CN106239007B - A kind of body side wall pre-installs alignment system - Google Patents

Abstract

The invention discloses a side wall pre-installation positioning system of a car body. A number of positioning mechanisms are respectively designed at relevant stations, and the X direction of the side wall can be accurately positioned to ±0.5mm step by step, and the Z direction of the side wall can be floated up and down in the theoretical position, and accurately After positioning, the positioning pin of the side wall fixture can be smoothly inserted into the side wall positioning hole without causing deformation of the side wall positioning hole, thereby solving the problem of part deformation. The design of the invention has simple structure, convenient implementation, high positioning accuracy and stable quality.

Description

A pre-installed positioning system for the side wall of a vehicle body

technical field

The patent of the invention belongs to the technical field of vehicle body manufacturing, and relates to a vehicle body welding and positioning assistance, in particular to a vehicle body side circumference pre-installation positioning system.

Background technique

In the design of body welding and forming process, in order to improve the tempo and automation rate, the side wall pre-assembly and forming welding are usually divided into two stations. (lower the height to facilitate the operation), then, the left and right side panels are moved closer to the floor and lowered to the predetermined position (about ±3mm), and then the side panel buckles are pre-installed on the floor (about ±3mm relative movement), pre-installed The finished car body is lifted up with the lifting mechanism and transported to the side wall assembly station. The car body is dropped to the floor positioning fixture with the lifting mechanism, and the left and right side wall positioning fixtures move closer to the body to precisely position the side wall.

In the above process, if the side wall is pre-installed, if there is a large difference between the front and rear positions of the floor, after the pre-buckle is locked, when the positioning pin of the fixture from the body to the assembling station penetrates into the positioning hole of the side wall, the parts are easily deformed; another On the one hand, as mentioned above, after the side wall and the floor are pre-installed, small relative movements can occur. Under the action of the side wall’s own weight, the side wall sinks relative to the floor to a certain extent. When the positioning pin penetrates, there is also the problem of part deformation.

In order to solve the above problems, there are usually two solutions: 1. Slow down the pre-installation speed to improve the pre-installation accuracy, and at the same time reduce the pin-threading speed of the side wall fixture to reduce the impact on the parts, but this solution affects the parts to a certain extent. Production cycle; 2. Design positioning holes with flanging on the side wall parts to strengthen the rigidity around the holes, but this increases the stamping process and cost, and the hole diameter accuracy is low.

Contents of the invention

In view of the problems existing in the background technology, the object of the present invention is to provide a vehicle body side wall pre-assembly positioning system that solves the problem of deformation of parts.

In order to achieve the above purpose, the vehicle body side circumference pre-assembly positioning system designed by the present invention includes a pre-assembly station and an assembly station, and is characterized in that: the pre-assembly station is provided with a rough positioning mechanism, and the assembly station is provided with There is a fine positioning mechanism; the rough positioning mechanism includes first fixed seats symmetrically arranged on both sides of the side wall, and the top of the first fixed seat is provided with a group of X-direction coarse guide blocks oppositely arranged, and a group of Z-direction coarse guide blocks oppositely arranged. To the supporting block and the vertically arranged X-direction coarse guide pin; the height of the X-direction coarse guide block>the height of the X-direction coarse guide pin>the height of the Z-direction support block; the X-direction coarse guide block will surround X The X-direction position is guided to ±2.5mm of the theoretical position, and the X-direction coarse guide pin guides the X-direction position of the side wall to ±0.5mm of the theoretical position; the Z-direction support block supports the side wall; the fine positioning The mechanism includes a second fixed seat symmetrically arranged on both sides of the side wall, and the top of the second fixed seat is provided with an X-direction fine guide pin and a Z-direction floating support mechanism, and the height of the X-direction fine guide pin is greater than the Z-direction floating support The height of the block; the X-direction fine guide pin guides the X-direction position of the side wall to ±0.25mm of the theoretical position; the Z-direction floating support mechanism carries the side wall; the X-direction coarse guide pin and the X-direction fine guide The pins are all located directly below the side wall pre-positioning holes.

