CN115519300A - Welding jig - Google Patents

Abstract

The invention belongs to the technical field of welding, and discloses a welding jig which comprises a base, a main body positioning mechanism, an accessory positioning mechanism and a protection mechanism, wherein the accessory positioning mechanism comprises a positioning frame capable of ascending and descending relative to the base, a positioning hole is formed in the positioning frame, two side walls opposite to the positioning hole extend downwards to form a positioning clamp, the positioning clamp can extend into an inner groove, and a precision accessory penetrates through the positioning hole and is placed into the inner groove along the two positioning clamps; the protection mechanism comprises a protection cylinder capable of lifting relative to the base, and the protection cylinder penetrates through the positioning hole and is pressed on the precision accessory. During welding, the main body is positioned on the base through the main body positioning mechanism, and the positioning frame of the accessory positioning mechanism is used for positioning the placement position of the precision accessory on the main body, so that the position of the precision accessory is accurate, the welding precision is improved, and the defects of welding spot deviation and low welding position precision are overcome. The protective cylinder can prevent welding slag generated in the welding process from splashing to an adjacent part, so that a main body is prevented from being burnt, and the product quality is ensured.

Description

Welding jig

Technical Field

The invention relates to the technical field of welding, in particular to a welding jig.

Background

The welding jig is a device for fixing a part to be welded and ensuring welding precision. For example, a precision lens fitting is welded on a product, the precision lens fitting is a sheet structure, an inner hole is arranged on the precision lens fitting in a penetrating manner, an inner groove is arranged on the product in a concave manner, and the precision lens fitting is arranged in the inner groove of the product.

When the existing welding jig is used for welding, welding points are prone to deviation, and therefore the accuracy of welding positions cannot be guaranteed; in addition, high-temperature welding slag generated in welding splashes around to burn out adjacent parts, and adverse effects are caused on products.

Therefore, a new welding jig is needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a welding jig which can improve welding precision and protect adjacent parts of welding positions from being damaged.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a welding jig, it includes main part and precision parts to wait to weld the work piece, be provided with the inside groove in the main part, precision parts place in the diapire of inside groove, just be provided with the accessory hole on the precision parts, the border in accessory hole is welding position, welding jig includes:

a base;

the main body positioning mechanism is used for positioning the placement position of the main body on the base;

the accessory positioning mechanism comprises a positioning frame capable of lifting relative to the base, a positioning hole is formed in the positioning frame, two side walls opposite to the positioning hole extend downwards to form positioning clamps, the positioning clamps can extend into the inner groove, and the precision accessory penetrates through the positioning hole and is placed into the inner groove along the two positioning clamps;

protection machanism, including relatively the protection section of thick bamboo of base liftable, a protection section of thick bamboo can pass the locating hole and compress tightly in precision parts, the hole of a protection section of thick bamboo with the coaxial setting in accessory hole, just the hole aperture of a protection section of thick bamboo is greater than the aperture in accessory hole.

As a preferable aspect of the welding jig provided by the present invention, the main body positioning mechanism includes:

the positioning device comprises at least two first positioning blocks, wherein the at least two first positioning blocks are arranged at intervals along the X direction;

and at least two second positioning blocks are arranged and are arranged at intervals along the Y direction.

As a preferable aspect of the welding jig provided in the present invention, the main body positioning mechanism further includes:

the first side pushing pieces are arranged at least two, the at least two first side pushing pieces are arranged at intervals along the X direction, and the main body is positioned between the first positioning block and the output end of the first side pushing piece;

the second side pushing pieces are arranged at least two, the second side pushing pieces are arranged at intervals in the Y direction, and the main body is located between the second positioning block and the output end of each second side pushing piece.

As a preferred embodiment of the welding jig provided by the present invention, the accessory positioning mechanism further includes:

the first vertical plate is fixedly arranged on the base;

the first linear driving part is arranged on the first vertical plate, and the positioning frame is positioned on one side, back to the first linear driving part, of the first vertical plate;

the connecting plate is arranged at the output end of the first linear driving piece;

the connecting rod vertically extends, the connecting plate transversely spans the first vertical plate and is connected with the connecting rod, and the positioning frame is connected to one end, far away from the connecting plate, of the connecting rod;

the first guide rail is arranged on one side, back to the first linear driving part, of the first vertical plate and extends vertically;

and the first sliding block is connected with the positioning frame and is in vertical slidable fit with the first guide rail.

