Workpiece welding device

Abstract

A workpiece welding device relates to the technical field of positioning devices for welding and comprises an upper clamping assembly and a lower clamping assembly which are coaxially arranged from top to bottom, an inner supporting assembly stretching and retracting in the radial direction is arranged between the upper clamping assembly and the lower clamping assembly, and the position of the inner supporting assembly is adjusted in the vertical direction through a height adjusting assembly. The height adjusting assembly comprises a threaded mandrel fixed to the lower clamping disc, and the threaded mandrel is in threaded connection with a limiting nut corresponding to the inner supporting assembly. The device solves the problems that a device in the prior art is generally only suitable for designed products, the height cannot be adjusted, or only several fixed heights can be adjusted, so that the height direction cannot be flexibly adjusted; the problems that different products cannot be adapted to use, and the relative positions of welding sub-pieces cannot be effectively limited are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding positioning devices, in particular to a workpiece welding device. Background Art

[0002] Casing parts are one of the important components of gas turbine products, some of which are welded. Due to the high requirements for product operating conditions, the most commonly used welding types are electron beam welding and argon arc welding. The casing is usually welded by flanges, barrel walls (often welded after plate rolls), etc. Since electron beam welding has high requirements for the gap and misalignment of the welded parts, which usually need to be controlled within a few microns to tens of microns, in actual welding, there are often quality accidents such as welding failures due to excessive gaps between parts and misalignment. Therefore, the processing quality of welded parts and the gap control and misalignment between workpieces during assembly will directly affect the quality of welding.

[0003] A patent with publication number CN103639751B is disclosed in the prior art. The solution includes a base, a positioning plate is arranged above the base, and the base and the positioning plate are fixedly connected through a ring seat; a first through hole is arranged at the center of the positioning plate, a turntable is arranged above the positioning plate, the turntable axis is arranged at the upper part of the first through hole of the positioning plate, a support ring with a protrusion is arranged below the turntable, and the protrusion of the support ring is arranged at the lower part of the first through hole of the positioning plate; the turntable is fixedly connected to the support ring, and the turntable and the support ring are respectively matched with the positioning plate gap; a plurality of pull rods are arranged along the circumference above the positioning plate, one end of the pull rod is respectively hinged to the turntable, a second through hole is arranged at the other end of the pull rod, a guide groove is arranged on the positioning plate below the second through hole of the pull rod, and a pressure plate is arranged above each pull rod, and the pressure plate is arranged above the pull rod through a screw, and one end of the screw is fixedly connected to the pressure plate.

[0004] The existing devices including the above patents have gradually exposed their shortcomings as they are used, mainly in the following aspects:

[0005] First, the existing devices are usually only suitable for the designed products, and the height cannot be adjusted or can only be adjusted to a few fixed heights, resulting in the inability to achieve flexible adjustment in the height direction.

[0006] Second, the existing device cannot adapt to the use of different products, and the relative positions of the welding parts cannot be effectively restricted.

[0007] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] In view of the defects in the prior art, the utility model solves the problem that the devices in the traditional technology are usually only suitable for the designed products, the height cannot be adjusted or can only be adjusted to a few fixed heights, resulting in the inability to flexibly adjust the height direction; it cannot adapt to the use of different products, and the relative positions of welding parts cannot be effectively restricted.

[0009] In order to solve the above problems, the utility model provides the following technical solutions:

[0010] The workpiece welding device comprises an upper clamping assembly and a lower clamping assembly which are coaxially arranged from top to bottom, and an inner support assembly which is telescopic in the radial direction is arranged between the upper clamping assembly and the lower clamping assembly.

[0011] The position of the inner support assembly is adjusted vertically by a height adjustment assembly.

[0012] The height adjustment assembly includes a threaded spindle fixed on the lower clamping plate, and a limit nut is threadedly connected on the threaded spindle corresponding to the inner support assembly.

[0013] As an optimized solution, the upper clamping assembly includes an upper clamping plate, and an upper positioning ring is fixed to the lower surface of the upper clamping plate.

[0014] As an optimized solution, the lower clamping assembly includes a lower clamping plate, and a lower positioning ring is fixed to the upper surface of the lower clamping plate.

