CN218657575U - Positioning welding fixture for installing support block on arc cover - Google Patents

Abstract

The utility model provides a positioning welding fixture for installing a support block on an arc cover, which comprises a fixed seat, an arc positioning plate, a pressing plate, a high positioning block, a low positioning block, a threaded pin and a mistake proofing pin; two arc locating plates are used for positioning the arc cover, a high locating block and a low locating block are respectively used for installing a first installation supporting block and a second installation supporting block, the pressing plate is used for pressing the arc cover assembled on the arc locating plates, the mistake-proofing pin is used for controlling the installation direction of the arc cover, the fact that the distance from the first installation supporting block and the second installation supporting block to the center line n of the arc cover is correct is ensured, and the threaded pin is used for pressing the high locating block and the first installation supporting block as well as the low locating block and the second installation supporting block. The utility model is simple in operation, the equipment is convenient, and the location is accurate, can effectively prevent to assemble the size and the position degree mistake that the direction dislocation leads to.

Description

Positioning welding fixture for installing support block on arc cover

Technical Field

The utility model belongs to the technical field of the welding frock, a location frock when aviation machinery product heat exchanger installation prop up piece and heat exchanger arc lid welding is related to, especially a welding position frock of unequal height, asymmetric installation prop up piece.

Background

The newly developed heat exchanger is an accessory of an aircraft environmental control system, and a heat exchanger arc cover and an installation support block assembly (hereinafter referred to as an arc cover installation support block assembly) of the heat exchanger are important assemblies of a product heat exchanger, as shown in fig. 7 to 9, and comprise an arc cover 201 (as shown in fig. 1 to 3), a first installation support block 202 and a second installation support block 203 (as shown in fig. 4 to 6), which are references of manufacturing and installing of a whole product, a surface a of the first installation support block 202 and a surface B of the second installation support block 203 are not on the same plane, and have a difference of a distance H, and the positions of the first installation support block 202 and the second installation support block 203 are asymmetric to a central line n of the arc cover 201. In the manufacturing of arc lid 201 and installation brace piece subassembly, its manufacturing quality directly influences the processing requirement of the back process of product, for guaranteeing back process processing requirement, when welding this subassembly, not only the position degree of four installation brace pieces (2 first installation brace pieces 202 and 2 second installation brace pieces 203) is not more than 1mm, and each installation brace piece position can not have the wrong of left and right welding in addition.

Compared with the installation standard of the prior similar heat exchanger product, the heat exchanger has the characteristics that:

(1) The surfaces A and B of the four mounting support blocks are not on the same plane;

(2) The position of the mounting support block is asymmetrical to the center line n of the arc-shaped cover 201.

Based on above-mentioned characteristics, in the product development in the past, the installation has appeared that a face of a prop block is higher than B face and has been less than B face for the face A or size M is less than size K and has wrongly welded the condition that is greater than K for M, and its reason is mainly that this arc lid 201 and installation prop block subassembly are in welding process, and the orientation is placed and is reversed to lead to when positioning because of its arc lid 201 welding.

Disclosure of Invention

The utility model aims at providing a fixed-position welding anchor clamps of installation prop up piece is covered to the arc to reach accurate positioning, mistake proofing, compress tightly the effect of product part, the operating personnel of being convenient for welds arc lid and installation prop up the piece correctly.

The utility model discloses a realize through following technical scheme:

a positioning welding fixture for an installation support block on an arc cover, wherein the arc cover comprises an arc surface C, the central line of the arc surface is n, the installation support block consists of a first installation support block and a second installation support block, both the first installation support block and the second installation support block are provided with installation holes and installation groove edges, an installation surface A on the first installation support block and an installation surface B on the second installation support block are not on the same plane, the distance M from the first installation support block to the central line n is not equal to the distance K from the second installation support block to the central line n, the positioning welding fixture comprises,

a fixed seat;

the two arc positioning plates are arranged on the upper end face of the fixed seat at intervals, an arc surface is arranged on each arc positioning plate, and the curvature radius of each arc surface is equal to that of the arc surface C on the arc cover;