As a preferable aspect of the welding jig provided by the present invention, the positioning frame includes:

the positioning hole is arranged in the positioning part;

the first cantilever is connected to the positioning part and extends horizontally;

the first installation part is perpendicularly connected to one end, far away from the positioning part, of the first cantilever, one end, far away from the connecting rod, of the connecting plate is provided with a first fixing frame, the first installation part is embedded in the first fixing frame, and the first sliding block is arranged on one side, facing the first vertical plate, of the first fixing frame.

As a preferred embodiment of the welding jig provided in the present invention, the protection mechanism further includes:

the second vertical plate is movably arranged on the base along the horizontal direction;

the second linear driving piece is arranged on the second vertical plate, and the output end of the second linear driving piece is connected with the protection cylinder;

a second guide rail vertically arranged on the second vertical plate,

and the second sliding block is connected with the protective cylinder and is in slidable fit with the second guide rail along the vertical direction.

As a preferred embodiment of the welding jig provided in the present invention, the protection mechanism further includes:

the output end of the third linear driving piece is connected with the second vertical plate;

the third guide rail is horizontally arranged on the base;

and the third sliding block is arranged at the bottom end of the second vertical plate and is in sliding fit with the third guide rail along the horizontal direction.

As a preferable aspect of the welding jig provided by the present invention, the protective cylinder includes:

the cylinder body can penetrate through the positioning hole and is tightly pressed on the precision accessory;

the second cantilever is connected to the cylinder;

the second installation department, connect in the second cantilever is kept away from the one end of barrel, the output of second linear driving spare is connected with the second mount, the second installation department inlay dress in the second mount, the second slider set up in on the second mount.

As a preferable scheme of the welding jig provided by the present invention, the base is provided with a plurality of suction cups for sucking the main body.

As a preferable scheme of the welding jig provided by the present invention, the base is provided with a plurality of support pads for supporting the main body.

The invention has the beneficial effects that:

the invention provides a welding jig, when welding a main body and a precision accessory, firstly loading the main body on a base, and positioning the placement position of the main body on the base through a main body positioning mechanism to ensure that the position of the main body is accurate and correct; after the main body is positioned, driving a positioning frame of the accessory positioning mechanism to descend relative to the base so that the positioning hole is opposite to the inner groove on the main body, and the positioning card extends into the inner groove and is used for guiding the installation of the precision accessory; after the to-be-positioned frame is lowered to the designated position, the precision part penetrates through the positioning hole and is placed into the inner groove in the main body along the two positioning clamps, the positioning frame is used for positioning the placement position of the precision part in the inner groove of the main body, and the two positioning clamps can play a limiting role in the process of placing the precision part downwards so as to prevent the precision part from deviating; after the precision parts are installed, the protection cylinder of the protection mechanism is driven to descend so that the protection cylinder penetrates through the positioning hole and is pressed on the precision parts, and then a welding head of a welding machine extends into the edge position of the part hole in the protection cylinder to weld until the welding is completed. On one hand, the protection cylinder can play a role in fixing the position of the precision part, and the precision part is prevented from generating position deviation in the welding process; on the other hand, the protective cylinder can prevent welding slag generated in the welding process from splashing to an adjacent part, so that the main body is prevented from being burnt, and the product quality is ensured. According to the invention, the main body positioning mechanism is used for positioning the placing position of the main body on the base, and then the positioning frame of the accessory positioning mechanism is used for positioning the placing position of the precision accessory on the main body, so that the precision of the position of the precision accessory is ensured, the welding precision is improved, and the defects of welding spot deviation and low welding position precision are overcome.