[0015] As an optimized solution, the inner support assembly includes an expansion body, and the expansion body is circumferentially provided with a plurality of expansion plates, and each expansion plate independently slides in the radial direction to adjust its position.

[0016] As an optimized solution, the expansion body is provided with a sliding groove corresponding to each of the expansion plates, an expansion rod is slidably arranged in the sliding groove, the expansion plate is fixed on the outer end of the expansion rod, a wedge block is vertically movable in the sliding groove, and the inner end of the expansion rod is abutted against a wedge surface on one side of the wedge block.

[0017] As an optimized solution, a limit plate is fixedly provided on the inner side of the slide groove, and the wedge surface on the other side of the wedge block abuts against the limit plate. The wedge block is provided with a hexagon socket screw for driving it to rise and fall vertically.

[0018] As an optimized solution, two limit nuts are provided for each expansion body, and are located at the upper and lower sides of the expansion body.

[0019] As an optimized solution, corresponding light holes are arranged between the upper clamping plate and the lower clamping plate, and pull rods are inserted through the light holes on the same axis.

[0020] As an optimized solution, the lower end of the pull rod is fitted with a gasket and is threadedly connected to a lower nut that abuts against the lower clamping plate; the upper end of the pull rod is sequentially fitted with a gasket and a disc spring from bottom to top, and is threadedly connected to an upper nut that abuts against the upper clamping plate.

[0021] As an optimized solution, the upper clamping plate and the upper positioning ring are positioned by positioning pins and fastened by hexagon socket screws and T-nuts.

[0022] As an optimized solution, the lower clamping plate and the lower locating ring are positioned by locating pins and fastened by hexagon socket screws and T-nuts.

[0023] As an optimized solution, the lower end of the threaded mandrel is fixed to the center position of the lower clamping plate by a hexagon socket screw.

[0024] As an optimized solution, the upper clamping plate and the lower clamping plate are evenly processed with 4 T-slots and 4 groups of pin holes, and T-nuts and positioning pins are installed respectively. The T-slots extend radially, and the pin holes are distributed radially.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] 1. The upper clamping plate and the lower clamping plate of the present invention are provided with 4 groups of pin holes and 4 T-shaped slots, which can be equipped with positioning rings of different sizes as needed to achieve the positioning of workpieces of different sizes;

[0027] 2. The limiting nut in the present invention cooperates with the threaded mandrel to fix the inner support assembly at any position, which greatly improves the versatility;

[0028] 3. The inner support assembly of the present invention can be made into different expansion plates according to different products. Since the wedge block works independently, it can realize the expansion of the same size and different sizes, and is applicable to a wider range of working conditions and has stronger versatility;

[0029] 4. In the present invention, the combined use of the whole set of clamps can realize the universal use of products with any diameter, any height, different expansion and the same expansion within the range of the clamps. Because of its flexible and precise adjustment, it can meet the working conditions of electron beam welding, and can also be used for anti-deformation support of heat treatment of thin-walled cylinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0031] Figure 1 It is a schematic diagram of the structure of the utility model;

[0032] Figure 2 It is a schematic diagram of the structure after the utility model is assembled with a workpiece;

[0033] Figure 3 This is a schematic diagram of the structure of the lower clamping assembly of the utility model;

[0034] Figure 4 It is a structural schematic diagram of the upper clamping assembly of the utility model;

[0035] Figure 5 It is a structural schematic diagram of the inner support assembly of the utility model.

[0036] In the figure: 1-upper clamping assembly; 2-lower clamping assembly; 3-inner support assembly; 4-workpiece; 5-lower clamping plate; 6-lower positioning ring; 7-threaded mandrel; 8-T-slot; 9-pin hole; 10-locating pin; 11-T-nut; 12-bright hole; 13-upper clamping plate; 14-upper positioning ring; 15-expansion body; 16-expansion plate; 17-expansion rod; 18-wedge block; 19-limiting plate; 20-pull rod; 21-lower nut; 22-disc spring; 23-upper nut. DETAILED DESCRIPTION

[0037] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0038] like Figures 1 to 5 As shown, the workpiece welding device comprises an upper clamping assembly 1 and a lower clamping assembly 2 which are coaxially arranged from top to bottom, and an inner support assembly 3 which is telescopic in the radial direction is arranged between the upper clamping assembly 1 and the lower clamping assembly 2.

