of the special-shaped flange A9 is avoided.

While the utility model has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the utility model and are intended to be within the scope of the utility model as claimed.

Claims

1. The utility model provides an EGR pipe ring welds clamping device which characterized in that, includes sharp dabber, first connecting plate, long spacer, press pliers, second connecting plate, clamp plate and spliced pole, the first end of first connecting plate is fixed perpendicularly the front end lateral part of dabber, the lower extreme of long spacer is fixed the second end of first connecting plate, press pliers is fixed the upper end of long spacer, the second connecting plate is fixed the place ahead of the second end of first connecting plate, the clamp plate sets up press pliers's front end, the spliced pole is fixed the below of clamp plate, the spliced pole is coaxial with special-shaped flange A's screw hole;

when the special-shaped flange A of the EGR pipe is pressed and fixed on the second connecting plate by the connecting column, the double-layer corrugated pipe of the EGR pipe and the mandrel are coaxial, and a space is reserved between the ring welding position II and the front end of the mandrel.

2. The EGR pipe circumferential welding clamping device of claim 1, wherein the connecting posts are provided in at least two.

3. The EGR pipe circumferential welding clamping device according to claim 1, wherein a rubber pad is provided at a lower end of the connecting column.

4. The EGR pipe circumferential welding clamping device according to claim 1, further comprising a positioning pin provided on an upper side of the second connection plate, the positioning pin being coaxial with the screw hole of the profiled flange a, and a height of the positioning pin being not higher than a depth of the screw hole.

5. The EGR pipe circumferential welding clamping device of claim 1, further comprising a plug and an L-shaped threaded two-way, wherein the plug is disposed at an end of the profiled flange B, and the L-shaped threaded two-way is disposed at an end face of the plug.