Across Automobile D7 Automatic Welding Production Line Project
1. Project name
Across Automobile D7 Automatic Welding Production Line Project
2. Project implementation time
2018.3
3. Project introduction
Models: 4 models collinear
Capacity: 20JPH
Robot: Kawasaki
Quantity: 8 sets
Main line conveying method: roller bed skid
Special upper form: Pick up (front wall/top cover)
4. Core technology
Independent analysis of SE, independent planning of the whole line
As one of the four major processes in the automotive industry, the
welding process is self-evident. It shoulders the important mission
of forming the body and providing a supporting frame for the
vehicle. In addition to ensuring the appearance and shape, it must
also ensure that all parts of the final assembly The precision of
the component installation point, so its process is far more
complicated than the other three major processes. The planning and
layout of the production line not only need to consider from the
aspects of precision assurance, production efficiency, distribution
logistics, and storage, but are also limited by the plant area and
structure, Existing conditions such as painting corridors. There is
no perfect layout plan, only the most suitable layout plan at
present.
Splitting the process and determining the number of stations
The design department enters the overall product structure,
drawings, and process routes, defines the content of the welding
process, and then splits the process into a single station. The
following principles must be followed:
(1) Spot welding is generally calculated according to the average
operation time of each welding spot of 3s;
(2) Due to the low dust emission and low work efficiency of arc
welding, it is necessary to arrange it as concentrated as possible
to avoid dispersion;
(3) The operating time of loading, picking up, clamping and opening
of fixtures can be set according to past experience;
(4) The effective working time + delivery time of a single station
shall not be greater than the working time of the station;
(5) The station loss in the conveying arrangement needs to be
considered.
Delivery method of side panel assembly
Most of the side wall assembly belongs to the A-level appearance
surface, which requires high surface quality. Therefore, its
conveying method needs to consider the conveying efficiency,
whether it needs inventory, the layout area of the side wall line
and other factors. It can be divided into single-side wall
conveying and There are two kinds of supporting conveying for both
sides.
(1) Single side wall conveying
Advantages: low cost, integrated gripper and conveying, no need to
set up spreader and gripper separately;
Disadvantages: 1: Only one assembly can be returned to transport
the next assembly after the work is completed, and the beat is low;
2: There is no buffer inventory, when the side line is abnormal, it
will directly affect the shutdown of the entire production line,
and there is no room for buffering ; 3: After the side wall is
transported, it needs to be used with the turning fixture.
Scope of application: Applicable to welding lines with a relatively
low tempo, and the side lines must be arranged on both sides of the
main line, and the assembly station must be used with the flip
fixture.
(2) Supporting conveying on both sides
Advantages: high conveying efficiency, flexible formulation of
buffer inventory, and not limited by conveying distance, flexible
selection of assembly station fixtures.
Disadvantages: It needs to be used with automatic grippers or
grabbing robots, and the cost is high.
Scope of application: suitable for high-tact production lines, when
the workshop area is large and the side line is far away from the
main line.
