488 results about "Body in white" patented technology

The invention discloses an interior noise analysis and prediction method of a high speed train. The method comprises the following steps: establishing a train reconditioning train body model, a statistical energy analysis model of a body in white structure and an interior and exterior vocal cavity statistical energy analysis model, and carrying out simplification and subsystem division; obtaining the statistical energy analysis parameters of the train body structure and an interior vocal cavity model, and loading the statistical energy analysis parameters onto a train body structure model plate subsystem and a vocal cavity model subsystem; and obtaining exterior vocal excitation source energy borne on the train body, applying the exterior vocal excitation source energy onto the exterior vocal cavity statistical energy analysis model, causing the exterior vocal excitation source energy to reach an interior vocal cavity after the exterior vocal excitation source energy is attenuated by the sound insulation property of a structural plate in a body in white structure model so as to obtain structural noise energy radiated into the train by the reconditioning train body under the function of the two-line suspension force of a compartment, and then, carrying out interior noise analysis and prediction. The problem that the interior noise of the train is difficult in prediction and the problems of the upper limit boundedness of a frequency domain, complex calculation flow, incomplete motivation consideration in the traditional method are overcome, calculation efficiency and prediction accuracy are improved, and development and test cost is lowered.

The invention discloses an automotive body in white torsion rigidity test system. The system comprises: a constraint subsystem and a loading subsystem. The constraint subsystem comprises: a front suspension rack and a rear suspension rack. The loading subsystem comprises at least two power take-offs and a loading device. Through using an innovative improved design, the test system can carry out adaptive adjusting during a test process so that generation of stress can be reduced, versatility is good and test needs of different kinds of vehicle types can be satisfied. The invention also discloses a method for carrying out an automotive body in white torsion rigidity test by using the above test system. By using the method, the automotive body in white can be easily and rapidly leveled and ideal test data can be acquired. The test method of the automotive body in white torsion rigidity can be substantially improved. Compared to the other current test method, innovation improvements are realized in many aspects, such as the constraint processing, a position and a mode of load applying, collection of the test data and determination and the like.

The present invention generally relates to a method and programmable apparatus for the assembly of body components to an automotive body that has undergone a progressive series of framing and welding steps so as to produce a structurally rigid body frame, termed a body-in-white. More specifically, this invention relates to creating a new net locating scheme (X-Y and Z Cartesian coordinate system) for a body-in-white to direct associated tooling to create net attachment features on a rigid body frame with respect to a new net locating scheme so that components may be attached to an automotive body at a net location eliminating the need for any slip plane attachment techniques.

A flexible integrated test system of dynamic and static properties of a combination automotive body-in-white comprises a portal frame, a support restraint device, an adjustable concentrated force loading device, a torsion pendulum frame loading device and a measuring appliance assembly. The support restraint device for supporting the automotive body-in-white to be tested is fixed on the portal frame, the measuring appliance assembly is fixed on the portal frame by a support or directly fixed on the portal frame, the adjustable concentrated force loading device and the torsion pendulum frame loading device which loads stress on the automotive body-in-white to be tested are fixed on the portal frame or arranged on the peripheral side of the portal frame. The flexible integrated test system of dynamic and static properties of the combination automotive body-in-white has the advantages of simple and compact structure, reasonable layout, convenient operation, comprehensive function, wide application and good expansibility.

The present invention generally relates to a method and programmable apparatus for the assembly of body components to an automotive body that has undergone a progressive series of framing and welding steps so as to produce a structurally rigid body frame, termed a body-in-white. More specifically, this invention relates to creating a new net locating scheme (X, Y and Z Cartesian coordinate system) for a body-in-white to direct associated tooling to create net attachment features on a rigid body frame with respect to a new net locating scheme so that components may be attached to a automotive body at a net location eliminating the need for any slip plane attachment techniques.