Preferably, the X-direction thick guide block includes a vertical portion and an inclined portion; the distance between the connection between the inclined portion and the vertical portion on the same side is greater than the distance between the tops of the inclined portion on the same side.

Preferably, the Z-direction support blocks are located between the X-direction coarse guide blocks, and the X-direction coarse guide pins are located between the Z-direction support blocks.

Preferably, the diameter of the X-direction coarse guide pin is smaller than the diameter of the X-direction fine guide pin.

Further preferably, both the X-direction coarse guide pin and the X-direction fine guide pin are diamond-shaped pins.

Preferably, the X-direction fine guide pin is located between the Z-direction floating support mechanisms.

Preferably, the Z-direction floating support mechanism includes a base connected to the top of the second fixed seat and a floating block, one end of the floating block is rotatably connected to one end of the base through a rotating shaft; the bottom of the floating block and the top of the base With support spring.

Further preferably, a limit pin is provided between the base and the floating block; the end of the limit pin passes through the side wall of the floating block, and extends into a waist-shaped hole provided on the base. In this way, the waist-shaped hole cooperates with the limit pin to limit the movable stroke of the floating block.

Still further preferably, the base is provided with a groove for accommodating the floating block.

Preferably, by adjusting the position of the X-direction coarse guide block 5mm from the bottom edge of the side wall, the X-direction coarse guide block guides the X-direction position of the side wall to ±2.5mm of the theoretical position; by setting the diameter of the coarse guide pin to be smaller than the side wall Pre-positioning hole 1mm realizes that the X-direction coarse guide pin guides the X-direction position of the side wall to ±0.5mm of the theoretical position; by setting the diameter of the fine guide pin less than 0.5mm in the pre-positioning hole, the X-direction fine guide pin guides the side wall The X-direction position is guided to ±0.25mm of the theoretical position.

The beneficial effect of the present invention is that several positioning mechanisms are respectively designed at the relevant stations, and the X direction of the side wall is accurately positioned to ±0.5mm step by step, and the Z direction of the side wall is realized to float up and down in the theoretical position, and the side wall fixture is positioned after precise positioning. The pin can be smoothly inserted into the positioning hole of the side wall without causing deformation of the positioning hole of the side wall, thereby solving the deformation problem of the above-mentioned parts. The design of the invention has simple structure, convenient implementation, high positioning accuracy and stable quality.

Description of drawings

Fig. 1 is the structural diagram of pre-installation station of the present invention

Figure 2 is a top view of Figure 1

Fig. 3 is the structural diagram of the combination station of the present invention

Figure 4 is a top view of Figure 3

Fig. 5 is an equipment diagram of the pre-assembly station of Embodiment 1

Fig. 6 is a schematic perspective view of the three-dimensional structure of the coarse positioning mechanism in Embodiment 1, only one side is shown in the figure, and the other side is symmetrical to it

Fig. 7 is an equipment diagram of the combining station of Embodiment 1

Fig. 8 is a three-dimensional schematic diagram of the fine positioning mechanism in Embodiment 1, only one side is shown in the figure, and the other side is symmetrical to it

Fig. 9 is an enlarged schematic diagram of place A in Fig. 8

Figure 10 is a view from Figure 9

Figure 11 is an exploded schematic view of the Z-direction floating mechanism in Embodiment 1

In the figure: rough positioning mechanism 1, fine positioning mechanism 2, first fixed seat 3, X-direction coarse guide block 4 (vertical part 4.1, inclined part 4.2), Z-direction support block 5, X-direction coarse guide pin 6, the first Two fixed seat 7, fine guide pin 8 in X direction, floating support mechanism 9 in Z direction (base 9.1, floating block 9.2, rotating shaft 9.3, support spring 9.4, limit pin 9.5, waist hole 9.6, groove 9.7), side Surround the pre-positioning hole 10, the side wall 11, and the floor clamp 12.

detailed description

The technical solution of the present invention (including the preferred technical solution) will be described in further detail below by way of Fig. 1 to Fig. 11 and enumerating some optional embodiments of the present invention. Any technical features and any technical solutions in this embodiment are The protection scope of the present invention is not limited. The coordinate system mentioned in the present invention is the vehicle body coordinate system.

