CN110026727A - White vehicle body welding fixture three-dimensional localization Precision trimming mechanism - Google Patents

Abstract

The precision fine-tuning mechanism for three-dimensional positioning of body-in-white welding tooling belongs to the field of automobile body-in-white welding tooling. The problem of large and repetitive design and manufacture. The three-dimensional positioning precision fine-tuning mechanism of the body-in-white welding tool of the present invention comprises: a base part; a horizontal X-direction moving part installed in the base part; a vertical Y-direction moving part installed on the horizontal X-direction moving part; The longitudinal Z-direction moving part on the moving part; the positioning pin installed on the longitudinal Z-direction moving part. The invention has the advantages of convenient operation, high adjustment precision and flexibility, compact and reasonable structure, and flexible adjustment.

Description

Three-dimensional positioning precision fine-tuning mechanism of body-in-white welding tooling

technical field

The invention belongs to the technical field of automobile body-in-white welding tooling, and in particular relates to a three-dimensional positioning precision fine-tuning mechanism for a body-in-white welding tooling.

Background technique

Automotive welding tooling is a process equipment that positions and tightens modular body stamping parts or welded joints, and assists welding torches to weld the body to improve the accuracy and quality of body assembly. It is usually composed of substrates, supports, vertical plates, It is composed of pressing arm, cylinder, positioning clamping block, limit block and positioning pin. Among them, the positioning pin plays a positioning role in the welding process, and has an important impact on the assembly and welding accuracy of the body.

At present, in the field of automobile welding tooling, the method of inserting precision gaskets between connecting blocks is widely used for three-dimensional positioning adjustment. This adjustment method has a large number of repeated designs, and the design cycle is long, the actual assembly and adjustment flexibility is poor, and the flexibility It is not high, the fixture structure is redundant, and it takes up a lot of space. It is no longer suitable for the development trend of modern automobile manufacturing.

SUMMARY OF THE INVENTION

In order to solve the problems of poor mechanism positioning accuracy, complex assembly and adjustment, poor flexibility, redundant structure, large space occupation and repeated design and manufacture when welding different body-in-white stamping parts in welding fixture application, the present invention provides a convenient operation, adjustment accuracy and High flexibility, compact and reasonable structure, and flexible adjustment of the three-dimensional positioning and fine-tuning mechanism of the body-in-white welding tooling.

The technical scheme adopted by the present invention for solving the technical problem is as follows:

The three-dimensional positioning precision fine-tuning mechanism of the body-in-white welding tooling of the present invention includes:

base part;

A horizontal X-direction moving part installed in the base part;

The vertical Y-direction moving part installed on the horizontal X-direction moving part;

Longitudinal Z-direction moving parts installed on vertical Y-direction moving parts;

Dowels mounted on longitudinal Z moving parts.

Further, the base part includes:

The base connected with the automobile welding fixture;

At least one leak-proof oil sealing cover installed on the side wall of the base;

Two dustproof plates installed on the upper end of the base;

Multiple springs installed in the dust plate;

The first sealing cover fixed on the base.

Further, the horizontal X-direction moving parts include:

The handle screw installed in the through hole of the base;

Two horizontal rails fixed on the base;

Vertical rails mounted on two horizontal rails;

Two sliders installed on the vertical guide rails, and the two sliders are respectively installed on the two horizontal guide rails in one-to-one correspondence;

Ball groove set on the slider;

Multiple balls, half of the balls are placed in the ball groove, and the other half of the balls are embedded in the horizontal guide rail;

ball cover fixed on the slider;

Handle screw installed in the through hole of the vertical rail;

A first rolling bearing, a first bearing end cover, a lead screw nut, another first rolling bearing, another lead screw nut, and another first bearing end cover, which are sequentially sleeved on the handle screw; two lead screw nuts The outer ring is fixed with the inner wall of the through hole of the vertical guide rail.

Further, the handle screw is composed of two threads, the lead is 2mm, and the rotation direction is right-handed.

Further, the vertical Y-direction moving component includes:

a first rack slider fixed on the vertical guide rail, the lower end of the first rack slider is provided with a rack;

a second sealing cover fixed on the upper end of the first rack slider;

the first handle;

The second bearing end cover and the second rolling bearing sleeved on the first handle in sequence;

The transmission shaft fixed on the first handle;

A third rolling bearing, a first spur gear, and another third rolling bearing are sequentially sleeved on the transmission shaft, and the first spur gear meshes with the gear rack at the lower end of the first rack slider.