The invention provides a passenger car body-in-white bending and torsion stiffness test restraint device which includes a workbench, a torsion crossbeam, a first column, a second column, a third column, and a fourth column. The torsion crossbeam is horizontally arranged on one side of the workbench via a support, and can rotate horizontally around the support. The lower end of the first column and the lower end of the second column are arranged on the two sides of the torsion crossbeam respectively. The lower end of the third column and the lower end of the fourth column are arranged on the other side of the workbench at an interval. The top end of each column is provided with a connecting member which limits three mobile degrees of freedom but does not limit three rotational degrees of freedom. The lower end of the third column or the lower end of the fourth column is fixed on the workbench, and among the connecting members between the lower ends of the remaining three columns and the workbench or the torsion crossbeam, one is a unidirectional rotary hinge, and the other two are connecting members which limit three mobile degrees of freedom but does not limit three rotational degrees of freedom. In such a manner, the six degrees of freedom of the car body space are restrained, the influence of a frame to the car body stiffness is eliminated, and the car body posture can be easily adjusted.

The invention discloses a car body-in-white welding spot positioning method and device based on robot visual servo. The method comprises the steps that a partial car body image with body-in-white welding spots is collected and stored in a storage unit, and the image is read from the storage unit; the image is preprocessed; edge extraction is performed on the preprocessed image; the position coordinates and radius sizes of the car body-in-white welding spot or circular hole targets in the image are acquired by utilizing random Hough transformation; a target image is intercepted, feature extraction and classification recognition are performed on the target image, and a positioning coordinate is obtained and transmitted to a robot control system. According to the car body-in-white welding spot positioning method and device, quick and automatic recognizing and positioning of a car body-in-white welding spot quality detection robot on the body-in-white welding spots to be detected are achieved, the car body-in-white welding spot quality detection robot can be guided to accurately position the body-in-white welding spots, and the key technical problems are solved for achieving intelligent detection of the car body-in-white welding spot quality detection robot on the welding spot quality on a car industry manufacturing production line.

A method for producing a body-in-white of a passenger car is provided. A support structure assigned to the body-in-white of the motor vehicle and which includes at least one support part is produced. The support part of the support structure is, depending on a variant of the motor vehicle, at least in some regions provided with at least one reinforcing part.

The invention relates to the mechanical automation technical field, particularly to an SUV (Sport Utility Vehicle) vehicle automatic welding production line and a production method thereof. The unmanned operation on the integral SUV body-in-white automatic welding production line is implemented through the control on coordinative operation of a plurality of robots, the matching of clamping of a particular fixture and the automatic welding of the welding robots. The production method comprises conveying a left side body and a right side body of a vehicle body and a lower vehicle body to an integral assembly workstation through bilateral intelligent air conveying devices and a lower vehicle body conveying roller bed for integral vehicle body assembly respectively and achieving the floor repair welding action through four of the welding robots; continuing to conveying integral welding products of the integral assembly workstation to a first repair welding workstation through the roller bed, performing the repair welding action through four of the welding robots, continuing to conveying the integral welding products to a third workstation and achieving the repair welding action through two of the robots; continuing to conveying the bodies in white conveyed from the third workstation after welding to a storage workstation through the roller bed and placing the bodies in white at the appropriate position of the storage workstation to perform the body-in-white storage. According to the integral body-in-white automatic welding production line, the unmanned operation is implemented, the degree of automation is high, and the production efficiency is high.

The invention relates to a welding manipulator which comprises a feeding device and welding pliers connected with the feeding device. The feeding device comprises a linear module and a rotating module which are connected with the welding pliers; the rotating module comprises a gear bank rotating module connected with the feeding device by a slewing bearing; the welding pliers are fixed on the gear bank rotating module; the welding manipulator replaces a robot to move so as to carry out feeding by the linear module and the rotating module and is low in cost; by the linear motion of the linear module and the rotation motion of the rotating module, the high-accuracy positioning of a random space trace can be implemented in a mechanical stroke; the rotating module adopts the gear bank rotating module to carry out high accuracy rotation; the linear module implements high-accuracy linear transmission; when the linear module is linked with the rotating module in a multi-axis manner, the full-automatic welding of a resistance spot welding point on an automobile body in white can be implemented; the welding pliers are fixed and driven to rotate by a gear of the gear bank rotating module; the structure setting is ingenious; an additional connecting mechanism is simplified; and the high-accuracy feeding is implemented by gear transmission.