Drawings

FIG. 1 is an overall schematic view of a body and precision fitting provided by the present invention;

FIG. 2 is a partial schematic view (from above) of a body and precision fitting provided by the present invention;

fig. 3 is a first isometric view of a welding jig provided by an embodiment of the present invention (with the body installed);

FIG. 4 is a second isometric view of a welding jig provided by an embodiment of the present invention (with the body not installed);

FIG. 5 is a schematic view of the precision part provided by the present invention after positioning;

FIG. 6 is a schematic illustration of the protective cylinder provided by the present invention after it has been lowered into position;

FIG. 7 is an enlarged view of a portion of FIG. 3 at A;

FIG. 8 is a schematic structural view of an accessory positioning mechanism provided in accordance with an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a positioning frame according to an embodiment of the present invention;

FIG. 10 is a first structural schematic of a shield mechanism provided in accordance with an embodiment of the present invention;

FIG. 11 is a second structural schematic of a shield mechanism provided in accordance with an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a protective sleeve according to an embodiment of the present invention.

In the figure:

100. a main body; 200. precision fittings; 101. an inner tank; 201. an accessory hole; 300. welding spots;

1. a base; 2. a main body positioning mechanism; 3. an accessory positioning mechanism; 4. a protection mechanism;

11. a suction cup; 12. a support pad;

21. a first positioning block; 22. a second positioning block; 23. a first side pushing member; 24. a second side pushing member;

31. a positioning frame; 32. a first vertical plate; 33. a first linear drive; 34. a connecting plate; 35. a connecting rod; 36. a first guide rail; 37. a first slider; 38. a first fixing frame;

311. a positioning part; 312. a first cantilever; 313. a first mounting portion;

3111. positioning holes; 3112. positioning the card;

41. a protective cylinder; 42. a second vertical plate; 43. a second linear drive; 44. a second guide rail; 45. a second slider; 46. a third linear drive member; 47. a third guide rail; 48. a third slider; 49. installing a flat plate; 410. a set square; 420. a second fixing frame;

411. a barrel; 412. a second cantilever; 413. a second mounting portion.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 and 2, the workpiece to be welded includes a main body 100 and a precision part 200, the main body 100 is provided with an inner groove 101, the precision part 200 is placed on the bottom wall of the inner groove 101 for welding, a part hole 201 is provided on the precision part 200, the edge of the part hole 201 is a welding position, and as shown in fig. 2, a circle of welding points 300 is formed on the edge of the part hole 201.

The precision part 200 is a precision lens part, and has extremely high requirements on the accuracy of the welding position and the welding quality.

For solving the problems of low welding precision and easy splashing of welding slag to burn adjacent parts in the prior art, as shown in fig. 3 and 4, the embodiment provides a welding jig which comprises a base 1, a main body positioning mechanism 2, an accessory positioning mechanism 3 and a protection mechanism 4.

Referring to fig. 3 and 4, the base 1 is a flat plate for carrying the main body 100, and is also a mounting base for the main body positioning mechanism 2, the accessory positioning mechanism 3, and the protection mechanism 4. The main body positioning mechanism 2 is used for positioning the placement position of the main body 100 on the base 1 and ensuring the position of the main body 100 to be accurate; the accessory positioning mechanism 3 includes a positioning frame 31 capable of being lifted relative to the base 1, the positioning frame 31 is provided with a positioning hole 3111, specifically referring to fig. 9, two side walls opposite to the positioning hole 3111 extend downwards to form a positioning card 3112, the positioning frame 31 is driven to descend to enable the positioning card 3112 to extend into the inner groove 101, and the precision accessory 200 can pass through the positioning hole 3111 and be placed into the inner groove 101 along the two positioning cards 3112; referring to fig. 3 and 7, the protection mechanism 4 includes a protection cylinder 41 capable of being lifted relative to the base 1, the protection cylinder 41 is driven to descend to enable the protection cylinder 41 to pass through the positioning hole 3111 and to be pressed against the precision part 200, an inner hole of the protection cylinder 41 is coaxially disposed with the part hole 201, and an inner hole diameter of the protection cylinder 41 is larger than that of the part hole 201.