[0039] The position of the inner support assembly 3 is adjusted vertically by a height adjustment assembly.

[0040] The upper clamping assembly 1 comprises an upper clamping disc 13 , and an upper positioning ring 14 is fixed to the lower surface of the upper clamping disc 13 .

[0041] The lower clamping assembly 2 comprises a lower clamping plate 5 , and a lower positioning ring 6 is fixed to the upper surface of the lower clamping plate 5 .

[0042] The height adjustment assembly includes a threaded spindle 7 fixed on the lower clamping plate 5 , and a limit nut is threadedly connected on the threaded spindle 7 corresponding to the inner support assembly 3 .

[0043] The inner support assembly 3 includes an expansion body 15, and a plurality of expansion plates 16 are arranged around the expansion body 15 along the circumference. Each expansion plate 16 slides independently along the radial direction to adjust its position.

[0044] A through hole is provided at the center of the expansion body 15 to allow the threaded core shaft 7 to pass through.

[0045] The number of expansion plates 16 is eight.

[0046] The expansion body 15 is provided with a slide groove corresponding to each expansion plate 16, and an expansion rod 17 is slidably arranged in the slide groove. The expansion plate 16 is fixed on the outer end of the expansion rod 17, and a wedge block 18 moves vertically in the slide groove. The inner end of the expansion rod 17 abuts against a wedge surface of one side of the wedge block 18.

[0047] A limit plate 19 is fixedly provided on the inner side of the slide groove, and the wedge surface on the other side of the wedge block 18 abuts against the limit plate 19. The wedge block 18 is provided with a hexagon socket screw for driving it to rise and fall vertically.

[0048] Two limiting nuts are provided for each expansion body 15 , and are located at the upper and lower sides of the expansion body 15 .

[0049] Corresponding light holes 12 are arranged between the upper clamping disc 13 and the lower clamping disc 5 , and a pull rod 20 is inserted through the light holes 12 on the same axis.

[0050] The lower end of the pull rod 20 is fitted with a gasket and is threadedly connected to a lower nut 21 that abuts against the lower clamping plate 5; the upper end of the pull rod 20 is sequentially fitted with a gasket and a disc spring 22 from bottom to top, and is threadedly connected to an upper nut 23 that abuts against the upper clamping plate 13.

[0051] The upper clamping plate 13 and the upper positioning ring 14 are positioned by positioning pins 10 and fastened by hexagon socket screws and T-shaped nuts 11 .

[0052] The lower clamping plate 5 and the lower positioning ring 6 are positioned by positioning pins 10 and fastened by hexagon socket screws and T-nuts 11 .

[0053] The lower end of the threaded mandrel 7 is fixed to the center position of the lower clamping plate 5 by means of a hexagon socket screw.

[0054] The upper clamping plate 13 and the lower clamping plate 5 are respectively evenly processed with four T-shaped slots 8 and four groups of pin holes 9, and T-shaped nuts 11 and positioning pins 10 are respectively installed. The T-shaped slots 8 extend radially, and the pin holes 9 are distributed radially.

[0055] The working principle of this device is:

[0056] When in use, first place the lower clamping assembly 2 horizontally, and the lower positioning ring 6 needs to be selected according to the corresponding product and fixed on the lower clamping plate 5;

[0057] Install the limit nut and adjust it to the appropriate height, install the inner support assembly 3, the quantity is determined according to the product weld, the expansion plate 16 is selected according to the product, and install and expand other inner support devices (if there are multiple groups, assemble them in sequence);

[0058] Install workpiece 4 and confirm that workpiece 4 and the positioning ring are effective;

[0059] Adjust the hexagon socket screw to drive the wedge 18 downward, the expansion rod 17 to move outward, and at the same time drive the expansion plate 16 to move outward until the workpiece 4 is expanded. The 8 expansion positions can be expanded to different distances as needed;