As shown in Figures 1 to 4, the vehicle body side wall pre-assembly positioning system designed by the present invention includes a pre-assembly station and an assembly station; the pre-assembly station is provided with a rough positioning mechanism 1, and the assembly station A fine positioning mechanism 2 is provided; the rough positioning mechanism 1 includes a first fixed seat 3 symmetrically arranged on both sides of the side wall 11, and a set of X-direction rough guide blocks 4 oppositely arranged on the top of the first fixed seat 3 , a group of Z-direction support blocks 5 and vertically arranged X-direction coarse guide pins 6; the height of the X-direction coarse guide blocks 4>the height of the X-direction coarse guide pins 6>the height of the Z-direction support blocks 5 ; The X-direction coarse guide block 4 guides the X-direction position of the side wall to ±2.5mm of the theoretical position, and the X-direction coarse guide pin 6 guides the X-direction position of the side wall to ±0.5mm of the theoretical position; The Z-direction support block 5 supports the side wall 11; the fine positioning mechanism 2 includes a second fixing seat 7 symmetrically arranged on both sides of the side wall 11, and the top of the second fixing seat 7 is provided with an X-direction fine guide pin 8 And the Z-direction floating support mechanism 9, the height of the X-direction fine guide pin 8 > the height of the Z-direction floating support mechanism 9; the X-direction fine guide pin 8 guides the X-direction position of the side wall to ±0.25mm of the theoretical position The Z-direction floating support mechanism 9 carries the side wall 11; the X-direction coarse guide pin 6 and the X-direction fine guide pin 8 are located directly below the side wall pre-positioning hole 10, and usually the bottom of the side wall 11 is provided with a row of diameters For the 18mm electrophoresis leakage hole, select one of them as the pre-positioning hole at a suitable position. The coarse positioning mechanism 1 only needs to avoid the working area of the lifting sled and can be located on the ground, and the fine positioning mechanism 2 is installed on the positioning unit of the floor clamp 12 apart from the side wall pre-positioning hole 10 nearest.

As shown in FIG. 5 and FIG. 6 , an embodiment of the coarse positioning mechanism 1 is shown. The X-direction thick guide block 4 includes a vertical portion 4.1 and an inclined portion 4.2; the distance between the same-side inclined portion 4.2 and the joint of the vertical portion 4.1 is greater than the distance between the tops of the same-side inclined portion 4.2. The Z-direction support blocks 5 are located between the X-direction coarse guide blocks 4 , and the X-direction coarse guide pins 6 are located between the Z-direction support blocks 5 .

As shown in FIGS. 7 to 10 , an embodiment of the fine positioning mechanism 2 is shown. The X-direction fine guide pins 8 are located between the Z-direction floating support mechanisms 9 .

As shown in Figure 11, it shows an embodiment of the Z-direction floating support mechanism 9, the Z-direction floating support mechanism 9 includes a base 9.1 connected to the top of the second fixed seat 7 and a floating block 9.2, the floating One end of the block 9.2 is rotationally connected with one end of the base 9.1 through a rotating shaft 9.3; a support spring 9.4 is provided between the bottom of the floating block 9.2 and the top of the base 9.1. A limit pin 9.5 is provided between the base 9.1 and the floating block 9.2; the end of the limit pin 9.5 passes through the side wall of the floating block 9.2 and extends into the waist-shaped hole provided on the base 9.1 In 9.6, like this, waist hole 9.6 cooperates with limit pin 9.5 to limit the movable stroke of floating block 9.2. The base 9.1 is provided with a groove 9.7 for accommodating the floating block 9.2.