When the main body 100 and the precision part 200 are welded, firstly, the main body 100 is loaded on the base 1, and the placement position of the main body 100 on the base 1 is positioned through the main body positioning mechanism 2, so that the position of the main body 100 is ensured to be accurate; after the main body 100 is positioned, the positioning rack 31 of the accessory positioning mechanism 3 is driven to descend relative to the base 1, so that the positioning hole 3111 is aligned with the inner groove 101 of the main body 100, and the positioning card 3112 extends into the inner groove 101 for guiding the installation of the precision accessory 200. After the positioning frame 31 is lowered to the designated position, the precision part 200 is inserted through the positioning hole 3111 and placed in the inner groove 101 of the main body 100 along the two positioning tabs 3112, as shown in fig. 5, the positioning tabs 3112 of the positioning frame 31 are inserted into the inner groove 101, and the precision part 200 is placed in place. The locating rack 31 is used for locating the position of the precision part 200 in the groove 101 in the main body 100, and in the process of placing the precision part 200, the two locating clips 3112 can play a limiting role to prevent the precision part 200 from deviating. After the precision part 200 is mounted, the protection cylinder 41 of the protection mechanism 4 is driven to descend so that the protection cylinder 41 passes through the positioning hole 3111 and is pressed against the precision part 200, and as shown in fig. 6 and 7, the protection cylinder 41 descends to a position and is pressed against the precision part 200. Subsequently, the welding head of the welding machine is extended into the protective cylinder 41 to perform welding at the edge position of the fitting hole 201 until the welding is completed. The protective cylinder 41 can fix the position of the precision part 200, so that the precision part 200 is prevented from being shifted in position in the welding process; on the other hand, the protective cylinder 41 can prevent welding slag generated in the welding process from splashing to the adjacent part, so that the main body 100 is prevented from being burnt, and the product quality is ensured. In this embodiment, the main body 100 is positioned at the placing position on the base 1 by the main body positioning mechanism 2, and then the placing position of the precision part 200 on the main body 100 is positioned by the positioning frame 31 of the part positioning mechanism 3, so as to ensure the position accuracy of the precision part 200, improve the welding accuracy, and overcome the defects of deviation of the welding spot 300 and low accuracy of the welding position.

In addition, because the inner hole of the protection cylinder 41 is coaxially arranged with the accessory hole 201, and the inner hole of the protection cylinder 41 is larger than the accessory hole 201, when the protection cylinder 41 is pressed against the precision accessory 200, the inner cavity of the protection cylinder 41 can expose the edge position of the accessory hole 201, as shown in fig. 6, the edge position of the opening of the accessory hole 201 is not shielded, and a certain welding operation space is reserved.

Referring to fig. 3 and 4, the main body positioning mechanism 2 includes a first positioning block 21, a second positioning block 22, a first side pushing member 23, and a second side pushing member 24. The main body 100 is placed in the space surrounded by the four parts when being loaded, and the four parts cooperate to position the main body 100 in the direction X, Y.

In this embodiment, two first positioning blocks 21 are provided, the two first positioning blocks 21 are arranged at intervals along the X direction, two first side pushing pieces 23 are provided, the two first side pushing pieces 23 are arranged at intervals along the X direction, and the first side pushing pieces 23 and the first positioning blocks 21 are respectively arranged on the two sides of the base 1 along the Y direction on the base 1. The output end of the first side pushing member 23 extends along the Y direction to push the main body 100 until the main body 100 abuts against the two first positioning blocks 21, thereby completing the positioning of the main body 100 in the Y direction.

Similarly, two second positioning blocks 22 are provided, the two second positioning blocks 22 are arranged at intervals along the Y direction, two second side pushing pieces 24 are provided, the two second side pushing pieces 24 are arranged at intervals along the Y direction, and the second side pushing pieces 24 and the second positioning blocks 22 are respectively arranged on the base 1 at two sides of the base 1 along the X direction. The output end of the second side pushing element 24 extends along the X direction to push the main body 100 until the main body 100 abuts against the two second positioning blocks 22, thereby completing the positioning of the main body 100 in the X direction.