[0060] Install the upper clamping assembly 1, and the upper positioning ring 14 needs to be selected according to the corresponding product and fixed on the upper clamping plate 13;

[0061] Rotate the upper clamping plate 13 to align it with the light hole 12 of the lower clamping plate 5, insert the pull rod 20, put the gasket on the lower end and screw it into the lower nut 21, put the gasket on the upper end, then put the disc spring 22, and tighten the upper nut 23 until the disc spring 22 is completely flattened;

[0062] The above fixture can realize the positioning, expansion and compensation of the workpiece 4 during axial contraction, thereby ensuring the welding quality.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. Workpiece welding device, characterized in that: The invention comprises an upper clamping assembly (1) and a lower clamping assembly (2) which are coaxially arranged from top to bottom, and an inner support assembly (3) which is telescopic in the radial direction is arranged between the upper clamping assembly (1) and the lower clamping assembly (2). The position of the inner support assembly (3) is adjusted vertically by a height adjustment assembly. The height adjustment assembly comprises a threaded spindle (7) fixed on the lower clamping plate (5), and a limit nut is threadedly connected on the threaded spindle (7) corresponding to the inner support assembly (3).

2. The workpiece welding device according to claim 1, characterized in that: The upper clamping assembly (1) comprises an upper clamping disc (13), and an upper positioning ring (14) is fixed to the lower surface of the upper clamping disc (13).

3. The workpiece welding device according to claim 2, characterized in that: The lower clamping assembly (2) comprises a lower clamping plate (5), and a lower positioning ring (6) is fixed on the upper surface of the lower clamping plate (5).

4. The workpiece welding device according to claim 1, characterized in that: The inner support assembly (3) comprises an expansion body (15), and the expansion body (15) is provided with a plurality of expansion plates (16) along the circumference, and each expansion plate (16) independently slides along the radial direction to adjust its position.

5. The workpiece welding device according to claim 4, characterized in that: The expansion body (15) is provided with a slide groove corresponding to each expansion plate (16), and an expansion rod (17) is slidably arranged in the slide groove. The expansion plate (16) is fixed on the outer end of the expansion rod (17), and a wedge block (18) is vertically movable in the slide groove, and the inner end of the expansion rod (17) is against a wedge surface on one side of the wedge block (18).

6. The workpiece welding device according to claim 5, characterized in that: A limit plate (19) is fixedly provided on the inner side of the slide groove, and the wedge surface on the other side of the wedge block (18) abuts against the limit plate (19). The wedge block (18) is provided with a hexagon socket screw for driving it to rise and fall vertically.

7. The workpiece welding device according to claim 4, characterized in that: Two limit nuts are provided corresponding to each expansion body (15), and are located at the upper and lower sides of the expansion body (15).

8. The workpiece welding device according to claim 3, characterized in that: Corresponding light holes (12) are arranged between the upper clamping disk (13) and the lower clamping disk (5), and a pull rod (20) is inserted through the light holes (12) on the same axis.

9. The workpiece welding device according to claim 8, characterized in that: The lower end of the pull rod (20) is sleeved with a gasket and is threadedly connected with a lower nut (21) that abuts against the lower clamping plate (5); The upper end of the pull rod (20) is sequentially covered with a gasket and a disc spring (22) from bottom to top, and is threadedly connected with an upper nut (23) that abuts against the upper clamping disk (13).

10. The workpiece welding device according to claim 3, characterized in that: The upper clamping plate (13) and the upper positioning ring (14) are positioned by a positioning pin (10) and fastened by a hexagon socket screw and a T-shaped nut (11); the lower clamping plate (5) and the lower positioning ring (6) are positioned by a positioning pin (10) and fastened by a hexagon socket screw and a T-shaped nut (11); the upper clamping plate (13) and the lower clamping plate (5) are respectively evenly processed with four T-shaped grooves (8), four groups of pin holes (9), and T-shaped nuts (11) and positioning pins (10) are respectively installed; the T-shaped grooves (8) extend radially, and the pin holes (9) are arranged in a radial distribution.

Images