Further, the longitudinal Z-direction moving component includes:

Two fourth rolling bearings whose outer ring is fixed on the first rack slider;

The longitudinal guide rail and the second rack slider are both installed in the first rack slider, the longitudinal guide rail is fixed on the inner wall of the first rack slider, and the second rack slider is installed on the longitudinal guide rail, The second rack slider and the longitudinal guide rail are locked by locking screws, and a rack is provided on the side surface of the second rack slider;

second handle;

A third bearing end cover, a fourth rolling bearing, a second spur gear, another fourth rolling bearing, and another third bearing end cover sleeved on the second handle in sequence, the second spur gear and the second rack The racks on the sides of the slide engage.

Further, the positioning pins are circular pins and diamond pins.

Further, the adjustment ranges of the horizontal X-direction moving parts, the vertical Y-direction moving parts, and the vertical Z-direction moving parts in the three directions of X, Y, and Z are all -4 to 4 mm, and the adjustment accuracy is all 0.1 mm.

The beneficial effects of the present invention are: the present invention is installed on the vertical plate or the connecting block of the automobile welding tooling fixture, and the three-dimensional positioning precision fine-tuning mechanism of the white body welding tooling of the present invention mainly includes: a base part, a horizontal X direction moving part, a vertical Y direction Moving parts, longitudinal Z moving parts and positioning pins. The invention has the functions of fine-tuning in three directions of X, Y and Z, and has the characteristics of parameterization, serialization and standardization. Strong, convenient for welding and operation, shortens the design and manufacturing cycle of automobile welding fixtures, and can adapt to welding requirements of different workpieces and working conditions, greatly improving production efficiency.

The invention has flexibility and integration in the adjustment performance, can eliminate or reduce the cumulative error from the base plate to the pin seat from the design, production to the assembly process, and avoid the upper and lower processes or different batches of vehicle parts. To a certain extent, it is beneficial to improve the efficiency and quality of the welding assembly of the whole automobile.

Description of drawings

FIG. 1 is a general assembly diagram of the three-dimensional positioning precision fine-tuning mechanism of the body-in-white welding tool of the present invention.

Figure 2 is an assembly view of the base part.

Figure 3 is an exploded view of the base part.

Figure 4 is an assembly view of the horizontal X-direction moving parts.

Figure 5 is an exploded view of the horizontal X-direction moving parts.

Figure 6 is an assembly diagram of vertical Y-direction moving parts.

Figure 7 is an exploded view of vertical Y-direction moving parts.

Figure 8 is an assembly view of the longitudinal Z-direction moving parts.

Figure 9 is an exploded view of the longitudinal Z-direction moving parts.

In the figure: a-base part, b-horizontal X-direction moving part, c-vertical Y-direction moving part, d-longitudinal Z-direction moving part, e-positioning pin, 1-base, 2-oil leak-proof sealing cover, 3-spring, 4-dust plate, 5-first sealing cover, 6-handle screw, 7-first rolling bearing, 8-lead screw nut, 9-first bearing end cover, 10-horizontal guide rail, 11- Slide block, 12-ball, 13-ball cover, 14-vertical guide rail, 15-first handle, 16-second bearing end cover, 17-first rolling bearing, 18-transmission shaft, 19-first spur gear, 20 -3rd rolling bearing, 21-1st rack slider, 22-2nd sealing cover, 23-2nd handle, 24-2nd spur gear, 25-3rd bearing end cover, 26-4th rolling bearing, 27- Longitudinal rail, 28-lock screw, 29-second rack slider.

Detailed ways

Corresponding to the accompanying drawings, a more detailed description is given by describing each component, so as to help the relevant technical personnel to have a more complete, accurate and in-depth understanding of the ideas and technical solutions of the present invention.