The invention provides a body-in-white torsional fatigue testing system and a method thereof. The body-in-white torsional fatigue testing system comprises a constraint subsystem and a loading subsystem, wherein the constraint subsystem comprises a front shock absorber bearing rack for supporting a first end of a body-in-white and driving the body-in-white to generate torsion, and a rear shock absorber bearing rack for supporting a second end of the body-in-white; and the loading subsystem is used for loading the front shock absorber bearing rack so as to drive the body-in-white to generate the torsion. According to the body-in-white torsional fatigue testing system and the body-in-white torsional fatigue testing method provided by the invention, the fatigue state of the body-in-white of an automobile under a torsional working condition can be very easily and rapidly tested, including data such as fatigue life of metal plate and cracked welding spots; and the testing method on the torsional fatigue property of the body-in-white is substantially improved.

A "soft touch" lifter for an automotive "Body in White" geometry station like a framing system is disclosed having a unique lifting assembly for elevating both the automotive body and the underbody tooling to a geometry position. The system includes a lift assembly which is vertically slidably mounted to a stationary base and movable between a first position in which the lift frame is positioned beneath a skid positioned at the geometry station and upon which the automotive body is supported, and a second position elevated from the first position. An underbody tooling assembly is mounted to the lift frame, and this tooling assembly includes a plurality of locators which register with position receptors on the automotive underbody when the skid is positioned at the geometry station. A pair of T-shaped lift arms are slidably mounted to the stationary base at opposite ends of the skid, and these lift arms are movable between a lower and an upper position. In their lower position, the lift arms register with the skids so that movement of the lift arms from their lower and to their upper position simultaneously elevates the skid with its supported automotive body to an upper position. A closed loop belt mechanically connects the lift arms to both the stationary base and the lift frame so that the lift arms move from their lower and to their upper position at a speed substantially one-half of the speed of movement of the lift frame from its first and to its second position. Furthermore, as the lift frame approaches its second position and the lift arms simultaneously approach their upper position, the tooling locators fully engage the receptors in the automotive body and slightly elevate the automotive body from the skid to the geometry position to avoid any geometrical impact from the handling system to the part located by the geometry tooling.

The invention discloses a body-in-white welding spot optimization method based on a variable density method and the fatigue life analysis, and the method comprises the specific steps of building a finite element model of a whole vehicle, and building a body-in-white welding spot finite element model; partitioning the established body-in-white welding spot model according to the modal influence weight; establishing a welding spot topological optimization calculation model based on the variable density method partition; applying an inertia release method to the body-in-white welding spot model after topology optimization, and taking a load spectrum of virtual iteration as excitation; calculating the stress distribution around a welding spot under excitation, and analyzing the fatigue life of the welding spot to predict the potential risk of the welding spot; and carrying out position and number optimization adjustment on a welding spot area with insufficient fatigue life. According to the method, the number of the body-in-white welding spots is reduced through the topological optimization, the body-in-white light target is achieved, the design variables of the fatigue life analysis are reduced, the calculation efficiency is improved, and the method plays a key role in improving the body-in-white rigidity and the modal performance.

The invention discloses a flexible assembly system for welding. According to the flexible assembly system for welding, assembly clamps corresponding to different vehicle models are conveyed through overhead clamp conveying rails so that bodies in white can be clamped and fixed to welding stations of a high speed roller bed conveying guide rail, after the bodies in white are welded on the welding stations, the assembly clamps are driven by a lift to leave the high speed roller bed conveying guide rail, and the bodies in white are conveyed through the high speed roller bed conveying guide rail. According to the system, different models of bodies in white are fixed through different models of assembly clamps conveyed by the multiple parallel overhead clamp conveying rails, so that occupied area is reduced, the space utilization rate is increased, maintenance and detection are convenient to perform, and the purpose of flexible assembly for flexible welding is achieved. The flexible assembly for welding is used in the field of welding production lines.

An improved method of manufacturing an assembly comprising at least two components. Assembly components are attached together to form a combined assembly. The combined assembly is engaged by a single framing fixture that establishes the spatial relationships between each of the assembly components. After the spatial relationships are final, the assembly is fixed having securing points that are accessible when engaged by the single framing fixture. The method significantly reduces the load-weld-load sequences used in conventional body-in-white framing processes for motor vehicles.