CN102581541A

CN102581541A - Limiting structure of vehicle body welding fixture

Info

Publication number: CN102581541A
Application number: CN201210083706XA
Authority: CN
Inventors: 马志飞; 冉启洪; 刘同涛; 许德林; 黄勇
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2012-03-27
Filing date: 2012-03-27
Publication date: 2012-07-18

Abstract

The invention discloses a limiting structure of a vehicle body welding fixture, which comprises a compression arm, an upper stop block, a lower stop block, a connecting plate, a rotary shaft, a rotary shaft rotation-preventive block and a hinge plate. The connecting plate is used for connecting a fixture support with a positioning compression unit, the lower end of the connecting plate is connected with the fixture support by a bolt, the upper end of the connecting plate is connected with the hinge plate and the compression arm, and the hinge plate is connected with the compression arm by means of welding (normally by means of carbon-dioxide arc welding). The limiting structure is characterized in that both the upper stop block and the lower stop block are cylinders, a stepped hole used for assembling a bolt is arranged in the middle of each cylinder, and the upper stop block and the lower stop block are respectively connected with the compression arm and the connecting plate by the countersunk bolts. The limiting structure of the fixture can meet the limiting requirement of the fixture, structural design, processing and manufacture can be simplified, and cost is saved.

Description

A kind of automobile body welding anchor clamps position limiting structure

Technical field

The invention belongs to the welding procedure frock field of automobile body welding production line, be specifically related to the anchor clamps position limiting structure.

Background technology

In assembly plant's automobile body welding production process; Weld jig location or pressing section on the welding production line adopt the guide and limit block structure more; (locating surface generally is as far as the mechanism that rotatably compresses more than the two-stage is arranged to come higher locating surface of accurate position location required precision or seal face with this; The present invention is primarily aimed at the position limiting structure of anchor clamps compact heap operating part), this type of guide and limit piece is mainly used in the following situation under one or several the situations that occur simultaneously: when being connected with alignment pin on the briquetting, lateral movement press put forth effort when big, when being pressed on the inclined-plane, when pressing plate is oversize, (do not have back-up block) when pressing plate integral body is too heavy, when pressing plate is unsettled, when being pressed on the covering outer surface, pressing plate is unsettled and when pin is arranged, when a plurality of crimping point is arranged on the pressing plate, when pressing plate is the secondary crimping point etc.Usually above-mentioned guide and limit piece is designed to Fig. 4 or two kinds of structures shown in Figure 5, on structure is formed, can finds out that these two kinds of structures comprise piece and following piece two parts equally; Among Fig. 48 and 9, among Fig. 5 10 and 11; Their common feature is the both direction of restriction compact heap, and direction of putting forth effort along compact heap and the direction that derives and put forth effort perpendicular to compact heap, and its structural design is complicated; Requirement on machining accuracy is high, and manufacturing cost is high.

In practical application; Can there be a kind of like this requirement; And the anchor clamps unit of compressing a requirement one of which direction there is higher positional precision; Can guarantee on the force direction that such as requiring it usually its position deviation is within the 0.5mm scope; And do not have higher requirement for the direction that derives and put forth effort perpendicular to compact heap; So consider just to there is no need the limited block Design and Machining is become to limit the structure of both direction from aspects such as cost and processabilities, for example for the lower body assembly welding clamp, the compact heap position limiting structure on the floor, front and back just can be taked this design fully; And the above-below direction of spacing briquetting only, the main cause that can select this scheme is that following condition is satisfied in these positions: pressed surface rigidity is strong, pressing plate is short, be pressed on horizontal plane, do not have lateral movement or lateral movement to press put forth effort less, pressing plate whole light, be pressed on that not have to have only on alignment pin, the pressing plate one or two crimping point, pressing plate on non-covering surface, the pressing plate be one-level crimping point etc.

Summary of the invention

The purpose of this invention is to provide a kind of automobile body welding anchor clamps position limiting structure, its on the one hand can satisfy the spacing function of anchor clamps briquetting certain condition under, and simply project organization, reduction difficulty of processing are increased work efficiency on the other hand, reduce production costs.

Automobile body welding anchor clamps position limiting structure of the present invention comprises clamping arm, upper limit position block, lower position block, connecting plate, rotating shaft, the anti-switch block of rotating shaft and articulated slab.Wherein, Connecting plate is as the bridge of jockey bearing with the location compressing unit; Its lower end is connected with clamp mount through bolt, and the upper end is connected with articulated slab and clamping arm through rotating shaft, and articulated slab is welded to connect (adopting carbon-dioxide arc welding to be connected usually) with clamping arm.It is characterized in that: said upper limit position block, lower position block are cylinder, open a stepped hole in the centre and are used for assembling bolt, and they are connected with connecting plate with clamping arm through dormant bolt respectively.