The first positioning block 21 and the first side pushing piece 23 are both provided with two, and the second positioning block 22 and the second side pushing piece 24 are both provided with two, so that the positioning accuracy can be ensured, excessive materials and driving parts are not used, and the cost is effectively controlled. Two locating pieces are all connected to the base 1 through locating pins and threaded fasteners. The first side pushing member 23 and the second side pushing member 24 are each preferably an air cylinder, and a mounting plate is provided at a rear end of a housing of the air cylinder, and the mounting plate is attached to a side surface of the base 1 by a threaded fastener, as shown in fig. 3 and 4.

Of course, in other embodiments, the number of the first positioning block 21, the second positioning block 22, the first side pushing element 23 and the second side pushing element 24 may be set according to the requirement, and the number of the four may be the same or different, and is not limited herein.

After the main body 100 is positioned in the direction X, Y, the position of the main body 100 needs to be further fixed, so that the main body 100 is prevented from moving in the welding process. As shown in fig. 4, in the present embodiment, a plurality of suction pads 11 for sucking the main body 100 are provided on the base 1. After the main body 100 comes into contact with the first positioning block 21 and the second positioning block 22, the main body 100 is fixed by suction by the plurality of suction pads 11, and the fixing process of the main body 100 is completed. The suction cup 11 is preferably a vacuum cup, which can be controlled automatically.

The front side and the rear side of the placed main body 100 are respectively abutted against the output end of the first side pushing piece 23 and the first positioning block 21, and the movement of the main body along the Y direction can be limited; the left side and the right side of the first positioning block are respectively abutted against the output end of the second side pushing piece 24 and the second positioning block 22, and the movement of the first positioning block along the X direction can be limited; the bottom surface of the base is fixed by suction by a plurality of suction cups 11, and the movement in the Z direction is restricted.

Four suckers 11 are arranged in the embodiment, and three suckers 11 are arranged around the position of the inner groove 101, namely around the welding position, so that the position of the to-be-welded point is firmly fixed. In other embodiments, the number and distribution of suction cups 11 may be set as desired.

Further, a plurality of support pads 12 for supporting the main body 100 are provided on the base 1. The supporting pad 12 contacts the bottom of the main body 100, so that the main body 100 can be prevented from being scratched.

The specific structure of the accessory positioning mechanism 3 is described below with reference to fig. 8 and 9.

As shown in fig. 8, the accessory positioning mechanism 3 further includes a first vertical plate 32, a first linear driving member 33, a connecting plate 34, a connecting rod 35, a first guide rail 36, and a first slider 37. Referring to fig. 4, the first vertical plate 32 is fixedly installed on the base 1, and is used for providing an installation base for the rest of components. First linear driving piece 33 is installed on first riser 32, and locating rack 31 is located one side of first riser 32 dorsad first linear driving piece 33, and first linear driving piece 33 and locating rack 31 divide the both sides of locating first riser 32 promptly, avoids arranging first linear driving piece 33 in the top of locating rack 31, saves this tool occupation space in vertical direction. Specifically, the output end of the first linear driving member 33 extends and retracts at the upper end of the housing of the first linear driving member 33, and the connecting plate 34 is connected to the output end of the first linear driving member 33 and extends and retracts synchronously therewith. The connecting plate 34 extends horizontally and crosses over the first vertical plate 32, and one end of the connecting plate 34 crossing over the first vertical plate 32 is connected with the connecting rod 35. The connecting rod 35 extends vertically, and one end of the connecting rod, which is far away from the connecting plate 34, is connected with the positioning frame 31. The output end of the first linear driving member 33, the connecting plate 34 and the connecting rod 35 form a door-shaped structure, and when the output end of the first linear driving member 33 moves telescopically, the connecting plate 34 and the connecting rod 35 drive the positioning frame 31 to ascend and descend.

The first guide rail 36 is arranged on one side of the first vertical plate 32, which is back to the first linear driving element 33, and extends vertically; the first slider 37 is connected to the positioning frame 31 and is vertically slidably engaged with the first guide rail 36. In the process of lifting the positioning frame 31, the first slider 37 moves vertically along the first guide rail 36 to provide guidance for lifting the positioning frame 31, so that the lifting precision is ensured.