As shown in FIG. 1 , the three-dimensional positioning precision fine-tuning mechanism of the body-in-white welding tool of the present invention mainly includes: a base part a, a horizontal X-direction moving part b, a vertical Y-direction moving part c, a longitudinal Z-direction moving part d and a positioning pin e . The horizontal X-direction moving part b is installed in the base part a, the vertical Y-direction moving part c is installed on the horizontal X-direction moving part b, the vertical Z-direction moving part d is installed on the vertical Y-direction moving part c, and the positioning pin e is installed On the moving part d in the longitudinal Z direction.

Move the horizontal X-direction moving part b to drive the vertical Y-direction moving part c and the vertical Z-direction moving part d to move in the X direction, and at the same time drive the positioning pin e to move in the X direction to realize the movement adjustment of the positioning pin e in the X direction; move the vertical Y direction The moving part c drives the longitudinal Z-direction moving part d to move in the Y direction, and at the same time drives the positioning pin e to move in the Y direction to realize the movement adjustment of the positioning pin e in the Y direction; moving the longitudinal Z-direction moving part d to move in the Z direction, while Drive the positioning pin e to move in the Z direction to realize the movement adjustment of the positioning pin e in the Z direction.

As shown in FIG. 2 and FIG. 3 , the base part a mainly includes: a base 1 , four oil-leakage-proof sealing covers 2 , a plurality of springs 3 , two dust-proof plates 4 , and a first sealing cover 5 . The base part a is used to support, fix and encapsulate the horizontal X-direction moving part b. The lower end of the base 1 has two pin holes and two through holes, which are used for screwing and fixing with the vertical plate or connecting block of the automobile welding fixture. The lower end of the base 1 is fixed on the vertical plate or the connecting block of the automobile welding fixture. to stabilize the entire organization. The upper end of the base 1 is of a hollow structure, and four mounting holes are opened on the side walls for installing the leak-proof oil sealing cover 2 . The side wall of the base 1 is also provided with a through hole for installing the horizontal X-direction moving part b. A groove is provided on the upper end surface of the base 1 for installing the dustproof plate 4 .

The leak-proof oil sealing cover 2 is installed in the installation hole of the side wall of the base 1 . In order to make the moving part b in the horizontal X direction move better, it is necessary to inject lubricating oil into the mechanism, and use the oil-leakage sealing cover 2 to prevent oil leakage.

The dustproof plate 4 is installed in the groove of the base 1 . A plurality of springs 3 are mounted in the dust plate 4 . When the horizontal X-direction moving part b moves, there will be a gap with the base. Under the action of the spring 3, the dust-proof plate 4 is pressed against the outer wall of the slider 11 in the horizontal X-direction moving part b, so as to prevent dust from passing through The clearance enters the inside of the mechanism to avoid affecting the positioning accuracy of the positioning pin e.

The first sealing cover 5 is fixed on the base 1 to seal the interior of the base 1 .

As shown in Figures 4 and 5, the horizontal X-direction moving part b mainly includes: handle screw 6, two first rolling bearings 7, two screw nuts 8, two first bearing end caps 9, and two horizontal guide rails 10. Two sliders 11 , multiple balls 12 , two ball covers 13 , and vertical guide rails 14 .

One of the first rolling bearings 7, a first bearing end cover 9, and a lead screw nut 8 are mounted on one end of the handle screw 6, which is mounted in the through hole of the vertical guide rail 14, and the other first rolling bearing 7, the other One lead screw nut 8 and the other first bearing end cap 9 are mounted on the other end of the handle lead screw 6 , and at the same time, the outer rings of the two lead screw nuts 8 are fixed to the inner wall of the through hole of the vertical guide rail 14 . At the same time, the handle screw 6 protrudes out of the through hole on the base 1 .

The two horizontal guide rails 10 are both fixed on the inner wall of the upper end of the base 1 and are connected by screws. The side walls of the two sliders 11 are mounted on the vertical guide rails 14 . Vertical rails 14 are mounted on the two horizontal rails 10 . The two sliding blocks 11 are respectively installed on the two horizontal guide rails 10 in a one-to-one correspondence. A ball groove is machined on the slider 11, half of the ball 12 is placed in the ball groove, and the other half of the ball 12 is embedded in the horizontal guide rail 10, and then the ball cover 13 is fixed on the slider 11. A ball rolling pair is formed inside the horizontal guide rail 10 .