the pressing plate is positioned above the two arc-shaped positioning plates and stretches across the two arc-shaped positioning plates simultaneously, two ends of the pressing plate are connected with the upper end face of the fixed seat through screws, and butterfly nuts are connected to the screws in a threaded mode;

the two high positioning blocks are positioned between the two arc positioning plates and connected to the upper end surface of the fixing seat, the two high positioning blocks are separated at two sides of the pressing plate, and positioning surfaces and through holes are formed in the high positioning blocks;

the two short positioning blocks are positioned between the two arc positioning plates and connected to the upper end surface of the fixing seat, the two short positioning blocks are separated at two sides of the pressing plate, and positioning surfaces and through holes are formed in the short positioning blocks;

the threaded pin is inserted into the through holes in the high positioning block and the low positioning block and then is in threaded connection with the hexagonal flange nut;

and the two error-proof pins are arranged at the same side of the same arc-shaped positioning plate, one end of each error-proof pin is connected to the upper end surface of the fixing seat, and the vertical distance from the connecting line of the two error-proof pins to the connecting line of the two high positioning blocks is equal to the vertical distance from the end surface of the arc-shaped cover to the central line n minus the distance M, or the vertical distance from the connecting line of the two error-proof pins to the connecting line of the two low positioning blocks is equal to the vertical distance from the end surface of the arc-shaped cover to the central line n plus the distance K.

Furthermore, the arc-shaped positioning plate, the high positioning block and the low positioning block are connected with the upper end face of the fixing seat through pins and screws.

Further, the width of the high positioning block and the width of the low positioning block are smaller than the width of the edge of the mounting groove on the second mounting support block and the first mounting support block.

Furthermore, only one positioning surface is arranged on the high positioning block, the positioning surface corresponds to the surface with the mounting hole on the second mounting support block, only one positioning surface is arranged on the low positioning block, and the positioning surface corresponds to the surface with the mounting hole on the first mounting support block.

Compared with the prior art, the utility model discloses a fixed-position welding anchor clamps of installation supporting block on arc lid fixes a position, mistake proofing and compresses tightly the arc lid through setting up arc lid installation supporting block mistake proofing location compact structure, realizes fixing a position and compressing tightly the installation supporting block simultaneously, has guaranteed the relative position degree of arc lid and installation supporting block, thereby has guaranteed the uniqueness of arc lid installation, prevents the risk of dress mistake, lets the operator operate at ease, can not assemble the mistake, weld the mistake, has satisfied product welding precision requirement and position requirement; because the arc-shaped cover mounting support block mistake-proofing positioning and pressing structure adopts an assembly type structural design, the structure of the clamp is simplified, only simple turning, milling, clamping and grinding are needed, and meanwhile, materials are saved, so that the cost of the clamp is reduced; the clamp has the advantages of exquisite structure, convenience in use and high working efficiency.

Drawings

FIG. 1 is a schematic view of an arcuate cover;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a schematic structural view of a second mounting brace;

FIG. 5 is a left side view of FIG. 4;

FIG. 6 is a top view of FIG. 4;

FIG. 7 is a schematic structural view of an arc cover mounting support block after welding;

FIG. 8 is a left side view of FIG. 7;

FIG. 9 is a top view of FIG. 7;

FIG. 10 is a schematic view of a tack welding fixture;

FIG. 11 is a left side view of FIG. 10;

FIG. 12 is a top view of FIG. 10;

FIG. 13 is a schematic view of a high alignment block;

FIG. 14 is a bottom view of FIG. 13;

FIG. 15 isbase:Sub>A cross-sectional view taken along section A-A of FIG. 14;

FIG. 16 is a schematic view of a threaded pin configuration;

FIG. 17 is a schematic view of an arc positioning plate;

FIG. 18 is a schematic view of a short positioning block;

FIG. 19 is a bottom view of FIG. 18;