Preferably, the diameter of the X-direction coarse guide pin 6 is smaller than the diameter of the X-direction fine guide pin 8 .

Further preferably, both the X-direction coarse guide pin 6 and the X-direction fine guide pin 8 are diamond-shaped pins.

Claims (8)

1. a kind of body side wall pre-installs alignment system, including pre-installs station and be merged station, it is characterised in that：The prepackage station Provided with coarse positioning mechanism, the station that is merged is provided with precise locating mechanism；The coarse positioning mechanism includes being symmetricly set on gusset two First fixed seat of side, be provided with the top of first fixed seat one group of X being oppositely arranged to thick guide pad, be oppositely arranged one group Z-direction support block and the X that is vertically arranged are to thick guide finger；Height ＞ X from the X to height ＞ Z from thick guide pad to thick guide finger To the height of support block；Gusset X is directed at ± the 2.5mm of theoretical position by the X to thick guide pad to position, the X to Gusset X is directed at ± the 0.5mm of theoretical position by thick guide finger to position；The Z-direction support block support gusset；The essence is fixed Position mechanism includes the second fixed seat for being symmetricly set on gusset both sides, and X is provided with to smart guide finger and Z at the top of second fixed seat To Floatable supporting mechanism, height of the X to the height ＞ Z-direction float support blocks of smart guide finger；The X is to smart guide finger by side X is enclosed to be directed at ± the 0.25mm of theoretical position to position；The Z-direction Floatable supporting mechanism carries gusset；The X is oriented to thick Pin and X are respectively positioned on immediately below gusset pre-determined bit hole to smart guide finger；The X includes vertical portion and rake to thick guide pad；Together The distance between inclined portion and vertical portion junction are less than with the distance between inclined portion top；By adjusting X to slightly leading To block, apart from the position of gusset bottom margin, 5mm realizes that gusset X is directed to theoretical position by the X to thick guide pad to position ±2.5mm；By set thick guide finger diameter less than gusset pre-determined bit hole 1mm realize the X to thick guide finger by gusset X to position Put ± the 0.5mm for being directed to theoretical position；By setting X to realize the X less than pre-determined bit hole 0.5mm to smart guide finger diameter Gusset X is directed to ± the 0.25mm of theoretical position to smart guide finger to position.

2. body side wall according to claim 1 pre-installs alignment system, it is characterised in that：The Z-direction support block is located at institute X is stated between thick guide pad, the X is to thick guide finger between Z-direction support block.

3. body side wall according to claim 1 pre-installs alignment system, it is characterised in that：The X is straight to thick guide finger Footpath is less than diameters of the X to smart guide finger.

4. the body side wall prepackage alignment system according to claim 1 or 3, it is characterised in that：The X to thick guide finger and X to smart guide finger be rhombus pin.

5. body side wall according to claim 1 pre-installs alignment system, it is characterised in that：The X is located to smart guide finger Between the Z-direction Floatable supporting mechanism.

6. body side wall according to claim 1 pre-installs alignment system, it is characterised in that：The Z-direction Floatable supporting mechanism Including the pedestal and rocker piece with being connected at the top of the second fixed seat, described rocker piece one end is rotated by rotating shaft and pedestal one end to be connected Connect；Support spring is provided between at the top of the rocker piece bottom and pedestal.

7. body side wall according to claim 6 pre-installs alignment system, it is characterised in that：The pedestal and the rocker piece Between be provided with spacer pin；The spacing pin end passes the rocker piece side wall, and stretches into the mounting hole being located on pedestal.

8. the body side wall prepackage alignment system according to claim 6 or 7, it is characterised in that：The pedestal, which is provided with, to be held Put the groove of the rocker piece.