As shown in fig. 9, the positioning frame 31 specifically includes a positioning portion 311, a first suspension arm 312, and a first mounting portion 313. The positioning hole 3111 and the positioning card 3112 are disposed on the positioning portion 311; the first cantilever 312 is connected to the positioning portion 311 and extends horizontally; the first mounting portion 313 is vertically connected to an end of the first suspension arm 312 away from the positioning portion 311, referring to fig. 8, an end of the connecting rod 35 away from the connecting plate 34 is provided with a first fixing frame 38, the first mounting portion 313 is embedded in the first fixing frame 38, and the first slider 37 is disposed on a side of the first fixing frame 38 facing the first vertical plate 32. The first fixing frame 38 can improve the installation stability of the mounting frame, and is convenient for installing the first sliding block 37. The first cantilever 312 is disposed to make the space above the positioning portion 311 free, so as to avoid the connecting rod 35 and the first fixing frame 38 disposed directly above the positioning portion 311 and prevent interference with the protective cylinder 41 in the lifting movement.

The specific structure of the guard mechanism 4 is explained below with reference to fig. 10, 11, and 12.

Referring to fig. 10, the guard mechanism 4 further includes a second upright plate 42, a second linear driving member 43, a second guide rail 44, and a second slider 45. The second vertical plate 42 is movably disposed on the base 1 along the horizontal direction, and specifically, can horizontally move along the Y direction. The second linear driving element 43 is disposed on the second vertical plate 42, and an output end of the second linear driving element 43 is connected to the protection cylinder 41 to drive the protection cylinder 41 to ascend and descend. By driving the second vertical plate 42 to move along the Y direction, the protection cylinder 41 can be driven to move horizontally to be close to or far away from the position of the precision fitting 200; the protective sleeve 41 can be driven down to press the precision fitting 200 by the second linear drive 43.

Continuing to refer to fig. 10, the second guide rail 44 is vertically disposed on the second vertical plate 42, and the second slider 45 is connected to the shielding cylinder 41 and is slidably engaged with the second guide rail 44 along the vertical direction. In the lifting process of the protective cylinder 41, the second slider 45 vertically moves along the second guide rail 44 to provide guidance for the lifting of the protective cylinder 41, so that the lifting precision of the protective cylinder 41 is ensured.

Referring to fig. 10 and 11, to realize the horizontal movement of the second vertical plate 42 along the Y direction, the protection mechanism 4 further includes a third linear driving element 46, a third guide rail 47 and a third sliding block 48. The housing of the third linear driving element 46 is fixedly disposed on the base 1, and the output end of the third linear driving element 46 moves in a telescopic manner along the Y direction and is connected to the second vertical plate 42 to drive the second vertical plate 42 to move along the Y direction. Third guide rail 47 sets up on base 1 along Y direction level, and third slider 48 sets up in the bottom of second riser 42 to but with third guide rail 47 along Y direction sliding fit. During the movement of the second vertical plate 42, the third sliding block 48 slides along the third guiding rail 47 to provide a guide for the horizontal movement of the second vertical plate 42, so as to prevent the second vertical plate 42 from moving and deviating, thereby ensuring that the protection cylinder 41 can move horizontally to the position right above the precision fitting 200. Preferably, the third guide rails 47 are arranged in parallel and at intervals of two.

Further, referring to fig. 11, a mounting plate 49 is disposed at a bottom end of the second vertical plate 42, the third slider 48 is disposed on the mounting plate 49, two triangular plates 410 are disposed between a side of the second vertical plate 42 facing away from the second linear driving member 43 and the mounting plate 49, and the two triangular plates 410 are disposed in parallel and spaced apart from each other to improve the connection strength between the second vertical plate 42 and the mounting plate 49.