FIG. 20 isbase:Sub>A cross-sectional view taken along section A-A of FIG. 19;

FIG. 21 is a schematic view of a first mounting brace;

FIG. 22 is a top view of FIG. 21;

FIG. 23 is a left side view of FIG. 21;

in the figure: 101-threaded pin, 102-hexagonal flange nut, 103-arc positioning plate, 104-fixed seat, 105-pressing plate, 106-screw rod, 107-error-proof pin, 108-high positioning block, 109-low positioning block, 2-butterfly nut, 3-pin, 4-screw, 201-arc cover, 202-first mounting support block, 203-second mounting support block.

Detailed Description

The embodiments of the present invention will be further described with reference to the drawings attached to the specification, but the scope of the claims of the present invention is not limited to the contents listed in the examples.

As shown in fig. 10, the utility model discloses a fixed-position welding anchor clamps of installation prop piece are covered to arc includes threaded pin 101, hexagonal flange nut 102, arc locating plate 103, fixing base 104, clamp plate 105, screw rod 106, mistake proofing round pin 107, high locating piece 108, short locating piece 109, butterfly nut 2, round pin 3 and screw 4.

The fixing seat 104 is a plate with a certain thickness and serves as an installation base, the arc-shaped positioning plate 103 (figure 17) and the high positioning block 108 and the low positioning block 109 are assembled on the upper end face of the fixing seat 104 through the pins 3 and the screws 4, the arc-shaped positioning plate 103 is adjusted according to figures 10-12, and the high positioning block 108, the low positioning block 109 and the fixing seat 104 are fixed through the screws 4 and the pins 3 after relative positions of the high positioning block 108, the low positioning block 109 and the fixing seat 104 are adjusted; the screw 106 and the error-proof pin 107 are assembled on the fixed seat 104 after the relative positions are adjusted according to the figure 12; the clamp plate 105 is a linear plate, notches are formed in two ends of the plate, the clamp plate is assembled at the upper ends of the two threaded rods 106 through the notches, and the butterfly nut 2 is matched to compress the arc-shaped cover 201. Specifically, as shown in fig. 12, the two arc positioning plates 103 are arranged in parallel at intervals, and both are parallel to the center line n of the arc cover 201, the pressing plate 105 is perpendicular to the center line n and spans the two arc positioning plates 103, the two screws 106 are fixed on the outer sides of the two arc positioning plates 103 (the area between the two arc positioning plates 103 is the inner side), and the two high positioning blocks 108 and the two low positioning blocks 109 are respectively disposed on both sides of the pressing plate 105. Two error-proof pins 107 are respectively arranged at two sides of the pressure plate 105 and are positioned at the outer side of the same arc-shaped positioning plate 103, when the arc-shaped cover 201 is correctly installed and the end surface is tightly attached to the two error-proof pins 107, the vertical distance from the connecting line of the two error-proof pins 107 (namely the end surface of the arc-shaped cover 201) to the connecting line of the two high positioning blocks 108 is just equal to the distance from the central line n to the end surface of the arc-shaped cover 201 minus the distance M. Through holes are formed in the high positioning block 108 and the low positioning block 109 and used for inserting the threaded pins 101 (fig. 16) and locking the high positioning block 108, the low positioning block 109, the first mounting support block 202 and the second mounting support block 203 by matching with the hexagonal flange nut 102.

Fig. 13 to 15 and 18 to 20 are schematic structural views of the tall positioning block 108 and the short positioning block 109, respectively.