Rotating the handle screw 6, under the action of the screw nut 8, drives the vertical guide rail 14 to move on the horizontal guide rail 10. In order to better move the vertical guide rail 14 on the horizontal guide rail 10 and reduce the friction between the two, adding sliding Block 11, ball 12 and ball cover 13, a ball groove is machined on the slider 11, half of the ball 12 is placed in the ball groove, and the other half is embedded in the horizontal guide rail 10. When the vertical guide rail 14 moves, it will drive the ball 12 on the horizontal guide rail. 10, so that the vertical guide 14 can move better.

The handle screw 6 of the horizontal X-direction moving part b is composed of two threads, the lead is 2mm, and the rotation direction is right-handed.

As shown in Figures 6 and 7, the vertical Y-direction moving part c mainly includes: a first handle 15, a second bearing end cover 16, a second rolling bearing 17, a transmission shaft 18, a first spur gear 19, and two third rolling bearings 20. The first rack slider 21 and the second sealing cover 22.

The vertical Y-direction moving part c is integrally fixed on the vertical guide rail 14 . The second sealing cover 22 is fixed on the upper end of the first rack slider 21 . The lower end of the first rack slider 21 is fixed on the vertical guide rail 14 . The second bearing end cover 16 and the second rolling bearing 17 are sequentially sleeved on the first handle 15 . The transmission shaft 18 is fixed on the first handle 15 . A third rolling bearing 20 , the first spur gear 19 and the other third rolling bearing 20 are sequentially sleeved on the transmission shaft 18 . The lower end of the first rack slider 21 is provided with a rack, the first spur gear 19 meshes with the rack at the lower end of the first rack slider 21 , and the first spur gear 19 and the rack on the first rack slider 21 are formed. gear pair.

When the vertical guide rail 14 moves, the vertical Y-direction moving part c will move in the X direction, and then the first handle 15 is rotated to drive the spur gear to rotate 19 through the transmission shaft 18, and the first spur gear 19 and the first rack slider 21. Meshing to realize the movement of the first rack slider 21 in the Y direction.

As shown in Figures 8 and 9, the longitudinal Z-direction moving part d mainly includes: a second handle 23, a second spur gear 24, two third bearing end caps 25, two fourth rolling bearings 26, a longitudinal guide rail 27, a lock Tighten the screw 28 and the second rack slider 29.

A third bearing end cover 25 , a fourth rolling bearing 26 , a second spur gear 24 , another fourth rolling bearing 26 , and another third bearing end cover 25 are sequentially sleeved on the second handle 23 . The second handle 23 is assembled on the first rack slider 21 under the support of the fourth rolling bearing 26 , that is, the outer ring of the fourth rolling bearing 26 is fixed on the first rack slider 21 . Both the longitudinal rail 27 and the second rack slider 29 are mounted in the first rack slider 21 . The longitudinal guide rail 27 is fixed on the inner wall of the first rack slider 21 , the second rack slider 29 is installed on the longitudinal guide rail 27 , and the second rack slider 29 and the longitudinal guide rail 27 are locked by locking screws 28 . A rack that meshes with the second spur gear 24 is provided on the side of the second rack slider 29 , and the second spur gear 24 and the rack on the second rack slider 29 form a gear pair. The upper end of the second rack slider 29 is also provided with a pin hole for installing the positioning pin e.

Rotating the second handle 23 drives the second spur gear 24 to rotate, and the second spur gear 24 and the second rack slider 29 are engaged by a rack and pinion, thereby causing the second rack slider 29 to move up and down on the longitudinal guide rail 27, After moving to the designated position, use the locking screw 28 for locking. The locking screw 28 can be locked so that it is not affected by factors such as its own gravity, external force, and mechanical vibration.

As shown in FIG. 1 , the positioning pins e are generally round pins and diamond pins. The positioning pin e is installed in the pin hole on the upper end of the second rack slider 29 . The adjustment of the positioning pin e in the three directions of X, Y, and Z is realized by the three-dimensional positioning and fine-tuning mechanism of the body-in-white welding tool of the present invention.