Referring to fig. 12, the shield cylinder 41 includes a cylinder 411, a second cantilever 412, and a second mounting portion 413. The cylinder 411 can penetrate through the positioning hole 3111 and tightly press the precision part 200, the cylinder 411 and the part hole 201 are coaxial, and the inner diameter of the cylinder is larger than the inner diameter of the part hole 201. The second suspension 412 is connected to the cylinder 411, the extending direction of the second suspension is substantially horizontal, the second mounting part 413 is connected to one end of the second suspension 412 away from the cylinder 411, referring to fig. 10, the output end of the second linear driving element 43 is connected to the second fixing frame 420, the second mounting part 413 is embedded in the second fixing frame 420, and the second slider 45 is disposed on the second fixing frame 420. The second fixing frame 420 can ensure the installation strength of the protective cylinder 41 and facilitate installation of the second slider 45. The second suspension arm 412 is disposed to make the space above the cylinder 411 empty, so as to prevent the second linear driving element 43 and the second fixing frame 420 from being located right above the cylinder 411 and prevent the welding head of the interference welding machine from entering the cylinder 411. The empty space above the cylinder 411 is an operation space of the welding machine, and the structural design is reasonable.

Alternatively, the first linear drive element 33, the second linear drive element 43 and the third linear drive element 46 are each a pneumatic cylinder, but of course they could also be hydraulic or electric cylinders.

The welding jig provided in this embodiment generally comprises the following steps when welding the precision part 200 and the main body 100:

firstly, the main body 100 is placed in an area enclosed by the first positioning block 21, the second positioning block 22, the first side pushing piece 23 and the second side pushing piece 24 are driven to push the main body 100 until the main body 100 is abutted against the first positioning block 21 and the second positioning block 22, and the positioning of the main body 100 on the base 1 is completed; subsequently, the suction cup 11 is controlled to suck the main body 100, and the fixing of the main body 100 in the Z direction is completed. After the main body 100 is fixed, the first linear driving member 33 drives the positioning rack 31 to descend until the positioning block 3112 extends into the inner groove 101 on the main body 100, and after the positioning rack 31 descends to the designated position, the precision part 200 is inserted through the positioning hole 3111 and placed into the inner groove 101 on the main body 100 along the two positioning blocks 3112, thereby completing the positioning of the precision part 200 (as shown in fig. 5); after the precision part 200 is installed, the third linear driving element 46 drives the second vertical plate 42 to move forward until the protection cylinder 41 reaches the position right above the precision part 200, and then the second linear driving element 43 drives the protection cylinder 41 to move downward, so that the cylinder 411 of the protection cylinder 41 passes through the positioning hole 3111 and is pressed on the precision part 200, thereby completing the fixing of the precision part 200 (as shown in fig. 6 and 7). To this end, the main body 100 and the precision fitting 200 are positioned and fixed. Then, the welding head of the welding machine is extended into the protective cylinder 41 to weld at the edge position of the fitting hole 201 until the welding is completed.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. Welding jig, the work piece of waiting to weld includes main part (100) and precision parts (200), be provided with inside groove (101) on main part (100), precision parts (200) place in the diapire of inside groove (101), just be provided with accessory hole (201) on precision parts (200), the border of accessory hole (201) is welding position, its characterized in that, welding jig includes:

a base (1);

a main body positioning mechanism (2) for positioning a placement position of the main body (100) on the base (1);

the accessory positioning mechanism (3) comprises a positioning frame (31) capable of being lifted relative to the base (1), a positioning hole (3111) is formed in the positioning frame (31), two side walls opposite to the positioning hole (3111) extend downwards to form a positioning clamp (3112), the positioning clamp (3112) can extend into the inner groove (101), and the precision accessory (200) penetrates through the positioning hole (3111) and is placed into the inner groove (101) along the two positioning clamps (3112);

protection machanism (4), including relatively protection section of thick bamboo (41) of base (1) liftable, protection section of thick bamboo (41) can pass locating hole (3111) and compress tightly in precision part (200), the hole of protection section of thick bamboo (41) with accessory hole (201) coaxial setting, just the hole aperture of protection section of thick bamboo (41) is greater than the aperture of accessory hole (201).

