Brazing expansion tool for large-diameter thin-wall barrel corrugated pipe

Abstract

The utility model discloses a brazing expansion tool for a large-diameter thin-wall barrel corrugated pipe. Comprising a built-in lining plate (4), an inner cavity of the built-in lining plate (4) is sequentially provided with more than one group of expanding assemblies from bottom to top in the axial direction, and every two adjacent expanding assemblies are separated through height supporting columns (6) arranged in the circumferential direction; the expanding assembly comprises a pair of arc-shaped tight supporting blocks (7), and the outer side faces of the two arc-shaped tight supporting blocks (7) abut against the inner cavity wall of the built-in lining plate (4). A pair of wedge-shaped tight supporting strips (8) are symmetrically arranged between the two arc-shaped tight supporting blocks (7), limiting faces (9) are arranged in the middles of the inner side faces of the arc-shaped tight supporting blocks (7), and a fixed-size supporting rod (10) is arranged between the limiting faces (9) of the two arc-shaped tight supporting blocks (7). The device is light in weight, convenient to assemble and disassemble and stable and reliable in quality.

Description

TECHNICAL FIELD

[0001] The utility model belongs to welding and sheet metal forming technical field, concretely relates to a big diameter thin wall cylinder bellows brazing expansion tool. BACKGROUND

[0002] The expansion of big diameter thin wall cylinder parts generally adopts screw rod tensioning support structure, machine tool three jaw structure or wedge-shaped tire support structure, but these structures have thread structure or large plane contact between tire supports, which can be normally used at normal temperature, but can easily cause metal diffusion connection during high temperature type correction process or vacuum brazing process, and affect normal disassembly of the tool. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a big diameter thin wall cylinder bellows brazing expansion tool.

[0004] The utility model is light in weight, convenient to assemble and disassemble, and stable and reliable in quality.

[0005] The technical scheme of the utility model is: a big diameter thin wall cylinder bellows brazing expansion tool, including built-in lining plate, a group of above expansion assemblies are sequentially arranged in the built-in lining plate inner cavity along the axial direction from bottom to top, and the adjacent two expansion assemblies are separated by the height support column arranged along the circumferential direction; the expansion assembly includes a pair of arc-shaped support blocks, the outer side surfaces of the two arc-shaped support blocks abut against the inner cavity wall of the built-in lining plate; a pair of wedge-shaped support strips is symmetrically arranged between the two arc-shaped support blocks, the middle part of the inner side surface of the arc-shaped support block is provided with a limiting surface, and the limiting surfaces between the two arc-shaped support blocks are provided with a size support rod.

[0006] In the foregoing big diameter thin wall cylinder bellows brazing expansion tool, a pair of cylindrical guide rods is also symmetrically arranged between the two arc-shaped support blocks, and the cylindrical guide rods are parallel to the wedge-shaped support strips.

[0007] In the foregoing big diameter thin wall cylinder bellows brazing expansion tool, a telescopic expansion rod is further included, which is used for supporting the two arc-shaped support blocks to facilitate the placement of the size support rod.

[0008] In the foregoing big diameter thin wall cylinder bellows brazing expansion tool, the expansion rod includes an adjusting sleeve, support rods are screw-connected to the two ends of the adjusting sleeve, and a limiting block is rotationally connected to the end of the support rod; the limiting block is connected with the arc-shaped support block.

[0009] In the foregoing big diameter thin wall cylinder bellows brazing expansion tool, the adjacent two expansion assemblies are cross arranged.

[0010] In the foregoing big diameter thin wall cylinder bellows brazing expansion tool, the expansion tool is placed on a transfer tray.

[0011] The utility model has the advantages that:

[0012] The utility model discloses light weight, convenient assembly and disassembly, stable and reliable quality can satisfy the demand of batch production large diameter thin wall cylinder bellows brazing tool (or large diameter thin wall piece high temperature hot type). BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the physical schematic diagram of the product to be processed of the utility model;

[0014] Figure 2 It is the use schematic diagram of the utility model;

[0015] Figure 3 It is the structural schematic diagram of the utility model;

[0016] Figure 4 It is the schematic diagram of removing the inner lining of the utility model;

[0017] Figure 5 It is the schematic diagram of laying the second layer;

[0018] Figure 6 It is the position schematic diagram of wedge-shaped tensioning strip and dimensioning support rod;

[0019] Figure 7 It is the position schematic diagram of tensioning rod;

[0020] Figure 8 It is the structural schematic diagram of tensioning rod. DETAILED DESCRIPTION

[0021] The utility model will be further described below in combination with the drawings and examples, but not as the basis for limiting the utility model.

[0022] Example 1. A large diameter thin wall cylinder bellows brazing expansion tool, see Figures 1-8 , including built-in lining plate 4, built-in lining plate 4 inner cavity is along the axial direction from below to above in turn is equipped with more than a group of expansion assembly, two adjacent expansion assembly is separated through the height support column 6 along the circumferential direction arrangement;The expansion assembly includes a pair of arc-shaped tensioning block 7, two arc-shaped tensioning block 7 outer side and built-in lining plate 4 inner cavity wall abut;Two arc-shaped tensioning block 7 between symmetrically set up a pair of wedge-shaped tensioning strip 8, the inner side surface of arc-shaped tensioning block 7 middle part is equipped with limit surface 9, and the limit surface 9 between two arc-shaped tensioning block 7 is equipped with dimensioning support rod 10.