The position of the arc-shaped cover 201 is located by the arc-shaped surface on the arc-shaped locating plate 103, that is, the arc-shaped surface in fig. 17 is located corresponding to the arc-shaped surface C in fig. 2, the two error-preventing pins 107 prevent the arc-shaped cover 201 from being installed in the left and right directions (that is, the left and right directions in fig. 3, which may cause the distance M and the distance K to be mistaken), because the distance between the connecting line of the two error-preventing pins 107 and the connecting line of the two high locating blocks 108 is determined, and the distance M is subtracted from the distance from the central line n to the end surface of the arc-shaped cover 201, if the arc-shaped cover 201 is installed in the opposite direction, the first installing support block 202 and the low locating block 109, and the second installing support block 203 and the high locating block 108 are simultaneously dislocated, so that an operator may obviously see the dislocation with naked eyes, and the lower plane of the pressing plate 105 is used for pressing the mouth (i.e., the recessed face) of the arc-shaped cover 201 to keep the mouth horizontal; the first mounting support 202 and the second mounting support 203 are mounted on the short positioning block 109 and the high positioning block 108, respectively.

As shown in fig. 4 to 6, 21 to 23, and 7 to 9, the second mounting leg 203 has a surface serving as a positioning surface, which has mounting holes, and mounting groove sides (corresponding to the M1 plane and the M2 plane in fig. 7) on both sides, and similarly, the first mounting leg 202 has a surface serving as a positioning surface, which has mounting holes, and mounting groove sides (corresponding to the M1 plane and the M2 plane in fig. 7) on both sides.

Taking the first mounting support 202 as an example, as shown in fig. 7, the first mounting support 202 has an M3 surface that can be used as a positioning surface, and two mounting groove edges correspond to two side surfaces, that is, an M1 surface and an M2 surface, when the first mounting support 202 is mounted on the short positioning block 109, the M3 surface of the first mounting support 202 is tightly attached to the positioning surface Q of the short positioning block 109, so as to ensure that a gap between the M1 surface and the M2 surface of the first mounting support 202 and a single end surface at two ends in the width L direction of the short positioning block 109 is not greater than 0.2mm (i.e., a gap between the M1 surface and the M2 surface to the upper end surface and the lower end surface of the dimension L in fig. 19), and then the threaded pin 101 is inserted into the mounting hole in the M3 surface and is fastened to the short positioning block 109 by using the hexagonal flange nut 102, so as to ensure that the M3 surface is tightly attached to the positioning surface W of the short positioning block 109, thereby ensuring the height of the first mounting support 202. Similarly, the installation of the second installation support block 203 and the high positioning block 108 is the same as the above process, it is ensured that the positioning surface W of the high positioning block 108 is tightly attached to the M3 surface of the second installation support block 203, the single-side gap between the M1 surface and the M2 surface of the second installation support block 203 and the end surfaces of the two ends in the width H direction of the high positioning block 108 is not more than 0.2mm (i.e. the gap between the M1 surface and the M2 surface to the upper and lower end surfaces of the size H in fig. 14), and finally the height difference H between the a surface and the B surface is ensured, thereby ensuring the clamping accuracy and position requirements of the first installation support block 202, the second installation support block 203 and the arc-shaped cover 201, and facilitating the welding.

During clamping, the opening of the arc cover 201 shown in fig. 2 is upward, and then the arc surface C is placed on the arc surface at the upper end of the arc positioning plate 103; the grooves of the first mounting support block 202 and the second mounting support block 203 are reversely buckled on the upper portions of the short positioning block 109 and the high positioning block 108 (the groove refers to the uppermost groove in fig. 4 and 21 and is formed by the edge of the mounting groove), and then are respectively compressed (the mounting support blocks are inserted into the mounting holes and the through holes through threaded pins 101 and are locked by being matched with hexagonal flange nuts 102, and the arc-shaped cover 201 is compressed by the butterfly nuts 2 and the pressure plate 105), specifically, the double-dot chain line in fig. 10 is shown, so that the positioning and clamping of the arc-shaped cover 201, the first mounting support block 202 and the second mounting support block 203 with the positioning and clamping device are completed. Finally, after the first mounting support block 202, the second mounting support block 203 and the arc-shaped cover 201 are welded in a positioning mode, the welded arc-shaped cover mounting support block assembly is detached from the device, and the welding can be completed by welding the positions without welding.