2. The welding jig according to claim 1, characterized in that the main body positioning mechanism (2) comprises:

the positioning device comprises at least two first positioning blocks (21), wherein the at least two first positioning blocks (21) are arranged at intervals along the X direction;

the number of the second positioning blocks (22) is at least two, and the at least two second positioning blocks (22) are arranged at intervals along the Y direction.

3. The welding jig according to claim 2, characterized in that the main body positioning mechanism (2) further comprises:

the number of the first side pushing pieces (23) is at least two, the at least two first side pushing pieces (23) are arranged at intervals along the X direction, and the main body (100) is positioned between the first positioning block (21) and the output end of the first side pushing piece (23);

the number of the second side pushing pieces (24) is at least two, the at least two second side pushing pieces (24) are arranged at intervals along the Y direction, and the main body (100) is located between the second positioning block (22) and the output end of the second side pushing piece (24).

4. The welding jig of claim 1, wherein the accessory positioning mechanism (3) further comprises:

the first vertical plate (32) is fixedly arranged on the base (1);

the first linear driving part (33) is arranged on the first vertical plate (32), and the positioning frame (31) is positioned on one side, back to the first linear driving part (33), of the first vertical plate (32);

the connecting plate (34) is arranged at the output end of the first linear driving piece (33);

the connecting rod (35) extends vertically, the connecting plate (34) crosses over the first vertical plate (32) and is connected with the connecting rod (35), and the positioning frame (31) is connected to one end, far away from the connecting plate (34), of the connecting rod (35);

the first guide rail (36) is arranged on one side, back to the first linear driving part (33), of the first vertical plate (32) and extends vertically;

and the first sliding block (37) is connected with the positioning frame (31) and is in slidable fit with the first guide rail (36) along the vertical direction.

5. Welding jig according to claim 4, characterized in that the locating rack (31) comprises:

a positioning portion (311), the positioning hole (3111) being provided to the positioning portion (311);

a first cantilever (312) connected to the positioning part (311) and extending horizontally;

the first installation part (313) is vertically connected to one end, away from the positioning part (311), of the first cantilever (312), one end, away from the connecting plate (34), of the connecting rod (35) is provided with a first fixing frame (38), the first installation part (313) is embedded in the first fixing frame (38), and the first sliding block (37) is arranged on one side, facing the first vertical plate (32), of the first fixing frame (38).

6. The welding jig according to claim 5, characterized in that the protection mechanism (4) further comprises:

the second vertical plate (42) is movably arranged on the base (1) along the horizontal direction;

the second linear driving piece (43) is arranged on the second vertical plate (42), and the output end of the second linear driving piece (43) is connected with the protective cylinder (41);

a second guide rail (44) vertically arranged on the second vertical plate (42),

and the second sliding block (45) is connected with the protective barrel (41) and is in slidable fit with the second guide rail (44) along the vertical direction.

7. The welding jig of claim 6, wherein the protection mechanism (4) further comprises:

the third linear driving part (46) is fixedly arranged on the base (1), and the output end of the third linear driving part (46) is connected with the second vertical plate (42);

a third guide rail (47) horizontally arranged on the base (1);

and the third sliding block (48) is arranged at the bottom end of the second vertical plate (42) and is in sliding fit with the third guide rail (47) along the horizontal direction.

8. Welding jig according to claim 6, characterized in that the protective cylinder (41) comprises:

the cylinder (411) can be arranged in the positioning hole (3111) in a penetrating mode and is pressed on the precision part (200) in a pressing mode;

a second cantilever (412) connected to the cylinder (411);

second installation department (413), connect in second cantilever (412) are kept away from the one end of barrel (411), the output of second linear driving piece (43) is connected with second mount (420), second installation department (413) inlay and adorn in second mount (420), second slider (45) set up in on second mount (420).

9. Welding jig according to any one of claims 1-8, characterized in that base (1) is provided with a plurality of suction cups (11) for attracting the body (100).

10. Welding jig according to any one of claims 1-8, characterized in that a plurality of support pads (12) for supporting the main body (100) are provided on the base (1).

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