The adjustment range of the three-dimensional positioning precision fine-tuning mechanism of the body-in-white welding tool of the present invention in the three directions of X, Y and Z is -4 to 4 mm, and the adjustment precision can reach the level of 0.1 mm.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (8)

1. The three-dimensional positioning precision fine-tuning mechanism of the body-in-white welding tooling is characterized in that, comprising: base part (a); A horizontal X-direction moving part (b) installed in the base part (a); The vertical Y-direction moving part (c) installed on the horizontal X-direction moving part (b); The longitudinal Z-direction moving part (d) mounted on the vertical Y-direction moving part (c); Locating pin (e) mounted on longitudinal Z moving part (d). 2. The three-dimensional positioning precision fine-tuning mechanism for body-in-white welding tooling according to claim 1, wherein the base part (a) comprises: A base (1) connected to an automobile welding fixture; at least one leak-proof oil sealing cover (2) mounted on the side wall of the base (1); Two dustproof plates (4) installed on the upper end of the base (1); a plurality of springs (3) installed in the dust plate (4); The first sealing cover (5) fixed on the base (1). 3. The three-dimensional positioning precision fine-tuning mechanism for body-in-white welding tooling according to claim 2, wherein the horizontal X-direction moving part (b) comprises: The handle screw (6) installed in the through hole of the base (1); Two horizontal rails (10) fixed on the base (1); vertical rails (14) mounted on two horizontal rails (10); two sliding blocks (11) installed on the vertical guide rails (14), and the two sliding blocks (11) are respectively installed on the two horizontal guide rails (10) in one-to-one correspondence; ball grooves arranged on the slider (11); a plurality of balls (12), half of the balls (12) are placed in the ball groove, and the other half of the balls (12) are embedded in the horizontal guide rail (10); The ball cover (13) fixed on the slider (11); the handle screw (6) installed in the through hole of the vertical rail (14); A first rolling bearing (7), a first bearing end cover (9), a lead screw nut (8), another first rolling bearing (7), and another lead screw that are sequentially sleeved on the handle screw (6) A nut (8), another first bearing end cover (9); the outer rings of the two lead screw nuts (8) are fixed to the inner wall of the through hole of the vertical guide rail (14). 4. The three-dimensional positioning precision fine-tuning mechanism for body-in-white welding tooling according to claim 3, wherein the handle screw (6) is composed of two threads, the lead is 2mm, and the rotation direction is right-handed. 5. The three-dimensional positioning precision fine-tuning mechanism for body-in-white welding tooling according to claim 3, wherein the vertical Y-direction moving part (c) comprises: a first rack slider (21) fixed on the vertical guide rail (14), the lower end of the first rack slider (21) is provided with a rack; a second sealing cover (22) fixed on the upper end of the first rack slider (21); a first handle (15); a second bearing end cover (16) and a second rolling bearing (17) sleeved on the first handle (15) in sequence; a transmission shaft (18) fixed on the first handle (15); A third rolling bearing (20), a first spur gear (19), and another third rolling bearing (20) sleeved on the transmission shaft (18) in sequence, the first spur gear (19) slides with the first rack. The gear rack at the lower end of the block (21) is engaged. 6. The three-dimensional positioning and fine-tuning mechanism for body-in-white welding tooling according to claim 5, wherein the longitudinal Z-direction moving part (d) comprises: two fourth rolling bearings (26) whose outer ring is fixed on the first rack slider (21); A longitudinal guide rail (27) and a second rack slider (29) both installed in the first rack slider (21), the longitudinal guide rail (27) being fixed on the inner wall of the first rack slider (21) , the second rack slider (29) is installed on the longitudinal guide rail (27), the second rack slider (29) and the longitudinal guide rail (27) are locked by locking screws (28), the A rack is provided on the side of the second rack slider (29); the second handle (23); A third bearing end cover (25), a fourth rolling bearing (26), a second spur gear (24), another fourth rolling bearing (26), another third The bearing end cover (25), the second spur gear (24) meshes with the rack on the side surface of the second rack slider (29). 7 . The three-dimensional positioning and fine-tuning mechanism for body-in-white welding tooling according to claim 1 , wherein the positioning pins (e) are circular pins and diamond pins. 8 . 8. The three-dimensional positioning precision fine-tuning mechanism of body-in-white welding tooling according to claim 1, wherein the horizontal X-direction moving part (b), the vertical Y-direction moving part (c), the longitudinal Z-direction moving part (d) ) in the three directions of X, Y, Z, the adjustment range is -4 ~ 4mm, and the adjustment accuracy is 0.1mm.