After all the tolerance is accumulated, the tolerance does not exceed 1/3 of the tolerance of the product, the position and dimension precision requirement of the product can be ensured, and the error-proof pin 107 is added to prevent the possibility of wrong assembly and welding of the product.

In the aspect of applicability, the device is simple in structure and ingenious in design, an operator can master the operation key through simple introduction, and the operator can feel at will.

Above-mentioned embodiment is not used for the restriction the utility model discloses a protection scope, the fan is in the utility model discloses a deformation, modification or equivalence replacement etc. that make on the technical scheme basis all should fall into the utility model discloses a protection scope.

Claims (4)

1. The utility model provides a positioning and welding anchor clamps of installation branch piece on arc lid, arc lid (201) contain an arc surface C, the central line of arc surface is n, the installation is propped up a piece and is become by first installation branch piece (202) and second installation branch piece (203), all have mounting hole and mounting groove limit on first installation branch piece (202) and the second installation branch piece (203), installation face A on first installation branch piece (202) is not in same plane with installation face B on second installation branch piece (203), and first installation branch piece (202) is not equal to second installation branch piece (203) to the distance K of central line n to distance M of central line n, its characterized in that: the positioning welding fixture comprises a positioning welding fixture and a positioning welding fixture,

a fixed seat (104);

the two arc positioning plates (103) are arranged on the upper end surface of the fixed seat (104) at intervals, an arc surface is arranged on each arc positioning plate (103), and the curvature radius of each arc surface is equal to that of the arc surface C on the arc cover (201);

the pressing plate (105) is positioned above the two arc-shaped positioning plates (103) and stretches across the two arc-shaped positioning plates (103), two ends of the pressing plate (105) are connected with the upper end face of the fixed seat (104) through a screw rod (106), and the screw rod (106) is in threaded connection with a butterfly nut (2);

the two high positioning blocks (108) are positioned between the two arc-shaped positioning plates (103) and connected to the upper end surface of the fixing seat (104), the two high positioning blocks (108) are respectively arranged at two sides of the pressing plate (105), and positioning surfaces and through holes are arranged on the high positioning blocks (108);

the two short positioning blocks (109) are positioned between the two arc-shaped positioning plates (103) and connected to the upper end face of the fixing seat (104), the two short positioning blocks (109) are respectively arranged at two sides of the pressing plate (105), and positioning faces and through holes are formed in the short positioning blocks (109);

the threaded pin (101) is inserted into through holes in the high positioning block (108) and the low positioning block (109) and then is in threaded connection with the hexagonal flange nut (102);

the anti-mistake device comprises error-proof pins (107), wherein the error-proof pins (107) are arranged on the same side of the same arc-shaped positioning plate (103), one end of each error-proof pin (107) is connected to the upper end face of the corresponding fixing seat (104), the perpendicular distance from the connecting line of the error-proof pins (107) to the connecting line of the two high positioning blocks (108) is equal to the perpendicular distance from the end face of the arc-shaped cover (201) to the center line n minus the distance M, or the perpendicular distance from the connecting line of the error-proof pins (107) to the connecting line of the two low positioning blocks (109) is equal to the perpendicular distance from the end face of the arc-shaped cover (201) to the center line n plus the distance K.

2. The tack welding fixture for mounting a support block on an arc cover of claim 1, wherein: the arc-shaped positioning plate (103), the high positioning block (108) and the low positioning block (109) are connected with the upper end face of the fixing seat (104) through pins (3) and screws (4).

3. The tack welding fixture for mounting a support block on an arc cover of claim 1, wherein: the widths of the high positioning block (108) and the low positioning block (109) are smaller than the widths of the mounting groove edges on the second mounting support block (203) and the first mounting support block (202).

4. The tack welding fixture for mounting a support block on an arc cover of claim 1, wherein: only one positioning surface is arranged on the high positioning block (108), the positioning surface corresponds to the surface with the mounting hole on the second mounting support block (203), only one positioning surface is arranged on the low positioning block (109), and the positioning surface corresponds to the surface with the mounting hole on the first mounting support block (202).

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