[0023] Two aforementioned arc-shaped tensioning block 7 between symmetrically also set up a pair of cylindrical guide rod 11, and the cylindrical guide rod 11 is parallel with wedge-shaped tensioning strip 8.

[0024] Still include the telescopic tensioning rod 12, for straining two arc-shaped tensioning block 7, so as to place dimensioning support rod 10.

[0025] The aforementioned tensioning rod 12 comprises an adjusting sleeve 12-3, support rods 12-2 are screwed at both ends of the adjusting sleeve 12-3, and limit blocks 12-1 are rotationally connected to the end of the support rods 12-2; the limit blocks 12-1 are connected with the arc-shaped supporting blocks 7.

[0026] The two adjacent expansion assemblies are arranged in cross.

[0027] The expansion tool is placed on the transfer tray 3, and the transfer tray 3 is provided with a tray handle 5.

[0028] Figure 1 It is a physical schematic diagram of a product to be processed, comprising a cylinder body 1 and a corrugated pipe 2, the two are positioned by using a spot welding process, and brazing filler metal is pre-placed.

[0029] The tool assembly sequence is as follows:

[0030] The first layer: the product is placed on the transfer tray 3, the internal assembly of the product is provided with an internal lining plate 4, eight pieces of height support columns 6 are assembled, two arc-shaped supporting blocks 7 are assembled in pairs, two cylindrical guide rods 11 are assembled, the two arc-shaped supporting blocks are expanded by rotating the adjusting sleeve 12-3 of the expansion rod 12, both sides of the wedge-shaped supporting strips 8 and the fixed size supporting rods 10 are assembled, and then the expansion rod 12 and the two cylindrical guide rods 11 are removed.

[0031] The second layer: eight pieces of height support columns 6 are assembled, two arc-shaped supporting blocks 7 are assembled in pairs, the arc-shaped supporting blocks are assembled in a staggered 90-degree position, two cylindrical guide rods 11 are assembled, the two arc-shaped supporting blocks are expanded by rotating the adjusting sleeve 12-3 of the expansion rod 12, both sides of the wedge-shaped supporting strips 8 and the fixed size supporting rods 10 are assembled, and then the expansion rod 12 and the two cylindrical guide rods 11 are removed.

[0032] The second layer content is repeated until four layers of assembly are completed.

[0033] The arc-shaped supporting blocks and the fixed size supporting rods arranged in multiple layers ensure the size of the cylinder body.

[0034] The two adjacent arc-shaped supporting blocks are arranged in a staggered 90-degree manner, so that the roundness of the expansion core body is improved.

[0035] After the two arc-shaped supporting blocks are assembled in the cylinder body, the fixed size supporting rods are assembled after being expanded by the expansion rod.

[0036] The two arc-shaped supporting blocks are expanded by the two pre-assembled cylindrical guide rods on both sides, so that the positions of the two arc-shaped supporting blocks are aligned.

[0037] The utility model discloses two sides of the relative two support blocks are arranged with wedge-shaped supporting strips, avoiding high temperature deformation of both sides during long-term use.

[0038] The utility model discloses the built-in lining board avoids the multilayer arc supporting block to the cylinder and produces the indentation when the cylinder is raised or is corrected.

[0039] The utility model discloses the support column is supported between the layer of arc supporting block, avoids the displacement change of arc supporting block along the height direction when high temperature.

[0040] The utility model discloses the tray is supported to the tooling and product, and the convenient transfer and the furnace operation of going in.

Claims

1. A brazing expansion tooling for a large-diameter thin-walled cylindrical corrugated pipe, characterized in that, The device includes an internal liner (4), and the internal cavity of the internal liner (4) is provided with one or more expansion components in sequence from bottom to top along the axial direction. Adjacent expansion components are separated by height support columns (6) arranged circumferentially. The expansion components include a pair of arc-shaped support blocks (7), the outer sides of the two arc-shaped support blocks (7) abut against the inner wall of the internal cavity of the internal liner (4). A pair of wedge-shaped support strips (8) are symmetrically arranged between the two arc-shaped support blocks (7). A limiting surface (9) is provided in the middle of the inner side of the arc-shaped support block (7). A fixed-size support rod (10) is provided between the limiting surfaces (9) of the two arc-shaped support blocks (7).

2. The brazing expansion tooling for large-diameter thin-walled cylindrical corrugated pipes according to claim 1, characterized in that, A pair of cylindrical guide rods (11) are symmetrically provided between the two arc-shaped support blocks (7), and the cylindrical guide rods (11) are parallel to the wedge-shaped support strips (8).

3. The brazing expansion tooling for large-diameter thin-walled cylindrical corrugated pipes according to claim 1, characterized in that, It also includes a telescopic tension rod (12) for opening the two arc-shaped tension blocks (7) to facilitate the placement of a fixed-size support rod (10).

4. The brazing expansion tooling for large-diameter thin-walled cylindrical corrugated pipes according to claim 3, characterized in that, The tensioning rod (12) includes an adjusting screw sleeve (12-3), and a support rod (12-2) is screwed to both ends of the adjusting screw sleeve (12-3). The end of the support rod (12-2) is rotatably connected to a limit block (12-1); the limit block (12-1) is connected to the arc-shaped tensioning block (7).

5. The brazing expansion tooling for large-diameter thin-walled cylindrical corrugated pipes according to claim 1, characterized in that, The adjacent expansion components are arranged in a cross pattern.

6. The brazing expansion tooling for large-diameter thin-walled cylindrical corrugated pipes according to claim 1, characterized in that, The expansion fixture is placed on the transfer pallet (3).

Images