Described automobile body welding anchor clamps position limiting structure, connecting plate be used to connect substrate with pressing section, be the maincenter of corresponding fixture unit; Articulated slab and clamping arm are welding association, be corresponding fixture unit compress the action operating part, this welding association is connected with connecting plate through a pin, this pin also is that clamping arm is carried out and compressed and unclamp the rotating shaft when moving; For preventing that rotating shaft from rotating the wearing and tearing that cause axle in the clamping arm motion process, special for rotating shaft is provided with an anti-switch block, it and articulated slab are through being welded together; For the corresponding fixture unit of above-mentioned connecting plate; Seal face on the clamping arm is the core of whole fixture unit; The function that it bears corresponding fixture unit realizes; Obviously the position of seal face has just become the core in the core, so clamping arm and the limited block between the connecting plate just become to guarantee the pillar of seal face position, describes said like the background of front; Strong for pressed surface rigidity, pressing plate is short, be pressed on horizontal plane, do not have lateral movement or lateral movement to press put forth effort less, pressing plate whole light, be pressed on when not having to have only on alignment pin, the pressing plate one or two crimping point, pressing plate to be particular case such as one-level crimping point on non-covering surface, the pressing plate; Limited block is designed to simply to satisfy the direction that limits perpendicular to seal face gets final product, limited block is divided into upper limit position block and lower position block two parts, and the structure of upper limit position block and lower position block respectively as shown in Figures 2 and 3; Promptly in the middle of cylinder, open a stepped hole and be used for assembling bolt; In the clamping arm compaction process, when upper limit position block and lower position block applying, the position of seal face should reach its theoretical position.

The present invention compares with prior art and has the following advantages: according to clamping arm compacted position and structure, preferentially select this anchor clamps position limiting structure under certain condition, can guarantee its spacing requirement, can design and processing and manufacturing by simplified structure again, save cost.

Description of drawings

Fig. 1 is the stereogram of utility model;

Fig. 2 is the profile of upper limit position block in the utility model;

Fig. 3 is the profile of utility model lower limit position piece;

Fig. 4 is anchor clamps position-limit mechanism one sectional drawing commonly used;

Fig. 5 is anchor clamps position-limit mechanism two sectional drawings commonly used.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is done further description.

As shown in Figure 1, a kind of automobile body welding anchor clamps position limiting structure comprises partly composition such as clamping arm 1, upper limit position block 2, lower position block 3, connecting plate 4, rotating shaft 5, the anti-switch block 6 of rotating shaft and articulated slab 7.Connecting plate 4 is as the bridge of jockey bearing with the location compressing unit, and its lower end is connected with clamp mount through bolt, and the upper end is connected (articulated slab 6 adopts carbon-dioxide arc welding to be connected with clamping arm 7 usually) through rotating shaft 5 with articulated slab 6 and clamping arm 7; For preventing in motion process, to cause rotating shaft 5 serious wear to cause connecting precision and intensity is bad, the anti-switch block 6 of square rotating shaft of welding is close to rotating shaft 5 on articulated slab 7.Upper limit position block 2, lower position block 3 are cylinder, open a stepped hole in the centre and are used for assembling bolt, and upper limit position block 2, lower position block 3 are connected with clamping arm 1, connecting plate 4 through dormant bolt respectively.

During assembling; Confirm the position by the designing requirement line earlier; With articulated slab 7 (is each one on plane of symmetry both sides with the clamping arm median plane) and clamping arm 1 welding, articulated slab 7 and anti-switch block 6 welding of rotating shaft; The three forms an association through welding connecting mode, the key of this process be guarantee clamping arm 1 upper cylinder installing hole and rotating shaft 5 installing hole relative position and think about rotating shaft 5 and prevent that with rotating shaft switch block 6 cooperates the position on plane; Lower position block as shown in Figure 33 is assembled on the connecting plate 4 through dormant bolt; Upper limit position block as shown in Figure 22 is assembled on the clamping arm 1 through dormant bolt.

After treating that the above-mentioned work that is welded is accomplished, articulated slab 7 is connected through rotating shaft 5 with connecting plate 4, and guarantees that anti-switch block 6 planes of rotating shaft 5 and rotating shaft cooperate; With the installing hole on the clamping arm 1 cylinder choose is installed, check above-mentioned respectively assemble link errorless after, utility model shown in Figure 1 is installed on the clamp mount through bolt; Clamp mount is connected with fixture substrate through bolt; So just formed the fixture unit of an entity, several fixture units connect through the gas circuit (being example here with the air-actuated jaw) that designs on the fixture substrate, like this; Under aeration status, whole pair of anchor clamps position clamping successively according to operating sequence.

For preventing that in motion process the rotating shaft serious wear causes connecting precision and intensity is bad, anti-switch block of square rotating shaft of welding and rotating shaft are close on articulated slab; Upper limit position block, lower position block are connected with clamping arm, connecting plate through bolt respectively.

Claims

1. an automobile body welding anchor clamps position limiting structure comprises clamping arm (1), upper limit position block (2), lower position block (3), connecting plate (4), rotating shaft (5), the anti-switch block (6) of rotating shaft and articulated slab (7); Connecting plate (4) lower end is connected with clamp mount through bolt, and the upper end is connected with articulated slab (7) and clamping arm (1) through rotating shaft (5), and articulated slab (7) is welded to connect with clamping arm (1); It is characterized in that: said upper limit position block (2), lower position block (3) are cylinder, open a stepped hole in the centre and are used for assembling bolt, and they are connected with connecting plate (4) with clamping arm (1) through dormant bolt respectively.

2. automobile body welding anchor clamps position limiting structure according to claim 1 is characterized in that: go up the anti-switch block (6) of square rotating shaft of welding at said articulated slab (7) and be close to rotating shaft (5).